CN206887142U - The coal gas pressure-equalizing bleeding device of pressure vessel multistage dedusting - Google Patents
The coal gas pressure-equalizing bleeding device of pressure vessel multistage dedusting Download PDFInfo
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- CN206887142U CN206887142U CN201720708193.5U CN201720708193U CN206887142U CN 206887142 U CN206887142 U CN 206887142U CN 201720708193 U CN201720708193 U CN 201720708193U CN 206887142 U CN206887142 U CN 206887142U
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Abstract
A kind of coal gas pressure-equalizing bleeding device of pressure vessel multistage dedusting, belongs to metallurgical engineering ironmaking technology field.Including pressure-equalizing device, bleeding device and safety device three parts；Pressure-equalizing device is composed in series by equal pressurized air source, equalizing valve, sack cleaner, cyclone dust collectors and pressure vessel etc.；Bleeding device is in series by diffusion valve, cyclone dust collectors, sack cleaner, orifice plate and coal gas discharge tube etc. and formed；Safety device is composed in series by safety valve and coal gas discharge tube etc.；When pressing, bleeding device is closed, unlatching pressure-equalizing device is realized and pressed；When diffusing, bleeding device is opened, when the pressure in pressure vessel is instantaneously more than setting safe pressure upper limit 0.3MPa~0.32MPa, safety device is opened and realizes security function.Advantage is, pollutes and discharges low, improvement environment, extension device service life.
Description
Technical field
The utility model belongs to metallurgical engineering ironmaking technology field, more particularly to a kind of coal gas of pressure vessel multistage dedusting
Pressure-equalizing bleeding device.
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, the raw coke oven gas dustiness about 20~30g/Nm being drained into 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：
1. if 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.
2. if refined dedusting device sack cleaner is provided with the coal gas pressure-equalizing and discharging process of the pressure vessel, due to discharging wink
When pressure it is big, the characteristics of time is short, easily cause 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 utility model will effectively solve conventional pressure vessel pressure-equalizing and discharging dress
Put the problem of existing.
The content of the invention
The purpose of this utility model is to provide a kind of coal gas pressure-equalizing bleeding device of pressure vessel multistage dedusting, solved
Pressure vessel coal gas pressure-equalizing and discharging pollution height, refined dedusting device sack cleaner rapid wear in traditional ironmaking technology, susceptible to plugging ask
Topic.Realize low emission, improve environment, and extend the life-span of refined dedusting device sack cleaner.
A kind of coal gas pressure-equalizing bleeding device of pressure vessel multistage dedusting, 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, stop valve 1, the stop valve in pressure-equalizing device are opened
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, the stop valve 38, stop valve 25 and diffusion valve 3 of bleeding device are opened, coal gas removes 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 pressure vessel multistage dedusting, 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
Reach default equalizing pressure 0.2MPa~0.3MPa, realize uniform voltage function, be then shut off equalizing valve 7 and stop valve 1.
2nd, diffuse：After the completion of pressing, bleeding device is opened, stop valve 38 and diffusion valve 3, the coal gas warp in pressure vessel 1
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, and cyclone dust collectors 4 play cushioning effect；Orifice plate 9 during this can effectively reduce sack cleaner
The pressure difference of 6 inlet and outlet, so as to reduce impact of the emission coal gas to cloth bag in sack cleaner 6；Sack cleaner 6 during this
By accurately calculating suitable Bag filter area；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 the pressure difference ability that conventional cloth bag deduster is born is small, hardened etc. asks
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 bag-type dusting is substantially Nomex non-woven fabrics at present, in its suitable temperature model
It is good to enclose interior long-term work dust removing effects.But its use has certain limitation, and a pressure difference being subject to is small, what most of filtrates were born
Within 7~8kPa, pressure difference crosses conference to be made ultrafine dust alternate big pressure difference operation also will be big through filtrate and filter pressure difference
It is big to reduce life-span of filtering material.Second, acupuncture lacing felt filter material is grey membrane filtration, being run under low-temperature condition can cause dust hardened, increase operation
Pressure difference.In view of the limitation that Nomex non-woven fabrics uses, 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, considers to adopt
By the use of metal filtrate sack cleaner as secondary fine dust removal installation be relatively reasonable scheme.
The utility model has the advantage of：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, prolong
Equipment life is grown；Solve the problems, such as that 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 remove
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 pressure vessel multistage dedusting, 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 formed 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 pressure vessel multistage dedusting, 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
Reach default equalizing pressure 0.25MPa, realize uniform voltage function, be then shut off equalizing valve 7 and stop valve 1.
2nd, diffuse：After the completion of pressing, bleeding device is opened, stop valve 38 and diffusion valve 3, the coal gas warp in pressure vessel 1
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, by accurately calculating suitable Bag filter area；Metal filtrate
Sack cleaner can solve the problems such as pressure difference ability that conventional cloth bag deduster is born is small, hardened；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, after opening 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 impurity quality discharged less to air every year is calculated.
The life-span of existing sack cleaner 6, general 3000m can also be extended by the utility model3Level blast furnace crude gas
Sack cleaner in ash discharging system changes 7 cloth bags in average 3 days, and the price of each cloth bag is about 50 yuan, and the funds of 1 year about need
40833 yuan, equipment life can be greatlyd save by the utility model, 7 cloth bags are changed through adjusting about 20 days, every year can reduction of expenditure
34708 yuan.
Claims (1)
1. a kind of coal gas pressure-equalizing bleeding device of pressure vessel multistage dedusting, it is characterised in that including pressure-equalizing device, bleeding device
And safety device three parts；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 formed 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720708193.5U CN206887142U (en) | 2017-06-17 | 2017-06-17 | The coal gas pressure-equalizing bleeding device of pressure vessel multistage dedusting |
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| CN201720708193.5U CN206887142U (en) | 2017-06-17 | 2017-06-17 | The coal gas pressure-equalizing bleeding device of pressure vessel multistage dedusting |
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| CN206887142U true CN206887142U (en) | 2018-01-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326134A (en) * | 2017-06-17 | 2017-11-07 | 北京首钢国际工程技术有限公司 | The coal gas pressure-equalizing bleeding device and its application method of pressure vessel multistage dedusting |
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- 2017-06-17 CN CN201720708193.5U patent/CN206887142U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326134A (en) * | 2017-06-17 | 2017-11-07 | 北京首钢国际工程技术有限公司 | The coal gas pressure-equalizing bleeding device and its application method of pressure vessel multistage dedusting |
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