CN1222404A - Positive pressure filtration process for smoke purification during duriron smelting - Google Patents
Positive pressure filtration process for smoke purification during duriron smelting Download PDFInfo
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- CN1222404A CN1222404A CN 98118188 CN98118188A CN1222404A CN 1222404 A CN1222404 A CN 1222404A CN 98118188 CN98118188 CN 98118188 CN 98118188 A CN98118188 A CN 98118188A CN 1222404 A CN1222404 A CN 1222404A
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- flue gas
- dust
- positive pressure
- smelting
- main air
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- Filtering Of Dispersed Particles In Gases (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The present invention features that flue gas after being cooled is first pre-treated in pre-treater to eliminate large dust particles, then led by the main blower into bag-type dust remover for positive pressure filtration, and finally discharged naturally. The dust collected inside the bag may be packed for sale. In the flue gas pipeline, one by-pass pipe with valve is connected parallelly with the cooler and one suction blower is connected parallelly with the main blower. The present invention can recover dust with over 92% silica content and make the amount of discharged smoke greatly lower than relevant requirement.
Description
The present invention relates to ferrosilicon smelting gas cleaning filtering technique.
Existing ferrosilicon smelting flue gas process for purifying is flue gas negative pressure filtration system, be that the high-temperature flue gas that rises in the hot stove of avasite cools off through gas cooler, directly enter in the sack cleaner, utilize main air blower to make negative pressure, carry out dedusting after making flue gas inhale sack cleaner, clean flue gas discharges in the atmosphere by main air blower, and this dust collecting process has following shortcoming: the one, and floor space is big; The 2nd, high to the sealing property requirement of sack cleaner, promptly the negative pressure to deduster requires tight; The 3rd, the main air blower idle work is many, and power is big, the power consumption height; The 4th, because flue gas directly carries out in the sack cleaner, the big dust particle in the flue gas easily punctures cloth bag, and the cloth bag of sack cleaner is reduced service life, the dust removing effects variation, and dioxide-containing silica is low in the dust of recovery, inconvenient maintenance; The 5th, investment is big, the use cost height.
The objective of the invention is to improve the filter effect of ferrosilicon flue gas purification system, reduce cost of investment and use cost, improve the quality of SILICA FUME quality and discharging flue gas.
The technical scheme that the present invention intends taking is: a kind of positive pressure filtration process for smoke purification during duriron smelting, by gas cooler, compositions such as main air blower, it is characterized in that flue gas in the hot stove of avasite is after gas cooler cooling, enter the flue gas preprocessor and carry out removing in advance of big dust particle, utilize main air blower with the flue gas supercharging then, flue gas after the supercharging imports the filtration of carrying out the granule dust in the sack cleaner, clean flue gas after the filtration discharges in the atmosphere, in flue gas pipeline, a short circuit smoke pipe in parallel with gas cooler, one valve is set, a back suction blower fan in parallel on the short circuit smoke pipe with main air blower.
Use the present invention that following advantage is arranged: the one, reduce investment 30%, two, it is nearly 40%, three to have reduced floor space, and smoke discharge amount is by the 150mg/Nm of original negative pressure cleaning system
3Be reduced to present 50mg/Nm
3Below, the 4th, compare energy-conservation 20% with the negative pressure filtration system, reduced idle work to greatest extent, the 5th, improved the product quality of SILICA FUME, containing silica 80% in the dust by original negative pressure system recovery brings up to more than 92%, the 6th, prolong one times of service life of cloth bag in the sack cleaner effectively, and improved maintenance condition and condition of work.
The invention will be further described below in conjunction with accompanying drawing.
Accompanying drawing is a technological process block-diagram of the present invention.
Work of the present invention is, high-temperature flue gas rises from the hot stove of avasite, be introduced in the gas cooler (the air-cooled gas cooler of coil pipe water-cooled gas cooler or coil pipe) by main air blower and carry out flue gas cool-down, flue gas after the cooling removes the large granular impurity dust in the flue gas in advance by flue gas preprocessor (number of patent application is 98216573.0 adjustable dust preprocessor or cyclone dust collectors), in order to avoid big dust particle enters in the sack cleaner cloth bag is punctured and the reduction dust removing effects, also improve simultaneously the content of silica in the dust that reclaims in the sack cleaner, the flue gas that removes in advance imports sack cleaner after the main air blower supercharging (as using number of patent application is 98216679.6, the secondary air sack cleaner) filters in, clean flue gas after the filtration enters in the atmosphere, for sale by the dust that the cloth bag filtration gets off through collecting packing, if DE Smoke temperature degree is lower from the hot stove of avasite, then can flue gas directly be entered in the flue gas preprocessor short circuit smoke pipe valve open; If laying dust is more in the cloth bag in the sack cleaner, and when influencing efficiency of dust collection, close the air intake valve of sack cleaner, open the back suction blower fan, dust back suction in the cloth bag is fallen after rise, and then close the back suction blower fan, open sack cleaner air intake valve and carry out normal dedusting.
Claims (1)
1, a kind of positive pressure filtration process for smoke purification during duriron smelting, form by gas cooler, main air blower etc., it is characterized in that flue gas in the hot stove of avasite is after gas cooler cooling, entering the flue gas preprocessor carries out big dust particle and removes in advance, utilize main air blower with the flue gas supercharging then, flue gas after the supercharging imports the filtration of carrying out the granule dust in the sack cleaner, clean flue gas after the filtration discharges in the atmosphere, a short circuit smoke pipe in parallel in flue gas pipeline with gas cooler, one valve is set, a back suction blower fan in parallel on the short circuit smoke pipe with main air blower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98118188A CN1060407C (en) | 1998-09-11 | 1998-09-11 | Positive pressure filtration process for smoke purification during duriron smelting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98118188A CN1060407C (en) | 1998-09-11 | 1998-09-11 | Positive pressure filtration process for smoke purification during duriron smelting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1222404A true CN1222404A (en) | 1999-07-14 |
| CN1060407C CN1060407C (en) | 2001-01-10 |
Family
ID=5225953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98118188A Expired - Fee Related CN1060407C (en) | 1998-09-11 | 1998-09-11 | Positive pressure filtration process for smoke purification during duriron smelting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1060407C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101385935B (en) * | 2008-05-23 | 2011-04-27 | 南安市三晶阳光电力有限公司 | Water-cooling dust-separating method of metallic silicon smelting furnace |
| CN101269813B (en) * | 2008-04-15 | 2012-01-04 | 北京民海艳科技有限公司 | Novel technique for purification recovery of tiny silica flour |
| CN101746765B (en) * | 2008-12-01 | 2012-04-18 | 贵州海天铁合金磨料有限责任公司 | Method and device for separating and purifying silicon dioxide micropowder from electric furnace dust |
| CN109092527A (en) * | 2018-08-09 | 2018-12-28 | 宜宾丝丽雅股份有限公司 | Viscose grinding process |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1012378B (en) * | 1988-10-24 | 1991-04-17 | 营口市有色金属提炼改制厂 | Recovery technique of zinc oxide by treatment of dust during smelting copper from copper ash |
| CN1044134C (en) * | 1996-05-09 | 1999-07-14 | 冶金工业部重庆钢铁设计研究院 | Blast furnace gas temp. regulation technology system |
-
1998
- 1998-09-11 CN CN98118188A patent/CN1060407C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101269813B (en) * | 2008-04-15 | 2012-01-04 | 北京民海艳科技有限公司 | Novel technique for purification recovery of tiny silica flour |
| CN101385935B (en) * | 2008-05-23 | 2011-04-27 | 南安市三晶阳光电力有限公司 | Water-cooling dust-separating method of metallic silicon smelting furnace |
| CN101746765B (en) * | 2008-12-01 | 2012-04-18 | 贵州海天铁合金磨料有限责任公司 | Method and device for separating and purifying silicon dioxide micropowder from electric furnace dust |
| CN109092527A (en) * | 2018-08-09 | 2018-12-28 | 宜宾丝丽雅股份有限公司 | Viscose grinding process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1060407C (en) | 2001-01-10 |
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