CN109028982A - A kind of secondary lead smelting exhaust ammonia process of desulfurization closed cycle system and sulfur method - Google Patents

A kind of secondary lead smelting exhaust ammonia process of desulfurization closed cycle system and sulfur method Download PDF

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Publication number
CN109028982A
CN109028982A CN201810752824.2A CN201810752824A CN109028982A CN 109028982 A CN109028982 A CN 109028982A CN 201810752824 A CN201810752824 A CN 201810752824A CN 109028982 A CN109028982 A CN 109028982A
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China
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ammonia
gas
tower
desulfurization
liquid
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CN201810752824.2A
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Chinese (zh)
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刘瀚洋
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界首市菁华科技信息咨询服务有限公司
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Priority to CN201810752824.2A priority Critical patent/CN109028982A/en
Publication of CN109028982A publication Critical patent/CN109028982A/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
    • B01D50/008Combinations of devices relating to groups B01D45/00 and B01D46/00 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
    • B01D53/1431Pretreatment by other processes
    • 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur 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
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75Multi-step processes
    • 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
    • B01D53/76Gas phase processes, e.g. by using aerosols
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B13/00Obtaining lead
    • C22B13/02Obtaining lead by dry processes
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/008Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/20Reductants
    • B01D2251/206Ammonium compounds
    • B01D2251/2062Ammonia
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/40Nitrogen compounds
    • B01D2257/406Ammonia
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/025Other waste gases from metallurgy plants

Abstract

The invention discloses a kind of secondary lead smelting exhaust ammonia process of desulfurization closed cycle systems, it mainly include smelting furnace, residual-heat exchanger, gravitational precipitator, sack cleaner, water washing gas wash tower, air compressor, gas-liquid separator, drying chamber, ammonia process desulfuration tower, ammonia absorption tower, circulation pipe, close smelting furnace end is equipped with O on the circulation pipe2It mouth is added, is cased with residual-heat exchanger on the gravitational precipitator, specific sulfur method is approximately as 1) secondary lead smelting;2) particle lead dust is recycled;3) gas compression separates;4) desulfurization process;5) ammonia absorbs;6) residual air recycles.The present invention realizes all smelting exhausts and only handles and recycle in closed system, no longer to airborne release, realizes zero-emission of the pollutant to atmosphere, reduces fume treatment difficulty, is most economical most clean and environmental protection sulfur method.

Description

A kind of secondary lead smelting exhaust ammonia process of desulfurization closed cycle system and sulfur method

Technical field

The invention belongs to secondary lead smelting environmental technology fields, and in particular to a kind of secondary lead smelting exhaust ammonia process of desulfurization envelope Closed loop system and sulfur method.

Background technique

The invention of lead-acid accumulator has more than 100 years history so far, it is in the world today using most extensive, most ancient Old battery system.Although lithium battery is favored by people deeply in recent years, lithium battery is at high cost, easy Fire explosion, and plumbic acid There are battery cheap, raw material to be easily obtained, and using above there is sufficient reliability, be suitable for being large current discharge and extensive Ambient temperature range, the advantages that recovery and utilization technology is mature, current 80% or more battery is still lead-acid accumulator, institute It is difficult to shake in widely applied dominance short-term in production and living with lead-acid accumulator.With lead-acid accumulator application Field is expanded, and the lead resource that lead-acid accumulator demand can also continue to increase, and manufacture lead-acid accumulator is finiteness, country Encouragement is recycled and is recycled to waste and old lead acid accumulator.During the reclaiming smelting of lead-acid accumulator, the lead of generation Dirt and SO2、SO3And the unordered exhaust emission of oxynitrides is serious, especially further relates to heavy metal lead, so country is to smelting Pollution control environmental requirement it is very high: to atmosphere discharge tail gas in SO2Content is no more than 150mg/m3, oxynitrides Content is no more than 200mg/m3, lead and its compound be no more than 2mg/m3, these standards are high, are all limit requirements, at present Domestic individual enterprises take caustic soda desulfurization, are as a result also stripped of the CO of flood tide in tail gas simultaneously2, make caustic soda consumption amount at multiplication Add, pollution treatment investment is caused to be higher than economic benefit, production is difficult to run, and most smelting enterprises take limewash desulfurization work Skill, desulfurization effect is not satisfactory, can only be close to national standard, it is difficult to reach and exceed national standard, many enterprises be exactly in order to Realize last micro processing, there are many pollution treatment increased costs, Business Economic Benefit influenced, so environmental protection is difficult to up to standard be always to make The about maximum bottleneck of industry development.

When using the ammonia process of desulfurization, it can enter smelting furnace doped with the ammonia of volatilization, Ammonia recovery in tail gas and be smelted, meeting Nitrogen oxides is generated, atmosphere is polluted.

Summary of the invention

The purpose of the present invention is to solve above-mentioned technical problem, and propose a kind of secondary lead smelting exhaust ammonia process of desulfurization Closed cycle system and its sulfur method, realize all smelting exhausts only in closed system handle and recycle, no longer to Airborne release realizes zero-emission of the pollutant to atmosphere, reduces fume treatment difficulty, is most economical most clean and environmental protection work Skill.

The present invention provides a kind of secondary lead smelting exhaust ammonia process of desulfurization closed cycle systems, mainly include smelting furnace, remaining Heat exchanger, gravitational precipitator, sack cleaner, water washing gas wash tower, air compressor, gas-liquid separator, drying chamber, ammonia process Desulfurizing tower, ammonia absorption tower, circulation pipe, the smelting furnace, gravitational precipitator, sack cleaner, water washing gas wash tower, air pressure Contracting machine, gas-liquid separator, ammonia process desulfuration tower, ammonia absorption tower are set gradually according to exhaust gas flow direction, the gas-liquid separator Side is equipped with drying chamber, and the pipeline between the gas-liquid separator and ammonia process desulfuration tower is equipped with exhaust fan, and the ammonia absorbs Tower exhaust outlet is linked into smelting furnace by circulation pipe, is equipped with O close to smelting furnace end on the circulation pipe2Mouth is added, it is described heavy Residual-heat exchanger is cased on inertia force precipitator.

As preferred means, the water washing gas wash tower includes that granular absorption storehouse, tail gas are passed through layer, dust sedimentation basin, remove Dirt water circulating pump, the water washing gas wash tower tower inner top are equipped with dedusting spray equipment, are connected to the first pipe on dedusting spray equipment First pipe is simultaneously passed into dust sedimentation basin by road, and first pipe is equipped with de-dusting cycle water pump.

As further preferred means, the air-water mixture to be formed is compressed through the air compressor and imports the gas-liquid Separator, by the isolated liquid CO containing moisture2The drying chamber is introduced by pipeline, utilizes quick lime water imbibition pair CO2Desiccant dehumidification obtains pure liquid CO2

A kind of secondary lead smelting exhaust ammonia method desulfurizing method, steps are as follows for specific method:

1) secondary lead smelting: reviver in lead-acid accumulator is added in smelting furnace, be passed through pure oxygen enrichment it is combustion-supporting, naturally Gas is smelted, and tail gas discharge is generated;

2) recycle particle lead dust: tail gas passes sequentially through gravitational precipitator, sack cleaner, water washing gas wash tower in step 1) Lead dust in tail gas is recycled;

3) gas compression separates: entering gas after air compressor compresses to lead dust tail gas after the recovery by step 2) Liquid/gas separator isolates liquid CO2, liquid CO2Drying chamber is flowed into liquid CO2In water absorption, gas-liquid separator is dried Separate liquid CO2After residual air is discharged;

4) desulfurization process: by separating liquid CO in step 3)2Residual air is passed through exhaust fan and is discharged to ammonia process desulfuration tower progress afterwards Desulfurization;

5) ammonia absorbs: the tail gas after desulfurization in step 4) is passed into ammonia absorption tower to volatilizing in ammonia process desulfuration tower The ammonia come is absorbed;

6) residual air recycles: the tail gas being discharged in step 5) is recycled by circulation pipe back to smelting furnace, in circulation pipe On O2Addition mouth is passed through pure oxygen combustion-supporting and natural gas enters smelting furnace and smelted.

As further preferred means, the residual-heat exchanger that is cased on the gravitational precipitator to the heat in tail gas into Row recycles.

Take pure oxygen enrichment combustion-supporting the invention has the advantages that: 1, for existing secondary lead smelting, oxynitrides is few, tail gas In mainly be rich in high temperature CO2、O2、S02、SO3、H2O ingredient first passes through three cleaners recycling lead after heat recovery Dirt makes CO using high pressure low temperature liquefaction fractionating process2Preferential liquefaction is realized and O2Separation, liquefying slow is O2With other trace gas Body, finally by remaining O2The non-thorough micropollution gas of desulfurization and dedusting is passed into ammonia desulfurizing process and carries out desulfurization, then It is absorbed using ammonia of the ammonia absorption tower to volatilization, reduction Ammonia recovery enters smelting furnace and smelted, and can generate nitrogen Oxide pollutes atmosphere, recycles back to smelting furnace.This technology realizes all smelting exhausts only closed Processing and circulation, no longer to airborne release, realize zero-emission of the pollutant to atmosphere in system, reduce fume treatment hardly possible Degree, is most economical most clean and environmental protection technique.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of secondary lead smelting exhaust ammonia process of desulfurization closed cycle system of the invention.

In figure: 1, smelting furnace;2, residual-heat exchanger;3, gravitational precipitator;31, ash hopper;4, sack cleaner;5, it washes Wash away chimney;51, granular absorption storehouse;52, tail gas is passed through layer;53, dust sedimentation basin;6, air compressor;7, gas-liquid separator; 8, drying chamber;9, exhaust fan;10, ammonia process desulfuration tower;11, ammonia absorption tower;12, circulation pipe;13,O2Mouth is added.

Specific embodiment

Present invention is further described in detail with reference to the accompanying drawing:

A kind of secondary lead smelting exhaust ammonia process of desulfurization closed cycle system of of the invention mainly includes smelting furnace 1, waste heat Exchanger 2, gravitational precipitator 3, sack cleaner 4, water washing gas wash tower 5, air compressor 6, gas-liquid separator 7, drying chamber 8, ammonia process desulfuration tower 10, ammonia absorption tower 11, circulation pipe 12, the smelting furnace 1, gravitational precipitator 3, sack cleaner 4, washing Chimney 5, air compressor 6, gas-liquid separator 7, ammonia process desulfuration tower 6, ammonia absorption tower 7 are washed away according to exhaust gas flow direction successively Setting, 7 side of gas-liquid separator is equipped with drying chamber 8, on the pipeline between the gas-liquid separator 7 and ammonia process desulfuration tower 10 Equipped with exhaust fan 9,11 exhaust outlet of ammonia absorption tower is linked into smelting furnace 1 by circulation pipe 12, on the circulation pipe 12 O is equipped with close to 1 end of smelting furnace2Mouth 13 is added, is cased with residual-heat exchanger 2 on the gravitational precipitator 3.

Dedusting is divided into gravitational dust collection, bag-type dusting and water washing dedusting, and the gravitational precipitator 3 is wave pipeline knot For recycling larger particles flue dust ash hopper 31 is arranged in the bottom of each wave, the sack cleaner 4 is for collecting in structure The tiny dust of partial size, the water washing gas wash tower 5 are quickly shuttled in 51 endoparticle gap of granular absorption storehouse using tail gas, Middle micronic dust, which is easily adsorbed by the particulate matter of surface wettability, carrys out further dedusting.

The air compressor 6 passes through compressed tail gas for CO2Preferential liquefaction, liquefied CO2It is carried out by gas-liquid separator 7 Separation.Isolate CO2Remaining residual air (remaining a small amount of CO after mainly unreacted oxygen and desulfurization and decarburization dedusting afterwards2、SO2 And micro lead dust) ammonia absorption tower 11 is discharged to by exhaust fan 9.

The water washing gas wash tower 5 is passed through layer 52, dust sedimentation basin 53, de-dusting cycle including granular absorption storehouse 51, tail gas Water pump, the 5 tower inner top of water washing gas wash tower are equipped with dedusting spray equipment, and first pipe is connected on dedusting spray equipment and is incited somebody to action First pipe is passed into dust sedimentation basin, and first pipe is equipped with de-dusting cycle water pump.

A kind of secondary lead smelting exhaust ammonia method desulfurizing method, steps are as follows for specific method:

1) secondary lead smelting: reviver in lead-acid accumulator is added in smelting furnace 1, is passed through pure oxygen and is enriched with combustion-supporting, day Right gas is smelted, and tail gas discharge is generated;

2) recycle particle lead dust: tail gas passes sequentially through gravitational precipitator 3, sack cleaner 4, water washing dedusting in step 1) Tower 5 recycles the lead dust in tail gas;

3) gas compression separates: entering after the compression of air compressor 6 by step 2) to lead dust tail gas after the recovery Gas-liquid separator 7 isolates liquid CO2, liquid CO2Drying chamber 8 is flowed into liquid CO2In water be dried absorption, gas-liquid point Liquid CO is separated from device 72After residual air is discharged;

4) desulfurization process: by separating liquid CO in step 3)2Afterwards residual air be passed through exhaust fan 9 be discharged to ammonia process desulfuration tower 10 into Row desulfurization;

5) ammonia absorbs: the tail gas after desulfurization in step 4) is passed into ammonia absorption tower 11 to waving in ammonia process desulfuration tower 10 The ammonia issued is absorbed;

6) residual air recycles: the tail gas being discharged in step 5) is recycled by circulation pipe 12 back to smelting furnace 1, is being recycled O on pipe 122Addition mouth 13 is passed through pure oxygen combustion-supporting and natural gas enters smelting furnace and smelted.

When in smelting furnace 1 to lead-acid accumulator reclaiming smelting, it is combustion-supporting to be passed through pure oxygen enrichment, so without nitrogen compound, tail CO is mainly rich in gas2、O2、S02、SO3, the tail gas after smelting is passed into gravitational precipitator 3, to the progress of larger particles substance Sedimentation, and contain amount of heat in tail gas, by residual-heat exchanger 2, by heat recovery and utilization, (residual-heat exchanger 2 is equipped with cold water Mouth and hot water or steam (vapor) outlet 22 is added, cold water is added mouth and is equipped with water supply pump 21, and cold water is pumped into waste heat and exchanged by water supply pump 21 In device 2), the tail gas after gravitational precipitator 3 has removed larger particles, which enters sack cleaner 4, carries out relatively small particle Dedusting, tail gas enters water washing gas wash tower 5 after sack cleaner 4, is passed through layer by tail gas and is passed through granular absorption storehouse 51, removes Water in pond is pumped into tower top spray head and sprays to granular absorption storehouse 51 by dirt water circulating pump 6, and the micronic dust not removed is in particle It adsorbs when quickly shuttling in the particulate interspaces in storehouse 51 by the granular absorption of surface wettability, the water to be got off again by spray later is flushed to In pond, and it is deposited to bottom of pond, except the tail gas (O after complete particle2、CO2With a small amount of SO2, vapor, CO) and it is passed into air compression Machine 6 compresses gas, and air compressor 6 isolates liquid using 7 isolation technics of gas-liquid separator, and liquid includes liquid CO2And water, the liquid isolated in gas-liquid separator 7 pour into drying chamber 8, the gas isolated introduces ammonia by exhaust fan 9 Method desulfurizing tower 10 carries out desulfurization, and tail gas is passed into ammonia absorption tower 11 after desulfurization in the ammonia process desulfuration tower 10, after absorbing ammonia The tail gas of discharge is passed into smelting furnace 1 by circulation pipe 12 and carries out circulation smelting, and mouth 13 is added in oxygen and is passed through pure oxygen and day Right gas can not only be effectively reduced pollution treatment cost no longer to airborne release, but also greatly reduce pollution control difficulty, from And zero-emission of the pollutant to atmosphere is realized, breach environmentally friendly bottleneck.

It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.

In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiments being understood that.

The present invention is not limited to above to the description of embodiment, the content that those skilled in the art disclose according to the present invention, The improvement and modification that need not be carried out by creative work on the basis of the present invention, all should protection scope of the present invention it It is interior.

Claims (5)

1. a kind of secondary lead smelting exhaust ammonia process of desulfurization closed cycle system, it is characterised in that: mainly include smelting furnace (1), remaining Heat exchanger (2), gravitational precipitator (3), sack cleaner (4), water washing gas wash tower (5), air compressor (6), gas-liquid point From device (7), drying chamber (8), ammonia process desulfuration tower (10), ammonia absorption tower (11), circulation pipe (12), the smelting furnace (1), gravity Deduster (3), sack cleaner (4), water washing gas wash tower (5), air compressor (6), gas-liquid separator (7), the ammonia process of desulfurization Tower (6), ammonia absorption tower (7) are set gradually according to exhaust gas flow direction, and gas-liquid separator (7) side is equipped with drying chamber (8), the pipeline between the gas-liquid separator (7) and ammonia process desulfuration tower (10) is equipped with exhaust fan (9), the ammonia absorption tower (11) exhaust outlet is linked into smelting furnace (1) by circulation pipe (12), is equipped on the circulation pipe (12) close to smelting furnace (1) end O2It is added mouth (13), is cased with residual-heat exchanger (2) on the gravitational precipitator (3).
2. a kind of secondary lead smelting exhaust ammonia process of desulfurization closed cycle system according to claim 1, it is characterised in that: institute Stating water washing gas wash tower (5) includes that granular absorption storehouse (51), tail gas are passed through layer (52), dust sedimentation basin (53), de-dusting cycle water Pump, water washing gas wash tower (5) the tower inner top are equipped with dedusting spray equipment, and first pipe is connected on dedusting spray equipment and is incited somebody to action First pipe is passed into dust sedimentation basin (53), and first pipe is equipped with de-dusting cycle water pump.
3. a kind of secondary lead smelting exhaust ammonia process of desulfurization closed cycle system according to claim 1, it is characterised in that: warp The air-water mixture that air compressor (6) compression is formed imports the gas-liquid separator (7), and isolated is contained water The liquid CO divided2The drying chamber (8) are introduced by pipeline, using quick lime water imbibition to CO2Desiccant dehumidification obtains pure liquid CO2
4. a kind of secondary lead smelting exhaust ammonia method desulfurizing method, it is characterised in that: steps are as follows for specific method:
1) secondary lead smelting: reviver in lead-acid accumulator is added in smelting furnace (1), and it is combustion-supporting to be passed through pure oxygen enrichment, naturally Gas is smelted, and tail gas discharge is generated;
2) recycle particle lead dust: tail gas passes sequentially through gravitational precipitator (3), sack cleaner (4), water washing dedusting in step 1) Tower (5) recycles the lead dust in tail gas;
3) gas compression separates: entering gas after air compressor (6) compression to lead dust tail gas after the recovery by step 2) Liquid/gas separator (7) isolates liquid CO2, liquid CO2Drying chamber (8) is flowed into liquid CO2In water absorption, gas-liquid is dried Separator (7) separates liquid CO2After residual air is discharged;
4) desulfurization process: by separating liquid CO in step 3)2Afterwards residual air be passed through exhaust fan (9) be discharged to ammonia process desulfuration tower (10) into Row desulfurization;
5) ammonia absorbs: the tail gas after desulfurization in step 4) is passed into ammonia absorption tower (11) to waving in ammonia process desulfuration tower (10) The ammonia issued is absorbed;
6) residual air recycles: the tail gas being discharged in step 5) is recycled by circulation pipe (12) back to smelting furnace (1), is being recycled Manage the O on (12)2Addition mouth (13) is passed through pure oxygen combustion-supporting and natural gas enters smelting furnace and smelted.
5. a kind of secondary lead smelting exhaust ammonia method desulfurizing method according to claim 4, it is characterised in that: the gravity removes The residual-heat exchanger (2) being cased on dirt device (3) is recycled the heat in tail gas.
CN201810752824.2A 2018-07-10 2018-07-10 A kind of secondary lead smelting exhaust ammonia process of desulfurization closed cycle system and sulfur method CN109028982A (en)

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CN101423214A (en) * 2008-11-20 2009-05-06 武汉凯迪电力环保有限公司 Method for catching carbon dioxide in generating plant flue gas by ammonia process and equipment thereof
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CN205372595U (en) * 2016-01-19 2016-07-06 中国神华能源股份有限公司 A system and boiler system for following draw CO2 in burning flue gas

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Application publication date: 20181218