CN204369915U - Blast furnace gas dust removal and purification system capable of treating gas in segmented manner - Google Patents
Blast furnace gas dust removal and purification system capable of treating gas in segmented manner Download PDFInfo
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- CN204369915U CN204369915U CN201420838257.XU CN201420838257U CN204369915U CN 204369915 U CN204369915 U CN 204369915U CN 201420838257 U CN201420838257 U CN 201420838257U CN 204369915 U CN204369915 U CN 204369915U
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- pipeline
- gas
- gas pipeline
- valve
- back pressure
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- 238000000746 purification Methods 0.000 title claims description 20
- 239000000428 dust Substances 0.000 title abstract description 14
- 239000003034 coal gas Substances 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims description 107
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 52
- 239000012716 precipitator Substances 0.000 claims description 39
- 229910052757 nitrogen Inorganic materials 0.000 claims description 26
- 239000000571 coke Substances 0.000 claims description 24
- 238000009792 diffusion process Methods 0.000 claims description 24
- 239000010881 fly ash Substances 0.000 claims description 7
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000013016 damping Methods 0.000 abstract description 5
- 230000005484 gravity Effects 0.000 abstract 3
- 238000000034 method Methods 0.000 description 31
- 238000010926 purge Methods 0.000 description 11
- 230000000740 bleeding effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
A blast furnace gas dedusting and purifying system capable of processing gas in a segmented mode is characterized in that a node disconnecting switch device is installed between a raw gas pipeline and a gravity dust collector, and a node disconnecting switch device is installed between a back pressure pipeline and a clean gas pipeline. The utility model discloses between with crude gas pipeline and gravity dust collector and semi-clean gas pipeline, block completely with reliable trip valve between back pressure pipeline and the clean gas pipeline, only need handle the crude gas pipeline that influences the furnace roof and ignite and just can carry out the furnace roof with the coal gas in the back pressure pipeline and ignite. The gas in the semi-clean gas pipeline and the gravity dust collector and the gas in the clean gas pipeline after dry dust collection can be treated according to the requirements without being treated every time, and the ignition of the furnace top can not be influenced even if the gas is treated. The main maintenance work (maintenance of furnace top equipment) of blast furnace damping down can be carried out immediately after the furnace top is ignited, so that the maintenance operation can be advanced, and the working efficiency is improved.
Description
Technical field
The utility model relates to the coal gas treatment process in iron-smelting blast furnace production, particularly relates to a kind of dedusting of blast furnace gas purification system of sectional gas treatment.
Background technology
Bell-less blast furnace furnace top equipment needs regular damping down to overhaul, and for ensureing the safety of maintainer and normally carrying out of blast furnace maintenance work, needs first by clean for the coal gas process in dedusting of blast furnace gas purification system.The mode of the blast furnace gas treatment of bell-less BF tep is first damping down, coal gas in post-purge coal gas dust removal purification system, carry out furnace roof igniting again and block the new coal gas produced in blast furnace and discharge in coal gas dust removal purification system.Before furnace roof igniting, furnace top equipment forbids fire operation, and overhaul of the equipments personnel just can carry out upkeep operation after need waiting for and processing the igniting of gas furnace jacking row.Such guarantee blast furnace maintenance work safety carries out efficiently.
Dedusting of blast furnace gas purification system is divided into thick dedusting (gravitational precipitator or tornado dust collector) and meticulous dedusting (wet dedusting or dry method dust) two portions, and the coal gas through the process of coal gas dust removal purification system can enter people's gaspipe network for user.
Owing to lacking reliable shut-off device between original dedusting of blast furnace gas purification system each several part, therefore under the prerequisite be all disposed by the coal gas in whole dedusting of blast furnace gas purification system, just furnace roof igniting can only can be carried out.The mode of process is first process purified gas tubing system and half purified gas tubing system, after the complete chemical examination of gas treatment is qualified, then completes the coal gas process of back pressure pipeline, gravitational precipitator, raw coke oven gas pipeline, then carries out furnace roof igniting.The coal gas process of whole dedusting of blast furnace gas purification system needs for a long time.(during wet dedusting, the contact of cut-out and gaspipe network can carry out furnace roof igniting in latter about 170 minutes, and during dry method dust, the contact of cut-out and gaspipe network can carry out furnace roof igniting in latter about 230 minutes).
The long gas treatment time occupies a large amount of repair time, if extend the damping down time to ensure the repair time, means and can affect pig iron output.
Summary of the invention
The purpose of this utility model is to provide a kind of dedusting of blast furnace gas purification system of sectional gas treatment, block completely with reliable trip valve by raw coke oven gas pipeline and between gravitational precipitator and half purified gas pipeline, between back pressure pipeline and purified gas pipeline, only need process coal gas affect in raw coke oven gas pipeline and back pressure pipeline that furnace roof lights a fire and just can carry out furnace roof igniting.Coal gas after coal gas in half purified gas pipeline and in gravitational precipitator and dry method dust in purified gas pipeline can process as required, need not all process, even need process also can not affect furnace roof igniting at every turn.The service work (maintenance of furnace top equipment) that after furnace roof igniting, blast furnace staying is main can be carried out at once, can make upkeep operation in advance, increase work efficiency.
For achieving the above object, the utility model realizes by the following technical solutions:
A kind of dedusting of blast furnace gas purification system of sectional gas treatment, comprise raw coke oven gas pipeline, gravitational precipitator, half purified gas pipeline, dry-dedusting system, purified gas pipeline, back pressure pipeline, raw coke oven gas pipeline one end is communicated with blast furnace roof, the other end is communicated with gravitational precipitator, gravitational precipitator is communicated with dry-dedusting system by half purified gas pipeline, dry-dedusting system is responsible for net with coal gas by purified gas pipeline and is communicated with, back pressure pipeline one end is communicated with purified gas pipeline, the other end is communicated with blast furnace roof balanced pressure system, node roof-cut resistence device is installed between described raw coke oven gas pipeline and gravitational precipitator, node roof-cut resistence device is installed between described back pressure pipeline and purified gas pipeline.
The node roof-cut resistence device installed between described back pressure pipeline and purified gas pipeline comprises: blank-plate valve, butterfly valve, diffusion valve, manhole, nitrogen pipeline, blank-plate valve one end connects back pressure pipeline, the other end connects purified gas pipeline, connecting pipeline between blank-plate valve and purified gas pipeline installs diffusion valve, butterfly valve successively, the connecting pipeline of blank-plate valve and back pressure pipeline installs manhole, nitrogen pipeline successively.
Node roof-cut resistence device between described raw coke oven gas pipeline and gravitational precipitator comprises fly-ash separator trip valve, nitrogen pipeline, installs fly-ash separator trip valve, nitrogen pipeline successively in the junction of gravitational precipitator and raw coke oven gas pipeline.
Compared with prior art, the beneficial effects of the utility model are:
A kind of dedusting of blast furnace gas purification system of sectional gas treatment, block completely with reliable trip valve by raw coke oven gas pipeline and between gravitational precipitator and half purified gas pipeline, between back pressure pipeline and purified gas pipeline, only need process coal gas affect in raw coke oven gas pipeline and back pressure pipeline that furnace roof lights a fire and just can carry out furnace roof igniting.Coal gas after coal gas in half purified gas pipeline and in gravitational precipitator and dry method dust in purified gas pipeline can process as required, need not all process, even need process also can not affect furnace roof igniting at every turn.The service work (maintenance of furnace top equipment) that after furnace roof igniting, blast furnace staying is main can be carried out at once, can make upkeep operation in advance, increase work efficiency.
Accompanying drawing explanation
Fig. 1 is the structure iron of the dedusting of blast furnace gas purification system of a kind of sectional gas treatment of the utility model;
Embodiment
Below in conjunction with Figure of description, the utility model is described in detail, but it should be noted that enforcement of the present utility model is not limited to following embodiment.
As shown in Figure 1, a kind of dedusting of blast furnace gas purification system of sectional gas treatment, comprise raw coke oven gas pipeline, gravitational precipitator, half purified gas pipeline, dry-dedusting system, purified gas pipeline, back pressure pipeline, raw coke oven gas pipeline one end is communicated with blast furnace roof, the other end is communicated with gravitational precipitator, gravitational precipitator is communicated with dry-dedusting system by half purified gas pipeline, dry-dedusting system is responsible for net with coal gas by purified gas pipeline and is communicated with, back pressure pipeline one end is communicated with purified gas pipeline, the other end is communicated with blast furnace roof balanced pressure system, node roof-cut resistence device is installed between described raw coke oven gas pipeline and gravitational precipitator, node roof-cut resistence device is installed between described back pressure pipeline and purified gas pipeline.
The node roof-cut resistence device installed between back pressure pipeline and purified gas pipeline comprises: blank-plate valve 1, butterfly valve, diffusion valve, manhole 1, nitrogen 1 pipeline, blank-plate valve 1 one end connects back pressure pipeline, the other end connects purified gas pipeline, connecting pipeline between blank-plate valve 1 and purified gas pipeline installs diffusion valve, butterfly valve successively, blank-plate valve 1 with the connecting pipeline of back pressure pipeline install manhole 1, nitrogen 1 pipeline successively.
The using method of blank-plate valve 1 is as follows:
1, close: a) first close butterfly valve; B) diffusion valve 6 between open-blind plate valve 1 and butterfly valve puts clean back pressure manifold pressure; C) blank-plate valve 1 is closed; D) diffusion valve 6 is closed.
2, open: a) first close butterfly valve; B) diffusion valve 6 between open-blind plate valve 1 and butterfly valve puts the manifold pressure between clean blank-plate valve 1 and butterfly valve; C) open-blind plate valve 1; D) diffusion valve 6 is closed; E) opening butterfly valve
Node roof-cut resistence device between described raw coke oven gas pipeline and gravitational precipitator comprises fly-ash separator trip valve, nitrogen 2 pipeline, installs fly-ash separator trip valve, nitrogen 2 pipeline successively in the junction of gravitational precipitator and raw coke oven gas pipeline.Fly-ash separator trip valve is the blank-plate valve that can reliably cut off.
Gravitational precipitator trip valve using method is as follows:
1, gravitational precipitator trip valve is closed: a) open bleeding valve 1 after blast furnace checking to zero, diffusion valve 2, diffusion valve 4 put pressure in clean raw coke oven gas pipeline.B) gravitational precipitator trip valve is closed.
2, gravitational precipitator trip valve is opened: a) ensure that bleeding valve 1, diffusion valve 2, diffusion valve 4 are in open state before blast furnace air-supply.B) ensure to drive gravitational precipitator trip valve before furnace top pressure is less than gravitational precipitator trip valve blowdown of a safety valve after blast furnace air-supply.C) bleeding valve 1, diffusion valve 2, diffusion valve 4 is closed successively.
When blast furnace staying maintenance needs to process the coal gas in dedusting of blast furnace gas purification system, after closing gravitational precipitator trip valve and the blank-plate valve between back pressure pipeline and purified gas pipeline 1, just furnace roof igniting can be carried out after only need processing the coal gas in raw coke oven gas pipeline and back pressure pipeline, greatly save the time needed for gas treatment, just furnace roof igniting can be carried out within 50 minutes after the gravitational precipitator trip valve of pass, than original dry method dust gas treatment save 3 little time, than former wet dedusting gas treatment also save 2 little time.
See Fig. 1, in blast furnace staying overhaul plan pipe network, the embodiment of coal gas is as follows:
1) the ducted coal gas process of back pressure:
Blank-plate valve 1 between back pressure pipeline and purified gas tubing system is closed after complete material by blast furnace, nitrogen 1 pipeline on open-blind plate valve 1 side purges the coal gas in back pressure pipeline and equal row pressure pipeline, guarantee before purging that blast furnace roof No. 1 equalizing valve and No. 1 pressure equalizing blow off valve are opened, at No. 1 pressure equalizing blow off valve place, thief hole is installed and carries out sample examination, another equalizing valve is opened again and pressure equalizing blow off valve purges after qualified, then opening the other manhole 1 of blank-plate valve 1 and blanking tank manhole, is air by nature draft by nitrogen replacement.
After nitrogen purging terminates to open manhole 1, can be purged by staff's spindle flow fan, be air by the nitrogen replacement in back pressure pipeline if needed.(generally do not enter people in back pressure pipeline and do not need such purging)
2) process of raw gas in raw coke oven gas pipeline:
Gravitational precipitator trip valve leaves nitrogen 2 after cutting out, coal gas is driven away to furnace roof and diffuse, at 1,2, No. 4 diffusion valve place, thief hole is installed and carries out sample examination, chemically examine qualified rear closedown nitrogen, open gravitational precipitator trip valve top manhole 2, nitrogen in pipeline is evacuated to furnace roof by nature draft and diffuses and displace.
After nitrogen purging terminates to open trip valve top manhole 2, can be purged by staff's spindle flow fan, be air by the nitrogen replacement in back pressure pipeline if needed.(generally do not enter people in coal gas downtake and do not need such purging)
3) process of purified gas pipeline:
Purified gas pipeline can determine whether process as the case may be, by the blank-plate valve 2,3,4 of casing each in dry-dedusting system during process ... n closes, blank-plate valve 1 between back pressure pipeline and purified gas pipeline is closed, before coal gas supervisor net, open nitrogen 4 purge, carry out diffusing at diffusion valve 5 place of purified gas pipeline and sample examination, after nitrogen purging terminates to open manhole 4, can be purged by staff's spindle flow fan, be air by the nitrogen replacement in purified gas pipeline if needed.
4) the coal gas process of half purified gas pipeline and gravitational precipitator:
Close at gravitational precipitator trip valve, the blank-plate valve 5 of each casing in dry-dedusting system, 6, 7 ... after n closes, open gravitational precipitator diffusion valve (manual diffusion valve, electronic diffusion valve), open half purified gas pipe end nitrogen 3 carry out purging (can with raw coke oven gas pipeline, the coal gas process same time of back pressure pipeline starts process, be independent of each other, do not affect furnace roof igniting simultaneously yet, that is the damping down time is not affected), by gravitational precipitator diffusion valve (manual diffusion valve, electronic diffusion valve) carry out diffusing and sample examination, the manhole 3 of half purified gas pipe end is opened after qualified, purged at the manhole 3 spindle flow fan of half purified gas pipe end by staff, be air by the nitrogen replacement in half purified gas pipeline and gravitational precipitator.
Claims (3)
1. the dedusting of blast furnace gas purification system of a sectional gas treatment, comprise raw coke oven gas pipeline, gravitational precipitator, half purified gas pipeline, dry-dedusting system, purified gas pipeline, back pressure pipeline, raw coke oven gas pipeline one end is communicated with blast furnace roof, the other end is communicated with gravitational precipitator, gravitational precipitator is communicated with dry-dedusting system by half purified gas pipeline, dry-dedusting system is responsible for net with coal gas by purified gas pipeline and is communicated with, back pressure pipeline one end is communicated with purified gas pipeline, and the other end is communicated with blast furnace roof balanced pressure system; It is characterized in that, node roof-cut resistence device is installed between described raw coke oven gas pipeline and gravitational precipitator, node roof-cut resistence device is installed between described back pressure pipeline and purified gas pipeline.
2. the dedusting of blast furnace gas purification system of a kind of sectional gas treatment according to claim 1, it is characterized in that, the node roof-cut resistence device installed between described back pressure pipeline and purified gas pipeline comprises: blank-plate valve, butterfly valve, diffusion valve, manhole, nitrogen pipeline, blank-plate valve one end connects back pressure pipeline, the other end connects purified gas pipeline, connecting pipeline between blank-plate valve and purified gas pipeline installs diffusion valve, butterfly valve successively, the connecting pipeline of blank-plate valve and back pressure pipeline installs manhole, nitrogen pipeline successively.
3. the dedusting of blast furnace gas purification system of a kind of sectional gas treatment according to claim 1, it is characterized in that, node roof-cut resistence device between described raw coke oven gas pipeline and gravitational precipitator comprises fly-ash separator trip valve, nitrogen pipeline, installs fly-ash separator trip valve, nitrogen pipeline successively in the junction of gravitational precipitator and raw coke oven gas pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420838257.XU CN204369915U (en) | 2014-12-23 | 2014-12-23 | Blast furnace gas dust removal and purification system capable of treating gas in segmented manner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420838257.XU CN204369915U (en) | 2014-12-23 | 2014-12-23 | Blast furnace gas dust removal and purification system capable of treating gas in segmented manner |
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| Publication Number | Publication Date |
|---|---|
| CN204369915U true CN204369915U (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420838257.XU Expired - Fee Related CN204369915U (en) | 2014-12-23 | 2014-12-23 | Blast furnace gas dust removal and purification system capable of treating gas in segmented manner |
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| CN (1) | CN204369915U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110317911A (en) * | 2019-06-21 | 2019-10-11 | 新兴铸管股份有限公司 | Blast furnace medium-capital overhauling quickly draws coal gas method after going into operation |
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2014
- 2014-12-23 CN CN201420838257.XU patent/CN204369915U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110317911A (en) * | 2019-06-21 | 2019-10-11 | 新兴铸管股份有限公司 | Blast furnace medium-capital overhauling quickly draws coal gas method after going into operation |
| CN110317911B (en) * | 2019-06-21 | 2021-03-26 | 新兴铸管股份有限公司 | Method for quickly introducing coal gas after blast furnace overhaul and mid-term delivery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150603 Termination date: 20191223 |
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| CF01 | Termination of patent right due to non-payment of annual fee |