CN106702052A - Blast furnace top pressure-equalizing gas recovery system and method - Google Patents
Blast furnace top pressure-equalizing gas recovery system and method Download PDFInfo
- Publication number
- CN106702052A CN106702052A CN201510791186.1A CN201510791186A CN106702052A CN 106702052 A CN106702052 A CN 106702052A CN 201510791186 A CN201510791186 A CN 201510791186A CN 106702052 A CN106702052 A CN 106702052A
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- CN
- China
- Prior art keywords
- pressure
- gas
- valve
- coal
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000011084 recovery Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003034 coal gas Substances 0.000 claims abstract description 37
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 239000000428 dust Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 3
- 238000009792 diffusion process Methods 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 8
- 239000003245 coal Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 abstract 3
- 239000006185 dispersion Substances 0.000 abstract 1
- 230000009977 dual effect Effects 0.000 abstract 1
- 238000004134 energy conservation Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention provides a blast furnace top pressure-equalizing gas recovery system and a method, wherein a pressure-equalizing gas pipe is connected to the high-pressure end of a gas pipe at the front part of a pressure equalizing valve, a back pressure pipeline is additionally arranged, one end of the back pressure pipeline is connected with the gas pipe, the other end of the back pressure pipeline is connected with a clean gas main pipeline,and a recovery valve, a buffer tank, a regulating valve, a check valve and a stop valve are sequentially arranged on the back pressure pipeline. Opening a recovery valve, and allowing the gas to enter a clean gas main pipeline; when the gas pressure is balanced with the pressure of the clean gas main pipeline, closing the recovery valve, opening the relief valve and discharging the lower tank; opening a pressure equalizing valve after the discharging is finished, closing a relief valve, equalizing the pressure of the lower tank to the pressure of the top of the furnace, and starting to discharge the material into the blast furnace; recovering coal gas after discharging; when the pressure of the lower tank is balanced with the pressure of the main clean gas pipeline, the gas recovery is stopped, and the dispersion valve is opened. The invention can ensure that the dust content of the back pressure coal gas is less than 5mg/m3The coal gas is prevented from being diffused to cause environmental and noise pollution, and can be recycled, so that the dual effects of energy conservation and emission reduction are realized.
Description
Technical field
The invention belongs to smelt iron field of pipeline equipment, more particularly to a kind of recovery system for pressing coal gas for blast furnace roof and its return
Receiving method.
Background technology
Blast furnace roof feeding system, is returned by half purified gas of blast furnace roof, and after being pressed with furnace top pressure, valve material is put into blast furnace
Interior, then the coal gas under blast furnace roof in tank is discharged into air via pressure gas pipe, not only causes the dirt of environment and noise
Dye, and the significant wastage energy.
The content of the invention
The present invention provides a kind of blast furnace roof and presses gas recovery system and method, it is intended to coal-gas recovering after pressing to purified gas
In pipe network, so as to realize the purpose of energy-saving and emission-reduction.
Therefore, the technical solution that the present invention is taken is：
A kind of blast furnace roof presses the pressure gas pipe of tank under gas recovery system, including connection blast furnace roof, is connected to dry method and removes
Gas pipe and equalizing valve after dirt on coal gas main pipeline, access the anterior gas pipe high-pressure side of equalizing valve, and increase by pressure gas pipe
If back pressure pipeline, back pressure pipeline one end connection gas pipe, the other end is connected with purified gas main pipeline, is installed successively on back pressure pipeline
There are recovery valve, surge tank, regulating valve, check-valves and stop valve.
A kind of blast furnace roof presses coal-gas recovering method, and its specific removal process is：
When furnace top even pressure terminates, upper pressure tank is 220kPa, is balanced with furnace top pressure；Open stock gas recovery valve, coal gas warp
Surge tank, regulating valve, check-valves, stop valve are crossed, into purified gas main pipeline；When gas pressure and purified gas main pipeline pressure
When 12kPa is balanced, stop coal-gas recovering, close coal gas recovery valve, turn on the gas diffusion valve makes lower pressure tank reach 0kPa, weight
Newly to lower tank blowing；After blanking terminates, equalizing valve is opened, close diffusion valve, when lower tank is pressed onto into furnace top pressure 220kPa,
Start to blowing in blast furnace；After blowing terminates, upper pressure tank is 220kPa, carries out coal-gas recovering；Instantly pressure tank and purified gas
When main pipeline pressure is 12kPa, stop coal-gas recovering, open diffusion valve, re-start blanking process.
Beneficial effects of the present invention are：
Simple structure of the present invention, it is easy to arrange, safe, good dedusting effect, gas recovery is without dedusting, it is ensured that back pressure
The dustiness of coal gas is less than 5mg/m3, can not only effectively solve the environment that causes of pressure coal gas diffusion and noise pollution, and can be by
Coal-gas recovering, realizes the double effectses of energy-saving and emission-reduction.Meanwhile, the coal gas of recovery is directly entered clean coal gas pipe network, therefore to system
The almost influence without pressure oscillation.
Brief description of the drawings
Fig. 1 is to press gas recovery system structural representation.
In figure：Coal gas main pipeline 3 after tank 1 under furnace roof, pressure gas pipe 2, dry method dust, gas pipe 4, equalizing valve 5, put
Dissipate valve 6, back pressure pipeline 7, recovery valve 8, surge tank 9, regulating valve 10, check-valves 11, stop valve 12, purified gas supervisor
Road 13.
Specific embodiment
As seen from Figure 1, blast furnace roof of the present invention presses gas recovery system, be it is original connection blast furnace roof under tank 1 and on
Pressure gas pipe 2 of the end with diffusion valve 6, gas pipe 4 after connection dry method dust on coal gas main pipeline 3 and its installed in coal
On the basis of equalizing valve 8 on tracheae 4, on the one hand pressure gas pipe 2 is accessed the high pressure of the gas pipe 4 of the front portion of equalizing valve 5
End, 5mg/m is less than with the dustiness for ensureing back pressure coal gas3.Simultaneously be additionally arranged including back pressure pipeline 7, recovery valve 8, surge tank 9,
Regulating valve 10, check-valves 11, stop valve 12 are in interior recovery system.One end of back pressure pipeline 7 is connected into gas pipe 4, separately
One end is connected with purified gas main pipeline 13, and be mounted with successively on back pressure pipeline 7 recovery valve 8, surge tank 9, regulating valve 10,
Check-valves 11 and stop valve 12.So as to after blanking terminates, will press coal-gas recovering to be responsible for purified gas by back pressure pipeline 7
Recycled in road 13, overbottom pressure is then diffused in air.
Blast furnace roof of the present invention presses the specific removal process of coal-gas recovering method to be：
When furnace top even pressure terminates, upper pressure tank is 220kPa, is balanced with furnace top pressure；Open stock gas recovery valve 8, coal gas
By surge tank 9, regulating valve 10, check-valves 11, stop valve 12, into purified gas main pipeline 13；When gas pressure with it is net
When the pressure 12kPa of coal gas main pipeline 13 is balanced, stop coal-gas recovering, close coal gas recovery valve 8, turn on the gas diffusion valve 6 makes
Lower pressure tank reaches 0kPa, again to lower tank blowing；After blanking terminates, equalizing valve 5 is opened, diffusion valve 6 is closed, by lower tank
When being pressed onto furnace top pressure 220kPa, start to blowing in blast furnace, after blowing terminates, upper pressure tank is 220kPa, carries out coal
Gas is reclaimed；Instantly when pressure tank is 12kPa with the pressure of purified gas main pipeline 13, stop coal-gas recovering, open diffusion valve 6, again
Carry out blanking process.
Claims (2)
1. a kind of blast furnace roof presses the pressure gas pipe of tank under gas recovery system, including connection blast furnace roof,
It is connected to gas pipe and equalizing valve on coal gas main pipeline after dry method dust, it is characterised in that will press coal gas
Pipe accesses the anterior gas pipe high-pressure side of equalizing valve, and sets up back pressure pipeline, back pressure pipeline one end connection coal gas
Pipe, the other end is connected with purified gas main pipeline, and recovery valve, surge tank, tune are sequentially installed with back pressure pipeline
Section valve, check-valves and stop valve.
2. the method that blast furnace roof described in a kind of application claim 1 presses gas recovery system, its feature exists
In specific removal process is：
When furnace top even pressure terminates, upper pressure tank is 220kPa, is balanced with furnace top pressure；Stock gas is opened to return
Receive valve, coal gas by surge tank, regulating valve, check-valves, stop valve, into purified gas main pipeline；Work as coal
When atmospheric pressure is balanced with purified gas main pipeline pressure 12kPa, stop coal-gas recovering, close coal gas recovery valve,
Turn on the gas diffusion valve, makes lower pressure tank reach 0kPa, again to lower tank blowing；After blanking terminates, open equal
Pressure valve, closes diffusion valve, when lower tank is pressed onto into furnace top pressure 220kPa, starts, to blowing in blast furnace, to put
After material terminates, upper pressure tank is 220kPa, carries out coal-gas recovering；Instantly pressure tank and purified gas main pipeline pressure
When power is 12kPa, stop coal-gas recovering, open diffusion valve, re-start blanking process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510791186.1A CN106702052A (en) | 2015-11-17 | 2015-11-17 | Blast furnace top pressure-equalizing gas recovery system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510791186.1A CN106702052A (en) | 2015-11-17 | 2015-11-17 | Blast furnace top pressure-equalizing gas recovery system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106702052A true CN106702052A (en) | 2017-05-24 |
Family
ID=58932455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510791186.1A Pending CN106702052A (en) | 2015-11-17 | 2015-11-17 | Blast furnace top pressure-equalizing gas recovery system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106702052A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023061027A1 (en) * | 2021-10-12 | 2023-04-20 | 中冶南方工程技术有限公司 | Blast furnace top material tank pressure equalization gas purification and recovery system and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3884677A (en) * | 1972-11-25 | 1975-05-20 | Nippon Kokan Kk | Blast furnace operating methods |
| CN202054851U (en) * | 2011-04-29 | 2011-11-30 | 中冶赛迪工程技术股份有限公司 | Blast-furnace dry-method even-pressure gas recycling device |
| CN202912974U (en) * | 2012-09-28 | 2013-05-01 | 中冶南方工程技术有限公司 | Pressure-equalizing coal gas recovery device for furnace roof of blast furnace |
| CN104073581A (en) * | 2014-06-18 | 2014-10-01 | 鞍钢集团工程技术有限公司 | Process method and device for forcibly recovering diffused gas of blast furnace |
-
2015
- 2015-11-17 CN CN201510791186.1A patent/CN106702052A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3884677A (en) * | 1972-11-25 | 1975-05-20 | Nippon Kokan Kk | Blast furnace operating methods |
| CN202054851U (en) * | 2011-04-29 | 2011-11-30 | 中冶赛迪工程技术股份有限公司 | Blast-furnace dry-method even-pressure gas recycling device |
| CN202912974U (en) * | 2012-09-28 | 2013-05-01 | 中冶南方工程技术有限公司 | Pressure-equalizing coal gas recovery device for furnace roof of blast furnace |
| CN104073581A (en) * | 2014-06-18 | 2014-10-01 | 鞍钢集团工程技术有限公司 | Process method and device for forcibly recovering diffused gas of blast furnace |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023061027A1 (en) * | 2021-10-12 | 2023-04-20 | 中冶南方工程技术有限公司 | Blast furnace top material tank pressure equalization gas purification and recovery system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170524 |