CN108641756B - Combined biomass gasification gas purification system - Google Patents

Combined biomass gasification gas purification system Download PDF

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Publication number
CN108641756B
CN108641756B CN201810497606.9A CN201810497606A CN108641756B CN 108641756 B CN108641756 B CN 108641756B CN 201810497606 A CN201810497606 A CN 201810497606A CN 108641756 B CN108641756 B CN 108641756B
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China
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water
purification
gas
seal
water tank
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CN201810497606.9A
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CN108641756A (en
Inventor
陈文威
吴创之
袁洪友
潘贤齐
陈坚
周意
阴秀丽
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Guangzhou Institute of Energy Conversion of CAS
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Guangzhou Institute of Energy Conversion of CAS
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Classifications

    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10KPURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00Purifying combustible gases containing carbon monoxide
    • C10K1/02Dust removal
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of devices for separating particles from gases or vapours
    • B01D50/004Combinations of devices relating to groups B01D45/00 and B01D47/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/14Separation 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 by absorption
    • B01D53/1425Regeneration of liquid absorbents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/14Separation 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 by absorption
    • B01D53/1487Removing organic compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/14Separation 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 by absorption
    • B01D53/18Absorbing units; Liquid distributors therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/14Separation 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 by absorption
    • B01D53/18Absorbing units; Liquid distributors therefor
    • B01D53/185Liquid distributors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/26Drying gases or vapours
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10KPURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00Purifying combustible gases containing carbon monoxide
    • C10K1/02Dust removal
    • C10K1/022Dust removal by baffle plates
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10KPURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K1/00Purifying combustible gases containing carbon monoxide
    • C10K1/08Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
    • C10K1/10Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
    • C10K1/101Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids with water only

Abstract

The invention discloses a combined biomass gasification gas purification system.A water bath dust remover and a spray tower are communicated into an integral structure through a closed purification water tank, the purification water tank is provided with a high-level water tank, a water seal and an air space, the water seal is provided with a water feeding pipeline with a water level regulating pump, the water feeding pipeline is connected with the high-level water tank, the water seal is also provided with a circulating water pipeline with a circulating pump, the circulating water pipeline is communicated with a spray device in the spray tower, and the air space is provided with an inertia separator water baffle and is communicated with an inlet of the spray tower; the height of the water seal is adjusted by the high-level water tank and the water level adjusting pump, so that the depth of the spray head of the impact type water bath dust collector inserted into water is adjusted, and the bottom of the purification water tank is provided with a scraper. The invention has the beneficial effects that: the purification system has the advantages of compact structure, small system resistance, large gas load regulation ratio, good purification effect, stable system operation and the like.

Description

Combined biomass gasification gas purification system
Technical Field
The invention relates to the technical field of biomass, in particular to a wet purification technology for biomass fuel gas.
Background
Biomass gasification is a main conversion technology for high-grade utilization of biomass energy, and is an energy conversion process for burning and reducing biomass raw materials in an anoxic state, the biomass gasification can convert solid biomass raw materials into high-grade combustible gas, but at present, by-products such as dust, tar and the like inevitably exist in the combustible gas generated by biomass gasification, the tar is condensed into liquid at a low temperature, impurities such as mixed ash and the like form black sticky substances to block gas transmission pipelines and gas utilization equipment, and further, the purification treatment of the biomass crude gas is an essential link in the use process of the biomass gas.
At present, the purification technology for biomass gas at home and abroad mainly comprises three modes of wet purification, dry purification and cracking purification.
The dry purification mode is to achieve the purpose of purifying the crude fuel gas containing tar and ash through the process flows of dust removal, indirect cooling and multi-stage filtration. Because tar and ash are deposited and adhered to the filter material, the filter material needs to be frequently replaced, the labor intensity of maintenance and cleaning of operators is increased, and the purification mode has the advantages of low purification efficiency, long process flow, high operation cost and incapability of being applied to industrial production.
The cracking and purifying mode is to crack the tar generated in the gasification process into small molecule combustible gas by chemical reaction, and although the purifying technology can better recycle the energy contained in the tar, the technical process and the control system of the system are complex, the operation cost is high, and the applicability is limited.
The wet purification mode is the most common method for purifying the biomass fuel gas at present, and has low system cost and simple operation.
Patent document No. CN203678213U discloses a "biomass gas dust-removing purifier", which comprises a body, wherein a partition plate is arranged in the middle of the body, the body is divided into a settling chamber and a flushing chamber, the lower part of the body extends into a water seal, the upper part of the settling chamber is provided with an air inlet pipe orifice, and the upper part of the flushing chamber is provided with an air outlet. The gas containing dust enters the settling chamber and impacts the water surface downwards, part of larger dust falls into the water, when the gas passes through the channel of the isolation plate, a large amount of water splash is stirred, the dust is fully contacted with the water, most of particulate dust settles in the water, the gas is purified, and the purified gas enters the impact chamber, is removed of water drops by the water baffle and then flows out of the top gas outlet. The dust settles in the water-sealed ash hopper chamber to form mortar, and the mortar is discharged by manpower or machinery.
This kind of impact water bath dust removal purification technology operation gas passes through the passageway requirement of division board and keeps higher velocity of flow, especially just can obtain better purifying effect under the design velocity of flow, if operation in-process gas load descends and leads to the gas velocity of flow to descend when the deposit room is more, then the purifying effect of gas can obviously worsen, can't satisfy the operation requirement.
The purification process is in need of further improvement and development.
SUMMARY OF THE PATENT FOR INVENTION
The invention aims to provide a high-efficiency combined wet purification system for biomass gasification gas, which has the advantages of compact structure, large gas load regulation ratio, good purification effect and stable system operation.
In order to achieve the above purpose, the invention provides the following technical scheme:
a combined biomass gasification gas purification system comprises an impact type water bath dust remover and a spray tower, wherein the impact type water bath dust remover and the spray tower are of an integral structure through a closed purification water tank, the purification water tank is provided with a high-level water tank, a water seal and a gas space, the water seal is provided with a water feeding pipeline with a water level regulating pump, the water feeding pipeline is connected with the high-level water tank, the high-level water tank is provided with a drain pipe with a valve, the drain pipe is inserted into the water seal to form a closed water loop for regulating the height of the water seal, so that the depth of a spray head of the impact type water bath dust remover inserted into water is regulated, the water seal is also provided with a circulating water pipeline with a circulating pump, the circulating water pipeline is communicated with a spray device in the spray tower, and a gas-water separation device is also arranged above the spray device to remove moisture in gas, the gas space is provided with an inertia separator water baffle, the inertia separator water baffle is positioned between the impact type water bath dust collector and the spray tower and communicated with the inlet of the spray tower, and the bottom of the purification water tank is provided with a scraper.
Compared with the prior art, the invention has the following beneficial effects:
the combined biomass gasification gas purification system is a high-efficiency combined biomass gasification gas wet purification system, and adopts an integral combined design that an impact type water bath dust remover and a spray tower are communicated through a closed purification water tank, so that the purification system has a compact structure, no connecting pipeline is arranged between gas purification devices, and the resistance of the purification system is reduced.
When the gas load changes greatly in the operation process of the purification system, the water seal height of the purification water tank is adjusted through the high-level water tank and the water level adjusting pump, so that the depth of the spray head of the impact type water bath dust collector inserted into water is adjusted, the impact type water bath dust collector is kept in a high-efficiency and stable operation state, and the purification system has the characteristics of high purification efficiency and large gas load regulation ratio.
The combined design of the impact type water bath dust remover and the spray tower further improves the quality of the purified fuel gas and can completely meet the use requirements of gas-using equipment.
Drawings
FIG. 1 is a schematic structural diagram of a combined biomass gasification gas purification system of the invention.
Reference numerals:
1-impact type water bath dust remover; 2-inlet of the impact type water bath dust collector; 3-impact type water bath dust collector nozzle; 4-a spray tower; 5-inlet of spray tower; 6-outlet of spray tower; 7-a spraying device; 8-gas-water separation device; 9-purifying the water tank; 10-gas space; 11-water sealing; 12-high level water tank; 13-a drain pipe; 14-a drain valve; 15-a water level regulating pump; 16-a circulation pump; 17-water supply pipeline; 18-a circulating water line; 19-inertial separator breakwater; 20-a scraper machine; 21-discharge port.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Referring to the attached figure 1, a combined biomass gasification gas purification system comprises an impact type water bath dust remover 1 and a spray tower 4, wherein the impact type water bath dust remover 1 and the spray tower 4 are communicated into an integral structure through a closed purification water tank 9, the purification water tank 9 is provided with a high-level water tank 12, a water seal 11 and a gas space 10, the water seal 11 is provided with a water feeding pipeline 17 with a water level adjusting pump 15, the water feeding pipeline 17 is connected with the high-level water tank 12, the high-level water tank 12 is provided with a water discharging pipe 13 with a water discharging valve 14, the water discharging pipe 13 is inserted into the water seal 11, the water seal 11 is also provided with a circulating water pipeline 18 with a circulating pump 16, the circulating water pipeline 18 is communicated with a spray device 7 in the spray tower 4, the gas space 10 is provided with an inertia separator water baffle plate 19 communicated with an inlet 5 of the spray tower, the bottom of the purification water tank 9 is provided with a scraper machine 20, the, the scraper 20 discharges tar and ash settled in the clean water tank 9 through a discharge port 21.
The specific working process of the invention is as follows: the biomass crude gas enters the impact type water bath dust remover 1 from an inlet 2 of the impact type water bath dust remover, is sprayed out at a high speed at a nozzle 3 of the impact type water bath dust remover to generate strong airflow impact on a water seal 11, wherein most of ash and tar are adhered to water and then remain in the water, and a part of the ash and tar are still mixed with a large amount of impact water drops and foam along with the movement of the gas, the ash and tar in the gas are separated and removed again through an inertial separator water baffle plate 19 arranged in a gas space 10, if the gas load changes greatly in the operation process, the height of the water seal 11 of a purification water tank 9 is adjusted through a high-level water tank 12 and a water level adjusting pump 15, so that the depth of the nozzle 3 of the impact type water bath dust remover inserted into the water seal 11 is adjusted, the impact type water bath dust remover is kept in a high-efficiency and stable purification state, the purified gas enters a spray tower 4 through an inlet 5 of the spray tower and is fully mixed and, further get rid of the moisture in the gas through gas-water separation device 8 behind ash content, the tar, the gas of repurifying passes through spray column export 6 and gets into gas appliances, and this clean system compact structure, system resistance are little, purifying effect is good, the gas after the purification can satisfy the operation requirement of gas appliances completely. The tar and ash settled in the cleaning water tank 9 are discharged out of the tank through the discharge port 21 by the scraper 20, so that the cleaning system can continuously and stably operate, and the settled circulating water is re-fed into the circulating water pipeline 18 by the circulating pump 16, thereby reducing the consumption of water for the cleaning system.
The above detailed description is specific to possible embodiments of the present invention, and the embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.

Claims (3)

1. The utility model provides a modular biomass gasification gas clean system which characterized in that: the device comprises an impact type water bath dust remover and a spray tower, wherein the impact type water bath dust remover and the spray tower are communicated into an integral structure through a closed purification water tank, crude fuel gas is purified by the impact type water bath dust remover, the purification water tank and the spray tower and then discharged from an outlet of the spray tower, a water seal is arranged in the purification water tank, a space above the water seal forms an air space, a spray head of the impact type water bath dust remover is arranged below the water surface of the water seal, the water seal is connected with a high-level water tank through a water feeding pipeline with a water level adjusting pump, the high-level water tank is connected with the water seal through a water discharging pipe with a valve, and the water discharging pipe is inserted into the water seal to form a closed water loop; when the gas load changes greatly in the operation process of the purification system, the height of a water seal is adjusted through the high-level water tank and the water level adjusting pump, so that the depth of a spray head of the impact type water bath dust collector inserted into water is adjusted, the water seal is also provided with a circulating water pipeline with a circulating pump, the circulating water pipeline is communicated with a spray device in the spray tower, and the bottom of the purification tank is provided with a scraper machine; and a gas-water separation device is also arranged above the spraying device.
2. The combined biomass gasification gas purification system according to claim 1, wherein: and an inertia separator water baffle is arranged between the impact type water bath dust collector and the spray tower in the gas space.
3. The combined biomass gasification gas purification system according to claim 1, wherein: and the inclined side wall of the purification water tank is provided with a discharge port, the height of the discharge port is higher than that of the water seal, and sediment is discharged from the discharge port through the scraper conveyor.
CN201810497606.9A 2018-05-22 2018-05-22 Combined biomass gasification gas purification system Active CN108641756B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810497606.9A CN108641756B (en) 2018-05-22 2018-05-22 Combined biomass gasification gas purification system

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Application Number Priority Date Filing Date Title
CN201810497606.9A CN108641756B (en) 2018-05-22 2018-05-22 Combined biomass gasification gas purification system

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CN108641756B true CN108641756B (en) 2021-02-23

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102276114A (en) * 2011-07-08 2011-12-14 中国水利水电科学研究院 Water treatment equipment
CN203155017U (en) * 2012-10-31 2013-08-28 周鼎力 A gas purification device
CN105238451A (en) * 2015-11-12 2016-01-13 中国科学院广州能源研究所 Efficient combined-type cooling and purifying system for biomass gasification gas

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5030407B2 (en) * 2005-09-01 2012-09-19 大阪瓦斯株式会社 Fuel gas purification system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102276114A (en) * 2011-07-08 2011-12-14 中国水利水电科学研究院 Water treatment equipment
CN203155017U (en) * 2012-10-31 2013-08-28 周鼎力 A gas purification device
CN105238451A (en) * 2015-11-12 2016-01-13 中国科学院广州能源研究所 Efficient combined-type cooling and purifying system for biomass gasification gas

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