CN105256091A - Dry dedusting technology for blast furnace gas - Google Patents
Dry dedusting technology for blast furnace gas Download PDFInfo
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- CN105256091A CN105256091A CN201510721216.1A CN201510721216A CN105256091A CN 105256091 A CN105256091 A CN 105256091A CN 201510721216 A CN201510721216 A CN 201510721216A CN 105256091 A CN105256091 A CN 105256091A
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- blast furnace
- furnace gas
- dedusting
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- dust
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Blast Furnaces (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention provides a dry dedusting technology for blast furnace gas. The technology includes the following steps that firstly, the blast furnace gas is conveyed to a gravity dust remover so that rough dedusting can be performed on the blast furnace gas; secondly, the blast furnace gas subjected to rough dedusting is conveyed into a moisture absorbing device, and dehumidification is performed on the blast furnace gas; thirdly, the temperature of the blast furnace gas subjected to dehumidification is controlled to 100-250 DEG C through a temperature controller; and fourthly, the blast furnace gas subjected to dehumidification is conveyed to a cloth bag dust remover so that dedusting can be performed furthermore, removed dust is conveyed into a dust storage tank to be stored and collected, the blast furnace gas subjected to dedusting enters a pressure reduction valve set through a gas pipeline to be subjected to pressure reduction, power generation is performed through a blast furnace gas overbottom pressure turbine power generation device, and the blast furnace gas subjected to depressurization is conveyed into a gas pipe network to be cyclically used. Moisture absorbing, dehumidification, temperature raising and heating are added to all the processes according to the possible low-temperature blast furnace gas condition, the dry dedusting efficiency of the blast furnace gas is guaranteed, the dedusting effect is good, the amount of consumed water is small, and the technology is environment-friendly.
Description
Technical field
The present invention relates to a kind of blast furnace gas dry dusting technique.
Background technology
Along with the development of Iron And Steel Industry, newly-built medium and small blast furnace generally adopts blast furnace gas dry dusting; Some large blast furnaces are newly-built or extend the trend also having and adopt blast furnace gas dry dusting.Compared with wet dedusting, blast furnace gas dry dusting not only simplify process system, fundamentally solves the process problem of secondarily polluted water and mud, the good result of certain gas recovery physical thermal, water saving, economize on electricity.And coordinate dry type TRT can Appropriate application gas heat, significantly improve power generation level.Country also explicit order supports the technological line of these energy-saving and emission-reduction, environmental protection.
Traditional On Bf Gas Purifying System is made up of gravitational precipitator and secondary Wen washing tower, Wen's washing tower is wet scrubbing, need the water treatment system of large water gaging and more complicated, and current full dry cloth-bag dusting adopts bag-type dust exactly, do not wash with water, save a large amount of water resourcess.
But what can not be ignored is that blast furnace gas dry dusting takes up an area greatly, high, the effective working temperature interval of maintenance cost is narrow, purification coal gas weak effect, TRT fan blade wear and tear, vibration equipment is large, brings disaster to the outstanding drawbacks such as all users.The operation of blast furnace is difficult to management the processing requirement meeting gas purification.
To this, the following patent documentation of current domestic main existence:
Patent publication No.: CN101260322, discloses a kind of blast furnace gas drying bag dust removing device and technique, belongs to metallurgical environmental protection dedusting technology field.Primarily of dust removal and filtration, deashing, dust unloading and conveying, automatically control, the device such as gas diffuses and large filtration velocity, nitrogen or purified gas pulse backblowing deashing, pneumatic unload defeated ash and nitrogen and purified gas each other the technique such as subsequent use form.By sock filtration, purification coal gas, utilize nitrogen or purified gas air pulse reverse gas cleaning, the resistance of fly-ash separator is controlled with this, making filter bag have optimal dust removing effects, is the dry method dust purification system that a kind of efficiency of dust collection is high, purified gas dustiness is low, dust-removal system energy consumption is low, purified gas thermo-efficiency is high, level of automation is high; Adopt over-long specification filter bag and biserial pulse cleaning system, meet the requirement of dust-removal system to the excellent blowback effect of large filtering surface sum; Increase raw gas diffusion valve group, guarantee that the coal gas of temperature exceeding standard does not enter dust collector box body, protect cloth bag, effectively control blast furnace top pressure, make system cloud gray model safer; Achieve omnidistance anhydrous operation, effectively prevent the possibility of the moisture paste filter bag of coal gas dust, have the advantages that floor space is few, technical process is short, deashing ability is strong, equipment is simple, labour intensity is low.But this patent is mainly applicable to the dedusting of blast furnace gas process of high temperature, as run into low temperature blast furnace gas or the unaccommodated blast furnace gas of temperature, then dust removing effects can be affected.
Summary of the invention
For solving above-mentioned Problems existing, the object of the present invention is to provide a kind of blast furnace gas dry dusting technique, described technique is for the situation of the low temperature blast furnace gas likely occurred, set up moisture absorption dehumidifying and intensification heat treated, ensure the dry method dust efficiency of blast furnace gas, good dedusting effect, water loss is low, environmentally friendly.
For achieving the above object, technical scheme of the present invention is:
A kind of blast furnace gas dry dusting technique, comprises the steps:
1) blast furnace gas produced by blast-furnace roasting to gravitational precipitator, carries out the thick dedusting to blast furnace gas through gas pipeline transportation service;
2) blast furnace gas after thick dedusting is sent into moisture absorption apparatus, establish in described moisture absorption apparatus except wet layer, dehumidification treatments is carried out to blast furnace gas;
3) by temperature regulator, the blast furnace gas temperature after dehumidification treatments is controlled at 100 ~ 250 DEG C;
4) the further dedusting of sack cleaner is sent into, the dust of removing sends into dust storage tank store collected, blast furnace gas after dedusting enters reducer unit through gas line and reduces pressure, and generated electricity by blast-furnace top gas recovery turbine generator, post-decompression blast furnace gas is sent into gaspipe network and is recycled.
Further, step 1) described furnace volume is 800 ~ 1000m
3.
Separately, step 2) described in the laying by moisture adsorbent except in wet layer of moisture absorption apparatus.
Separately have, step 2) described in moisture adsorbent be selected from one in silica gel, aluminum oxide, molecular sieve, calcium oxide and calcium chloride.
Again, step 3) described in blast furnace gas temperature control at 160 ~ 240 DEG C.
Further, step 4) described in sack cleaner dust-removal cloth-bag used be fiberglass needled mat dedusting filtering bag.
And, step 4) described in establish the spray equipment suppressing airborne dust for spraying tap water in dust storage tank, this spray equipment water loss every day is 3 ~ 4t.
Beneficial effect of the present invention is:
Described technique increases dehydrating unit, ensures efficiency of dust collection; Water loss is low, and every day, water loss was 3 ~ 4t, only bottom sack cleaner, arranged spray equipment, prevented airborne dust, protection of the environment; Sack cleaner adopts special glass fiber needled felt dedusting filtering bag, adapts to the dry method dust process under hot environment.
Embodiment
Following examples for illustration of the present invention, but can not be used for limiting the scope of the invention.The implementation condition adopted in embodiment can be for further adjustments according to the condition of producer, and unaccounted implementation condition is generally conventional laboratory conditions.
A kind of blast furnace gas dry dusting technique provided by the present invention, comprises the steps:
1) blast furnace gas produced by blast-furnace roasting to gravitational precipitator, carries out the thick dedusting to blast furnace gas through gas pipeline transportation service;
2) blast furnace gas after thick dedusting is sent into moisture absorption apparatus, establish in described moisture absorption apparatus except wet layer, dehumidification treatments is carried out to blast furnace gas;
3) by temperature regulator, the blast furnace gas temperature after dehumidification treatments is controlled at 100 ~ 250 DEG C;
4) the further dedusting of sack cleaner is sent into, the dust of removing sends into dust storage tank store collected, blast furnace gas after dedusting enters reducer unit through gas line and reduces pressure, and generated electricity by blast-furnace top gas recovery turbine generator, post-decompression blast furnace gas is sent into gaspipe network and is recycled.
Further, step 1) described furnace volume is 800 ~ 1000m
3.
Separately, step 2) described in the laying by moisture adsorbent except in wet layer of moisture absorption apparatus.
Separately have, step 2) described in moisture adsorbent be selected from one in silica gel, aluminum oxide, molecular sieve, calcium oxide and calcium chloride.
Again, step 3) described in blast furnace gas temperature control at 160 ~ 240 DEG C.
Further, step 4) described in sack cleaner dust-removal cloth-bag used be fiberglass needled mat dedusting filtering bag.
And, step 4) described in establish the spray equipment suppressing airborne dust for spraying tap water in dust storage tank, this spray equipment water loss every day is 3 ~ 4t.
A kind of blast furnace gas dry dusting technique provided by the present invention, increases dehydrating unit, ensures efficiency of dust collection; Water loss is low, and every day, water loss was 3 ~ 4t, only bottom sack cleaner, arranged spray equipment, prevented airborne dust, protection of the environment; Sack cleaner adopts special glass fiber needled felt dedusting filtering bag, adapts to the dry method dust process under hot environment.
It should be noted that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted.Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to the technical scheme of invention or equivalent replacement, and not depart from the scope of technical solution of the present invention, it all should be encompassed in right of the present invention.
Claims (7)
1. a blast furnace gas dry dusting technique, is characterized in that, comprises the steps:
The blast furnace gas produced by blast-furnace roasting to gravitational precipitator, carries out the thick dedusting to blast furnace gas through gas pipeline transportation service;
Blast furnace gas after thick dedusting is sent into moisture absorption apparatus, establishes in described moisture absorption apparatus except wet layer, dehumidification treatments is carried out to blast furnace gas;
By temperature regulator, the blast furnace gas temperature after dehumidification treatments is controlled at 100 ~ 250 DEG C;
Send into the further dedusting of sack cleaner, the dust of removing sends into dust storage tank store collected, blast furnace gas after dedusting enters reducer unit through gas line and reduces pressure, and generated electricity by blast-furnace top gas recovery turbine generator, post-decompression blast furnace gas is sent into gaspipe network and is recycled.
2., according to a kind of blast furnace gas dry dusting technique described in claim 1, it is characterized in that, step 1) described furnace volume is 800 ~ 1000m
3.
3. a kind of blast furnace gas dry dusting technique according to claim 1, is characterized in that, step 2) described in the laying by moisture adsorbent except in wet layer of moisture absorption apparatus.
4. a kind of blast furnace gas dry dusting technique according to claim 3, is characterized in that, step 2) described in moisture adsorbent be selected from one in silica gel, aluminum oxide, molecular sieve, calcium oxide and calcium chloride.
5. a kind of blast furnace gas dry dusting technique according to claim 1, is characterized in that, it is characterized in that, step 3) described in blast furnace gas temperature control at 160 ~ 240 DEG C.
6. a kind of blast furnace gas dry dusting technique according to claim 1, is characterized in that, it is characterized in that, step 4) described in sack cleaner dust-removal cloth-bag used be fiberglass needled mat dedusting filtering bag.
7. a kind of blast furnace gas dry dusting technique according to claim 1, is characterized in that, it is characterized in that, step 4) described in establish the spray equipment suppressing airborne dust for spraying tap water in dust storage tank, this spray equipment water loss every day is 3 ~ 4t.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510721216.1A CN105256091A (en) | 2015-10-30 | 2015-10-30 | Dry dedusting technology for blast furnace gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510721216.1A CN105256091A (en) | 2015-10-30 | 2015-10-30 | Dry dedusting technology for blast furnace gas |
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| CN105256091A true CN105256091A (en) | 2016-01-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109439827A (en) * | 2018-12-06 | 2019-03-08 | 东北大学 | A kind of blast furnace raw gas heats up dust pelletizing system online |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476007A (en) * | 2008-11-18 | 2009-07-08 | 无锡红旗除尘设备有限公司 | Dry dust collection method and apparatus for blast furnace gas |
| CN202081121U (en) * | 2011-05-27 | 2011-12-21 | 中冶赛迪工程技术股份有限公司 | Blast-furnace gas dust collecting device by using dry method |
| CN102534082A (en) * | 2012-02-29 | 2012-07-04 | 中冶赛迪工程技术股份有限公司 | Dry-process dust-removing and dechlorination combined device for blast furnace gas |
| CN202465751U (en) * | 2012-02-29 | 2012-10-03 | 中冶赛迪工程技术股份有限公司 | Dry dust-removing and dechlorinating composite device for blast furnace coal gas |
-
2015
- 2015-10-30 CN CN201510721216.1A patent/CN105256091A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476007A (en) * | 2008-11-18 | 2009-07-08 | 无锡红旗除尘设备有限公司 | Dry dust collection method and apparatus for blast furnace gas |
| CN202081121U (en) * | 2011-05-27 | 2011-12-21 | 中冶赛迪工程技术股份有限公司 | Blast-furnace gas dust collecting device by using dry method |
| CN102534082A (en) * | 2012-02-29 | 2012-07-04 | 中冶赛迪工程技术股份有限公司 | Dry-process dust-removing and dechlorination combined device for blast furnace gas |
| CN202465751U (en) * | 2012-02-29 | 2012-10-03 | 中冶赛迪工程技术股份有限公司 | Dry dust-removing and dechlorinating composite device for blast furnace coal gas |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109439827A (en) * | 2018-12-06 | 2019-03-08 | 东北大学 | A kind of blast furnace raw gas heats up dust pelletizing system online |
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Application publication date: 20160120 |