CN220466839U - Dense phase conveying system for fine particles - Google Patents
Dense phase conveying system for fine particles Download PDFInfo
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- CN220466839U CN220466839U CN202321746386.1U CN202321746386U CN220466839U CN 220466839 U CN220466839 U CN 220466839U CN 202321746386 U CN202321746386 U CN 202321746386U CN 220466839 U CN220466839 U CN 220466839U
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- negative pressure
- valve
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- pumping device
- pipe
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- 239000010419 fine particle Substances 0.000 title claims abstract description 12
- 238000005086 pumping Methods 0.000 claims abstract description 62
- 239000000843 powder Substances 0.000 claims abstract description 25
- 238000010926 purge Methods 0.000 claims abstract description 24
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000005192 partition Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000010881 fly ash Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 239000002956 ash Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000007664 blowing Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Air Transport Of Granular Materials (AREA)
Abstract
The utility model discloses a dense-phase conveying system for fine particles, which comprises a sending tank, a negative pressure pumping device and an air source; the outlet of the air source is communicated with an injection pipe of the negative pressure pumping device, and the injection pipe is provided with a conveying air flowmeter and a first cut-off valve; the feed inlet of the negative pressure pumping device is connected with an outlet pipeline of the sending tank through a second cut-off valve; the first outlet of the negative pressure pumping device is communicated with the powder return pipeline through a third cut-off valve; the second outlet of the negative pressure pumping device is connected with a blind cover through a pipeline, the blind cover and a feeding hole of the negative pressure pumping device are arranged up and down oppositely, a purging pipe is arranged on the pipeline between the second outlet of the negative pressure pumping device and the blind cover, the other end of the purging pipe is communicated with the pipeline between the air source and the conveying air flow meter, and a purging flowmeter and a fourth cut-off valve are sequentially arranged on the purging pipe along the flowing direction of the air; the powder return pipeline is sequentially provided with a pressure gauge, a temperature sensor and a powder return flowmeter along the flow direction of the materials.
Description
Technical field:
the utility model relates to the technical field of conveying, in particular to a dense phase conveying system for fine particles.
The background technology is as follows:
the dense-phase conveying system in the coal chemical industry is the most commonly used system, when the raw gas is purified, ash in the raw gas is required to be intercepted by dust removing equipment, the intercepted fly ash is conveyed to a sending tank, the fly ash is conveyed to a gasification furnace for recycling under the action of the dense-phase conveying system, the gasification efficiency is improved, and the purified raw gas is conveyed to a subsequent treatment system.
The existing dense-phase conveying system mainly comprises a conveying pipeline, conveying equipment, a control system and the like, and the whole dense-phase conveying system comprises the following processes: firstly, materials enter a powder return pipeline through a sending tank, and then the materials are boosted by conveying equipment to be quickly conveyed along the powder return pipeline, wherein the conveying equipment is a feeder.
The technical problems are that: the filter is inside the filter core and is easy to break, a series of problems such as internals drop, and the internals that produce drop into the batcher through sending jar in, cause to carry to stop up, need keep apart the pressure release with the batcher together with sending jar and just can be for online maintenance, can force the system to stop when serious, also can contain a large amount of ash content in the in-process exhaust gas of pressure release, caused the waste of flying dust, the internals that drop get into the batcher simultaneously, because there is a large amount of flying dust in the batcher memory, lead to internals and other foreign matters unable quick take out, need dismantle the batcher, delay production.
The utility model comprises the following steps:
the utility model aims to provide a dense phase conveying system for fine particles.
The utility model is implemented by the following technical scheme: the dense phase conveying system for fine particles comprises a sending tank, a negative pressure pumping device and an air source;
the outlet of the air source is communicated with an injection pipe of the negative pressure pumping device, and the injection pipe is provided with a conveying air flowmeter and a first cut-off valve;
the feed inlet of the negative pressure pumping device is connected with the outlet pipeline of the sending tank through a second cut-off valve;
the first outlet of the negative pressure pumping device is communicated with the powder return pipeline through a third cut-off valve;
the second outlet of the negative pressure pumping device is connected with a blind cover through a pipeline, the blind cover and a feeding hole of the negative pressure pumping device are arranged up and down oppositely, a purging pipe is arranged on the pipeline between the second outlet of the negative pressure pumping device and the blind cover, the other end of the purging pipe is communicated with the pipeline between the air source and the conveying air flow meter, and a purging flowmeter and a fourth cut-off valve are sequentially arranged on the purging pipe along the flowing direction of the air;
and the powder return pipeline is sequentially provided with a pressure gauge, a temperature sensor and a powder return flowmeter along the flow direction of the materials.
Further, the device also comprises a controller, wherein the input end of the controller is connected with the conveying air flow meter, the purging flowmeter and the pressure meter, and the output end of the controller is connected with the first cut-off valve and the fourth cut-off valve.
Further, a partition plate is arranged in the storage bin of the sending tank, and the partition plate is fixedly connected with the middle part of the storage bin.
Further, negative pressure suction device is including suction tube, injection pipe, the one end of suction tube is the blind end, the other end of suction tube is equipped with first export, the suction tube is kept away from the feed inlet has been seted up on one side top of first export, the suction tube is kept away from the second export has been seted up to one side bottom of first export, the inside of suction tube is fixed with the orifice plate, the orifice plate perpendicular to the axis direction setting of suction tube, the middle part of orifice plate is fixed with the suction tube, the suction tube runs through the blind end of suction tube extends to the outside.
Further, the suction pipe is provided with a blow-down pipe, and the blow-down pipe is provided with a blow-down valve.
The utility model has the advantages that: when the negative pressure pumping device is blocked by a large piece of foreign matters, the fly ash in the negative pressure pumping device is purged to a powder return pipeline by nitrogen, after the fly ash in the negative pressure pumping device is replaced, a third cut-off valve is closed, the inside of the negative pressure pumping device can be decompressed through a blow-down pipe, a blind cover is opened after decompression is finished, the foreign matters are taken out, and the problems of safe online overhaul and fly ash treatment in the process of isolating and decompressing in the prior art are solved under the cooperation of the blow-down pipe;
meanwhile, compared with an original feeder, the small negative pressure pumping device is convenient to install the sealed second cut-off valve and the sealed third cut-off valve, isolation of the sending tank and the powder return pipeline is achieved, small-range isolation replacement and online disassembly and inspection are achieved, meanwhile, cleaning of internal parts in the negative pressure pumping device is facilitated under the effect of the blind cover, and the technical problem of difficult cleaning in the prior art is solved.
Description of the drawings:
in order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a system connection of the present utility model;
in the figure: the device comprises a sending tank 1, a negative pressure pumping device 2, an injection pipe 21, a conveying air flow meter 22, a first cut-off valve 23, a blow-down pipe 24, a blow-down valve 25, an orifice plate 26, a pumping pipe 27, a second cut-off valve 3, a third cut-off valve 4, a powder return pipeline 5, a blind cover 6, a purging pipe 7, a purging flowmeter 8, a fourth cut-off valve 9, a pressure gauge 10, a temperature sensor 11, a powder return flowmeter 12, a controller 13, a partition 14, a bin 15 and an air source 16.
The specific embodiment is as follows:
the following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, the dense phase conveying system of fine particles comprises a sending tank 1, a negative pressure pumping device 2 and an air source 16;
the outlet of the air source 16 is communicated with an injection pipe 21 of the negative pressure pumping device 2, a conveying air flowmeter 22 and a first cut-off valve 23 are arranged on the injection pipe 21, the air source 16 comprises a carbon dioxide air source 16 and a nitrogen air source 16, the carbon dioxide air source 16 is used during normal conveying, and the nitrogen air source 16 is used during maintenance and replacement.
The feed inlet of the negative pressure pumping device 2 is connected with the outlet pipeline of the sending tank 1 through a second cut-off valve 3;
the first outlet of the negative pressure pumping device 2 is communicated with a powder return pipeline 5 through a third cut-off valve 4;
the second outlet of the negative pressure pumping device 2 is connected with a blind cover 6 through a pipeline, the blind cover 6 and a feed inlet of the negative pressure pumping device 2 are arranged up and down oppositely, a purging pipe 7 is arranged on the pipeline between the second outlet of the negative pressure pumping device 2 and the blind cover 6, the other end of the purging pipe 7 is communicated with the pipeline between an air source 16 and a conveying air flow meter 22, a purging flowmeter 8 and a fourth cut-off valve 9 are sequentially arranged on the purging pipe 7 along the flowing direction of air, and the purging pipe 7 has the functions that 1, when ash conveying is not smooth, bridging phenomenon inside the sending tank 1 is purged through the purging pipe 7, so that normal blanking is ensured; 2. when the negative pressure pumping device 2 is blocked due to large foreign matters, the fly ash in the negative pressure pumping device 2 is purged to the powder return pipeline 5 by nitrogen, after the fly ash in the negative pressure pumping device 2 is replaced, the third cut-off valve 4 is closed, the inside of the negative pressure pumping device 2 can be decompressed through the blow-down pipe 24, the blind cover 6 is opened after decompression is finished, the foreign matters are taken out, the problem of fly ash waste generated in the process of isolating and decompressing in the prior art is solved under the cooperation of the blow-down pipe 24, meanwhile, compared with the original feeder, the small negative pressure pumping device 2 is convenient to install the sealed second cut-off valve 3 and the third cut-off valve 4, the isolation of the sending tank 1 and the powder return pipeline 5 is realized, the isolation replacement and the online disassembly in a small range are realized, and meanwhile, the internal parts in the negative pressure pumping device 2 are convenient to clean under the action of the blind cover 6, and the technical problem of difficult cleaning in the prior art is solved; 3. along with the extension of production time, when the sending tank 1 needs to be pressurized, the second cut-off valve 3 is opened, the first cut-off valve 23 and the third cut-off valve 4 are closed, high-pressure gas is pumped into the sending tank 1 through the purging pipe 7, the pressurizing effect on the sending tank 1 is realized, and the pressure requirement required by a system is ensured.
The powder return pipeline 5 is sequentially provided with a pressure gauge 10, a temperature sensor 11 and a powder return flowmeter 12 along the flow direction of materials, and further comprises a controller 13, wherein the input end of the controller 13 is connected with a conveying airflow meter 22, a purging flowmeter 8 and the pressure gauge 10, the output end of the controller 13 is connected with a first cut-off valve 23 and a fourth cut-off valve 9, and the pressure and the flow of gas in the injection pipe 21 are controlled by the pressure gauge 10 on the powder return pipeline 5 and the conveying airflow meter 22 on the injection pipe 21 so as to achieve a stable conveying state.
The feed bin 15 of the sending tank 1 is provided with a baffle plate 14, the baffle plate 14 is fixedly connected with the middle part of the feed bin 15, and the baffle plate 14 has the function of ensuring the flowing state of materials in the sending tank 1.
The negative pressure suction device 2 comprises a suction tube 27 and a suction tube 21, one end of the suction tube 27 is a closed end, a first outlet is formed in the other end of the suction tube 27, a feed inlet is formed in the top end of one side, far away from the first outlet, of the suction tube 27, a second outlet is formed in the bottom end of one side, far away from the first outlet, of the suction tube 27, a pore plate 26 is fixed in the suction tube 27, the pore plate 26 is perpendicular to the axis direction of the suction tube 27, the suction tube 21 is fixed in the middle of the pore plate 26, the suction tube 21 penetrates through the closed end of the suction tube 27 to extend to the outer side, the pore plate 26 is perpendicular to the axis direction of the suction tube 27, the pore plate 26 is used for accelerating the flowing state of materials, meanwhile, the function of intercepting foreign matters such as internal matters is achieved, and the foreign matters such as internal matters are intercepted above the third outlet of the negative pressure suction device 2, and the foreign matters are conveniently taken out through a blind plate.
The evacuation pipe 27 is provided with the evacuation pipe 24, the evacuation pipe 24 is provided with the evacuation valve 25, when the downstream of the dense-phase conveying pipeline is high-pressure equipment, the evacuation valve 25 of the evacuation pipe 24 is opened, the gas in the negative pressure pumping device 2 is evacuated, and after pressure relief, the blind cover 6 at the second outlet of the negative pressure pumping device 2 can be opened for cleaning and recovering, so that quick online maintenance is realized.
The specific operation process of the embodiment is as follows:
1. when ash is required to be conveyed, the third cut-off valve 4 and the first cut-off valve 23 are firstly opened, the suction pipe 27 and the powder return pipeline 5 of the negative pressure suction device 2 are purged, after the smooth of the pipeline is confirmed, the second cut-off valve 3 is opened, and the pressure gauge 10 on the powder return pipeline 5 and the conveying gas flow meter 22 on the suction pipe 21 are used for controlling the pressure and the flow of the gas in the suction pipe 21 so as to enable the gas to reach a stable conveying state;
2. when the ash conveying is not smooth, the third cut-off valve 4 can be temporarily closed, the fourth cut-off valve 9 is opened, and the reverse blowing loosening blocking part is carried out on the sending tank 1 or the negative pressure pumping device 2, so that the conveying function is recovered;
3. the ejector tube 21 of the negative pressure pumping device 2 is matched with the pore plate 26, so that an environment lower than the system pressure can be formed in the sending cavity of the negative pressure pumping device 2, the materials in the sending tank 1 smoothly flow into the sending cavity, and the conveying pressure on the powder return pipeline 5 is determined by the pressure of the air source 16 of the ejector tube 21;
4. when larger foreign matters enter and affect ash conveying, the second cut-off valve 3 is closed, the nitrogen is utilized to blow the internal boosted material clean and discharge the powder return pipeline 5, then the third cut-off valve 4 is closed, when the downstream of the dense-phase conveying pipeline is high-pressure equipment, the blow-down valve 25 of the blow-down pipe 24 is opened, the gas in the negative pressure pumping device 2 is blown down, after pressure relief, the blind cover 6 at the second outlet of the negative pressure pumping device 2 can be opened for cleaning and recovering, and quick online maintenance is realized;
5. setting the process specification of injection negative gas pumping according to the process condition of downstream fly ash receiving equipment;
6. for the equipment with lower pressure in the downstream conveying process, the sending tank 1 does not need supplementary gas to enter the sending tank 1 in the conveying process, the pressure of the equipment naturally reduces the pressure along with the progress of the conveying process, when the material level of the sending tank 1 is lower, the third cut-off valve 4 is closed, the fourth cut-off valve 9 is opened, and the blowing and blocking gas is loosened by the blowing pipe 7 to boost the sending tank 1 and then the material is received.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (5)
1. The dense-phase conveying system for the fine particles is characterized by comprising a sending tank, a negative pressure pumping device and an air source;
the outlet of the air source is communicated with an injection pipe of the negative pressure pumping device, and the injection pipe is provided with a conveying air flowmeter and a first cut-off valve;
the feed inlet of the negative pressure pumping device is connected with the outlet pipeline of the sending tank through a second cut-off valve;
the first outlet of the negative pressure pumping device is communicated with the powder return pipeline through a third cut-off valve;
the second outlet of the negative pressure pumping device is connected with a blind cover through a pipeline, the blind cover and a feeding hole of the negative pressure pumping device are arranged up and down oppositely, a purging pipe is arranged on the pipeline between the second outlet of the negative pressure pumping device and the blind cover, the other end of the purging pipe is communicated with the pipeline between the air source and the conveying air flow meter, and a purging flowmeter and a fourth cut-off valve are sequentially arranged on the purging pipe along the flowing direction of the air;
and the powder return pipeline is sequentially provided with a pressure gauge, a temperature sensor and a powder return flowmeter along the flow direction of the materials.
2. The fine particle dense phase conveying system of claim 1 further comprising a controller, an input of the controller being in communication with the conveying gas flow meter, the purge flow meter, the pressure gauge, an output of the controller being in communication with the first shut-off valve, the fourth shut-off valve.
3. The dense phase conveying system of fine particles according to claim 2, wherein the bin of the delivery tank is provided with a partition plate fixedly connected with the middle part of the bin.
4. The fine particle dense-phase conveying system according to claim 3, wherein the negative pressure pumping device comprises a pumping pipe and a pumping pipe, one end of the pumping pipe is a closed end, a first outlet is formed in the other end of the pumping pipe, a feeding hole is formed in the top end of one side, far away from the first outlet, of the pumping pipe, a second outlet is formed in the bottom end of one side, far away from the first outlet, of the pumping pipe, an orifice plate is fixed in the pumping pipe and perpendicular to the axis direction of the pumping pipe, the middle of the orifice plate is fixed with the pumping pipe, and the pumping pipe penetrates through the closed end of the pumping pipe and extends to the outer side.
5. The dense phase conveying system of fine particles of claim 4 wherein the suction tube is provided with a blow-down tube and the blow-down tube is provided with a blow-down valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321746386.1U CN220466839U (en) | 2023-07-05 | 2023-07-05 | Dense phase conveying system for fine particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321746386.1U CN220466839U (en) | 2023-07-05 | 2023-07-05 | Dense phase conveying system for fine particles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220466839U true CN220466839U (en) | 2024-02-09 |
Family
ID=89797560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321746386.1U Active CN220466839U (en) | 2023-07-05 | 2023-07-05 | Dense phase conveying system for fine particles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220466839U (en) |
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2023
- 2023-07-05 CN CN202321746386.1U patent/CN220466839U/en active Active
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