Vacuum-pumping system for condenser of power station

Abstract

The utility model aims to provide a vacuum-pumping system for a condenser of a power station, which solves the problem of large water replenishing amount in vacuum-pumping, and comprises a water ring vacuum assembly, a steam-water separation assembly and a heat exchange assembly, the water ring vacuum assembly comprises a first pipeline, a water ring vacuum pump and a motor, the rotating end of the water ring vacuum pump is connected with the driving end of the motor, and the steam-water separation assembly is connected with the heat exchange assembly. The first end of the first pipeline is used for being communicated with a condenser, and the second end of the first pipeline is communicated with the water ring vacuum pump. The steam-water separation assembly comprises a steam-water separator, a second pipeline and an exhaust pipe, the two ends of the second pipeline are communicated with the water ring vacuum pump and the steam-water separator respectively, and the exhaust pipe is arranged on the steam-water separator; the heat exchange assembly comprises a liquid inlet pipe, a liquid outlet pipe and a heat exchanger, the two ends of the liquid inlet pipe are communicated with the steam-water separator and the heat exchanger respectively, and the two ends of the liquid outlet pipe are communicated with the liquid outlet pipe and the water ring vacuum pump respectively.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of condenser vacuum, in particular to a kind of for power station condenser vacuum pumping system. BACKGROUND

[0002] 12MW power turbine condenser vacuum pumping equipment originally adopts is water jet steam ejector system, since water jet pump operates heat generation by friction of working water and pipe wall and the heat of extracted gas mixture can make working water temperature gradually increase, influence the working efficiency of air ejector, so in normal operation, low-temperature water needs to be constantly injected into water jet tank, to prevent working water temperature from being too high, especially in hot weather, water supplement reaches 15-20t / h.High-temperature weather condenser vacuum is only about-86Kpa, affect the power generation efficiency of entire steam turbine unit.

[0003] Current 12MW power generation adds two waste heat boilers, and after increasing load, higher requirement is had to the vacuum degree of steam turbine condenser, and the improvement of power generation efficiency must satisfy the vacuum degree requirement of system design.

[0004] Water jet steam ejector has been used for more than ten years, and noise and vibration generated during operation are very large, and there is noise pollution problem.And there is the problem of water pump packing leakage during operation, and it needs to be maintained frequently. CONTENT OF UTILITY MODEL

[0005] The utility model aims at providing a kind of for power station condenser vacuum pumping system, solve the problem of much vacuum water supplement.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0007] The utility model provides a kind of for power station condenser vacuum pumping system, including water ring vacuum component, steam-water separation component and heat exchange component,

[0008] The water ring vacuum component includes first pipeline, water ring vacuum pump and motor, the water ring vacuum pump rotating end is connected with the motor driving end, the first end of the first pipeline is used to communicate condenser, the second end of the first pipeline is communicated with the water ring vacuum pump;

[0009] The steam-water separation component includes steam-water separator, second pipeline and exhaust pipe, the second pipeline two ends are communicated with the water ring vacuum pump and the steam-water separator respectively, and the exhaust pipe is arranged on the steam-water separator;

[0010] The heat exchange component includes liquid inlet pipe, liquid outlet pipe and heat exchanger, the liquid inlet pipe two ends are communicated with the steam-water separator and the heat exchanger respectively, and the liquid outlet pipe two ends are communicated with the liquid outlet pipe and the water ring vacuum pump respectively.

[0011] Optionally, the water ring vacuum assembly further comprises an inlet filter screen and a first electromagnetic valve, both of which are arranged on the first pipeline, and the first electromagnetic valve is arranged between the inlet filter screen and the water ring vacuum pump.

[0012] Further, the water ring vacuum assembly further comprises a check valve, a first stop valve and a vacuum gauge, the check valve and the vacuum gauge are arranged on the first pipeline, the check valve is located between the vacuum gauge and the first electromagnetic valve, and the first stop valve is arranged on a test end of the vacuum gauge.

[0013] Further, the water ring vacuum assembly further comprises a first pressure device and a second pressure device, both of which are arranged on the first pipeline, and the first valve is located between the first pressure device and the second pressure device.

[0014] Optionally, the steam-water separation assembly further comprises a water supplement pipe and a bypass water pipe, a first end of the water supplement pipe is used to communicate with a water source, the water supplement pipe communicates with the steam-water separator, a second electromagnetic valve is arranged on the water supplement pipe, both ends of the bypass water pipe are respectively connected to the water supplement pipe and the steam-water separator, a first valve is arranged on the bypass water pipe, the second electromagnetic valve is used to start and stop a water outlet end of the water supplement pipe, and the bypass water pipe communicates with the water source through the water supplement pipe.

[0015] Further, the steam-water separation assembly further comprises a water supplement pressure reducing valve and a water supplement filter, both of which are arranged on the water supplement pipe, the pressure reducing valve is located between the second electromagnetic valve and the water supplement filter, and the bypass water pipe is connected between the second electromagnetic valve and the pressure reducing valve.

[0016] Further, the steam-water separation assembly further comprises a liquid level meter, a high water level alarm and a low water level alarm, all of which are arranged on the steam-water separator, and the high water level alarm is arranged above the low water level alarm.

[0017] Optionally, the heat exchange assembly further comprises a second stop valve and a pressure gauge, the pressure gauge is arranged on the liquid outlet pipe, and the second stop valve is arranged on the pressure gauge.

[0018] Optionally, the heat exchange assembly further comprises a spray pipe and a spray nozzle, both ends of the spray pipe are respectively connected to the liquid outlet pipe and the first pipeline, and the spray nozzle is arranged on the spray pipe.

[0019] Optionally, the heat exchange assembly further comprises a first temperature gauge and a second temperature gauge, the first temperature gauge is arranged on the liquid inlet pipe, and the second temperature gauge is arranged on the liquid outlet pipe.

[0020] Compared with the prior art, the power station condenser vacuum pumping system has the following advantages:

[0021] The water ring vacuum pump pumps steam, and the steam contains water; the steam is separated into gas and liquid in the steam-water separation device; when the water in the steam-water separation device is reduced, the water is appropriately supplemented; the separated liquid is cooled by the heat exchanger; the cooled liquid is returned to the water ring vacuum pump again, so that the liquid and the gas are mixed to form steam; the steam is separated into gas and liquid in the steam-water separation device; the liquid is recycled; and the water supplementing amount is reduced, so that the problem of large water supplementing amount in vacuum pumping is solved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Some specific embodiments of the utility model will be described in detail below with reference to the accompanying drawings in an exemplary but not limiting manner. The same reference signs in the drawings indicate the same or similar components or parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the drawings:

[0023] Figure 1 is a structural schematic view of a power station condenser vacuum pumping system according to a preferred embodiment of the utility model;

[0024] Figure 2 is Figure 1 the steam-water separation assembly is shown in the enlarged connection schematic view;

[0025] Figure 3 is the enlarged view of the heat exchange assembly.

[0026] In the drawings, the reference signs are explained as follows:

[0027] 1, water ring vacuum assembly; 2, steam-water separation assembly; 3, heat exchange assembly; 4, total drain pipe; 11, first pipeline; 12, water ring vacuum pump; 13, motor; 14, inlet filter screen; 15, first electromagnetic valve; 16, check valve; 17, first stop valve; 18, vacuum gauge; 19, first capillary tube; 20, liquid level meter; 21, steam-water separation device; 22, second pipeline; 23, exhaust pipe; 24, water supplementing pipe; 25, bypass water pipe; 26, second electromagnetic valve; 27, first valve; 28, pressure reducing valve; 29, water supplementing filter; 31, liquid inlet pipe; 32, liquid outlet pipe; 33, heat exchanger; 34, second stop valve; 35, pressure gauge; 36, spray pipe; 37, nozzle; 38, second capillary tube; 39, connecting pipe; 40, second valve; 121, first drain pipe; 123, third valve; 151, first pressure device; 152, second pressure device; 211, high water level alarm; 212, low water level alarm; 221, second drain pipe; 222, fourth valve; 311, first temperature gauge; 312, second temperature gauge; 331, cooling water inlet pipe; 332, cooling water outlet pipe. DETAILED DESCRIPTION

[0028] The technical solutions of the utility model will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are some of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the protection scope of the utility model.

[0029] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the description purpose, and cannot be understood as indicating or implying the relative importance.

[0030] In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0031] As shown in Figure 1 and Figure 2 and Figure 3 A kind of for power station condenser vacuum extraction system, including water ring vacuum component 1, steam-water separation component 2 and heat exchange component 3, water ring vacuum component 1 is used to extract vacuum, steam-water separation component 2 is used to separate gas and liquid, heat exchange component 3 is used for liquid cooling, the system further includes PLC controller (not shown in the figure).

[0032] Water ring vacuum component 1 includes first pipeline 11, water ring vacuum pump 12 and motor 13, water ring vacuum pump 12 rotating end is connected with the driving end of motor 13, the first end of first pipeline 11 is used to communicate condenser, first pipeline 11 extracts vacuum from condenser, the second end of first pipeline 11 is communicated with water ring vacuum pump 12, motor 13 rotates and drives water ring vacuum pump 12 to extract vacuum, water ring vacuum pump 12 extracts vacuum from condenser by first pipeline 11, motor 13 is signal connected with PLC controller, and PLC controller is used to start and stop motor 13, and the driving end of motor 13 is connected with the rotating end of water ring vacuum pump 12 by coupling.

[0033] The water ring vacuum assembly 1 further comprises an inlet filter screen 14 and a first electromagnetic valve 15, both of which are arranged on the first pipeline 11, and the first electromagnetic valve 15 is arranged between the inlet filter screen 14 and the water ring vacuum pump 12, the inlet filter screen 14 is used for filtering gas, and the first electromagnetic valve 15 is signal connected with a PLC controller, and the PLC controller is used for starting and stopping the first electromagnetic valve 15.

[0034] The water ring vacuum assembly 1 further comprises a check valve 16, a first stop valve 17 and a vacuum gauge 18, the check valve 16 and the vacuum gauge 18 are arranged on the first pipeline 11, the check valve 16 is used for preventing backflow of gas, and the vacuum gauge 18 is used for detecting the vacuum degree in the first pipeline 11, the check valve 16 is located between the vacuum gauge 18 and the first electromagnetic valve 15, and the first stop valve 17 is arranged on a testing end of the vacuum gauge 18, in this example, the vacuum gauge 18 is communicated with the first pipeline 11 through a first thin pipeline 19, and the first stop valve 17 is arranged on the first thin pipeline 19, when the vacuum gauge 18 normally detects the vacuum in the first pipeline 11, the first stop valve 17 is opened, and when the vacuum gauge 18 needs to be replaced, the first stop valve 17 is closed, so that the vacuum degree in the first pipeline 11 does not change.

[0035] The vacuum gauge 18 is signal connected with the PLC controller, in this example, the lowest vacuum degree in the first pipeline 11 is required to be kept at 85KPa-90KPa, if the vacuum degree detected by the vacuum gauge 18 is lower than 85KPa, the vacuum gauge 18 sends a signal to the PLC controller, and the PLC controller starts a standby device to assist in vacuumizing.

[0036] The water ring vacuum assembly 1 further comprises a first pressure gauge 151 and a second pressure gauge 152, both of which are arranged on the first pipeline 11, and the first electromagnetic valve 15 is located between the first pressure gauge 151 and the second pressure gauge 152, both of which are signal connected with the PLC controller, and both of which are used for monitoring the pressure in the first pipeline 11, when the pressure difference between the first pressure gauge 151 and the second pressure gauge 152 is not within a set range, the PLC controller can close the first electromagnetic valve 15, in addition, if the pressure value monitored by the first pressure gauge 151 or the second pressure gauge 152 is not within a set range, the first pressure gauge 151 or the second pressure gauge 152 also sends a signal to the PLC controller, and the PLC controller closes the first electromagnetic valve 15.

[0037] The steam-water separation assembly 2 comprises a steam-water separator 21, a second pipeline 22 and an exhaust pipe 23. The second pipeline 22 is communicated with the water ring vacuum pump 12 and the steam-water separator 21 at two ends respectively. The water ring vacuum pump 12 is used for extracting vacuum. When the water ring vacuum pump 12 extracts vacuum, the temperature of the gas is high. Therefore, the high-temperature gas is cooled in the water ring vacuum pump 12, and then enters the steam-water separator 21 through the second pipeline 22. The cooling is realized by mixing the cooling liquid with the high-temperature gas. The exhaust pipe 23 is arranged on the steam-water separator 21. The gas and the liquid are separated in the steam-water separator 21. The gas is discharged outward from the exhaust pipe 23. The exhaust pipe 23 is arranged on the upper portion of the steam-water separator 21.

[0038] The steam-water separation assembly 2 further comprises a water supplement pipeline 24 and a bypass water pipeline 25. The first end of the water supplement pipeline 24 is used for communicating with a water source. The second end of the water supplement pipeline 24 is communicated with the steam-water separator 21. When the water needs to be supplemented in the steam-water separator 21, the water is supplemented into the steam-water separator 21 through the water supplement pipeline 24.

[0039] The second electromagnetic valve 26 is arranged on the water supplement pipeline 24. The second electromagnetic valve 26 is signal-connected with a PLC controller. The bypass water pipeline 25 is communicated with the water supplement pipeline 24 and the steam-water separator 21 at two ends respectively. The first valve 27 is arranged on the bypass water pipeline 25. The first valve 27 is a manual valve. The second electromagnetic valve 26 is used for starting and stopping the water outlet end of the water supplement pipeline 24. That is, the second electromagnetic valve 26 is only matched with the water supplement of the water supplement pipeline 24. The bypass water pipeline 25 is communicated with the water source through the water supplement pipeline 24. When the second electromagnetic valve 26 is damaged, the second electromagnetic valve 26 has no effect on the on-off of the bypass water pipeline 25. The first valve 27 is opened. The water enters the bypass water pipeline 25 from the water supplement pipeline 24. The water is supplemented into the steam-water separator 21 from the bypass water pipeline 25. The bypass water pipeline 25 is used as a backup.

[0040] The steam-water separation assembly 2 further comprises a pressure reducing valve 28 and a water supplement filter 29. The water supplement filter 29 and the pressure reducing valve 28 are arranged on the water supplement pipeline 24. The pressure reducing valve 28 is used for reducing the pressure of the liquid to prevent the pressure of the liquid from being too large. The water supplement filter 29 is used for filtering the impurities in the liquid. The pressure reducing valve 28 is located between the second electromagnetic valve 26 and the water supplement filter 29. The bypass water pipeline 25 is communicated between the second electromagnetic valve 26 and the pressure reducing valve 28.

[0041] The steam-water separation assembly 2 further comprises a liquid level gauge 20, a high water level alarm 211 and a low water level alarm 212, all of which are arranged on the steam-water separator 21, the high water level alarm 211 is arranged above the low water level alarm 212, and the liquid level gauge 20, the high water level alarm 211 and the low water level alarm 212 are all signal-connected with the PLC controller, the liquid level gauge 20 is used to monitor the height of the liquid in the steam-water separator 21, if the liquid level is higher than the set value, the liquid level gauge 20 sends a signal to the PLC controller, the PLC controller closes the second electromagnetic valve 26, at the same time, the PLC controller opens the high water level alarm 211, the high water level alarm 211 sends an alarm, and the staff checks whether the first valve 27 needs to be closed.

[0042] If the liquid level is lower than the set value, the liquid level gauge 20 sends a signal to the PLC controller, the PLC controller opens the second electromagnetic valve 26, at the same time, the PLC controller opens the low water level alarm 212, the low water level alarm 212 sends an alarm, and the staff checks whether the first valve 27 needs to be opened.

[0043] The water ring vacuum pump 12 is provided with a first drain pipe 121 at the bottom, the steam-water separator 21 is provided with a second drain pipe 221 at the bottom, and a connecting pipe 39 is arranged between the water ring vacuum pump 12 and the steam-water separator 21, the two ends of the connecting pipe 39 are communicated with the water ring vacuum pump 12 and the steam-water separator 21 respectively, the second valve 40 is arranged on the connecting pipe 39, the third valve 123 is arranged on the first drain pipe 121, and the fourth valve 222 is arranged on the second drain pipe 221, when the liquid accumulated in the water ring vacuum pump 12 is too much, the second valve 40 can be opened, the liquid enters the steam-water separator 21 from the connecting pipe 39, and the first drain pipe 121 and the second drain pipe 221 are jointly communicated with the total drain pipe 4, when the water ring vacuum pump 12 and the steam-water separator 21 need to be cleaned, the third valve 123 and the fourth valve 222 are opened, and the waste water is discharged from the total drain pipe 4.

[0044] The heat exchange assembly 3 comprises an inlet pipe 31, an outlet pipe 32 and a heat exchanger 33, the two ends of the inlet pipe 31 are communicated with the steam-water separator 21 and the heat exchanger 33 respectively, the two ends of the outlet pipe 32 are communicated with the outlet pipe 32 and the water ring vacuum pump 12 respectively, the steam-water separator 21 separates out high-temperature liquid, the heat exchanger 33 is simultaneously communicated with the inlet pipe 31 and the outlet pipe 32, and the water ring vacuum pump 12, when adsorbing vacuum, also simultaneously passes through the outlet pipe 32, the heat exchanger 33 and the inlet pipe 31 to adsorb the separated liquid in the steam-water separator 21, the separated liquid is cooled through the heat exchanger 33, and the cooled liquid returns to the water ring vacuum pump 12 to absorb the heat in the water ring vacuum pump 12, and simultaneously absorbs the heat of the gas in the water ring vacuum pump 12, so that the temperature of the gas is reduced.

[0045] The heat exchange assembly 3 further comprises a second stop valve 34 and a pressure gauge 35, the pressure gauge 35 is arranged on the liquid outlet pipe 32, the second stop valve 34 is communicated with the pressure gauge 35 and the liquid outlet pipe 32, the second stop valve 34 is arranged between the pressure gauge 35 and the liquid outlet pipe 32, in this case, the pressure gauge 35 is communicated with the liquid outlet pipe 32 through a second thin pipe 38, the second stop valve 34 is arranged on the second thin pipe 38, the pressure gauge 35 is used to monitor the pressure of the cooling water, because the temperature of the liquid is lowered after the heat exchange of the heat exchanger 33, the pressure of the liquid in the liquid outlet pipe 32 is also lowered, if the pressure value monitored by the pressure gauge 35 is greater than the set range, then the pressure gauge 35 sends a signal to the PLC controller, the PLC controller closes the first electromagnetic valve 15, at this time, no high-temperature gas enters the water ring vacuum pump 12, only the liquid is circulated alone, until the pressure value monitored by the pressure gauge 35 reaches the normal value, and the corresponding check is also made by the operator.

[0046] The heat exchange assembly 3 further comprises a spray pipe 36 and a nozzle 37, the spray pipe 36 is communicated with the liquid outlet pipe 32 and the first pipeline 11 respectively at two ends, the nozzle 37 is arranged on the spray pipe 36, part of the cooling liquid flowing out of the liquid outlet pipe 32 enters the spray pipe 36, and the atomized steam is sprayed out through the nozzle 37, and the atomized steam enters the first pipeline 11 and mixes with the gas, and the steam has a cooling effect on the gas in the first pipeline 11.

[0047] The heat exchange assembly 3 further comprises a first temperature gauge 311 and a second temperature gauge 312, the first temperature gauge 311 and the second temperature gauge 312 are signal connected with the PLC controller, the first temperature gauge 311 is arranged on the liquid inlet pipe 31, and the second temperature gauge 312 is arranged on the liquid outlet pipe 32, the first temperature gauge 311 is used to monitor the temperature of the liquid in the liquid inlet pipe 31, and the second temperature gauge 312 is used to monitor the temperature of the liquid in the liquid outlet pipe 32, if the temperature value monitored by the first temperature gauge 311 or the second temperature gauge 312 is not within the set range, then the first temperature gauge 311 or the second temperature gauge 312 sends a signal to the PLC controller, the PLC controller issues an alarm to remind the operator to check.

[0048] If the temperature difference between the first temperature gauge 311 and the second temperature gauge 312 is also not within the set range, then the first temperature gauge 311 and the second temperature gauge 312 send a signal to the PLC controller, and the PLC controller issues an alarm to remind the operator to check.

[0049] The heat exchanger 33 is communicated with a cooling water inlet pipe 331 and a cooling water outlet pipe 332, the cooling water inlet pipe 331 and the cooling water outlet pipe 332 are communicated with the heat exchanger 33, the cooling liquid flowing out of the cooling water inlet pipe 331 enters the heat exchanger 33, and then the cooling liquid is cooled and flows out of the cooling water outlet pipe 332.

[0050] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A vacuum system for condenser of power plant, comprising a water ring vacuum assembly (1), a steam-water separation assembly (2) and a heat exchange assembly (3), characterized in that, the water ring vacuum assembly (1) comprises a first pipeline (11), a water ring vacuum pump (12) and a motor (13), the water ring vacuum pump (12) is connected to the driving end of the motor (13), the first end of the first pipeline (11) is used for connecting the condenser, and the second end of the first pipeline (11) is communicated with the water ring vacuum pump (12); the steam-water separation assembly (2) comprises a steam-water separator (21), a second pipeline (22) and an exhaust pipe (23), the two ends of the second pipeline (22) are communicated with the water ring vacuum pump (12) and the steam-water separator (21) respectively, and the exhaust pipe (23) is arranged on the steam-water separator (21); the heat exchange assembly (3) comprises an inlet pipe (31), an outlet pipe (32) and a heat exchanger (33), the two ends of the inlet pipe (31) are communicated with the steam-water separator (21) and the heat exchanger (33) respectively, and the two ends of the outlet pipe (32) are communicated with the outlet pipe (32) and the water ring vacuum pump (12) respectively.

2. A vacuum system for a power plant condenser according to claim 1, characterised in that, the water ring vacuum assembly (1) further comprises an inlet filter screen (14) and a first electromagnetic valve (15), the inlet filter screen (14) and the first electromagnetic valve (15) are arranged on the first pipeline (11), and the first electromagnetic valve (15) is arranged between the inlet filter screen (14) and the water ring vacuum pump (12).

3. A vacuum system for a power plant condenser according to claim 2, characterised in that, the water ring vacuum assembly (1) further comprises a check valve (16), a first stop valve (17) and a vacuum gauge (18), the check valve (16) and the vacuum gauge (18) are arranged on the first pipeline (11), the check valve (16) is located between the vacuum gauge (18) and the first electromagnetic valve (15), and the first stop valve (17) is arranged on the testing end of the vacuum gauge (18).

4. A vacuum system for a power plant condenser according to claim 2, characterised in that, the water ring vacuum assembly (1) further comprises a first pressure device (151) and a second pressure device (152), the first pressure device (151) and the second pressure device (152) are arranged on the first pipeline (11), and the first electromagnetic valve (15) is located between the first pressure device (151) and the second pressure device (152).

5. A vacuum system for a power plant condenser according to claim 1, characterized in that, the steam-water separation assembly (2) further comprises a water supplement pipe (24) and a bypass water pipe (25), the first end of the water supplement pipe (24) is used for connecting a water source, the second end of the water supplement pipe (24) is communicated with the steam-water separator (21), a second electromagnetic valve (26) is arranged on the water supplement pipe (24), the two ends of the bypass water pipe (25) are communicated with the water supplement pipe (24) and the steam-water separator (21) respectively, a first valve (27) is arranged on the bypass water pipe (25), the second electromagnetic valve (26) is used for starting and stopping the water outlet end of the water supplement pipe (24), and the bypass water pipe (25) is communicated with the water source through the water supplement pipe (24).

6. A vacuum system for a power plant condenser according to claim 5, characterised in that, The steam-water separation assembly (2) further comprises a pressure reducing valve (28) and a make-up water filter (29), the make-up water filter (29) and the pressure reducing valve (28) are arranged on the make-up water pipe (24), the pressure reducing valve (28) is located between the second electromagnetic valve (26) and the make-up water filter (29), and the bypass water pipe (25) is communicated between the second electromagnetic valve (26) and the pressure reducing valve (28).

7. A vacuum system for a power plant condenser according to claim 5, characterised in that, The steam-water separation assembly (2) further comprises a liquid level meter (20), a high water level alarm (211) and a low water level alarm (212), the liquid level meter (20), the high water level alarm (211) and the low water level alarm (212) are arranged on the steam-water separator (21), and the high water level alarm (211) is arranged above the low water level alarm (212).

8. A vacuum system for power plant condensers according to claim 1, characterized in that, The heat exchange assembly (3) further comprises a second stop valve (34) and a pressure gauge (35), the second stop valve (34) is arranged between the pressure gauge (35) and the liquid outlet pipe (32), and the second stop valve (34) simultaneously communicates the pressure gauge (35) and the liquid outlet pipe (32).

9. A vacuum system for power plant condensers according to claim 1, characterized in that, The heat exchange assembly (3) further comprises a spray pipe (36) and a nozzle (37), both ends of the spray pipe (36) are respectively communicated with the liquid outlet pipe (32) and the first pipeline (11), and the nozzle (37) is arranged on the spray pipe (36).

10. A vacuum system for power plant condensers according to claim 1, characterized in that, The heat exchange assembly (3) further comprises a first temperature gauge (311) and a second temperature gauge (312), the first temperature gauge (311) is arranged on the liquid inlet pipe (31), and the second temperature gauge (312) is arranged on the liquid outlet pipe (32).

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