CN107284883A - A kind of batch (-type) lock hopper pressurization pulverized coal conveying device and carrying method - Google Patents
A kind of batch (-type) lock hopper pressurization pulverized coal conveying device and carrying method Download PDFInfo
- Publication number
- CN107284883A CN107284883A CN201710592568.0A CN201710592568A CN107284883A CN 107284883 A CN107284883 A CN 107284883A CN 201710592568 A CN201710592568 A CN 201710592568A CN 107284883 A CN107284883 A CN 107284883A
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- Prior art keywords
- lock hopper
- valve
- fine coal
- hopper
- lock
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- 239000003245 coal Substances 0.000 title claims abstract description 158
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000006835 compression Effects 0.000 claims abstract description 20
- 238000007906 compression Methods 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 238000005243 fluidization Methods 0.000 claims description 2
- 230000001934 delay Effects 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 241000273930 Brevoortia tyrannus Species 0.000 description 21
- 238000005516 engineering process Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 238000002309 gasification Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/72—Fluidising devices
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/50—Fuel charging devices
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2200/00—Details of gasification apparatus
- C10J2200/15—Details of feeding means
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
A kind of batch (-type) lock hopper pressurization pulverized coal conveying device and carrying method, including fine coal surge bunker, lock hopper and fine coal feed hopper；Valve is provided between fine coal surge bunker and lock hopper, between lock hopper and fine coal feed hopper；Lock hopper compression system is connected with lock hopper；It is characterized in that：Also include fine coal deduster；Metal sintered filter and control valve are provided between lock hopper and fine coal deduster；Balanced valve is provided between lock hopper and fine coal feed hopper；Relief valve is provided between lock hopper and fine coal deduster；Lock hopper compression system is connected with the pipeline between metal sintered filter and control valve.Metal sintered filter is solved the problem of causing to take fine coal out of because of top pressure release during lock hopper breaks bridge, and is reduced lock hopper and broken abrasion of the fine coal taken out of of bridge to valve.Lock hopper uses multichannel pressure release step by step, solves the problems, such as lock hopper pipeline vibration caused by quick pressure releasing, and the conveying device is simple in construction, and carrying method technique is easily operated, suitable for popularization and application.
Description
Technical field
The invention belongs to coal chemical technology, more particularly to a kind of batch (-type) lock hopper pressurization pulverized coal conveying device and conveying side
Method.
Background technology
Coal gasification course, into pulverized coal particle, the conjunction easy to process utilized is converted into through gasification furnace mainly by Coal dressing
Into the process of gas and associated fuel gas.Fine coal conveying technology is one of its key technology, fine coal raw material in whole process
Whether conveying will smoothly directly affect conversion and the treatment effeciency of gasification furnace, while the stability and security of the system of influence.
Currently, use inert gas for power convey fine coal mode be it is most common also with rate highest technology it
One, SHELL technologies are common are, another is exactly the solid pump conveying technology of currently pilot development.
Lock hopper is that most common equipment is applied in coal chemical industry, especially the fine coal and cinder Geldart-D particle in some pressurizations
Had a wide range of applications in system.Lock hopper is typically mounted between non-pressure vessel and pressurizing vessel.Lock hopper execution work is mainly
Receive fine coal storage fine coal, then it is pressurized after be delivered to downstream, then again to lock hopper carry out pressure release.It is most common in lock hopper work
The problem of be lock hopper bridge formation problem, this mainly has very big pass with fine coal total amount size, fine coal water content and pulverized coal particle size etc.
System, the compactions of how much influence lock hopper tapering fine coal of lock hopper discharging opening top coal amount, in addition the pressurising position of lock hopper
Selection is improper also to influence the compaction of lock hopper tapering fine coal.Lock hopper, which is built bridge, directly affects the stable operation of gasification installation.
The content of the invention
It is an object of the invention to provide a kind of method of the intermittent pressurized delivered fine coal of lock hopper, the method solves fine coal lock
Struggle against to feed hopper blanking it is not smooth the problem of.
Batch (-type) lock hopper of the present invention is pressurizeed pulverized coal conveying device, including be sequentially connected fine coal surge bunker, lock hopper
With fine coal feed hopper；Valve is provided between the fine coal surge bunker and lock hopper, between lock hopper and fine coal feed hopper；The lock
Lock hopper compression system is connected with bucket；Also include fine coal deduster；It is sequentially connected and sets between the lock hopper and fine coal deduster
It is equipped with metal sintered filter and control valve；Balanced valve is provided between the lock hopper and fine coal feed hopper；The lock hopper and powder
Relief valve is provided between coal deduster；The lock hopper compression system and the pipeline phase between metal sintered filter and control valve
Connection.Fine coal is filtered under high pressure by the metal sintered filter of setting, not only solve lock hopper break bridge in because
The problem of top pressure release causes to take fine coal out of, and reduce lock hopper and break abrasion of the fine coal taken out of of bridge to valve.
Batch (-type) lock hopper pressurization pulverized coal conveying device of the present invention, the relief valve is set side by side with several.
Batch (-type) lock hopper pressurization pulverized coal conveying device of the present invention, the relief valve is set side by side with three, passed through
Multichannel pressure release step by step, solves the problems, such as lock hopper pipeline vibration caused by quick pressure releasing.
Batch (-type) lock hopper pressurization pulverized coal conveying device of the present invention, the broken bridge that the control valve includes setting gradually is cut
Disconnected valve and broken bridge voltage-controlled valve.
Batch (-type) lock hopper pressurization pulverized coal conveying device of the present invention, the fine coal surge bunker and low-pressure nitrogen system phase
Connect；The low-pressure nitrogen system is provided with fluidized gas stop valve with fine coal surge bunker part.
Between batch (-type) lock hopper pressurization pulverized coal conveying device of the present invention, lock hopper and the lock hopper compression system side by side
It is provided with the pressurizing valve of lock hopper first and the pressurizing valve of lock hopper second.
Batch (-type) lock hopper pressurization pulverized coal conveying device of the present invention, the fine coal feed hopper pressurizes through fine coal feed hopper
Valve is connected with fine coal feed hopper compression system.
Batch (-type) lock hopper pressurization pulverized coal conveying device of the present invention, sets successively between the fine coal surge bunker and lock hopper
It is equipped with fine coal surge bunker baiting valve, lock hopper inlet valve；Lock hopper baiting valve is provided between the lock hopper and fine coal feed hopper.
Batch (-type) lock hopper pressurization pulverized coal conveying device of the present invention, the lock hopper compression system pressurizes through lock hopper the 3rd
Pipeline after valve between metal sintered filter and control valve is connected.
Batch (-type) lock hopper pressurization fine coal carrying method of the present invention, comprises the following steps：
1）Fine coal surge bunker inlet valve, lock hopper inlet valve are opened using the mobility of gravity and fine coal by the powder of fine coal surge bunker
Coal is lowered into fine coal lock hopper；
2）Fine coal surge bunker inlet valve, lock hopper inlet valve are closed, the pressurizing valve of lock hopper second, the pressurizing valve of lock hopper the 3rd is opened, works as lock
Bucket second is opened the pressurizing valve of lock hopper first when pressurizeing valve opening more than 95% and pressurizeed to lock hopper again；
3）Closed when fine coal lock hopper and fine coal feed hopper pressure difference are close to 50KPa the pressurizing valve of lock hopper the 3rd, the pressurizing valve of lock hopper second,
The pressurizing valve of lock hopper first；
4）Treat that fine coal feed hopper stuff level switch is low to give the correct time, balanced valve is opened after opening lock hopper baiting valve；
5）Given the correct time if lock hopper stuff level switch is not low in 2min, perform lock hopper and break bridge program, closed after balanced valve and open broken bridge
Broken bridge stop valve, broken bridge voltage-controlled valve on line, bridge stop valve, broken bridge are closed brokenly when lock hopper pressure reduces 30-100KPa immediately
Voltage-controlled valve, and balanced valve is opened, if waiting the not low report of lock hopper stuff level switch after 2min, continue executing with brokenly bridge program；
6）If the low report of lock hopper stuff level switch, simultaneously closes off lock hopper baiting valve, balanced valve in 2min；
7）The relief valve being set up in parallel between lock hopper and fine coal deduster is opened successively, is depressurized step by step；
8）Treat that lock hopper pressure is down to normal pressure, open fine coal surge bunker baiting valve and fed to lock hopper, and repeat above step 1-7.
Batch (-type) lock hopper pressurization pulverized coal conveying device and carrying method of the present invention, by changing to existing process
Enter, broken bridge stop valve is added on the broken bridge line of lock hopper and broken bridge voltage-controlled valve solves pressure oscillation when lock hopper breaks bridge and caused greatly into coal
The problem of amount fluctuation is big.Metal sintered filter is added to not only solve in lock hopper breaks bridge because top pressure release causes to take powder out of
The problem of coal, and reduce lock hopper and break abrasion of the fine coal taken out of of bridge to valve.Lock hopper uses multichannel pressure release step by step, solves
Lock hopper pipeline vibration problem caused by quick pressure releasing, and conveying device described in this law is simple in construction, carrying method technique is easy
In operation, suitable for popularization and application.
Brief description of the drawings
Fig. 1 is batch (-type) lock hopper of the present invention pressurization pulverized coal conveying device and carrying method schematic flow sheet；
Wherein 1- low-pressure nitrogens system, 2- fluidized gas stop valve, 3- fine coal surge bunker, 4- break bridge stop valve, 5- break bridge voltage-controlled valve,
6- fine coal surge bunkers baiting valve, the relief valve of 7- lock hoppers second, 8- fine coal deduster, 9- metal sintered filters, 10- lock hoppers first
Relief valve, the relief valve of 11- lock hoppers the 3rd, 12- lock hoppers inlet valve, the pressurizing valve of 13- lock hoppers first, 14- lock hoppers compression system, 15-
Lock hopper, the pressurizing valve of 16- lock hoppers second, 17- balanced valves, 18- lock hoppers baiting valve, 19- fine coal feed hopper, 20- fine coal feed hoppers add
Pressure valve, the pressurizing valve of 21- lock hoppers the 3rd, 22- fine coal feed hopper compression systems.
Embodiment
Below in conjunction with the accompanying drawings and embodiment is pressurizeed pulverized coal conveying device and carrying method to batch (-type) lock hopper of the present invention
It is described in detail.
Batch (-type) lock hopper pressurization pulverized coal conveying device of the present invention, as shown in figure 1, delaying including the fine coal being sequentially connected
Rush storehouse 3, lock hopper 15 and fine coal feed hopper 19；Between the fine coal surge bunker 3 and lock hopper 15, lock hopper 15 and fine coal feed hopper 19 it
Between be provided with valve；Lock hopper compression system 14 is connected with the lock hopper 15；Also include fine coal deduster 8；The lock hopper
It is sequentially connected between 15 and fine coal deduster 8 and is provided with metal sintered filter 9 and control valve；Control valve includes what is set gradually
Broken bridge stop valve 4 and broken bridge voltage-controlled valve 5.Balanced valve 17 is provided between the lock hopper 15 and fine coal feed hopper 19；The lock hopper
Relief valve is provided between 15 and fine coal deduster 8；The relief valve is set side by side with three.With gas in pressure leak process
The fine coal gone out can effectively be filtered by fine coal deduster 8, it is to avoid cause environmental pollution；The lock hopper compression system 14 with
Pipeline between metal sintered filter 9 and control valve is connected, and the fine coal surge bunker 3 is connected with low-pressure nitrogen system 1；
The low-pressure nitrogen system 1 is provided with fluidized gas stop valve 2 with fine coal surge bunker 3.The lock hopper 15 and lock hopper compression system
The first pressurizing valve of lock hopper 13 and the second pressurizing valve of lock hopper 16 are set side by side between 14.The fine coal feed hopper 19 is fed through fine coal
Storehouse pressurizing valve 20 is connected with fine coal feed hopper compression system 22.It is disposed between the fine coal surge bunker 3 and lock hopper 15
Fine coal surge bunker baiting valve 6, lock hopper inlet valve 12；Lock hopper baiting valve is provided between the lock hopper 15 and fine coal feed hopper 19
18.Pipeline of the lock hopper compression system 14 after the pressurizing valve 21 of lock hopper the 3rd between metal sintered filter 9 and control valve
It is connected.
Using the fine coal carrying method of above-mentioned batch (-type) lock hopper pressurization pulverized coal conveying device, following steps are specifically included：
1）The inlet valve of fine coal surge bunker 3, lock hopper inlet valve 12 are opened using the mobility of gravity and fine coal by fine coal surge bunker 3
Fine coal be lowered into fine coal lock hopper 15；
2）The inlet valve of fine coal surge bunker 3, lock hopper inlet valve 12 are closed, the second pressurizing valve of lock hopper 16, the pressurizing valve of lock hopper the 3rd is opened
21, when the aperture of the second pressurizing valve of lock hopper 16 is more than 95% the first pressurizing valve of lock hopper 13 is opened again pressurizeed to lock hopper 15；
3）The pressurizing valve 21 of lock hopper the 3rd, lock hopper second are closed when fine coal lock hopper 15 and the pressure difference of fine coal feed hopper 19 are close to 50KPa
Pressurizing valve 16, the first pressurizing valve of lock hopper 13；
4）Treat that the stuff level switch of fine coal feed hopper 19 is low to give the correct time, open and balanced valve 17 is opened after lock hopper baiting valve 18；
5）Given the correct time if the stuff level switch of lock hopper 15 is not low in 2min, perform lock hopper 15 and break bridge program, beaten after closing balanced valve 17
Broken bridge stop valve 4, broken bridge voltage-controlled valve 5 on bridge line are opened brokenly, bridge is closed brokenly immediately when the pressure of lock hopper 15 reduces 30-100KPa and cuts
Disconnected valve 4, broken bridge voltage-controlled valve 5, and balanced valve 17 is opened, if waiting the not low report of the stuff level switch of lock hopper 15 after 2min, continue to hold
The broken bridge program of row；
6）If the low report of the stuff level switch of lock hopper 15, simultaneously closes off lock hopper baiting valve 18, balanced valve 17 in 2min；
7）Open the relief valve being set up in parallel between lock hopper 15 and fine coal deduster 8 successively, be followed successively by the first relief valve of lock hopper 10,
The second relief valve of lock hopper 7 and the relief valve 11 of lock hopper the 3rd, are depressurized step by step；
8）Treat that the pressure of lock hopper 15 is down to normal pressure, open fine coal surge bunker baiting valve 6 and fed to lock hopper 15, and repeat above step 1-
7。
In the above-mentioned methods, first unlocked when being pressurizeed the second pressurizing valve 16 of bucket to lock hopper 15, make the tapering fine coal fluidisation of lock hopper 15,
And avoiding top compression causes the compacting of fine coal, it is ensured that the blanking of lock hopper 15 is unobstructed.At lock hopper 15 using multichannel step by step
Pressure release, it is to avoid the pipeline vibration caused by quick pressure releasing of lock hopper 15 occurs；When lock hopper 15 breaks bridge, the pressure of lock hopper 15 reduces 30-
100KPa, destroys the structure that fine coal is built bridge in lock hopper 15, it is thus also avoided that the fine coal Feedstock fluctuation caused by pressure release is excessive.Simultaneously
The pressurizing valve 21 of lock hopper the 3rd is opened during being pressurizeed to lock hopper 15, i.e., metal sintered filter 9 is purged, given again
Lock hopper 15 has carried out punching press.
Claims (10)
- The pulverized coal conveying device 1. a kind of batch (-type) lock hopper is pressurizeed, including the fine coal surge bunker being sequentially connected（3）, lock hopper（15）And powder Coal feed hopper（19）；The fine coal surge bunker（3）With lock hopper（15）Between, lock hopper（15）With fine coal feed hopper（19）Between be all provided with It is equipped with valve；The lock hopper（15）On be connected with lock hopper compression system（14）；It is characterized in that：Also include fine coal deduster （8）；The lock hopper（15）With fine coal deduster（8）Between be sequentially connected and be provided with metal sintered filter（9）And control valve；Institute State lock hopper（15）With fine coal feed hopper（19）Between be provided with balanced valve（17）；The lock hopper（15）With fine coal deduster（8）It Between be provided with relief valve；The lock hopper compression system（14）With metal sintered filter（9）Pipeline between control valve is connected It is logical.
- The pulverized coal conveying device 2. batch (-type) lock hopper according to claim 1 is pressurizeed, it is characterised in that：The relief valve is arranged side by side It is provided with several.
- The pulverized coal conveying device 3. batch (-type) lock hopper according to claim 1 or 2 is pressurizeed, it is characterised in that：The relief valve It is set side by side with three.
- The pulverized coal conveying device 4. batch (-type) lock hopper according to claim 3 is pressurizeed, it is characterised in that：The control valve includes The broken bridge stop valve set gradually（4）With broken bridge voltage-controlled valve（5）.
- The pulverized coal conveying device 5. batch (-type) lock hopper according to claim 4 is pressurizeed, it is characterised in that：The fine coal surge bunker （3）With low-pressure nitrogen system（1）It is connected；The low-pressure nitrogen system（1）With fine coal surge bunker（3）Part is provided with fluidisation autogenous cutting Disconnected valve（2）.
- The pulverized coal conveying device 6. batch (-type) lock hopper according to claim 5 is pressurizeed, it is characterised in that：The lock hopper（15）With Lock hopper compression system（14）Between be set side by side with the pressurizing valve of lock hopper first（13）With the pressurizing valve of lock hopper second（16）.
- The pulverized coal conveying device 7. batch (-type) lock hopper according to claim 6 is pressurizeed, it is characterised in that：The fine coal feed hopper （19）Through fine coal feed hopper pressurizing valve（20）With fine coal feed hopper compression system（22）It is connected.
- The pulverized coal conveying device 8. batch (-type) lock hopper according to claim 7 is pressurizeed, it is characterised in that：The fine coal surge bunker （3）With lock hopper（15）Between be disposed with fine coal surge bunker baiting valve（6）, lock hopper inlet valve（12）；The lock hopper（15）With Fine coal feed hopper（19）Between be provided with lock hopper baiting valve（18）.
- The pulverized coal conveying device 9. batch (-type) lock hopper according to claim 8 is pressurizeed, it is characterised in that：The lock hopper compression train System（14）Through the pressurizing valve of lock hopper the 3rd（21）Afterwards with metal sintered filter（9）Pipeline between control valve is connected.
- The fine coal carrying method 10. a kind of batch (-type) lock hopper is pressurizeed, it is characterised in that comprise the following steps：1）Open fine coal surge bunker（3）Inlet valve, lock hopper inlet valve（12）Mobility using gravity and fine coal delays fine coal Rush storehouse（3）Fine coal be lowered into fine coal lock hopper（15）In；2）Close fine coal surge bunker（3）Inlet valve, lock hopper inlet valve（12）, open the pressurizing valve of lock hopper second（16）, lock hopper the 3rd Pressurizing valve（21）, when the pressurizing valve of lock hopper second（16）Aperture opens the pressurizing valve of lock hopper first again when being more than 95%（13）To lock hopper （15）Pressurization；3）When fine coal lock hopper（15）With fine coal feed hopper（19）Pressure difference close to during 50KPa close the pressurizing valve of lock hopper the 3rd（21）, lock Struggle against the second pressurizing valve（16）, the pressurizing valve of lock hopper first（13）；4）Treat fine coal feed hopper（19）Stuff level switch is low to give the correct time, and opens lock hopper baiting valve（18）After open balanced valve（17）；5）If lock hopper in 2min（15）Stuff level switch is not low to give the correct time, then performs lock hopper（15）Broken bridge program, closes balanced valve （17）The broken bridge stop valve on broken bridge line is opened afterwards（4）, broken bridge voltage-controlled valve（5）, work as lock hopper（15）When pressure reduces 30-100KPa Broken bridge stop valve is closed immediately（4）, broken bridge voltage-controlled valve（5）, and open balanced valve（17）If waiting lock hopper after 2min（15）Material position The not low report of switch, then continue executing with brokenly bridge program；6）If lock hopper in 2min（15）The low report of stuff level switch, then simultaneously close off lock hopper baiting valve（18）, balanced valve（17）；7）Lock hopper is opened successively（15）With fine coal deduster（8）Between the relief valve that is set up in parallel, depressurize step by step；8）Treat lock hopper（15）Pressure is down to normal pressure, opens fine coal surge bunker baiting valve（6）To lock hopper（15）It is more than charging, and repetition Step 1-7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710592568.0A CN107284883B (en) | 2017-07-19 | 2017-07-19 | Intermittent lock hopper pressurized pulverized coal conveying device and conveying method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710592568.0A CN107284883B (en) | 2017-07-19 | 2017-07-19 | Intermittent lock hopper pressurized pulverized coal conveying device and conveying method |
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| CN107284883B CN107284883B (en) | 2024-01-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108504393A (en) * | 2018-06-01 | 2018-09-07 | 山东明泉新材料科技有限公司 | Energy-efficient fine coal pressurization conveying system |
| CN114507550A (en) * | 2022-02-23 | 2022-05-17 | 新奥科技发展有限公司 | Pressure control system of pressure changing device |
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