CN102925603B - Process and device for recycling pressure-equalizing diffusion gas at blast furnace top - Google Patents
Process and device for recycling pressure-equalizing diffusion gas at blast furnace top Download PDFInfo
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- CN102925603B CN102925603B CN201210435523.XA CN201210435523A CN102925603B CN 102925603 B CN102925603 B CN 102925603B CN 201210435523 A CN201210435523 A CN 201210435523A CN 102925603 B CN102925603 B CN 102925603B
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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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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a process and a device for recycling pressure-equalizing diffusion gas at the blast furnace top. The process is characterized by comprising the steps of enabling a feeding tank to be communicated with a dust chamber at the lower portion of a gas dry cloth bag dust removal box through a pressure-equalizing diffusion raw gas recycling pipeline, and installing a valve group for controlling connection and disconnection of the diffusion raw gas recycling pipeline on the pressure-equalizing diffusion raw gas recycling pipeline; stopping a cloth bag of the box from filtering blast furnace gas; turning on a gas blind plate valve and a gas cutting-off valve on a clean gas recycling pipeline to perform pressure relief on the box; and when the feeding tank at the blast furnace top needs gas pressure relief, turning on the valve group used for controlling connection and disconnection of the diffusion raw gas recycling pipeline and arranged on the pressure-equalizing diffusion raw gas recycling pipeline, wherein raw gas enters the dust removal box through a gas diffusion pipe and the pressure-equalizing diffusion raw gas recycling pipeline, filtered clean gas enters a clean gas main pipe through the clean gas recycling pipeline, and accordingly, recycling of pressure-equalizing diffusion gas in the feeding tank is achieved. The device for recycling the pressure-equalizing diffusion gas at the blast furnace top has the advantages of saving gas energy, avoiding environment pollution, saving investment of capital construction and being high in operation stability.
Description
Technical field
The present invention relates to a kind of a kind of blast furnace top pressure-equalizing bleeding coal-gas recovering used in metallurgical gases recovery and Environmental-protecting dust-removing technical field and utilizes technique and device thereof.
Background technology
Furnace top even pressure coal gas diffusion technique in existing blast furnace production process, adopt all presses coal gas directly diffuse technique to sky or set up independently dry-method dust removal of coal gas recovery system more, technically has the following disadvantages:
1, contaminate environment.Discharge dust-laden coal gas when sky is diffused, air, noise pollution are caused to environment.
2, waste energy.Coal gas energy dissipation is caused when sky is diffused.
Set up independently dry-method dust removal of coal gas recovery system, increase investment, operation stability is poor.
Summary of the invention
Object of the present invention a kind ofly utilizes existing blast furnace gas drying bag dust removing device system to utilize technique as the filtered and recycled of blast furnace roof charger pan pressure-equalizing and discharging coal gas with regard to being to provide, during the coal gas diffusion release of blast furnace roof charger pan, pass through valve operation, pressure-equalizing and discharging raw gas enters coal gas dry method dust-remover casing, recycling dust-removing box cloth bag filters dust-laden coal gas, after filtering, coal gas enters gas main, reaches the blast furnace top pressure-equalizing bleeding coal-gas recovering technique and device thereof recycling and require.
Solution of the present invention is such:
Recovery process of the present invention comprises step:
(1), with pressure-equalizing and discharging raw gas recovery channel be communicated with charger pan and coal gas dry-method bag-type dust collecting lower box dirt air chamber, pressure-equalizing and discharging raw gas recovery channel is installed the valve group controlling to diffuse raw gas recovery channel break-make;
(2), close the 3rd sealed butterfly valve and the 4th sealed butterfly valve that dust-removing box imports and exports, stop casing cloth bag blast furnace gas to filter;
(3), open coal gas blank-plate valve and gas stop valve on purified gas recovery channel, carry out casing release;
(4), top charging tank carries out coal gas release step, opens the valve group of pressure-equalizing and discharging raw gas recovery channel being installed and controlling to diffuse raw gas recovery channel break-make, allows charger pan be communicated with coal gas dry-method bag-type dust collecting lower box dirt air chamber;
(5), pressure-equalizing and discharging coal-gas recovering step: set up the purified gas recovery channel being with on-off valve group between purified gas house steward and the top air-purifying chamber of dust-removing box, when top charging tank carries out coal gas release, open the on-off valve group between purified gas house steward and dust-removing box, raw gas is by pressure-equalizing and discharging raw gas recovery channel, enter dust-removing box, purified gas after filtration enters purified gas house steward by purified gas recovery channel, realizes the recovery of pressure-equalizing and discharging coal gas in charger pan.
Processing step also comprises more specifically:
Pressure-equalizing and discharging raw gas recovery channel is communicated with and is communicated with two coal gas dry-method bag-type dust collecting lower box dirt air chambers simultaneously, and under the prerequisite ensureing casing cloth bag temperature, two casings regularly hocket recovery emission coal gas.
In described step (4), also comprise step: when opening installation on pressure-equalizing and discharging raw gas recovery channel and controlling to diffuse the valve group of raw gas recovery channel break-make, maintain gas stop valve to keep closing, all the other valve groups are all opened, when top charging tank needs coal gas release, then the trip valve that turns on the gas-fire is communicated with charger pan and coal gas dry-method bag-type dust collecting lower box dirt air chamber.
The present invention is be provided with pressure-equalizing and discharging raw gas recovery channel between charger pan and coal gas dry-method bag-type dust collecting lower box dirt air chamber to the device that above-mentioned technique reclaims, and pressure-equalizing and discharging raw gas recovery channel is installed the valve group controlling to diffuse raw gas recovery channel break-make; Between purified gas house steward and the top air-purifying chamber of dust-removing box, be provided with purified gas recovery channel, purified gas recovery channel is installed the valve group controlling break-make.
Retrieving arrangement also comprises following technical scheme more specifically:
Described coal gas dry-method bag-type dust collecting casing is at least two.
The valve group of described control emission coal gas recovery tube break-make comprises the first gas stop valve, the first coal gas blank-plate valve, the first sealed butterfly valve or the second sealed butterfly valve.
The first described sealed butterfly valve or the outlet side of the second sealed butterfly valve are the inlet ends of connection second coal gas blank-plate valve.
Coal gas diffusion pipe on described charger pan is connected with Y-junction, and described pressure-equalizing and discharging raw gas recovery channel is connected to coal gas diffusion pipe, thus be communicated with charger pan.
Described purified gas recovery channel is installed control on-off valve group and comprise the 3rd coal gas blank-plate valve, the second gas stop valve.
Advantage of the present invention is:
(1) the gas saving energy.Shaft furnace charging tank coal gas to after sky discharge, by recycling after Bag filter, has not reclaimed the energy;
(2) environmental pollution is avoided.Blast furnace bucket emission coal gas is avoided causing topsoil, noise pollution to environment after recycling.
(3) initial cost is saved.All consider there is overhaul reserve casing in blast furnace gas dry dusting design, utilize existing blast furnace gas dry dusting casing, do not need to aim at blast furnace out-spreading coal-gas recovering and utilize and newly-built dust-removing box, save front capital and drop into.
(4) operation stability is high.Utilize blast furnace gas dry dusting 2 casings to reclaim emission coal gas, under the prerequisite ensureing casing cloth bag temperature, 2 casings regularly hocket recovery emission coal gas.In actual motion, wherein 1 casing carries out recovery emission coal gas, and another 1 is dropped into dedusting of blast furnace gas explained hereafter, guarantees the steady running of dust-removal cloth-bag.
Accompanying drawing explanation
Accompanying drawing is for explaining the present invention.
Accompanying drawing 1 is traditional blast furnace top pressure-equalizing bleeding gas process and device schematic diagram thereof.
Accompanying drawing 2 is retrieving arrangement schematic diagram of the present invention.
Embodiment
In the present embodiment accompanying drawing, each parts are detailed as follows:
1, blast-furnace body, 2, charger pan, 3, hopper, 4, coal gas equalizing valve, 5, coal gas diffusion pipe, 6, to empty diffusion valve, 7, first gas stop valve, 8, pressure-equalizing and discharging raw gas recovery channel, 9, first coal gas blank-plate valve, 10, first sealed butterfly valve, 11, second sealed butterfly valve, 12, blast furnace half purified gas house steward, 13, 3rd sealed butterfly valve, 14, second coal gas blank-plate valve, 15, coal gas dry-method bag-type dust collecting casing, 16, purified gas recovery channel, 17, 3rd coal gas blank-plate valve, 18, second gas stop valve, 19, purified gas house steward, 20, dry method dust casing diffusion valve, 21, 4th coal gas blank-plate valve, 22, 4th sealed butterfly valve, 23, high pressure purified gas house steward, 24, blast furnace gas ascending pipe, 25, coal gas gravitational precipitator.
Recovery process of the present invention, its processing step comprises:
(1), with pressure-equalizing and discharging raw gas recovery channel 8 be communicated with charger pan 2 and coal gas dry-method bag-type dust collecting casing 15 bottom dirt air chamber, pressure-equalizing and discharging raw gas recovery channel 8 is installed the valve group controlling to diffuse raw gas recovery channel break-make;
(2), close the 3rd sealed butterfly valve 13 and the 4th sealed butterfly valve 22 that dust-removing box 15 imports and exports, stop casing cloth bag blast furnace gas to filter;
(3), open coal gas blank-plate valve 17 and gas stop valve 18 on purified gas recovery channel, carry out casing release;
(4), top charging tank 2 carries out coal gas release step: open the valve group of pressure-equalizing and discharging raw gas recovery channel 8 being installed and controlling to diffuse raw gas recovery channel break-make, allow charger pan 2 be communicated with coal gas dry-method bag-type dust collecting casing 15 bottom dirt air chamber;
(5), pressure-equalizing and discharging coal-gas recovering step: set up the purified gas recovery channel 16 being with on-off valve group between purified gas house steward 19 and the top air-purifying chamber of dust-removing box 15, when top charging tank 2 carries out coal gas release, open the on-off valve group between purified gas house steward 19 and dust-removing box 15, raw gas is by coal gas diffusion pipe 5 and pressure-equalizing and discharging raw gas recovery channel 8, enter dust-removing box 15, purified gas after filtration enters purified gas house steward 19 by purified gas recovery channel 16, realizes the recovery of pressure-equalizing and discharging coal gas in charger pan 2.
The present embodiment is the recovery process of employing two coal gas dry-method bag-type dust collecting devices, therefore, also comprise step: pressure-equalizing and discharging raw gas recovery channel 8 is communicated with and is communicated with two coal gas dry-method bag-type dust collecting casing 15 bottom dirt air chambers simultaneously, under the prerequisite ensureing casing cloth bag temperature, two casings regularly hocket recovery emission coal gas.
When opening installation on pressure-equalizing and discharging raw gas recovery channel 8 and controlling to diffuse the valve group of raw gas recovery channel break-make, maintain gas stop valve 7 to keep closing, all the other valve groups are all opened, when top charging tank 2 needs coal gas release, then the trip valve 7 that turns on the gas-fire is communicated with charger pan 2 and coal gas dry-method bag-type dust collecting casing 15 bottom dirt air chamber.
The retrieving arrangement of the present embodiment, between charger pan 2 and two coal gas dry-method bag-type dust collecting casing 15 bottom dirt air chambers, be provided with pressure-equalizing and discharging raw gas recovery channel 8, pressure-equalizing and discharging raw gas recovery channel 8 is installed the valve group controlling to diffuse raw gas recovery channel break-make.The valve group of described control emission coal gas recovery tube break-make comprises the first gas stop valve 7, first coal gas blank-plate valve 9, first sealed butterfly valve 10, second sealed butterfly valve 11; The first described sealed butterfly valve 10 or the outlet side of the second sealed butterfly valve 11 are inlet ends of connection second coal gas blank-plate valve 14.
For avoiding opening too much hole on charger pan 2, therefore, the coal gas diffusion pipe 5 of the present embodiment on described charger pan 2 is connected with Y-junction, described pressure-equalizing and discharging raw gas recovery channel 8 is connected to coal gas diffusion pipe 5, thus be communicated with charger pan 2; Coal gas diffusion pipe 5 outlet side can be connected to pressure-equalizing and discharging raw gas recovery channel 8, also can be by gas bleeding valve 6 pairs of air emptying
Blast furnace roof charger pan 2 has coal gas diffusion pipe 5 and to empty diffusion valve 6, pressure-equalizing and discharging raw gas recovery channel 8 connected by coal gas diffusion pipe 5, pressure-equalizing and discharging raw gas recovery channel 8 connects dry-method bag-type dust collecting casing 15 bottom, purified gas recovery channel 16 is arranged at dry-method bag-type dust collecting casing 15 top, purified gas recovery channel 16 connects purified gas house steward 19, all pressures coal gas in charger pan 2 enters dry-method bag-type dust collecting casing 15 bottom dirt air chamber through pressure-equalizing and discharging raw gas recovery channel 8, after filtering, purified gas enters purified gas house steward 19 through purified gas recovery channel 16 again, pressure-equalizing and discharging raw gas recovery channel 8 is provided with the first gas stop valve 7, first coal gas blank-plate valve 9, first sealed butterfly valve 10, second sealed butterfly valve 11, the first described sealed butterfly valve 10 or the outlet side of the second sealed butterfly valve 11 are inlet ends of connection second coal gas blank-plate valve 14, purified gas recovery channel 16 is provided with the 3rd coal gas blank-plate valve 17 controlling coal gas break-make, second gas stop valve 18.
The outlet side of described pressure-equalizing and discharging raw gas recovery channel 8 is connected to the bottom dirt air chamber of dust-removing box 15, is connected to dust-removing box 15 and can solves dust coal gas filtration problem; Purified gas recovery channel 16 is the top air-purifying chambers being connected to dust-removing box 15; The outlet side of purified gas recovery channel 16 is connected to purified gas house steward 19, is connected to purified gas house steward 19 and can solves and discharge to air emptying the pollution problem brought; The valve group of described control purified gas recovery channel break-make is the 3rd coal gas blank-plate valve 17, second gas stop valve 18.
The operating process of the present embodiment is: see accompanying drawing 2, close the 3rd sealed butterfly valve 13 and the 4th sealed butterfly valve 22 of the import and export of coal gas dry-method bag-type dust collecting casing 15, casing cloth bag blast furnace gas is stopped to filter, open the first coal gas blank-plate valve 9 on raw gas recovery channel, first sealed butterfly valve 10 and the second coal gas blank-plate valve 14, then the 3rd coal gas blank-plate valve 17 and the second gas stop valve 18 on purified gas recovery channel is opened, carry out casing release, when top charging tank 2 needs coal gas release, open the first gas stop valve 7, raw gas is by coal gas diffusion pipe 5 and pressure-equalizing and discharging raw gas recovery channel 8, enter coal gas dry-method bag-type dust collecting casing 15, purified gas after filtration enters purified gas house steward 19 by purified gas recovery channel 16, realize the recovery of pressure-equalizing and discharging coal gas in charger pan 2.
Claims (7)
1. the device for blast furnace top pressure-equalizing bleeding coal-gas recovering technique, it is characterized in that being provided with pressure-equalizing and discharging raw gas recovery channel (8) between charger pan (2) and coal gas dry-method bag-type dust collecting casing (15) bottom dirt air chamber, control the valve group of diffusing raw gas recovery channel break-make in the upper installation of pressure-equalizing and discharging raw gas recovery channel (8); Purified gas recovery channel (16) is provided with, in the upper valve group of installing control break-make of purified gas recovery channel (16) between purified gas house steward (19) and the top air-purifying chamber of dust-removing box (15); Described coal gas dry-method bag-type dust collecting casing (15) is at least two; Described coal gas dry-method bag-type dust collecting casing (15) bottom is communicated to blast furnace half purified gas house steward (12) by the 3rd sealed butterfly valve (13), and coal gas dry-method bag-type dust collecting casing (15) top is communicated to high pressure purified gas house steward (23) by the 4th sealed butterfly valve (21).
2. the device for blast furnace top pressure-equalizing bleeding coal-gas recovering technique according to claim 1, is characterized in that the valve group of described control emission coal gas recovery tube break-make comprises the first gas stop valve (7), the first coal gas blank-plate valve (9), the first sealed butterfly valve (10) or the second sealed butterfly valve (11).
3. the device for blast furnace top pressure-equalizing bleeding coal-gas recovering technique according to claim 1, is characterized in that the outlet side of described the first sealed butterfly valve (10) or the second sealed butterfly valve (11) is the inlet end of connection second coal gas blank-plate valve (14).
4. the device for blast furnace top pressure-equalizing bleeding coal-gas recovering technique according to claim 3, it is characterized in that the coal gas diffusion pipe (5) on described charger pan (2) is connected with Y-junction, described pressure-equalizing and discharging raw gas recovery channel (8) is connected to coal gas diffusion pipe (5), thus be communicated with charger pan (2).
5. the device for blast furnace top pressure-equalizing bleeding coal-gas recovering technique according to claim 1, is characterized in that the upper control on-off valve group of installing of described purified gas recovery channel (16) comprises the 3rd coal gas blank-plate valve (17), the second gas stop valve (18).
6., for a recovery process for device described in claim 1, it is characterized in that comprising step:
(1), with pressure-equalizing and discharging raw gas recovery channel (8) be communicated with charger pan (2) and coal gas dry-method bag-type dust collecting casing (15) bottom dirt air chamber, control the valve group of diffusing raw gas recovery channel break-make in the upper installation of pressure-equalizing and discharging raw gas recovery channel (8); Described pressure-equalizing and discharging raw gas recovery channel (8) is communicated with two coal gas dry-method bag-type dust collecting casing (15) bottom dirt air chambers simultaneously, and under the prerequisite ensureing casing cloth bag temperature, two casings regularly hocket recovery emission coal gas;
(2), close dust-removing box (15) the 3rd sealed butterfly valve (13) imported and exported and the 4th sealed butterfly valve (22), stop the filtration of casing cloth bag blast furnace gas;
(3), open coal gas blank-plate valve (17) and gas stop valve (18) on purified gas recovery channel, carry out casing release;
(4), top charging tank 2 carries out coal gas release step: open the valve group that the upper installation of pressure-equalizing and discharging raw gas recovery channel (8) controls to diffuse raw gas recovery channel break-make, allow charger pan (2) be communicated with coal gas dry-method bag-type dust collecting casing (15) bottom dirt air chamber;
(5), pressure-equalizing and discharging coal-gas recovering step: set up the purified gas recovery channel (16) being with on-off valve group between purified gas house steward (19) and the top air-purifying chamber of dust-removing box (15), when top charging tank (2) carries out coal gas release, open the on-off valve group between purified gas house steward (19) and dust-removing box (15), raw gas is by pressure-equalizing and discharging raw gas recovery channel (8), enter dust-removing box (15), purified gas after filtration enters purified gas house steward (19) by purified gas recovery channel (16), realize the recovery of the interior pressure-equalizing and discharging coal gas of charger pan (2).
7. recovery process according to claim 6, it is characterized in that in described step (4), also comprise step: when opening the upper installation of pressure-equalizing and discharging raw gas recovery channel (8) and controlling to diffuse the valve group of raw gas recovery channel break-make, maintain gas stop valve (7) to keep closing, all the other valve groups are all opened, when top charging tank (2) needs coal gas release, then the trip valve that turns on the gas-fire (7) is communicated with charger pan (2) and coal gas dry-method bag-type dust collecting casing (15) bottom dirt air chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210435523.XA CN102925603B (en) | 2012-11-05 | 2012-11-05 | Process and device for recycling pressure-equalizing diffusion gas at blast furnace top |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210435523.XA CN102925603B (en) | 2012-11-05 | 2012-11-05 | Process and device for recycling pressure-equalizing diffusion gas at blast furnace top |
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| Publication Number | Publication Date |
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| CN102925603A CN102925603A (en) | 2013-02-13 |
| CN102925603B true CN102925603B (en) | 2015-06-03 |
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| CN201210435523.XA Active CN102925603B (en) | 2012-11-05 | 2012-11-05 | Process and device for recycling pressure-equalizing diffusion gas at blast furnace top |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359005B (en) * | 2014-11-10 | 2017-02-15 | 河南中鸿集团煤化有限公司 | Automatic recycling device for discharged gas |
| CN106636507B (en) * | 2016-07-30 | 2019-09-10 | 柳州钢铁股份有限公司 | Blast furnace gas dry bag-type dusting machinery formula pressure unloads grey technique and its device |
| CN112375861B (en) * | 2020-10-30 | 2021-09-24 | 包头市泽润机械设备有限责任公司 | Blast furnace pressure-equalizing bleeding gas recovery equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476004A (en) * | 2009-02-09 | 2009-07-08 | 江苏沙钢集团有限公司 | Complete clean gas voltage equalizing method and system for blast furnace bucket |
| CN101892336A (en) * | 2010-06-25 | 2010-11-24 | 鞍山亨通高炉设备工程技术有限公司 | Coal-gas recovering process and device of charging, equalizing and bleeding of blast furnace |
| CN201969442U (en) * | 2011-03-02 | 2011-09-14 | 柳州钢铁股份有限公司 | Dry-method dust remover for blast-furnace gas |
| CN202945253U (en) * | 2012-11-05 | 2013-05-22 | 柳州钢铁股份有限公司 | Device for recovering constant-pressure gas discharged on top of blast furnace |
-
2012
- 2012-11-05 CN CN201210435523.XA patent/CN102925603B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101476004A (en) * | 2009-02-09 | 2009-07-08 | 江苏沙钢集团有限公司 | Complete clean gas voltage equalizing method and system for blast furnace bucket |
| CN101892336A (en) * | 2010-06-25 | 2010-11-24 | 鞍山亨通高炉设备工程技术有限公司 | Coal-gas recovering process and device of charging, equalizing and bleeding of blast furnace |
| CN201969442U (en) * | 2011-03-02 | 2011-09-14 | 柳州钢铁股份有限公司 | Dry-method dust remover for blast-furnace gas |
| CN202945253U (en) * | 2012-11-05 | 2013-05-22 | 柳州钢铁股份有限公司 | Device for recovering constant-pressure gas discharged on top of blast furnace |
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