CN216662977U - Double-lock-bucket high-capacity energy-saving continuous coal feeding device of high-pressure pulverized coal gasification furnace - Google Patents
Double-lock-bucket high-capacity energy-saving continuous coal feeding device of high-pressure pulverized coal gasification furnace Download PDFInfo
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- CN216662977U CN216662977U CN202220018869.9U CN202220018869U CN216662977U CN 216662977 U CN216662977 U CN 216662977U CN 202220018869 U CN202220018869 U CN 202220018869U CN 216662977 U CN216662977 U CN 216662977U
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- 239000003245 coal Substances 0.000 title claims abstract description 245
- 238000002309 gasification Methods 0.000 title claims abstract description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 146
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 67
- 238000007599 discharging Methods 0.000 claims abstract description 17
- 239000000428 dust Substances 0.000 claims abstract description 13
- 238000011084 recovery Methods 0.000 claims abstract description 10
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 230000008676 import Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 21
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The utility model discloses a double-lock-bucket high-capacity energy-saving continuous coal feeding device of a high-pressure pulverized coal gasification furnace, wherein an inlet pipe of a pulverized coal storage tank is connected with a low-pressure nitrogen coal conveying pipe, an outlet pipe of the pulverized coal storage tank is respectively connected with a pulverized coal lock bucket A and a pulverized coal lock bucket B through a pulverized coal lock bucket receiving valve A and a pulverized coal lock bucket receiving valve B, the pulverized coal lock bucket A and the pulverized coal lock bucket B are connected with a high-pressure nitrogen pipe through a lock bucket equalizing valve, the pulverized coal lock bucket A and the pulverized coal lock bucket B are respectively connected with a high-pressure nitrogen pipe through a lock bucket high-pressure nitrogen pressurizing valve A and a lock bucket high-pressure nitrogen pressurizing valve B, the pulverized coal lock bucket A and the pulverized coal lock bucket B are connected with a pulverized coal feeding tank through the pulverized coal lock bucket discharging valve A and the pulverized coal lock bucket discharging valve B, and a lock bucket nitrogen relief valve A and a lock bucket relief valve B of the pulverized coal lock bucket A and the pulverized coal lock bucket B are connected with a pulverized coal recovery bag type dust collector. The setting of two lock buckets has improved fine coal continuous conveying ability, and stability and reliability are high. The setting of the pressure equalizing valve saves a large amount of high-pressure nitrogen and obtains obvious energy-saving benefit.
Description
Technical Field
The utility model relates to the technical field of high-pressure pulverized coal gasification, in particular to a double-lock-bucket high-capacity energy-saving continuous coal feeding device of a high-pressure pulverized coal gasification furnace.
Background
The high-pressure pulverized coal gasification technology is widely popularized and applied in the field of coal chemical industry, particularly the synthetic ammonia industry, and plays a very important role in large-scale device, energy conservation and consumption reduction. The pulverized coal is conveyed to a pulverized coal storage tank by low-pressure nitrogen, then is pressurized by a pulverized coal lock hopper through material receiving and high-pressure nitrogen, so that the pressure of the pulverized coal lock hopper is slightly higher than the pressure in the gasification furnace, a discharge valve of the lock hopper is opened to feed materials to a pulverized coal feeding tank, and the materials are mixed and combusted with oxygen by a burner of the gasification furnace through a coal conveying pipeline of the pulverized coal feeding tank. The lock hopper is decompressed after unloading is finished, the pressure is relieved to 0.02MPa, the pulverized coal in the pulverized coal storage tank is sent into the pulverized coal lock hopper by low-pressure nitrogen pressure, the feeding valve is closed for pressurizing after the material receiving is finished, and the intermittent material receiving, pressurizing, unloading, decompressing and material receiving are carried out in a circulating mode, so that the high-pressure pulverized coal is conveyed to the gasification furnace. Because the single intermittent coal feeding mode, can not guarantee stability and reliability of gasification process completely, the high pressure nitrogen evacuation caused very big waste when the lock fill release simultaneously, power consumption is higher. Therefore, it is necessary to research a high-pressure pulverized coal gasification high-capacity energy-saving continuous coal feeding device.
Disclosure of Invention
The utility model aims to research a double-locking-bucket high-capacity energy-saving continuous coal feeding device of a high-pressure pulverized coal gasifier, which comprises a pulverized coal storage tank, a pulverized coal locking bucket A, a pulverized coal locking bucket B, a pulverized coal feeding tank, a pulverized coal recycling bag type dust collector, a pulverized coal locking bucket receiving valve A, a pulverized coal locking bucket receiving valve B, a locking bucket high-pressure nitrogen charging valve A, a locking bucket high-pressure nitrogen charging valve B, a locking bucket nitrogen pressure relief valve A, a locking bucket nitrogen pressure relief valve B, a pulverized coal locking bucket discharging valve A, a pulverized coal locking bucket discharging valve B and a locking bucket equalizing valve, wherein an inlet pipe of the pulverized coal storage tank is connected with a low-pressure nitrogen (0.45 MPa) coal conveying pipe, an outlet pipe of the pulverized coal storage tank is connected with the pulverized coal locking bucket A and the pulverized coal locking bucket B through the pulverized coal locking bucket receiving valve A and the pulverized coal locking bucket receiving valve B respectively, the pulverized coal locking bucket A and the pulverized coal locking bucket B are connected with the pulverized coal locking bucket A and the pulverized coal locking bucket B through the locking bucket equalizing valve, the pulverized coal locking bucket A and the locking bucket B through the locking bucket equalizing valve respectively, the pulverized coal locking bucket A and the high-pressure nitrogen charging valve B are connected with the high-pressure nitrogen (9.8 MPa) pipe through the locking bucket high-pressure pipe, the pulverized coal lock hopper A and the pulverized coal lock hopper B are connected with a pulverized coal feeding tank through a pulverized coal lock hopper discharge valve A and a pulverized coal lock hopper discharge valve B, a lock hopper nitrogen pressure release valve A and a lock hopper nitrogen pressure release valve B of the pulverized coal lock hopper A and the pulverized coal lock hopper B are connected with a pulverized coal recovery bag type dust collector, and the pulverized coal feeding tank is connected with a gasification furnace burner through a high-pressure coal conveying pipe and continuously sprays coal into the furnace.
Preferably, fine coal lock fill collecting valve A and fine coal lock fill collecting valve B, lock fill high-pressure nitrogen gas pressure charging valve A and lock fill high-pressure nitrogen gas pressure charging valve B, lock fill nitrogen gas relief valve A and lock fill nitrogen gas relief valve B, fine coal lock fill discharge valve A and fine coal lock fill discharge valve B, by the program automatic switching that automatic control system set for according to lock fill pressure variation demand, two fine coal lock fill A and fine coal lock fill B take turns to receive the material, pressurize, unload and the pressure release, realize the continuous stable supply fine coal to the fine coal feed jar.
Preferably, the lock-bucket equalizing valve is operated according to an automatic control system operation program, when the unloading of the pulverized coal lock bucket A is completed, the pulverized coal lock bucket B completes the material receiving process, the lock-bucket equalizing valve is automatically opened, high-pressure nitrogen of the pulverized coal lock bucket A enters the pulverized coal lock bucket B, and after the pressure is balanced, the lock-bucket equalizing valve is automatically closed; a lock bucket nitrogen pressure relief valve A of the pulverized coal lock bucket A automatically opens residual gas to be emptied through a pulverized coal recovery bag type dust collector, and a lock bucket high-pressure nitrogen charging valve B of the pulverized coal lock bucket B automatically opens to supplement a small amount of high-pressure nitrogen to a lock bucket set pressure value.
The utility model has the beneficial effects that:
so as to realize the stable and reliable operation of the large-scale pulverized coal gasification furnace and reduce the kinetic energy consumption at the same time. The technical scheme is as follows: two pulverized coal lock hoppers and corresponding material receiving valves, discharge valves, pressure charging valves and pressure relief valves are arranged and operated by an automatic control system, the automatic control system sets the pressure charging pressure of the lock hoppers according to the pressure of a gasification furnace, automatic switching programs of the valves are programmed, the two lock hoppers alternately receive materials, after the lock hoppers receive the materials (the high limit of a material level meter), the material receiving valves are automatically closed, the pressure charging valves are automatically opened to charge until the pressure of the lock hoppers is higher than the pressure of the gasification furnace by 0.8MPa, the lock hopper discharge valves are automatically opened to discharge the pulverized coal feeding tank, after the discharge is completed (the low limit of the material level meter), the discharge valves and the pressure charging valves are automatically closed, the pressure equalizing valves are automatically opened to equalize with the other lock hoppers, the pressure equalizing valves are closed after the pressure is reduced to 3.4MPa (the two lock hoppers are closed after the pressure is equalized), the pressure relief valves are automatically opened to relieve the pressure, dust-containing nitrogen is discharged to a recovery bag type dust collector, the material is received again after the pressure is relieved to 0.0016MPa, and the two lock hoppers are automatically switched without gaps by the automatic control system, the continuous and stable coal supply to the pulverized coal feeding tank is realized. When one of the two lock hoppers finishes discharging and the other lock hopper finishes receiving materials, the equalizing valve automatically opens the two lock hoppers to start equalizing and equalizing gas, the equalizing valve automatically closes after the pressure of the two lock hoppers is balanced, the pressurizing valve of the boosting lock hopper automatically opens, and a small amount of high-pressure nitrogen is supplemented until the pressure of the lock hoppers is 0.8MPa higher than the pressure of the gasification furnace to achieve the condition of high-pressure coal conveying. The setting of two lock fill has improved fine coal conveying's ability, has realized the continuous feed to fine coal feed tank, has guaranteed the stability and the reliability of fine coal gasifier operation. Due to the arrangement of the pressure equalizing valve, the punching time of the lock hopper is shortened, and meanwhile, a large amount of high-pressure nitrogen is saved to obtain obvious energy-saving benefits.
Drawings
FIG. 1 shows a schematic structural diagram of a high-pressure pulverized coal gasifier double-lock-bucket high-capacity energy-saving continuous coal feeding device.
Description of the reference numerals
1. A pulverized coal storage tank; 2. a pulverized coal locking bucket A; 3. a pulverized coal locking bucket B; 4. a pulverized coal feeding tank; 5. a pulverized coal recovery bag type dust collector; 6. a pulverized coal lock hopper receiving valve A; 7. a pulverized coal lock hopper receiving valve B; 8. a lock bucket high-pressure nitrogen charging valve A; 9. a lock bucket high-pressure nitrogen charging valve B; 10. a lock hopper nitrogen pressure release valve A; 11. a lock hopper nitrogen pressure release valve B; 12. a pulverized coal lock hopper discharge valve A; 13. a pulverized coal lock hopper discharge valve B; 14. lock fill pressure equalizing valve.
The specific implementation mode is as follows:
the utility model is further explained by the double-lock bucket high-capacity energy-saving continuous coal feeding device of the high-pressure pulverized coal gasification furnace with reference to the attached figure 1:
1. to be provided withQ245R material, the design pressure of the pulverized coal storage tank 1 is 0.5MPa, and the volume is 760M3(ii) a The design pressure of the pulverized coal lock hopper A2 and the pulverized coal lock hopper B3 is 8.5MPa, and the volume is 150M3(ii) a The design pressure of the pulverized coal feed tank 4 is 8.5MPa, and the volume is 470M3(ii) a The dust collector 5 of the pulverized coal recovery bag type has the design pressure of 0.045 MPa and the volume of 240m3。
2. Furthermore, an inlet pipe of the pulverized coal storage tank 1 is connected with a low-pressure nitrogen coal conveying pipe, an outlet pipe of the pulverized coal storage tank is respectively connected with a pulverized coal locking hopper receiving valve A2 and a pulverized coal locking hopper B3 through a pulverized coal locking hopper receiving valve A6 and a pulverized coal locking hopper receiving valve B7, the pulverized coal locking hopper A2 and the pulverized coal locking hopper B3 are respectively connected with a high-pressure nitrogen pipe through a locking hopper high-pressure nitrogen pressurizing valve A8 and a locking hopper high-pressure nitrogen pressurizing valve B9, the pulverized coal locking hopper A2 and the pulverized coal locking hopper B3 are respectively connected with a pulverized coal recovery bag-type dust collector 5 through a locking hopper nitrogen pressure relief valve A10 and a locking hopper nitrogen pressure relief valve B11, the pulverized coal locking hopper A2 and the pulverized coal locking hopper B3 are respectively connected with the pulverized coal feeding tank 4 through a pulverized coal locking hopper discharging valve A12 and a pulverized coal locking hopper discharging valve B13, the pulverized coal locking hopper A2 and the pulverized coal locking hopper B3 are connected through a locking hopper pressure equalizing valve 14, the gasification furnace feeding tank 4 is connected with a nozzle through a high-pressure coal conveying pipe, and continuously injecting coal into the furnace.
3. Further, a pulverized coal lock hopper receiving valve A6, a pulverized coal lock hopper receiving valve B7, a lock hopper high-pressure nitrogen charging valve A8, a lock hopper high-pressure nitrogen charging valve B9 and a lock hopper nitrogen pressure relief valve A10; a lock hopper nitrogen pressure release valve B11 and a pulverized coal lock hopper discharge valve A12; the pulverized coal lock hopper discharge valve B13 and the lock hopper pressure equalizing valve 14 are electromagnetic automatic valves and are operated by an automatic control system, the automatic control system sets the pressure conversion sequence of the pulverized coal lock hopper A2 and the pulverized coal lock hopper B3 according to the operating pressure in the gasification furnace and the required flow of pulverized coal, and automatic switching programs of the electromagnetic automatic valves are programmed;
the first step is as follows: when the pulverized coal lock A2 receives the material, the pulverized coal lock B3 starts discharging. A pulverized coal lock hopper receiving valve A6 of a pulverized coal lock hopper A2 is opened, a lock hopper high-pressure nitrogen charging valve A8, a lock hopper nitrogen pressure release valve A10 and a pulverized coal lock hopper discharging valve A12 are all closed; the pulverized coal lock hopper discharge valve B13 of the pulverized coal lock hopper B3 is opened, the pulverized coal lock hopper receiving valve B7 and the lock hopper high-pressure nitrogen pressurizing valve B9 are closed, the lock hopper nitrogen pressure release valve B12 is closed, and the lock hopper pressure equalizing valve 14 is closed.
The second step: when the pulverized coal lock A2 is pressurized, the pulverized coal lock B3 is depressurized. After the pulverized coal lock A2 finishes receiving, the pulverized coal lock receiving valve A6 automatically closes; the pulverized coal lock hopper B3 finishes discharging, and the pulverized coal lock hopper discharge valve B13 is automatically closed; the lock hopper pressure equalizing valve 14 is automatically opened, high-pressure nitrogen in the pulverized coal lock hopper B3 is equalized to the pulverized coal lock hopper A2, after the pressure is equalized, the lock hopper pressure equalizing valve 14 is automatically closed, and residual air in the pulverized coal lock hopper B3 is discharged into the pulverized coal recovery bag-type dust collector 5 through the lock hopper nitrogen pressure relief valve B11 and then is exhausted; the lock hopper high-pressure nitrogen charging valve A8 of the pulverized coal lock hopper A2 is automatically opened immediately, high-pressure nitrogen is supplemented to the pulverized coal lock hopper A2 to a set pressure value, the lock hopper nitrogen pressure relief valve A10 of the pulverized coal lock hopper A2, the pulverized coal lock hopper discharge valve A12, the lock hopper high-pressure nitrogen charging valve B9 and the pulverized coal lock hopper receiving valve B7 are all in a closed state.
The third step: the pulverized coal locking bucket A2 unloads, and the pulverized coal locking bucket B3 receives materials. When the pressure of the pulverized coal lock hopper A2 reaches a set pressure value, a pulverized coal lock hopper discharge valve A12 is opened, pulverized coal enters a gasification furnace nozzle through a pulverized coal feeding tank, meanwhile, a lock hopper high-pressure nitrogen charging valve A8 is closed, and a pulverized coal lock hopper receiving valve A6 and a lock hopper nitrogen pressure release valve A10 are in a closed state; meanwhile, a pulverized coal lock hopper receiving valve B7 of the pulverized coal lock hopper B3 is opened, a pulverized coal lock hopper discharging valve B13 is closed, and the pulverized coal lock hopper discharging valve B13 and a lock hopper high-pressure nitrogen charging valve B9 are in a closed state. After the discharging pulverized coal lock A2 finishes discharging, the pulverized coal lock A12 of the pulverized coal lock A2 is automatically closed; the discharged pulverized coal lock hopper B3 finishes receiving materials, the pulverized coal lock hopper receiving valve B7 is automatically closed, the lock hopper pressure equalizing valve 14 is automatically opened, high-pressure nitrogen in the pulverized coal lock hopper A2 is discharged into the pulverized coal lock hopper B3, after the pressure is balanced, the lock hopper pressure equalizing valve 14 is automatically closed, the lock hopper nitrogen pressure relief valve A10 of the pulverized coal lock hopper A2 is automatically opened, residual gas in the pulverized coal lock hopper A2 is discharged into the pulverized coal recovery bag type dust collector 5 and then is emptied, and the filtered pulverized coal falls into the pulverized coal filter tank 1; meanwhile, a lock hopper high-pressure nitrogen charging valve B9 of the pulverized coal lock hopper B3 is automatically opened, and high-pressure nitrogen is supplemented into the pulverized coal lock hopper B3 until the pressure in the pulverized coal lock hopper B3 reaches a set pressure value.
As above, four steps and one circulation are adopted, the pulverized coal locking bucket A2 and the pulverized coal locking bucket B3 are alternately receivedPressure charging, discharging, pressure releasing, material receiving and gapless automatic switching to realize continuous and stable coal conveying of the gasification furnace, and nitrogen excess pressures in the two lock hoppers are mutually supplemented by using a lock hopper pressure equalizing valve 14 between a pulverized coal lock hopper A2 and a pulverized coal lock hopper B3, so that 9.8MPa of nitrogen can be saved by one ton of ammonia and 2.5M of nitrogen can be saved by 2.5M of the nitrogen3And the power consumption can be reduced by about 16 MJ.
Claims (2)
1. The utility model provides an energy-conserving continuous coal feeding device of two lock fill high capacity of high pressure fine coal gasifier, including fine coal storage tank (1), fine coal lock fill A (2) and fine coal lock fill B (3), fine coal feed jar (4), fine coal retrieves pocket type dust remover (5), fine coal lock fill receiving valve A (6) and fine coal lock fill receiving valve B (7), lock fill high-pressure nitrogen gas pressure charging valve A (8) and lock fill high-pressure nitrogen gas pressure charging valve B (9), lock fill nitrogen gas relief valve A (10) and lock fill nitrogen gas relief valve B (11), fine coal lock fill discharge valve A (12) and fine coal lock fill discharge valve B (13), lock fill equalizing valve (14) are constituteed, characterized by: pulverized coal storage tank (1) import pipe and low pressure nitrogen gas coal conveying union coupling, its outlet pipe passes through pulverized coal lock fill collecting valve A (6) with pulverized coal lock fill collecting valve B (7), respectively with pulverized coal lock fill A (2) with pulverized coal lock fill B (3) are connected, pulverized coal lock fill A (2) with pass through between pulverized coal lock fill B (3) lock fill equalizing valve (14) are connected, pulverized coal lock fill A (2) with pulverized coal lock fill B (3) pass through respectively lock fill high pressure nitrogen gas pressure charging valve A (8) with lock fill high pressure nitrogen gas pressure charging valve B (9) and high pressure nitrogen gas union coupling, pulverized coal lock fill A (2) with pulverized coal lock fill B (3) pass through relief valve lock fill discharge valve A (12) with pulverized coal lock fill discharge valve B (13) with feeding tank (4) are connected, lock fill A (2) with pulverized coal lock fill B (3) lock fill discharge valve A (10) with pulverized coal lock fill B (3) lock fill discharge valve A (13) with feeding tank (4) are connected, lock fill A (2) and pulverized coal lock fill B (3) are connected The lock hopper nitrogen pressure release valve B (11) is connected with the pulverized coal recovery bag type dust collector (5), and the pulverized coal feeding tank (4) is connected with a gasification furnace burner through a high-pressure coal conveying pipe and continuously sprays coal into the furnace.
2. The double-lock-bucket high-capacity energy-saving continuous coal feeding device of the high-pressure pulverized coal gasifier according to claim 1, wherein the pulverized coal lock-bucket receiving valve A (6) and the pulverized coal lock-bucket receiving valve B (7), the lock-bucket high-pressure nitrogen charging valve A (8) and the lock-bucket high-pressure nitrogen charging valve B (9), the lock-bucket nitrogen pressure release valve A (10) and the lock-bucket nitrogen pressure release valve B (11), the pulverized coal lock-bucket discharging valve A (12) and the pulverized coal lock-bucket discharging valve B (13) are automatically switched by an automatic control system according to a program set by a lock-bucket pressure change demand, and the pulverized coal lock-bucket A (2) and the pulverized coal lock-bucket receiving valve B (3) alternately charge, discharge and discharge pulverized coal, so that the pulverized coal is continuously and stably supplied to the pressure release feeding tank (4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220018869.9U CN216662977U (en) | 2022-01-06 | 2022-01-06 | Double-lock-bucket high-capacity energy-saving continuous coal feeding device of high-pressure pulverized coal gasification furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220018869.9U CN216662977U (en) | 2022-01-06 | 2022-01-06 | Double-lock-bucket high-capacity energy-saving continuous coal feeding device of high-pressure pulverized coal gasification furnace |
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| CN216662977U true CN216662977U (en) | 2022-06-03 |
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| CN202220018869.9U Active CN216662977U (en) | 2022-01-06 | 2022-01-06 | Double-lock-bucket high-capacity energy-saving continuous coal feeding device of high-pressure pulverized coal gasification furnace |
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