CN105463153A - Purification and recovery system and method for converter flue gas - Google Patents
Purification and recovery system and method for converter flue gas Download PDFInfo
- Publication number
- CN105463153A CN105463153A CN201511000617.4A CN201511000617A CN105463153A CN 105463153 A CN105463153 A CN 105463153A CN 201511000617 A CN201511000617 A CN 201511000617A CN 105463153 A CN105463153 A CN 105463153A
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- CN
- China
- Prior art keywords
- gas
- air filter
- converter
- flue gas
- purification
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention provides a purification and recovery system and method for converter flue gas. The purification and recovery system comprises a flue gas cooling system, a venturi tube dedusting system, a draught fan system, a coal gas component analysis system, an air filter, a switch valve, a filter washing device, a filter pollution discharge device, a pressure measurement device and the like. According to the purification and recovery system and method, the flue gas cooling system, the venturi tube dedusting system, the draught fan system and a coal gas component analysis device are the system process generally used for existing mini-medium converters. The air filter, the switch valve, the filter washing device, the filter pollution discharge device, the pressure measurement device and other added devices are simple in structure, easy to manufacture and good in purification effect. The atmospheric pollutant emission concentration of the converter flue gas can be effectively lowered, and the purification and recovery system and method are specifically suitable for being used for technology improvement of wet type flue gas purification and recovery systems of the backward mini-medium converters.
Description
Technical field
The invention belongs to the technical field of converter gas purification and recovery, particularly relate to a kind of converter gas purification recovery system and method.
Background technology
With China's whole society's showing great attention to atmospheric environment problem in recent years, Iron And Steel Industry is put into the key monitoring object that atmospheric polluting material controls.Converter produces the high-temperature flue gas being rich in CO in a large number when oxygen blast is smelted, traditional mini-medium BOF plants gas cleaning recovery system adopts the processing mode of wet flue gas cooling and Venturi meter dedusting usually, exhaust gas dust content is after treatment still very high, the smoke stack emission requirement of country " Steel industry atmosphere pollutants emission standards " (GB28664-2012) cannot be met, therefore be necessary on the basis of conventional wet Venturi meter dust-removal system, develop a kind of less investment, change little novel converter gas cleaning recovery system, with the requirement of satisfied national Steel industry atmosphere pollutants emission standards.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned Problems existing, provides a kind of converter gas purification recovery system and method, effectively reduces converter gas Air Pollutant Emission concentration.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of converter gas purification recovery system, comprises flue-gas-cooling system, Venturi meter dust-removal system, blower fan system, gas composition analytical equipment, air filter, switch valve, strainer flushing, blowdown and pressure tester.It is characterized in that: converter gas, after cooling and Venturi meter dust-removal system, needed again to filter smart dedusting by air filter before blower fan is disposed to air.
By such scheme, the internal core of described air filter adopts flushable web material, modular design, easily changes; Outer hull is also provided with automatic explosion venting valve and coal gas blow device.
By such scheme, described switch valve interlocked control.
A kind of converter gas purification recovery method, it is characterized in that, comprise the steps: that Converter Oxigen Blowing is smelted the flue gas produced and first undertaken lowering the temperature and dedusting by flue gas cooling and Venturi meter dust-removal system, flue-gas temperature is down to less than 70 DEG C, in flue gas, dust is removed by major part through water washing and gravity settling simultaneously.
When in converter gas, gas composition does not reach certain standard, when needing to be diffused to outside atmosphere by chimney, switch valve is opened into and diffuses side, converter gas after overcooling and Venturi meter dedusting, enter air filter smart dedusting again by blower fan pressurization, after meeting atmosphere pollutants emission standards, be disposed to atmospheric air chamber external environment.
When in converter gas, gas composition reaches certain standard, when can enter gas chamber storage, switch valve is opened into and reclaims side, the converter gas after overcooling and Venturi meter dedusting, and being pressurizeed by blower fan directly enters gas chamber storage and comprehensive utilization.
When switch valve is opened into recovery side, electronic or the operated pneumatic valve that described strainer flushing pipe is worn is opened automatically, described air filter is rinsed and blowdown, flushing and sewage draining valve are opened certain hour (1 ~ 2min) and are automatically closed afterwards, terminate the flushing to filtering element for air filter and blowdown work.
After described system uses for some time, when there is warning or equipment stop production to overhaul in pressure tester, electronic or the operated pneumatic valve that steaming out pipeline is worn is opened, the converter gas remaining to air filter housing inside purges, after residual without coal gas in confirmation housing, air filter inside can be entered and carry out filter core maintenance and more change jobs.
The invention has the beneficial effects as follows: a kind of converter gas purification recovery system and method are provided, by twice dust removal process of Venturi meter cleaning apparatus and air filter, effectively reduce converter gas Air Pollutant Emission concentration.
Accompanying drawing explanation
Fig. 1 is the structural representation of one embodiment of the invention.
Wherein: 1-converter, 2-gasification cooling flue, 3-overflow sizing Venturi meter, 4-gravity dewatering apparatus, 5-RD is adjustable Venturi meter, 6-90 ° of elbow separator, 7-is wet revolves water trap, 8-blower fan, 9-gas composition analytical equipment, 10-air filter, 11-diffusing chimney, 12-gas chamber, 13-first Pneumatic butterfly valve, 14-second Pneumatic butterfly valve, 15-the 3rd Pneumatic butterfly valve, 16-the 4th Pneumatic butterfly valve, 17-the 5th Pneumatic butterfly valve, 18-explosion venting device, 19-water lute drainer, electronic or the Pneumatic butterfly valve of 20-, electronic or the pneumatic ball valve of 21-, 22-pressure measurement and warning device, 23-steaming out pipeline, 24-strainer flushing pipe, 25-RD is adjustable Venturi meter water supply line, 26-overflow sizing Venturi meter water supply line, 27-recirculated water drainage pipeline, 28-strainer blow-off line, 29-strainer coal gas diffusion pipe.
Embodiment
For understanding the present invention better, below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, embodiment of the present invention flue-gas-cooling system comprises gasification cooling flue 2, overflow sizing Venturi meter 3, gravity dewatering apparatus 4; Venturi meter dust-removal system comprises the adjustable Venturi meter of RD 5,90 ° of elbow separators 6, wets and revolve water trap 7; Switch valve comprises Pneumatic butterfly valve 13 ~ 17; Strainer flushing arrangement comprises strainer flushing pipe 24, electric butterfly valve 20; Strainer blowdown apparatus comprises water lute drainer 19, strainer blow-off line 28.
Converter 1 produces high-temperature dust-containing flue gas flue-gas temperature after flue-gas-cooling system equipment 2,3,4 and Venturi meter dust-removal system equipment 5,6,7 process and is cooled to less than about 70 DEG C when oxygen blast is smelted; In flue gas most of grit and water smoke separated, and to be discharged by water lute drainer 19 by recirculated water draining.
Converter gas after flue-gas-cooling system and the process of Venturi meter dust-removal system through gas fan 8 pressurize after enter gas chamber 12 store or by diffusing chimney 11 ignition bleeding to outside atmosphere environment.
When gas composition analytical equipment 9 records that in flue gas, gas composition does not meet recovery standard, switch valve 13,15,16 is opened, switch valve 14,17 is closed, and flue gas enters outside atmosphere environment through diffusing chimney 11 after again filtering smart dedusting by air filter 10.
When gas composition analytical equipment 9 record gas composition in flue gas meet recovery standard time, switch valve 13,15,16 close, switch valve 14,17 open, flue gas enters gas chamber 12 and stores.Simultaneously set on strainer flushing pipe 24 electronic or Pneumatic butterfly valve 20 is opened, air filter 10 is rinsed, the dust that air filter traps drains into recirculated water drainage pipeline 27 by wash-down water through water lute drainer 19 and strainer blow-off line 28, is forced into recirculated water water-supply pipe again and recycles after the process of circulation water station.Electronic or Pneumatic butterfly valve 20 is opened for some time (1 ~ 2min) and is automatically closed afterwards, terminates the flushing to air filter 10.
When air filter blocks, pressure measurement and warning device 22 are reported to the police, or equipment stop production need maintenance time, switch valve 13,15 is closed, electronic or pneumatic ball valve 21 set on steaming out pipeline 23 is opened, on strainer coal gas diffusion pipe 29, the stopcock of configuration is opened simultaneously, converter gas remaining in air filter 10 is purged, there is gas poisoning when preventing maintainer from entering air filter, to purge steam and the remaining converter gas of strainer drains into outdoor by coal gas diffusion pipe 29.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. a converter gas purification recovery system, comprise flue-gas-cooling system, Venturi meter dust-removal system, blower fan system, gas composition analytical equipment, air filter, switch valve, strainer flushing, blowdown and pressure tester, it is characterized in that: converter gas, after cooling and Venturi meter dust-removal system, needed again to filter smart dedusting by air filter before blower fan is disposed to air.
2. a kind of converter gas purification recovery system according to claim 1, is characterized in that, the internal core of described air filter adopts flushable material, modular design, easily changes; Outer hull is also provided with automatic explosion venting valve and coal gas blow device.
3. a converter gas purification recovery method, it is characterized in that, comprise the steps: that Converter Oxigen Blowing is smelted the flue gas produced and first undertaken lowering the temperature and dedusting by flue gas cooling and Venturi meter dust-removal system, flue-gas temperature is down to less than 70 DEG C, in flue gas, dust is removed by major part through water washing and gravity settling simultaneously.
When in converter gas, gas composition does not reach certain standard, when needing to be diffused to outside atmosphere by chimney, switch valve is opened into and diffuses side, converter gas after overcooling and Venturi meter dedusting, enter air filter smart dedusting again by blower fan pressurization, after meeting atmosphere pollutants emission standards, be disposed to atmospheric air chamber external environment.
When in converter gas, gas composition reaches certain standard, when can enter gas chamber storage, switch valve is opened into and reclaims side, the converter gas after overcooling and Venturi meter dedusting, and being pressurizeed by blower fan directly enters gas chamber storage and comprehensive utilization.
When switch valve is opened into recovery side, electronic or the operated pneumatic valve that described strainer flushing pipe is worn is opened automatically, described air filter is rinsed and blowdown, flushing and sewage draining valve are opened certain hour (1 ~ 2min) and are automatically closed afterwards, terminate the flushing to filtering element for air filter and blowdown work.
After described system uses for some time, when there is warning or equipment stop production to overhaul in pressure tester, electronic or the operated pneumatic valve that steaming out pipeline is worn is opened, the converter gas remaining to air filter housing inside purges, after residual without coal gas in confirmation housing, air filter inside can be entered and carry out filter core maintenance and more change jobs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511000617.4A CN105463153B (en) | 2015-12-25 | 2015-12-25 | A kind of converter gas purification recovery system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511000617.4A CN105463153B (en) | 2015-12-25 | 2015-12-25 | A kind of converter gas purification recovery system and method |
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| CN105463153A true CN105463153A (en) | 2016-04-06 |
| CN105463153B CN105463153B (en) | 2018-04-17 |
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| CN201511000617.4A Active CN105463153B (en) | 2015-12-25 | 2015-12-25 | A kind of converter gas purification recovery system and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338029A (en) * | 2018-11-07 | 2019-02-15 | 武汉科技大学 | A kind of gas flow adjusting means and deduster and dust pelletizing system |
| CN109490560A (en) * | 2018-12-27 | 2019-03-19 | 远光智和卓源(北京)科技有限公司 | A kind of coal sample automatic checkout system and method |
| CN110241284A (en) * | 2019-07-24 | 2019-09-17 | 马鞍山钢铁股份有限公司 | A kind of flue gas particles of steelmaking converter purification system and purification method again |
| CN110448976A (en) * | 2019-09-04 | 2019-11-15 | 中冶东方工程技术有限公司 | One kind disappears white purifying integration device |
| CN110935263A (en) * | 2019-12-18 | 2020-03-31 | 钢城集团凉山瑞海实业有限公司 | Dry dedusting and spraying purification process for converter flue gas |
| CN115143794A (en) * | 2022-06-14 | 2022-10-04 | 成都易态科技有限公司 | Flue gas filtering and dust removing equipment and filter element regeneration method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101705330A (en) * | 2009-11-23 | 2010-05-12 | 赵本军 | Method for purifying smoke of steel converter and recovering residual heat |
| CN201997193U (en) * | 2011-03-07 | 2011-10-05 | 山东雪花生物化工股份有限公司 | Air filtering device |
| CN202465758U (en) * | 2011-12-02 | 2012-10-03 | 中冶赛迪工程技术股份有限公司 | Converter gas purifying and recycling system |
| CN104962681A (en) * | 2015-06-26 | 2015-10-07 | 汤海军 | Waste-heat-recovery converter dry-method dust removal process |
-
2015
- 2015-12-25 CN CN201511000617.4A patent/CN105463153B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101705330A (en) * | 2009-11-23 | 2010-05-12 | 赵本军 | Method for purifying smoke of steel converter and recovering residual heat |
| CN201997193U (en) * | 2011-03-07 | 2011-10-05 | 山东雪花生物化工股份有限公司 | Air filtering device |
| CN202465758U (en) * | 2011-12-02 | 2012-10-03 | 中冶赛迪工程技术股份有限公司 | Converter gas purifying and recycling system |
| CN104962681A (en) * | 2015-06-26 | 2015-10-07 | 汤海军 | Waste-heat-recovery converter dry-method dust removal process |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338029A (en) * | 2018-11-07 | 2019-02-15 | 武汉科技大学 | A kind of gas flow adjusting means and deduster and dust pelletizing system |
| CN109490560A (en) * | 2018-12-27 | 2019-03-19 | 远光智和卓源(北京)科技有限公司 | A kind of coal sample automatic checkout system and method |
| CN110241284A (en) * | 2019-07-24 | 2019-09-17 | 马鞍山钢铁股份有限公司 | A kind of flue gas particles of steelmaking converter purification system and purification method again |
| CN110448976A (en) * | 2019-09-04 | 2019-11-15 | 中冶东方工程技术有限公司 | One kind disappears white purifying integration device |
| CN110935263A (en) * | 2019-12-18 | 2020-03-31 | 钢城集团凉山瑞海实业有限公司 | Dry dedusting and spraying purification process for converter flue gas |
| CN115143794A (en) * | 2022-06-14 | 2022-10-04 | 成都易态科技有限公司 | Flue gas filtering and dust removing equipment and filter element regeneration method thereof |
| CN115143794B (en) * | 2022-06-14 | 2024-08-02 | 成都易态科技有限公司 | Flue gas filtering and dust removing equipment and filter element regeneration method thereof |
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| Publication number | Publication date |
|---|---|
| CN105463153B (en) | 2018-04-17 |
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