JP2009045542A - Garbage disposal method - Google Patents

Abstract

It is not necessary to clean the reformed gas. Moreover, there is no problem of boiler corrosion, and high-efficiency power generation can be performed with peace of mind.
SOLUTION: A gasification process in which waste crushed in a pretreatment process is indirectly heated in a substantially air-blocked state to be decomposed into a pyrolysis gas and a residue, and an oxidant gas and gasification composed of water vapor and oxygen or air. The pyrolysis gas obtained in the process is introduced, the combustible component in the pyrolysis gas is reacted with oxygen in the oxidant gas, and the higher hydrocarbons in the pyrolysis gas are modified at a high temperature of 900 to 1200 ° C. A gas reforming process for converting to a gas, a gas cooling process for rapidly cooling the reformed gas obtained in the gas reforming process to 200 to 350 ° C., and a sodium-based desalting agent for hydrogen chloride gas contained in the reformed gas The process includes a dust removal and hydrogen chloride removal process that is removed by the above process, and a reformed gas fired power generation process in which high temperature gas (200 to 350 ° C.) from which hydrogen chloride has been removed is fired with a reformed gas fired boiler to generate power.
[Selection] Figure 1

Description

  The present invention relates to a waste treatment method that not only does not require the cleaning of the reformed gas, but also has no problem of boiler corrosion and can generate power efficiently with a sense of security.

  Conventionally, a pyrolysis process in which various wastes including organic matter such as municipal waste and waste plastics are indirectly heated in a state of substantially blocking air, thereby decomposing them into pyrolysis gas and solid residue, Air, oxygen-enriched air or oxygen and other oxidant gas and the pyrolysis gas obtained in the pyrolysis step are introduced, and between the combustible components contained in the pyrolysis gas and oxygen in the oxidant gas Obtained in the gas reforming process in which the reaction is caused in order to convert the higher hydrocarbons in the pyrolysis gas into lower hydrocarbons, the gas cooling process for rapidly cooling the gas obtained in the gas reforming process, and the gas cooling process. A waste treatment method (for example, refer to Patent Document 1) is proposed, which includes a gas purification step of introducing a generated gas and purifying dust and harmful components contained in the gas. In the gasification reforming system, Hydrogen chloride gas contained in quality gas it is common to remove a gas cleaning device.

  In this case, since the cleaning gas is generally cleaned by the cleaning liquid, the temperature is lowered to around room temperature. When BTG power generation (reformed gas-fired power generation) is performed using this cleaning gas, it is necessary to raise the temperature of the cleaning gas again, resulting in poor power generation efficiency.

  On the other hand, when reformed gas-fired power generation is performed at a high temperature without going through a gas scrubber, harmful gas chloride is contained in the gas, which causes boiler corrosion and is conventionally used. There wasn't.

Further, when gas cleaning is performed, a waste liquid treatment facility for treating the waste liquid is required, so that there is a problem that extra site and running costs are required.
JP 2004-75849 A

  The present invention has been made in order to solve the above-described problems, and the object of the present invention is not to eliminate the need for cleaning of the reformed gas, and there is no problem of boiler corrosion. The object is to provide a waste disposal method capable of efficient power generation.

  In the waste treatment method according to the first aspect of the present invention, a pretreatment process for introducing and crushing waste containing organic substances, and a waste crushed in the pretreatment process are introduced, and the air is substantially shut off. Indirect heating introduces a gasification process that decomposes into a pyrolysis gas and a solid residue, an oxidant gas composed of water vapor and oxygen or air, and a pyrolysis gas obtained in the gasification process, Combustible components contained in the cracked gas are reacted with oxygen in the oxidant gas, and the higher hydrocarbons in the pyrolyzed gas are composed of carbon monoxide, carbon dioxide, and hydrogen at a high temperature of 900 to 1200 ° C. A gas reforming step for converting to a reformed gas, a gas cooling step for rapidly cooling the reformed gas obtained in the gas reforming step to 200 to 350 ° C., and a gas obtained in the gas cooling step are introduced into the gas. Sodium chloride desalination of hydrogen chloride gas contained in A dust removal and hydrogen chloride removal process removed by the above, a reformed gas fired power generation process in which clean high-temperature gas (200 to 350 ° C) obtained in the dust removal and hydrogen chloride removal process is fired with a reformed gas fired boiler, It is characterized by comprising.

  In the waste treatment method according to the second aspect of the present invention, a pretreatment process for introducing and crushing waste containing organic substances, and a waste crushed in the pretreatment process are introduced, and the air is substantially shut off. Indirect heating introduces a gasification process that decomposes into a pyrolysis gas and a solid residue, an oxidant gas composed of water vapor and oxygen or air, and a pyrolysis gas obtained in the gasification process, Combustible components contained in the cracked gas are reacted with oxygen in the oxidant gas, and the higher hydrocarbons in the pyrolyzed gas are composed of carbon monoxide, carbon dioxide, and hydrogen at a high temperature of 900 to 1200 ° C. A gas reforming step for converting to a reformed gas, a gas cooling step for rapidly cooling the reformed gas obtained in the gas reforming step to 200 to 350 ° C., and a gas obtained in the gas cooling step are introduced into the gas. Sodium chloride desalination of hydrogen chloride gas contained in A dust removal and hydrogen chloride removal process removed by the above, a reformed gas fired power generation process in which clean high-temperature gas (200 to 350 ° C) obtained in the dust removal and hydrogen chloride removal process is fired with a reformed gas fired boiler, The boiler exhaust gas primary utilization process applies all or part of the exhaust gas discharged from the reformed gas-fired boiler for indirect heating of the pyrolysis drum in the gasification process.

  According to a third aspect of the present invention, there is provided a waste treatment method comprising: a pretreatment step for introducing and crushing waste containing organic matter; a drying step for drying the waste crushed in the pretreatment step; and a drying step for drying. Gasification process that decomposes into pyrolysis gas and solid residue by indirect heating in a state where the generated waste is introduced and almost air is shut off, and oxidant gas and gas composed of water vapor and oxygen or air The pyrolysis gas obtained in the gasification step is introduced, the combustible component contained in the pyrolysis gas is reacted with oxygen in the oxidant gas, and the pyrolysis gas is heated at a high temperature of 900 to 1200 ° C. A gas reforming process for converting the higher hydrocarbons of the gas into a reformed gas composed of carbon monoxide, carbon dioxide and hydrogen; and a gas cooling process for rapidly cooling the reformed gas obtained in the gas reforming process to 200 to 350 ° C. Introducing the gas obtained in the gas cooling process A dust removal and hydrogen chloride removal process that removes hydrogen chloride gas contained in the gas with a sodium-based desalting agent, and a clean high-temperature gas (200 to 350 ° C) obtained in the dust removal and hydrogen chloride removal process is burned with reforming gas. A reformed gas fired power generation process in which power is generated using a boiler, and a boiler exhaust gas primary use process in which all or part of the exhaust gas discharged from the reformed gas fired boiler is used for indirect heating of the pyrolysis drum in the gasification process. It is characterized by comprising.

  According to a fourth aspect of the present invention, there is provided a waste treatment method including a pretreatment step of introducing and crushing waste containing organic matter, a drying step of drying the waste crushed in the pretreatment step, and drying in the drying step. Gasification process that decomposes into pyrolysis gas and solid residue by indirect heating in a state where the generated waste is introduced and almost air is shut off, and oxidant gas and gas composed of water vapor and oxygen or air The pyrolysis gas obtained in the gasification step is introduced, the combustible component contained in the pyrolysis gas is reacted with oxygen in the oxidant gas, and the pyrolysis gas is heated at a high temperature of 900 to 1200 ° C. A gas reforming process for converting the higher hydrocarbons of the gas into a reformed gas composed of carbon monoxide, carbon dioxide and hydrogen; and a gas cooling process for rapidly cooling the reformed gas obtained in the gas reforming process to 200 to 350 ° C. Introducing the gas obtained in the gas cooling process A dust removal and hydrogen chloride removal process that removes hydrogen chloride gas contained in the gas with a sodium-based desalting agent, and a clean high-temperature gas (200 to 350 ° C) obtained in the dust removal and hydrogen chloride removal process is burned with reforming gas. A reformed gas fired power generation process in which power is generated using a boiler, and a boiler exhaust gas primary use process in which all or part of the exhaust gas discharged from the reformed gas fired boiler is used for indirect heating of the pyrolysis drum in the gasification process. And a boiler exhaust gas secondary use process in which the boiler exhaust gas used in the pyrolysis drum of the gasification process is applied for indirect heating of the drying drum of the drying process.

  The waste treatment method according to the invention described in claim 5 is characterized in that, in claim 1 or 2, a denitration tower, a temperature reduction tower, a desulfurization bag filter, and a chimney are arranged on the downstream side of the reformed gas fired boiler. It is what.

  The waste treatment method according to the invention described in claim 6 is the waste treatment method according to claim 3 or 4, wherein a denitration tower, a temperature reduction tower, a desulfurization bag filter, and a chimney are arranged in the exhaust gas pipe for guiding the exhaust gas after heating the dryer. It is characterized by.

  A waste disposal method according to a seventh aspect of the invention is characterized in that, in the third or fourth aspect, a desulfurization bag filter and a chimney are arranged in an exhaust gas pipe that guides the exhaust gas after heating the dryer. .

  A waste treatment method according to an eighth aspect of the present invention is the waste treatment method according to any one of the first to fourth aspects, wherein the residue treatment system for treating the solid residue separated in the gasification furnace includes a separation tower, a carbide melt A gasification furnace, a slag water tank, a molten exhaust gas cooling tower, and an ash cooler; the combustible gas generated in the carbide melting gasification furnace is rapidly cooled to 200 to 350 ° C. in the molten exhaust gas cooling tower; It is characterized by being mixed in a quality gas.

  According to the present invention, the hydrogen chloride gas contained in the reformed gas reformed in the gas reforming step is removed by dry removal with a sodium-based desalting agent at 200 to 350 ° C., preferably 280 to 320 ° C. Since the reformed gas is washed and the reformed gas-fired power generation is performed using the clean reformed gas as the fuel for the boiler, the reformed gas-fired power generation can be efficiently performed without worrying about the corrosion of the boiler.

  In addition, in order to use the reformed gas as fuel for the gas engine, it is necessary to remove the tar content contained in the reformed gas by washing, but as described above, when used as boiler fuel, Since gas cleaning, a gas holder, and the like are not required, the installation area and running cost can be reduced accordingly.

  Further, in the present invention, all or part of the high-temperature exhaust gas discharged from the reformed gas fired boiler is applied to the heat source for indirect heating of the gasification furnace and the drying drum, so that the entire waste treatment facility can effectively use thermal energy. It was possible to improve.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Embodiment 1>
FIG. 1 is an overall configuration diagram of Embodiment 1 of a waste treatment facility applied to the implementation of a waste treatment method according to the present invention. As shown in FIG. 1, the waste treatment facility 100 has a pretreatment facility 1. The waste pit 2 provided in the pretreatment facility 1 includes, for example, municipal waste, car shredder dust, waste plastics, construction, and the like. Waste materials and other wastes a are input.

  Further, the pretreatment facility 1 is provided with a two-shaft crushing device 3, and the waste a in the garbage pit 2 conveyed by the overhead traveling grab 4 has a predetermined size, for example, a length of one side. Is crushed to a size of about 100 mm or less.

  The waste a crushed to a predetermined size by the crushing device 3 is put into a hopper 6 provided in the kiln-type dryer 5. Waste a in the hopper 6 is supplied to the dryer main body 5 a by the screw feeder 7. And while passing through the inside of the dryer main body 5a, it is indirectly heated to predetermined temperature, for example, 100 degreeC-150 degreeC, normally about 120 degreeC, and is dried.

  At this time, the heating exhaust gas inlet temperature for the dryer is, for example, 400 ° C. to 300 ° C., usually 350 ° C., and the heating exhaust gas outlet temperature for the dryer is, for example, 180 ° C. to 120 ° C., usually 150 ° C. .

  The waste a dried by the dryer 5 is introduced into the kiln type gasification furnace 10. Then, it is indirectly heated to a predetermined temperature, for example, about 300 ° C. to 600 ° C., usually about 450 ° C. in a low oxygen atmosphere state in which air is substantially shut off while passing through the rotary drum 10a of the gasification furnace 10, and heat It is divided into cracked gas b and solid residue c.

  As shown in FIGS. 2 and 3, the gasification furnace 10 includes a first heat transfer tube group 11a including a plurality of heat transfer tubes 11 arranged along the inner wall of the rotary drum 10a, and a radial direction. And a second heat transfer tube group 12a composed of a plurality of heat transfer tubes 12 arranged.

  In this case, the gasification furnace heating exhaust gas inlet temperature is, for example, 600 ° C. to 450 ° C., usually 550 ° C., and the gasification furnace heating exhaust gas outlet temperature is, for example, 350 ° C. to 250 ° C., usually 300 ° C. It is.

  The gasifier 10 includes a cracked gas treatment system C for treating the pyrolysis gas b generated in the gasifier 10, and a residue treatment system D for treating the solid residue c generated in the gasifier 10. Is connected. The gasification furnace 10 includes a pyrolysis residue cooler 13 that cools the residue c to 100 ° C. or less, usually about 80 ° C.

  The cracked gas treatment system C includes a gas reforming furnace 15, a gas cooling boiler 16, a desalting agent supply device (not shown), a dust removing device 17, a reformed gas fired boiler 18, a denitration tower 19, a temperature reducing tower 20, A desulfurization bag filter 21 and a chimney 22 are provided.

The gas reforming furnace 15 introduces an oxidant gas d composed of water vapor and oxygen or air, and the pyrolysis gas b obtained in the gasification furnace 10, and combustible components contained in the pyrolysis gas b. And high temperature (for example, 900 ° C. to 1200 ° C., usually 1100 ° C.), and the higher hydrocarbon (CnHn) in the pyrolysis gas is converted into carbon monoxide (CO). , Converted into a reformed gas e composed of carbon dioxide (CO ₂ ) and hydrogen (H ₂ ) (see [Chemical Formula 1]). At this time, the oxidant gas d is supplied from an external supply source through the oxidant gas supply pipe 23, for example.

  The gas reforming furnace 10 sets the heating temperature of the introduced pyrolysis gas b to a high temperature range of 900 ° C. to 1200 ° C. and sets the passage time of the pyrolysis gas b to 2 to 8 seconds, usually 4 seconds. It is set. By setting the heating temperature and the heating time, the gas heating time can be sufficiently maintained, and the pyrolysis gas b can be completely reformed to carbon monoxide (CO), etc. Harmful dioxins can be completely decomposed and made harmless by high-temperature heating.

  The gas cooling boiler 16 rapidly cools the high-temperature gas reformed in the gas reforming furnace 15, and for example, an air preheater 24 is applied as an indirect cooling device. In the gas cooling boiler 16, the cooling temperature of the introduced gas is set to 200 ° C. to 350 ° C., desirably 280 to 320 ° C., usually 300 ° C., and the gas passage time is set to several seconds to several tens of seconds. is doing. The cooling temperature of the gas cooling boiler 16 is determined in consideration of the heat resistance temperature of the bag filter 28 of the dust removing device 17 described later, the combustion efficiency of the reformed gas fired boiler 18, the optimum reaction temperature of the desalting agent, and the like.

The high temperature (900 ° C. to 1200 ° C., usually 1100 ° C.) reformed gas e introduced into the gas cooling boiler 16 is rapidly cooled (200 ° C. to 350 ° C., desirably 280 to 800 ° C.) by setting the cooling temperature and passage time. 320 ° C., usually 300 ° C.). That is, the reformed gas e generated in the gas reforming furnace 15 is lowered to a predetermined temperature by the gas cooling boiler 16, so that carbon monoxide (CO) is synthesized without synthesizing harmful substances such as DXNs. Carbon dioxide (CO ₂ ) and hydrogen (H ₂ ) can be maintained as they are.

Since the gas cooling boiler 16 can heat the air f by exchanging heat with the high-temperature reformed gas, the heated air is used as anti-white air and surplus air for combustion. Yes. The white air f ₁ is supplied to the chimney 22, and the surplus combustion air f ₂ is supplied to the reformed gas-fired boiler 18. Here, the code | symbol 25 is a blower for air intake.

The desalting agent supply device (not shown) is for supplying a desalting agent connected to the pipe 26 communicating with the outlet of the gas cooling boiler 16 and the inlet of the dust removing device 17 in a T-shape. Sodium bicarbonate (NaHCO ₃ ) g as a desalting agent is supplied through a pipe 27 using a carrier gas. The pipe 26 has a valve 14 on the upstream side of the desalting agent supply pipe 27. The bypass pipe 26a branched from the pipe 26 has a valve 14a.

  There is a calcium-based desalting agent (for example, slaked lime) as a desalting agent used for desalting treatment, but slaked lime is used in large quantities when high removal rate is required because of low reactivity in the high temperature range. There is a need to. In contrast, baking soda, which is a sodium-based desalting agent, is more reactive than calcium-based desalting agents, so the amount used can be reduced. I will use it.

  By the way, in general, as the particle size of the desalting agent is smaller, the specific surface area is increased and the reactivity is improved. However, in the case of baking soda, if the particle size is small, it may agglomerate and solidify, or the adhesiveness may increase and the fluidity may deteriorate. For example, a bridge is formed at the discharge port of the storage tank. The average particle size of the baking soda is preferably 15 to 25 μm. The amount of sodium bicarbonate supplied depends on the concentration of hydrogen chloride gas, but it is preferably about 1 to 2 times the theoretical amount (1-2 in terms of equivalent ratio) required to neutralize the entire amount of hydrogen chloride gas. On the other hand, the flow rate of the carrier gas is preferably about 16 to 20 m / s.

  Further, as a desalting agent, a desalting agent obtained by mixing sodium bicarbonate, hydrophilic wet silica and hydrophobic metal soap powder, for example, sodium bicarbonate powder, hydrophilic wet silica powder, hydrophobic An exhaust gas treating agent containing a metal soap powder, having a wet silica content of 1 to 10 wt%, and a metal soap content of 0.1 to 0.5 wt% is preferably used.

  At this time, as the wet silica, white carbon having an average particle diameter of 10 to 200 μm is preferable. The metal soap is preferably at least one of calcium stearate, magnesium stearate, and zinc stearate. Further, sodium bicarbonate powder, wet silica powder, and metal soap powder are mixed, and then pulverized so as to have an average particle diameter of 5 to 15 μm.

  The dust removing device 17 is a tank-shaped dust removing device main body 17a in which a plurality of bag filters 28 are loaded. In this embodiment, two dust removing devices 17 are provided in parallel and are used alternately. Further, a desalting residue cooler 29 is provided below the dust removing device 17 so that the desalting residue h is cooled to 100 ° C. or less, usually about 80 ° C.

The fine powdered baking soda that has flowed into the dust removing device main body 17a from the desalting agent supply pipe 27 is collected on the filter cloth surface of the bag filter 28, and forms a layer on the filter cloth surface. When the reformed gas e at a high temperature (for example, 300 ° C.) passes through this fine powdered baking soda layer, the hydrogen chloride gas in the reformed gas e reacts to produce sodium chloride (NaCl) ([Chemical Formula 2]). As a result, hydrogen chloride gas is removed from the reformed gas e. The clean and high temperature (for example, 300 ° C.) reformed gas e desalted by the bag filter 28 is supplied to the reformed gas-fired boiler 18 via the pipe 30.

The reformed gas-fired boiler 18 is used for combustion from a dehydrated clean high-temperature (eg, 300 ° C.) reformed gas e and a pipe 33 branched from the pipe 32 connecting the air preheater 24 and the chimney 22. Preheated air (for example, 210 ° C.) f ₂ is supplied and high-temperature combustion (for example, 1000 ° C.) is performed, whereby high-temperature and high-pressure steam i can be obtained. For example, in the case of high-calorie waste, steam at 500 ° C. and 50 ata (4.9 MPa) can be obtained, and even in the case of low-calorie waste, steam at 400 ° C. and 40 ata (3.92 MPa) is obtained. be able to. At that time, the steam j generated when the waste a is dried by the dryer 5 is introduced into the reformed gas fired boiler 18 through the pipe 34, and the odor in the steam j is thermally decomposed. In addition, dioxins regenerated by the gas cooling boiler 16 and the like are also thermally decomposed.

  The high-temperature and high-pressure steam i obtained by the reformed gas-fired boiler 18 is supplied to a steam turbine 36 provided with a generator 35 for power generation. The steam i exiting the steam turbine 36 is condensed by a condenser 37 and returned to the reformed gas-fired boiler 18.

  The reformed gas-fired boiler 18 is adapted to take out heated exhaust gas k for a gasifier at a high temperature (for example, 600 ° C. to 450 ° C., usually 550 ° C.) from the middle thereof. k is supplied to the first and second heat transfer tubes 11 and 12 of the gasification furnace 10 through the pipe 38. The exhaust gas k exiting these heat transfer tubes 11 and 12 is supplied to a heating jacket (not shown) of the dryer 5 through a pipe 39. The exhaust gas k exiting the heating jacket is returned to the pipe 41 connecting the reformed gas-fired boiler 18 and the denitration tower 19 via the pipe 40. Reference numeral 42 denotes a suction blower provided in the exhaust gas return pipe 40.

  The exhaust gas supply pipe 38 and the pipe 39 communicating the gasification furnace 10 and the dryer 5 are communicated with each other by a first bypass pipe 44 having a valve 43. The pipe 39 and the exhaust gas return pipe 40 are connected by a third bypass pipe 48 having a valve 47. The valve 47 of the third bypass pipe 48 is normally closed.

Further, the pipe 41 connecting the reformed gas fired boiler 18 and the denitration tower 19, the NH ₃ gas m through the NH ₃ gas supply pipe 49 is supplied from the NH ₃ gas supply source (not shown), a boiler exhaust gas denitration tower 19 It is designed to decompose NOx inside. The exhaust gas k that has passed through the denitration tower 19 with a built-in bag filter is cooled by waste water n such as factory waste water and domestic waste water that is injected from the nozzle 50 in the temperature reducing tower 20. The exhaust gas k cooled to a predetermined temperature (for example, about 180 ° C.) in the temperature reducing tower 20 is discharged from the chimney 22 through the desulfurization bag filter 21 into the atmosphere. At that time, a desulfurization agent is supplied from a desulfurization agent supply pipe 54 into a pipe 55 connecting the temperature reducing tower 20 and the desulfurization bag filter 21 to neutralize SOx in the exhaust gas. The duct 51 extending from the desulfurization bug filter 21 to the chimney 22 is provided with an incentive blower 52 and a valve 53.

  On the other hand, the residue treatment system D includes a fractionation tower 61, a carbide melting gasification furnace 62, a molten exhaust gas cooling tower 63, a slag water tank 64, an ash cooler 65, and an incentive blower 66.

  The fractionation tower 61 is for separating, crushing, and storing the solid residue c obtained in the gasification furnace 10. The sorter 68 sorts the solid residue c into a metal (not shown), a carbonized organic substance p, and an inorganic component r using a magnetic separator or an aluminum sorter. The carbonized organic substance p and the inorganic component r selected by the sorter 68 are pulverized by a biaxial crusher 69 and stored in a storage tank 70 below the crusher 69.

  The mixture of the carbonized organic substance p and the inorganic component r in the storage tank 70 is supplied to the carbide melting gasification furnace 62. Then, the carbonized component is gasified at a high temperature (for example, 1200 to 1600 ° C., usually 1400 ° C.), and the inorganic component r is melted. The combustible gas s is rapidly cooled in the molten exhaust gas cooling tower 63 (about 1400 ° C. → about 300 ° C.) and then merged with the reformed gas e already described. On the other hand, the inorganic component r melted in the carbide melting gasification furnace 62 flows into the slag water tank 64 as slag t and is recovered.

<Embodiment 2>
The waste treatment facility of FIG. 4 is configured to supply the exhaust gas k of the reformed gas-fired boiler 18 to the gasifier 10 and the dryer 5 in total. In this case, the exhaust gas k after heating the dryer 5 is discharged into the atmosphere from the chimney 22 through the denitration tower 19, the temperature reduction tower 20, and the desulfurization bag filter 21. Since there is no change other than that, the same code | symbol as the apparatus of the waste disposal facility of Embodiment 1 is attached | subjected, and detailed description is abbreviate | omitted.

<Embodiment 3>
The waste treatment facility of FIG. 5 is simplified by omitting the denitration tower 19 and the temperature reduction tower 20 of the second embodiment of the waste treatment facility. The same reference numerals as those of the processing equipment are attached and detailed description is omitted.

<Embodiments 4 and 5>
In addition, you may abbreviate | omit about the dryer 5 and the thermal decomposition residue system D of Embodiment 1-3. When the dryer 5 is omitted, the gasification furnace outlet pipe 39 and the exhaust gas pipe 40 are connected by a bypass pipe 57. On the other hand, when omitting the pyrolysis residue system D, the residue c cooled by the pyrolysis residue cooler 13 is collected and processed in a dedicated pyrolysis residue facility.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole block diagram of 1st Embodiment of the waste disposal equipment applied to implementation of the waste disposal method which concerns on this invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a whole block diagram of 2nd Embodiment of the waste disposal facility applied to implementation of the waste disposal method which concerns on this invention. It is a whole block diagram of 2nd Embodiment of the waste disposal facility applied to implementation of the waste disposal method which concerns on this invention.

Explanation of symbols

a Waste b Pyrolysis gas c Solid residue d Oxidant gas e Reformed gas g Baking soda

Claims (8)

  The pretreatment process that introduces and crushes waste containing organic matter, and the waste that is crushed in the pretreatment process, and indirectly heated in a state where the air is almost shut off, the pyrolysis gas and solid residue A gasification step that decomposes into water, an oxidant gas composed of water vapor and oxygen or air, and a pyrolysis gas obtained in the gasification step, and a combustible component and an oxidant contained in the pyrolysis gas A gas reforming step in which oxygen in the gas is reacted to convert higher hydrocarbons in the pyrolysis gas into a reformed gas composed of carbon monoxide, carbon dioxide, and hydrogen at a high temperature of 900 to 1200 ° C; A gas cooling process for rapidly cooling the reformed gas obtained in the gas purification process to 200 to 350 ° C. and a gas obtained in the gas cooling process are introduced, and the hydrogen chloride gas contained in the gas is removed by a sodium-based desalting agent. Dust removal and hydrogen chloride removal process Waste treatment method characterized in that comprising a dust and reformed gas fired power step clean hot gas obtained in the hydrogen chloride removal step (200 to 350 ° C.) for generating electric power by Thailand reformed gas fired boiler.   The pretreatment process that introduces and crushes waste containing organic matter, and the waste that is crushed in the pretreatment process, and indirectly heated in a state where the air is almost shut off, the pyrolysis gas and solid residue A gasification step that decomposes into water, an oxidant gas composed of water vapor and oxygen or air, and a pyrolysis gas obtained in the gasification step, and a combustible component and an oxidant contained in the pyrolysis gas A gas reforming step in which oxygen in the gas is reacted to convert higher hydrocarbons in the pyrolysis gas into a reformed gas composed of carbon monoxide, carbon dioxide, and hydrogen at a high temperature of 900 to 1200 ° C; A gas cooling process for rapidly cooling the reformed gas obtained in the gas purification process to 200 to 350 ° C. and a gas obtained in the gas cooling process are introduced, and the hydrogen chloride gas contained in the gas is removed by a sodium-based desalting agent. Dust removal and hydrogen chloride removal process A reformed gas fired power generation process in which clean high-temperature gas (200 to 350 ° C.) obtained in the dust removal and hydrogen chloride removal process is fired with a reformed gas fired boiler, and exhaust gas discharged from the reformed gas fired boiler A waste gas treatment method characterized in that it comprises a boiler exhaust gas primary use step applied to indirect heating of the pyrolysis drum in the gasification step.   A pretreatment process that introduces and crushes waste containing organic matter, a drying process that dries the waste crushed in the pretreatment process, and a state where the waste dried in the drying process is introduced and the air is almost cut off. Indirect heating with a gasification step that decomposes into a pyrolysis gas and a solid residue, an oxidant gas composed of water vapor and oxygen or air, and a pyrolysis gas obtained in the gasification step, A flammable component contained in the pyrolysis gas is reacted with oxygen in the oxidant gas, and the high-order hydrocarbons in the pyrolysis gas are converted from carbon monoxide, carbon dioxide, and hydrogen at a high temperature of 900 to 1200 ° C. A gas reforming process for converting to a reformed gas, a gas cooling process for rapidly cooling the reformed gas obtained in the gas reforming process to 200 to 350 ° C., and a gas obtained in the gas cooling process, Hydrogen chloride gas contained in sodium Dedusting and hydrogen chloride removing process to remove with desalting agent, and reformed gas fired to generate electricity by burning clean high temperature gas (200-350 ° C) obtained in dust removing and hydrogen chloride removing process with reforming gas fired boiler A waste treatment method comprising a power generation process and a boiler exhaust gas primary use process in which all or part of exhaust gas discharged from a reformed gas fired boiler is applied for indirect heating of a pyrolysis drum in a gasification process .   A pretreatment process that introduces and crushes waste containing organic matter, a drying process that dries the waste crushed in the pretreatment process, and a state where the waste dried in the drying process is introduced and the air is almost cut off. Indirect heating with a gasification step that decomposes into a pyrolysis gas and a solid residue, an oxidant gas composed of water vapor and oxygen or air, and a pyrolysis gas obtained in the gasification step, A flammable component contained in the pyrolysis gas is reacted with oxygen in the oxidant gas, and the high-order hydrocarbons in the pyrolysis gas are converted from carbon monoxide, carbon dioxide, and hydrogen at a high temperature of 900 to 1200 ° C. A gas reforming process for converting to a reformed gas, a gas cooling process for rapidly cooling the reformed gas obtained in the gas reforming process to 200 to 350 ° C., and a gas obtained in the gas cooling process, Hydrogen chloride gas contained in sodium Dedusting and hydrogen chloride removing process to remove with desalting agent, and reformed gas fired to generate electricity by burning clean high temperature gas (200-350 ° C) obtained in dust removing and hydrogen chloride removing process with reforming gas fired boiler Used in power generation process, boiler exhaust gas primary use process that applies all or part of exhaust gas discharged from reformed gas fired boiler for indirect heating of pyrolysis drum in gasification process, and pyrolysis drum in gasification process A waste gas treatment method characterized by comprising a boiler exhaust gas secondary use step for applying the boiler exhaust gas for indirect heating of a drying drum in a drying step.   The waste treatment method according to claim 1 or 2, wherein a denitration tower, a temperature reduction tower, a desulfurization bag filter, and a chimney are arranged on the downstream side of the reformed gas fired boiler.   The waste treatment method according to claim 3 or 4, wherein a denitration tower, a temperature reduction tower, a desulfurization bag filter, and a chimney are arranged in an exhaust gas pipe that guides the exhaust gas after heating the dryer.   The waste treatment method according to claim 3 or 4, wherein a desulfurization bag filter and a chimney are arranged in an exhaust gas pipe for guiding exhaust gas after heating the dryer.   A residue treatment system for treating a solid residue separated in a gasification furnace includes a separation tower, a carbide melting gasification furnace, a slag water tank, a molten exhaust gas cooling tower, and an ash cooler. In the carbide melting gasification furnace, The refuse treatment method according to any one of claims 1 to 4, wherein the generated combustible gas is rapidly cooled to 200 to 350 ° C in a molten exhaust gas cooling tower and then mixed into the reformed gas. .