CN209800272U - Backflow adjusting device suitable for liquid ring pump of thermal power plant - Google Patents
Backflow adjusting device suitable for liquid ring pump of thermal power plant Download PDFInfo
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- CN209800272U CN209800272U CN201920666461.0U CN201920666461U CN209800272U CN 209800272 U CN209800272 U CN 209800272U CN 201920666461 U CN201920666461 U CN 201920666461U CN 209800272 U CN209800272 U CN 209800272U
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Abstract
The utility model relates to a backflow adjusting device for a liquid ring pump of a thermal power plant, which comprises a liquid ring pump, wherein a first inlet of the liquid ring pump is communicated with an air inlet, a second inlet of the liquid ring pump is communicated with a heat exchanger through a liquid supply pipeline, a first outlet of the liquid ring pump is connected with a gas-liquid separator through a ball valve, the first outlet of the gas-liquid separator is respectively communicated with an air outlet and a backflow pipeline, the other end of the backflow pipeline is connected with the first inlet of the liquid ring pump, the heat exchanger is respectively connected with a cooling water inlet through a pipeline, the cooling water outlet and the gas-liquid separator, the second outlet of the liquid ring pump, the output port of the heat exchanger and the second outlet of the gas-liquid separator are all communicated with a cleaning drainage pipeline, a main liquid discharge port is connected with the cleaning drainage pipeline, the third outlet of the gas-liquid separator is connected to the main liquid discharge port through a high liquid level liquid discharge pipeline, and the third inlet of the gas-liquid separator is communicated with the main liquid inlet. The utility model provides a return flow adjusting device suitable for liquid ring pump of thermal power plant is used has ensured the steady operation of unit.
Description
Technical Field
The utility model relates to a water ring vacuum pump technical field especially relates to a backward flow adjusting device suitable for liquid ring pump of thermal power plant is used.
Background
The compressor unit for large-scale thermal power plant is composed of two original double-stage double-suction ring vacuum pumps which are connected in parallel to operate. Through the observation of the actual working condition of the compressor unit in a user, engineering technicians find that when the liquid ring pump is used as a compressor, the air input of the liquid ring pump working by the original unit is changed too much, so that the whole unit is unstable.
The problem has not been solved well.
SUMMERY OF THE UTILITY MODEL
In order to overcome prior art's the aforesaid not enough, the utility model provides a backward flow adjusting device suitable for liquid ring pump of thermal power plant is used solves the liquid ring pump air input that current two bipolar water ring vacuum pumps used the compressor and use the existence and changes too greatly, the unstable problem of unit operation.
The invention is realized by the following technical scheme:
A backflow adjusting device suitable for a liquid ring pump of a thermal power plant comprises a liquid ring pump, a heat exchanger and a gas-liquid separator, wherein a first inlet of the liquid ring pump is communicated with an air inlet through a check valve, a normally open ball valve and a gate valve which are sequentially connected, a second inlet of the liquid ring pump is communicated with the heat exchanger through a liquid supply pipeline, a first outlet of the liquid ring pump is connected with the gas-liquid separator through a normally open ball valve, a first outlet of the gas-liquid separator is respectively communicated with an exhaust port and a return pipeline, the other end of the return pipeline is connected to the first inlet of the liquid ring pump, the heat exchanger is respectively connected with a cooling water inlet, a cooling water outlet and the gas-liquid separator through pipelines, a second outlet of the liquid ring pump, an output port of the heat exchanger and a second outlet of the gas-liquid separator are all communicated with a cleaning liquid discharge pipeline, the cleaning liquid discharge pipeline is connected with a main liquid discharge port, and a, and a third inlet of the gas-liquid separator is communicated with the total liquid inlet.
furthermore, a filter screen and a pressure gauge are further arranged on a pipeline between the gate valve and the first inlet of the liquid ring pump.
Further, return line includes pneumatic control valve, pneumatic control valve's both ends parallel have the normally closed ball valve, pneumatic control valve is connected to the first entry end of liquid ring pump through the first distributed control system DCS, the pressure transmitter that connect gradually.
Further, be equipped with temperature transmitter, thermometer, pressure transmitter, flowmeter, normally open ball valve on the feed liquid pipeline, temperature transmitter connects the distributed control system DCS of second collection.
Furthermore, a third inlet normally-closed valve of the gas-liquid separator is communicated with the total liquid inlet, a normally-closed valve is arranged on the high liquid level liquid discharge pipe, the normally-closed valve at the third inlet of the gas-liquid separator and the normally-closed valve at the third outlet of the gas-liquid separator are respectively connected to a third distributed control system DCS through pipelines, the third distributed control system DCS is connected with a fourth distributed control system DCS on the one hand, and the third distributed control system DCS is connected to the gas-liquid separator through a liquid level transmitter on the other hand.
Furthermore, the gas-liquid separator is also connected with a liquid level meter and a pressure gauge.
Further, a second outlet of the liquid ring pump, an output port of the heat exchanger and a second outlet of the gas-liquid separator are respectively communicated with the cleaning liquid discharge pipeline through a normally closed ball valve.
Compared with the prior art, the beneficial effects of the utility model reside in that:
The utility model provides a backflow adjusting device suitable for liquid ring pump of thermal power plant adopts a liquid ring pump as compressor use, can adjust, control the exhaust pressure when guaranteeing compressor work through reasonable return circuit, valve design to guarantee the stability of whole compressor work; meanwhile, one liquid ring pump normally and stably operates to replace the working condition of two traditional liquid ring pumps, so that the configuration of the system is simplified, and the technical effects of energy conservation and efficiency improvement are achieved.
Drawings
Fig. 1 is the utility model discloses a return flow control device's schematic structure diagram suitable for liquid ring pump of thermal power plant is used.
In the figure:
1. A liquid ring pump; 2. a heat exchanger; 3. a gas-liquid separator; 4. a check valve; 5. a normally open ball valve; 6. a gate valve; 7. a liquid supply line; 8. a return line; 9. cleaning a liquid discharge pipeline; 10. a high liquid level drain line; 11. filtering with a screen; 12. a pressure gauge; 13. a pneumatic regulating valve; 14. a normally closed ball valve; 15. a first distributed control system DCS; 16. a pressure transmitter; 17. a temperature transmitter; 18. a thermometer; 19. a second distributed control system DCS; 20. a third distributed control system DCS; 21. a fourth distributed control system DCS; 22. a liquid level transmitter; 23. a liquid level meter; 24. a flow meter.
Detailed Description
The following examples are presented to illustrate certain embodiments of the invention and should not be construed as limiting the scope of the invention. The present disclosure may be modified from materials, methods, and reaction conditions at the same time, and all such modifications are intended to be within the spirit and scope of the present disclosure.
as shown in fig. 1, a backflow adjusting device suitable for a liquid ring pump of a thermal power plant comprises a liquid ring pump 1, a heat exchanger 2 and a gas-liquid separator 3, wherein a first inlet of the liquid ring pump 1 is communicated to an air inlet through a check valve 4, a normally open ball valve 5 and a gate valve 6 which are connected in sequence, a second inlet of the liquid ring pump 1 is communicated to the heat exchanger 2 through a liquid supply pipeline 7, a first outlet of the liquid ring pump 1 is connected to the gas-liquid separator 3 through the normally open ball valve 5, a first outlet of the gas-liquid separator 3 is respectively communicated to an air outlet and a backflow pipeline 8, the other end of the backflow pipeline 8 is connected to the first inlet of the liquid ring pump 1, the heat exchanger 2 is respectively connected to a cooling water inlet, a cooling water outlet and the gas-liquid separator 3 through pipelines, a second outlet of the liquid ring pump 1, an output port of the heat exchanger 2 and a second outlet of the, the liquid ring pump 1 is connected with a motor through a coupler, the cleaning drainage pipeline 9 is connected with a total liquid discharge port, a third outlet of the gas-liquid separator 3 is connected with the total liquid discharge port through a high liquid level drainage pipeline 10, and a third inlet of the gas-liquid separator 3 is communicated with a total liquid inlet.
And a filter screen 11 and a pressure gauge 12 are further arranged on a pipeline between the gate valve 6 and the first inlet of the liquid ring pump 1.
The return line 8 comprises a pneumatic control valve 13, the two ends of the pneumatic control valve 13 are connected in parallel with a normally closed ball valve 14, and the pneumatic control valve 13 is connected to a first inlet end of the liquid ring pump 1 through a first distributed control system DCS15 and a pressure transmitter 16 which are connected in sequence.
And a temperature transmitter 17, a thermometer 18, a pressure transmitter 16, a flowmeter 24 and a normally open ball valve 5 are arranged on the liquid supply pipeline 7, and the temperature transmitter 17 is connected with a second distributed control system DCS 19.
The third inlet of the gas-liquid separator 3 is a normally closed valve communicated with the total liquid inlet, a normally closed valve is arranged on the high liquid level liquid discharge pipe, the normally closed valve at the third inlet of the gas-liquid separator 3 and the normally closed valve at the third outlet of the gas-liquid separator 3 are respectively connected to a third distributed control system DCS20 through pipelines, and the third distributed control system DCS20 is connected with a fourth distributed control system DCS21 on one hand and is connected to the gas-liquid separator 3 through a liquid level transmitter 22 on the other hand.
The gas-liquid separator 3 is also connected with a liquid level meter 23 and a pressure gauge 12, so that the pressure and the temperature in the gas-liquid separator 3 are stable.
And a second outlet of the liquid ring pump 1, an output port of the heat exchanger 2 and a second outlet of the gas-liquid separator 3 are respectively communicated with the cleaning liquid discharge pipeline 9 through a normally closed ball valve 14.
The method specifically works as follows: gas enters the liquid ring pump 1 from an air inlet through other valves such as a gate valve 6, a filter screen 11 and a pressure gauge 12, the gas enters the gas-liquid separator 3 after being compressed and boosted by the liquid ring pump 1, one part of the gas coming out of the gas-liquid separator 3 is discharged from an exhaust port, the other part of the gas enters the liquid ring pump 1 again through a return pipeline 8, water discharged from the bottom of the gas-liquid separator 3 is cooled through the heat exchanger 2 and then returns to the liquid ring pump 1 for cyclic utilization, the heat exchanger 2 is connected with a cooling water inlet and a cooling water outlet through pipelines, the cooling liquid of the internal temperature of the heat exchanger 2 is guaranteed to be kept in a reasonable range all the time, and the liquid discharged from the liquid ring pump 1, the heat exchanger 2 and the gas-liquid separator 3 is discharged from a liquid discharge port.
In conclusion, one liquid ring pump is used as a compressor, and the discharge pressure can be regulated and controlled during the operation of the compressor through reasonable loop and valve design, so that the working stability of the whole compressor is ensured; meanwhile, one liquid ring pump normally and stably operates to replace the working condition of two traditional liquid ring pumps, so that the configuration of the system is simplified, and the technical effects of energy conservation and efficiency improvement are achieved.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (7)
1. The backflow adjusting device is characterized by comprising a liquid ring pump (1), a heat exchanger (2) and a gas-liquid separator (3), wherein a first inlet of the liquid ring pump (1) is communicated with an air inlet through a check valve (4), a normally open ball valve (5) and a gate valve (6) which are sequentially connected, a second inlet of the liquid ring pump (1) is communicated with the heat exchanger (2) through a liquid supply pipeline (7), a first outlet of the liquid ring pump (1) is connected to the gas-liquid separator (3) through the normally open ball valve (5), a first outlet of the gas-liquid separator (3) is respectively communicated with an air outlet and a backflow pipeline (8), the other end of the backflow pipeline (8) is connected to the first inlet of the liquid ring pump (1), the heat exchanger (2) is respectively connected with a cooling water inlet, a cooling water outlet and the gas-liquid separator (3) through pipelines, the second outlet of the liquid ring pump (1), the output port of the heat exchanger (2) and the second outlet of the gas-liquid separator (3) are communicated with a cleaning drainage pipeline (9), the cleaning drainage pipeline (9) is connected with a total liquid discharge port, the third outlet of the gas-liquid separator (3) is connected with the total liquid discharge port through a high liquid level drainage pipeline (10), and the third inlet of the gas-liquid separator (3) is communicated with the total liquid inlet.
2. The backflow adjusting device for the liquid ring pump of the thermal power plant is characterized in that a filter screen (11) and a pressure gauge (12) are further arranged on a pipeline between the gate valve (6) and the first inlet of the liquid ring pump (1).
3. The backflow regulating device suitable for the liquid ring pump of the thermal power plant is characterized in that the backflow pipeline (8) comprises a pneumatic regulating valve (13), both ends of the pneumatic regulating valve (13) are connected with a normally closed ball valve (14) in parallel, and the pneumatic regulating valve (13) is connected to the first inlet end of the liquid ring pump (1) through a first distributed control system DCS (15) and a pressure transmitter (16) which are connected in sequence.
4. The backflow adjusting device suitable for the liquid ring pump of the thermal power plant according to claim 1, wherein a temperature transmitter (17), a thermometer (18), a pressure transmitter (16), a flowmeter (24) and a normally open ball valve (5) are arranged on the liquid supply pipeline (7), and the temperature transmitter (17) is connected with a second distributed control system DCS (19).
5. The backflow regulating device for the liquid ring pump in the thermal power plant according to claim 1, wherein the third inlet of the gas-liquid separator (3) is connected to the main liquid inlet through a normally closed valve, the high liquid level drain pipe is provided with a normally closed valve, the normally closed valve at the third inlet of the gas-liquid separator (3) and the normally closed valve at the third outlet of the gas-liquid separator (3) are respectively connected to a third distributed control system DCS (20) through a pipeline, and the third distributed control system DCS (20) is connected to the fourth distributed control system DCS (21) on one hand and to the gas-liquid separator (3) through a liquid level transmitter (22) on the other hand.
6. The backflow regulating device suitable for the liquid ring pump of the thermal power plant is characterized in that a liquid level meter (23) and a pressure gauge (12) are further connected to the gas-liquid separator (3).
7. The backflow regulating device suitable for the liquid ring pump of the thermal power plant is characterized in that the second outlet of the liquid ring pump (1), the output port of the heat exchanger (2) and the second outlet of the gas-liquid separator (3) are respectively communicated with the cleaning drainage pipeline (9) through a normally closed ball valve (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920666461.0U CN209800272U (en) | 2019-05-10 | 2019-05-10 | Backflow adjusting device suitable for liquid ring pump of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920666461.0U CN209800272U (en) | 2019-05-10 | 2019-05-10 | Backflow adjusting device suitable for liquid ring pump of thermal power plant |
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| Publication Number | Publication Date |
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| CN209800272U true CN209800272U (en) | 2019-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920666461.0U Active CN209800272U (en) | 2019-05-10 | 2019-05-10 | Backflow adjusting device suitable for liquid ring pump of thermal power plant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115653901A (en) * | 2022-11-29 | 2023-01-31 | 淄博水环真空泵厂有限公司 | Flow regulating system of gas extraction pump |
| GB2615836A (en) * | 2022-02-17 | 2023-08-23 | Edwards Tech Vacuum Engineering Qingdao Company Limited | System and method for cleaning a liquid ring pump system |
-
2019
- 2019-05-10 CN CN201920666461.0U patent/CN209800272U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2615836A (en) * | 2022-02-17 | 2023-08-23 | Edwards Tech Vacuum Engineering Qingdao Company Limited | System and method for cleaning a liquid ring pump system |
| CN115653901A (en) * | 2022-11-29 | 2023-01-31 | 淄博水环真空泵厂有限公司 | Flow regulating system of gas extraction pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A reflux regulating device suitable for liquid ring pump in thermal power plant Effective date of registration: 20220713 Granted publication date: 20191217 Pledgee: Bank of China Limited Wuhan Municipal sub branch Pledgor: WUHAN EDW PUMP & VALVE CO.,LTD. Registration number: Y2022420000226 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |