CN220250718U - Energy-saving vacuum lifting unit with multiple back pressure condensers - Google Patents
Energy-saving vacuum lifting unit with multiple back pressure condensers Download PDFInfo
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- CN220250718U CN220250718U CN202322192048.4U CN202322192048U CN220250718U CN 220250718 U CN220250718 U CN 220250718U CN 202322192048 U CN202322192048 U CN 202322192048U CN 220250718 U CN220250718 U CN 220250718U
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- 238000002955 isolation Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 54
- 239000007788 liquid Substances 0.000 claims description 29
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 210000001503 joint Anatomy 0.000 claims description 5
- 238000005086 pumping Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 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 an energy-saving vacuum lifting unit with multiple back pressure condensers, which comprises a low back pressure side condenser, a secondary high pressure side condenser and a high pressure side condenser, wherein the low back pressure side condenser, the secondary high pressure side condenser and the high pressure side condenser are fixedly provided with the same total isolation valve through pipelines.
Description
Technical Field
The utility model relates to the technical field of condensers, in particular to an energy-saving vacuum lifting unit of a multi-backpressure condenser.
Background
At present, all condensers equipped with the supercritical or ultra-supercritical generator set are multi-backpressure condensers, generally double backpressure condensers, and a few are three backpressure condensers. The generator set generally comprises a single condenser, a water ring type vacuum pump for maintaining vacuum and a redundant condenser for standby. For example, a double back pressure condenser is provided with three water ring vacuum pumps with 50% capacity, during normal operation, two water ring vacuum pumps with 50% capacity respectively maintain the vacuum of the single-side condenser, and a third water ring vacuum pump is in a standby state. The three back pressure condensers are provided with four water ring vacuum pumps with 50% capacity, and in normal operation, the three water ring vacuum pumps with 50% capacity respectively maintain the vacuum of the single-side condenser, and the fourth water ring vacuum pump is in a standby state. Because the water ring vacuum pump is greatly influenced by the temperature of the working fluid and the vacuum degree of the inlet, the water temperature and the vacuum degree of the inlet have great influence on the efficiency of the water ring vacuum pump, the water ring vacuum pump has low efficiency when normally maintaining vacuum, especially in summer, and for this reason, many power plants do not reach the ideal vacuum degree.
In the prior art, two or three sets of Roots liquid ring vacuum pump sets are equipped for maintaining the vacuum of the single-side condenser respectively in recent parts of multi-back pressure condensers, so that the effect of saving energy compared with a water ring vacuum pump is expected to be achieved, but the result is that the electricity is saved by reducing the pumping speed and sacrificing the vacuum, and the generating efficiency of a generator set is directly and closely related with the vacuum degree of the condenser, so that according to the analysis of an electric power research institute, the coal consumption can be reduced by about 2g/kW.h every time the vacuum of a power plant set is increased by 1 kpa. Obviously, the vacuum is sacrificed to replace the electricity saving and energy saving, which is not advisable or advisable. At present, the electric power industry market has urgent demands on the multi-backpressure condenser energy-saving vacuum lifting unit, so that the multi-backpressure condenser energy-saving vacuum lifting unit is provided for solving the problems.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides an energy-saving vacuum lifting unit with multiple back pressure condensers.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides an energy-conserving vacuum lift unit of many backpressure condensers, includes low backpressure side condenser, secondary high pressure side condenser and high pressure side condenser, there is same total isolation valve through pipeline fixed mounting between low backpressure side condenser, secondary high pressure side condenser and the high pressure side condenser, there is pneumatic butterfly valve one end of total isolation valve through pipeline fixed mounting, pneumatic butterfly valve's one end is through pipeline fixed mounting there is first roots vacuum pump, first roots vacuum pump's one end is through pipeline fixed mounting there is first tubular heat exchanger, first tubular heat exchanger's one end is through pipeline fixed mounting there is the second roots vacuum pump, second roots vacuum pump one end is through pipeline fixed mounting there is the second tubular heat exchanger, second tubular heat exchanger's one end is through pipeline fixed mounting there is the third roots vacuum pump, third roots vacuum pump's one end is through pipeline fixed mounting there is the third tubular heat exchanger, first roots vacuum steam trap of outer wall through pipeline fixed mounting there is first roots vacuum steam trap, second tubular heat exchanger's outer wall is through pipeline fixed mounting there is first vacuum trap on-line first vacuum trap and online first vacuum trap.
Preferably, the collecting mechanism condensate liquid collecting tank, the first vacuum online steam trap and the second vacuum online steam trap are fixedly communicated with the outer wall of the condensate liquid collecting tank through pipelines, the low back pressure side condenser, the secondary high pressure side condenser and the outer wall of the high pressure side condenser are fixedly provided with the same multi-stage water seal through pipelines, one end of the multi-stage water seal is fixedly provided with a shaft seal cooler through a pipeline, the condensate liquid collecting tank is provided with a liquid level transmitter, and once the liquid level reaches a set value, the centrifugal pump is started.
Preferably, the outer wall of the low back pressure side condenser is fixedly provided with a first isolation valve through a pipeline, the outer wall of the secondary high pressure side condenser is fixedly provided with a first regulating valve through a pipeline, and the outer wall of the high pressure side condenser is fixedly provided with a second regulating valve through a pipeline.
Preferably, one end of the third tubular heat exchanger is fixedly provided with a water ring pump through a pipeline, the outlet end of the water ring pump is fixedly provided with a gas-liquid separator through a pipeline, the first vacuum on-line steam trap and the second vacuum on-line steam trap are in butt joint with the gas-liquid separator through a pipeline, and the gas-liquid separator collects condensed water condensed by saturated steam of the suction condenser of the multi-backpressure condenser energy-saving vacuum lifting unit.
Preferably, a first vacuum pneumatic valve and a second vacuum pneumatic valve are fixedly arranged between the first vacuum online steam trap and the second vacuum online steam trap through pipelines.
Preferably, the same centrifugal pump is fixedly arranged between the shaft seal cooler and the condensate liquid collecting tank through a pipeline.
Compared with the prior art, the utility model has the advantages that:
according to the scheme, the first tube type heat exchanger is arranged at the exhaust port of the first Roots vacuum pump, the second tube type heat exchanger is arranged at the exhaust port of the second Roots vacuum pump, water draining ports are reserved at the bottoms of the first tube type heat exchanger and the second tube type heat exchanger, the two water draining ports are respectively in butt joint with the first vacuum online steam trap and the second vacuum online steam trap, the phenomenon that the impact is caused by the first vacuum online steam trap and the second vacuum online steam trap after water is drained and the energy-saving vacuum lifting unit with multiple backpressure condensers is integrated, and meanwhile, the large-sized vacuum equipment is integrated, so that the waste of basic energy consumption is avoided;
the collected condensed water is conveyed to a shaft seal cooler of the turbo generator set by starting a centrifugal pump, and is returned to the low back pressure side condenser, the secondary high pressure side condenser or the high pressure side condenser through a multi-stage water seal under the shaft seal cooler, so that the condensed water is saved, the waste of precious condensed water is avoided, and meanwhile, the pipeline blockage is avoided, and the vacuumizing performance is influenced;
the first Roots vacuum pump, the second Roots vacuum pump and the third Roots vacuum pump are all provided with variable frequency motor control, and as the original multi-backpressure condenser runs at least two water ring vacuum pumps, the whole set of multi-backpressure condenser energy-saving vacuum lifting unit is superior in electricity saving, is provided with variable frequency control, and realizes energy saving.
Drawings
Fig. 1 is a schematic diagram of an installation structure of an energy-saving vacuum lifting unit with multiple back pressure condensers.
In the figure: 1. a low back pressure side condenser; 2. a secondary high pressure side condenser; 3. a high-pressure side condenser; 4. a first isolation valve; 5. a first regulating valve; 6. a second regulating valve; 7. a main isolation valve; 8. pneumatic butterfly valve; 9. a first Roots vacuum pump; 10. a first tubular heat exchanger; 11. a second Roots vacuum pump; 12. a second tubular heat exchanger; 13. a third Roots vacuum pump; 14. a third tube heat exchanger; 15. a water ring pump; 16. a gas-liquid separator; 17. a first vacuum on-line steam trap; 18. a second vacuum on-line steam trap; 19. a first vacuum pneumatic valve; 20. a second vacuum pneumatic valve; 21. a condensate liquid collecting tank; 22. multistage water seal; 23. a shaft seal cooler; 24. and (3) a centrifugal pump.
Detailed Description
The utility model provides a shown by FIG. 1, relate to energy-conserving vacuum lift unit of many backpressure condensers, including low backpressure side condenser 1, secondary high pressure side condenser 2 and high pressure side condenser 3, the outer wall of low backpressure side condenser 1 is through pipeline fixed mounting has first isolation valve 4, first isolation valve 4 only has two kinds of states of full opening and full closing, the outer wall of secondary high pressure side condenser 2 is through pipeline fixed mounting has first governing valve 5, the outer wall of high pressure side condenser 3 is through pipeline fixed mounting has second governing valve 6, first governing valve 5, second governing valve 6 can be according to secondary high pressure side condenser 2 and high pressure side condenser 3 backpressure value needs, the adjustment valve aperture.
The low back pressure side condenser 1, the secondary high pressure side condenser 2 and the high pressure side condenser 3 are fixedly provided with the same total isolation valve 7 through a pipeline, one end of the total isolation valve 7 is fixedly provided with a pneumatic butterfly valve 8 through a pipeline, the pneumatic butterfly valve 8 is arranged at the inlet end of the first Roots vacuum pump 9, the total isolation valve 7 is used for double isolation, a vacuum-pumping branch pipe is separated from a vacuum-pumping main pipe, and the total isolation valve is respectively connected with the low back pressure side condenser 1, the secondary high pressure side condenser 2 and the high pressure side condenser 3.
One end of the pneumatic butterfly valve 8 is fixedly provided with a first Roots vacuum pump 9 through a pipeline, one end of the first Roots vacuum pump 9 is fixedly provided with a first tubular heat exchanger 10 through a pipeline, one end of the first tubular heat exchanger 10 is fixedly provided with a second Roots vacuum pump 11 through a pipeline, one end of the second Roots vacuum pump 11 is fixedly provided with a second tubular heat exchanger 12 through a pipeline, one end of the second tubular heat exchanger 12 is fixedly provided with a third Roots vacuum pump 13 through a pipeline, one end of the third Roots vacuum pump 13 is fixedly provided with a third tubular heat exchanger 14 through a pipeline, and variable frequency motors which are all provided with the first Roots vacuum pump 9, the second Roots vacuum pump 11 and the third Roots vacuum pump 13 are controlled.
The vacuumizing branch pipes on the first Roots vacuum pump 9, the second Roots vacuum pump 11 and the third Roots vacuum pump 13 are sequentially connected with the vacuumizing main pipe, so that the pressure gradient is maintained, and the internal air leakage of the vacuumizing pipeline is avoided.
The pumping speeds of the first Roots vacuum pump 9, the second Roots vacuum pump 11 and the third Roots vacuum pump 13 are sequentially arranged from big to small, the pumping speed compression ratio is not more than 4:1 at maximum, and the first Roots vacuum pump 9, the second Roots vacuum pump 11 and the third Roots vacuum pump 13 are used for cooling exhaust gas through the first tubular heat exchanger 10, the second tubular heat exchanger 12 and the third tubular heat exchanger 14 when in operation and the exhaust is carried out in the moment of recent compression of gas. Wherein the non-condensable gas is volume contracted and the saturated water vapor is condensed into water.
One end of the third tubular heat exchanger 14 is fixedly provided with a water ring pump 15 through a pipeline, the outlet end of the water ring pump 15 is fixedly provided with a gas-liquid separator 16 through a pipeline, a first vacuum online steam trap 17 is in butt joint with the gas-liquid separator 16 through a pipeline between a second vacuum online steam trap 18, and the first vacuum online steam trap 17 and the second vacuum online steam trap 18 and the gas-liquid separator 16 collect condensed water condensed by saturated steam of a suction condenser of the multi-backpressure condenser energy-saving vacuum lifting unit.
The outer wall of the first tubular heat exchanger 10 is fixedly provided with a first vacuum online steam trap 17 through a pipeline, the outer wall of the second tubular heat exchanger 12 is fixedly provided with a second vacuum online steam trap 18 through a pipeline, and one ends of the first vacuum online steam trap 17 and the second vacuum online steam trap 18 are provided with a collecting mechanism.
A first vacuum pneumatic valve 19 and a second vacuum pneumatic valve 20 are fixedly arranged between the first vacuum online steam trap 17 and the second vacuum online steam trap 18 through pipelines.
The condensate liquid collecting tank 21 of the collecting mechanism is fixedly communicated with the outer wall of the condensate liquid collecting tank 21 through a pipeline between the first vacuum online steam trap 17 and the second vacuum online steam trap 18, the same multi-stage water seal 22 is fixedly arranged on the outer walls of the low back pressure side condenser 1, the secondary high pressure side condenser 2 and the high pressure side condenser 3 through pipelines, and condensed water returns to the low back pressure side condenser 1 through the multi-stage water seal 22.
One end of the multi-stage water seal 22 is fixedly provided with a shaft seal cooler 23 through a pipeline, the shaft seal cooler 23 is connected with the low back pressure side condenser 1 and the secondary high pressure side condenser 2 through the multi-stage water seal 22 and the high pressure side condenser 6 to recover condensed water, the shaft seal cooler 23 and the condensed liquid collecting tank 21 are fixedly provided with the same centrifugal pump 24 through a pipeline, and the centrifugal pump 24 can be started when the liquid level of the condensed liquid collecting tank 21 reaches a set position.
Working principle: when the multi-back pressure condenser energy-saving vacuum lifting unit is used, the first tube heat exchanger 10 is arranged at the exhaust port of the first Roots vacuum pump 9, the second tube heat exchanger 12 is arranged at the exhaust port of the second Roots vacuum pump 11, water draining ports are reserved at the bottoms of the first tube heat exchanger 10 and the second tube heat exchanger 12, the two water draining ports are respectively in butt joint with the first vacuum online steam trap 17 and the second vacuum online steam trap 18, so that the impact of the first vacuum online steam trap 17 and the second vacuum online steam trap 18 on the energy-saving vacuum lifting unit with multiple back pressure condensers after water draining is avoided, and the first vacuum online steam trap 17 and the second vacuum online steam trap 18 are provided with a pre-vacuumizing pipe connected with the inlet of the water ring pump 15; the first vacuum online steam trap 17 and the second vacuum online steam trap 18 and the gas-liquid separator 16 collect condensed water condensed by saturated steam of the multi-backpressure condenser energy-saving vacuum lifting unit, the condensed water is discharged into the condensed liquid collecting tank 21, a liquid level transmitter is arranged on the condensed liquid collecting tank 21, once the liquid level reaches a set value, the centrifugal pump 24 is started, the collected condensed water is conveyed to the shaft seal cooler 23 of the turbo generator unit, the condensed water is returned to the low backpressure side condenser 1, the secondary high pressure side condenser 2 or the high pressure side condenser 3 through the multistage water seal 22 under the shaft seal cooler 23, the condensed water is saved, waste of precious condensed water is not caused, the pumping speed of the first Roots vacuum pump 9 is maximum, the installed power of the whole multi-backpressure condenser energy-saving vacuum lifting unit is not higher than that of a single water ring vacuum pump equipped by the original condenser, the first Roots vacuum pump 9, the second Roots vacuum pump 11 and the third Roots vacuum lifting unit are all controlled by a variable frequency motor equipped by the multi-backpressure vacuum lifting unit, the multi-backpressure condenser is far higher than that of the original vacuum lifting unit in the aspect of the energy-saving vacuum lifting unit, and the multi-backpressure vacuum lifting unit is superior to the original vacuum lifting unit because of the multi-backpressure condenser is pumped by the multi-backpressure condenser energy-backpressure vacuum lifting unit.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art will be able to apply equally to the technical solution of the present utility model and the inventive concept thereof, within the scope of the present utility model.
Claims (6)
1. The multi-backpressure condenser energy-saving vacuum lifting unit comprises a low backpressure side condenser (1), a secondary high pressure side condenser (2) and a high pressure side condenser (3), and is characterized in that the same main isolation valve (7) is fixedly arranged between the low backpressure side condenser (1), the secondary high pressure side condenser (2) and the high pressure side condenser (3) through pipelines, one end of the main isolation valve (7) is fixedly provided with a pneumatic butterfly valve (8) through pipelines, one end of the pneumatic butterfly valve (8) is fixedly provided with a first Roots vacuum pump (9) through pipelines, one end of the first Roots vacuum pump (9) is fixedly provided with a first tubular heat exchanger (10) through pipelines, one end of the first tubular heat exchanger (10) is fixedly provided with a second Roots vacuum pump (11) through pipelines, one end of the second Roots vacuum pump (11) is fixedly provided with a second tubular heat exchanger (12) through pipelines, one end of the second tubular heat exchanger (12) is fixedly provided with a third Roots vacuum pump (13) through pipelines, one end of the third Roots vacuum pump (13) is fixedly provided with a first tubular heat exchanger (18) through pipelines, one end of the first tubular heat exchanger (14) is fixedly provided with a second tubular heat exchanger (12) through pipelines, and a collecting mechanism is arranged at one end of the first vacuum online steam trap (17) and one end of the second vacuum online steam trap (18).
2. The multi-backpressure condenser energy-saving vacuum lifting unit according to claim 1, wherein the collecting mechanism condensate liquid collecting tank (21) is fixedly communicated with the outer wall of the condensate liquid collecting tank (21) through a pipeline between the first vacuum online steam trap (17) and the second vacuum online steam trap (18), the same multi-stage water seal (22) is fixedly installed on the outer walls of the low backpressure condenser (1), the secondary high pressure condenser (2) and the high pressure condenser (3) through pipelines, and a shaft seal cooler (23) is fixedly installed at one end of the multi-stage water seal (22) through a pipeline.
3. The multi-backpressure condenser energy-saving vacuum lifting unit according to claim 1, wherein a first isolation valve (4) is fixedly arranged on the outer wall of the low backpressure side condenser (1) through a pipeline, a first regulating valve (5) is fixedly arranged on the outer wall of the secondary high pressure side condenser (2) through a pipeline, and a second regulating valve (6) is fixedly arranged on the outer wall of the high pressure side condenser (3) through a pipeline.
4. The multi-backpressure condenser energy-saving vacuum lifting unit according to claim 1, wherein one end of the third tubular heat exchanger (14) is fixedly provided with a water ring pump (15) through a pipeline, an outlet end of the water ring pump (15) is fixedly provided with a gas-liquid separator (16) through a pipeline, and the first vacuum online steam trap (17) is in butt joint with the second vacuum online steam trap (18) through a pipeline.
5. The multi-backpressure condenser energy-saving vacuum lifting unit according to claim 2, wherein a first vacuum pneumatic valve (19) and a second vacuum pneumatic valve (20) are fixedly arranged between the first vacuum online steam trap (17) and the second vacuum online steam trap (18) through pipelines.
6. The multi-backpressure condenser energy-saving vacuum lifting unit according to claim 2, wherein the same centrifugal pump (24) is fixedly arranged between the shaft seal cooler (23) and the condensate liquid collecting tank (21) through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322192048.4U CN220250718U (en) | 2023-08-15 | 2023-08-15 | Energy-saving vacuum lifting unit with multiple back pressure condensers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322192048.4U CN220250718U (en) | 2023-08-15 | 2023-08-15 | Energy-saving vacuum lifting unit with multiple back pressure condensers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220250718U true CN220250718U (en) | 2023-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322192048.4U Active CN220250718U (en) | 2023-08-15 | 2023-08-15 | Energy-saving vacuum lifting unit with multiple back pressure condensers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220250718U (en) |
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2023
- 2023-08-15 CN CN202322192048.4U patent/CN220250718U/en active Active
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