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WO2011087199A1 - Molten iron manufacturing apparatus for reducing emissions of carbon dioxide - Google Patents

Molten iron manufacturing apparatus for reducing emissions of carbon dioxide Download PDF

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Publication number
WO2011087199A1
WO2011087199A1 PCT/KR2010/006126 KR2010006126W WO2011087199A1 WO 2011087199 A1 WO2011087199 A1 WO 2011087199A1 KR 2010006126 W KR2010006126 W KR 2010006126W WO 2011087199 A1 WO2011087199 A1 WO 2011087199A1
Authority
WO
WIPO (PCT)
Prior art keywords
molten iron
gas
manufacturing apparatus
cog
mixed gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2010/006126
Other languages
French (fr)
Korean (ko)
Inventor
정종헌
김기현
이시형
김성만
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Posco Holdings Inc
Original Assignee
Posco Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Posco Co Ltd filed Critical Posco Co Ltd
Priority to CN201080061728.5A priority Critical patent/CN102762748B/en
Publication of WO2011087199A1 publication Critical patent/WO2011087199A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C21B13/0073—Selection or treatment of the reducing gases
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K3/00—Modifying the chemical composition of combustible gases containing carbon monoxide to produce an improved fuel, e.g. one of different calorific value, which may be free from carbon monoxide
    • C10K3/02—Modifying the chemical composition of combustible gases containing carbon monoxide to produce an improved fuel, e.g. one of different calorific value, which may be free from carbon monoxide by catalytic treatment
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K3/00—Modifying the chemical composition of combustible gases containing carbon monoxide to produce an improved fuel, e.g. one of different calorific value, which may be free from carbon monoxide
    • C10K3/06—Modifying the chemical composition of combustible gases containing carbon monoxide to produce an improved fuel, e.g. one of different calorific value, which may be free from carbon monoxide by mixing with gases
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B5/00—Making pig-iron in the blast furnace
    • C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/20—Increasing the gas reduction potential of recycled exhaust gases
    • C21B2100/22—Increasing the gas reduction potential of recycled exhaust gases by reforming
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/20—Increasing the gas reduction potential of recycled exhaust gases
    • C21B2100/26—Increasing the gas reduction potential of recycled exhaust gases by adding additional fuel in recirculation pipes
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
    • C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
    • C21B2100/62—Energy conversion other than by heat exchange, e.g. by use of exhaust gas in energy production
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C2100/00—Exhaust gas
    • C21C2100/02—Treatment of the exhaust gas
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C2100/00—Exhaust gas
    • C21C2100/04—Recirculation of the exhaust gas
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention relates to a molten iron manufacturing apparatus, and more particularly, to a molten iron manufacturing apparatus that can reduce the amount of carbon dioxide generated in the molten iron manufacturing process and produce hydrogen, liquid fuel and electrical energy.
  • carbon dioxide contained in by-product gas is considered to be the cause of climate change, and it needs to be recovered and recycled.
  • the present invention is to provide a molten iron manufacturing apparatus for reducing the amount of carbon dioxide generated in the molten iron manufacturing process by recycling the carbon dioxide generated in the steelmaking process.
  • the present invention is to provide a molten iron manufacturing apparatus capable of producing liquid fuel and electrical energy in the molten iron manufacturing process.
  • An apparatus for manufacturing molten iron is molten iron for producing molten iron and generating by-product gas.
  • the apparatus for producing molten iron is coke, which produces coke and generates COG.
  • the mixed gas is mixed with the COG to generate a mixed gas.
  • a mixed gas reforming apparatus for reforming the mixed gas to generate a reducing gas, and an iron ore reducing apparatus for reducing the iron ore by receiving the reducing gas.
  • the molten iron manufacturing apparatus further includes a by-product gas purification equipment
  • the by-product gas purification equipment may supply the steel production by-product gas to the gas mixing device after purifying the harmful components in the steel production by-product.
  • the off-gas purification plant may include at least one of a cyclone, a filter and a scrubber.
  • the by-product gas purification equipment may further include a heat exchange device.
  • the apparatus for manufacturing molten iron may further include a COG refining facility, and the COG refining facility may supply the COG to the gas mixing device after purifying harmful components in the COG.
  • the COG purification plant may include at least one of a cyclone, a filter, a scrubber and an impurity purification reactor.
  • the COG refining plant may further comprise a heat exchange device.
  • the apparatus for producing molten iron further includes a tar reforming reactor, which is connected to the COG refining plant and may reform tar separated from the COG before being purified.
  • the molten iron manufacturing apparatus may further include a heat exchanger, and the heat exchanger may supply heat generated in the molten iron manufacturing furnace to the mixed gas reformer.
  • the molten iron manufacturing apparatus may further include a mixed gas refinery, and the mixed gas refinery may be provided between the gas mixing device and the mixed gas reformer to purify the mixed gas and supply the mixed gas to the mixed gas reformer.
  • the molten iron manufacturing apparatus may further include a first heat exchanger, and the first heat exchanger may supply heat generated in the molten iron manufacturing furnace to the mixed gas reformer.
  • the apparatus for manufacturing molten iron further includes a hydrogen separation device and a carbon dioxide regeneration device, the hydrogen separation device is connected to the mixed gas reformer to separate hydrogen from the reducing gas, and the carbon dioxide regeneration device is supplied from the hydrogen separation device. The hydrogen received can be reacted with carbon dioxide.
  • the molten iron manufacturing apparatus further includes a water separation device, the water separation device is connected to the carbon dioxide regeneration device, it is possible to separate and remove the water generated in the carbon dioxide regeneration device.
  • the molten iron manufacturing apparatus further includes a liquid fuel generating device, the liquid fuel generating device is connected to the mixed gas reforming device, can be supplied with a reducing gas from the mixed gas reforming device to generate a liquid fuel.
  • the liquid fuel produced by the liquid fuel generating device may include at least one of methanol, dimethyl ether and hydro carbon.
  • the liquid fuel generating device may be a slurry reactor.
  • the molten iron manufacturing apparatus may further include a second heat exchanger, and the second heat exchanger may supply heat generated from the liquid fuel generating device to the mixed gas reformer.
  • the molten iron manufacturing apparatus further comprises a compressor, the compressor may be provided between the mixed gas reforming device and the liquid fuel generating device.
  • the apparatus for manufacturing molten iron further includes a power generation device, which is connected to the liquid fuel generating device and may receive electric gas from the liquid fuel generating device to produce electrical energy.
  • the power generation device may be a turbine.
  • the mixed gas generated in the gas mixing device may include hydrogen (H 2 ) and carbon monoxide (CO), and the molar ratio of the hydrogen and carbon monoxide may be 0.5 or more and 2.0 or less.
  • the mixed gas may further include carbon dioxide (CO 2 ) and methane (CH 4 ), and the molar ratio of the carbon dioxide and the methane may be 0.7 or more and 4.0 or less.
  • the apparatus for producing molten iron further includes a hydrogen separation device and a carbon dioxide regeneration device, wherein the hydrogen separation device is connected to the COG refining plant to separate hydrogen from COG, and the carbon dioxide regeneration device receives hydrogen supplied from the hydrogen separation device. Can react with carbon dioxide.
  • the molten iron manufacturing apparatus further includes a water separation device, the water separation device is connected to the carbon dioxide regeneration device, it is possible to separate and remove the water generated in the carbon dioxide regeneration device.
  • the apparatus for manufacturing molten iron is a first iron ore reducing apparatus for reducing iron ore to produce reduced iron and molten iron for producing molten iron and generating byproduct gas by receiving the reduced iron.
  • Coke to generate a a gas mixing device for mixing the by-product gas and the COG to generate a mixed gas, a mixed gas reforming device for reforming the mixed gas to generate a reducing gas and reducing gas to reduce the iron ore It may include a second iron ore reduction device.
  • the molten iron manufacturing apparatus may further include a by-product gas purification equipment, and the by-product gas purification equipment may supply the steel-by-product by-product gas to the gas mixing device after purifying harmful components in the steel production by-product.
  • the apparatus for manufacturing molten iron may further include a COG refining facility, and the COG refining facility may supply the COG to the gas mixing device after purifying harmful components in the COG.
  • the apparatus for manufacturing molten iron includes a gas distribution device between the mixed gas reformer and the second iron ore reduction device, and the gas distribution device sends a portion of the reducing gas generated in the mixed gas reformer to the second iron ore reduction device. And the rest to the first iron ore reduction apparatus.
  • the first iron ore reduction device or the second iron ore reduction device may be a flow reducing furnace.
  • FIG. 1 is a schematic view showing a molten iron manufacturing apparatus according to a first embodiment of the present invention.
  • FIG. 2 is a schematic view showing a molten iron manufacturing apparatus according to a second embodiment of the present invention.
  • FIG. 3 is a schematic view showing a molten iron manufacturing apparatus according to a third embodiment of the present invention.
  • FIG. 4 is a schematic view showing a molten iron manufacturing apparatus according to a fourth embodiment of the present invention.
  • FIG. 5 is a schematic view showing a molten iron manufacturing apparatus according to a fifth embodiment of the present invention.
  • FIG. 6 is a schematic view showing a molten iron manufacturing apparatus according to a sixth embodiment of the present invention.
  • FIG. 7 is a schematic view showing a molten iron manufacturing apparatus according to a seventh embodiment of the present invention.
  • FIG. 1 is a schematic view showing a molten iron manufacturing apparatus according to an embodiment of the present invention.
  • the molten iron manufacturing apparatus is a molten iron manufacturing furnace 110, coke oven 120, gas mixing device 130, mixed gas reforming device 140, iron ore reduction device ( 150, a by-product gas purification facility 160, a COG purification facility 170, a first heat exchanger 180, a water vapor separation device 190, and a power generator 195.
  • the molten iron manufacturing furnace 110 is an apparatus for producing molten iron and slag using iron-containing raw materials and carbon-containing raw materials and generating by-product gas.
  • the iron-containing raw material may be iron ore and the carbon-containing raw material may be coal.
  • the iron-containing raw material reduction reaction mainly consists of carbon monoxide (CO) and hydrogen (H 2 ) and are represented by the following formulas (1) and (2), respectively.
  • the by-product gas may have a H 2 / CO molar ratio of 0.5 or more at a high temperature of 350 ° C. or more.
  • the by-product gas is supplied to the gas mixing device 130 via the by-product gas purification plant 160.
  • the by-product gas purification facility 160 is provided between the molten iron manufacturing furnace 110 and the gas mixing device 130, and the harmful components such as particulate dust, nitrogen oxides (NOx), sulfur oxides (SOx), and mercury contained in the by-product gas. To remove the device.
  • the by-product gas purification equipment 160 includes a cyclone, a filter, a scrubber, or the like to remove harmful components.
  • the by-product gas purification equipment 160 may include a heat exchange device (not shown) or the like to maintain the thermal efficiency of the by-product gas.
  • the heat exchanger recovers heat from the hot by-product gas and supplies heat to the purified by-product gas before the purified by-product gas is supplied to the gas mixing device 130.
  • the heat exchanger may be present in the form of a combined cyclone, filter or scrubber.
  • the coke oven 120 produces coke and generates a coke oven gas (COG) of 800 ° C. or higher.
  • Coke may be used as a heat source and reducing agent of the molten iron manufacturing furnace (110).
  • COG is mostly composed of hydrogen (58%), methane (26%) and carbon monoxide (6%).
  • COG may be used as a heat source for steelmaking processes and may be used for the production of reducing gas, hydrogen, methanol or direct reduced iron.
  • the COG is supplied to the gas mixing device 130 via the COG purification plant 170.
  • the COG refining facility 170 is provided between the coke oven 120 and the gas mixing device 130.
  • the COG refining facility 170 includes particulate dust, sulfur compounds (H 2 S), ammonia (NH 3 ), BTX, mercury, and the like contained in the COG. It is a device that removes ingredients.
  • the COG purification plant 170 includes a cyclone, a filter, a scrubber or an impurity purification reactor to remove harmful components.
  • the COG refining plant 170 may include a heat exchanger (not shown) or the like to maintain the thermal efficiency of the by-product gas.
  • the heat exchanger recovers heat from the high temperature COG, and supplies heat back to the purified COG before the purified COG is supplied to the gas mixing device 130.
  • the heat exchanger may be present in combination with a cyclone, a filter, a scrubber, or the like.
  • the gas mixing device 130 is a device that generates a mixed gas by mixing a by-product gas and a COG component.
  • the mixed gas includes hydrogen (H 2 ), carbon monoxide (CO), carbon dioxide (CO 2 ) and methane (CH 4 ).
  • the molar ratio of hydrogen and carbon monoxide may be 0.5 or more and 2.0 or less, and the molar ratio of carbon dioxide and methane may be 0.7 and 4.0 or less .
  • the mixed gas may include water vapor (H 2 O) and nitrogen (N 2 ).
  • the O / C molar ratio in the mixed gas may be at least 1.0.
  • This ratio can be controlled by adding excess carbon dioxide in by-product gas or excess carbon dioxide recovered from the steelmaking process. This ratio can also be adjusted by introducing steam or extra steam in the by-product gas.
  • Mixed gas reforming unit 140 is a device for generating a reducing gas by reforming the mixed gas.
  • the generated reducing gas includes hydrogen and carbon monoxide.
  • the mixed gas reformer 140 is a device for generating hydrogen (H 2 ) and carbon monoxide (CO) by mainly reacting methane (CH 4 ) and carbon dioxide (CO 2 ), and the reforming reaction is represented by Chemical Formulas 3 to 3 below. Appears as (6).
  • Fluidized bed reactors may be used as the mixed gas reformer 140. Using a fluidized bed reactor can prevent catalyst deactivation by carbon deposition and improve the yield of hydrogen and carbon monoxide produced.
  • a first heat exchanger 180 may be provided between the molten iron manufacturing furnace 110 and the mixed gas reformer 140.
  • the first heat exchanger 180 supplies the heat generated from the molten iron manufacturing furnace 110 to the mixed gas reformer 120.
  • Iron ore reduction device 150 is a device for reducing iron ore by receiving a reducing gas from the mixed gas reformer 140 to produce reduced iron. That is, the reducing gas acts as a reducing agent in the iron ore reduction apparatus 150.
  • Iron ore supplied to the iron ore reduction device 150 may have a smaller average particle size than iron ore supplied to the molten iron manufacturing furnace (110). For example, fine iron ore having an average particle size of 1 mm or less can be supplied to the iron ore reduction device 150.
  • Iron ore reduction device 150 may be a fluidized bed reactor capable of operating at a temperature of 700 °C or more, pressure 1 bar or more.
  • the fluidized bed reactor may be in the form of bubbling, turbulent or riser.
  • Counter current type or spray type fluidized bed reactors in which the ultra fine iron ore descends and the reducing syngas rises may also be used.
  • the reduced iron produced in the iron ore reduction apparatus 150 may be put into a converter, blast furnace, in particular an electric furnace to contribute to reducing carbon dioxide in the steel process.
  • the steam ore separation device 190 may be connected to the iron ore reduction device 150.
  • the steam separator 190 separates and removes steam generated in the iron ore reduction process, and may recover heat.
  • the power generation device 195 is connected to the water vapor separation device 190 to receive electric steam and mixed gas to produce electric energy.
  • the produced electrical energy can be supplied to each device constituting the molten iron manufacturing device.
  • the power generation device 195 may be a turbine.
  • FIG. 2 is a schematic view showing a molten iron manufacturing apparatus according to a second embodiment of the present invention.
  • the basic components of the apparatus for manufacturing molten iron according to the second embodiment of the present invention is the same as the first embodiment, but further provided with a tar reforming reactor 210.
  • the tar reforming reactor 210 is a device for reforming tar generated during the COG purification process.
  • the tar reforming reactor 210 is installed together with the COG purification plant 170. Since the tar is reformed in the tar reforming reactor 210, the COG may be introduced into the gas mixing device 130 in a state where the contents of carbon dioxide and hydrogen are increased.
  • FIG. 3 is a schematic view showing a molten iron manufacturing apparatus according to a third embodiment of the present invention.
  • the basic components of the apparatus for producing molten iron according to the second embodiment of the present invention is similar to the first embodiment, but after the by-product gas and COG flows into the gas mixing device 130 together mixed gas purification equipment The gas is introduced into the gas mixing device 140 through the 310.
  • the mixed gas purification plant 310 separates the solid particles from the mixed gas in which the by-product gas and the COG are mixed. Solid particles are separated mainly with tar residues from COG as iron ore and coal residues. The solid particles and tar residues thus separated can be made into briquettes or pellets at high temperatures and introduced into a blast furnace, converter or electric furnace.
  • Figure 4 is a schematic diagram showing a molten iron manufacturing apparatus according to a fourth embodiment of the present invention.
  • the basic components of the apparatus for manufacturing molten iron according to the fourth embodiment of the present invention are similar to those of the third embodiment, but the hydrogen separation device 410, the carbon dioxide regeneration device 420, and the water separation device 430. Was further provided.
  • the hydrogen separation device 410 separates hydrogen from the reducing gas generated by the mixed gas reformer 140 and supplies the hydrogen to the carbon dioxide regeneration device 420.
  • the carbon dioxide regeneration device 420 reacts the hydrogen supplied from the hydrogen separation device 410 with carbon dioxide to generate carbon monoxide and water vapor.
  • the reaction scheme is represented by the following formula (7).
  • the water separator 430 is a device for separating and removing water vapor generated from the carbon dioxide regeneration device 420. As a result, carbon monoxide is added to the reducing gas and supplied to the iron ore reduction device 150, thereby reducing the reducing agent ratio.
  • FIG. 5 is a schematic view showing a molten iron manufacturing apparatus according to a fifth embodiment of the present invention.
  • the basic components of the apparatus for manufacturing molten iron according to the fifth embodiment of the present invention are similar to those of the third embodiment, but further include a liquid fuel generating device 510.
  • the liquid fuel generating device 510 is connected to the iron ore reduction device 130 to generate a liquid fuel by receiving a mixed gas.
  • Water vapor in the mixed gas generated in the iron ore reduction device 150 is separated and removed in the water vapor separation device 190, and the remaining gas is supplied to the liquid fuel generating device (510).
  • the remaining gas may be compressed in the compressor 520 before being supplied to the liquid fuel generating device 510.
  • the resulting liquid fuel may be methanol, dimethyl ether, hydro carbon, or the like.
  • Methanol is produced by hydrogenation of carbon monoxide (CO), hydrogenation of carbon dioxide (CO 2 ), and water gas shift reaction. Each reaction is represented by the following formulas (8) to (10).
  • Dimethyl ether can be produced by methanol and is represented by the following formula (11).
  • liquid fuel generator 510 catalyst deactivation due to carbon deposition can be prevented by using a slurry reactor, which is one of fluidized bed reactors.
  • Slurry reactor is composed of metal solid phase catalyst, liquid molecular wax (high molecular weight liquid) of hydrocarbon and by-product gas containing carbon dioxide, carbon monoxide and hydrogen.
  • By-product gas reacts with catalyst to produce liquid fuel such as methanol.
  • the liquid wax of the hydrocarbon is a medium for transferring heat and substances, and a second heat exchanger 530 may be installed to recover heat generated by an exothermic reaction.
  • the second heat exchanger 530 recovers heat generated by the liquid fuel generating device 510 and transfers heat to the mixed gas supplied to the mixed gas reformer 140. Thermal efficiency may be increased by the operation of the second heat exchanger 530.
  • the structure of the liquid fuel generating device 510 is not limited to a slurry reactor, a fixed bed reactor consisting of by-product gas and a catalyst layer may also be used.
  • Liquid fuel such as methanol generated in the liquid fuel generating device 510 and water are separated from each other in the liquid fuel / water separator 540, and the generated mixed gas is supplied to the power generator 195.
  • FIG. 6 is a schematic view showing a molten iron manufacturing apparatus according to a sixth embodiment of the present invention.
  • the first iron ore reducing device 610 is a device for reducing iron ore to produce reduced iron.
  • the molten iron manufacturing furnace 620 receives molten iron and produces molten iron.
  • the gas distribution device 630 supplies a part of the reducing gas generated in the mixed gas reformer 140 to the first iron ore reduction device 610 and supplies the rest to the second iron ore reduction device 640.
  • the first iron ore reducing device 610 or the second iron ore reducing device 640 may be a flow reducing furnace.
  • FIG. 7 is a schematic view showing a molten iron manufacturing apparatus according to a seventh embodiment of the present invention.
  • the hydrogen separation device 710 separates hydrogen from the COG purified in the COG purification plant 170.
  • the separated hydrogen is supplied to the carbon dioxide regeneration device 420.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Inorganic Chemistry (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Manufacture Of Iron (AREA)

Abstract

One embodiment of the present invention relates to a molten iron manufacturing apparatus. The molten iron manufacturing apparatus produces molten iron and generates by-product gas. The molten iron manufacturing apparatus comprises: a coke furnace wherein coke is produced and COG is generated; a gas mixing device which mixes the by-product gas and the COG for generating mixed gas; a mixed gas reforming device which reforms the mixed gas to generate reducing gas; and an iron ore reduction device which receives the reducing gas and reduces iron ore.

Description

이산화탄소 발생량을 저감하는 용철 제조 장치Apparatus for manufacturing molten iron that reduces carbon dioxide generation

본 발명은 용철 제조 장치에 관한 것으로서, 더 상세하게는 용철 제조 공정에서 이산화탄소 발생량을 줄이고 수소, 액체연료 및 전기 에너지를 생산할 수 있는 용철 제조 장치에 관한 것이다.The present invention relates to a molten iron manufacturing apparatus, and more particularly, to a molten iron manufacturing apparatus that can reduce the amount of carbon dioxide generated in the molten iron manufacturing process and produce hydrogen, liquid fuel and electrical energy.

용철 제조 공정에서 발생하는 부생가스를 그대로 대기 중으로 방출하면 환경에 유해할 뿐 아니라 재활용할 수 있는 성분을 폐기하는 것으로서 자원 및 에너지 효율 측면에서도 바람직하지 않다.If the by-product gas generated in the molten iron manufacturing process is released into the atmosphere as it is, it is not only harmful to the environment but also to dispose of recyclable components, which is undesirable in terms of resources and energy efficiency.

또한 부생가스에 포함된 이산화탄소는 기후 변화의 원인으로 지목되고 있으며 이를 회수하여 재활용할 필요가 있다.In addition, carbon dioxide contained in by-product gas is considered to be the cause of climate change, and it needs to be recovered and recycled.

본 발명은 제철 공정에서 발생한 이산화탄소를 재활용하여 용철 제조 공정에서 이산화탄소 발생량을 줄이는 용철 제조 장치를 제공하고자 한다.The present invention is to provide a molten iron manufacturing apparatus for reducing the amount of carbon dioxide generated in the molten iron manufacturing process by recycling the carbon dioxide generated in the steelmaking process.

또한, 본 발명은 용철 제조 공정에서 액체연료 및 전기 에너지를 생산할 수 있는 용철 제조 장치를 제공하고자 한다.In addition, the present invention is to provide a molten iron manufacturing apparatus capable of producing liquid fuel and electrical energy in the molten iron manufacturing process.

본 발명의 일 실시예에 따른 용철 제조 장치는, 용철을 생산하고 부생가스를 발생시키는 용철 제조로, 코크스를 생산하고 COG를 발생시키는 코크스로, 상기 부생가스와 상기 COG를 혼합하여 혼합가스를 발생시키는 가스 혼합 장치, 상기 혼합가스를 개질하여 환원가스를 발생시키는 혼합가스 개질 장치 및 상기 환원가스를 공급받아 철광석을 환원하는 철광석 환원 장치를 포함할 수 있다.An apparatus for manufacturing molten iron according to an embodiment of the present invention is molten iron for producing molten iron and generating by-product gas. The apparatus for producing molten iron is coke, which produces coke and generates COG. The mixed gas is mixed with the COG to generate a mixed gas. And a mixed gas reforming apparatus for reforming the mixed gas to generate a reducing gas, and an iron ore reducing apparatus for reducing the iron ore by receiving the reducing gas.

또한, 상기 용철 제조 장치는 부생가스 정제 설비를 더 포함하고, 상기 부생가스 정제 설비는 상기 제철 부생가스 중 유해 성분을 정제한 후 상기 제철 부생가스를 상기 가스 혼합 장치에 공급할 수 있다. 상기 부생가스 정제 설비는 사이클론, 필터 및 스크러버 중 적어도 하나를 포함할 수 있다. 또한, 상기 부생가스 정제 설비는 열 교환 장치를 더 포함할 수 있다.In addition, the molten iron manufacturing apparatus further includes a by-product gas purification equipment, the by-product gas purification equipment may supply the steel production by-product gas to the gas mixing device after purifying the harmful components in the steel production by-product. The off-gas purification plant may include at least one of a cyclone, a filter and a scrubber. In addition, the by-product gas purification equipment may further include a heat exchange device.

상기 용철 제조 장치는 COG 정제 설비를 더 포함하고, 상기 COG 정제 설비는 상기 COG 중 유해 성분을 정제한 후 상기 COG를 상기 가스 혼합 장치에 공급할 수 있다. 상기 COG 정제 설비는 사이클론, 필터, 스크러버 및 불순물 정제 반응기 중 적어도 하나를 포함할 수 있다. 또한, 상기 COG 정제 설비는 열 교환 장치를 더 포함할 수 있다.The apparatus for manufacturing molten iron may further include a COG refining facility, and the COG refining facility may supply the COG to the gas mixing device after purifying harmful components in the COG. The COG purification plant may include at least one of a cyclone, a filter, a scrubber and an impurity purification reactor. In addition, the COG refining plant may further comprise a heat exchange device.

상기 용철 제조 장치는 타르 개질 반응기를 더 포함하고, 상기 타르 개질 반응기는 상기 COG 정제 설비에 연결되고, 정제되기 전 COG에서 분리된 타르를 개질할 수 있다.The apparatus for producing molten iron further includes a tar reforming reactor, which is connected to the COG refining plant and may reform tar separated from the COG before being purified.

상기 용철 제조 장치는 열교환기를 더 포함하고, 상기 열교환기는 용철 제조로에서 발생하는 열을 상기 혼합가스 개질 장치에 공급할 수 있다.The molten iron manufacturing apparatus may further include a heat exchanger, and the heat exchanger may supply heat generated in the molten iron manufacturing furnace to the mixed gas reformer.

상기 용철 제조 장치는 혼합가스 정제 설비를 더 포함하고, 상기 혼합가스 정제 설비는 상기 가스 혼합 장치와 상기 혼합가스 개질 장치 사이에 구비되고 상기 혼합가스를 정제하여 상기 혼합가스 개질 장치에 공급할 수 있다.The molten iron manufacturing apparatus may further include a mixed gas refinery, and the mixed gas refinery may be provided between the gas mixing device and the mixed gas reformer to purify the mixed gas and supply the mixed gas to the mixed gas reformer.

상기 용철 제조 장치는 제1 열교환기를 더 포함하고, 상기 제1 열교환기는 용철 제조로에서 발생하는 열을 상기 혼합가스 개질 장치에 공급할 수 있다.The molten iron manufacturing apparatus may further include a first heat exchanger, and the first heat exchanger may supply heat generated in the molten iron manufacturing furnace to the mixed gas reformer.

상기 용철 제조 장치는 수소 분리 장치 및 이산화탄소 재생 장치를 더 포함하고, 상기 수소 분리 장치는 상기 혼합가스 개질 장치에 연결되어 상기 환원가스에서 수소를 분리하며, 상기 이산화탄소 재생 장치는 상기 수소 분리 장치에서 공급받은 수소를 이산화탄소와 반응시킬 수 있다. 또한, 상기 용철 제조 장치는 물 분리 장치를 더 포함하고, 상기 물 분리 장치는, 상기 이산화탄소 재생 장치에 연결되며, 상기 이산화탄소 재생 장치에서 발생한 물을 분리 및 제거할 수 있다.The apparatus for manufacturing molten iron further includes a hydrogen separation device and a carbon dioxide regeneration device, the hydrogen separation device is connected to the mixed gas reformer to separate hydrogen from the reducing gas, and the carbon dioxide regeneration device is supplied from the hydrogen separation device. The hydrogen received can be reacted with carbon dioxide. In addition, the molten iron manufacturing apparatus further includes a water separation device, the water separation device is connected to the carbon dioxide regeneration device, it is possible to separate and remove the water generated in the carbon dioxide regeneration device.

상기 용철 제조 장치는 액체연료 생성 장치를 더 포함하고, 상기 액체연료 생성 장치는, 상기 혼합가스 개질 장치 장치에 연결되며, 상기 혼합가스 개질 장치로부터 환원가스를 공급받아 액체연료를 생성할 수 있다. 한편, 상기 액체연료 생성 장치에서 생성되는 액체연료는 메탄올, 디메틸에테르 및 하이드로 카본 중 적어도 하나를 포함할 수 있다. 상기 액체연료 생성 장치는 슬러리 반응기일 수 있다.The molten iron manufacturing apparatus further includes a liquid fuel generating device, the liquid fuel generating device is connected to the mixed gas reforming device, can be supplied with a reducing gas from the mixed gas reforming device to generate a liquid fuel. On the other hand, the liquid fuel produced by the liquid fuel generating device may include at least one of methanol, dimethyl ether and hydro carbon. The liquid fuel generating device may be a slurry reactor.

또한, 상기 용철 제조 장치는 제2 열교환기를 더 포함하고, 상기 제2 열교환기는 상기 액체연료 생성 장치에서 발생하는 열을 상기 혼합가스 개질 장치에 공급할 수 있다.The molten iron manufacturing apparatus may further include a second heat exchanger, and the second heat exchanger may supply heat generated from the liquid fuel generating device to the mixed gas reformer.

상기 용철 제조 장치는 압축기를 더 포함하고, 상기 압축기는, 상기 혼합가스 개질 장치와 상기 액체연료 생성 장치 사이에는 구비될 수 있다.The molten iron manufacturing apparatus further comprises a compressor, the compressor may be provided between the mixed gas reforming device and the liquid fuel generating device.

상기 용철 제조 장치는 발전 장치를 더 포함하고, 상기 발전 장치는 상기 액체연료 생성 장치에 연결되며 상기 액체연료 생성 장치로부터 가스를 공급받아 전기 에너지를 생산할 수 있다. 상기 발전 장치는 터빈일 수 있다.The apparatus for manufacturing molten iron further includes a power generation device, which is connected to the liquid fuel generating device and may receive electric gas from the liquid fuel generating device to produce electrical energy. The power generation device may be a turbine.

한편, 상기 가스 혼합 장치에서 발생되는 혼합가스는 수소(H2)와 일산화탄소(CO)를 포함하고, 상기 수소와 상기 일산화탄소의 몰 비율이 0.5 이상 2.0 이하일 수 있다. 또한, 상기 혼합가스는 이산화탄소(CO2)와 메탄(CH4)을 더 포함하고, 상기 이산화탄소와 상기 메탄의 몰 비율이 0.7 이상 4.0 이하일 수 있다.Meanwhile, the mixed gas generated in the gas mixing device may include hydrogen (H 2 ) and carbon monoxide (CO), and the molar ratio of the hydrogen and carbon monoxide may be 0.5 or more and 2.0 or less. The mixed gas may further include carbon dioxide (CO 2 ) and methane (CH 4 ), and the molar ratio of the carbon dioxide and the methane may be 0.7 or more and 4.0 or less.

상기 용철 제조 장치는 수소 분리 장치 및 이산화탄소 재생 장치를 더 포함하고, 상기 수소 분리 장치는 상기 COG 정제 설비에 연결되어 COG에서 수소를 분리하며, 상기 이산화탄소 재생 장치는 상기 수소 분리 장치에서 공급받은 수소를 이산화탄소와 반응시킬 수 있다. 또한, 상기 용철 제조 장치는 물 분리 장치를 더 포함하고, 상기 물 분리 장치는, 상기 이산화탄소 재생 장치에 연결되며, 상기 이산화탄소 재생 장치에서 발생한 물을 분리 및 제거할 수 있다.The apparatus for producing molten iron further includes a hydrogen separation device and a carbon dioxide regeneration device, wherein the hydrogen separation device is connected to the COG refining plant to separate hydrogen from COG, and the carbon dioxide regeneration device receives hydrogen supplied from the hydrogen separation device. Can react with carbon dioxide. In addition, the molten iron manufacturing apparatus further includes a water separation device, the water separation device is connected to the carbon dioxide regeneration device, it is possible to separate and remove the water generated in the carbon dioxide regeneration device.

본 발명의 다른 실시예에 따른 용철 제조 장치는, 철광석을 환원하여 환원철을 제조하는 제1 철광석 환원 장치, 상기 환원철을 공급받아 용철을 생산하고 부생가스를 발생시키는 용철 제조로, 코크스를 생산하고 COG를 발생시키는 코크스로, 상기 부생가스와 상기 COG를 혼합하여 혼합가스를 발생시키는 가스 혼합 장치, 상기 혼합가스를 개질하여 환원가스를 발생시키는 혼합가스 개질 장치 및 상기 환원가스를 공급받아 철광석을 환원하는 제2 철광석 환원 장치를 포함할 수 있다.The apparatus for manufacturing molten iron according to another embodiment of the present invention is a first iron ore reducing apparatus for reducing iron ore to produce reduced iron and molten iron for producing molten iron and generating byproduct gas by receiving the reduced iron. Coke to generate a, a gas mixing device for mixing the by-product gas and the COG to generate a mixed gas, a mixed gas reforming device for reforming the mixed gas to generate a reducing gas and reducing gas to reduce the iron ore It may include a second iron ore reduction device.

상기 용철 제조 장치는 부생가스 정제 설비를 더 포함하고, 상기 부생가스 정제 설비는 상기 제철 부생가스 중 유해 성분을 정제한 후 상기 제철 부생가스를 상기 가스 혼합 장치에 공급할 수 있다.The molten iron manufacturing apparatus may further include a by-product gas purification equipment, and the by-product gas purification equipment may supply the steel-by-product by-product gas to the gas mixing device after purifying harmful components in the steel production by-product.

상기 용철 제조 장치는 COG 정제 설비를 더 포함하고, 상기 COG 정제 설비는 상기 COG 중 유해 성분을 정제한 후 상기 COG를 상기 가스 혼합 장치에 공급할 수 있다.The apparatus for manufacturing molten iron may further include a COG refining facility, and the COG refining facility may supply the COG to the gas mixing device after purifying harmful components in the COG.

상기 용철 제조 장치는 상기 혼합가스 개질 장치와 상기 제2 철광석 환원 장치 사이에 가스 분배 장치를 구비하고, 상기 가스 분배 장치는 상기 혼합가스 개질 장치에서 발생한 환원가스 중 일부를 상기 제2 철광석 환원 장치에 공급하고 나머지를 상기 제1 철광석 환원 장치에 공급할 수 있다.The apparatus for manufacturing molten iron includes a gas distribution device between the mixed gas reformer and the second iron ore reduction device, and the gas distribution device sends a portion of the reducing gas generated in the mixed gas reformer to the second iron ore reduction device. And the rest to the first iron ore reduction apparatus.

한편, 상기 제1 철광석 환원 장치 또는 상기 제2 철광석 환원 장치는 유동 환원로일 수 있다.On the other hand, the first iron ore reduction device or the second iron ore reduction device may be a flow reducing furnace.

본 발명에 의하면, 용철 제조 공정에서 이산화탄소 발생량을 줄이는 한편 발생한 이산화탄소를 재활용할 수 있다.According to the present invention, it is possible to recycle the carbon dioxide generated while reducing the amount of carbon dioxide generated in the molten iron manufacturing process.

또한, 본 발명에 의하면, 용철 제조 공정에서 수소, 액체연료 및 전기 에너지를 생산할 수 있다.In addition, according to the present invention, it is possible to produce hydrogen, liquid fuel and electrical energy in the molten iron manufacturing process.

도1은 본 발명의 제1실시예에 따른 용철 제조 장치를 나타내는 개략도이다.1 is a schematic view showing a molten iron manufacturing apparatus according to a first embodiment of the present invention.

도2은 본 발명의 제2실시예에 따른 용철 제조 장치를 나타내는 개략도이다.2 is a schematic view showing a molten iron manufacturing apparatus according to a second embodiment of the present invention.

도3은 본 발명의 제3실시예에 따른 용철 제조 장치를 나타내는 개략도이다.3 is a schematic view showing a molten iron manufacturing apparatus according to a third embodiment of the present invention.

도4은 본 발명의 제4실시예에 따른 용철 제조 장치를 나타내는 개략도이다.4 is a schematic view showing a molten iron manufacturing apparatus according to a fourth embodiment of the present invention.

도5은 본 발명의 제5실시예에 따른 용철 제조 장치를 나타내는 개략도이다.5 is a schematic view showing a molten iron manufacturing apparatus according to a fifth embodiment of the present invention.

도6은 본 발명의 제6실시예에 따른 용철 제조 장치를 나타내는 개략도이다.6 is a schematic view showing a molten iron manufacturing apparatus according to a sixth embodiment of the present invention.

도7은 본 발명의 제7실시예에 따른 용철 제조 장치를 나타내는 개략도이다.7 is a schematic view showing a molten iron manufacturing apparatus according to a seventh embodiment of the present invention.

아래에서는 첨부한 도면을 참고하여, 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 용이하게 실시할 수 있도록 본 발명의 실시예를 상세히 설명한다. 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며 여기에서 설명하는 실시예에 한정되지 않는다. 본 발명을 명확하게 설명하기 위해서, 설명과 관계없는 부분은 도면에서 생략하였으며 명세서 전체에서 유사한 부분에 대해서는 유사한 도면 부호를 붙였다.Hereinafter, with reference to the accompanying drawings, it will be described embodiments of the present invention in detail so that those skilled in the art can easily practice. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In order to clearly describe the present invention, parts irrelevant to the description are omitted in the drawings, and like reference numerals designate like parts throughout the specification.

도1은 본 발명의 일 실시예에 따른 용철 제조 장치를 나타내는 개략도이다.1 is a schematic view showing a molten iron manufacturing apparatus according to an embodiment of the present invention.

도1을 참조하면, 본 발명의 일 실시예에 따른 용철 제조 장치는 용철 제조로(110), 코크스로(120), 가스 혼합 장치(130), 혼합가스 개질 장치(140), 철광석 환원 장치(150), 부생가스 정제 설비(160), COG 정제 설비(170), 제1 열교환기(180), 수증기 분리 장치(190) 및 발전장치(195)를 포함한다.1, the molten iron manufacturing apparatus according to an embodiment of the present invention is a molten iron manufacturing furnace 110, coke oven 120, gas mixing device 130, mixed gas reforming device 140, iron ore reduction device ( 150, a by-product gas purification facility 160, a COG purification facility 170, a first heat exchanger 180, a water vapor separation device 190, and a power generator 195.

용철 제조로(110)는 철 함유 원료와 탄소 함유 원료를 사용하여 용철 및 슬래그를 생산하고 부생가스를 발생시키는 장치다. 철 함유 원료는 철광석이고 탄소 함유 원료는 석탄일 수 있다.The molten iron manufacturing furnace 110 is an apparatus for producing molten iron and slag using iron-containing raw materials and carbon-containing raw materials and generating by-product gas. The iron-containing raw material may be iron ore and the carbon-containing raw material may be coal.

용철 제조로(110)에서 철 함유 원료 환원 반응은 주로 일산화탄소(CO)와 수소(H2)에 의해 이루어지며 아래 화학식(1)과 (2)로 각각 나타난다.In the molten iron manufacturing furnace 110, the iron-containing raw material reduction reaction mainly consists of carbon monoxide (CO) and hydrogen (H 2 ) and are represented by the following formulas (1) and (2), respectively.

Figure PCTKR2010006126-appb-I000001
(1)
Figure PCTKR2010006126-appb-I000001
(One)

Figure PCTKR2010006126-appb-I000002
(2)
Figure PCTKR2010006126-appb-I000002
(2)

부생가스는 350℃ 이상 고온에서 H2/CO 몰 비율이 0.5 이상일 수 있다.The by-product gas may have a H 2 / CO molar ratio of 0.5 or more at a high temperature of 350 ° C. or more.

부생가스는 부생가스 정제 설비(160)를 거쳐 가스 혼합 장치(130)에 공급된다. The by-product gas is supplied to the gas mixing device 130 via the by-product gas purification plant 160.

부생가스 정제 설비(160)는 용철 제조로(110)와 가스 혼합 장치(130) 사이에 구비되는데, 부생가스에 포함된 미립자 분진, 질소산화물(NOx), 황산화물(SOx), 수은 등 유해 성분을 제거하는 장치다. 부생가스 정제설비(160)는 사이클론, 필터나 스크러버(scrubber) 등을 구비하여 유해성분을 제거한다. The by-product gas purification facility 160 is provided between the molten iron manufacturing furnace 110 and the gas mixing device 130, and the harmful components such as particulate dust, nitrogen oxides (NOx), sulfur oxides (SOx), and mercury contained in the by-product gas. To remove the device. The by-product gas purification equipment 160 includes a cyclone, a filter, a scrubber, or the like to remove harmful components.

한편, 부생가스 정제 설비(160)는 부생가스의 열 효율을 유지하기 위해 열 교환 장치(미도시) 등을 포함할 수도 있다. 열 교환 장치는 고온인 부생가스에서 열을 회수하고, 정제된 부생가스가 가스 혼합 장치(130)에 공급되기 전에, 정제된 부생가스에 다시 열을 공급한다. On the other hand, the by-product gas purification equipment 160 may include a heat exchange device (not shown) or the like to maintain the thermal efficiency of the by-product gas. The heat exchanger recovers heat from the hot by-product gas and supplies heat to the purified by-product gas before the purified by-product gas is supplied to the gas mixing device 130.

정제된 부생가스가 고온 상태로 가스 혼합 장치(130)에 유입하므로 가스 혼합 장치(130)에 추가 공급해야 할 열량이 줄어든다. 결국, 용철 제조 장치 전체의 열 효율이 향상되고 이산화탄소 발생량이 줄어들 수 있다. 열 교환 장치는 사이클론, 필터나 스크러버 등과 결합된 형태로 존재할 수도 있다.Since the purified by-product gas flows into the gas mixing device 130 at a high temperature, the amount of heat to be additionally supplied to the gas mixing device 130 is reduced. As a result, the thermal efficiency of the entire molten iron manufacturing apparatus can be improved and the amount of carbon dioxide generated can be reduced. The heat exchanger may be present in the form of a combined cyclone, filter or scrubber.

코크스로(120)는 코크스를 생산하고 800℃ 이상의 COG(Coke oven gas, 코크스 오븐 가스)를 발생시킨다. 코크스는 용철 제조로(110)의 열원과 환원제로 사용될 수 있다. COG는 대부분 수소(58%), 메탄(26%), 일산화탄소(6%)로 이루어져 있다. COG는 제철 공정의 열원으로 사용될 수도 있고 환원가스, 수소, 메탄올 또는 환원철(Direct Reduced Iron) 제조에 사용될 수도 있다.The coke oven 120 produces coke and generates a coke oven gas (COG) of 800 ° C. or higher. Coke may be used as a heat source and reducing agent of the molten iron manufacturing furnace (110). COG is mostly composed of hydrogen (58%), methane (26%) and carbon monoxide (6%). COG may be used as a heat source for steelmaking processes and may be used for the production of reducing gas, hydrogen, methanol or direct reduced iron.

COG는 COG 정제 설비(170)를 거쳐 가스 혼합 장치(130)에 공급된다. COG 정제 설비(170)는 코크스로(120)와 가스 혼합 장치(130) 사이에 구비되는데, COG에 포함된 미립자 분진, 황 화합물(H2S), 암모니아(NH3), BTX, 수은 등 유해 성분을 제거하는 장치다. The COG is supplied to the gas mixing device 130 via the COG purification plant 170. The COG refining facility 170 is provided between the coke oven 120 and the gas mixing device 130. The COG refining facility 170 includes particulate dust, sulfur compounds (H 2 S), ammonia (NH 3 ), BTX, mercury, and the like contained in the COG. It is a device that removes ingredients.

정제된 COG에서 수소를 생산할 수 있으며, COG 성분은 후 공정에 연속적으로 사용될 수 있다. COG 정제 설비(170)는 사이클론, 필터, 스크러버(scrubber)나 불순물 정제 반응기 등을 구비하여 유해성분을 제거한다. Hydrogen can be produced from purified COG, and the COG component can be used continuously in subsequent processes. The COG purification plant 170 includes a cyclone, a filter, a scrubber or an impurity purification reactor to remove harmful components.

한편, COG 정제 설비(170)는 부생가스의 열 효율을 유지하기 위해 열 교환 장치(미도시) 등을 포함할 수도 있다. 이 경우 열 교환 장치는 고온인 COG에서 열을 회수하고, 정제된 COG가 가스 혼합 장치(130)에 공급되기 전에, 정제된 COG에 다시 열을 공급한다. On the other hand, the COG refining plant 170 may include a heat exchanger (not shown) or the like to maintain the thermal efficiency of the by-product gas. In this case, the heat exchanger recovers heat from the high temperature COG, and supplies heat back to the purified COG before the purified COG is supplied to the gas mixing device 130.

열 교환 장치는 사이클론, 필터나 스크러버 등과 결합된 상태로 존재할 수도 있다.The heat exchanger may be present in combination with a cyclone, a filter, a scrubber, or the like.

가스 혼합 장치(130)는 부생가스와 COG 성분을 혼합하여 혼합가스를 발생시키는 장치다. 혼합가스는 수소(H2), 일산화탄소(CO), 이산화탄소(CO2)와 메탄(CH4)을 포함한다. The gas mixing device 130 is a device that generates a mixed gas by mixing a by-product gas and a COG component. The mixed gas includes hydrogen (H 2 ), carbon monoxide (CO), carbon dioxide (CO 2 ) and methane (CH 4 ).

수소와 일산화탄소의 몰 비율은 0.5 이상 2.0 이하일 수 있고, 이산화탄소와 메탄의 몰 비율은 0.7 이상 4.0 이하일 수 있다. The molar ratio of hydrogen and carbon monoxide may be 0.5 or more and 2.0 or less, and the molar ratio of carbon dioxide and methane may be 0.7 and 4.0 or less .

혼합가스는 수증기(H2O)와 질소(N2)를 포함할 수도 있다. 혼합 가스에서 O/C 몰 비율은 1.0이상일 수 있다. The mixed gas may include water vapor (H 2 O) and nitrogen (N 2 ). The O / C molar ratio in the mixed gas may be at least 1.0.

이 비율은 부생가스 중 과량의 이산화탄소 또는 제철 공정에서 회수된 여분의 이산화탄소를 투입하여 조절할 수 있다. 이 비율은 부생가스 중 수증기 또는 여분의 수증기를 투입하여 조절할 수도 있다.This ratio can be controlled by adding excess carbon dioxide in by-product gas or excess carbon dioxide recovered from the steelmaking process. This ratio can also be adjusted by introducing steam or extra steam in the by-product gas.

혼합가스 개질 장치(140)는 혼합가스를 개질하여 환원가스를 발생시키는 장치다. 발생한 환원가스는 수소 및 일산화탄소를 포함한다. Mixed gas reforming unit 140 is a device for generating a reducing gas by reforming the mixed gas. The generated reducing gas includes hydrogen and carbon monoxide.

즉, 혼합가스 개질 장치(140)는 주로 메탄(CH4)과 이산화탄소(CO2)를 반응시켜 수소(H2)와 일산화탄소(CO)를 발생시키는 장치이며, 개질 반응은 아래 화학식(3) 내지 (6)으로 나타난다.That is, the mixed gas reformer 140 is a device for generating hydrogen (H 2 ) and carbon monoxide (CO) by mainly reacting methane (CH 4 ) and carbon dioxide (CO 2 ), and the reforming reaction is represented by Chemical Formulas 3 to 3 below. Appears as (6).

Figure PCTKR2010006126-appb-I000003
(3)
Figure PCTKR2010006126-appb-I000003
(3)

Figure PCTKR2010006126-appb-I000004
(4)
Figure PCTKR2010006126-appb-I000004
(4)

Figure PCTKR2010006126-appb-I000005
(5)
Figure PCTKR2010006126-appb-I000005
(5)

Figure PCTKR2010006126-appb-I000006
(6)
Figure PCTKR2010006126-appb-I000006
(6)

혼합가스 개질 장치(140)로 유동층 반응기를 사용할 수 있다. 유동층 반응기를 사용하면, 탄소 침적에 의한 촉매 비활성화를 방지할 수 있으며 생성되는 수소와 일산화탄소의 수율을 향상시킬 수도 있다.Fluidized bed reactors may be used as the mixed gas reformer 140. Using a fluidized bed reactor can prevent catalyst deactivation by carbon deposition and improve the yield of hydrogen and carbon monoxide produced.

용철 제조로(110)와 혼합가스 개질 장치(140) 사이에 제1 열교환기(180)를 구비할 수 있다. 제1 열교환기(180)는 용철 제조로(110)에서 발생하는 열을 혼합가스 개질 장치(120)에 공급한다.A first heat exchanger 180 may be provided between the molten iron manufacturing furnace 110 and the mixed gas reformer 140. The first heat exchanger 180 supplies the heat generated from the molten iron manufacturing furnace 110 to the mixed gas reformer 120.

철광석 환원 장치(150)는 혼합가스 개질 장치(140)로부터 환원가스를 공급받아 철광석을 환원하여 환원철을 생산하는 장치이다. 즉, 철광석 환원 장치(150) 내에서 환원가스가 환원제로 작용한다.Iron ore reduction device 150 is a device for reducing iron ore by receiving a reducing gas from the mixed gas reformer 140 to produce reduced iron. That is, the reducing gas acts as a reducing agent in the iron ore reduction apparatus 150.

철광석 환원 장치(150)에 공급되는 철광석은 용철 제조로(110)에 공급되는 철광석보다 평균 입도가 작을 수 있다. 예를 들면, 평균 입도가 1㎜ 이하인 미분철광석 또는 극미분철광석을 철광석 환원 장치(150)에 공급할 수 있다.Iron ore supplied to the iron ore reduction device 150 may have a smaller average particle size than iron ore supplied to the molten iron manufacturing furnace (110). For example, fine iron ore having an average particle size of 1 mm or less can be supplied to the iron ore reduction device 150.

철광석 환원 장치(150)는 온도 700℃ 이상, 압력 1 bar 이상에서 작동할 수 있는 유동층 반응기일 수 있다. 예를 들면, 유동층 반응기는 버블링(bubbling), 난류(turbulent) 또는 라이저(riser) 형태일 수 있다. Iron ore reduction device 150 may be a fluidized bed reactor capable of operating at a temperature of 700 ℃ or more, pressure 1 bar or more. For example, the fluidized bed reactor may be in the form of bubbling, turbulent or riser.

극미분철광석이 하강하고 환원용 합성가스가 상승하는 역류(counter current)형 또는 스프레이(spray)형 유동층 반응기도 사용될 수 있다.Counter current type or spray type fluidized bed reactors in which the ultra fine iron ore descends and the reducing syngas rises may also be used.

반응기 여러 개를 병렬 또는 직렬로 연결하여 철광석의 체류 시간을 연장함으로써 환원철의 철 함량을 조절하거나 환원철의 환원율을 높일 수도 있다.By connecting several reactors in parallel or in series to extend the residence time of iron ore, it is possible to control the iron content of reduced iron or increase the reduction rate of reduced iron.

철광석 환원 장치(150)에서 생성된 환원철은 전로, 고로, 특히 전기로에 투입되어 철강 공정에서 이산화탄소를 줄이는 데 기여할 수 있다.The reduced iron produced in the iron ore reduction apparatus 150 may be put into a converter, blast furnace, in particular an electric furnace to contribute to reducing carbon dioxide in the steel process.

철광석 환원 장치(150)에는 수증기 분리 장치(190)가 연결될 수 있다. 수증기 분리 장치(190)는 철광석 환원 과정에서 발생한 수증기를 분리 및 제거하며, 열도 회수할 수 있다.The steam ore separation device 190 may be connected to the iron ore reduction device 150. The steam separator 190 separates and removes steam generated in the iron ore reduction process, and may recover heat.

발전 장치(195)는 수증기 분리 장치(190)에 연결되어 수증기 및 혼합가스를 공급받아서 전기 에너지를 생산한다. 생산된 전기 에너지는 용철 제조 장치를 구성하는 각 장치에 공급될 수 있다. 발전 장치(195)는 터빈일 수 있다.The power generation device 195 is connected to the water vapor separation device 190 to receive electric steam and mixed gas to produce electric energy. The produced electrical energy can be supplied to each device constituting the molten iron manufacturing device. The power generation device 195 may be a turbine.

도2는 본 발명의 제2실시예에 따른 용철 제조 장치를 나타내는 개략도이다.2 is a schematic view showing a molten iron manufacturing apparatus according to a second embodiment of the present invention.

도2를 참조하면, 본 발명의 제2실시예에 따른 용철 제조 장치의 기본 구성 요소는 제1실시예와 동일하나 타르 개질 반응기(210)를 추가로 구비하였다.2, the basic components of the apparatus for manufacturing molten iron according to the second embodiment of the present invention is the same as the first embodiment, but further provided with a tar reforming reactor 210.

타르 개질 반응기(210)는 COG 정제 과정에서 발생하는 타르를 개질하는 장치이다. 타르 개질 반응기(210)는 COG 정제 설비(170)와 함께 설치된다. 타르 개질 반응기(210)에서 타르가 개질되므로 COG는 이산화탄소와 수소의 함량이 증가된 상태로 가스 혼합 장치(130)로 유입될 수 있다.The tar reforming reactor 210 is a device for reforming tar generated during the COG purification process. The tar reforming reactor 210 is installed together with the COG purification plant 170. Since the tar is reformed in the tar reforming reactor 210, the COG may be introduced into the gas mixing device 130 in a state where the contents of carbon dioxide and hydrogen are increased.

도3은 본 발명의 제3실시예에 따른 용철 제조 장치를 나타내는 개략도이다.3 is a schematic view showing a molten iron manufacturing apparatus according to a third embodiment of the present invention.

도3을 참조하면, 본 발명의 제2실시예에 따른 용철 제조 장치의 기본 구성 요소는 제1실시예와 유사하나 부생가스와 COG가 가스 혼합 장치(130)에 함께 유입한 후 혼합가스 정제 설비(310)을 거쳐 가스 혼합 장치(140)에 유입한다.Referring to Figure 3, the basic components of the apparatus for producing molten iron according to the second embodiment of the present invention is similar to the first embodiment, but after the by-product gas and COG flows into the gas mixing device 130 together mixed gas purification equipment The gas is introduced into the gas mixing device 140 through the 310.

혼합가스 정제 설비(310)는 부생가스와 COG가 혼합된 혼합가스에서 고체 입자를 분리한다. 고체 입자는 주로 철광석, 석탄 잔류물로서 COG에서 나온 타르 잔류물과 함께 분리된다. 이렇게 분리된 고체 입자 및 타르 잔류물은 고온에서 브리켓이나 펠릿으로 만들어져 고로, 전로 또는 전기로에 투입될 수 있다.The mixed gas purification plant 310 separates the solid particles from the mixed gas in which the by-product gas and the COG are mixed. Solid particles are separated mainly with tar residues from COG as iron ore and coal residues. The solid particles and tar residues thus separated can be made into briquettes or pellets at high temperatures and introduced into a blast furnace, converter or electric furnace.

도4는 본 발명의 제4실시예에 따른 용철 제조 장치를 나타내는 개략도이다.Figure 4 is a schematic diagram showing a molten iron manufacturing apparatus according to a fourth embodiment of the present invention.

도4를 참조하면, 본 발명의 제4실시예에 따른 용철 제조 장치의 기본 구성 요소는 제3실시예와 유사하나 수소 분리 장치(410), 이산화탄소 재생 장치(420) 및 물 분리 장치(430)를 추가로 구비하였다.Referring to FIG. 4, the basic components of the apparatus for manufacturing molten iron according to the fourth embodiment of the present invention are similar to those of the third embodiment, but the hydrogen separation device 410, the carbon dioxide regeneration device 420, and the water separation device 430. Was further provided.

수소 분리 장치(410)는 혼합가스 개질 장치(140)에서 발생한 환원가스 중 수소를 분리하여 이산화탄소 재생 장치(420)에 공급한다.The hydrogen separation device 410 separates hydrogen from the reducing gas generated by the mixed gas reformer 140 and supplies the hydrogen to the carbon dioxide regeneration device 420.

이산화탄소 재생 장치(420)는 수소 분리 장치(410)에서 공급된 수소를 이산화탄소와 반응시켜 일산화탄소와 수증기를 발생시킨다. 반응식은 아래 화학식(7)로 나타난다.The carbon dioxide regeneration device 420 reacts the hydrogen supplied from the hydrogen separation device 410 with carbon dioxide to generate carbon monoxide and water vapor. The reaction scheme is represented by the following formula (7).

Figure PCTKR2010006126-appb-I000007
(7)
Figure PCTKR2010006126-appb-I000007
(7)

물 분리 장치(430)는 이산화탄소 재생 장치(420)에서 발생한 수증기를 분리 및 제거하는 장치이다. 결국, 일산화탄소가 환원가스에 더해져서 철광석 환원 장치(150)에 공급되므로 환원제비를 감축할 수 있다.The water separator 430 is a device for separating and removing water vapor generated from the carbon dioxide regeneration device 420. As a result, carbon monoxide is added to the reducing gas and supplied to the iron ore reduction device 150, thereby reducing the reducing agent ratio.

도5는 본 발명의 제5실시예에 따른 용철 제조 장치를 나타내는 개략도이다.5 is a schematic view showing a molten iron manufacturing apparatus according to a fifth embodiment of the present invention.

도5를 참조하면, 본 발명의 제5실시예에 따른 용철 제조 장치의 기본 구성 요소는 제3실시예와 유사하나 액체연료 생성 장치(510)를 추가로 구비하였다.Referring to FIG. 5, the basic components of the apparatus for manufacturing molten iron according to the fifth embodiment of the present invention are similar to those of the third embodiment, but further include a liquid fuel generating device 510.

액체연료 생성 장치(510)는 철광석 환원 장치(130)에 연결되어 혼합가스를 공급받아서 액체연료를 생성한다. The liquid fuel generating device 510 is connected to the iron ore reduction device 130 to generate a liquid fuel by receiving a mixed gas.

철광석 환원 장치(150)에서 발생한 혼합가스 중 수증기는 수증기 분리 장치(190)에서 분리 및 제거되고, 나머지 가스가 액체연료 생성 장치(510)에 공급된다. 나머지 가스가 액체연료 생성 장치(510)에 공급되기 전에 압축기(520)에서 압축될 수도 있다.Water vapor in the mixed gas generated in the iron ore reduction device 150 is separated and removed in the water vapor separation device 190, and the remaining gas is supplied to the liquid fuel generating device (510). The remaining gas may be compressed in the compressor 520 before being supplied to the liquid fuel generating device 510.

생성되는 액체연료는 메탄올이나 디메틸에테르, 하이드로 카본 등일 수 있다.The resulting liquid fuel may be methanol, dimethyl ether, hydro carbon, or the like.

메탄올은 일산화탄소(CO)의 수소화(hydrogenation) 반응, 이산화탄소(CO2)의 수소화 반응 및 수성가스 이동반응(water gas shift reaction)에 의해 생성된다. 각 반응은 아래 화학식(8) 내지 (10)로 표현된다.Methanol is produced by hydrogenation of carbon monoxide (CO), hydrogenation of carbon dioxide (CO 2 ), and water gas shift reaction. Each reaction is represented by the following formulas (8) to (10).

Figure PCTKR2010006126-appb-I000008
(8)
Figure PCTKR2010006126-appb-I000008
(8)

Figure PCTKR2010006126-appb-I000009
(9)
Figure PCTKR2010006126-appb-I000009
(9)

Figure PCTKR2010006126-appb-I000010
(10)
Figure PCTKR2010006126-appb-I000010
10

디메틸에테르는 메탄올에 의해 생성될 수 있으며 아래 화학식(11)로 표현된다.Dimethyl ether can be produced by methanol and is represented by the following formula (11).

Figure PCTKR2010006126-appb-I000011
(11)
Figure PCTKR2010006126-appb-I000011
(11)

액체연료 생성장치(510)로는 유동층 반응기의 하나인 슬러리 반응기를 사용함으로써 탄소 침적(carbon deposition)에 의한 촉매 비활성화를 방지할 수 있다.As the liquid fuel generator 510, catalyst deactivation due to carbon deposition can be prevented by using a slurry reactor, which is one of fluidized bed reactors.

슬러리 반응기는 촉매인 금속 고체상, 탄화수소의 액체상 왁스(High molecular weight liquid)와 이산화탄소, 일산화탄소 및 수소를 포함하는 부생가스로 이루어지며, 부생가스는 촉매와 반응하여 메탄올 등 액체연료를 생성한다.Slurry reactor is composed of metal solid phase catalyst, liquid molecular wax (high molecular weight liquid) of hydrocarbon and by-product gas containing carbon dioxide, carbon monoxide and hydrogen. By-product gas reacts with catalyst to produce liquid fuel such as methanol.

탄화수소의 액체상 왁스는 열과 물질을 전달하는 매개체이며 발열반응에 의해 발생한 열을 회수할 수 있도록 제2 열교환기(530)가 설치될 수 있다. The liquid wax of the hydrocarbon is a medium for transferring heat and substances, and a second heat exchanger 530 may be installed to recover heat generated by an exothermic reaction.

제2열교환기(530)는 액체연료 생성 장치(510)에서 발생하는 열을 회수하는 한편 혼합가스 개질 장치(140)에 공급되는 혼합가스에 열을 전달하는 장치이다. 제2열교환기(530)의 작동에 의해 열효율이 높아질 수 있다.The second heat exchanger 530 recovers heat generated by the liquid fuel generating device 510 and transfers heat to the mixed gas supplied to the mixed gas reformer 140. Thermal efficiency may be increased by the operation of the second heat exchanger 530.

한편, 액체연료 생성장치(510)의 구조는 슬러리 반응기로 한정되는 것은 아니며, 부생가스와 촉매층으로 이루어진 고정층 반응기도 사용될 수 있다.On the other hand, the structure of the liquid fuel generating device 510 is not limited to a slurry reactor, a fixed bed reactor consisting of by-product gas and a catalyst layer may also be used.

액체연료 생성 장치(510)에서 생성된 메탄올 등 액체연료와 물은 액체연료/물 분리기(540)에서 서로 분리되고, 발생한 혼합가스는 발전 장치(195)에 공급된다.Liquid fuel such as methanol generated in the liquid fuel generating device 510 and water are separated from each other in the liquid fuel / water separator 540, and the generated mixed gas is supplied to the power generator 195.

도6은 본 발명의 제6실시예에 따른 용철 제조 장치를 나타내는 개략도이다.6 is a schematic view showing a molten iron manufacturing apparatus according to a sixth embodiment of the present invention.

본 발명의 제6실시예에 따른 용철 제조 장치의 구성 요소 중 제1실시예와 동일하거나 유사한 것에 관한 설명은 생략한다.The description of the same or similar components as those in the first embodiment of the molten iron manufacturing apparatus according to the sixth embodiment of the present invention will be omitted.

제1 철광석 환원 장치(610)는 철광석을 환원하여 환원철을 제조하는 장치이다. 용철 제조로(620)는 환원철을 공급받아 용철을 생산한다.The first iron ore reducing device 610 is a device for reducing iron ore to produce reduced iron. The molten iron manufacturing furnace 620 receives molten iron and produces molten iron.

가스 분배 장치(630)는 혼합가스 개질 장치(140)에서 발생한 환원가스 중 일부를 제1 철광석 환원 장치(610)에 공급하고 나머지를 제2 철광석 환원 장치(640)에 공급한다. 제1 철광석 환원 장치(610) 또는 제2 철광석 환원 장치(640)는 유동 환원로일 수 있다.The gas distribution device 630 supplies a part of the reducing gas generated in the mixed gas reformer 140 to the first iron ore reduction device 610 and supplies the rest to the second iron ore reduction device 640. The first iron ore reducing device 610 or the second iron ore reducing device 640 may be a flow reducing furnace.

도7은 본 발명의 제7실시예에 따른 용철 제조 장치를 나타내는 개략도이다.7 is a schematic view showing a molten iron manufacturing apparatus according to a seventh embodiment of the present invention.

본 발명의 제7실시예에 따른 용철 제조 장치의 구성 요소 중 제1 및 제4실시예와 동일하거나 유사한 것에 관한 설명은 생략한다.The description of the same or similar components as those of the first and fourth embodiments among the components of the apparatus for manufacturing molten iron according to the seventh embodiment of the present invention will be omitted.

수소 분리 장치(710)는 COG 정제 설비(170)에서 정제된 COG에서 수소를 분리한다. 분리된 수소는 이산화탄소 재생 장치(420)에 공급된다.The hydrogen separation device 710 separates hydrogen from the COG purified in the COG purification plant 170. The separated hydrogen is supplied to the carbon dioxide regeneration device 420.

이상에서 본 발명의 실시예에 대하여 설명하였지만, 본 발명의 권리범위는 이에 한정되는 것이 아니고 특허청구범위와 발명의 상세한 설명 및 첨부한 도면의 범위 안에서 여러 가지로 변형하여 실시하는 것이 가능하고 이 또한 본 발명의 범위에 속하는 것은 당연하다.Although the embodiments of the present invention have been described above, the scope of the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it is within the scope of the present invention.

Claims (29)

용철을 생산하고 부생가스를 발생시키는 용철 제조로,By manufacturing molten iron that produces molten iron and generates by-product gas, 코크스를 생산하고 COG를 발생시키는 코크스로,Coke to produce coke and generate COG, 상기 부생가스와 상기 COG를 혼합하여 혼합가스를 발생시키는 가스 혼합 장치,A gas mixing device for mixing the by-product gas and the COG to generate a mixed gas, 상기 혼합가스를 개질하여 환원가스를 발생시키는 혼합가스 개질 장치 및A mixed gas reformer for reforming the mixed gas to generate a reducing gas; 상기 환원가스를 공급받아 철광석을 환원하는 철광석 환원 장치Iron ore reduction device for reducing the iron ore by receiving the reducing gas 를 포함하는 용철 제조 장치.Molten iron manufacturing apparatus comprising a. 제1항에서,In claim 1, 부생가스 정제 설비를 더 포함하고,Further comprising by-product gas purification equipment, 상기 부생가스 정제 설비는 상기 제철 부생가스 중 유해 성분을 정제한 후 상기 제철 부생가스를 상기 가스 혼합 장치에 공급하는 용철 제조 장치.The by-product gas purification equipment is a molten iron manufacturing apparatus for supplying the iron-based by-product gas to the gas mixing device after purifying the harmful components in the steel production by-product. 제2항에서,In claim 2, 상기 부생가스 정제 설비는 사이클론, 필터 및 스크러버 중 적어도 하나를 포함하는 용철 제조 장치.The by-product gas purification equipment is molten iron manufacturing apparatus comprising at least one of a cyclone, a filter and a scrubber. 제3항에서,In claim 3, 상기 부생가스 정제 설비는 열 교환 장치를 더 포함하는 용철 제조 장치.The by-product gas purification equipment further comprises a heat exchange device. 제1항에서,In claim 1, COG 정제 설비를 더 포함하고,Further includes a COG purification plant, 상기 COG 정제 설비는 상기 COG 중 유해 성분을 정제한 후 상기 COG를 상기 가스 혼합 장치에 공급하는 용철 제조 장치.The COG refining plant is a molten iron manufacturing apparatus for supplying the COG to the gas mixing device after purifying the harmful components of the COG. 제5항에서,In claim 5, 상기 COG 정제 설비는 사이클론, 필터, 스크러버 및 불순물 정제 반응기 중 적어도 하나를 포함하는 용철 제조 장치.The apparatus for producing molten iron, wherein the COG refinery includes at least one of a cyclone, a filter, a scrubber, and an impurity purification reactor. 제6항에서,In claim 6, 상기 COG 정제 설비는 열 교환 장치를 더 포함하는 용철 제조 장치.The COG refining plant further comprises a heat exchange device. 제5항 내지 제7항 중 어느 한 항에서,The method according to any one of claims 5 to 7, 타르 개질 반응기를 더 포함하고,Further includes a tar reforming reactor, 상기 타르 개질 반응기는 상기 COG 정제 설비에 연결되고, 정제되기 전 COG에서 분리된 타르를 개질하는 용철 제조 장치.The tar reforming reactor is connected to the COG refining plant and the molten iron manufacturing apparatus for reforming the tar separated from the COG before purification. 제1항에서,In claim 1, 열교환기를 더 포함하고,Further includes a heat exchanger, 상기 열교환기는 용철 제조로에서 발생하는 열을 상기 혼합가스 개질 장치에 공급하는 용철 제조 장치.The heat exchanger is molten iron manufacturing apparatus for supplying heat generated in the molten iron manufacturing furnace to the mixed gas reformer. 제1항에서,In claim 1, 혼합가스 정제 설비를 더 포함하고,Further comprising a mixed gas purification plant, 상기 혼합가스 정제 설비는 상기 가스 혼합 장치와 상기 혼합가스 개질 장치 사이에 구비되고 상기 혼합가스를 정제하여 상기 혼합가스 개질 장치에 공급하는 용철 제조 장치.The mixed gas refining apparatus is provided between the gas mixing device and the mixed gas reformer, and the molten iron manufacturing apparatus for supplying the mixed gas to the mixed gas reformer. 제10항에서,In claim 10, 제1 열교환기를 더 포함하고,Further comprising a first heat exchanger, 상기 제1 열교환기는 용철 제조로에서 발생하는 열을 상기 혼합가스 개질 장치에 공급하는 용철 제조 장치.The first heat exchanger is molten iron manufacturing apparatus for supplying heat generated in the molten iron manufacturing furnace to the mixed gas reformer. 제11항에서,In claim 11, 수소 분리 장치 및 이산화탄소 재생 장치를 더 포함하고,Further comprising a hydrogen separation device and a carbon dioxide regeneration device, 상기 수소 분리 장치는 상기 혼합가스 개질 장치에 연결되어 상기 환원가스에서 수소를 분리하며,The hydrogen separation device is connected to the mixed gas reformer to separate hydrogen from the reducing gas, 상기 이산화탄소 재생 장치는 상기 수소 분리 장치에서 공급받은 수소를 이산화탄소와 반응시키는 용철 제조 장치.The carbon dioxide regeneration device is a molten iron manufacturing apparatus for reacting the hydrogen supplied from the hydrogen separation device with carbon dioxide. 제12항에서,In claim 12, 물 분리 장치를 더 포함하고,Further includes a water separation device, 상기 물 분리 장치는, 상기 이산화탄소 재생 장치에 연결되며, 상기 이산화탄소 재생 장치에서 발생한 물을 분리 및 제거하는 용철 제조 장치.The water separator is connected to the carbon dioxide regeneration device, the molten iron manufacturing apparatus for separating and removing the water generated in the carbon dioxide regeneration device. 제11항에서,In claim 11, 액체연료 생성 장치를 더 포함하고,Further comprising a liquid fuel generating device, 상기 액체연료 생성 장치는, 상기 혼합가스 개질 장치 장치에 연결되며, 상기 혼합가스 개질 장치로부터 환원가스를 공급받아 액체연료를 생성하는 용철 제조 장치.The liquid fuel generating device is connected to the mixed gas reformer, the molten iron manufacturing apparatus for receiving a reducing gas from the mixed gas reformer to generate a liquid fuel. 제14항에서,The method of claim 14, 상기 액체연료 생성 장치에서 생성되는 액체연료는 메탄올, 디메틸에테르 및 하이드로 카본 중 적어도 하나를 포함하는 용철 제조 장치.Liquid fuel produced by the liquid fuel generating device is molten iron manufacturing apparatus comprising at least one of methanol, dimethyl ether and hydro carbon. 제14항에서,The method of claim 14, 상기 액체연료 생성 장치는 슬러리 반응기인 용철 제조 장치.The liquid fuel generating device is a molten iron manufacturing apparatus is a slurry reactor. 제14항에서,The method of claim 14, 제2 열교환기를 더 포함하고,Further comprising a second heat exchanger, 상기 제2 열교환기는 상기 액체연료 생성 장치에서 발생하는 열을 상기 혼합가스 개질 장치에 공급하는 용철 제조 장치.The second heat exchanger is molten iron manufacturing apparatus for supplying heat generated in the liquid fuel generating device to the mixed gas reformer. 제14항에서,The method of claim 14, 압축기를 더 포함하고,Further includes a compressor, 상기 압축기는, 상기 혼합가스 개질 장치와 상기 액체연료 생성 장치 사이에는 구비되는 용철 제조 장치.The compressor, molten iron manufacturing apparatus is provided between the mixed gas reforming device and the liquid fuel generating device. 제14항에서,The method of claim 14, 발전 장치를 더 포함하고,Further includes a power generation device, 상기 발전 장치는 상기 액체연료 생성 장치에 연결되며 상기 액체연료 생성 장치로부터 가스를 공급받아 전기 에너지를 생산하는 용철 제조 장치.The power generation device is connected to the liquid fuel generating device and the molten iron manufacturing apparatus for producing electrical energy by receiving gas from the liquid fuel generating device. 제19항에서,The method of claim 19, 상기 발전 장치는 터빈인 용철 제조 장치.The apparatus for producing molten iron, wherein the power generator is a turbine. 제1항에서,In claim 1, 상기 가스 혼합 장치에서 발생되는 혼합가스는 수소(H2)와 일산화탄소(CO)를 포함하고,The mixed gas generated in the gas mixing device includes hydrogen (H 2 ) and carbon monoxide (CO), 상기 수소와 상기 일산화탄소의 몰 비율이 0.5 이상 2.0 이하인 용철 제조 장치.The molten iron manufacturing apparatus whose molar ratio of the said hydrogen and said carbon monoxide is 0.5 or more and 2.0 or less. 제21항에서,The method of claim 21, 상기 혼합가스는 이산화탄소(CO2)와 메탄(CH4)을 더 포함하고,The mixed gas further includes carbon dioxide (CO 2 ) and methane (CH 4 ), 상기 이산화탄소와 상기 메탄의 몰 비율이 0.7 이상 4.0 이하인 용철 제조 장치.The molten iron manufacturing apparatus of the molar ratio of the said carbon dioxide and said methane is 0.7 or more and 4.0 or less. 제5항 내지 제7항 중 어느 한 항에서,The method according to any one of claims 5 to 7, 수소 분리 장치 및 이산화탄소 재생 장치를 더 포함하고,Further comprising a hydrogen separation device and a carbon dioxide regeneration device, 상기 수소 분리 장치는 상기 COG 정제 설비에 연결되어 COG에서 수소를 분리하며,The hydrogen separation device is connected to the COG purification plant to separate hydrogen from the COG, 상기 이산화탄소 재생 장치는 상기 수소 분리 장치에서 공급받은 수소를 이산화탄소와 반응시키는 용철 제조 장치.The carbon dioxide regeneration device is a molten iron manufacturing apparatus for reacting the hydrogen supplied from the hydrogen separation device with carbon dioxide. 제23항에서,The method of claim 23, 물 분리 장치를 더 포함하고,Further includes a water separation device, 상기 물 분리 장치는, 상기 이산화탄소 재생 장치에 연결되며, 상기 이산화탄소 재생 장치에서 발생한 물을 분리 및 제거하는 용철 제조 장치.The water separator is connected to the carbon dioxide regeneration device, the molten iron manufacturing apparatus for separating and removing the water generated in the carbon dioxide regeneration device. 철광석을 환원하여 환원철을 제조하는 제1 철광석 환원 장치,A first iron ore reduction apparatus for reducing iron ore to produce reduced iron; 상기 환원철을 공급받아 용철을 생산하고 부생가스를 발생시키는 용철 제조로,By receiving the reduced iron to produce molten iron and to produce by-product gas, 코크스를 생산하고 COG를 발생시키는 코크스로,Coke to produce coke and generate COG, 상기 부생가스와 상기 COG를 혼합하여 혼합가스를 발생시키는 가스 혼합 장치,A gas mixing device for mixing the by-product gas and the COG to generate a mixed gas, 상기 혼합가스를 개질하여 환원가스를 발생시키는 혼합가스 개질 장치 및A mixed gas reformer for reforming the mixed gas to generate a reducing gas; 상기 환원가스를 공급받아 철광석을 환원하는 제2 철광석 환원 장치Second iron ore reduction device for reducing the iron ore by receiving the reducing gas 를 포함하는 용철 제조 장치.Molten iron manufacturing apparatus comprising a. 제25항에서,The method of claim 25, 부생가스 정제 설비를 더 포함하고,Further comprising by-product gas purification equipment, 상기 부생가스 정제 설비는 상기 제철 부생가스 중 유해 성분을 정제한 후 상기 제철 부생가스를 상기 가스 혼합 장치에 공급하는 용철 제조 장치.The by-product gas purification equipment is a molten iron manufacturing apparatus for supplying the iron-based by-product gas to the gas mixing device after purifying the harmful components in the steel production by-product. 제25항에서,The method of claim 25, COG 정제 설비를 더 포함하고,Further includes a COG purification plant, 상기 COG 정제 설비는 상기 COG 중 유해 성분을 정제한 후 상기 COG를 상기 가스 혼합 장치에 공급하는 용철 제조 장치.The COG refining plant is a molten iron manufacturing apparatus for supplying the COG to the gas mixing device after purifying the harmful components of the COG. 제25항에서,The method of claim 25, 상기 혼합가스 개질 장치와 상기 제2 철광석 환원 장치 사이에 가스 분배 장치를 구비하고,A gas distribution device is provided between the mixed gas reformer and the second iron ore reduction device. 상기 가스 분배 장치는 상기 혼합가스 개질 장치에서 발생한 환원가스 중 일부를 상기 제2 철광석 환원 장치에 공급하고 나머지를 상기 제1 철광석 환원 장치에 공급하는 용철 제조 장치.The gas distribution device is a molten iron manufacturing apparatus for supplying a portion of the reducing gas generated in the mixed gas reformer to the second iron ore reduction device and the rest to the first iron ore reduction device. 제25항 내지 제28항 중 어느 한 항에서,The method according to any one of claims 25 to 28, 상기 제1 철광석 환원 장치 또는 상기 제2 철광석 환원 장치는 유동 환원로인 용철 제조 장치.The first iron ore reduction device or the second iron ore reduction device is molten iron manufacturing apparatus is a flow reducing furnace.
PCT/KR2010/006126 2010-01-18 2010-09-09 Molten iron manufacturing apparatus for reducing emissions of carbon dioxide Ceased WO2011087199A1 (en)

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