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 PDFInfo
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- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/10—Combinations of devices covered by groups B01D45/00, B01D46/00 and B01D47/00
-
- 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
- B01D53/14—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 absorption
- B01D53/1431—Pretreatment by other processes
-
- 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
- B01D53/14—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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B13/00—Obtaining lead
- C22B13/02—Obtaining lead by dry processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/406—Ammonia
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- 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
- B01D2258/025—Other 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
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.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112076599A (en) * | 2020-09-07 | 2020-12-15 | 中国神华煤制油化工有限公司 | Ammonia process based desulfurization zero-emission method and system |
| CN113069901A (en) * | 2021-04-15 | 2021-07-06 | 江苏乾宏能源科技有限公司 | Desulfurizing tower for semidry flue gas purification of circulating fluidized bed and purification method |
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| JP2003299985A (en) * | 2002-04-10 | 2003-10-21 | Jfe Steel Kk | Exhaust gas treatment method in sintering machine |
| 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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| CN102425789A (en) * | 2011-11-03 | 2012-04-25 | 华北电力大学（保定） | Coal-fired fluidized bed micro oxygen rich combustion CO2 emission reduction method and system |
| CN103953921A (en) * | 2014-04-22 | 2014-07-30 | 东方电气集团东方锅炉股份有限公司 | Oxygen-enriched combustion boiler system and operation method 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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