CN2763284Y - Gravity type dust collector for blast-furnace gas - Google Patents
Gravity type dust collector for blast-furnace gas Download PDFInfo
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- CN2763284Y CN2763284Y CN 200420118844 CN200420118844U CN2763284Y CN 2763284 Y CN2763284 Y CN 2763284Y CN 200420118844 CN200420118844 CN 200420118844 CN 200420118844 U CN200420118844 U CN 200420118844U CN 2763284 Y CN2763284 Y CN 2763284Y
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- dust
- dust collector
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Abstract
The utility model relates to a gravity dust collector for blast-furnace gas, which is particularly suitable for dry dust removal for a large blast furnace gas. The gravity dust collector for the blast-furnace gas comprises a barrel body of the dust collector and a center flared pipe. The utility model is characterized in that the walls of the barrel body (1) of the dust collector and the center flared pipe (2) are provided with dust blocking fins (3) to increase the blocking effect of dust particles so as to improve dust removing efficiency. In addition, the diameter of the gravity dust collector is increased, the straight segment height is increased, so that the air current speed is reduced and the stay time is prolonged. The utility model improves dust cleaning efficiency, improves the effect of the dust collector, causes the dust quantity of the cloth-bag dust collector to reduce, and is favorable for dry dust removing work.
Description
Technical field
The utility model belongs to technical field of blast furnace ironmaking in the Iron And Steel Industry, is applicable to the blast furnace gas gravitational dust collection.
Background technology
At present, blast furnace gas purification is meant after dust-laden coal gas is through the thick dedusting of gravitational precipitator and enters wet method or the meticulous dedusting of nonaqueous dust cleaner that making dustiness drop to milligram level level can use.The about 55-60% of gravitational precipitator efficiency of dust collection or higher, this efficient direct relation the quality of a back smart dedusting job of step.Wish especially that for dry method dust macrobead dust as much as possible removes in advance, reduce its ash load, improve working condition.So how to improve the gravitational precipitator structure, improving efficiency of dust collection is a problem of current research.
The blast furnace gas gravitational precipitator all is the diameter number meter pressure vessel to tens meters cylindrical steel plate, and straight section height and diameter dimension are close, and the bottom is conical ash bucket, and centre portions has the coal gas inlet tube.Thick dust-cleaning principle is after dust-laden coal gas enters, and gas produces and expands, transfers, slows down in fly-ash separator, and the numerous and confused sedimentation of macrobead coal gas ash falls among the ash bucket.Raw gas after the thick dedusting is derived through the outlet pipe on top, enters next step dry method or the smart dedusting of wet method.Gravitational precipitator efficient is just concerning the dry-method bag-type dust collecting of smart dust removing effects, particularly next step employing, more requires gravitational dust collection to play one's part to the full.
Present gravitational precipitator dust removing effects is undesirable, still has a large amount of grits to enter bag-type dust, causes pipeline deposition, equipment attrition, and therefore how improving dust removing effects is exactly an important research project, and the utility model just is intended to solve this key issue.
Summary of the invention
The purpose of this utility model is to improve on existing gravitational precipitator structure foundation, improves efficiency of dust collection, to improve next step smart dust separating working conditions.
The utility model relates to a kind of blast furnace gas gravitational precipitator, comprises fly-ash separator cylindrical shell and center oviduct, it is characterized in that: the grey fin of retaining is housed on the wall of fly-ash separator cylindrical shell and center oviduct.
Keeping off grey fin and wall angle α is 20 °-80 °, fin windward side spraying abrasion-proof coating.
The diameter d of fly-ash separator cylindrical shell strengthens, and guarantees that gas speed is no more than 0.5-1.0 second/rice, is slightly less than standard numerical value.The fly-ash separator straight section height strengthens, and makes the coal gas residence time surpass 14-15 second.
The beneficial effects of the utility model are: improve efficiency of dust collection, improve next step smart dust separating working conditions.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is a sectional structure chart of the present utility model
Grey fin 4. Unloading ball valves of 1. gravitational precipitator cylindrical shell 2. center oviducts, 3. retainings among the figure
Embodiment
In Fig. 1, the grey fin 3 of retaining of on gravitational precipitator cylindrical shell 1 and center oviduct 2 walls, burn-oning respectively.Fin is equipped with certain size and gradient, is conical, and the α angle is 20 °-80 °, makes coal gas stream be crooked and upwards flows, and the coal gas soot particle had certain inertia and baffle plate to produce collision, reflection and dropped this moment.
The diameter of fly-ash separator cylindrical shell 1 and straight section height strengthen on original design size, increase in addition, and the size of the diameter d of fly-ash separator cylindrical shell 1 makes gas speed be no more than 0.5-1.0 second/Mi Weiyi.Gas velocity is slowed down, and the residence time prolongs, and therefore the more dusts of energy sedimentation improve efficiency of dust collection.
Analyze according to coal gas is flowed to, it is conical baffled that two circles have been installed respectively on tube wall of dust settler and center tube wall.Coal gas flows out from the center oviduct, enters a big space and has produced unexpected expansion, deceleration and 180 degree turnovers, makes the numerous and confused sedimentation of macrobead dust.Then grit adds baffle plate collision again and newly in the air-flow, produces reflection and loses kinetic energy and drop.Baffle plate has played the effect of radiation shield, has increased dust removing effects, has improved efficiency of dust collection.
The utility model also relates to the improvement of lowering gas speed.Be further depositing dust, on original design basis, strengthened gravitational dust collection body diameter dimension, increase straight section height, reduce gas speed, prolong air communication and spend the time, thereby increased the rate of descent of dust.
With certain blast furnace is example: coal gas generating capacity 230,000 m
3/ h.Original design gravitational precipitator diameter is Φ 9.0m, for the back step is adopted dry method dust, changes diameter into Φ 10.0m, and straight section height is also suitably increased.Therefore gas speed is reduced to 0.81m/s from 1m/s, and the residence time also was increased to 14 seconds from 10 seconds, had increased the cleaning efficiency of fly-ash separator.
Above several respects are improved as long as change a little in construction, and quantities and consumption of materials increase few, but make efficiency of dust collection that certain increase is arranged, and have improved the working conditions of dry method dust.Seeing that from big aspect it has advanced dry method dust to use at large blast furnace, is one of numerous success factors.
Facts have proved that above measure can make the physical behavior of gravitational precipitator outlet coal gas ash different, can have some difference to reflect from dry method dust sack dust proportion.The bulk density of different blast furnace cloth bag ashes is from 250kg/m
3～1100kg/m
3, alter a great deal, objectively responded the effect of settling of fly-ash separator.
Claims (3)
1. a blast furnace gas gravitational precipitator comprises fly-ash separator cylindrical shell and center oviduct, it is characterized in that: retaining grey fin (3) is housed on the wall of fly-ash separator cylindrical shell (1) and center oviduct (2).
2. blast furnace gas gravitational precipitator as claimed in claim 1 is characterized in that: keeping off grey fin (3) is 20 °-80 ° with wall angle α, keeps off grey fin (3) windward side and is coated with wear-resistant paint.
3. blast furnace gas gravitational precipitator as claimed in claim 1 is characterized in that: the size of the diameter d of fly-ash separator cylindrical shell (1) decision gas speed is no more than 0.5-1.0 second/rice, and straight section height makes the coal gas residence time above 14-15 second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420118844 CN2763284Y (en) | 2004-12-28 | 2004-12-28 | Gravity type dust collector for blast-furnace gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420118844 CN2763284Y (en) | 2004-12-28 | 2004-12-28 | Gravity type dust collector for blast-furnace gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2763284Y true CN2763284Y (en) | 2006-03-08 |
Family
ID=36140831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420118844 Expired - Lifetime CN2763284Y (en) | 2004-12-28 | 2004-12-28 | Gravity type dust collector for blast-furnace gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2763284Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101684506B (en) * | 2008-09-27 | 2011-01-19 | 上海梅山钢铁股份有限公司 | Dust removing system and processing method of blast furnace raw gas |
| CN103068456A (en) * | 2010-05-10 | 2013-04-24 | 热费希尔科学公司 | Particulate matter monitor |
| CN103866067A (en) * | 2014-03-04 | 2014-06-18 | 中冶南方工程技术有限公司 | Blast furnace coal gas gravitational dust collector with cooling effect |
| CN104328234A (en) * | 2014-11-24 | 2015-02-04 | 中冶赛迪工程技术股份有限公司 | Rough collection device and method for gas and dust from blast furnace |
| CN104729886A (en) * | 2013-12-18 | 2015-06-24 | 宝山钢铁股份有限公司 | Water-dust-oil automatic separation device for gas sampling |
| CN105349723A (en) * | 2015-12-08 | 2016-02-24 | 中冶京诚工程技术有限公司 | Combined type dry dust removal equipment |
| CN105536359A (en) * | 2015-12-11 | 2016-05-04 | 中冶华天南京工业炉有限公司 | High-efficiency gravity dust remover |
| CN107739765A (en) * | 2017-10-13 | 2018-02-27 | 中冶华天工程技术有限公司 | A kind of CCPP system bypass coal gas pressure and temperature reducing and waste heat recovery apparatus |
| CN109268817A (en) * | 2016-12-23 | 2019-01-25 | 泉州齐美电子科技有限公司 | Biomass combustion furnace heating system |
-
2004
- 2004-12-28 CN CN 200420118844 patent/CN2763284Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101684506B (en) * | 2008-09-27 | 2011-01-19 | 上海梅山钢铁股份有限公司 | Dust removing system and processing method of blast furnace raw gas |
| CN103068456A (en) * | 2010-05-10 | 2013-04-24 | 热费希尔科学公司 | Particulate matter monitor |
| CN103068456B (en) * | 2010-05-10 | 2015-09-16 | 热费希尔科学公司 | Particulate matter monitor |
| CN104729886A (en) * | 2013-12-18 | 2015-06-24 | 宝山钢铁股份有限公司 | Water-dust-oil automatic separation device for gas sampling |
| CN103866067A (en) * | 2014-03-04 | 2014-06-18 | 中冶南方工程技术有限公司 | Blast furnace coal gas gravitational dust collector with cooling effect |
| CN104328234A (en) * | 2014-11-24 | 2015-02-04 | 中冶赛迪工程技术股份有限公司 | Rough collection device and method for gas and dust from blast furnace |
| CN105349723A (en) * | 2015-12-08 | 2016-02-24 | 中冶京诚工程技术有限公司 | Combined type dry dust removal equipment |
| CN105536359A (en) * | 2015-12-11 | 2016-05-04 | 中冶华天南京工业炉有限公司 | High-efficiency gravity dust remover |
| CN109268817A (en) * | 2016-12-23 | 2019-01-25 | 泉州齐美电子科技有限公司 | Biomass combustion furnace heating system |
| CN109268817B (en) * | 2016-12-23 | 2021-02-26 | 黑龙江庆翔热电有限公司 | Biomass combustion furnace heating system |
| CN107739765A (en) * | 2017-10-13 | 2018-02-27 | 中冶华天工程技术有限公司 | A kind of CCPP system bypass coal gas pressure and temperature reducing and waste heat recovery apparatus |
| CN107739765B (en) * | 2017-10-13 | 2019-02-19 | 中冶华天工程技术有限公司 | A kind of CCPP system bypass coal gas pressure and temperature reducing and waste heat recovery apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141228 Granted publication date: 20060308 |