CN107326134A - The coal gas pressure-equalizing bleeding device and its application method of pressure vessel multistage dedusting - Google Patents
The coal gas pressure-equalizing bleeding device and its application method of pressure vessel multistage dedusting Download PDFInfo
- Publication number
- CN107326134A CN107326134A CN201710461724.XA CN201710461724A CN107326134A CN 107326134 A CN107326134 A CN 107326134A CN 201710461724 A CN201710461724 A CN 201710461724A CN 107326134 A CN107326134 A CN 107326134A
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- valve
- pressure vessel
- pressure
- stop valve
- coal gas
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- 239000003034 coal gas Substances 0.000 title claims abstract description 47
- 230000000740 bleeding effect Effects 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000009792 diffusion process Methods 0.000 claims abstract description 28
- 239000000428 dust Substances 0.000 claims description 40
- 239000004744 fabric Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 7
- 238000010410 dusting Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 abstract description 3
- 238000012216 screening Methods 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 abstract 1
- 239000000706 filtrate Substances 0.000 description 9
- 238000007599 discharging Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229920000914 Metallic fiber Polymers 0.000 description 2
- 229920000784 Nomex Polymers 0.000 description 2
- 238000001467 acupuncture Methods 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004763 nomex Substances 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
Abstract
The pressure-equalizing bleeding device and its application method of a kind of pressure vessel coal gas, belong to metallurgical engineering technical field.Including pressure vessel, diffusion valve, reducing joint, sack cleaner, equalizing valve, orifice plate and coal gas discharge tube etc.；Equal pressurized air source enters pressure vessel through sack cleaner, and realization is pressed, and wherein the entrance of reducing joint 4 is path, a diameter of 300mm~500mm；Export as big footpath, a diameter of 500mm~700mm；Open unlatching safety device after bleeding device realization is diffused and realize security function.Advantage is, solves impurity screening accumulation problem, alleviates impact of the air-flow to equipment, reduction is polluted and idle discharge is put.
Description
Technical field
The invention belongs to metallurgical engineering ironmaking technology field, the coal gas of more particularly to a kind of multistage dedusting of pressure vessel is pressed
Bleeding device and its application method.
Background technology
The process characteristic of blast furnace top weighing batch can pressure-equalizing and discharging is：Media operation pressure：0~0.25MPa.In high pressure and
Cycle alternation between atmospheric pressure state, goes round and begins again.Transition state is up to 15 times per hour.Instantaneous processing air quantity is big, reach 10~
15Nm3/ s, duration short 15~20s, are drained into raw coke oven gas dustiness about 20~30g/Nm in air3。
The pans of grey technique are unloaded in blast furnace crude gas system, and there is also the coal gas pressure-equalizing and discharging that similar furnace roof weighs batch can
Technique, wherein being also required in a short time be diffused the high pressure gas in pressure vessel.At present, the pressure in ironmaking technology
The following problem of force container pressure-equalizing bleeding device generally existing：
If 1. there is no refined dedusting device sack cleaner in the coal gas pressure-equalizing and discharging process of the pressure vessel, without refined dedusting
Coal gas afterwards is directly discharged into air, and great pollution is caused to environment.
If 2. refined dedusting device sack cleaner is provided with the coal gas pressure-equalizing and discharging process of the pressure vessel, due to discharge wink
When pressure it is big, the characteristics of time is short easily causes the damage to refined dedusting device.
3. traditional being designed with the pressure-equalizing bleeding device of refined dedusting device sack cleaner has dedusting ash can not be effective
Fall back in pressure vessel, result in blockage, have a strong impact on follow-up pressure-equalizing and discharging process.
Pressure-equalizing bleeding device and its technique in the present invention deposit the effective conventional pressure vessel pressure-equalizing bleeding device that solves
The problem of.
The content of the invention
It is an object of the invention to provide a kind of coal gas pressure-equalizing bleeding device of the multistage dedusting of pressure vessel and its user
Method, solves in traditional ironmaking technology pressure vessel coal gas pressure-equalizing and discharging pollution height, refined dedusting device sack cleaner rapid wear, easy
The problem of blocking.Realize low emission, improve environment, and the life-span of extension refined dedusting device sack cleaner.
A kind of coal gas pressure-equalizing bleeding device of the multistage dedusting of pressure vessel, including pressure-equalizing device, bleeding device and safety dress
Put three parts；Pressure-equalizing device is by equal pressurized air source 11, equalizing valve 7, sack cleaner 6, stop valve 25, cyclone dust collectors 4, cut-out
Valve 1 and pressure vessel 1 are in series composition, and equalizing valve 7 is provided between equal pressurized air source 11 and sack cleaner 6, is removed in cloth bag
Stop valve 25 is provided between dirt device 6 and cyclone dust collectors 4, stop valve one is provided between cyclone dust collectors 4 and pressure vessel 1
2；When pressing, the diffusion valve 3 and stop valve 38 closed in bleeding device open stop valve 1, the stop valve in pressure-equalizing device
25 and equalizing valve 7, equal pressurized air source 11 enters pressure vessel 1 through sack cleaner 6 and cyclone dust collectors 4, and work(is pressed in realization
Energy；Bleeding device is by pressure vessel 1, diffusion valve 3, cyclone dust collectors 4, stop valve 25, sack cleaner 6, stop valve 38, hole
Plate 9 and coal gas discharge tube 12 are in series composition, diffusion valve 3 are provided between pressure vessel 1 and cyclone dust collectors 4, in whirlwind
Stop valve 25 is provided between deduster 4 and sack cleaner 6, is provided with and cuts between sack cleaner 6 and coal gas discharge tube 12
Disconnected valve 38 and orifice plate 9；When diffusing, stop valve 38, stop valve 25 and the diffusion valve 3 of bleeding device are opened, coal gas is removed through whirlwind
Dirt device 4 and sack cleaner 6 enter coal gas discharge tube 12 after filtering, and realize diffusion function；Safety device is by pressure vessel
1st, safety valve 10 and coal gas discharge tube 12 are in series composition, and safety device is between pressure vessel 1 and coal gas discharge tube 12
Provided with safety valve 10；When the pressure in pressure vessel 1 is instantaneously more than setting safe pressure upper limit 0.3MPa~0.32MPa, open
Open the gas after safety device in pressure vessel 1 to be discharged into coal gas discharge tube 12 through safety valve 10, realize security function.
A kind of application method of the coal gas pressure-equalizing bleeding device of the multistage dedusting of pressure vessel, its specific steps and parameter are such as
Under：
1st, press：Diffusion valve 3 and stop valve 38 are closed, stop valve 1, stop valve 25 and equalizing valve 7 is opened, calms the anger
Source 11 enters pressure vessel 1 through equalizing valve 7, sack cleaner 6, stop valve 25, cyclone dust collectors 4 and stop valve 1,
While the dust saved bit by bit in sack cleaner 6 and cyclone dust collectors 4 is blown back pressure vessel 1 by pressurized air source 11, make pressure vessel 1
Default equalizing pressure 0.2MPa~0.3MPa is reached, uniform voltage function is realized, is then shut off equalizing valve 7 and stop valve 1.
2nd, diffuse：After the completion of pressing, the coal gas warp in bleeding device, stop valve 38 and diffusion valve 3, pressure vessel 1 is opened
Diffusion valve 3, cyclone dust collectors 4, stop valve 25, sack cleaner 6, stop valve 38 and orifice plate 9 enter coal gas row after filtering
Pipeline 12 is put, when the pressure in pressure vessel 1 reaches preset pressure 0MPa, diffusion function is realized, is then shut off the He of diffusion valve 3
Stop valve 38.
During this is diffused, cyclone dust collectors 4 are one-time dedusting, and sack cleaner 6 is final dusting.Due to pressure
The instantaneous pressure of container 1 is larger, 4 cushioning effects of cyclone dust collectors；Orifice plate 9 during this can effectively reduce sack cleaner
6 pressure differences imported and exported, so as to reduce impact of the emission coal gas to cloth bag in sack cleaner 6；Sack cleaner 6 during this
The Bag filter area suitable by accurately calculating；Metal filter bag can be used in sack cleaner 6 during this is diffused
Formula deduster, this kind of metal filtrate sack cleaner can solve that pressure difference ability that conventional cloth bag deduster bears is small, hardened etc. to ask
Topic；It substantially prolongs the life-span of sack cleaner.Tradition diffuses dustiness about 20~30g/Nm of raw coke oven gas3, through bag-type dust
Dustiness after the refined dedusting of device 6 is about 2~5mg/Nm3。
3rd, when the pressure in pressure vessel 1 is instantaneously more than setting safe pressure upper limit 0.3MPa~0.32MPa, peace is opened
Gas after full device in pressure vessel 1 is discharged into coal gas discharge tube 12 through safety valve 10, realizes security function.
Refined dedusting form typically has three kinds：Bag-type dusting, wet dedusting, electric precipitation.Pressed according to top gas
The batch technology feature of cycle alternation between high pressure and atmospheric pressure state is dispersed in, is practically impossible to using wet dedusting, electric precipitation
, sack cleaner can only be used.The filtrate of current bag-type dusting is substantially Nomex non-woven fabrics, in its suitable temperature model
Enclose interior long-term work dust removing effects good.But it is using there is certain limitation, and a pressure difference being subject to is small, what most of filtrates were born
Pressure difference is within 7~8kPa, and pressure difference, which crosses conference, makes ultrafine dust through filtrate and filter, alternate big pressure difference operation, also will be big
Big reduction life-span of filtering material.Two be that acupuncture lacing felt filter material is that operation can cause dust hardened under grey membrane filtration, low-temperature condition, increases operation
Pressure difference.In view of the limitation that Nomex non-woven fabrics is used, therefore determine to use metal filtrate.Weaving metallic fibers filter material surface light
It is sliding, reach the degree of surface filtration.The use of acupuncture lacing felt filter material can be largely overcome using weaving metallic fibers filtrate
Limitation.Easily there is hardened phenomenon, preferably filter bag material in dust-collecting bag during coal gas dust removal is pressed for batch can, it is considered to adopt
As secondary fine dust removal installation it is relatively reasonable scheme with metal filtrate sack cleaner.
The advantage of the invention is that：Solve pressure vessel coal gas in traditional ironmaking technology to empty emission problem, realize
Low stain, low emission, improve environment；Alleviate impact of the air-flow to sack cleaner significantly by relevant apparatus, extend
Equipment life；Solve the problem of sack cleaner impurity screening is deposited in bottom.
Brief description of the drawings
Fig. 1 is present apparatus pressure-equalizing and discharging process flow chart.Wherein, pressure vessel 1, stop valve 1, diffusion valve 3, whirlwind are removed
Dirt device 4, stop valve 25, sack cleaner 6, equalizing valve 7, stop valve 38, orifice plate 9, safety valve 10, equal pressurized air source 11, coal gas
Discharge tube 12.
Embodiment
Embodiment 1
A kind of coal gas pressure-equalizing bleeding device of the multistage dedusting of pressure vessel, including pressure-equalizing device, bleeding device and safety dress
Put three parts；Pressure-equalizing device is by equal pressurized air source 11, equalizing valve 7, sack cleaner 6, stop valve 25, cyclone dust collectors 4, cut-out
Valve 1 and pressure vessel 1 are in series composition, and equalizing valve 7 is provided between equal pressurized air source 11 and sack cleaner 6, is removed in cloth bag
Stop valve 25 is provided between dirt device 6 and cyclone dust collectors 4, stop valve one is provided between cyclone dust collectors 4 and pressure vessel 1
2；Bleeding device is by pressure vessel 1, diffusion valve 3, cyclone dust collectors 4, stop valve 25, sack cleaner 6, stop valve 38, hole
Plate 9 and coal gas discharge tube 12 are in series composition, diffusion valve 3 are provided between pressure vessel 1 and cyclone dust collectors 4, in whirlwind
Stop valve 25 is provided between deduster 4 and sack cleaner 6, is provided with and cuts between sack cleaner 6 and coal gas discharge tube 12
Disconnected valve 38 and orifice plate 9；Safety device is in series and constituted by pressure vessel 1, safety valve 10 and coal gas discharge tube 12, safety dress
Put and safety valve 10 is provided between pressure vessel 1 and coal gas discharge tube 12；
A kind of application method of the coal gas pressure-equalizing bleeding device of the multistage dedusting of pressure vessel, its specific steps and parameter are such as
Under：
1st, press：Diffusion valve 3 and stop valve 38 are closed, stop valve 1, stop valve 25 and equalizing valve 7 is opened, calms the anger
Source 11 enters pressure vessel 1 through equalizing valve 7, sack cleaner 6, stop valve 25, cyclone dust collectors 4 and stop valve 1,
While the dust saved bit by bit in sack cleaner 6 and cyclone dust collectors 4 is blown back pressure vessel 1 by pressurized air source 11, make pressure vessel 1
Default equalizing pressure 0.25MPa is reached, uniform voltage function is realized, equalizing valve 7 and stop valve 1 is then shut off.
2nd, diffuse：After the completion of pressing, the coal gas warp in bleeding device, stop valve 38 and diffusion valve 3, pressure vessel 1 is opened
Diffusion valve 3, cyclone dust collectors 4, stop valve 25, sack cleaner 6, stop valve 38 and orifice plate 9 enter coal gas row after filtering
Pipeline 12 is put, when the pressure in pressure vessel 1 reaches preset pressure 0MPa, diffusion function is realized, is then shut off the He of diffusion valve 3
Stop valve 38.During this is diffused, cyclone dust collectors 4 are one-time dedusting, and sack cleaner 6 is final dusting.The process
Middle sack cleaner 6 uses metal filtrate sack cleaner, the Bag filter area suitable by accurately calculating；Metal filtrate
Sack cleaner can solve the pressure difference ability that conventional cloth bag deduster bears it is small, it is hardened the problems such as；It substantially prolongs bag-type dust
The life-span of device.
3rd, when the pressure in pressure vessel 1 is instantaneously more than setting safe pressure upper limit 0.3MPa, open after safety device
Gas in pressure vessel 1 is discharged into coal gas discharge tube 12 through safety valve 10, realizes security function.
With 3000m3Exemplified by blast fumance technique, the annual impurity quality discharged less to air is calculated.
The life-span of existing sack cleaner 6, general 3000m can also be extended by the present invention3Level blast furnace crude gas unloads ash
Sack cleaner in system averagely changes 7 cloth bags for 3 days, and the price of each cloth bag is about 50 yuan, and the funds of 1 year about need 40833
Member, equipment life can be greatlyd save by the present invention, and 7 cloth bags are changed within about 20 days through adjusting, every year can 34708 yuan of reduction of expenditure.
Claims (5)
1. the coal gas pressure-equalizing bleeding device of the multistage dedusting of a kind of pressure vessel, it is characterised in that including pressure-equalizing device, bleeding device
And the part of safety device three；Pressure-equalizing device by equal pressurized air source (11), equalizing valve (7), sack cleaner (6), stop valve two (5),
Cyclone dust collectors (4), stop valve one (2) and pressure vessel (1) are in series composition, in equal pressurized air source (11) and sack cleaner
(6) equalizing valve (7) is provided between, stop valve two (5) is provided between sack cleaner (6) and cyclone dust collectors (4), in whirlwind
Stop valve one (2) is provided between deduster (4) and pressure vessel (1)；Bleeding device is by pressure vessel (1), diffusion valve (3), rotation
Wind deduster (4), stop valve two (5), sack cleaner (6), stop valve three (8), orifice plate (9) and coal gas discharge tube (12) phase
It is composed in series, diffusion valve (3) is provided between pressure vessel (1) and cyclone dust collectors (4), in cyclone dust collectors (4) and cloth bag
Stop valve two (5) is provided between deduster (6), stop valve is provided between sack cleaner (6) and coal gas discharge tube (12)
Three (8) and orifice plate (9)；Safety device is in series and constituted by pressure vessel (1), safety valve (10) and coal gas discharge tube (12),
Safety device is provided with safety valve (10) between pressure vessel (1) and coal gas discharge tube (12)；When pressing, bleeding device is closed
In diffusion valve (3), stop valve three (8), open pressure-equalizing device in stop valve one (2), stop valve two (5), equalizing valve (7),
Equal pressurized air source (11) enters pressure vessel (1) through sack cleaner (6), cyclone dust collectors (4), realizes uniform voltage function；Diffuse
When, stop valve three (8), stop valve two (5), the diffusion valve (3) of bleeding device are opened, coal gas is removed through cyclone dust collectors (4), cloth bag
Coal gas discharge tube (12) is entered after dirt device (6) filtering, diffusion function is realized；When the pressure in pressure vessel (1) is instantaneously big
When the safe pressure upper limit is set, open the gas after safety device in pressure vessel (1) and be discharged into coal gas through safety valve (10)
In discharge tube (12), security function is realized.
2. the application method of the device described in a kind of claim 1, it is characterised in that specific steps and parameter are as follows：
1) press：Diffusion valve (3) and stop valve three (8) are closed, stop valve one (2), stop valve two (5) and equalizing valve (7) is opened,
Equal pressurized air source (11) is through equalizing valve (7), sack cleaner (6), stop valve two (5), cyclone dust collectors (4) and stop valve one (2)
Pressure vessel (1) is entered, equal pressurized air source (11) blows back the dust saved bit by bit in sack cleaner (6) and cyclone dust collectors (4)
While pressure vessel (1), pressure vessel (1) is reached default equalizing pressure, realize uniform voltage function, be then shut off equalizing valve
And stop valve one (2) (7)；
2) diffuse：After the completion of pressing, the coal gas in bleeding device, stop valve three (8) and diffusion valve (3), pressure vessel (1) is opened
Through diffusion valve (3), cyclone dust collectors (4), stop valve two (5), sack cleaner (6), stop valve three (8) and orifice plate (9) filtering
After enter coal gas discharge tube (12), when the pressure in pressure vessel (1) reaches preset pressure 0MPa, realization diffuse work(
Can, it is then shut off diffusion valve (3) and stop valve three (8)；
3) when the pressure in pressure vessel (1) is instantaneously more than the setting safe pressure upper limit, pressure vessel after safety device is opened
(1) gas in is discharged into coal gas discharge tube (12) through safety valve (10), realizes security function.
3. method according to claim 2, it is characterised in that step 1) and 3) in pressure vessel (1) preset pressure be
0.2MPa~0.3MPa.
4. method according to claim 2, it is characterised in that step 2) diffuse during, cyclone dust collectors (4) are one
Secondary dedusting, sack cleaner (6) is final dusting.
5. method according to claim 2, it is characterised in that step 2) diffuse during, sack cleaner (6) essence is removed
Dustiness after dirt is 2~5mg/Nm3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710461724.XA CN107326134A (en) | 2017-06-17 | 2017-06-17 | The coal gas pressure-equalizing bleeding device and its application method of pressure vessel multistage dedusting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710461724.XA CN107326134A (en) | 2017-06-17 | 2017-06-17 | The coal gas pressure-equalizing bleeding device and its application method of pressure vessel multistage dedusting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107326134A true CN107326134A (en) | 2017-11-07 |
Family
ID=60195318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710461724.XA Pending CN107326134A (en) | 2017-06-17 | 2017-06-17 | The coal gas pressure-equalizing bleeding device and its application method of pressure vessel multistage dedusting |
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| US20110265652A1 (en) * | 2008-05-27 | 2011-11-03 | Synthesis Engery Systems, Inc | Dust Removal Method Using Baghouse Filters And Dust Removal Apparatus Therefor |
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| CN206887142U (en) * | 2017-06-17 | 2018-01-16 | 北京首钢国际工程技术有限公司 | The coal gas pressure-equalizing bleeding device of pressure vessel multistage dedusting |
-
2017
- 2017-06-17 CN CN201710461724.XA patent/CN107326134A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110265652A1 (en) * | 2008-05-27 | 2011-11-03 | Synthesis Engery Systems, Inc | Dust Removal Method Using Baghouse Filters And Dust Removal Apparatus Therefor |
| CN101724722A (en) * | 2009-12-30 | 2010-06-09 | 中冶赛迪工程技术股份有限公司 | Blast-furnace pressure-discharging gas recovering device and method |
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| CN205062095U (en) * | 2015-10-29 | 2016-03-02 | 中冶华天南京工程技术有限公司 | Blast furnace furnace roof material jar diffuses gas purifying, recovery system |
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| CN206887142U (en) * | 2017-06-17 | 2018-01-16 | 北京首钢国际工程技术有限公司 | The coal gas pressure-equalizing bleeding device of pressure vessel multistage dedusting |
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Application publication date: 20171107 |
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