CN209178332U - The device of autocontrol valve purge gass in a kind of fine coal pressure-flow system - Google Patents
The device of autocontrol valve purge gass in a kind of fine coal pressure-flow system Download PDFInfo
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- CN209178332U CN209178332U CN201821841705.6U CN201821841705U CN209178332U CN 209178332 U CN209178332 U CN 209178332U CN 201821841705 U CN201821841705 U CN 201821841705U CN 209178332 U CN209178332 U CN 209178332U
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- fine coal
- switch valve
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- purging
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Abstract
The utility model discloses a kind of devices of autocontrol valve purge gass in fine coal pressure-flow system, fine coal basin including conveyance conduit connection, fine coal lock hopper and fine coal feedstock vessel, first group of switch valve is set between fine coal basin and fine coal lock hopper, second group of switch valve is set between fine coal lock hopper and fine coal feedstock vessel, it is characterized in that, the device includes purge gass gas source, described first, the purging feed channel of connection gas source is respectively set in second group of switch valve, the purging feed channel includes the purging gas branch pipe of two more parallels, in the valve chamber for the either switch valve that the purging gas branch pipe is directed respectively into first group or second group switch valve；Restriction orifice and check (non-return) valve are set on the purging gas branch pipe.The utility model can effectively prevent the fine coal in switching process to enter valve valve chamber, lead to valve bite, reduce influence of the fine coal to valve, extend valve and use the time, reduce maintenance and use cost.
Description
Technical field
The utility model relates to a kind of valvings, more particularly to autocontrol valve in a kind of fine coal pressure-flow system
The purging device of air of door.
Background technique
In gasifying powder coal device, the purpose and effect of fine coal pressurization and transportation system are that the fine coal under condition of normal pressure exists
Pressurization in coal lock hopper, reach with the coal dust feeding system condition under normal condition of high voltage, and use high pressure CO2/N2Gas conveys coal
Powder, control pulverized coal flow are sent to coal burner.
The detailed process of the system are as follows: fine coal is sent into fine coal lock hopper from the fine coal basin of normal pressure, after the boosting of fine coal lock hopper again
Fine coal is sent into the fine coal feedstock vessel of high pressure.Fine coal lock hopper is alternately depressured into coal, and boosting is delivered coal, to guarantee that fine coal is fed
Tank continuously supplies fine coal under pressure about 4.7MPa (its general pressure should be 0.5~1.0MPa higher than gasification furnace pressure)
To fine coal burner.
In fine coal pressurization and transportation system, fine coal lock hopper boosts to, opening delivery pipe suitable with fine coal feed pressure tank
Fine coal is transported to fine coal feedstock vessel by the program controlled switch valve on line.In device operational process, program-controlled on feed-line is opened
Closing valve often occur leak outside fine coal, valve bite, even valve it is stuck be failure to actuate can not pulverized coal conveying, valve body, trim mill
Damage causes device to stop.Disintegrate through valve and finds to be to accumulate caused by fine coal in valve chamber.
Summary of the invention
The purpose of this utility model is to provide a kind of purge gass dresses of autocontrol valve in fine coal pressure-flow system
It sets, is able to solve the leakage fine coal, valve bite and stuck, the technical problems such as valve body, trim abrasion of program controlled switch valve, extension
Valve uses the time, reduces maintenance and use cost.
The technical solution adopted in the utility model is:
The purging device of air of autocontrol valve in a kind of fine coal pressure-flow system, the fine coal including conveyance conduit connection
First group of switch valve, fine coal lock hopper and powder is arranged in basin, fine coal lock hopper and fine coal feedstock vessel between fine coal basin and fine coal lock hopper
Second group of switch valve is set between coal feedstock vessel, which is characterized in that the device includes purge gass gas source, described first,
The purging feed channel of connection gas source is respectively set in second group of switch valve, and the purging feed channel includes opening with first or second group
Close valve in identical two more parallels of valve quantity purging gas branch pipe, the purging gas branch pipe be directed respectively into first group or
In the valve chamber of the either switch valve of second group of switch valve；Restriction orifice and check (non-return) valve are set on the purging gas branch pipe.
Further, first group of switch valve includes at least two concatenated program controlled switch valves, second group of switch valve
Including at least two concatenated program controlled switch valves.Further, pressure balance is set between the concatenated program controlled switch valve
Valve.
Preferably, program controlled switch valve is set in the purging feed channel.The control command of the program controlled switch valve and
Position feed back signal connects DCS.
Preferably, manual switch valve is set in the purging feed channel.
The purge gass gas source is high pressure CO2。
The purging device of air of autocontrol valve in the fine coal pressure-flow system, to prevent program controlled switch valve valve chamber
Interior accumulation fine coal introduces purge gass in the valve chamber of the program controlled switch valve on fine coal feed-line, increases in purge line
Restriction orifice limits purge gass flow, and increasing check (non-return) valve prevents fine coal adverse current blocking purging feed channel.In addition, the device is such as
Fruit valve purge gass come into operation always, and when valve leakage interior using appearance for a long time, purge gass may be by leak source to valve seat, ball
The heart causes to wash away, and can aggravate valve wear speed；During valve only turns on or off, under half-open half off status of the centre of sphere
Valve chamber is possible to be blown into fine coal, therefore when only valve core is in half-open half off status, coming into operation for purge gass guarantees valve chamber internal ratio
Valve intracardiac pressure is high, and fine coal is avoided to enter valve chamber, so design increases program controlled switch valve and by process control, works as main valve
Front opening purge gass are opened, purge gass is closed when main valve is closed, the running time of purge gass can be greatly reduced, even if main valve
There is micro interior leakage in door, can also reduce purge gass and wash away to the centre of sphere and valve seat.
The utility model has the advantages that in the fine coal pressure-flow system of the utility model autocontrol valve purging device of air, can
It effectivelying prevent during valve switch, fine coal enters valve valve chamber, leads to valve bite, influence of the fine coal to valve is reduced,
Extend valve and use the time, reduces maintenance and use cost.
Detailed description of the invention
The structural schematic diagram of Fig. 1 fine coal pressure-flow system device in the prior art；
The structural representation of the purging device of air of autocontrol valve in the fine coal pressure-flow system of Fig. 2 the utility model
Figure；
In figure, 1- fine coal basin, 2- fine coal lock hopper, 3- fine coal feedstock vessel, 4,5,6,7- fine coal conveying program controlled switch valve, 8,
14- purge gass hand off valve, 9,15- purge gass program controlled switch valve, 10,11,16,17- purge gass check (non-return) valve, 12,13,18,
19- purge gass restriction orifice, 20,21- equilibrated valve.
Specific embodiment
Specific embodiment of the present utility model is described in detail below, it should be noted however that this is practical new
The protection scope of type is not limited to these specific embodiments, but is determined by claims.
As shown in Figure 1, conveyance conduit connects fine coal basin 1, fine coal lock hopper 2 and fine coal in fine coal pressure-flow system
Feedstock vessel 3, is first group of switch valve, including concatenated two program controlled switch valves 4,5 between fine coal basin 1 and fine coal lock hopper 2, two
Equilibrated valve 20 is set between valve, is second group of switch valve between fine coal lock hopper 2 and fine coal feedstock vessel 3, including concatenated two
Equilibrated valve 21 is arranged between two valves for a program controlled switch valve 6,7.First by 2 pressure release of fine coal lock hopper to normal pressure, it is defeated to open fine coal
It send first group of program controlled switch valve 4,5 that the fine coal in fine coal basin 1 is transported to fine coal lock hopper 2, is then forced into fine coal lock hopper 2
When suitable with 3 pressure of fine coal feedstock vessel, open fine coal and convey second group of program controlled switch valve 6,7, the fine coal in fine coal lock hopper 2 is defeated
It is sent to fine coal feedstock vessel 3, (its general pressure should be higher than gasification furnace pressure in pressure about 4.7MPa to guarantee fine coal feedstock vessel 3
0.5~1.0MPa) under continuously by fine coal be supplied to fine coal burner.
The purging device of air of autocontrol valve in a kind of fine coal pressure-flow system, as shown in Fig. 2, including purge gass gas
Source, respectively first, second group of switch valve setting purging feed channel simultaneously connect gas source, the purging feed channel difference of two switch valve groups
Including two purging gas branch pipes in parallel, purging is imported in first, second group of fine coal conveying 4,5,6,7 valve chamber of program controlled switch valve
Gas branch pipe；Program controlled switch valve 9,15 is increased separately in the purging feed channel of two switch valve groups, coming into operation for purge gass is controlled, is blowing
Increase check (non-return) valve 10,11,16,17 on scavenging branch pipe, prevent fine coal adverse current blocking purging feed channel, increase restriction orifice 12,13,
18,19, limit purge gass flow；The switch control of program controlled switch valve 9,15 is realized in DCS sequence, when first group of fine coal of opening
The front opening purge gass program controlled switch valve 15 of program controlled switch valve 4,5 is conveyed, after closing first group of fine coal conveying program controlled switch valve 4,5
Close purge gass sequencing valve 15；When the front opening purge gass sequencing valve 9 for opening second group of fine coal conveying program controlled switch valve 6,7, close
Purge gass sequencing valve 9 is closed after closing second group of fine coal conveying program controlled switch valve 6,7, realizes that purge gass program controlled switch valve is defeated with fine coal
It send the movement of program controlled switch valve and switchs.
Specifically, purge gass are derived from technique pressurization high pressure CO2General pipeline, in high pressure CO2First, second group of switch after pipeline
The purging feed channel of valve respectively increases by one of hand off valve 8,14, increases in the purge line of fine coal conveying program controlled switch valve 6
Add check (non-return) valve 10, prevents coal dust countercurrent purge gas pipeline, cause purge line to block, can not work normally；After check (non-return) valve
Face increases restriction orifice 12, limits the flow of purge gass, prevents purge gass excessive, reduces the influence to technical process and valve.
Increase check (non-return) valve 11 in the purge line of fine coal conveying program controlled switch valve 7, prevents coal dust string purge line, cause to blow
The blocking of scavenging pipeline, can not work normally；Increase restriction orifice 13 behind check (non-return) valve, limits the flow of purge gass, prevent from blowing
Scavenging is excessive, reduces the influence to technical process and valve.Increase in the purge line of fine coal conveying program controlled switch valve 4 and stops
Inverse valve 16 prevents coal dust string purge line, causes purge line to block, can not work normally；Increase behind check (non-return) valve
Add restriction orifice 18, limit the flow of purge gass, prevent purge gass excessive, reduces the influence to technical process and valve.In powder
Coal, which conveys, increases check (non-return) valve 17 in the purge line of program controlled switch valve 5, prevent coal dust string purge line, cause purge gass
Pipeline blocking, can not work normally；Increase restriction orifice 19 behind check (non-return) valve, limits the flow of purge gass, prevent purge gass
It is excessive, reduce the influence to technical process and valve.
Instrument control valve control command and position feedback are introduced in the sequence program of DCS, pressure is first opened in sequence
The pressure balance of 4,5 front and back of fine coal conveying program controlled switch valve is kept not having before and after fine coal conveying program controlled switch valve by balanced valve 20
Fine coal conveying program controlled switch valve 4 is opened in the case where pressure difference again, finally opens fine coal conveying program controlled switch valve 5, then first closes fine coal
Conveying program controlled switch valve 5 turns off fine coal conveying program controlled switch valve 4；So use the valve opening order of equilibrated valve 20 as
The condition that purge gass program controlled switch valve 9 is opened is opened using the order for closing fine coal conveying program controlled switch valve 4 as purge gass are program-controlled
Close the condition that valve 9 is closed；Equilibrated valve 21 is first opened in sequence, by the pressure of 6,7 front and back of fine coal conveying program controlled switch valve
Balance keeps not having to open fine coal conveying program controlled switch valve 6 in the case where pressure difference again before and after fine coal conveying program controlled switch valve, finally open
Fine coal conveys program controlled switch valve 7, then first closes fine coal conveying program controlled switch valve 7, turns off fine coal conveying program controlled switch valve 6；
So the condition for using the valve opening order of equilibrated valve 21 to open as purge gass program controlled switch valve 15, using closing, fine coal is defeated
The condition for sending the order of program controlled switch valve 6 to close as purge gass program controlled switch valve 15；By these operation conditions and action command
It puts successive control system into execute, realizes required function.
Claims (6)
1. the device of autocontrol valve purge gass in a kind of fine coal pressure-flow system, the fine coal storage including conveyance conduit connection
First group of switch valve, fine coal lock hopper and fine coal is arranged in tank, fine coal lock hopper and fine coal feedstock vessel between fine coal basin and fine coal lock hopper
Second group of switch valve is set between feedstock vessel, which is characterized in that the device includes purge gass gas source, and described first,
The purging feed channel of connection gas source is respectively set in two groups of switch valves, and the purging feed channel includes switching with first or second group
The purging gas branch pipe of identical two more parallels of valve quantity in valve, the purging gas branch pipe are directed respectively into first group or
In the valve chamber of the either switch valve of two groups of switch valves；Restriction orifice and check (non-return) valve are set on the purging gas branch pipe.
2. the apparatus according to claim 1, which is characterized in that first group of switch valve includes two concatenated program-controlled
Switch valve, second group of switch valve include two concatenated program controlled switch valves.
3. the apparatus of claim 2, which is characterized in that it is flat that pressure is arranged between the concatenated program controlled switch valve
Weigh valve.
4. the apparatus according to claim 1, which is characterized in that program controlled switch valve, institute are arranged in the purging feed channel
The control command and position feed back signal for the program controlled switch valve stated connect DCS.
5. the apparatus according to claim 1, which is characterized in that manual switch valve is arranged in the purging feed channel.
6. the apparatus according to claim 1, which is characterized in that the purge gass gas source is high pressure CO2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821841705.6U CN209178332U (en) | 2018-11-09 | 2018-11-09 | The device of autocontrol valve purge gass in a kind of fine coal pressure-flow system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821841705.6U CN209178332U (en) | 2018-11-09 | 2018-11-09 | The device of autocontrol valve purge gass in a kind of fine coal pressure-flow system |
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| CN209178332U true CN209178332U (en) | 2019-07-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022071030A1 (en) * | 2020-09-29 | 2022-04-07 | 東京エレクトロン株式会社 | Powder conveyance device, gas supply device, and powder removal method |
| JP7515359B2 (en) | 2020-09-29 | 2024-07-12 | 東京エレクトロン株式会社 | Powder conveying device, gas supply device and powder removal method |
-
2018
- 2018-11-09 CN CN201821841705.6U patent/CN209178332U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022071030A1 (en) * | 2020-09-29 | 2022-04-07 | 東京エレクトロン株式会社 | Powder conveyance device, gas supply device, and powder removal method |
| JP7515359B2 (en) | 2020-09-29 | 2024-07-12 | 東京エレクトロン株式会社 | Powder conveying device, gas supply device and powder removal method |
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