CN108939828A - A kind of flue gas processing method of metallic silicon smelting-furnace - Google Patents

A kind of flue gas processing method of metallic silicon smelting-furnace Download PDF

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Publication number
CN108939828A
CN108939828A CN201810773012.6A CN201810773012A CN108939828A CN 108939828 A CN108939828 A CN 108939828A CN 201810773012 A CN201810773012 A CN 201810773012A CN 108939828 A CN108939828 A CN 108939828A
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China
Prior art keywords
flue gas
gas
dust
sulfur dioxide
processing method
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Pending
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CN201810773012.6A
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Chinese (zh)
Inventor
朱万政
王三忠
高波
孙忠皓
鄢长喜
田博
曹村兵
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Tianjin Wei Run New Mstar Technology Ltd
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Tianjin Wei Run New Mstar Technology Ltd
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Priority to CN201810773012.6A priority Critical patent/CN108939828A/en
Publication of CN108939828A publication Critical patent/CN108939828A/en
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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
    • B01D53/14—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
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • B01D46/04—Cleaning filters
    • 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
    • B01D53/1406—Multiple stage absorption
    • 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
    • B01D53/1456—Removing acid components
    • B01D53/1481—Removing sulfur dioxide or sulfur trioxide
    • 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
    • B01D53/1493—Selection of liquid materials for use as absorbents
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/10—Inorganic absorbents
    • 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
    • B01D2258/0283—Flue gases

Abstract

The present invention provides a kind of flue gas processing method of metallic silicon smelting-furnace, the steps include: to cool down in high-temperature flue gas inspiration pipeline；Flue gas after cooling is introduced into fiber bag precipitator and is filtered collection silicon powder；Dust is sent into dust grader with back draught by high pressure blower and realizes classification by flue gas；Silicon powder enters powder cabin with air-flow in dust after classification, enters collection to silicon powder, purifies to the gas containing sulfur dioxide；Detection process is carried out to purified gas.Flue gas treating process of the present invention is reasonable, flue gas passes through pre-collector when being cooled down, primary raw material in high-temperature flue gas is collected, cost is saved, flue gas enters dust grader by back suction processing in the cloth bag of fiber bag precipitator and realizes classification, enhances dust removing effects, passes through the absorption tower of plural serial stage, gas containing sulfur dioxide is purified, the purification requirement effectively recycled to silicon powder and to sulfur dioxide in flue gas pernicious gas is met.

Description

A kind of flue gas processing method of metallic silicon smelting-furnace
Technical field
The present invention relates to metallic silicon smelting purification technique field more particularly to a kind of fume treatment sides of metallic silicon smelting-furnace Method.
Background technique
Metallic silicon is also known as industrial silicon, and metallic silicon is the product smelted in mineral hot furnace by silica and carbonaceous reducing agent, gold Belonging to silicon is carbon isotopes, and in mineral hot furnace when metal smelting silicon, can generate main component is silica dust (silicon powder) With the high-temperature flue gas of the pernicious gases such as part sulfur dioxide, wherein the high-temperature flue gas containing sulfur dioxide will cause it is extremely serious big Gas pollution seriously endangers the health of people, and silica dust (silicon powder) is that have excellent physicochemical property and return Receive the substance of value.Therefore, it is necessary to the recycling of purification with silica is carried out to the flue gas in metallic silicon smelting-furnace.
The fume treatment of metallic silicon smelting-furnace generallys use dry method (electric precipitation, bag-type dust) or wet processing carries out flue gas Processing, wherein dry process uses cooler to cooling high-temperature fume, then carries out silicon-carbon with two-stage whirlwind ash separater and separate Removing heavy metals, sack cleaner recycle silicon powder and in density storehouse into the recovery system of density, the mature technology, effect of gathering dust It is beneficial high, but the device is complicated, and production is difficult, and cost is high, and energy consumption is high, and operating cost is high, and cannot remove sulfur dioxide in flue gas etc. has Evil gas, is not avoided that serious harm of the dust to human body in maintenance of equipment；Wet processing is to contact water directly with flue gas, Flue gas is adhered to using drop and liquid film, its advantage is that equipment is simple, manufacture is easy, low cost, operating cost is low, benefit of gathering dust Height, working condition are good, small to the harm of human body, and deficiency is that water consumption is big, and secondary pollution is serious, can not effectively be returned to silicon powder It receives.
At this stage during the fume treatment of metallic silicon smelting-furnace there are flue gas treating process dust removing effects are poor, purification effect The undesirable problem of fruit is unable to satisfy and is effectively recycled to silicon powder and to the net of the pernicious gases such as sulfur dioxide in flue gas Change and requires.
Summary of the invention
Present invention seek to address that the deficiencies in the prior art, and a kind of flue gas processing method of metallic silicon smelting-furnace is provided.
The present invention to achieve the above object, using following technical scheme:
A kind of flue gas processing method of metallic silicon smelting-furnace, which is characterized in that the steps include:
A, the high-temperature flue gas of metal smelting silicon generation in mineral hot furnace is drawn into the pipeline of snakelike setting through main induced draft fan It is inside cooled down, centre is collected the primary raw material in high-temperature flue gas, is collected into pre-collector by pre-collector Raw material adds in mineral hot furnace, to re-use；
B, the flue gas for eliminating primary raw material after cooling is introduced into fiber bag precipitator through triple valve air inlet and was carried out Silicon powder is collected in filter；
C, flue gas is trapped in the cloth bag of fiber bag precipitator, and with the increase of dust thickness, filtration resistance can also increase Add, when filtering air quantity reduction, closes triple valve air inlet, open back suction air port, high pressure blower will be in fiber bag precipitator All gas pumps and is formed back draught, and the cloth bag in fiber bag precipitator is flattened, and dust is detached from from cloth bag inner wall, by height Dust is sent into dust grader with back draught and realizes classification by pressure fan；
D, silicon powder with air-flow enters powder cabin in the dust after classification, then in powder cabin density storehouse top gas solid separation Device is separated, and enters collection to silicon powder, and the gas containing sulfur dioxide enters through honeycomb gas distributor more from bottom to top The concatenated purifying column of grade；
E, sodium sulfite solution is sprayed onto the absorption tower of plural serial stage from top to bottom, carries out to the gas containing sulfur dioxide Purification；
F, detection process is carried out to purified gas, detects qualified gas and be directly discharged into atmosphere, detects underproof The purifying column for the plural serial stage that gas is again introduced into bottommost through circulating line is purified again, until qualified.
Preferably, the pipeline outer wall of snakelike setting is cased with the double-deck water flowing water jacket in the step a, circulation is full of in water jacket Cooling water, the flow direction of recirculated cooling water and the flow direction of high-temperature flue gas are on the contrary, water temperature is 20 DEG C~70 DEG C.
Preferably, flow velocity of the step a high temperature flue gas in the pipeline of snakelike setting is 20m/s~25m/s.
Preferably, in the step b fiber bag precipitator running parameter are as follows: filtration velocity 2m/min~4m/min, Filtering air quantity is 6500m3/ h~15000m3/h。
Preferably, the time of contact of the gas containing sulfur dioxide and sodium sulfite solution is 15min in the step e ~30min.
The beneficial effects of the present invention are: the present invention provides a kind of flue gas processing method of metallic silicon smelting-furnace, fume treatment Rational technology, flue gas, by pre-collector, are collected the primary raw material in high-temperature flue gas, so as to again when being cooled down It utilizing, has saved cost, flue gas enters dust grader by back suction processing in the cloth bag of fiber bag precipitator and realizes classification, Dust removing effects are enhanced, the gas containing sulfur dioxide enters the purification of plural serial stage through honeycomb gas distributor from bottom to top Tower；By the absorption tower of plural serial stage, the gas containing sulfur dioxide is purified, solves that clean-up effect is undesirable to ask Topic, meets the purification requirement effectively recycled to silicon powder and to sulfur dioxide in flue gas pernicious gas.
Specific embodiment
Below with reference to embodiment, the invention will be further described:
A kind of flue gas processing method of metallic silicon smelting-furnace, which is characterized in that the steps include:
A, the high-temperature flue gas of metal smelting silicon generation in mineral hot furnace is drawn into the pipeline of snakelike setting through main induced draft fan It is inside cooled down, centre is collected the primary raw material in high-temperature flue gas, is collected into pre-collector by pre-collector Raw material adds in mineral hot furnace, to re-use；
B, the flue gas for eliminating primary raw material after cooling is introduced into fiber bag precipitator through triple valve air inlet and was carried out Silicon powder is collected in filter；
C, flue gas is trapped in the cloth bag of fiber bag precipitator, and with the increase of dust thickness, filtration resistance can also increase Add, when filtering air quantity reduction, closes triple valve air inlet, open back suction air port, high pressure blower will be in fiber bag precipitator All gas pumps and is formed back draught, and the cloth bag in fiber bag precipitator is flattened, and dust is detached from from cloth bag inner wall, by height Dust is sent into dust grader with back draught and realizes classification by pressure fan；
D, silicon powder with air-flow enters powder cabin in the dust after classification, then in powder cabin density storehouse top gas solid separation Device is separated, and enters collection to silicon powder, and the gas containing sulfur dioxide enters through honeycomb gas distributor more from bottom to top The concatenated purifying column of grade；
E, sodium sulfite solution is sprayed onto the absorption tower of plural serial stage from top to bottom, carries out to the gas containing sulfur dioxide Purification；
F, detection process is carried out to purified gas, detects qualified gas and be directly discharged into atmosphere, detects underproof The purifying column for the plural serial stage that gas is again introduced into bottommost through circulating line is purified again, until qualified.
Preferably, the pipeline outer wall of snakelike setting is cased with the double-deck water flowing water jacket in the step a, circulation is full of in water jacket Cooling water, the flow direction of recirculated cooling water and the flow direction of high-temperature flue gas are on the contrary, water temperature is 20 DEG C~70 DEG C.
Preferably, flow velocity of the step a high temperature flue gas in the pipeline of snakelike setting is 20m/s~25m/s.
Preferably, in the step b fiber bag precipitator running parameter are as follows: filtration velocity 2m/min~4m/min, Filtering air quantity is 6500m3/ h~15000m3/h。
Preferably, the time of contact of the gas containing sulfur dioxide and sodium sulfite solution is 15min in the step e ~30min.
Embodiment 1
A kind of flue gas processing method of metallic silicon smelting-furnace, the steps include:
A, the high-temperature flue gas of metal smelting silicon generation in mineral hot furnace is drawn into the pipeline of snakelike setting through main induced draft fan It is inside cooled down, flow velocity of the high-temperature flue gas in the pipeline of snakelike setting is 20m/s, and the pipeline outer wall of snakelike setting is cased with bilayer Water flowing water jacket, water jacket is interior to be full of recirculated cooling water, and the flow direction of recirculated cooling water and the flow direction of high-temperature flue gas are on the contrary, water temperature is 20 DEG C, centre is collected the primary raw material in high-temperature flue gas, the raw material being collected into pre-collector is again by pre-collector It is added in mineral hot furnace, to re-use；
B, the flue gas for eliminating primary raw material after cooling is introduced into fiber bag precipitator through triple valve air inlet and was carried out Silicon powder, the running parameter of fiber bag precipitator are collected in filter are as follows: filtration velocity 2m/min, filtering air quantity are 6500m3/h；
C, flue gas is trapped in the cloth bag of fiber bag precipitator, and with the increase of dust thickness, filtration resistance can also increase Add, when filtering air quantity reduction, closes triple valve air inlet, open back suction air port, high pressure blower will be in fiber bag precipitator All gas pumps and is formed back draught, and the cloth bag in fiber bag precipitator is flattened, and dust is detached from from cloth bag inner wall, by height Dust is sent into dust grader with back draught and realizes classification by pressure fan；
D, silicon powder with air-flow enters powder cabin in the dust after classification, then in powder cabin density storehouse top gas solid separation Device is separated, and enters collection to silicon powder, and the gas containing sulfur dioxide enters through honeycomb gas distributor more from bottom to top The concatenated purifying column of grade；
E, sodium sulfite solution is sprayed onto the absorption tower of plural serial stage from top to bottom, gas and sulfurous containing sulfur dioxide The time of contact of acid sodium solution is 15min, is purified to the gas containing sulfur dioxide；
F, detection process is carried out to purified gas, detects qualified gas and be directly discharged into atmosphere, detects underproof The purifying column for the plural serial stage that gas is again introduced into bottommost through circulating line is purified again, until qualified.
Embodiment 2
A kind of flue gas processing method of metallic silicon smelting-furnace, the steps include:
A, the high-temperature flue gas of metal smelting silicon generation in mineral hot furnace is drawn into the pipeline of snakelike setting through main induced draft fan It is inside cooled down, flow velocity of the high-temperature flue gas in the pipeline of snakelike setting is 25m/s, and the pipeline outer wall of snakelike setting is cased with bilayer Water flowing water jacket, water jacket is interior to be full of recirculated cooling water, and the flow direction of recirculated cooling water and the flow direction of high-temperature flue gas are on the contrary, water temperature is 70 DEG C, centre is collected the primary raw material in high-temperature flue gas, the raw material being collected into pre-collector is again by pre-collector It is added in mineral hot furnace, to re-use；
B, the flue gas for eliminating primary raw material after cooling is introduced into fiber bag precipitator through triple valve air inlet and was carried out Silicon powder, the running parameter of fiber bag precipitator are collected in filter are as follows: filtration velocity 4m/min, filtering air quantity are 15000m3/h；
C, flue gas is trapped in the cloth bag of fiber bag precipitator, and with the increase of dust thickness, filtration resistance can also increase Add, when filtering air quantity reduction, closes triple valve air inlet, open back suction air port, high pressure blower will be in fiber bag precipitator All gas pumps and is formed back draught, and the cloth bag in fiber bag precipitator is flattened, and dust is detached from from cloth bag inner wall, by height Dust is sent into dust grader with back draught and realizes classification by pressure fan；
D, silicon powder with air-flow enters powder cabin in the dust after classification, then in powder cabin density storehouse top gas solid separation Device is separated, and enters collection to silicon powder, and the gas containing sulfur dioxide enters through honeycomb gas distributor more from bottom to top The concatenated purifying column of grade；
E, sodium sulfite solution is sprayed onto the absorption tower of plural serial stage from top to bottom, gas and sulfurous containing sulfur dioxide The time of contact of acid sodium solution is 30min, is purified to the gas containing sulfur dioxide；
F, detection process is carried out to purified gas, detects qualified gas and be directly discharged into atmosphere, detects underproof The purifying column for the plural serial stage that gas is again introduced into bottommost through circulating line is purified again, until qualified.
The present invention is exemplarily described above, it is clear that present invention specific implementation is not subject to the restrictions described above, As long as using the various improvement that the inventive concept and technical scheme of the present invention carry out, or not improved directly apply to other fields It closes, it is within the scope of the present invention.

Claims (5)

1. a kind of flue gas processing method of metallic silicon smelting-furnace, which is characterized in that the steps include:
A, by mineral hot furnace metal smelting silicon generate high-temperature flue gas through main induced draft fan be drawn into the pipeline of snakelike setting into Row cooling, centre are collected the primary raw material in high-temperature flue gas, the raw material being collected into pre-collector by pre-collector It adds in mineral hot furnace, to re-use；
B, the flue gas for eliminating primary raw material after cooling is introduced into fiber bag precipitator through triple valve air inlet and is filtered receipts Collect silicon powder；
C, flue gas is trapped in the cloth bag of fiber bag precipitator, and with the increase of dust thickness, filtration resistance also be will increase, when When filtering air quantity and reducing, triple valve air inlet is closed, back suction air port is opened, high pressure blower is by whole gas in fiber bag precipitator Body pumps and is formed back draught, and the cloth bag in fiber bag precipitator is flattened, and dust is detached from from cloth bag inner wall, by high pressure blower Dust is sent into dust grader with back draught and realizes classification；
D, silicon powder with air-flow enters powder cabin in the dust after classification, then in powder cabin density storehouse top gas-solid separator into Row separation, enters collection to silicon powder, the gas containing sulfur dioxide enters multistage string through honeycomb gas distributor from bottom to top The purifying column of connection；
E, sodium sulfite solution is sprayed onto the absorption tower of plural serial stage from top to bottom, carries out to the gas containing sulfur dioxide net Change；
F, detection process is carried out to purified gas, detects qualified gas and be directly discharged into atmosphere, detects underproof gas The purifying column for being again introduced into the plural serial stage of bottommost through circulating line is purified again, until qualified.
2. a kind of flue gas processing method of metallic silicon smelting-furnace according to claim 1, which is characterized in that the step a In the pipeline outer wall of snakelike setting be cased with the double-deck water flowing water jacket, be full of recirculated cooling water in water jacket, the flow direction of recirculated cooling water with The flow direction of high-temperature flue gas is on the contrary, water temperature is 20 DEG C~70 DEG C.
3. a kind of flue gas processing method of metallic silicon smelting-furnace according to claim 1, which is characterized in that the step a Flow velocity of the high temperature flue gas in the pipeline of snakelike setting is 20m/s~25m/s.
4. a kind of flue gas processing method of metallic silicon smelting-furnace according to claim 1, which is characterized in that the step b The running parameter of middle fiber bag precipitator are as follows: filtration velocity 2m/min~4m/min, filtering air quantity are 6500m3/ h~15000m3/ h。
5. a kind of flue gas processing method of metallic silicon smelting-furnace according to claim 1, which is characterized in that the step e In the time of contact of the gas containing sulfur dioxide and sodium sulfite solution be 15min~30min.
CN201810773012.6A 2018-07-14 2018-07-14 A kind of flue gas processing method of metallic silicon smelting-furnace Pending CN108939828A (en)

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CN201810773012.6A CN108939828A (en) 2018-07-14 2018-07-14 A kind of flue gas processing method of metallic silicon smelting-furnace

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112546783A (en) * 2020-11-10 2021-03-26 将乐三晶新材料有限公司 Ore smelting furnace dust collector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112546783A (en) * 2020-11-10 2021-03-26 将乐三晶新材料有限公司 Ore smelting furnace dust collector

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