CN102764579A - Dedusting and desulfurizing technique of industrial silicon metal furnace smoke - Google Patents
Dedusting and desulfurizing technique of industrial silicon metal furnace smoke Download PDFInfo
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- CN102764579A CN102764579A CN2012102672038A CN201210267203A CN102764579A CN 102764579 A CN102764579 A CN 102764579A CN 2012102672038 A CN2012102672038 A CN 2012102672038A CN 201210267203 A CN201210267203 A CN 201210267203A CN 102764579 A CN102764579 A CN 102764579A
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- flue gas
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Abstract
The invention discloses a dedusting and desulfurizing technique of industrial silicon metal furnace smoke, which is characterized by adopting a wet process based on original dry-process bag-type dedusting and dust recycling densification of the industrial silicon metal furnace smoke, using sodium carbonate (NaCO3) and calcium carbonate (CaCO3) as desulfurizing agents, removing sulfur dioxide (SO2) in the smoke by a wet-type dedusting, desulfurizing and dewatering integrated tower and removing fine dust from the smoke for the second time to further reduce the discharge concentration of the smoke to realize dust and SO2 discharge with standards. Desulfurized products are used for producing sodium silicate (water glass) or calcium silicate to realize no waste discharge and bring economic benefit to enterprises. By adopting the technique disclosed by the invention, the discharge concentration of the smoke is less than 30mg/Nm3, the discharge concentration of the SO2 is less than 100mg/Nm3, no wastewater or solid waste is discharged, and the secondary pollution is not produced.
Description
Technical field:
A kind of industrial silicon electric furnace flue gas dust-removing and desulfurization process is mainly used in the dust-removal and desulfurizing of industrial silicon electric furnace flue gas, and realizes the resource of desulfurization product, belongs to environmental protection, flue-gas dust-removing and desulfurization technical field of resource utilization.
Background technology:
The primary raw material of manufacture silicon is silica, charcoal, petroleum coke, bituminous coal.Discharge a large amount of dust-ladens and SO during the electric furnace smelting industrial silicon
2Flue gas.Past, environmental administration was to SO because furnace volume is little, scope of the enterprise is little and dispersion
2All examine.The industrial silicon electric furnace is not established the flue gas desulfurization facility yet.Along with the industrial silicon furnace volume increases, scope of the enterprise is big and concentrate, cause SO
2The serious environmental carrying capacity that surpasses the area of discharging.The desulfurization of industrial silicon electric furnace flue gas is brought into schedule.
Flue gas desulfurization technique is very ripe at home.The sulfur removal technology that adopts has dry method, semidry method and wet method.Dry desulfurization efficient is low, and the huge application of equipment is less; Semidry process is complicated; Wet desulphurization efficient is high, is present topmost sulfur removal technology.
The capital equipment that wet desulphurization is adopted both at home and abroad is spray column, packed tower, Venturi tube tower, rotating stream tray scrubber, but all also there is easy obstruction in these equipment, water consumption is big, secondary pollution is serious.
Our company's dewatering integrated tower of independently developed high-efficient wet-type dust-removal and desulfurizing has that the dust-removal and desulfurizing dewatering efficiency is high, water consumption is less, non-wastewater discharge, non-secondary pollution, no nozzle, do not have stop up, freedom from repairs.Adopt modular construction, can be used for handling the SO in the big exhaust gas volumn of large scale industry silicon electric furnace
2
Summary of the invention:
Employing the objective of the invention is the multinomial patented technology of our company, and a kind of industrial silicon electric furnace flue gas dust-removing and desulfurization process is formed in set, and its patented technology comprises:
With industrial silicon smelting electric furnace gas cleaning and silicon powder recovery system (patent No. 201220075520.5)
A kind of dual stage cyclone machine power cooling integration equipment (patent No. 201120368680.4)
A kind of dust recovery bin (patent No. 20102019680.7)
The dewatering integrated tower of a kind of high-efficient wet-type dust-removal and desulfurizing (patent No. 201120406588.2)
Adopt calcium carbonate (CaCO
3), sodium carbonate (NaCO
3) make desulfurizing agent.
The technological equipment and the technological process of industrial silicon electric furnace flue gas dust-removing and desulfurization process by cooler, dual stage cyclone deduster, dry-method bag-type deduster, air-introduced machine, roots blower, density storehouse, gas-solid separator device, the dewatering integrated tower of dust-removal and desulfurizing, potass pool, mud pit, water pump, agitated reactor technological equipment, are reclaimed silicon powder with the dry-method bag-type deduster earlier; Then remove the integrated tower of desulfurization dewatering to the desulfurization of flue gas final dusting with wet type; The positive compression technology of dust-removal and desulfurizing is: electric furnace flue gas passes through cooler, dual stage cyclone deduster, air-introduced machine, and the dry-method bag-type deduster reclaims silicon powder from this deduster; Flue gas is through the supercharging storehouse; Be connected with roots blower and gas-solid separator on the supercharging storehouse, be connected with the Pneumatic ash conveying blower fan on the gas-solid separator, behind gas-solid separator; The pure qi (oxygen) discharging; Flue gas after the dedusting of dry-method bag-type dust-removing desulfurizing device passes through the dewatering integrated tower of dust-removal and desulfurizing again, and agitated reactor links to each other with the dewatering integrated tower of mud pit and dust-removal and desulfurizing; Alkali lye in the potass pool pumps in the dewatering integrated tower of wet dedusting desulfurization through water pump, and pure qi (oxygen) is from smoke stack emission;
The negative pressure technology of dust-removal and desulfurizing is: electric furnace flue gas is through cooler, dual stage cyclone deduster; Directly insert the dry-method bag-type deduster and reclaim silicon powder earlier; Terminal at connection air-introduced machine and gas-solid separator; Roots blower links to each other with gas-solid separator with the density storehouse and has saved the Pneumatic ash conveying blower fan, and the flue gas that air-introduced machine is drawn gets into the dewatering integrated tower of dust-removal and desulfurizing and carries out the secondary wet process dust-removal and desulfurizing, and the technology of wet dedusting desulfurization dehydration is identical with positive compression technology.
Potass pool is interior with calcium carbonate (CaCO
3) make desulfurizing agent, desulfurization product is used to produce calcium silicates, and the alkali lye in the potass pool is with sodium carbonate (NaCO
3) make desulfurizing agent, desulfurization product is as producing sodium metasilicate.
Adopt the beneficial effect of this technology:
Can be applied to the transformation of original environmental protection equipment easily, reduce equipment investment.
Adopt this technology dry-method bag-type deduster to reclaim dirt, can reclaim silicon powder with very high economic worth.
Adopt the dewatering integrated tower of high-efficient wet-type dust-removal and desulfurizing, can realize final dusting, particularly can improve the clearance of PM2.5 flue gas.
Adopt this technological process dehydration desulfuration efficiency can reach more than 95% SO
2Discharging can reach the country one type of area discharge standard, be lower than 100mg/Nm
3, desulfurization product can make full use of, and water consumption is few, no waste water, waste discharge, non-secondary pollution.
The dewatering integrated tower of high-efficient wet-type dust-removal and desulfurizing adopts the fiberglass manufacturing, and corrosion-resistant, service life is more than 15 years.
Description of drawings:
Fig. 1 is an industrial silicon electric furnace flue gas dust-removal and desulfurizing malleation process chart;
Fig. 2 is an industrial silicon electric furnace flue gas dust-removal and desulfurizing malleation process chart.
The specific embodiment:
Industrial silicon electric furnace flue gas dust-removing and desulfurization process of the present invention; Concrete embodiment; Can be used for the transformation of existing dust pelletizing system at present; Also be used for the dedusting of newly-built industrial silicon electric furnace flue gas and take off engineering, the dewatering integrated tower of wet dedusting desulfurization was used the fiberglass manufacturing when smoke treatment amount was big, industrial silicon electric furnace flue gas dust-removing and desulfurization process flow process.
The technological equipment and the technological process of industrial silicon electric furnace flue gas dust-removing and desulfurization process by cooler, dual stage cyclone deduster, dry-method bag-type deduster, air-introduced machine, roots blower, density storehouse, gas-solid separator, the dewatering integrated tower of dust-removal and desulfurizing, potass pool, mud pit, water pump, agitated reactor technological equipment, are reclaimed silicon powder with the dry-method bag-type deduster earlier; Then remove the integrated tower of desulfurization dewatering to the desulfurization of flue gas final dusting with wet type; The positive compression technology of dust-removal and desulfurizing is: electric furnace flue gas passes through cooler, dual stage cyclone deduster, air-introduced machine, and the dry-method bag-type deduster reclaims silicon powder from this deduster; Flue gas is through the supercharging storehouse; Be connected with roots blower and gas-solid separator on the supercharging storehouse, be connected with the Pneumatic ash conveying blower fan on the gas-solid separator, behind gas-solid separator; The pure qi (oxygen) discharging; Flue gas after the dedusting of dry-method bag-type dust-removing desulfurizing device passes through the dewatering integrated tower of dust-removal and desulfurizing again, and agitated reactor links to each other with the dewatering integrated tower of mud pit and dust-removal and desulfurizing; Alkali lye in the potass pool pumps in the dewatering integrated tower of wet dedusting desulfurization through water pump, and pure qi (oxygen) is from smoke stack emission;
The negative pressure technology of dust-removal and desulfurizing is: electric furnace flue gas is through cooler, dual stage cyclone deduster; Directly insert the dry-method bag-type deduster and reclaim silicon powder earlier; Terminal at connection air-introduced machine and gas-solid separator; Roots blower links to each other with gas-solid separator with the density storehouse and has saved the Pneumatic ash conveying blower fan, and the flue gas that air-introduced machine is drawn gets into the dewatering integrated tower of dust-removal and desulfurizing and carries out the secondary wet process dust-removal and desulfurizing, and the technology of wet dedusting desulfurization dehydration is identical with positive compression technology.
Potass pool is interior with calcium carbonate (CaCO
3) make desulfurizing agent, desulfurization product is used to produce calcium silicates, and the alkali lye in the potass pool is with sodium carbonate (NaCO
3) make desulfurizing agent, desulfurization product is as producing sodium metasilicate.
Claims (3)
1. industrial silicon electric furnace flue gas dust-removing and desulfurization process; It is characterized in that: technological process is by cooler, dual stage cyclone deduster, dry-method bag-type deduster, air-introduced machine, the dewatering integrated tower of dust-removal and desulfurizing, roots blower, density storehouse, gas-solid separator, potass pool, mud pit, water pump, agitated reactor technological equipment; Reclaim silicon powder with the dry-method bag-type deduster earlier; Then adopt the dewatering integrated tower of wet dedusting desulfurization to the desulfurization of flue gas final dusting; The positive compression technology of industrial silicon electric furnace flue gas dust-removal and desulfurizing is: through cooler, dual stage cyclone deduster, air inducing, dry-method bag-type deduster; Roots blower and the gas-solid separator of flue gas through connecting on the density storehouse has the Pneumatic ash conveying blower fan on the gas-solid separator, pure qi (oxygen) discharging behind gas-solid separator; Flue gas after the dedusting of dry-method bag-type deduster passes through the dewatering integrated tower desulfurization of dust-removal and desulfurizing again; Alkali lye in the potass pool pumps in the dewatering integrated tower of wet dedusting desulfurization through water pump, and pure qi (oxygen) is from smoke stack emission, and agitated reactor links to each other with the dewatering integrated tower of mud pit and dust-removal and desulfurizing; Industrial silicon electric furnace flue gas dust-removal and desulfurizing negative pressure technology is: electric furnace flue gas directly inserts the dry-method bag-type deduster through cooler, dual stage cyclone deduster and reclaims silicon powder earlier; Pass through air-introduced machine and gas-solid separator again; Roots blower and density storehouse and gas-solid separator have saved the Pneumatic ash conveying blower fan, and the flue gas that air-introduced machine is drawn gets into the dewatering integrated tower of dust-removal and desulfurizing; Carry out the secondary wet process dust-removal and desulfurizing, the technology of wet dedusting desulfurization dehydration is identical with above-mentioned positive compression technology.
2. industrial silicon electric furnace flue gas dust-removing and desulfurization process according to claim 1 is characterized in that: the alkali lye in the said potass pool is made desulfurizing agent with calcium carbonate, and desulfurization product is used to produce calcium silicates.
3. industrial silicon electric furnace flue gas dust-removing and desulfurization process according to claim 1 and 2 is characterized in that: in the described potass pool with sodium carbonate make desulfurizing agent, desulfurization product is used to produce sodium metasilicate.
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|---|---|---|---|
| CN2012102672038A CN102764579A (en) | 2012-07-31 | 2012-07-31 | Dedusting and desulfurizing technique of industrial silicon metal furnace smoke |
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| CN2012102672038A CN102764579A (en) | 2012-07-31 | 2012-07-31 | Dedusting and desulfurizing technique of industrial silicon metal furnace smoke |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103977654A (en) * | 2014-05-04 | 2014-08-13 | 遵义市贵科科技有限公司 | High-efficiency wet-type dedusting desulfurization and denitrification equipment and process |
| CN106582179A (en) * | 2016-12-31 | 2017-04-26 | 天津市宝坻区发达造纸有限公司 | Boiler flue gas treatment process |
| CN108554149A (en) * | 2018-05-29 | 2018-09-21 | 贵州环科环境工程有限公司 | Flue gas de-dusting process |
Citations (7)
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|---|---|---|---|---|
| JPH05146635A (en) * | 1991-12-03 | 1993-06-15 | Hokkaido Electric Power Co Inc:The | Dry exhaust gas treatment method |
| WO2001049395A1 (en) * | 1999-12-30 | 2001-07-12 | Shanmao Zhao | Method of treating exhaust gas from coal fired boiler |
| CN201101939Y (en) * | 2007-08-27 | 2008-08-20 | 于波涛 | Desulfurating dust removing device for flue gas |
| CN101700463A (en) * | 2008-02-19 | 2010-05-05 | 孙伟杰 | Method for desulfurating and denitrating and recovering sulfur resource in closed cycle way |
| CN101966415A (en) * | 2010-10-22 | 2011-02-09 | 无锡翱翔环保机械有限公司 | High-efficient energy-saving two-tower desulfurizing and dust removing device system |
| CN102100990A (en) * | 2009-12-18 | 2011-06-22 | 遵义市中德环保有限公司 | New technology for electric furnace smoke purification and recovery of silicon powder during production of silicon metal |
| CN202270476U (en) * | 2011-10-24 | 2012-06-13 | 遵义市贵科科技有限公司 | Efficient wet type dust-removal desulfurization integrated tower |
-
2012
- 2012-07-31 CN CN2012102672038A patent/CN102764579A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05146635A (en) * | 1991-12-03 | 1993-06-15 | Hokkaido Electric Power Co Inc:The | Dry exhaust gas treatment method |
| WO2001049395A1 (en) * | 1999-12-30 | 2001-07-12 | Shanmao Zhao | Method of treating exhaust gas from coal fired boiler |
| CN201101939Y (en) * | 2007-08-27 | 2008-08-20 | 于波涛 | Desulfurating dust removing device for flue gas |
| CN101700463A (en) * | 2008-02-19 | 2010-05-05 | 孙伟杰 | Method for desulfurating and denitrating and recovering sulfur resource in closed cycle way |
| CN102100990A (en) * | 2009-12-18 | 2011-06-22 | 遵义市中德环保有限公司 | New technology for electric furnace smoke purification and recovery of silicon powder during production of silicon metal |
| CN101966415A (en) * | 2010-10-22 | 2011-02-09 | 无锡翱翔环保机械有限公司 | High-efficient energy-saving two-tower desulfurizing and dust removing device system |
| CN202270476U (en) * | 2011-10-24 | 2012-06-13 | 遵义市贵科科技有限公司 | Efficient wet type dust-removal desulfurization integrated tower |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103977654A (en) * | 2014-05-04 | 2014-08-13 | 遵义市贵科科技有限公司 | High-efficiency wet-type dedusting desulfurization and denitrification equipment and process |
| CN106582179A (en) * | 2016-12-31 | 2017-04-26 | 天津市宝坻区发达造纸有限公司 | Boiler flue gas treatment process |
| CN108554149A (en) * | 2018-05-29 | 2018-09-21 | 贵州环科环境工程有限公司 | Flue gas de-dusting process |
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Application publication date: 20121107 |