CN110327758A - A kind of tin smelts smoking gas containing fluorine treatment process and device - Google Patents
A kind of tin smelts smoking gas containing fluorine treatment process and device Download PDFInfo
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- CN110327758A CN110327758A CN201910614008.XA CN201910614008A CN110327758A CN 110327758 A CN110327758 A CN 110327758A CN 201910614008 A CN201910614008 A CN 201910614008A CN 110327758 A CN110327758 A CN 110327758A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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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
- B01D53/68—Halogens or halogen compounds
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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
- B01D53/75—Multi-step processes
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- 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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- 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
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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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
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2047—Hydrofluoric acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
The present invention relates to a kind of tin to smelt smoking gas containing fluorine treatment process and device, belongs to environmental technology field, it includes turbulence mixing column and cyclonic separation tower that processing tin of the present invention, which smelts smoking gas containing fluorine device,；It is connected to the top connection of cyclonic separation tower, cyclonic separation tower bottom with turbulence mixing tower bottom at the top of turbulence mixing column, to form powder circulation loop between turbulence mixing column and cyclonic separation tower；Sharp impacts, reunion, cladding occur in turbulence mixing column with the powder sprayed into tower for smoking gas containing fluorine, and realization effectively removes flue gas containing fluorine contaminant.Since partial size is smaller after turbulence mixing column mixed processing, in the cyclonic separation tower little particle flue dust at large caught, through bottom cycle and returns to turbulence mixing column and handle again.For the removal rate that the present invention smelts smoking gas containing fluorine fluorine to tin up to 95% or more, it is low to efficiently solve existing smoking gas containing fluorine processing equipment purification efficiency, easily blocking the problems such as, treated flue gas meet the requirement of environmental protection.
Description
Technical field
The invention belongs to environmental technology fields, specifically, are related to a kind of tin and smelt smoking gas containing fluorine treatment process and device.
Background technique
Tin electrolysis electrolyte used can be divided into acidic electrolysis bath and alkaline electrolyte two major classes, and acidic electrolysis bath is preferably handled
Impure lower thick tin, acidic electrolysis bath mainly have the systems such as sulfuric acid, hydrochloric acid, silicofluoric acid, due to being electrolysed work using silicofluoric acid
Skill is adaptable, and electrolysis production process is stablized, can direct output high-quality scolding tin, and there is advantage easy to operate, at low cost, obtain
To extensive use.In H2SiF6-Sn SiF6·PbSiF6When fluosilicic acid electrolyte is electrolysed, when cathode-anode plate cannot be used continuously
When, it needs to be cleaned anode scrap, dry, melting, casting.
In the fusion process of anode scrap, the flue gas containing fluorine, tin and certain aerosol composition can be generated, in this flue gas
Grain graininess is thin, stickiness is strong, corrosivity is strong.Flue gas stickiness great Yi is attached on cleaner, and the fluorine in flue gas is to dust collection device
Corrosion it is especially big, dust collection device service life is short.The smoking gas containing fluorine is administered using conventional dry method, wet process, it can not
Achieve the effect that high-efficient purification flue gas, is difficult to realize qualified discharge.
For this purpose, for the feature that grain graininess is thin, stickiness is strong, corrosivity is strong in melting flue gas, research and develop it is a set of it is with strong points,
The toxic and harmful gas in flue gas can be effectively removed, the technique and equipment for the flue gas meet the requirement of environmental protection that makes that treated are that have very much must
It wants.
Summary of the invention
In order to solve the problems, such as background technique, the present invention provides a kind of tin smelt smoking gas containing fluorine treatment process and
Device solves the problems, such as that tin smelting smoke dust is easily adhered to cleaner, and fluorine is de- by the co- controlling of equipment and technique
Except rate is up to 93% or more, solves the technology that the equipment cycle of operation is short, defluorinate rate is low present in current tin flue gas during smelting processing and ask
Topic has stronger practicability, operability and the value being widely popularized.
To achieve the above object, the present invention is achieved through the following technical solutions:
A kind of tin smelting smoking gas containing fluorine processing unit, it is characterised in that: it includes rapids that the processing tin, which smelts smoking gas containing fluorine device,
Dynamic mixing column and cyclonic separation tower；It is connected at the top of turbulence mixing column with the top of cyclonic separation tower, cyclonic separation tower bottom and rapids
Dynamic mixing tower bottom connection, to form circulation loop between turbulence mixing column and cyclonic separation tower；It is mixed through turbulence mixing column
The biggish flue dust of partial size is collected after conjunction processing, and the lesser flue dust of partial size returns to turbulence mixing column circular treatment, in cyclonic separation
The bottom of tower is equipped with heavy slotting section, by changing flue gas flow direction, enhances thick dirt and thin dirt separating effect in flue gas.
Preferably, turbulence mixing tower bottom is connect with flue, alkaline material duster is provided on flue,
Alkaline material is mixed with flue gas in flue, and is passed through turbulence mixing column, and flue gas and alkaline powder are in turbulence mixing column
It is vigorously mixed, reunites, smoking gas containing fluorine is coated.
Preferably, the bottom of the turbulence mixing column is equipped with flue gas distributor, middle part is equipped with lye injection apparatus.
Preferably, offering plate hole on the flue gas distributor, each plate hole is equipped with spray head, and spray head is mixed to turbulence
Tower tower wall direction is closed in 30~65 degree of inclinations.
Preferably, the separation column is equipped with metal filter bag, bottom is equipped with thick dirt collection bucket.
Preferably, being equipped with lock wind discharge valve between the knockout tower and thick dirt collection bucket.
A kind of tin smelts smoking gas containing fluorine treatment process, characterized by the following steps:
(1) smoking gas containing fluorine in flue with and Ca (OH)2And SnO2Preliminary mixing, realize the quenched reaction of flue gas；
(2) flue gas of conditioned reaction uniformly sprays into the fluorine and Ca realized in flue gas in turbulence mixing column through flue gas distributor
(OH)2And SnO2Turbulent closure scheme；
(3) smoking gas containing fluorine and dirt and Ca (OH) in flue gas2And SnO2Mixture continue to rise under airflow function, it is mixed through turbulence
Close the atomization Ca (OH) that the spray head being arranged in tower sprays2After solution wetted, in turbulence mixing column carry out sharp impacts, reunion,
Cladding effectively realizes the removal to flue gas containing fluorine contaminant；The SnO of addition2Flue dust, fine size, moisture content are low, can preferably wrap
Wrap up in the fluorine-containing material in flue gas；
(4) fluorine in flue gas and fine dirt and CaO and SnO2Mixture be rolled into after thick dirt and enter in cyclonic separation tower, in whirlpool
Thick dirt generates sedimentation under the action of rotational gas flow.Partial fume is drained after metal sock filtration through exhanst gas outlet；Flue gas neutralize compared with
Thick soot dust granule object is collected into thick dirt collection bucket after locking wind ash ejector, and thinner flue dust returns in turbulence mixing column with air-flow
Circulation.
Preferably, Ca (OH) described in step (1)2And SnO2The mass ratio of mixture is 1:1 ~ 3；Ca(OH)2Addition
Amount (in terms of CaO) is 2-5 times of fluorine molar content.
Preferably, step (1) Ca (OH)2Granularity is that the sieving rate of 200 mesh is not less than 80%；
Preferably, Ca (OH) described in step (3)2The mass concentration of solution is 5-15%.
Preferably, gas velocity control is in 4 ~ 10 m/s in turbulence mixing column tower.
Beneficial effects of the present invention:
1, the present invention is according to containing the characteristic of aerosol, passing through in flue gas and spray into CaO and SnO in flue2Alkaline material,
It carries out turbulence with the mixed flue gas of alkaline material to mix, smoking gas containing fluorine reacts: Ca (OH)2+2HF=CaF2+2H2O, to cigarette
Fluoride in gas plays neutralization, adds SnO2Because its fine size, moisture content are low, can preferably wrap up fluorine-containing in flue gas
Material, can effectively increase the partial size of flue dust, and alkaline material realizes neutralization to smoking gas containing fluorine, package；Further, flue dust and alkalinity
Material uniformly sprays into turbulence mixing column through flue gas distributor, and flue gas is made to recycle boiling in turbulence mixing column, and constantly with
Alkaline reaction, package make alkaline material play package action to the aerosol in flue gas, while alkaline material plays fluoro-gas
To neutralization, adherency of the aerosol to equipment is effectively prevented, service life of equipment is extended.
2, flue gas distributor of the present invention has not only effectively dispersed flue gas, for sufficiently converging for flue gas and alkaline material and lye
Provide guarantee；And the design of flue gas distributor upper nozzle, the flow direction of gas in turbulence mixing column is effectively controlled, is air-flow
Turbulence provides guarantee, and flue gas is enable to form vortex turbulence in turbulence mixing column, and further ensures fume treatment effect.
3, in turbulence mixing column gas flow rate control, be according to tin smelt smoking gas containing fluorine characteristic, guarantee in the gas
Turbulating effect is formed under flow velocity, residence time of the smoking gas containing fluorine in turbulence mixing column has been effectively ensured, has further ensured and contains
The neutralization of fluorine flue gas, package effect, provide guarantee for the dedusting that flue dust enters cyclonic separation tower.
Detailed description of the invention
Fig. 1 is the device of the invention structure chart；
Fig. 2 is distribution board pore structural schematic diagram of the invention；
Fig. 3 is distribution grid spray head setting status diagram of the invention；
Fig. 4 is lye injection apparatus structural schematic diagram of the invention；
In figure, 1- turbulence mixing column, 2- cyclonic separation tower, 2-1- cyclonic separation tower heavy slotting section, 3- flue gas distributor, 3-1- plate
Hole, 3-2- distribution grid spray head, 4- lye injection apparatus, 4-1- lye spray head, 5- metal filter bag, the thick dirt collection bucket of 6-, 7- lock wind
The thin dirt circulation pipe of discharge valve, 8- duster, 9-, 10- purifying smoke pipeline.
Remarks: line segment with the arrow in figure represents the direction of motion of flue gas.
Specific embodiment
It, below will be to preferred reality of the invention in order to keep the purpose of the present invention, technical scheme and beneficial effects clearer
It applies example to be described in detail, to facilitate the technical staff to understand.
As shown in Figs 1-4, it includes turbulence mixing column 1 and cyclonic separation tower 2 that the processing tin, which smelts smoking gas containing fluorine device,；
The bottom of turbulence mixing column 1 is equipped with flue gas distributor 3, middle part is equipped with lye injection apparatus 4；Gold is equipped at the top of cyclonic separation tower 2
Belong to filter bag 5, bottom is equipped with thick dirt collection bucket 6, is equipped with lock wind discharge valve 7 between cyclonic separation tower 2 and thick dirt collection bucket 6.Turbulence
Mixing column 1 passes through pipeline with the top and bottom of cyclonic separation tower 2 respectively and is connected to.
The flue gas during smelting come out from smelting device is sent through flue to turbulence mixing column 1, in flue, flue gas with
The Ca (OH) that the duster 8 being arranged on flue sprays2And SnO2The mixing of mixed-alkali material is quenched, and by being set to rapids
The injection of the flue gas distributor 3 of dynamic 1 bottom of mixing column sprays into turbulence mixing column 1.
Flue gas distributor 3 is equipped with plate hole 3-1, and each plate hole 3-1 is equipped with spray head 3-2, spray head 3-2 and turbulence mixing column
1 tower wall direction tilts upwards in 30-65 degree, and the inclined spray head 3-2 in the direction Xiang Tabi plays guidance flue gas flow direction, flue gas is made to exist
It is in eddy flow state in turbulence mixing column 1, not only extends flue gas residence time in turbulence mixing column 1, also further enhance
Turbulating effect of the flue gas in turbulence mixing column 1, ensure that flue gas in turbulence mixing column 1 by sufficiently in and package.
Flue gas by alkaline material and package, and is arranged on the lye at 1 middle part of turbulence mixing column in turbulence mixing column 1
The Ca (OH) that injection apparatus sprays2Alkaline solution infiltration neutralizes, and the lye of injection accelerates in further and while flue dust
The package of flue dust ensure that the increase effect of smoke granularity.In flue gas by constantly and in encapsulation process, not only fluorine-containing material
Be neutralized, soot dust granule becomes larger, the aerosol tiny, adhesiveness is big is also wrapped up, is neutralized, and then reduces flue dust to equipment
Adherency effectively extends equipment using cleaning cycle, and through actually using, the cleaning cycle of equipment is 3.2 months, and original is higher than current
Cleaner 1 month cleaning cycle of tin flue gas during smelting.
Flue dust after neutralized package enters cyclonic separation tower 2 through 1 top of turbulence mixing column, the flue dust partial size after being wrapped
Become larger, in filtering of the cyclonic separation tower 2 through metal filter bag 5, purified flue gas is discharged from purifying smoke pipeline 10, and flue dust is to whirlpool
Revolve the landing of 2 bottom eddy flow of knockout tower；In descent, thin dirt returns to turbulence mixing column 1 through thin dirt circulation pipe 9, realizes thin dirt
Circular treatment；Thick dirt enters thick dirt collection bucket 6 through lock wind discharge valve 7.
2 bottom of cyclonic separation tower is equipped with heavy slotting section 2-1, and flue dust is in 2 dropping process of cyclonic separation tower, in heavy slotting section 2-1 cigarette
To changing, flow velocity is also minimized air-flow therewith, the reduction of this flow velocity and the change of flow direction, more favorably with larger granularity
The vertical drop of flue dust is simultaneously collected by thick dirt collection bucket 6, is effectively prevented excessive partial size flue dust and is entered turbulence mixing column 1 simultaneously constantly
Circulation, and then avoid in turbulence mixing column 1 because of the influence there are the excessive flue dust of partial size to turbulating effect.
Using above-mentioned apparatus structure, to the treatment process of tin flue gas during smelting:
It will be described in detail below using the preferred embodiment of the concrete technology of above equipment processing tin flue gas during smelting.
Embodiment 1:
A kind of tin smelting smoking gas containing fluorine treatment process, characterized by the following steps:
The fume indication situation come out from smelting furnace: smoke content: 300 mg/Nm3, fluorine-containing: 100 mg/Nm3。
(1) Ca (OH) that smoking gas containing fluorine is 1:1.5 with mass ratio in flue2And SnO2Granular material tentatively mixes,
Realize the quenched reaction of flue gas；Ca(OH)2Dosage (in terms of CaO) be 2.5 times of mole of fluorine in flue gas, Ca (OH) used2
It is not less than 80% powder for the sieving rate of 200 mesh；
(2) flue gas of conditioned reaction uniformly sprays into through flue gas distributor 3 and realizes flue gas and Ca (OH) in turbulence mixing column 12With
SnO2Turbulent closure scheme；
(3) flue gas and Ca (OH)2And SnO2Mixture continue under the action of turbulent air turbulence rising, through turbulence mixing column
The atomization Ca (OH) that the mass concentration that the lye injection apparatus 4 of interior 1 setting sprays is 7%2After solution wetted, in turbulence mixing column
Interior 1 carries out sharp impacts, neutralization, reunion, cladding, realizes to the neutralization in flue gas containing fluorine contaminant to the package of thin dirt；Addition
SnO2Flue dust, fine size, moisture content are low, can preferably wrap up the fluorine-containing material in flue gas；Gas velocity control in turbulence mixing column tower 1
For system at 4 ~ 10m/s, the gas flow rate, the turbulating effect of tin flue gas during smelting is best, the grain from the flue gas that turbulence mixing column comes out
Powdery accounting of the degree greater than 0.1mm can be efficiently separated 80-83%, and recycle through thin dirt up to 60% or more in cyclonic separation tower 2
The fine powder partial size in turbulence mixing column 1 that pipe 9 returns not only will not influence material turbulating effect in turbulence mixing column 1, and can have
It generates and depends between fine powder in effect and turbulence mixing column 1, accelerate the package of fine powder in turbulence mixing column 1.In this way, being mixed in turbulence
Stable a Matter Transfer and size distribution are formed between tower 1 and cyclonic separation tower 2.
(4) fluorine in flue gas and fine dirt and Ca (OH)2And SnO2Mixture be rolled into after thick dirt and enter cyclonic separation tower
In 2, after the filtering of metal filter bag 5, the purified flue 10 of partial fume is drained, remaining flue dust is under the action of eddy airstream
Sink in 2 inward eddy of cyclonic separation tower；Thicker flue dust enters thick dirt collection bucket and is collected in flue gas, and thinner flue dust is through thin dirt circulation pipe
9 return to circular treatment in turbulence mixing column 1.
Through detecting, through the filtered purification flue dust of metal screen, soot dust granule object≤100mg/Nm3, F≤5mg/Nm3, fluorine
Removal rate is 95%, is created condition for the deep purifying processing of next step flue gas.
Embodiment 2:
A kind of tin smelting smoking gas containing fluorine treatment process, characterized by the following steps:
The fume indication situation come out from smelting furnace: smoke content: 350 mg/Nm3, fluorine-containing: 200 mg/Nm3).
(1) Ca (OH) that smoking gas containing fluorine is 1:2.5 with mass ratio in flue2And SnO2Granular material tentatively mixes,
Realize the quenched reaction of flue gas；Ca(OH)2Dosage (in terms of CaO) non-flue gas in 4 times of mole of fluorine, Ca (OH) used2For
The sieving rate of 200 mesh is not less than 80% powder；
(2) flue gas of conditioned reaction uniformly sprays into through flue gas distributor and realizes flue gas and Ca (OH) in turbulence mixing column2With
SnO2Turbulent closure scheme；
(3) flue gas and Ca (OH)2And SnO2Mixture continue under airflow function turbulence rising, be arranged in turbulence mixing column
Lye injection apparatus spray mass concentration be 12% atomization Ca (OH)2After solution wetted, carried out in turbulence mixing column acute
Strong collision neutralizes, reunites, cladding, realizes neutralization to flue gas containing fluorine contaminant, to the package of thin dirt；The SnO of addition2Flue dust,
Fine size, moisture content are low, can preferably wrap up the fluorine-containing material in flue gas；Gas velocity control is in 4 ~ 10m/s in turbulence mixing column tower.
(4) fluorine in flue gas and fine dirt and Ca (OH)2And SnO2Mixture be rolled into after thick dirt and enter cyclonic separation tower
Interior, after metal sock filtration, the purified flue of flue gas is drained, and flue dust is under the action of eddy airstream in vortex knockout tower
Inward eddy sinks；Partial fume is drained through purified flue；The thicker flue dust of flue gas neutralization enters thick dirt collection bucket and is collected, compared with
Thin flue dust returns to circular treatment in turbulence mixing column.
Through detecting, through the filtered purification flue dust of metal screen, soot dust granule object≤90mg/Nm3, F≤5mg/Nm3, fluorine goes
Except rate be 96.2% be next step flue gas deep purifying processing create condition.
Finally, it is stated that preferred embodiment above is only used to illustrate the technical scheme of the present invention rather than limits, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (10)
1. a kind of tin smelts smoking gas containing fluorine processing unit, it is characterised in that: the processing tin smelts smoking gas containing fluorine device and includes
Turbulence mixing column and cyclonic separation tower；Be connected at the top of turbulence mixing column with the top of cyclonic separation tower, cyclonic separation tower bottom and
Turbulence mixing tower bottom connection, to form circulation loop between turbulence mixing column and cyclonic separation tower；Through turbulence mixing column
The biggish flue dust of partial size is collected after entering cyclonic separation tower after mixed processing, and the lesser flue dust of partial size returns to turbulence mixing column and follows
Ring processing.
2. a kind of tin according to claim 1 smelts smoking gas containing fluorine processing unit, it is characterised in that: turbulence mixing tower bottom
It connecting with flue, alkaline material duster is provided on flue, alkaline material is mixed with flue gas in flue,
And it is passed through turbulence mixing column, flue gas is vigorously mixed in turbulence mixing column with alkaline powder, reunites, wraps to smoking gas containing fluorine
It covers.
3. a kind of tin according to claim 1 smelts smoking gas containing fluorine processing unit, it is characterised in that: the turbulence mixing
The bottom of tower is equipped with flue gas distributor, and middle part is equipped with lye injection apparatus.
4. a kind of tin according to claim 3 smelts smoking gas containing fluorine processing unit, it is characterised in that: the smoke distribution
Plate hole is offered on plate, each plate hole is equipped with spray head, and spray head is to turbulence mixing column tower wall direction in 30~65 degree of inclinations.
5. a kind of tin according to claim 1 smelts smoking gas containing fluorine processing unit, it is characterised in that: the cyclonic separation tower
Top is equipped with metal filter bag, and bottom is equipped with thick dirt collection bucket.
6. a kind of tin according to claim 1 or 6 smelts smoking gas containing fluorine processing unit, it is characterised in that: the vortex
Lock wind discharge valve is equipped between knockout tower and thick dirt collection bucket.
7. a kind of tin smelts smoking gas containing fluorine treatment process, it is characterised in that: the tin smelts smoking gas containing fluorine treatment process and includes
Following steps:
(1) smoking gas containing fluorine in flue with and Ca (OH)2And SnO2Preliminary mixing, realizes the quenched reaction of flue gas；
(2) flue gas of conditioned reaction uniformly sprays into the fluorine and Ca realized in flue gas in turbulence mixing column through flue gas distributor
(OH)2And SnO2Turbulent closure scheme；
(3) smoking gas containing fluorine, flue dust and Ca (OH) in flue gas2And SnO2Mixture continue to rise under airflow function, it is mixed through turbulence
Close the atomization Ca (OH) that the lye injection apparatus being arranged in tower sprays2After solution wetted, acutely touched in turbulence mixing column
It hits, reunite, coat, realize the removal to flue gas containing fluorine contaminant；The SnO of addition2Flue dust, fine size, moisture content are low, can be more preferable
Wrap up the fluorine-containing material in flue gas in ground；
(4) fluorine in flue gas and fine dirt are through Ca (OH)2And SnO2Mixture be rolled into after thick dirt and enter in cyclonic separation tower,
Thick dirt settles under the action of eddy airstream,
Partial fume is drained after metal sock filtration through exhanst gas outlet；Flue gas neutralizes thicker soot dust granule object through locking wind discharging
Thick dirt collection bucket is collected into after valve, thinner flue dust is returned in turbulence mixing column with air-flow and recycled.
8. a kind of tin according to claim 7 smelts smoking gas containing fluorine treatment process, it is characterised in that: described in step (1)
Ca(OH)2And SnO2The mass ratio of mixture is 1:1 ~ 3；Ca(OH)2Additive amount (in terms of CaO) be fluorine molar content 2-5
Times, Ca (OH)2Granularity are as follows: -200 >=80%.
9. a kind of tin according to claim 7 smelts smoking gas containing fluorine treatment process, it is characterised in that: described in step (3)
Ca(OH)2The mass concentration of solution is 5-15%.
10. a kind of tin according to claim 7 smelts smoking gas containing fluorine processing unit, it is characterised in that: turbulence mixing column tower
Interior gas velocity control are as follows: 4 ~ 10m/s.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111085082A (en) * | 2019-12-31 | 2020-05-01 | 江苏大东新材料科技有限公司 | Waste gas treatment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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