CN110327762A - A kind of flue gas minimum discharge integrated processing system - Google Patents
A kind of flue gas minimum discharge integrated processing system Download PDFInfo
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- CN110327762A CN110327762A CN201910628773.7A CN201910628773A CN110327762A CN 110327762 A CN110327762 A CN 110327762A CN 201910628773 A CN201910628773 A CN 201910628773A CN 110327762 A CN110327762 A CN 110327762A
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- 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
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
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- 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
- B01D53/508—Sulfur oxides by treating the gases with solids
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- 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
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
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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
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- 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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Abstract
The invention discloses a kind of flue gas minimum discharge integrated processing systems, it is related to fume treatment technical field, including passing through the sequentially connected recirculating fluidized bed of flue, cyclone dust collectors, waste heat boiler, chilling tower, bag filter and desulfurizing tower, gas inlet and deacidification agent adding mouth are offered on the recirculating fluidized bed, the waste heat boiler includes the expansion chamber set gradually along flow of flue gas direction, high-temperature residual heat boiler and low temperature exhaust heat boiler, the smoke inlet of the expansion chamber and the outlet flue of cyclone dust collectors connect, the outlet flue of the low temperature exhaust heat boiler is connect with the smoke inlet of chilling tower, temperature lowering water atomizer is provided in the chilling tower, doctor solution spray head is provided in the desulfurizing tower；Treated that flue gas complies fully with discharge standard by the present invention, and wastage is few.
Description
Technical field
The present invention relates to fume treatment technical fields, more particularly to a kind of flue gas minimum discharge integrated processing system.
Background technique
Industrial rapid development brings the serious pollution to environment, and the major pollutants of atmosphere are dust, SOXWith
NOXGas etc..Currently, the whole world is discharged into every year in the pollutant of atmosphere, and more than 100,000,000 tons of dust, SO2100015000 tons, and I
The flue dust that the boiler and stove of the existing industry of state and life are discharged into atmosphere every year just has 14,000,000 tons, SO2There are 2070 tons.In China
SO2Discharge has caused many areas serious acid rain phenomenon occur, and annual economic loss resulting from is at 100,000,000,000 yuan
More than.Present atmosphere polluting problem is solved, the ecological environment of the entire earth is protected, has become and is related to the big of descendants's happiness
Problem.
Existing smoke processing system generates more waste material during processing, and discharge amount is larger, and fume treatment cost
Higher, treated, and flue gas is more difficult that discharge standard is fully achieved.
Summary of the invention
The technical problem to be solved by the present invention is to the shortcomings that overcoming the prior art, provide a kind of flue gas minimum discharge one
Body processing system.
In order to solve the above technical problems, technical scheme is as follows:
A kind of flue gas minimum discharge integrated processing system, including pass through the sequentially connected recirculating fluidized bed of flue, cyclone dust removal
Device, waste heat boiler, chilling tower, bag filter and desulfurizing tower offer gas inlet and de- on the recirculating fluidized bed
Sour agent adding mouth, the waste heat boiler include the expansion chamber, high-temperature residual heat boiler and low temperature set gradually along flow of flue gas direction
Waste heat boiler, the smoke inlet of the expansion chamber and the outlet flue of cyclone dust collectors connect, the outlet flue of the low temperature exhaust heat boiler
It is connect with the smoke inlet of chilling tower, temperature lowering water atomizer is provided in the chilling tower, is provided with desulfurization in the desulfurizing tower
Liquid spray head.
It further, further include flue gas heater, the smoke inlet of flue gas heater is connect with the outlet flue of the desulfurizing tower.
A kind of preceding flue gas minimum discharge integrated processing system is provided with steam conveying pipe on waste heat boiler,
Steam conveying pipe is connect with flue gas heater, is flue gas heater heat supply.
A kind of preceding flue gas minimum discharge integrated processing system, gas inlet are located at the bottom of recirculating fluidized bed,
And gas inlet is connect with the Venturi tube being located in recirculating fluidized bed, deacidification agent adding mouth is towards the end of Venturi tube.
A kind of preceding flue gas minimum discharge integrated processing system, chilling tower are downflow type spray column, downflow type spray
The smoke inlet and temperature lowering water atomizer that drench tower are respectively positioned on the top of downflow type spray column.
A kind of preceding flue gas minimum discharge integrated processing system, the cigarette between chilling tower and bag filter
Be provided with powderject adding set on road, powderject adding set include feed hopper, the injector being connect with feed hopper with
And the blower for injector gas supply, the end of injector extends in flue.
A kind of preceding flue gas minimum discharge integrated processing system, desulfurizing tower is interior to be set below doctor solution spray head
It is equipped with stainless steel helices layer.
A kind of flue gas minimum discharge integral treatment method, comprising the following steps:
S1: high-temperature flue gas is entered in recirculating fluidized bed by gas inlet, sprays into recirculating fluidized bed after Venturi tube accelerates, and with it is de-
The pulverized limestone that sour agent adding mouth is added is sufficiently mixed reaction, realizes deacidifying flue gas；
S2: the high-temperature flue gas after depickling enters in cyclone dust collectors, twist moves downward, and sloughs the dust in high-temperature flue gas
Impurity, subsequent high-temperature flue gas enter in waste heat boiler, carry out heat exchange with the water in waste heat boiler, realize the drop of high-temperature flue gas
Temperature, while recovery waste heat, for heating water, water is heated into after vapor and is delivered to flue gas heater by steam conveying pipe, together
When, the flue gas after cooling enters in chilling tower；
S3: flue gas mixes after entering chilling tower with the water after atomization, sufficiently carries out vapour-gas heat exchange, and water evaporates rapidly, make flue gas into
The cooling of one step, while flue gas is washed, dedusting, the fallout of generation is discharged by the discharge valve of chilling tower bottom, and flue gas
Into in the flue between chilling tower and bag filter；
S4: powdered activated carbon is first added into flue by powderject adding set, mixes progress just with flue gas in flue
Step absorption, then slaked lime powder is added into flue by powderject adding set, slaked lime powder is mixed with flue gas, and dry method is sloughed
Most sour gas, neutral flying dust and amount of activated powdered carbon, slaked lime powder after reaction are removed with flue gas into cloth bag
Dirt device enters in desulfurizing tower after bag filter dedusting；
S5: flue gas is sufficiently mixed in desulfurizing tower with sodium hydroxide doctor solution, the sour gas that removal front end does not completely remove
With deleterious acidic substance, subsequently enter in flue gas heater；
S6: flue gas heater heats flue gas, can be emitted into atmosphere after removing steam, complete the processing to flue gas.
A kind of preceding flue gas minimum discharge integral treatment method, high-temperature flue gas temperature after waste heat boiler are down to
550 DEG C, into chilling tower after temperature be down to 200 DEG C hereinafter, and flue gas 200-550 DEG C of temperature drop area residence time be less than 1s.
The beneficial effects of the present invention are:
(1) present invention first carries out preliminary depickling to flue gas using recirculating fluidized bed, is then carried out by cyclone dust collectors to flue gas
Dedusting, while can remove the deacidification agent being mingled in flue gas, then cool down to high-temperature flue gas by waste heat boiler, while sufficiently
Recovery waste heat later further cools down to flue gas using chilling tower, then carries out secondary remove to flue gas by bag filter
Dirt finally enters and carries out desulfurization in desulfurizing tower, and making that treated, flue gas complies fully with discharge standard；
(2) present invention also sets up flue gas heater after desulfurizing tower, can heat to the flue gas after desulfurizing tower desulfurization, avoid taking off
Flue gas in sulphur tower after wet desulphurization contains a large amount of steam and forms white cigarette in discharge outlet, pollutes to ambient enviroment, together
When, it also can avoid the normal work that flue gas causes condensed water after air-introduced machine and influences air-introduced machine；
(3) steam conveying pipe is arranged in the present invention on waste heat boiler, and connect with flue gas heater, the height that waste heat boiler generates
Warm steam can be flue gas heater heat supply, make full use of thermal energy, reduce operating cost；
(4) bottom of recirculating fluidized bed is arranged in gas inlet in the present invention, and flue gas is entered by the bottom of recirculating fluidized bed, and is passed through
After crossing Venturi tube acceleration, it is sufficiently mixed and reacts with deacidification agent in end, during flue gas entrainment deacidification agent moves up, due to
Deacidification agent is heavier, constantly there is deacidification agent whereabouts, falls at Venturi tube and is blown afloat, under circulating fluid bed reactor
Portion's formation emulsion zone, top formation dilute-phase zone, guarantee flue gas and deacidification agent come into full contact with；
(5) it uses downflow type spray column as chilling tower in the present invention, ensure that the rate of temperature fall of flue gas, make flue gas in 200-
550 DEG C of temperature drop area residence times are less than 1s, to avoid the temperature section that dioxin synthesizes again, reach and inhibit dioxin regeneration
Purpose；Simultaneously can also cleaning dust be carried out to flue gas；
(6) it is provided with powderject adding set on flue of the present invention between chilling tower and bag filter, it can be by this
Powderject adding set adds powdered activated carbon and slaked lime powder into flue, active carbon can to the harmful substance in flue gas into
After row is preliminary to be adsorbed, and dioxin-like chemical is easily tightly held by activated carbon under low temperature (180 DEG C), and flue gas is discharged by chilling tower
Temperature meet the temperature requirement；Slaked lime powder can be sufficiently mixed with acid gas in flue gas, and dry method sloughs most acidity
Gas；The bag filter being arranged after the flue can effectively remove the powdered activated carbon carried secretly in flue gas and slaked lime powder and
Neutral flying dust is convenient for subsequent wet desulphurization effectively to flue gas ash removal；
(7) stainless steel helices layer is arranged positioned at the lower section of doctor solution spray head in desulfurizing tower in the present invention, and doctor solution flows from top to bottom
Through filler, liquid film is formed in filler surface, is come into full contact with when the flue gas of rising flows through with liquid film, achievees the effect that desulfurization, guaranteed
The quality of desulfurization makes the flue gas of discharge meet discharge standard.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram of powderject adding set；
Wherein: 1, recirculating fluidized bed；2, cyclone dust collectors；3, waste heat boiler；4, chilling tower；5, bag filter；6, desulfurizing tower；
7, flue；8, gas inlet；9, deacidification agent adding mouth；10, flue gas heater；11, steam conveying pipe；12, feed hopper；13,
Injector；14, blower；15, temperature lowering water atomizer；16, doctor solution spray head；17, stainless steel helices layer；18, powderject adds
Feeder apparatus.
Specific embodiment
It is right below according to specific embodiment and in conjunction with attached drawing to make the contents of the present invention be easier to be clearly understood
The present invention makes further details of explanation.
Present embodiments provide a kind of flue gas minimum discharge integrated processing system, referring to Fig. 1, including by flue 7 according to
Recirculating fluidized bed 1, cyclone dust collectors 2, waste heat boiler 3, chilling tower 4, bag filter 5 and the desulfurizing tower 6 of secondary connection.
Gas inlet 8 is offered in the bottom of recirculating fluidized bed 1, is provided with and gas inlet 8 in 1 bottom of recirculating fluidized bed
The Venturi tube of connection, high-temperature flue gas is by external blower 14 and is delivered to gas inlet 8, and recycle stream is entered after Venturi tube
Change in bed 1.It is also provided with deacidification agent adding mouth 9 on recirculating fluidized bed 1, opens deacidification agent adding mouth 9 and is located in recirculating fluidized bed 1
One end towards the upper end of Venturi tube.Deacidification agent can be used pulverized limestone and be pressed from both sides after pulverized limestone enters in recirculating fluidized bed 1 by flue gas
Band moves up, and during moving up, since pulverized limestone is heavier, constantly there is pulverized limestone whereabouts, falls to close to Venturi tube
Place is blown afloat again, forms emulsion zone in the lower part of 1 reactor of recirculating fluidized bed, dilute-phase zone is formed at top, keeps large quantities of lime powder outstanding
Float in the flue gas of flowing, guarantee coming into full contact with for flue gas and pulverized limestone, preliminary depickling is carried out to flue gas.By recirculating fluidized bed
Flue gas after 1 is entered in cyclone dust collectors 2 by flue 7.
After flue gas enters cyclone dust collectors 2, flue gas becomes circular motion by moving along a straight line, and the flue gas of rotation is along wall and circle
Cylinder is helically downward, and flue gas generates centrifugal force in rotary course, and the dust granule that density is greater than gas is got rid of to wall, ash
Dirt particle is once contacted with wall, just loses inertia and the power of entrance velocity and downward gravity is leaned on to fall along wall surface, is entered
In dust storage chamber, and flue gas is persistently spinned flowing, and cyclone dust collectors 2 are discharged in the flue gas after last dedusting, enters waste heat through flue 7
In boiler 3.
After flue gas enters waste heat boiler 3, it is introduced into expansion chamber, reduces the dust concentration in flue gas, avoids heat exchange blockage,
Subsequent flue gas sequentially enters high-temperature residual heat boiler 3 and low temperature exhaust heat boiler 3, heats, makes to the industry water in waste heat boiler 3
Cooling high-temperature fume.Entered in downflow type spray column by the flue gas of waste heat boiler 3 by flue 7.
Flue gas after cooling is entered by the tower top of downflow type spray column, and flue gas is evenly distributed in tower after distribution device
It is interior.The multiple temperature lowering water atomizers 15 being arranged at the top of downflow type spray column will be sprayed in tower after cooling water atomization, with flue gas
It directly contacts, makes flue-gas temperature dramatic decrease, dioxin can be avoided in the temperature section of synthesis.Flue gas removes during chilling
Cooling, there are also washings, the effect of dedusting.A part of flying dust of removing sprays tower bottom from downflow type and is discharged by discharge valve,
And the flue gas after cooling down again enters in flue 7.
It is provided with powderject adding set 18 on flue 7 between downflow type spray column and bag filter 5, referring to
Fig. 2, powderject adding set 18 include feed hopper 12, the injector 13 connecting with feed hopper 12 and supply for injector 13
Blower 14, the end of injector 13 extends in flue 7, feed is added in feed hopper 12, subsequently enter in injector 13,
Blower 14 is supplied to injector 13, then will be in feed injection to flue 7.
Two powderject adding sets 18 can be set on this section of flue 7.In the powder spray close to downflow type spray column
It penetrates in adding set 18 and adds powdered activated carbon, add niter in the powderject adding set 18 close to bag filter 5
Ashes, active carbon can tentatively adsorb the harmful substance in flue gas, and slaked lime powder can be sufficiently mixed with acid gas in flue gas
It closes, dry method sloughs most sour gas.Flue gas enters in bag filter 5 by the flue 7, laggard by bag-type dust
Enter in desulfurizing tower 6.
It after flue gas enters in desulfurizing tower 6, is mixed with the sodium hydroxide solution being sprayed in desulfurizing tower 6, removal front end is not complete
The sour gas and deleterious acidic substance got rid of entirely, subsequently enter in flue gas heater 10.Wherein, it is located in desulfurizing tower 6
Stainless steel helices layer 17 is arranged in the lower section of doctor solution spray head 16, and doctor solution flows through filler from top to bottom, forms liquid in filler surface
Film comes into full contact with when the flue gas of rising flows through with liquid film, achievees the effect that desulfurization, ensure that the quality of desulfurization.
After flue gas enters flue gas heater 10,130 DEG C or so are heated to, the moisture in flue gas is sloughed, is finally emitted into
In atmosphere.In addition, being additionally provided with steam conveying pipe 11 on waste heat boiler 3, the high-temperature steam generated after industry water heating is logical
It crosses steam conveying pipe 11 to be delivered in flue gas heater 10, high-temperature steam can make full use of heat to 10 heat supply of flue gas heater
Can, reduce operating cost.
The present embodiment additionally provides a kind of flue gas minimum discharge integral treatment method, comprising the following steps:
S1: high-temperature flue gas is entered in recirculating fluidized bed 1 by gas inlet 8, and recirculating fluidized bed 1 is sprayed into after Venturi tube accelerates, and
It is sufficiently mixed and reacts with the pulverized limestone that deacidification agent adding mouth 9 is added, realize deacidifying flue gas；
S2: the high-temperature flue gas after depickling enters in cyclone dust collectors 2, twist moves downward, and sloughs the powder in high-temperature flue gas
Trifle in the world matter, subsequent high-temperature flue gas enter in waste heat boiler 3, carry out heat exchange with the water in waste heat boiler 3, realize high-temperature flue gas
Cooling, while recovery waste heat is heated into after vapor for heating water, water and is delivered to flue gas by steam conveying pipe 11
Device 10, meanwhile, the flue gas after cooling enters in chilling tower 4；
S3: flue gas mixes after entering chilling tower 4 with the water after atomization, sufficiently carries out vapour-gas heat exchange, and water evaporates rapidly, makes flue gas
Further cooling, while flue gas is washed, dedusting, the fallout of generation is discharged by the discharge valve of 4 bottom of chilling tower, and cigarette
Gas enters in the flue 7 between chilling tower 4 and bag filter 5, wherein high-temperature flue gas temperature after waste heat boiler 3 is down to
550 DEG C, into chilling tower 4 after temperature be down to 200 DEG C hereinafter, and flue gas 200-550 DEG C of temperature drop area residence time be less than 1s,；
S4: powdered activated carbon is first added into flue 7 by powderject adding set 18, is mixed into flue 7 with flue gas
The preliminary absorption of row, then slaked lime powder is added into flue 7 by powderject adding set 18, slaked lime powder is mixed with flue gas,
Dry method sloughs most sour gas, the neutral flying dust and amount of activated powdered carbon, slaked lime powder after reaction with flue gas into
Enter bag filter 5, enters in desulfurizing tower 6 after 5 dedusting of bag filter；
S5: flue gas is sufficiently mixed in desulfurizing tower 6 with sodium hydroxide doctor solution, the sour gas that removal front end does not completely remove
With deleterious acidic substance, subsequently enter in flue gas heater 10；
S6: flue gas heater 10 heats flue gas, can be emitted into atmosphere after removing steam, complete the processing to flue gas.
Through processing system of the invention, treated that flue gas complies fully with discharge standard.
In addition to the implementation, the present invention can also have other embodiments；It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (9)
1. a kind of flue gas minimum discharge integrated processing system, it is characterised in that: including passing through flue (7) sequentially connected circulation
Fluidized bed (1), cyclone dust collectors (2), waste heat boiler (3), chilling tower (4), bag filter (5) and desulfurizing tower (6),
Gas inlet (8) and deacidification agent adding mouth (9) are offered on the recirculating fluidized bed (1),
The waste heat boiler (3) includes more than the expansion chamber set gradually along flow of flue gas direction, high-temperature residual heat boiler (3) and low temperature
The smoke inlet of heat boiler (3), the expansion chamber is connect with the outlet flue of cyclone dust collectors (2), the low temperature exhaust heat boiler (3)
Outlet flue is connect with the smoke inlet of chilling tower (4),
Temperature lowering water atomizer (15) are provided in the chilling tower (4),
Doctor solution spray head (16) are provided in the desulfurizing tower (6).
2. a kind of flue gas minimum discharge integrated processing system according to claim 1, it is characterised in that: further include flue gas
The smoke inlet of heater (10), the flue gas heater (10) is connect with the outlet flue of the desulfurizing tower (6).
3. a kind of flue gas minimum discharge integrated processing system according to claim 2, it is characterised in that: the waste heat pot
It is provided on furnace (3) steam conveying pipe (11), the steam conveying pipe (11) connect with flue gas heater (10), is flue gas
Heater (10) heat supply.
4. a kind of flue gas minimum discharge integrated processing system according to claim 1, it is characterised in that: the flue gas into
Mouth (8) is located at the bottom of recirculating fluidized bed (1), and the gas inlet (8) connects with the Venturi tube being located in recirculating fluidized bed (1)
It connects, the deacidification agent adding mouth (9) is towards the end of Venturi tube.
5. a kind of flue gas minimum discharge integrated processing system according to claim 1, it is characterised in that: the chilling tower
It (4) is downflow type spray column, the smoke inlet and temperature lowering water atomizer (15) of the downflow type spray column are respectively positioned on downflow type
The top of spray column.
6. a kind of flue gas minimum discharge integrated processing system according to claim 1, it is characterised in that: be located at the urgency
Powderject adding set (18), the powderject are provided on flue (7) between cold tower (4) and bag filter (5)
Adding set (18) includes feed hopper (12), the injector (13) connecting with feed hopper (12) and supplies for injector (13)
Blower (14), the end of the injector (13) extend in flue (7).
7. a kind of flue gas minimum discharge integrated processing system according to claim 1, it is characterised in that: the desulfurizing tower
(6) it is located at below doctor solution spray head (16) in and is provided with stainless steel helices layer (17).
8. one kind is based on flue gas minimum discharge integral treatment method as claimed in claim 1 to 7, it is characterised in that: including
Following steps:
S1: high-temperature flue gas is entered in recirculating fluidized bed (1) by gas inlet (8), sprays into recirculating fluidized bed after Venturi tube accelerates
(1), it and is sufficiently mixed and reacts with the pulverized limestone that deacidification agent adding mouth (9) are added, realize deacidifying flue gas；
S2: the high-temperature flue gas after depickling enters in cyclone dust collectors (2), twist moves downward, sloughs in high-temperature flue gas
Dust impurities, subsequent high-temperature flue gas enter in waste heat boiler (3), carry out heat exchange with the water in waste heat boiler (3), realize high temperature
The cooling of flue gas, while recovery waste heat is delivered to after being heated into vapor by steam conveying pipe (11) for heating water, water
Flue gas heater (10), meanwhile, the flue gas after cooling enters in chilling tower (4)；
S3: flue gas enters chilling tower (4) and mixes afterwards with the water after atomization, sufficiently carries out vapour-gas heat exchange, and water evaporates rapidly, makes cigarette
Gas further cools down, while being washed to flue gas, dedusting, and the fallout of generation is discharged by the discharge valve of chilling tower (4) bottom,
And flue gas enters in the flue (7) between chilling tower (4) and bag filter (5)；
S4: by powderject adding set (18) first to adding powdered activated carbon in flue (7), in flue (7) and flue gas
Mixing is tentatively adsorbed, then by powderject adding set (18) to adding slaked lime powder in flue (7), slaked lime powder and
Flue gas mixing, dry method slough most sour gas, and the neutral flying dust and amount of activated powdered carbon, slaked lime powder after reaction are with cigarette
Gas enters bag filter (5) together, enters in desulfurizing tower (6) after bag filter (5) dedusting；
S5: flue gas is sufficiently mixed in desulfurizing tower (6) with sodium hydroxide doctor solution, the sour gas that removal front end does not completely remove
Body and deleterious acidic substance subsequently enter in flue gas heater (10)；
S6: flue gas heater (10) heats flue gas, can be emitted into atmosphere after removing steam, complete the processing to flue gas.
9. a kind of flue gas minimum discharge integral treatment method according to claim 8, it is characterised in that: high-temperature flue gas warp
Crossing waste heat boiler (3), temperature is down to 550 DEG C afterwards, into chilling tower (4) afterwards temperature be down to 200 DEG C hereinafter, and flue gas in 200-550
DEG C temperature drop area residence time is less than 1s.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776345A (en) * | 2021-10-08 | 2021-12-10 | 中冶南方都市环保工程技术股份有限公司 | Efficient power generation system using flue gas waste heat of electric furnace |
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