CN105441133A - Lurgi crushed coal fixed bed pressurized gasification environment-friendly yield-increasing system and process - Google Patents
Lurgi crushed coal fixed bed pressurized gasification environment-friendly yield-increasing system and process Download PDFInfo
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- CN105441133A CN105441133A CN201510773771.9A CN201510773771A CN105441133A CN 105441133 A CN105441133 A CN 105441133A CN 201510773771 A CN201510773771 A CN 201510773771A CN 105441133 A CN105441133 A CN 105441133A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/20—Apparatus; Plants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/20—Apparatus; Plants
- C10J3/34—Grates; Mechanical ash-removing devices
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1603—Integration of gasification processes with another plant or parts within the plant with gas treatment
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1603—Integration of gasification processes with another plant or parts within the plant with gas treatment
- C10J2300/1606—Combustion processes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1603—Integration of gasification processes with another plant or parts within the plant with gas treatment
- C10J2300/1615—Stripping
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
- C10J2300/1807—Recycle loops, e.g. gas, solids, heating medium, water
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
- C10J2300/1807—Recycle loops, e.g. gas, solids, heating medium, water
- C10J2300/1815—Recycle loops, e.g. gas, solids, heating medium, water for carbon dioxide
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
- C10J2300/1861—Heat exchange between at least two process streams
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- 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
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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- Industrial Gases (AREA)
Abstract
The invention discloses a lurgi crushed coal fixed bed pressurized gasification environment-friendly yield-increasing system and process. The system comprises a gasification furnace, a heat exchanger, a cooling scrubber, a waste heat boiler, a CO transformation cooling system, a CO2 absorption tower and a flash tank, which are connected in sequence, wherein the lower part of the side wall of the gasification furnace is provided with a gasifying agent spray inlet; the flash tank is connected with the heat exchanger; and the heat exchanger is connected with the gasifying agent spray inlet. Feed coals are gasified in the gasification furnace to produce a crude gas; the crude gas is cooled through the cooling scrubber and the waste heat boiler and then enters the CO transformation cooling system to obtain a synthesis gas; the synthesis gas is introduced into the CO2 absorption tower, and CO2 is absorbed by using a low-temperature methanol barren solution; an absorbent is regenerated in the flash tank; and the separated CO2 is introduced into the heat exchanger to exchange heat with the crude gas and then is introduced into the gasification furnace for secondary reaction. The environment-friendly yield-increasing system hardly discharges CO2 and is beneficial for productivity promotion, energy conservation and emission reduction; and CO2 in the crude gas is recycled for reaction, so that the yield of CO is obviously increased and the whole yield is improved.
Description
Technical field
The invention belongs to coal processing technology field, relate to a kind of Shandong strange broken coal fixed bed pressured gasification environmentally friendly yield-increasing system; The invention still further relates to the technique that this system a kind of produces decontaminating syngas.
Background technology
During the early stage fast development of Chemical Industry, the strange broken coal gasification technology in Shandong, with advantages such as its technology maturation, gasification condition gentlenesses, obtains huge market accreditation, has larger share of market in gasification field.Along with the raising of various countries' environmental protection standard, and air flow bed etc. is first vaporized progressively ripe and apply, Shandong strange broken coal gasification technology is due to lower the brought available gas purity of gasification temperature low (effective synthetic gas accounts for about 65% of raw gas, and the effective synthetic gas of advanced entrained flow bed gasification technology accounts for raw gas generally more than 90%), CO
2content high (accounting for more than 30% of rough coal tolerance), the shortcomings such as sewage load is large highlight day by day, in market competition, be in weak tendency.The strange crushed coal pressure gasifying system in Shandong run at present, isolated CO in raw gas
2directly emptying (this can cause the deterioration of Greenhouse effect) mostly; Or be used as after a series of purifying treatment he (cost is higher).Application for a patent for invention " coal gas fine coal energy-conserving and environment-protective second gasification technique " (application number 201210122359.7, publication No. CN102660328A, date of publication 2012.09.12) disclose the technique that a kind of coal gas produced low temperature coal gas carries out second gasification, after vapourizing furnace, turn increase a gasification system to process fine coal, tar and CO
2deng, but these improvement costs are higher, and can have a certain impact to subsequent disposal operation.
Summary of the invention
An object of the present invention is to provide a kind of Shandong strange broken coal fixed bed pressured gasification environmentally friendly yield-increasing system, under the prerequisite of production increasing environment-friendly, reduces improvement cost.
Another object of the present invention is to provide the technique that a kind of said system produces decontaminating syngas.
The technical solution adopted in the present invention is: a kind of Shandong strange broken coal fixed bed pressured gasification environmentally friendly yield-increasing system, comprises the vapourizing furnace, interchanger, cooling scrubber, waste heat boiler, the CO that are connected successively and converts cooling system, CO
2adsorption tower and flash tank, vapourizing furnace lower sidewall is provided with vaporized chemical entrance, and flash tank is connected with interchanger, and interchanger is also connected with vaporized chemical entrance.
Another technical scheme of the present invention is: a kind of technique utilizing above-mentioned Shandong strange broken coal fixed bed pressured gasification environmentally friendly yield-increasing system to produce decontaminating syngas, specifically carries out according to the following steps:
Step 1: feed coal is added vapourizing furnace, sends into vapourizing furnace by steam and oxygen by vaporized chemical entrance simultaneously, gasifies by the strange crushed coal pressure gasifying technique in existing Shandong to the feed coal in vapourizing furnace, generate raw gas and lime-ash;
Step 2: raw gas is discharged from vapourizing furnace, enters cooling washing tower through interchanger, carries out cooling washing, obtains middle temperature rough gas;
Step 3: middle temperature rough gas is discharged from cooling washing tower, enters waste heat boiler, the waste heat in recovery in temperature rough gas, obtains low temperature rough gas;
Step 4: low temperature rough gas is sent into CO and converted cooling system, regulates the ratio of carbon-hydrogen in low temperature rough gas, obtains synthetic gas; This synthetic gas sends into CO
2adsorption tower, enters CO
2the synthetic gas of adsorption tower moves from the bottom up, and low-temp methanol lean solution is by CO
2adsorption tower top sprays downwards, absorbs the CO in synthetic gas
2, generate by CO
2satisfied methyl alcohol rich solution, the synthetic gas after purification is discharged by top, absorption tower;
Step 5: methyl alcohol rich solution is from CO
2after discharging bottom adsorption tower, send into flash tank and carry out flash distillation, obtain methyl alcohol lean solution and CO
2gas;
Step 6:CO
2gas is discharged from flash tank, sends into interchanger, enters the CO of interchanger
2the raw gas that gas and vapourizing furnace send into interchanger carries out heat exchange, after this, from vapourizing furnace raw gas out all with the CO entering interchanger
2gas just enters cooling washing tower after carrying out heat exchange; CO after heat exchange
2gas enters vapourizing furnace by vaporized chemical entrance and participates in gasification reaction together with vaporized chemical.
Environmentally friendly yield-increasing system of the present invention has the following advantages:
1) broken coal, moulded coal or semicoke are converted into the synthetic gas of purification, hardly, arrange CO
2, be conducive to lifting and the energy-saving and emission-reduction of system production capacity.
2) due to CO
2return stove recycling, make CO in raw gas
2content be minimized, thus ensure that the accounting of synthetic gas effective constituent is improved, becoming more convenient by making the subsequent disposal of raw gas.
3) under same reaction conditions due to the CO in raw gas
2carry out reclaiming reacting, by making the output of CO obviously increase with the reduction reaction of carbon, namely the output of synthetic gas is promoted, thus improves the output of whole system again.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of environmentally friendly yield-increasing system of the present invention.
In figure: 1. vapourizing furnace, 2. cooling scrubber, 3. waste heat boiler, 4.CO converts cooling system, 5.CO
2adsorption tower, 6. flash tank, 7. compressor, 8. interchanger, 9. vaporized chemical entrance, 10. coal adding system, 11. dust removing systems.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, environmentally friendly yield-increasing system of the present invention, comprises vapourizing furnace 1, is provided with dust removing system 11 bottom vapourizing furnace 1, and the gas exit on vapourizing furnace 1 top is connected with the raw gas import on interchanger 8, and vapourizing furnace 1 lower sidewall is provided with vaporized chemical entrance 9; Vaporized chemical entrance 9 returns stove CO with interchanger 8
2outlet is connected, the raw gas outlet of interchanger 8 is connected with the raw gas entrance of cooling scrubber 2, the cooling gas exit of cooling scrubber 2 is communicated with the middle temperature gas entry of waste heat boiler 3 bottom, the low temperature rough gas entrance that gas exit and the CO at waste heat boiler 3 top convert cooling system 4 bottom is communicated with, and CO converts conversion gas exit and the CO of cooling system 4
2the conversion gas entrance of adsorption tower 5 lower end is connected, CO
2the decontaminating syngas outlet at adsorption tower 5 top is connected with downstream units, CO
2the methyl alcohol rich solution outlet of adsorption tower 5 lower end is connected with the methyl alcohol rich solution entrance of flash tank 6, the CO at flash tank 6 top
2liberation port is connected with the inlet mouth of compressor 7, the air outlet of compressor 7 and the cold CO of interchanger 8
2import is connected.
For Shandong strange crushed coal pressure gasifying technology due to lower the brought CO of gasification temperature
2the problem that content is high, the invention provides a kind of CO
2return stove recycling technique, reduce CO in synthetic gas
2content, specifically carries out according to the following steps:
Step 1: by coal adding system 10 be the broken coal of 6 ~ 50mm by granularity, the feed coal such as moulded coal or semicoke adds vapourizing furnace 1, steam and oxygen are sent into vapourizing furnace 1 by vaporized chemical entrance 9 simultaneously, by the strange crushed coal pressure gasifying technique in existing Shandong, the feed coal in vapourizing furnace 1 is gasified, generate raw gas and lime-ash, lime-ash is discharged outside vapourizing furnace 1 by dust removing system 11;
Step 2: raw gas discharges vapourizing furnace 1 from the gas exit on vapourizing furnace 1 top, interchanger 8 is entered by raw gas import, then discharge from the raw gas outlet of interchanger 8, and enter cooling washing tower 2 by raw gas entrance, cooling washing is carried out in cooling washing tower 2, wash away a large amount of coal dust contained in raw gas and tar ingredients, obtain the middle temperature rough gas that temperature is about 200 DEG C;
Step 3: middle temperature rough gas is discharged from cooling washing tower 2, waste heat boiler 3 is entered by warm gas entry in waste heat boiler 3 bottom, waste heat in reclaiming in waste heat boiler 3 in temperature rough gas, must low temperature rough gas, in recovery waste heat process, in waste heat boiler 3, produce the low-pressure steam of pressure 0.5 ~ 0.6MPa, this low-pressure steam can be used as the thermal source of flash tank 6 bottom reboiler;
Step 4: the low temperature rough gas entrance that low temperature rough gas converts cooling system 4 bottom by CO enters CO conversion cooling system 4, regulates the hydrogen-carbon ratio in low temperature rough gas, obtain synthetic gas according to different purposes; This synthetic gas is from CO
2cO is sent in adsorption tower 5 lower end
2adsorption tower 5, enters CO
2the synthetic gas of adsorption tower 5 moves from the bottom up, and low-temp methanol lean solution is by CO
2adsorption tower 5 top sprays downwards, and with the CO in synthetic gas
2at CO
2the packing layer surface of adsorption tower 5 reacts, and absorbs the CO in synthetic gas
2, generate by CO
2satisfied methyl alcohol rich solution, the synthetic gas after purification is discharged by top, absorption tower 5, removes lower procedure;
Step 5: methyl alcohol rich solution is from CO
2after discharging bottom adsorption tower 5, send into flash tank 6 and carry out flash distillation, obtain methyl alcohol lean solution and CO
2gas, CO
2gas is enriched in flash tank 6 top;
Step 6: the CO of enrichment
2gas is from the CO at flash tank 6 top
2liberation port is discharged, and enters the inlet mouth of compressor 7, the CO that compressor 7 will enter
2after the pressure of gas increases to 3.0 ~ 4.0MPa, by the cold CO of interchanger 8
2import is sent in interchanger 8, enters the cold CO of interchanger 8
2gas and vapourizing furnace 1 raw gas entering interchanger 8 by raw gas import out carries out heat exchange, after this, from vapourizing furnace 1 raw gas entering interchanger 8 by raw gas import out all with the cold CO entering interchanger 8
2gas just enters cooling washing tower 2 after carrying out heat exchange; Temperature after vaporized chemical and heat exchange is the CO of 400 ~ 600 DEG C
2gas enters vapourizing furnace 1 by vaporized chemical entrance 9 together, gasifies to the feed coal in vapourizing furnace 1 by the strange crushed coal pressure gasifying technique in existing Shandong; Enter in vapourizing furnace 1 by CO
2in the mixed gas of gas and vaporized chemical composition, CO
2the volume of gas is 20% ~ 40% of this mixed gas volume.
Environmentally friendly yield-increasing system of the present invention is by CO
2the systemic CO of adsorption tower 5
2carry out returning stove recycling, made CO in purification coal gas
2content is reduced to below 20ppm.And the CO of low-temp methanol absorption
2be released again in follow-up Mathanol regenerating process, and by CO
2the CO that flashing tower discharges
2collect, the CO will collected afterwards
2by compressor boost by CO
2pressure be increased to 3.0 ~ 4.0MPa.CO after supercharging
2the coal gas of high temperature removing interchanger and just gone out vapourizing furnace 1 carries out heat exchange, and wherein high-temperature coal makes tube side leave with rage, low temperature CO
2walk shell side.The CO returning stove is made by heat exchange
2temperature reaches 400 ~ 600 DEG C, enters vapourizing furnace carry out gasification reaction after intensification with vaporized chemical.Due to CO
2thermo-negative reaction is belonged to, at CO with the reduction reaction of carbon
2return furnace volume large when vapourizing furnace 1 interior reaction temperature can be caused to reduce, for this reason should according to CO
2amount regulate the accounting of oxygen in furnace gas agent, ensure intensity of combustion suitable in vapourizing furnace 1, the temperature in vapourizing furnace 1 controlled at about 1000 DEG C.
Environmentally friendly yield-increasing system of the present invention is lower mainly for efficient synthesis of Gas content, and CO
2the technological transformation of the low temperature gasification system that content is relatively high, only need increase a set of CO on the basis of former gasification system
2collect buffering system and (comprise CO
2adsorption tower 5 and flash tank 6) and supporting CO
2compressor and some, interchanger (cover), just can realize the environmentally friendly yield-increasing technological transformation of former gasification system.
Claims (8)
1. the strange broken coal fixed bed pressured gasification in a Shandong environmentally friendly yield-increasing system, is characterized in that, comprise be connected successively vapourizing furnace (1), interchanger (8), cooling scrubber (2), waste heat boiler (3), CO convert cooling system (4), CO
2adsorption tower (5) and flash tank (6), vapourizing furnace (1) lower sidewall is provided with vaporized chemical entrance (9), and flash tank (6) is connected with interchanger (8), and interchanger (8) is also connected with vaporized chemical entrance (9).
2. the strange broken coal fixed bed pressured gasification in Shandong according to claim 1 environmentally friendly yield-increasing system, it is characterized in that, compressor (7) is provided with between described flash tank (6) and interchanger (8), the inlet mouth of compressor (7) is connected with flash tank (6), and the air outlet of compressor (7) is connected with interchanger (8).
3. utilize the strange broken coal fixed bed pressured gasification environmentally friendly yield-increasing system of Shandong described in claim 1 to produce a technique for decontaminating syngas, it is characterized in that, this technique is specifically carried out according to the following steps:
Step 1: feed coal is added vapourizing furnace (1), steam and oxygen are sent into vapourizing furnace (1) by vaporized chemical entrance (9) simultaneously, by the strange crushed coal pressure gasifying technique in existing Shandong, the feed coal in vapourizing furnace (1) is gasified, generate raw gas and lime-ash;
Step 2: raw gas is discharged from vapourizing furnace (1), enters cooling washing tower (2) through interchanger (8), carries out cooling washing, obtains middle temperature rough gas;
Step 3: middle temperature rough gas is discharged from cooling washing tower (2), enters waste heat boiler (3), the waste heat in recovery in temperature rough gas, obtains low temperature rough gas;
Step 4: low temperature rough gas is sent into CO and converted cooling system (4), regulates the ratio of carbon-hydrogen in low temperature rough gas, obtains synthetic gas; This synthetic gas sends into CO
2adsorption tower (5), enters CO
2the synthetic gas of adsorption tower (5) moves from the bottom up, and low-temp methanol lean solution is by CO
2adsorption tower (5) top sprays downwards, absorbs the CO in synthetic gas
2, generate by CO
2satisfied methyl alcohol rich solution, the synthetic gas after purification is discharged by absorption tower (5) top;
Step 5: methyl alcohol rich solution is from CO
2after adsorption tower (5) bottom is discharged, send into flash tank (6) and carry out flash distillation, obtain methyl alcohol lean solution and CO
2gas;
Step 6:CO
2gas is discharged from flash tank (6), sends into interchanger (8), enters the CO of interchanger (8)
2the raw gas that gas and vapourizing furnace (1) send into interchanger (8) carries out heat exchange, after this, from vapourizing furnace (1) raw gas out all with the CO entering interchanger (8)
2gas just enters cooling washing tower (2) after carrying out heat exchange; CO after heat exchange
2gas enters vapourizing furnace (1) by vaporized chemical entrance (9) and participates in gasification reaction together with vaporized chemical.
4. the technique of production decontaminating syngas according to claim 3, is characterized in that, feed coal in described step 1 adopts granularity to be the broken coal of 6 ~ 50mm, moulded coal or semicoke.
5. the technique of production decontaminating syngas according to claim 3, is characterized in that, in described step 3 recovery waste heat process, produces the low-pressure steam of pressure 0.5 ~ 0.6MPa in waste heat boiler (3).
6. the technique of production decontaminating syngas according to claim 3, is characterized in that, in described step 6, discharges CO from flash tank (6)
2gas enters compressor (7), by compressor (7) by this CO
2gas sends into interchanger (8).
7. the technique of production decontaminating syngas according to claim 6, is characterized in that, the CO that compressor (7) will enter
2after the pressure of gas increases to 3.0 ~ 4.0MPa, send into interchanger (8).
8. the technique of production decontaminating syngas according to claim 3, is characterized in that, in described step 6, and CO after heat exchange in interchanger (8)
2the temperature of gas is 400 ~ 600 DEG C.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108456554A (en) * | 2017-02-22 | 2018-08-28 | 清华大学山西清洁能源研究院 | Short route entrained flow gasification technique and short route gas-flow bed gasifying apparatus |
| CN109233911A (en) * | 2018-11-20 | 2019-01-18 | 宁夏神耀科技有限责任公司 | A kind of coal gas of high temperature Exposure degree technique and device |
| CN113912008A (en) * | 2021-11-17 | 2022-01-11 | 山东津挚环保科技有限公司 | Pressure swing adsorption hydrogen production method for coke oven gas |
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| CN201614361U (en) * | 2009-12-03 | 2010-10-27 | 河南省煤气(集团)有限责任公司义马气化厂 | CO2 return furnace gasification device for concentration and extraction |
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| CN113912008B (en) * | 2021-11-17 | 2023-12-22 | 山东津挚环保科技有限公司 | Pressure swing adsorption hydrogen production method for coke oven gas |
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