CN107497221A - A kind of exhaust gas purification system - Google Patents

A kind of exhaust gas purification system Download PDF

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Publication number
CN107497221A
CN107497221A CN201710591336.3A CN201710591336A CN107497221A CN 107497221 A CN107497221 A CN 107497221A CN 201710591336 A CN201710591336 A CN 201710591336A CN 107497221 A CN107497221 A CN 107497221A
Authority
CN
China
Prior art keywords
exhaust gas
purification
gas purification
spray washing
tail gas
Prior art date
Application number
CN201710591336.3A
Other languages
Chinese (zh)
Inventor
刘军亮
Original Assignee
湖南沃邦环保科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 湖南沃邦环保科技有限公司 filed Critical 湖南沃邦环保科技有限公司
Priority to CN201710591336.3A priority Critical patent/CN107497221A/en
Publication of CN107497221A publication Critical patent/CN107497221A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of devices for separating particles from gases or vapours
    • 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
    • B01D53/02Separation 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
    • 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • B01D53/507Sulfur oxides by treating the gases with other liquids
    • 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/54Nitrogen compounds
    • B01D53/56Nitrogen oxides
    • 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/64Heavy metals or compounds thereof, e.g. mercury
    • 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/78Liquid phase processes with gas-liquid contact
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10JPRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/02Fixed-bed gasification of lump fuel
    • C10J3/06Continuous processes
    • C10J3/16Continuous processes simultaneously reacting oxygen and water with the carbonaceous material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2247/00Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D2247/10Means for removing the washing fluid dispersed in the gas or vapours
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2253/00Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10Inorganic adsorbents
    • B01D2253/102Carbon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/18Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10JPRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00Details of gasification processes
    • C10J2300/09Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913Carbonaceous raw material
    • C10J2300/0946Waste, e.g. MSW, tires, glass, tar sand, peat, paper, lignite, oil shale

Abstract

The invention discloses a kind of exhaust gas purification system, the exhaust gas purification system includes spray washing system, charcoal absorption system and demister.The handling process of exhaust gas purification system comprises the following steps:Tail gas, which enters in cooling bay, to cool, and spray washing system is provided with cooling bay, and spray washing system carries out dedusting, purification, cooling treatment to tail gas;Then tail gas is adsorbed by charcoal absorption system again, tail gas clean-up, dust-removal and desulfurizing, heavy metal adsorption is removed;Then dehumidified again by demister, finally by tail gas qualified discharge.The exhaust gas purification system is reasonable in design, can be to the dust in flue gas, SO using spray washing and active carbon adsorption technology2, the pollutant component such as NOx and heavy metal effectively removed;Efflux gas is mixed into pyrolysis gasification furnace after caused tar liquid collection in spray washing cooling procedure with rubbish, reduces pollutant discharge amount.

Description

A kind of exhaust gas purification system
Technical field
The present invention relates to technical field of domestic garbage treatment, specifically a kind of exhaust gas purification system.
Background technology
As urbanization process is accelerated, domestic waste sharply increases, and the two of rubbish growing day by day and garbage disposal Secondary pollution causes new pollution to soil, water resource, air and environment for human survival and destroyed.Government dials wholesale fund and is used for every year Garbage disposal.Sanitary landfills:Need large area soil, the serious polluted underground water of silt liquid seepage and soil, the protection of blast also phase Work as complexity.Burning electricity generation:Calorific value requires high, and the requirement of rubbish quantity limits its application, bis- Evil wherein in flue gas English intractability is high.Compost:Higher is required to refuse classification, heavy metal pollution is difficult to control, and its another caused smell is smelly, needs It is selected in the large area soil of remote location.
High temperature anaerobic reductive cleavage refers to the course of reaction of organic matter heat resolve in the case where completely cutting off air conditionses.House refuse Mainly by material compositions such as stationery, metal, glass, plastics, detritus classes.By high temperature anaerobic reductive cleavage device, in biomass Polymer substance start to crack, generate gas mixture and charcoal.Mixture is divided into combustible gas and oil after supercooling.Rubbish High temperature anaerobic reductive cleavage treatment technology, not only thoroughly solve the problems, such as that garbage disposal is polluted again from environmental protection, also by people " waste " thought become regenerated resources.
Exhaust treatment system is the important component in domestic garbage treating system, and the effect of exhaust treatment system is pair Dust, SO in flue gas2, the pollutant component such as NOx and heavy metal effectively removed, but at existing exhaust treatment system Reason effect is poor, and tail gas can not qualified discharge;And waste water can not recycle caused by tail gas clean-up process, cause resource Waste.Therefore, the present invention provides a kind of exhaust treatment system.
The content of the invention
It is an object of the invention to provide a kind of exhaust gas purification system, to solve the problems mentioned in the above background technology.
To achieve the above object, the present invention provides following technical scheme:
A kind of exhaust gas purification system, the exhaust gas purification system include spray washing system, charcoal absorption system and removed Day with fog.
A kind of handling process of exhaust gas purification system, comprises the following steps:Tail gas, which enters in cooling bay, to cool, in cooling bay Provided with spray washing system, spray washing system carries out dedusting, purification, cooling treatment to tail gas;Then inhaled again by activated carbon Attached system is adsorbed to tail gas, and tail gas clean-up, dust-removal and desulfurizing, heavy metal adsorption are removed;Then dehumidified again by demister, Finally by tail gas qualified discharge.
As the further scheme of the present invention:Efflux gas caused tar liquid in spray washing cooling procedure is collected Enter after being mixed afterwards with rubbish in pyrolysis gasification furnace.
As the further scheme of the present invention:Spent shower water caused by vent gas treatment process is collected to sedimentation basin, and passed through Recycle-water is obtained after crossing precipitation purification processing,
As the further scheme of the present invention:The sedimentation basin bed mud enters pyrolysis after being mixed as recovered material with rubbish In gasification furnace.
As the further scheme of the present invention:The precipitation purification processing includes the processing of one-level precipitation purification, two-stage precipitation Purified treatment and the processing of three-level precipitation purification.
As the further scheme of the present invention:The pyrolysis gasification furnace from top to bottom be provided with drying layer, pyrolytic gasification layer and Burning zone.
As the further scheme of the present invention:The drying layer temperature is 120-160 DEG C, and the pyrolytic gasification layer temperature is 200-650℃;The burning zone temperature is 850-1100 DEG C.
Compared with prior art, the beneficial effects of the invention are as follows:
The exhaust gas purification system is reasonable in design, compact-sized, can be to flue gas using spray washing and active carbon adsorption technology In dust, SO2, the pollutant component such as NOx and heavy metal effectively removed;Then dehumidified by demister, finally will again Tail gas qualified discharge;Efflux gas mixes in spray washing cooling procedure after caused tar liquid is collected with rubbish, enters Pyrolysis gasification furnace reuses, and reduces pollutant discharge amount.
Brief description of the drawings
Fig. 1 is the process flow diagram of domestic garbage treating system.
Fig. 2 is the process flow diagram of exhaust gas purification system.
Embodiment
The technical scheme of this patent is described in more detail with reference to embodiment.
Refer to Fig. 1-2, a kind of domestic garbage treating system, including pyrolysis gasification system, slag removing system and tail gas clean-up System;The pyrolysis gasification system includes pyrolysis gasification furnace, and the pyrolysis gasification furnace is provided with drying layer, pyrolytic gasification from top to bottom Layer and burning zone;The slag removing system includes automatic de-ironing device and lime-ash storage device;The exhaust gas purification system includes spray Water wash system, charcoal absorption system and demister;
The technological process of the domestic garbage treating system includes:
(1) house refuse is directly over feeding trapezoidal chute feed mouth even into pyrolysis gasification furnace, in heat without sorting After the burner hearth bottom igniting for solving gasification furnace, house refuse starts to burn and discharges substantial amounts of heat, effect of the hot-air in air-introduced machine Lower and house refuse move toward one another, house refuse pass through drying layer, pyrolytic gasification layer and burning zone successively from top to bottom, and finally Produce harmless lime-ash;Fuel gas burns again through heat exchange Posterior circle to burning zone caused by pyrolytic gasification layer, improves system Heat recovery rate;The drying layer temperature is 120-160 DEG C, preferably 150 DEG C;The pyrolytic gasification layer temperature is 200- 650℃;The burning zone temperature is 850-1100 DEG C;
(2) harmless lime-ash carries out iron removaling by the automatic de-ironing device of slag removing system, and the lime-ash after processing is deposited by lime-ash Storage device stores, and the lime-ash of storage can be transported to the place needed to use;
(3) tail gas enters in exhaust gas purification system, carries out dedusting and cooling, tail gas clean-up cooling, dust-removal and desulfurizing, heavy metal Absorption and demister dehumidification operation;Tail gas, which enters in cooling bay, to cool, and spray washing system, spray washing are provided with cooling bay System carries out dedusting, purification, cooling treatment to tail gas;Then tail gas is adsorbed by charcoal absorption system again, so as to Tail gas clean-up cooling, dust-removal and desulfurizing, heavy metal adsorption removing are realized, can be to cigarette using spray washing and active carbon adsorption technology Dust, SO in gas2, the pollutant component such as NOx and heavy metal effectively removed;Then dehumidified again by demister, finally By tail gas qualified discharge;Efflux gas mixes in spray washing cooling procedure after caused tar liquid is collected with rubbish, enters Enter pyrolysis gasification furnace to reuse, reduce pollutant discharge amount;
(4) spent shower water caused by vent gas treatment process is collected to sedimentation basin, and by the processing of one-level precipitation purification, two Recycle-water is obtained after the processing of level precipitation purification, the processing operation of three-level precipitation purification, recycle-water can be repeated for spray washing system; Sedimentation basin bed mud enters pyrolysis gasification furnace after being mixed as recovered material with rubbish, realize and recycle.
The present invention operation principle be:In figure, solid line connecting line represents flue, and dotted line connecting line represents tar pipe Road, dashed connection line represent waterpipe.This technology is to be based on domestic garbage pyrolysis gasification principle, by pyrolytic gasification technique and pyrolysis A kind of middle-size and small-size scale application of city life garbage comprehensive utilization new technique of gas efficient burning process combination exploitation.This technology has Have and do not add the technical advantages such as auxiliary fuel, emission compliance, rubbish need not store classification, processing cost is low, floor space is small, its Cardinal principle refers under conditions of oxygen deprivation or anoxic, is occurred at high temperature using the thermal instability of wherein organic waste fractions Cracking, so as to deviate from volatile materials, eventually becomes combustible gas, tar liquid and a small amount of charcoal shape residue, combustible gas and tar Carry out oxygen-enriched combusting reuse.By regulating and controlling to oxygen-supplying amount, air inducing acc power, charging rate, deslagging rotating speed etc. in stove so that in stove It is stable to be divided into drying layer (150 DEG C), pyrolytic gasification layer (200-650 DEG C), burning zone (850-1100 DEG C).For county town and medium and small Application of city life garbage treatment scale, compared to sanitary landfills domestic garbage pyrolysis technology can maximumlly volume reduction, subtract matter, subtract bright Rate is up to more than 95%;Compared to compost, process cycle is short without being limited by house refuse component;Compared to directly burn, except Most heavy metal dissolves in lime-ash during pyrolytic gasification, reduces outside discharge capacity, bioxin and nitrogen, oxysulfide Control advantage is had more in discharge;It is wide in the absence of the strict demand of addressing, applicability compared to cement kiln synergic processing house refuse It is general.The domestic garbage treating system can realize wastewater zero discharge, and waste residue 100% utilizes, while exports thermal water resource.
The exhaust gas purification system is reasonable in design, compact-sized, can be to flue gas using spray washing and active carbon adsorption technology In dust, SO2, the pollutant component such as NOx and heavy metal effectively removed;Then dehumidified by demister, finally will again Tail gas qualified discharge;Efflux gas mixes in spray washing cooling procedure after caused tar liquid is collected with rubbish, enters Pyrolysis gasification furnace reuses, and reduces pollutant discharge amount.
, it is necessary to illustrate in the description of this exhaust gas purification system, unless otherwise clearly defined and limited, term " setting ", " connected " and " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or one Connect body;Can be joined directly together, can also be indirectly connected by intermediary, can be the connection of two element internals. For the ordinary skill in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
The better embodiment of this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment party Formula, can also be on the premise of this patent objective not be departed from one skilled in the relevant art's possessed knowledge Make a variety of changes.

Claims (8)

1. a kind of exhaust gas purification system, it is characterised in that the exhaust gas purification system includes spray washing system, charcoal absorption System and demister.
2. a kind of handling process of exhaust gas purification system as claimed in claim 1, it is characterised in that comprise the following steps:Tail Gas, which enters in cooling bay, to cool, and is provided with spray washing system in cooling bay, spray washing system to tail gas progress dedusting, purification, Cooling treatment;Then tail gas is adsorbed by charcoal absorption system again, tail gas clean-up, dust-removal and desulfurizing, heavy metal is inhaled Attached removing;Then dehumidified again by demister, finally by tail gas qualified discharge.
3. the handling process of exhaust gas purification system according to claim 2, it is characterised in that efflux gas is in spray washing Enter after caused tar liquid mixes after collecting with rubbish in cooling procedure in pyrolysis gasification furnace.
4. the handling process of exhaust gas purification system according to claim 2, it is characterised in that produce vent gas treatment process Spent shower water collect to sedimentation basin, and obtain recycle-water after precipitation purification is handled.
5. the handling process of exhaust gas purification system according to claim 4, it is characterised in that the sedimentation basin bed mud conduct Recovered material enters in pyrolysis gasification furnace after being mixed with rubbish.
6. the handling process of exhaust gas purification system according to claim 4, it is characterised in that the precipitation purification processing bag Include the processing of one-level precipitation purification, two-stage precipitation purified treatment and the processing of three-level precipitation purification.
7. the handling process of exhaust gas purification system according to claim 1, it is characterised in that the pyrolysis gasification furnace is from upper And have drying layer, pyrolytic gasification layer and burning zone.
8. the handling process of exhaust gas purification system according to claim 1, it is characterised in that the drying layer temperature is 120-160 DEG C, the pyrolytic gasification layer temperature is 200-650 DEG C;The burning zone temperature is 850-1100 DEG C.
CN201710591336.3A 2017-07-19 2017-07-19 A kind of exhaust gas purification system CN107497221A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110180869A (en) * 2019-06-19 2019-08-30 云南中贸环境节能科技投资股份有限公司 A kind of villages and small towns house refuse high-efficiency cleaning minimizing integrated conduct method
CN110339698A (en) * 2019-08-10 2019-10-18 亿利洁能科技(颍上)有限公司 A kind of processing method of boiler emission exhaust gas

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204320077U (en) * 2014-12-10 2015-05-13 湖北新洋丰肥业股份有限公司 A kind of apparatus for desulfurizing exhaust gas with ammonium sulfite solution filter
CN204745994U (en) * 2015-06-17 2015-11-11 盛铁丰 Exhaust -gas treatment equipment
CN105498431A (en) * 2016-01-29 2016-04-20 大连科林能源工程技术开发有限公司 Environmental protection treatment system for tail gas generated by wood fiber drying device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204320077U (en) * 2014-12-10 2015-05-13 湖北新洋丰肥业股份有限公司 A kind of apparatus for desulfurizing exhaust gas with ammonium sulfite solution filter
CN204745994U (en) * 2015-06-17 2015-11-11 盛铁丰 Exhaust -gas treatment equipment
CN105498431A (en) * 2016-01-29 2016-04-20 大连科林能源工程技术开发有限公司 Environmental protection treatment system for tail gas generated by wood fiber drying device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110180869A (en) * 2019-06-19 2019-08-30 云南中贸环境节能科技投资股份有限公司 A kind of villages and small towns house refuse high-efficiency cleaning minimizing integrated conduct method
CN110339698A (en) * 2019-08-10 2019-10-18 亿利洁能科技(颍上)有限公司 A kind of processing method of boiler emission exhaust gas

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