CN1818080A - Gas totally-drying purifying dust-collecting process of blast-furnace - Google Patents
Gas totally-drying purifying dust-collecting process of blast-furnace Download PDFInfo
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- CN1818080A CN1818080A CN 200610031121 CN200610031121A CN1818080A CN 1818080 A CN1818080 A CN 1818080A CN 200610031121 CN200610031121 CN 200610031121 CN 200610031121 A CN200610031121 A CN 200610031121A CN 1818080 A CN1818080 A CN 1818080A
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Abstract
The invention is about the blast furnace gas oven-dry decontamination dedusting technology. The dust-laden gas enter the gravity dust separator firstly, then enter the every dedusting subsystem pipes through the main pipe, next to enter the every bag-type dust collector to remove the dust precisely, then the cleaning gas enter the system purified gas pipe to enter the supplying purified gas pipe net through the dry-type turbine or the reducing valve. The bag-type dust collector system includes at least more than three dedusting subsystems which include at least more than five dedusting boxes, and the shutoff device is installed in the gas pipe. The invention achieves the blast furnace gas oven-dry bag-type dedusting, so it can increase the gas latent heat and the electric power generation ratio.
Description
[technical field]
The present invention relates to a kind of dry-type process for dusting gas of blast furnace that can improve reliability of system operation, realize absolutely dry method bag-type dust.
[background technology]
Explanation of nouns: TRT: blast-furnace top gas recovery recovery gas turbine generating set
At present, the method for dust removal of blast furnace gas has two kinds: a kind of is blast furnace gas dry dusting, another kind is the blast furnace gas wet dedusting, owing to blast furnace gas dry dusting has the developing direction that the considerable energy saving advantage becomes current large blast furnace gas purification than wet method dedusting.
Blast furnace gas cloth bag dedusting process belongs to dry method dust, mainly there are the following problems for this method: process pipeline is many, single devices such as pipeline compensator, by-pass valve control, fly-ash separator body are many, cause system failure rate higher, system reliability is poor, the single devices fault handling needs system to stop transport, and influences blast furnace production; Because this method single devices is many, failure rate is higher, only is adapted to 2000m
3The dedusting of blast furnace gas that level is following only is used for 1800m at present both at home and abroad
3Following dedusting of blast furnace gas.
Existing 2000m
3The above dedusting of blast furnace gas of level mainly adopts wet dedusting or dry-method bag-type dust collecting to add wet method dedusting (standby each other), and wet dedusting is unfavorable for energy-conservation, also is unfavorable for environmental protection; Dry cloth bag adds the wet method dedusting, and investment is big, is unfavorable for energy-conservationly, is unfavorable for that also personnel dispose and operate, and moves also uneconomical.
[summary of the invention]
In order to overcome the above-mentioned shortcoming of prior art, the invention provides a kind of dry-type process for dusting gas of blast furnace that can improve reliability of system operation, realize absolutely dry method bag-type dust.
The technical solution adopted for the present invention to solve the technical problems is: dry-type process for dusting gas of blast furnace, will be from the dust-laden coal gas of blast furnace, be introduced into gravitational precipitator and carry out thick dedusting, raw gas after the thick dedusting is responsible for through system's raw gas and is entered each dedusting subsystem raw gas person in charge, enter each sack cleaner casing again and carry out smart dedusting, clean heating gas after the smart dedusting is responsible for through each subsystem purified gas and is entered the purified gas person in charge of system, outer through entering again after dry type turbine or the reducing valve group again for purified gas person in charge net, described sack cleaner system is divided into the dedusting subsystem more than at least three, each subsystem has the dust-removing box more than five at least, and each subsystem is imported and exported waste, purified gas is all established reliable shut-off device on being responsible for.
Be divided into four to six groups according to blast furnace size or coal gas amount how many determined dust-removing box sums in the described sack cleaner system, promptly be divided into four to six dedusting subsystems, import and export on the pipe for every group and set up reliable shut-off device.
When the gas temperature that described gravitational precipitator comes out surpasses or is lower than the temperature that sack cleaner allows, by the regulating and controlling valving, coal gas partly or entirely enters gas change heater, cool the temperature to below 280 ℃ or rise to more than 80 ℃ after enter bag-type dust removal system and carry out smart dedusting.
Described gas temperature interchanger is divided into two to three groups, imports and exports on the pipe for every group and sets up reliable shut-off device.
When single subsystem equipment, pipe network and the annex of described bag-type dust removal system breaks down, close this fault subsystem in this dust-removal system, realize the off-line maintenance of this dedusting subsystem (i.e. this group) by cutting-off valve.The dedusting coal gas amount that this dedusting subsystem is born between turn(a)round is born jointly by other several dedusting subsystems.
Positively effect of the present invention is: realized the absolutely dry method bag-type dust of large blast furnace, cancelled the standby wet method dedusting system of large blast furnace coal gas dust removal in the past; Increase coal gas latent heat, improve turbine generating rate and realize burnt, the water saving of blast furnace joint.
[description of drawings]
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a process flow sheet of the present invention.
Among the figure: the 1-blast furnace, the 2-gravitational precipitator, the 3-valving, the 4-sack cleaner, 5-relief valve group, 6-TRT, the 7-interchanger, 8-purified gas house steward, tower is diffused in the 9-burning.
[embodiment]
Referring to Fig. 1, will be from the dust-laden coal gas of blast furnace 1, be introduced into gravitational precipitator 2 and carry out thick dedusting, raw gas after the thick dedusting is responsible for through system's raw gas and is entered each dedusting subsystem raw gas person in charge, enter each sack cleaner 4 casing again and carry out smart dedusting, clean heating gas after the smart dedusting is responsible for through each subsystem purified gas and is entered the purified gas person in charge of system, outer through entering again after dry type turbine 6 or the reducing valve group again for purified gas person in charge net 8, at first each fly-ash separator 4 casing of bag-type dust removal system are divided into four to six groups according to the casing sum, promptly be divided into four to six dedusting subsystems, each dedusting subsystem contains the dust-removing box more than five, and each dedusting subsystem (each group) is imported and exported on the pipe and set up reliable cutting-off valve group 3; Secondly, gas temperature interchanger 7 is divided into two to three groups, imports and exports on the pipe for every group and set up reliable cutting-off valve group 3.
Under the normal circumstances, by the dust-laden blast furnace gas that blast furnace 1 comes out, after being introduced into gravitational precipitator 2 and carrying out thick dedusting, enter through regulated valve group 3 and respectively to organize sack cleaner 4 subsystems and carry out smart dedusting, enter sack cleaner 4 system's purified gas again and be responsible for, enter turbine generators 6 again; When turbine generators 6 hinders when maintenance for some reason, the coal gas that comes out from dust-removal system through relief valve group 5 after, enter purified gas main pipeline network 8 again.
At igniting and operation initial stage, CO content is low in the coal gas, and dustiness is low, and waste gas without dust-removal system, directly causes through pipeline valve group 3 and diffuses tower 9 and burn and diffuse after gravitational precipitator 2 thick dedusting.
When gas temperature that gravitational precipitator 2 comes out surpasses temperature that sack cleaner allows more than 280 ℃ or when being lower than below 80 ℃, by regulating and controlling valving 3, coal gas partly or entirely enter gas change heater 7 reduce to below 280 ℃ or rise to temperature more than 80 ℃ after enter sack cleaner 4 systems and carry out smart dedusting.
Break down except waste purified gas pipeline, equipment and the piping attachment between cutting-off valve group 3, dust-removing box body,, realize the off-line maintenance of this subsystem by closing the cutting-off valve group 3 of this dedusting subsystem (this group).The dedusting coal gas load of this subsystem was born by other subsystem between turn(a)round.Do not influence blast furnace production.
The present invention has realized the absolutely dry method bag-type dust of large blast furnace, cancels the standby wet method dedusting system of large blast furnace coal gas dust removal in the past; Increase coal gas latent heat, improve turbine generating rate and realize burnt, the water saving of blast furnace joint.With 2500m
3The blast furnace gas all dry cloth bag dedusting process is an example:
Coal gas generating capacity: 430000-480000m
3/ h;
Gas pressure :≤250kPa;
Cloth bag working temperature: 80-280 ℃.
Will be from the dust-laden coal gas of blast furnace 1, be introduced into gravitational precipitator 2 and carry out thick dedusting, raw gas after the thick dedusting is responsible for through system's raw gas and is entered each dedusting subsystem raw gas person in charge, enter each sack cleaner 4 casing again and carry out smart dedusting, clean heating gas after the smart dedusting is responsible for through each subsystem purified gas and is entered the purified gas person in charge of system 8, outer through entering again after dry type turbine 6 or the reducing valve group again for purified gas person in charge net, at first each fly-ash separator 4 casing of bag-type dust removal system are divided into four groups according to the casing sum, promptly be divided into four dedusting subsystems, each dedusting subsystem contains seven dust-removing boxs, and each casing dust collection capacity is 15000-20000m
3/ h.Each dedusting subsystem (each group) is imported and exported the reliable cutting-off valve group 3 of Guan Shangshe.Secondly, gas temperature interchanger 7 is divided into two groups, every group of three interchanger are imported and exported the reliable cutting-off valve group 3 of Guan Shangshe for every group.
Under the normal circumstances, the dust-laden blast furnace gas that comes out by blast furnace 1, after being introduced into gravitational precipitator 2 and carrying out thick dedusting, enter through regulated valve group 3 and respectively to organize sack cleaner 4 subsystems and carry out smart dedusting, entering sack cleaner system purified gas again is responsible for, enter turbine generators 6 (when turbine generators 6 hinders maintenance for some reason) again, enter purified gas main pipeline network 8 again from coal gas process relief valve group 5 backs that dust-removal system is come out.
At igniting and operation initial stage, CO content is low in the coal gas, and dustiness is low, and waste gas without dust-removal system, directly causes through pipeline valve group 3 and diffuses tower 9 and burn and diffuse after gravitational precipitator 2 thick dedusting.
When gas temperature that gravitational precipitator comes out surpasses temperature that sack cleaner allows more than 280 ℃ or when being lower than below 80 ℃, by regulated valve group 3 coal gas partly or entirely enter gas change heater 7 reduce to below 280 ℃ or rise to temperature more than 80 ℃ after enter bag-type dust removal system and carry out smart dedusting.
When cutting-off valve group 3 waste purified gas pipelines, equipment and piping attachment (except the dust-removing box body) break down,, realize the off-line maintenance of this subsystem by closing the cutting-off valve group 3 of this dedusting subsystem (this group).The dedusting coal gas load of this subsystem is born the dedusting task by other subsystem between turn(a)round.Do not influence blast furnace production.
With 5000m
3The blast furnace gas all dry cloth bag dedusting process is an example:
Coal gas generating capacity: 800000-850000m
3/ h;
Gas pressure :≤250kPa;
Cloth bag working temperature: 80 ℃-280 ℃.
Will be from the dust-laden coal gas of blast furnace 1, be introduced into gravitational precipitator 2 and carry out thick dedusting, raw gas after the thick dedusting is responsible for through system's raw gas and is entered each dedusting subsystem raw gas person in charge, enter each sack cleaner 4 casing again and carry out smart dedusting, clean heating gas after the smart dedusting is responsible for through each subsystem purified gas and is entered the purified gas person in charge of system 8, outer through entering again after dry type turbine 6 or the reducing valve group again for purified gas person in charge net, referring to Fig. 1, at first each dust-removing box 4 of bag-type dust removal system is divided into four groups according to the casing sum, promptly be divided into four dedusting subsystems, each dedusting subsystem contains seven dust-removing boxs, and each casing dust collection capacity is 20000-30000m
3Each dedusting subsystem of/h (each group) is imported and exported the reliable cutting-off valve group 3 of Guan Shangshe.Secondly, gas temperature interchanger 7 is divided into three groups, every group of four interchanger are imported and exported the reliable cutting-off valve group 3 of Guan Shangshe for every group.
Under the normal circumstances, the dust-laden blast furnace gas that comes out by blast furnace 1, after being introduced into gravitational precipitator 2 and carrying out thick dedusting, enter through regulated valve group 3 and respectively to organize sack cleaner 4 subsystems and carry out smart dedusting, entering sack cleaner system purified gas again is responsible for, enter turbine generators 6 (when turbine generators 6 hinders maintenance for some reason) again, enter purified gas main pipeline network 8 again from coal gas process relief valve group 5 backs that dust-removal system is come out.
At igniting and operation initial stage, CO content is low in the coal gas, and dustiness is low, and waste gas without dust-removal system, directly causes through pipeline valve group 3 and diffuses tower 9 and burn and diffuse after gravitational precipitator 2 thick dedusting.When gas temperature that gravitational precipitator comes out surpasses temperature that sack cleaner allows more than 280 ℃ or when being lower than below 80 ℃, by regulated valve 3, coal gas partly or entirely enter gas change heater 7 reduce to below 280 ℃ or rise to temperature more than 80 ℃ after enter bag-type dust removal system and carry out smart dedusting.
When cutting-off valve group 3 waste purified gas pipelines, equipment and piping attachment (except the dust-removing box body) break down,, realize the off-line maintenance of this subsystem by closing the cutting-off valve group 3 of this dedusting subsystem (this group).The dedusting coal gas load of this subsystem was born by other subsystem between turn(a)round.Do not influence blast furnace production.
Claims (5)
1, dry-type process for dusting gas of blast furnace, will be from the dust-laden coal gas of blast furnace, be introduced into gravitational precipitator and carry out thick dedusting, raw gas after the thick dedusting is responsible for through system's raw gas and is entered each dedusting subsystem raw gas person in charge, enter each sack cleaner casing again and carry out smart dedusting, clean heating gas after the smart dedusting is responsible for through each subsystem purified gas and is entered the purified gas person in charge of system, outer through entering again after dry type turbine or the reducing valve group again for purified gas person in charge net, it is characterized in that: described sack cleaner system is divided into the dedusting subsystem more than at least three, each subsystem has the dust-removing box more than five at least, and each subsystem is imported and exported waste, purified gas is all established reliable shut-off device on being responsible for.
2, dry-type process for dusting gas of blast furnace according to claim 1, it is characterized in that: be divided into four to six groups according to blast furnace size or coal gas amount how many determined dust-removing box sums in the described sack cleaner system, promptly be divided into four to six dedusting subsystems, import and export on the pipe for every group and set up reliable shut-off device.
3, dry-type process for dusting gas of blast furnace according to claim 1 and 2, it is characterized in that: when the gas temperature that described gravitational precipitator comes out surpasses or be lower than the temperature that sack cleaner allows, by the regulating and controlling valving, coal gas partly or entirely enters gas change heater, cool the temperature to below 280 ℃ or rise to more than 80 ℃ after enter bag-type dust removal system and carry out smart dedusting.
4, dry-type process for dusting gas of blast furnace according to claim 3 is characterized in that: described gas temperature interchanger is divided into two to three groups, imports and exports on the pipe for every group and sets up reliable shut-off device.
5, dry-type process for dusting gas of blast furnace according to claim 1 and 2, it is characterized in that: when single subsystem equipment, pipe network and the annex of described bag-type dust removal system breaks down, close this fault subsystem in this dust-removal system by cutting-off valve, realize the off-line maintenance of this dedusting subsystem.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610031121A CN100588720C (en) | 2006-01-01 | 2006-01-01 | Gas totally-drying purifying dust-collecting process of blast-furnace |
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|---|---|---|---|
| CN200610031121A CN100588720C (en) | 2006-01-01 | 2006-01-01 | Gas totally-drying purifying dust-collecting process of blast-furnace |
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| CN1818080A true CN1818080A (en) | 2006-08-16 |
| CN100588720C CN100588720C (en) | 2010-02-10 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871028A (en) * | 2009-12-30 | 2010-10-27 | 中冶南方工程技术有限公司 | Blast furnace top pressure control system adopting gas dry method dust-removing device |
| 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 |
| DE212009000108U1 (en) | 2008-09-26 | 2012-02-02 | Siemens Vai Metals Technologies Gmbh | Device for the dry cleaning of gas produced during pig iron / iron production |
| CN101457159B (en) * | 2009-01-09 | 2012-05-23 | 唐山科源环保技术装备有限公司 | Gas purification and cooling process of two stage type gas generating furnace |
| CN102703628A (en) * | 2012-06-13 | 2012-10-03 | 北京首钢国际工程技术有限公司 | Use method for circulating comprehensive utilization device for blast furnace gas |
| CN102978315A (en) * | 2012-11-14 | 2013-03-20 | 河北省首钢迁安钢铁有限责任公司 | Dry method dedusting air supply method and dry method dedtusting air supply system |
| CN102985567A (en) * | 2010-05-20 | 2013-03-20 | 西门子Vai金属科技有限责任公司 | Method and device for regulating the temperature of process gases from plants for raw iron production for use in an expansion turbine |
| CN103305645A (en) * | 2013-07-11 | 2013-09-18 | 重庆钢铁(集团)有限责任公司 | Blast furnace gas purification system |
| CN104004550A (en) * | 2014-05-21 | 2014-08-27 | 河南龙成煤高效技术应用有限公司 | Purification and dust removal system of dusty coal gas and process method of purification and dust removal system |
| CN108559814A (en) * | 2018-07-05 | 2018-09-21 | 安徽顺达环保科技股份有限公司 | A kind of dedusting of blast furnace gas technique |
-
2006
- 2006-01-01 CN CN200610031121A patent/CN100588720C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE212009000108U1 (en) | 2008-09-26 | 2012-02-02 | Siemens Vai Metals Technologies Gmbh | Device for the dry cleaning of gas produced during pig iron / iron production |
| 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 |
| CN101457159B (en) * | 2009-01-09 | 2012-05-23 | 唐山科源环保技术装备有限公司 | Gas purification and cooling process of two stage type gas generating furnace |
| CN101871028B (en) * | 2009-12-30 | 2012-05-23 | 中冶南方工程技术有限公司 | Blast furnace top pressure control system adopting gas dry method dust-removing device |
| CN101871028A (en) * | 2009-12-30 | 2010-10-27 | 中冶南方工程技术有限公司 | Blast furnace top pressure control system adopting gas dry method dust-removing device |
| CN102985567B (en) * | 2010-05-20 | 2015-01-07 | 西门子Vai金属科技有限责任公司 | Method and device for regulating the temperature of process gases from plants for raw iron production for use in an expansion turbine |
| CN102985567A (en) * | 2010-05-20 | 2013-03-20 | 西门子Vai金属科技有限责任公司 | Method and device for regulating the temperature of process gases from plants for raw iron production for use in an expansion turbine |
| CN102703628A (en) * | 2012-06-13 | 2012-10-03 | 北京首钢国际工程技术有限公司 | Use method for circulating comprehensive utilization device for blast furnace gas |
| CN102978315A (en) * | 2012-11-14 | 2013-03-20 | 河北省首钢迁安钢铁有限责任公司 | Dry method dedusting air supply method and dry method dedtusting air supply system |
| CN103305645A (en) * | 2013-07-11 | 2013-09-18 | 重庆钢铁(集团)有限责任公司 | Blast furnace gas purification system |
| CN103305645B (en) * | 2013-07-11 | 2015-10-14 | 重庆钢铁(集团)有限责任公司 | Blast furnace coal gas purification system |
| CN104004550A (en) * | 2014-05-21 | 2014-08-27 | 河南龙成煤高效技术应用有限公司 | Purification and dust removal system of dusty coal gas and process method of purification and dust removal system |
| CN108559814A (en) * | 2018-07-05 | 2018-09-21 | 安徽顺达环保科技股份有限公司 | A kind of dedusting of blast furnace gas technique |
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| Publication number | Publication date |
|---|---|
| CN100588720C (en) | 2010-02-10 |
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