CN215625325U - Continuous decompression conveyor of high pressure powder material - Google Patents
Continuous decompression conveyor of high pressure powder material Download PDFInfo
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- CN215625325U CN215625325U CN202122052496.5U CN202122052496U CN215625325U CN 215625325 U CN215625325 U CN 215625325U CN 202122052496 U CN202122052496 U CN 202122052496U CN 215625325 U CN215625325 U CN 215625325U
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Abstract
The utility model provides a high-pressure powder material continuous decompression conveying device, which comprises a continuous decompression device and a powder material conveying device; the continuous pressure reducing device comprises a pressure reducing pipe and a pressure control valve, wherein the pressure reducing pipe comprises a pipe body and a tubular filter element coaxially arranged in the pipe body; the material inlet of the pressure reducing pipe is used for receiving high-pressure powder materials, and the received high-pressure powder materials can enter the tubular filter element; the pipe body is provided with a gas outlet, and the gas outlet of the pipe body is connected with the pressure control valve; the powder material conveying device is used for conveying powder materials discharged from a material outlet of the pressure reducing pipe by adopting conveying gas. The problems of incapability of continuous conveying, low conveying efficiency, complex operation process and the like in the traditional alternating pressure intermittent feeding process are solved.
Description
Technical Field
The utility model relates to the field of powder material conveying in the field of coal chemical industry, in particular to a high-pressure powder material continuous pressure reduction conveying device.
Background
The ash utilized by the pneumatic ash conveying system refers to dry ash, not ash in the hydraulic ash removing system. In some cases, ash and water binding can be accompanied by chemical changes, such as digestion of calcium oxide or hydrolysis of silicates, which can affect the likelihood of ash utilization. The liquid slag discharge has large water consumption, the produced sewage contains a large amount of harmful substances and solid suspended matters, and can be recycled after a complex sewage treatment process, thereby causing a series of problems of environment damage, water resource waste and the like. Therefore, the conveying mode of conveying ash by air becomes a necessary way for utilizing the ash.
At present, the high-pressure powder material conveying generally adopts an alternating pressure tank intermittent conveying technology at home and abroad, powder is converted from high pressure to low pressure through the alternating pressure tank, and then the powder conveying is completed through pneumatic conveying.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a high-pressure powder material continuous pressure reduction conveying device, which solves the problems of incapability of continuous conveying, low conveying efficiency, complex operation process and the like in the traditional alternating pressure intermittent feeding process.
The utility model is realized by the following technical scheme:
a high-pressure powder material continuous decompression conveying device comprises a continuous decompression device and a powder material conveying device;
the continuous pressure reducing device comprises a pressure reducing pipe and a pressure control valve, wherein the pressure reducing pipe comprises a pipe body and a tubular filter element coaxially arranged in the pipe body; the material inlet of the pressure reducing pipe is used for receiving high-pressure powder materials, and the received high-pressure powder materials can enter the tubular filter element; the pipe body is provided with a gas outlet, and the gas outlet of the pipe body is connected with the pressure control valve;
the powder material conveying device is used for conveying powder materials discharged from a material outlet of the pressure reducing pipe by adopting conveying gas.
Preferably, the powder material conveying device comprises a first conveying gas stop valve, a powder collector, a powder material stop valve and a powder material regulating valve;
the inlet of the first conveying gas cut-off valve is connected with a conveying gas source, the outlet of the first conveying gas cut-off valve is connected with the material inlet of the powder collector, and the material outlet of the powder collector is sequentially connected with the powder material cut-off valve and the powder material regulating valve; the material inlet of the powder collector is also connected with the material outlet of the pressure reducing pipe.
Further, powder material conveyor still include the second and carry the gas trip valve, the entry and the transport air supply of second transport gas trip valve are connected, the export of second transport gas trip valve is connected to the outlet pipeline of powder material governing valve.
Furthermore, the powder material conveying device also comprises a fluidization gas cut-off valve; one end of the fluidization gas cut-off valve is connected with the bottom of the powder collector, and the other end of the fluidization gas cut-off valve is connected to an inlet pipeline of the second conveying gas cut-off valve.
Furthermore, a fluidization air pipeline is connected between the top and the bottom of the powder collector, and a valve is arranged on the fluidization air pipeline.
Furthermore, a discharge pipeline is arranged at the bottom of the powder collector, and a discharge valve of the powder collector is arranged on the discharge pipeline.
Furthermore, a pressure gauge is arranged on an outlet pipeline of the powder material regulating valve.
Preferably, the pipe that reduces pressure is including being a plurality of pipe that reduces pressure that the series connection set up, and the pressure control valve includes and presses the valve with a plurality of controls that the pipe one-to-one that reduces pressure set up.
Preferably, the continuous pressure reducing device further comprises a relief cut-off valve, and an outlet of the pressure control valve is connected with the relief cut-off valve.
Preferably, the device also comprises a back-blowing cut-off valve, the inlet of which is connected with a back-blowing air source; the outlet pipeline of the back flushing cut-off valve is vertically connected with the pipe-in-pipe body of the pressure reducing pipe.
Compared with the prior art, the utility model has the following beneficial technical effects:
in the conveying device, the tubular filter element is arranged in the pressure reducing pipe, when the conveying device works, high-pressure powder materials enter the tubular filter element, the powder materials are conveyed in the filter element in a flowing mode, high-pressure gas carried by the powder materials passes through the filter element, enters an annular gap between the pipe body and the filter element, and is discharged through the pressure control valve, so that the high-pressure gas carried by the powder materials is separated and discharged through the pressure reducing pipe, and the online pressure reducing effect of the high-pressure powder materials is realized. The pressure reducing pipe can continuously convey high-pressure powder materials and simultaneously realize pressure reduction, so that continuous pressure reduction conveying can be realized, and the conveying efficiency is improved.
Furthermore, the powder collector is arranged to stabilize the powder material after pressure reduction, meanwhile, the pressure of the pressure control valve is used for roughly adjusting the powder conveying speed, and the opening size of the powder material regulating valve is used for accurately controlling the powder material conveying flow, so that the powder material conveying flow can be regulated.
Furthermore, the arrangement of the second conveying gas stop valve can ensure that the powder materials in the conveying device are smoothly conveyed, and the problem of blockage in a rear-end conveying pipeline is avoided.
Furthermore, the fluidized gas cut-off valve is arranged to play a role in quickly opening and closing the two paths of fluidized gases of the powder collector, so that the powder material can be quickly suspended.
Furthermore, the arrangement of the top and bottom fluidized air pipelines enables the materials in the powder collector to be in a suspended state, thereby being beneficial to the stable conveying of the powder materials.
Furthermore, a discharge valve of the powder collector is arranged, so that when large particles are deposited in the powder collector, the deposits can be removed in time.
Furthermore, a plurality of pressure reducing pipes are arranged, so that pressure grading control is realized. The pressure in different pressure reducing pipes can be controlled in a targeted manner through the pressure control valve, and the pressure can be correspondingly adjusted according to the pressure of the powder source. When the initial pressure is larger, the pressure can be stably reduced step by step through the graded pressure reduction, and the pressure instability caused by one-step pressure reduction can be avoided.
Furthermore, online back flushing is arranged, so that powder blockage is avoided. And the pressure reducing pipe is regularly blown and swept by the back blowing device, so that the blockage of the filter element is avoided, and the stability of the process operation is improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. a continuous pressure reduction device; 2. a back flushing device; 3. a powder material conveying device; 4. a primary pressure reducing tube; 5. a secondary pressure reducing tube; 6. a first-stage pressure control valve; 7. a secondary pressure control valve; 8. a bleed shutoff valve; 9. a first-stage blowback cut-off valve; 10. a second-stage back-blowing cut-off valve; 11. a powder collector; 12. a discharge valve of the powder collector; 13. a first delivery gas shut-off valve; 14. a fluidization gas shutoff valve; 15. a second delivery gas shut-off valve; 16. a flow meter; 17. a powder material cut-off valve; 18. a powder material regulating valve; 19. and a pressure gauge.
Detailed Description
The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.
Referring to fig. 1, the present invention includes a continuous pressure reducing device 1, a blowback device 2, and a powder material conveying device 3.
The back-blowing device 2 comprises a back-blowing cut-off valve with an inlet connected with a back-blowing air source. In this embodiment, the blowback cut-off valve includes a first-stage blowback cut-off valve 9 and a second-stage blowback cut-off valve 10 connected in parallel.
The continuous pressure reducing device 1 comprises a pressure reducing pipe, and the pressure reducing pipe comprises a pipe body and a filter element coaxially arranged inside the pipe body. In this embodiment, the pressure reducing pipe comprises a first-stage pressure reducing pipe 4 and a second-stage pressure reducing pipe 5 which are connected in series, three purging pipelines are led out from an outlet of a first-stage reverse blowing cut-off valve 9 and are respectively and vertically connected with two ends and three middle ends of the first-stage pressure reducing pipe 4, three purging pipelines are led out from an outlet of a second-stage reverse blowing cut-off valve 10 and are respectively and vertically connected with two ends and three middle ends of the second-stage pressure reducing pipe 5, a material outlet of the first-stage pressure reducing pipe 4 is connected with a material inlet of the second-stage pressure reducing pipe 5, gas outlets of the first-stage pressure reducing pipe 4 and the second-stage pressure reducing pipe 5 are respectively connected with a first-stage pressure control valve 6 and a second-stage pressure control valve 7, and outlets of the first-stage pressure control valve 6 and the second-stage pressure control valve 7 are connected with a gas release cut-off valve 8; a metal sintering filter element is arranged in the first-stage pressure reducing pipe and the second-stage pressure reducing pipe, the powder material passes through the metal sintering filter element from top to bottom, and high-pressure gas carried in the powder material can enter an annular gap between the pressure reducing pipe and the filter element through the filter element; then discharged through the pressure control valve and the relief gas cut-off valve 8. The pressure reducing pipe is preferably arranged vertically.
The powder material conveying device 3 comprises a flow meter 16 connected with a conveying air source, a conveying air stop valve, a powder collector 11, a powder material stop valve 17, a powder material regulating valve 18, a pressure gauge 19 and a collecting bin. In the embodiment, the conveying gas cut-off valve comprises a first conveying gas cut-off valve 13 and a second conveying gas cut-off valve 15, the inlet of the first conveying gas cut-off valve (13) is connected with a flowmeter 16, the outlet of the first conveying gas cut-off valve (13) is communicated with the collection bin through a powder collector 11, a powder material cut-off valve 17, a powder material regulating valve 18 and a pressure gauge 19 in sequence, and the material outlet of the pressure reducing pipe is communicated with a pipeline between the first conveying gas cut-off valve 13 and the powder collector 11; the inlet of the second conveying gas cut-off valve 15 is connected with the flowmeter 16, and the outlet of the second conveying gas cut-off valve 15 is connected to the outlet pipeline of the powder material regulating valve 18. In this embodiment, the powder material conveying device 3 further includes a fluidizing gas cut-off valve 14, one end of the fluidizing gas cut-off valve 14 is connected to the discharge end of the bottom of the powder collector 11, and the other end of the fluidizing gas cut-off valve 14 is connected to a pipeline between the second conveying gas cut-off valve 15 and the flow meter 16. The medium adopted by the conveying gas source is nitrogen or carbon dioxide, and the pressure is higher than the pressure of the material in the pressure reducing pipe. A discharge pipeline is arranged at the bottom of the powder collector 11, a discharge valve 12 of the powder collector is arranged on the discharge pipeline, and one end of a fluidizing gas cut-off valve 14 is connected to the discharge pipeline between the powder collector 11 and the discharge valve 12 of the powder collector. A fluidizing gas circulation pipeline is connected between the top and the bottom of the powder collector 11, and a valve is arranged on the fluidizing gas pipeline.
The utility model provides a conveying method for a high-pressure powder material continuous reduced-pressure conveying device, taking conveying of bottom ash of a reaction furnace as an example, the particle size of the coarse ash is 30-180 mu m, the pressure is 2.3MPa, and the method comprises the following specific operation steps:
1) when the continuous decompression device 1 and the powder material conveying device 3 are filled with coarse ash, a first-stage back-blowing cut-off valve 9 and a second-stage back-blowing cut-off valve 10 of the back-blowing device are opened, a relief gas cut-off valve 8 is opened simultaneously, the opening degree of a first-stage pressure control valve 6 is adjusted to be about 60%, the pressure of a first-stage decompression pipe 4 is controlled to be about 1.6MPa, when the pressure of the first-stage decompression pipe 4 reaches a target value, the opening degree of a second-stage pressure control valve 7 is adjusted to be about 70%, and the pressure of the coarse ash in the second-stage decompression pipe 5 is controlled to be 0.4-0.7 MPa.
2) The gas flow rates in the pipelines of the conveying gas cut-off valve 13, the fluidizing gas cut-off valve 14 and the conveying gas cut-off valve 15 are respectively calibrated to be 25Nm through a flowmeter 163/h、75Nm3/h、150Nm3/h。
3) The powder material regulating valve 18 is opened to a preset opening degree of 30%, the conveying gas cut-off valve 15 is opened, the conveying pipeline is purged, and then the powder material cut-off valve 17, the fluidizing gas cut-off valve 14 and the conveying gas cut-off valve 13 are sequentially opened.
4) When the pressure gauge 19 displays that the pressure is 100-150kPa, the conveying gas stop valve 13 is closed, and the conveying speed of the powder material is controlled by adjusting the opening degree of the powder material adjusting valve 18 to be 30-80 percent.
5) When the powder material is conveyed, the powder material cut-off valve 17 and the fluidizing gas cut-off valve 14 are closed in sequence, the conveying gas cut-off valve 15 is kept closed for one to two minutes, and then the powder material regulating valve 18 is closed.
Claims (10)
1. A high-pressure powder material continuous decompression conveying device is characterized by comprising a continuous decompression device (1) and a powder material conveying device (3);
the continuous pressure reducing device (1) comprises a pressure reducing pipe and a pressure control valve, wherein the pressure reducing pipe comprises a pipe body and a tubular filter element coaxially arranged in the pipe body; the material inlet of the pressure reducing pipe is used for receiving high-pressure powder materials, and the received high-pressure powder materials can enter the tubular filter element; the pipe body is provided with a gas outlet, and the gas outlet of the pipe body is connected with the pressure control valve;
the powder material conveying device (3) is used for conveying the powder material discharged from the material outlet of the decompression pipe by adopting conveying gas.
2. The continuous pressure-reducing conveying device for high-pressure powder materials as claimed in claim 1, wherein the powder material conveying device (3) comprises a first conveying gas stop valve (13), a powder collector (11), a powder material stop valve (17) and a powder material regulating valve (18);
an inlet of the first conveying gas stop valve (13) is connected with a conveying gas source, an outlet of the first conveying gas stop valve (13) is connected with a material inlet of the powder collector (11), and a material outlet of the powder collector (11) is sequentially connected with the powder material stop valve (17) and the powder material regulating valve (18); the material inlet of the powder collector (11) is also connected with the material outlet of the pressure reducing pipe.
3. The continuous pressure-reducing conveying device for high-pressure powder materials as claimed in claim 2, wherein the conveying device for powder materials (3) further comprises a second conveying gas cut-off valve (15), an inlet of the second conveying gas cut-off valve (15) is connected with a conveying gas source, and an outlet of the second conveying gas cut-off valve (15) is connected to an outlet pipeline of the powder material regulating valve (18).
4. The continuous pressure-reducing conveying device for high-pressure powder materials as claimed in claim 3, wherein the powder material conveying device (3) further comprises a fluidizing gas cut-off valve (14); one end of the fluidizing gas cut-off valve (14) is connected with the bottom of the powder collector (11), and the other end is connected to an inlet pipeline of the second conveying gas cut-off valve (15).
5. The continuous pressure-reducing conveying device for high-pressure powder materials as claimed in claim 4, wherein a fluidizing gas pipeline is connected between the top and the bottom of the powder collector (11), and a valve is arranged on the fluidizing gas pipeline.
6. The continuous pressure-reducing conveying device for high-pressure powder materials as claimed in claim 2, wherein a discharge pipeline is arranged at the bottom of the powder collector (11), and a discharge valve (12) of the powder collector is arranged on the discharge pipeline.
7. The continuous pressure-reducing conveying device for high-pressure powder materials as claimed in claim 2, wherein a pressure gauge (19) is arranged on an outlet pipeline of the powder material regulating valve (18).
8. The continuous pressure-reducing conveying device for the high-pressure powder materials as claimed in claim 1, wherein the pressure-reducing pipes comprise a plurality of pressure-reducing pipes which are arranged in series, and the pressure-controlling valves comprise a plurality of pressure-controlling valves which are arranged in one-to-one correspondence with the pressure-reducing pipes.
9. The continuous pressure-reducing conveying device for the high-pressure powder materials as claimed in claim 1, wherein the continuous pressure-reducing device (1) further comprises a gas-releasing cut-off valve (8), and an outlet of the pressure control valve is connected with the gas-releasing cut-off valve (8).
10. The continuous pressure reduction conveying device for high-pressure powder materials according to claim 1, further comprising a back-blowing cut-off valve, wherein an inlet of the back-blowing cut-off valve is connected with a back-blowing air source; the outlet pipeline of the back flushing cut-off valve is vertically connected with the pipe-in-pipe body of the pressure reducing pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122052496.5U CN215625325U (en) | 2021-08-27 | 2021-08-27 | Continuous decompression conveyor of high pressure powder material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122052496.5U CN215625325U (en) | 2021-08-27 | 2021-08-27 | Continuous decompression conveyor of high pressure powder material |
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| Publication Number | Publication Date |
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| CN215625325U true CN215625325U (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122052496.5U Active CN215625325U (en) | 2021-08-27 | 2021-08-27 | Continuous decompression conveyor of high pressure powder material |
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- 2021-08-27 CN CN202122052496.5U patent/CN215625325U/en active Active
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