CN114877362A - Organic hazardous waste pyrolysis non-condensing incineration flue gas purification system and purification method - Google Patents

Organic hazardous waste pyrolysis non-condensing incineration flue gas purification system and purification method Download PDF

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Publication number
CN114877362A
CN114877362A CN202210536453.0A CN202210536453A CN114877362A CN 114877362 A CN114877362 A CN 114877362A CN 202210536453 A CN202210536453 A CN 202210536453A CN 114877362 A CN114877362 A CN 114877362A
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flue gas
flue
deacidification
cooling
treated
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CN202210536453.0A
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Chinese (zh)
Inventor
王元元
王登生
赵磊
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Wuxi Xuelang Environmental Technology Co Ltd
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Wuxi Xuelang Environmental Technology Co Ltd
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Priority to CN202210536453.0A priority Critical patent/CN114877362A/en
Publication of CN114877362A publication Critical patent/CN114877362A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
    • 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
    • B01D53/02—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 by adsorption, e.g. preparative gas chromatography
    • B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • 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
    • B01D53/02—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 by adsorption, e.g. preparative gas chromatography
    • B01D53/06—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 by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/60—Heavy metals or heavy metal compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/704—Solvents not covered by groups B01D2257/702 - B01D2257/7027
    • 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
    • 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
    • Y02E20/30—Technologies for a more efficient combustion or heat usage

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention provides an organic hazardous waste pyrolysis non-condensed steam incineration flue gas purification system which can complete a purification process with lower system operation cost on the basis of ensuring that flue gas reaches the emission standard. It includes: the cooling device, the dust removal device and the deacidification device are sequentially connected and communicated with each other; an adsorption device is arranged on the flue between the cooling device and the dust removal device; the cooling device is realized based on a waste heat boiler, and a hot gas inlet of the waste heat boiler is communicated with a smoke outlet of the non-condensable gas burning device; dust collector realizes based on the sack cleaner, deacidification device includes: the demister is arranged at the top of the wet deacidification tower; the adsorption device includes: active carbon storage storehouse and injection apparatus, injection apparatus set up in the heat sink with on the flue between the dust collector. Meanwhile, the invention also discloses a method for purifying the incineration flue gas without condensing steam by pyrolyzing the organic hazardous waste.

Description

Organic hazardous waste pyrolysis non-condensing incineration flue gas purification system and purification method
Technical Field
The invention relates to the technical field of industrial flue gas treatment equipment, in particular to a system and a method for purifying incineration flue gas generated by pyrolysis of organic hazardous waste without condensing steam.
Background
The organic hazardous waste is heated and decomposed into solid matters and gaseous matters through the pyrolysis furnace, wherein the solid matters are the regenerated carbon, and the gaseous matters are the pyrolysis gas. The pyrolysis gas is cooled and then divided into a gas phase and a liquid phase, wherein the liquid phase is pyrolysis liquid, and the gas phase is non-condensable gas. The non-condensable gas is subjected to coarse purification and then enters a combustion chamber for combustion to generate hot air for supplying heat to the pyrolysis furnace. High-temperature flue gas (about 500 ℃) generated by burning non-condensed steam contains acid gas (mainly HCL, HF and SO 2), particulate matters, dioxin and the like, and in order to meet the requirement of GB18484-2020 standard, the flue gas pollutants need to be purified.
In the prior art, the flue gas purification process aiming at non-condensable gas comprises the following steps: quenching and cooling, deacidifying by a wet method, adsorbing by an activated carbon bed, introducing a fan and a chimney. However, the rapid cooling not only results in waste of heat of the flue gas, but also increases the amount of the flue gas, thereby increasing the cost of the rear-end processing equipment. Meanwhile, the rapid cooling (500-. Moreover, the moisture content in the flue gas at the outlet of the wet deacidification is high, so that the efficiency of the activated carbon adsorption bed is reduced, the working difficulty of the activated carbon adsorption bed is increased, in order to ensure that the discharged flue gas reaches the emission standard, equipment for removing water or improving the working efficiency of the adsorption bed is required to be added, and the running cost of the system is further increased.
Disclosure of Invention
In order to solve the problem that the operation cost of a system is too high due to unreasonable technology of the existing flue gas purification technology aiming at non-condensable gas, the invention provides an organic hazardous waste pyrolysis non-condensable incineration flue gas purification system, which can complete a purification process with lower system operation cost on the basis of ensuring that the flue gas reaches the emission standard. Meanwhile, the invention also discloses a method for purifying the incineration flue gas without condensing steam by pyrolyzing the organic hazardous waste.
The technical scheme of the invention is as follows: the utility model provides an organic danger is useless pyrolysis that does not condense burning gas cleaning system, it includes: the cooling device, the dust removal device and the deacidification device are sequentially connected and communicated with each other; an adsorption device is arranged on the flue between the cooling device and the dust removal device;
the method is characterized in that:
the cooling device is realized based on a waste heat boiler, and a hot gas inlet of the waste heat boiler is communicated with a smoke outlet of the non-condensable gas burning device; dust collector realizes based on the sack cleaner, deacidification device includes: the demister is arranged at the top of the wet deacidification tower; the adsorption device includes: the spraying device is arranged on a flue between the cooling device and the dust removal device; in the cooling device, the temperature of the flue gas is reduced to below 200 ℃.
A method for purifying organic hazardous waste pyrolysis non-condensed steam incineration flue gas is characterized by comprising the following steps:
s1: sending the flue gas to be treated into a waste heat boiler for cooling treatment;
s2: adsorbing dioxin and heavy metals in the flue gas to be treated by active carbon before the flue gas is sent into a bag-type dust collector after being cooled;
s3: after the flue gas to be treated enters the bag-type dust collector, the unreacted and complete activated carbon powder wrapped in the flue gas forms a layer of filter cake on the surface of the filter bag, and dioxin and heavy metals are continuously adsorbed; the adsorbed harmful impurities are discharged together with the dust collected by the bag-type dust collector;
s4: the flue gas to be treated after dust removal is sent into wet process deacidification tower, sets up in the tower and sprays, sprays the realization through sufficient circulation alkali lye to flue gas pollutants's deep purification, and wet process deacidification tower top sets up high-efficient defroster, carries out the defogging after handling, reaches emission standard to the flue gas to be treated.
According to the organic hazardous waste pyrolysis non-condensing incineration flue gas purification system provided by the invention, flue gas to be treated reaches the emission standard after sequentially passing through a cooling process, a dedusting process and a deacidification process; the cooling procedure in the method is realized based on the waste heat boiler, and a quenching cooling method is not adopted, so that the heat in the flue gas can be recycled to generate steam, the flue gas treatment capacity of rear-end equipment cannot be increased, and the operation cost of the system is greatly reduced; set up active carbon injection apparatus between exhaust-heat boiler and sack cleaner, on the realization dioxin and the heavy metal adsorption basis to, the active carbon powder that does not react completely enters into the sack cleaner along with the flue gas of treating, forms the one deck filter cake on the filter bag surface, continues to adsorb dioxin and heavy metal, has realized the high-efficient desorption to dioxin and heavy metal, ensures that the flue gas reaches the emission index.
Drawings
FIG. 1 is a schematic diagram of a system structure of a flue gas purification system according to the present invention.
Detailed Description
As shown in fig. 1, the present invention includes a system for purifying organic hazardous waste pyrolysis non-condensed steam incineration flue gas, which comprises: the cooling device, the dust removal device and the deacidification device are sequentially connected and communicated with each other; an adsorption device is arranged on the flue between the cooling device and the dust removal device.
In the method, the cooling device is realized based on the waste heat boiler 1, and the dust removing device is realized based on the bag-type dust remover 5.
The hot gas inlet of the waste heat boiler 1 is communicated with the smoke outlet (not marked in the figure) of the non-condensable gas burning device, in the waste heat boiler 1, high-temperature smoke with the temperature of about 500 ℃ is reduced to be below 200 ℃ by using the waste heat boiler, and meanwhile, steam is generated by using heat in the smoke, so that steam can be generated by using the heat in the smoke, the smoke treatment capacity of rear-end equipment cannot be increased, and the running cost of the system is greatly reduced.
The gas enters a waste heat boiler 1, and the waste heat boiler 1 is connected with a bag-type dust collector 5 through a flue 10. Adsorption equipment includes active carbon storehouse 2, dosing unit 3 and injection apparatus 4, and dosing unit 3 can control the volume of throwing of active carbon. The activated carbon is conveyed to a flue between the waste heat boiler 1 and the bag-type dust collector 5 through the injection device 4.
Deacidify the device includes: wet process deacidification tower 6 and defroster 7, defroster 7 sets up in wet process deacidification tower top. The bag-type dust remover 5 is connected with the wet-method deacidification tower 6 through a flue 10. The top of the wet deacidification tower 6 is provided with a high-efficiency demister 7 to remove water drops entrained in the flue gas. Two spraying layers for spraying alkali liquor are arranged in the wet deacidification tower 6. And the flue gas at the outlet of the wet deacidification tower 6 enters a chimney 9 through a draught fan 8.
The induced draft fan 8 is arranged at the outlet of the wet acid removal tower 6, so that the whole tail gas line can be ensured to be in a negative pressure state, the leakage of the flue gas is reduced, and the flue gas up to the standard is treated and finally discharged up to the standard through a chimney.
Based on the flue gas purification system, the method for purifying the incineration flue gas without condensing steam by pyrolyzing the organic hazardous waste is characterized by comprising the following steps of:
s1: sending the flue gas to be treated into a waste heat boiler 1 for cooling treatment;
s2: after cooling, before the flue gas to be treated is sent to a bag-type dust remover 5, activated carbon is sprayed into a flue between a waste heat boiler and the bag-type dust remover, the activated carbon is sent to a flue 10 between the waste heat boiler 1 and the bag-type dust remover 5 through a quantitative batching device 3 through a spraying device 4, and the sprayed activated carbon adsorbs harmful substances such as dioxin, heavy metals and the like in the flue gas;
s3: after the flue gas to be treated enters the bag-type dust collector 5, the unreacted and complete activated carbon powder wrapped in the flue gas forms a layer of filter cake on the surface of the filter bag, and dioxin and heavy metals are continuously adsorbed; the adsorbed harmful impurities and the dust collected by the bag-type dust collector 5 are collected by an ash hopper and discharged by ash discharge equipment;
s4: the flue gas to be treated after dust removal is sent into wet process deacidification tower, sets up in the tower to set up and sprays, sprays the realization through sufficient circulation alkali lye to flue gas pollutants's deep purification, and wet process deacidification tower top sets up high-efficient defroster 7, carries out the defogging after handling to the flue gas to be treated, reaches emission standard.
After the technical scheme of the invention is used, the waste heat boiler is adopted for cooling, so that the heat in the flue gas can be recycled to generate steam, the flue gas treatment capacity of rear-end equipment cannot be increased, meanwhile, the activated carbon injection and the bag-type dust collector are adopted, the dioxin in the flue gas can be efficiently removed, and the purification process is completed with lower system operation cost on the basis of ensuring that the flue gas reaches the emission standard.

Claims (2)

1. The utility model provides an organic danger is useless pyrolysis and is not condensed steam's burning gas cleaning system, it includes: the cooling device, the dust removal device and the deacidification device are sequentially connected and communicated with each other; an adsorption device is arranged on the flue between the cooling device and the dust removal device;
the method is characterized in that:
the cooling device is realized based on a waste heat boiler, and a hot gas inlet of the waste heat boiler is communicated with a smoke outlet of the non-condensable gas burning device; dust collector realizes based on the sack cleaner, deacidification device includes: the demister is arranged at the top of the wet deacidification tower; the adsorption device includes: the spraying device is arranged on a flue between the cooling device and the dust removal device; in the cooling device, the temperature of the flue gas is reduced to below 200 ℃.
2. A method for purifying organic hazardous waste pyrolysis non-condensed steam incineration flue gas is characterized by comprising the following steps:
s1: sending the flue gas to be treated into a waste heat boiler for cooling treatment;
s2: adsorbing dioxin and heavy metal in the flue gas by active carbon before the flue gas to be treated is sent into a bag-type dust collector after cooling;
s3: after the flue gas to be treated enters the bag-type dust collector, the unreacted and complete activated carbon powder wrapped in the flue gas forms a layer of filter cake on the surface of the filter bag, and dioxin and heavy metals are continuously adsorbed; the adsorbed harmful impurities are discharged together with the dust collected by the bag-type dust collector;
s4: the flue gas to be treated after dust removal is sent into wet process deacidification tower, sets up in the tower and sprays, sprays the realization through sufficient circulation alkali lye to flue gas pollutants's deep purification, and wet process deacidification tower top sets up high-efficient defroster, carries out the defogging after handling, reaches emission standard to the flue gas to be treated.
CN202210536453.0A 2022-05-18 2022-05-18 Organic hazardous waste pyrolysis non-condensing incineration flue gas purification system and purification method Pending CN114877362A (en)

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CN202210536453.0A CN114877362A (en) 2022-05-18 2022-05-18 Organic hazardous waste pyrolysis non-condensing incineration flue gas purification system and purification method

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Application Number Priority Date Filing Date Title
CN202210536453.0A CN114877362A (en) 2022-05-18 2022-05-18 Organic hazardous waste pyrolysis non-condensing incineration flue gas purification system and purification method

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CN114877362A true CN114877362A (en) 2022-08-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116899353A (en) * 2023-09-14 2023-10-20 广州松和环保科技股份有限公司 High-temperature flue gas purifying device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116899353A (en) * 2023-09-14 2023-10-20 广州松和环保科技股份有限公司 High-temperature flue gas purifying device
CN116899353B (en) * 2023-09-14 2023-12-05 广州松和环保科技股份有限公司 High-temperature flue gas purifying device

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