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WO2014030811A1 - Procédé et appareil de fixation de dioxyde de carbone - Google Patents

Procédé et appareil de fixation de dioxyde de carbone Download PDF

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Publication number
WO2014030811A1
WO2014030811A1 PCT/KR2012/011690 KR2012011690W WO2014030811A1 WO 2014030811 A1 WO2014030811 A1 WO 2014030811A1 KR 2012011690 W KR2012011690 W KR 2012011690W WO 2014030811 A1 WO2014030811 A1 WO 2014030811A1
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Prior art keywords
carbon dioxide
metal carbonate
carbonate
steel waste
strong acid
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English (en)
Korean (ko)
Inventor
이승문
이동조
정종헌
김기현
김성만
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Posco Holdings Inc
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Posco Co Ltd
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Priority to CN201280074029.3A priority Critical patent/CN104364195B/zh
Publication of WO2014030811A1 publication Critical patent/WO2014030811A1/fr
Anticipated expiration legal-status Critical
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00—Carbon; Compounds thereof
    • C01B32/50—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/62—Carbon oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18—Stationary reactors having moving elements inside
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/70—Chemical treatment, e.g. pH adjustment or oxidation
    • 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
    • C01B3/06—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents
    • C01B3/08—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents with metals
    • 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
    • C10K1/00—Purifying combustible gases containing carbon monoxide
    • C10K1/20—Purifying combustible gases containing carbon monoxide by treating with solids; Regenerating spent purifying masses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J7/00—Arrangement of devices for supplying chemicals to fire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2065—Ammonium hydroxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/30—Alkali metal compounds
    • B01D2251/304—Alkali metal compounds of sodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/604—Hydroxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/10—Inorganic absorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/10—Inorganic absorbents
    • B01D2252/103—Water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20738—Iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/502—Carbon monoxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/12—Methods and means for introducing reactants
    • B01D2259/126—Semi-solid reactants, e.g. slurries
    • 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
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/32—Direct CO2 mitigation
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • 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
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/20—Waste processing or separation

Definitions

  • the present invention relates to a method and apparatus for fixing carbon dioxide, and more particularly, to produce metal ions by reacting steel waste with strong acids to form metal ions, and then reacting them with alkaline wastewater with carbon dioxide to fix carbon dioxide. It is about.
  • Carbon dioxide generated in steel mills takes up a large portion, and in particular, more than 90% of carbon dioxide is generated in the entire integrated steelmaking process, and much research is being conducted to treat carbon dioxide.
  • the conventional carbon dioxide capture and storage had a problem of securing a storage space such as marine storage or underground storage in order to capture carbon dioxide and store the collected carbon dioxide.
  • the latter method is a method of separating and recovering carbon dioxide and using it as a raw material for methanol synthesis, or a method of separating and recovering carbon dioxide for ocean dumping or immobilization as a carbonate.
  • slag generated in the steelmaking process of steel mills include molten iron preliminary slag, converter slag, stainless slag, and electric furnace slag. These steelmaking slags are partially used as filling aggregates for cement, road and civil works, but the rest are used. Most of them are landfilled. However, various methods have been proposed to utilize slag, which is becoming increasingly difficult to secure landfills and has been limited as a method of utilization until now.
  • the present invention for solving the above problems is to form a carbonate by reacting carbon dioxide in the alkaline wastewater, and to replace the metal salt in the carbonate to fix the carbon dioxide and at the same time to provide a method for producing a metal carbonate.
  • a method for manufacturing steel waste Concentrating the steel waste; Dehydrating the concentrated steel waste; Separating hydrogen and precipitate formed by mixing and stirring the dehydrated steel waste and strong acid; Preparing a carbonate by injecting an exhaust gas containing alkaline wastewater and carbon dioxide into the separated precipitate, and then preparing a metal carbonate (FeCO 3 ) by a substitution reaction between the carbonate and the precipitate; And a carbon dioxide fixing method including drying the metal carbonate (FeCO 3 ).
  • the steel waste includes waste sludge or dust generated in the steelmaking process, and the precipitate includes FeCl 2 and FeCl 3 generated by the reaction of the steel waste with hydrochloric acid (HCl).
  • HCl hydrochloric acid
  • the alkaline wastewater may include one or more of NH 3 , CaO or NaOH generated in the steelmaking process, and the carbonate is one or more of HCO 3 ⁇ , CO 3 2 ⁇ or NH 2 CO 2 ⁇ .
  • the metal carbonate (FeCO 3 ) is formed by the reaction of iron ions (Fe 2+ ) generated by the precipitate with the carbonate, the iron waste is 40 ⁇ 60% by weight percent iron (total Fe) It is characterized by that.
  • concentrating the metal carbonate prior to the drying step; Dehydrating the concentrated metal carbonate may be further included.
  • the metal carbonate may be supplied to a blast furnace or a melt gasifier to be used as a core activator.
  • the metal carbonate supplied to the blast furnace or the melt gasifier is decomposed into iron oxide (FeO) and carbon dioxide, and the decomposed carbon dioxide is reacted with pulverized coal to be reduced. It is characterized by generating a gas.
  • the metal carbonate is characterized in that it is blown through the dust burner (dust burner) to the molten gasifier or blown into the blast furnace through the air vent.
  • the strong acid has a pH of 1 or less, and the pH of the alkaline wastewater is characterized in that 10 or more.
  • the exhaust gas containing carbon dioxide is at least one of blast furnace gas (BFG), FINEX off gas (FOG) or COG (Coke Oven Gas) generated in the steelmaking process, and the hydrogen is used as a reducing gas for a fluid reduction reactor. It features.
  • a concentrating device for concentrating steel waste Dehydration apparatus for dewatering the concentrated steel waste; A dissolving apparatus for reacting the dehydrated steel waste with a strong acid to produce hydrogen and metal salts; A mixing and stirring device for producing metal carbonate by reacting the metal salt with a flue gas containing carbon dioxide and alkaline wastewater; And it may be provided a carbon dioxide fixing device comprising a drying device for drying the metal carbonate.
  • the mixing stirrer includes one or more mats immersed in the mixing stirrer, and supplying the exhaust gas containing the metal salt and carbon dioxide to the alkaline wastewater.
  • the dewatering device is characterized in that the filter press (filter press), the drying device is connected to a suction device for sucking the metal carbonate precipitated in the mixing stirrer to the metal carbonate to the drying device It is characterized by the supply.
  • the suction device and the drying device may further include a concentrator for concentrating the metal carbonate and a dehydrator formed between the concentrator and the drying device for dehydrating the concentrated metal carbonate.
  • the dissolution device a strong acid storage tank for storing the strong acid; A melt cell in which the strong acid and the steel waste are dissolved; And it may include a stirrer for stirring the solution in the dissolution cell.
  • the dissolving device may further include a check valve for adjusting the amount of the strong acid, the dissolving device may further include a hydrogen storage tank for storing hydrogen generated by the reaction of the steel waste and strong acid.
  • a large amount of carbon dioxide generated in the steelmaking process can be removed at low cost by utilizing waste resources in the process.
  • neutralized metal carbonate can be prepared by injecting carbon ions and metal ions into the alkaline wastewater generated in the steelmaking process, and the core can be activated by utilizing the metal carbonate as a supporting agent.
  • FIG. 1 is a flow chart of the carbon dioxide fixing method of the embodiment according to the present invention.
  • Figure 2 is a block diagram of a carbon dioxide fixing device of the embodiment according to the present invention.
  • FIG. 3 illustrates in detail the dissolution device and mixing stirrer of the configuration of FIG.
  • Figure 4 schematically shows the appearance of the tuyere in a typical blast furnace.
  • the present invention relates to a carbon dioxide fixing method and apparatus for supplying a blast furnace or a FINEX melt gasifier to activate a core.
  • FIG. 1 illustrates a procedure of fixing carbon dioxide according to an embodiment of the present invention.
  • a method of fixing carbon dioxide using steel waste will be described with reference to FIG. 1.
  • the hydrogen is used as a reducing gas in a flow reduction reactor, etc.
  • the precipitate is used for the production of metal carbonate.
  • Waste sludge in the embodiment according to the present invention includes all sludge generated in the steelmaking process including the steelmaking and steelmaking processes.
  • the precipitate is FeCl 2 and FeCl 3 formed by the reaction of iron-containing waste sludge or dust with a strong acid such as hydrochloric acid (HCl).
  • the FeCl 2 and FeCl 3 are dissolved in water and present as Fe 2+ and Fe 3+ in the dissolution apparatus in which the precipitate is dissolved.
  • divalent iron becomes Fe 2+ when reacted with hydrochloric acid and Fe 3+ in the case of ferric trioxide (Fe 2 O 3 ).
  • the iron ions (Fe 2+ , Fe 3+ ) and hydrogen generated during the precipitation reaction is separated and the separated precipitate is reacted with carbonate.
  • the carbonate is made by mixing alkaline wastewater and carbon dioxide, and a metal carbonate (FeCO 3 ) is prepared by injecting a precipitate into the carbonate (S150).
  • a metal carbonate (FeCO 3 ) is dried (S180) in order to use the generated metal carbonate as a coagulant in a blast furnace or a melt gasification furnace.
  • the metal carbonate may be subjected to the concentration step (S160) and dehydration treatment step (S170).
  • FIG. 2 shows the configuration of the carbon dioxide fixing device of the embodiment according to the present invention, will be described below with reference to FIG.
  • steel waste which is a by-product of steel mills such as waste sludge or dust generated in the steelmaking process
  • these include metal salts such as Fe 2+ , Zn 2+ or Ag 2+ .
  • the carbonate to the Fe 2+ to produce the FeCO 3 is a metal carbonate.
  • the steel waste 20 of the steel mill 10 such as waste sludge or dust, contains iron oxides such as Fe 2 O 3 , Fe 3 O 4 or FeO, which react with strong acids, in particular hydrochloric acid, to form iron chlorides. .
  • the steelmaking waste 20 is concentrated and dehydrated using the concentrator 100 and the dehydration apparatus 110. At this time, it is not necessary to remove all the moisture of the steel waste, and the embodiment according to the present invention used a filter press (filter press) as a dehydration treatment apparatus. This removes the water to such an extent that the reaction with the strong acid occurs well. Since the filter press is obvious to those skilled in the art to which the present invention pertains, a detailed description thereof will be omitted.
  • the formation of the iron chloride is made by the following reaction formula. This is the same as the dissociation reaction of Fe 2 O 3 , Fe 3 O 4 , FeO contained in the steel waste.
  • a strong acid hydrochloric acid (HCl) in the melting apparatus 200 together with the steelmaking waste 20.
  • the pH of hydrochloric acid is 1 or less.
  • the steel waste 20 such as the waste sludge or dust is used having a size of 100 ⁇ m or less. If the particle size of the steel waste 20 is greater than 100 ⁇ m, the reaction surface area of the iron oxide is not sufficient, so that the dissociation reaction is not performed well. Therefore, the size of the steel waste 20 in the embodiment according to the present invention is 100 ⁇ m or less. It is limited to. However, the particle size of the steel waste may vary depending on the generated environment, and may be 30 ⁇ m or less when generated in a FINEX melt gasifier.
  • FeCl 2 and FeCl 3 formed by the above scheme are easily dissolved by water and are present as Fe 2+ and Fe 3+ .
  • hydrogen gas may be generated, and the additionally generated high purity hydrogen gas may be used as a reducing gas in a flow reduction reactor of the Finex steelmaking process.
  • iron content (total Fe) in the steel waste is used as 40 to 60 weight percent (wt%). If the iron content is lower than 40%, the amount to be discarded is greater than the amount of the supporting agent to be described later, and the production efficiency of the supporting agent is lowered. In addition, if the iron content exceeds 60%, the yield of the coagulant increases, but if the iron content exceeds 60%, it will be useful in the steelmaking process in the embodiment according to the present invention in the iron content in the steel waste to the above range It is limited.
  • FeCl 2 and FeCl 3 prepared as described above are dissolved in water and present in the form of metal ions such as Fe 2+ and Fe 3+ , and reacted with carbonate to prepare metal carbonate (FeCO 3 ).
  • the production of carbonate in the embodiment according to the present invention is accomplished by reacting carbon dioxide with alkaline wastewater discarded in the steelmaking process. That is, NH 3 , CaO or NaOH is included in the waste water discarded in the steelmaking process, at least one of them and carbon dioxide reacts to form various kinds of carbonates.
  • NH 3 , CaO or NaOH is included in the waste water discarded in the steelmaking process, at least one of them and carbon dioxide reacts to form various kinds of carbonates.
  • reaction scheme for NH 3 is as follows. To by the reaction formula HCO 3 - it generates a carbonate, such as -, CO 3 2-, NH 2 CO 2.
  • Exhaust gas containing carbon dioxide in the embodiment according to the present invention includes one or more of blast furnace gas (BFG), FINEX off gas (FOG) or COG (Coke Oven Gas) generated in the steelmaking process.
  • BFG blast furnace gas
  • FINEX off gas FINEX off gas
  • COG Coke Oven Gas
  • the pH of said alkaline wastewater should just be 10 or more. If less than 10, the ability to fix the carbon dioxide is lowered. That is, since the neutralization capacity of carbon dioxide, which is an acidic gas, is lowered, the embodiment of the present invention limits the pH of the alkaline wastewater to 10 or more.
  • the pH of the alkaline wastewater is 11
  • the pH of the alkaline wastewater is neutralized to about 7-8 by reacting with the acidic gas CO 2 .
  • the higher the pH of the alkaline wastewater the greater the chance that the reaction with CO 2 may proceed actively. Therefore, in the embodiment according to the present invention, the pH of the alkaline wastewater is limited to 10 or more.
  • Carbonate formed by the above reaction (HCO 3 - , CO 3 2 - , NH 2 CO 2 - ) Fe in the mixing stirrer 300 2 + To form metal carbonates.
  • carbon dioxide and alkali wastewater which are by-products of the steelmaking process of the steel mill 10 are supplied to prepare carbonates from these reactions, and the carbonates and iron ions react to form metal carbonates (FeCO 3 ). do.
  • reaction formula is as in the following formula.
  • the carbonate is delivered from the interface to precipitate a thermodynamically stable metal salt (FeCO 3 ), and CO 2 is fixed.
  • a thermodynamically stable metal salt FeCO 3
  • the metal carbonate is precipitated in the mixing stirrer 300.
  • the metal carbonate is dried using a drying apparatus 400 to utilize the metal carbonate as a supporting agent.
  • the concentrator 370 and the dehydrator 390 are dried before drying. By using the concentration and dehydration process can be made easy to dry.
  • the fuel retardant is supplied to the pulverized coal blowing lance (PCI) of the blast furnace 600 and the melt gasifier 500 to promote complete combustion in the combustion zone and to prevent the generation of unburned carbon dust.
  • the fuel retardant may be used for the activation operation of the core portion as a core activator, in particular, it may be used for the early rise of the core portion to increase the operation degree early after the wall repair.
  • the blast furnace operation is injecting PCI through the blast furnace vents to enable the operation of high lead ships by reducing the use of expensive coke and by filling iron ore into the reduced coke space.
  • metal salts of blast furnace sludge and steel dust which are waste materials for 2 Immobilized FeCO 3 Injected by adding together, FeCO at 400 ⁇ 550 °C 3 FeO and CO 2 Decompose into
  • the generated CO 2 reacts with pulverized coal in the vicinity of a raceway to perform the following reaction.
  • the temperature at this time is about 950 degreeC-2200 degreeC, and a reaction formula is as follows.
  • FeCO 3 can be reused by blowing into the melt gasifier through a dust burner in the upper portion of the melt gasifier.
  • the dust burner supplies additional oxygen in addition to the oxygen required for dust combustion in order to prevent a temperature drop in the melt gasifier.
  • additional oxygen By supplying additional oxygen, a portion of the reducing gas formed in the dome portion of the melt gasification furnace is burned to prevent the temperature drop.
  • Figure 3 illustrates a carbon dioxide fixing device in an embodiment according to the present invention, including a dissolving device and a mixing stirring device.
  • the steel waste such as waste sludge or dust, which is a by-product generated in the steelmaking process, is concentrated by the concentrator 100, and the concentrated steel waste is dehydrated by the dehydration treatment apparatus 110 to make steel waste. Remove moisture.
  • the dehydrated steel waste is transferred to the dissolution cell 230 of the dissolution apparatus 200 so that the strong acid solution stored in the strong acid storage tank 210 is moved to the dissolution cell 230 by adjusting the check valve 220.
  • the stirrer 240 When mixed and stirred with the stirrer 240, metal salts are generated.
  • the metal salts are FeCl 2 and FeCl 3 , the metal salt is dissolved in water is present in the state of Fe 2 + , Fe 3 + to form a precipitate 235.
  • hydrogen may be generated at the same time as the formation of the metal salt, and since the hydrogen is high purity, the hydrogen is stored in the hydrogen storage tank 250 and used to reduce iron ore by hydrogen gas.
  • the metal salt is a metal ion through the injection pipe 310 is introduced into the mixing and stirring device 300, in particular, Fe 2 + is reacted with the carbonate to form a metal carbonate (337).
  • the carbonate is formed by a reaction of an exhaust gas containing carbon dioxide injected from an external carbon dioxide injection tube 320 and an alkaline wastewater 330 stored in a wastewater storage tank 335, wherein the exhaust gas and the alkaline wastewater 330 are mixed with each other. The reaction takes place in the stirring apparatus 300.
  • the Fe 2 + is injected into the mixing stirrer 300 together with the exhaust gas containing the carbon dioxide, the injected iron ions (Fe 2 + ) and exhaust gas is a plurality of gas diffusion hose ( It is uniformly fed and distributed into the alkaline wastewater 335 through one or more mats 340 with a gas diffuser hose.
  • Carbon dioxide uniformly dispersed from the mat 340 is NH present in the alkaline wastewater 330. 3 , CaO Or react with NaOH to 3 - , CO 3 2 - , NH 2 CO 2 - Forms carbonates such as At this time, by checking the pH with the pH electrode 350 to maintain the pH in the mixing stirring device 300 to 10 or more.
  • a metal carbonate (FeCO 3) (337) is formed.
  • the metal carbonate 337 sinks to the bottom of the mixing stirrer 300 as time passes and is present as a precipitate.
  • the metal carbonate 337 may be used as a coagulant in the blast furnace 600 or the melt gasifier 500 through the metal carbonate injection tube 420, in the embodiment according to the present invention, the metal carbonate 337 is dried. You have to.
  • the metal carbonate 337 may be subjected to a concentration and dehydration step before drying. That is, in FIG. 3, the suction device 360 sucks the precipitated metal carbonate using the suction device 360 to supply the metal carbonate 337 to the drying device 400, and then the drying device 400 through the metal carbonate transfer pipe 365.
  • the drying apparatus 400 before the supply to the drying apparatus 400 may be concentrated and dewatered to improve the production efficiency of the supporting agent and then supplied to the drying apparatus 400.
  • the drying is not enough to remove the moisture, but enough to be supplied to the dust burner 520 of the blast furnace 600 or the melting gasifier 500 to be used as a supporting agent.
  • FIG. 4 schematically illustrates the shape of the tuyere 620 in the blast furnace 600.
  • the tuyere 620 is formed through the blast furnace furnace wall 610, and a blow pipe 640 is formed.
  • the metal carbonate is added and injected together.
  • the metal carbonate 337 causes a decomposition reaction near the combustion zone 650 by high temperature hot air, and FeO generated by the decomposition reaction is reduced to Fe by a direct reduction method.

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PCT/KR2012/011690 2012-08-21 2012-12-28 Procédé et appareil de fixation de dioxyde de carbone Ceased WO2014030811A1 (fr)

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WO2016041672A1 (fr) * 2014-09-19 2016-03-24 Vito Nv Procédé de synthèse d'hydrogène
CN107262006A (zh) * 2017-08-16 2017-10-20 林江梅 一种自动定量加溶液进行化学反应并收集成品的化工设备

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CA2899051C (fr) * 2015-07-31 2017-07-11 Blue Carbon Solutions Inc Procede et methode d'amelioration de la sequestration du carbone atmospherique a l'aide de la fertilisation du fer oceanique, et methode de calcul de la capture de carbone nette al'aide desdits procede et methode
CN115672950B (zh) * 2022-09-20 2023-05-12 原初科技（北京）有限公司 一种钢渣固碳装置及其使用方法
CN116592356B (zh) * 2023-06-05 2024-01-23 中节能兆盛环保有限公司 一种垃圾焚烧炉进料口滤液深脱水装置
CN118954880B (zh) * 2024-10-19 2025-12-12 北京林业大学 一种基于芬顿铁泥厌氧消化提纯沼气的系统和方法

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JPH11192416A (ja) * 1997-12-29 1999-07-21 Kawasaki Heavy Ind Ltd 二酸化炭素の固定化方法
JP2004261658A (ja) * 2003-02-26 2004-09-24 Tokyo Electric Power Co Inc:The 燃焼排ガス中の二酸化炭素の吸収固定化方法
KR20060023206A (ko) * 2004-09-09 2006-03-14 주식회사 포스코 이산화탄소의 고정화 방법
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016041672A1 (fr) * 2014-09-19 2016-03-24 Vito Nv Procédé de synthèse d'hydrogène
CN107262006A (zh) * 2017-08-16 2017-10-20 林江梅 一种自动定量加溶液进行化学反应并收集成品的化工设备

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