CN107385130A - A kind of blast furnace gas purification technique - Google Patents
A kind of blast furnace gas purification technique Download PDFInfo
- Publication number
- CN107385130A CN107385130A CN201710579863.2A CN201710579863A CN107385130A CN 107385130 A CN107385130 A CN 107385130A CN 201710579863 A CN201710579863 A CN 201710579863A CN 107385130 A CN107385130 A CN 107385130A
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- China
- Prior art keywords
- blast furnace
- gas
- cyclone dust
- dust collectors
- coal gas
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/002—Evacuating and treating of exhaust gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/22—Dust arresters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
- Cyclones (AREA)
Abstract
The invention provides a kind of blast furnace gas purification technique, its technological process is：The coal gas of blast furnace roof discharge is changed into the purified gas of one-level half after the rough dedusting of gravitational precipitator, the purified gas of one-level half is changed into the purified gas of two level half after the two level rough dedusting of cyclone dust collectors, the purified gas of two level half is changed into clean coal gas after sack cleaner refined dedusting, the clean coal gas that clean coal gas is changed into low-temp low-pressure after blast-furnace top gas recovery turbine generating equipment (TRT) generating enters gaspipe network for users to use, electricity by power network for users to use, if TRT equipment is not run, clean coal gas then becomes low pressure by reducer unit, the clean coal gas of low temperature enters gaspipe network for users to use.The present invention further separates the solid particle of small diameter by increasing cyclone dust collectors before sack cleaner, can so greatly reduce the load of blast furnace gas cloth bag dedusting, so as to extend coal gas waste pressure turbine generating equipment service life.
Description
Technical field
The present invention relates to one kind to be used for gas purification process in blast furnace in metallurgical industry ironmaking processes.
Background technology
Most of China's dedusting of blast furnace gas technique first passes through gravitational dust collection at present, by big particulate matter in gravitational precipitator
Middle removal, then uses dry-method bag-type dust collecting again, and little particle is removed in cloth bag.But the coal gas of dry method dust processing is directly logical
Two problems are found when crossing coal gas waste pressure turbine power generation, one is easy fouling on blade, and one is turbine leaf
Piece is often worn out, and the vibration increase of operation a period of time, influences unit operation.
Patent 200710168882.2,《A kind of blast furnace gas cloth bag dedusting process》, using dry-method bag-type dust collecting technique come
Realize the purification to blast furnace gas.Patent 201510721216.1,《A kind of blast furnace gas dry dusting technique》, first to blast furnace coal
Gas carries out gravitational dust collection and dehumidification treatments are then fed into the further dedusting of cloth bag.Patent 201611154112.8,《A kind of blast furnace coal
Air drying purification method and system》, mainly blast furnace gas is removed using dry method rough dedusting device and dry method refined dedusting device
Dirt.
Existing patent substantially carries out dust removal process, so meeting using gravitational dust collection, bag-type dust etc. to blast furnace gas
Coal gas waste pressure turbine generating equipment service life is caused to reduce.
The present invention designs a kind of blast furnace gas purification technique, is mainly removed by gravitational dust collection, cyclone dust removal and cloth bag
Dirt purifies to blast furnace gas.
The content of the invention
The situation that the present invention effectively can not remove part fine particle for existing dedusting technology, there is provided Yi Zhongxin
Type Purify Process of Blast Furnace, increases cyclone dust collectors before sack cleaner, further separates the solid particle of small diameter,
Greatly reduce the load of blast furnace gas cloth bag dedusting, so as to extend coal gas waste pressure turbine generating equipment service life.
To achieve these goals, technological process of the invention is：
The coal gas of blast furnace (1) furnace roof discharge is changed into the purified gas of one-level half, one-level after the rough dedusting of gravitational precipitator (2)
Half purified gas is changed into the purified gas of two level half after the two level rough dedusting of cyclone dust collectors (5), if one of cyclone dust removal
When ash bucket (4) interior controlling level of device (5) reaches certain value, then automatically switch to another cyclone dust collectors (5) and work on,
The purified gas of two level half is changed into clean coal gas after sack cleaner (9) refined dedusting, if the pressure of sack cleaner (9) upstream and downstream
When difference reaches certain value, then automatically switch to another tablecloth bag dust collector (9) and work on, clean coal gas passes through coal gas overbottom pressure
Turbine power generation equipment (TRT) is changed into low-temp low-pressure clean coal gas after generating electricity enters gaspipe network for users to use, and electricity passes through electricity
Net for users to use, if TRT equipment (6) is not run, clean coal gas then by reducer unit (7) become low pressure, low temperature it is dry
Purified gas enters gaspipe network for users to use.
The advantage of the invention is that：1) two level rough dedusting is carried out to blast furnace gas by cyclone dust collectors, further separation
The solid particle of small diameter, greatly reduce the load of blast furnace gas cloth bag dedusting, there is certain protection to sack cleaner
Effect.2) fouling and abrasion of coal gas waste pressure turbine generating equipment blade can be reduced, extends coal gas waste pressure turbine generating equipment
Service life, maintenance of equipment expense is reduced for enterprise.3) standby cyclone dust collectors and sack cleaner, can as emergency set
To ensure that blast-furnace gas dedusting system continuously works.
Brief description of the drawings
Fig. 1 is the process chart of the present invention
Fig. 2 is the structural representation of present device
Fig. 3 is cyclone dust collectors entry grates schematic diagram of the present invention
Fig. 4 is the double entrance schematic diagrames of cyclone dust collectors of the present invention
In figure：1- blast furnaces, 2- gravitational precipitators, 3- controllers, 4- ash buckets, 5- cyclone dust collectors, 6-TRT equipment, 7- subtract
Pressure valve group, 8- Stress control tables, 9- sack cleaners, 10- motor-driven valves, 11- motor-driven valves, 12- entry grates, the double entrances of 13-
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
The present invention is a kind of blast furnace gas purification technique, mainly by blast furnace (1), gravitational precipitator (2), cyclone dust removal
Device (5), sack cleaner (9), TRT equipment (6), reducer unit (7) etc. form.Blast furnace (1) is arranged during smelting iron from furnace roof
Go out a large amount of coal gas, contain a large amount of dust in coal gas.Blast furnace gas most of bulky grain quilt after the rough dedusting of gravitational precipitator (2)
Remove, blast furnace gas is changed into the purified gas of one-level half.The purified gas of one-level half enters cyclone dust collectors (5) by pipeline, and one-level half is net
Contain small part bulky grain and most little particles, the bulky grain after the two level rough dedusting of cyclone dust collectors (5) in coal gas
It is removed with a part of little particle, the purified gas of one-level half is changed into the purified gas of two level half, if one of cyclone dust collectors (5)
When controlling level reaches certain value in ash bucket, controller (3) can then transmit controlling level signal and give motor-driven valve on pipeline (11), control
System processed controls motor-driven valve (11) on the pipeline to close, and controls motor-driven valve (11) on another pipeline to open, another whirlwind removes
Dirt device (5) is started working.The purified gas of two level half enters sack cleaner (9) by pipeline, and the purified gas of two level half also contains one
Part little particle, little particle is removed after sack cleaner (9) refined dedusting, and the purified gas of two level half is changed into clean coal gas, if
When the pressure difference of sack cleaner (9) upstream and downstream reaches certain value, Stress control table (8) can be then transmitted on sack cleaner (9)
The pressure difference value signal in downstream gives motor-driven valve on pipeline (10), and control system controls motor-driven valve (10) on the pipeline to close, and control is another
Motor-driven valve (10) is opened on one pipeline, and another tablecloth bag dust collector (9) is started working.Clean coal gas is sent out by TRT equipment (6)
Be changed into after electricity low-temp low-pressure clean coal gas enter gaspipe network for users to use, electricity by power network for users to use, if TRT
Equipment (6) is not run, and clean coal gas then becomes low pressure by reducer unit (7), the clean coal gas of low temperature supplies into gaspipe network
User uses.
Claims (10)
1. a kind of blast furnace gas purification technique, it is characterised in that its technological process is：The coal gas of blast furnace (1) furnace roof discharge
It is changed into the purified gas of one-level half after the rough dedusting of gravitational precipitator (2), the purified gas of one-level half passes through the two of cyclone dust collectors (5)
It is changed into the purified gas of two level half after level rough dedusting, if the ash bucket (4) of one of cyclone dust collectors (5) is filled, automatically switches
Worked on to another cyclone dust collectors (5), the purified gas of two level half is changed into clean coal after sack cleaner (9) refined dedusting
Gas, if after the pressure difference of sack cleaner (9) exceedes certain value, automatically switching to another tablecloth bag dust collector (9) and continuing work
Make, the clean coal gas that clean coal gas is changed into low-temp low-pressure after coal gas waste pressure turbine generating equipment (TRT) generating enters coal gas
For users to use, by power network for users to use, if TRT equipment (6) is not run, clean coal gas then passes through pressure-reducing valve to electricity to pipe network
Group (7) becomes low pressure, the clean coal gas of low temperature enters gaspipe network for users to use.
A kind of 2. blast furnace gas purification technique according to claim 1, it is characterised in that：Cyclone dust collectors (5) are pacified
Behind gravitational precipitator (2), before sack cleaner (9).
A kind of 3. blast furnace gas purification technique according to claim 1, it is characterised in that：Gravitational precipitator (2) can
For one-level rough dedusting, can also there is no gravitational precipitator (2), cyclone dust collectors (5) are directly used for rough dedusting.
A kind of 4. blast furnace gas purification technique according to claim 1, it is characterised in that：Cyclone dust collectors (5) have
Two, the using and the reserved.
A kind of 5. blast furnace gas purification technique according to claim 1, it is characterised in that：Sack cleaner (9) has
Two, the using and the reserved.
A kind of 6. blast furnace gas purification technique according to claim 1, it is characterised in that：Cyclone dust collectors (5)
Switching is according to the interior controlling level signal of ash bucket (4), and when ash bucket (4) interior controlling level reaches certain value, control system controls
Motor-driven valve (11) is automatically performed, the switching of sack cleaner (9) be according to the pressure difference of sack cleaner (9) upstream and downstream, when
When the pressure difference of sack cleaner (9) upstream and downstream reaches certain value, control system controls motor-driven valve (10) to be automatically performed.
A kind of 7. blast furnace gas purification technique according to claim 1, it is characterised in that：Cyclone dust collectors (5) can
To be made up of one, two or more cyclone tubes.
A kind of 8. blast furnace gas purification technique according to claim 1, it is characterised in that：Cyclone dust collectors (5) can
Think one group of cyclone dust collectors in series or in parallel (5) composition.
A kind of 9. blast furnace gas purification technique according to claim 1, it is characterised in that：Cyclone dust collectors (5)
Entrance can be that single entry can also be double entrances (13).
A kind of 10. blast furnace gas purification technique according to claim 1, it is characterised in that：Cyclone dust collectors (5)
Entering intraoral can use entry grates (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710579863.2A CN107385130A (en) | 2017-07-17 | 2017-07-17 | A kind of blast furnace gas purification technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710579863.2A CN107385130A (en) | 2017-07-17 | 2017-07-17 | A kind of blast furnace gas purification technique |
Publications (1)
| Publication Number | Publication Date |
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| CN107385130A true CN107385130A (en) | 2017-11-24 |
Family
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| CN201710579863.2A Pending CN107385130A (en) | 2017-07-17 | 2017-07-17 | A kind of blast furnace gas purification technique |
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| CN (1) | CN107385130A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108843419A (en) * | 2018-06-29 | 2018-11-20 | 张菊金 | A kind of Power Generation by BF Gas combustion apparatus |
| CN110484307A (en) * | 2019-08-20 | 2019-11-22 | 安徽宝天新能源科技有限公司 | A kind of blast furnace gas dechlorination, desulphurization system and technique |
| CN112831621A (en) * | 2021-01-06 | 2021-05-25 | 鞍钢股份有限公司 | Blast furnace gas cooling system and cooling control method |
| CN112831622A (en) * | 2021-01-06 | 2021-05-25 | 鞍钢股份有限公司 | Blast furnace gas cooling and dechlorinating system and method |
| CN112853015A (en) * | 2021-01-06 | 2021-05-28 | 鞍钢股份有限公司 | High-efficiency cooling system and method for blast furnace gas |
| CN114574642A (en) * | 2022-03-04 | 2022-06-03 | 中冶赛迪工程技术股份有限公司 | Gas making process and equipment for reducing solid fuel for molten iron production in blast furnace |
| CN114854458A (en) * | 2022-05-23 | 2022-08-05 | 中冶京诚工程技术有限公司 | Method for enriching and recovering zinc-rich dust in zinc-containing gas |
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| CN101200656A (en) * | 2007-11-07 | 2008-06-18 | 中冶赛迪工程技术股份有限公司 | Purifying technique for roof gas of COREX melting reducing furnace |
| CN203855595U (en) * | 2014-03-06 | 2014-10-01 | 长沙有色冶金设计研究院有限公司 | Blast-furnace gas residual pressure and waste heat utilization system |
| CN104152609A (en) * | 2014-08-20 | 2014-11-19 | 重庆赛迪工业炉有限公司 | Blast furnace slag waste heat recycling system |
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2017
- 2017-07-17 CN CN201710579863.2A patent/CN107385130A/en active Pending
Patent Citations (3)
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| CN101200656A (en) * | 2007-11-07 | 2008-06-18 | 中冶赛迪工程技术股份有限公司 | Purifying technique for roof gas of COREX melting reducing furnace |
| CN203855595U (en) * | 2014-03-06 | 2014-10-01 | 长沙有色冶金设计研究院有限公司 | Blast-furnace gas residual pressure and waste heat utilization system |
| CN104152609A (en) * | 2014-08-20 | 2014-11-19 | 重庆赛迪工业炉有限公司 | Blast furnace slag waste heat recycling system |
Non-Patent Citations (1)
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| 王亮等: "高炉煤气干法除尘系统技术改造实践", 《河南冶金》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108843419A (en) * | 2018-06-29 | 2018-11-20 | 张菊金 | A kind of Power Generation by BF Gas combustion apparatus |
| CN108843419B (en) * | 2018-06-29 | 2021-02-23 | 温州盛淼工业设计有限公司 | Blast furnace gas power generation combustion equipment |
| 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 |
| CN110484307A (en) * | 2019-08-20 | 2019-11-22 | 安徽宝天新能源科技有限公司 | A kind of blast furnace gas dechlorination, desulphurization system and technique |
| CN112831621A (en) * | 2021-01-06 | 2021-05-25 | 鞍钢股份有限公司 | Blast furnace gas cooling system and cooling control method |
| CN112831622A (en) * | 2021-01-06 | 2021-05-25 | 鞍钢股份有限公司 | Blast furnace gas cooling and dechlorinating system and method |
| CN112853015A (en) * | 2021-01-06 | 2021-05-28 | 鞍钢股份有限公司 | High-efficiency cooling system and method for blast furnace gas |
| CN114574642A (en) * | 2022-03-04 | 2022-06-03 | 中冶赛迪工程技术股份有限公司 | Gas making process and equipment for reducing solid fuel for molten iron production in blast furnace |
| CN114854458A (en) * | 2022-05-23 | 2022-08-05 | 中冶京诚工程技术有限公司 | Method for enriching and recovering zinc-rich dust in zinc-containing gas |
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Application publication date: 20171124 |
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