Vacuum pumping device of condenser

Abstract

The utility model relates to the technical field of condensers, and provides a condenser vacuumizing device which comprises a condenser body and a water storage tank, a cooling medium inlet pipe and a cooling medium outlet pipe are arranged on the condenser body, a heat exchange pipe is arranged in the condenser body, and the two ends of the heat exchange pipe are connected with the cooling medium inlet pipe and the cooling medium outlet pipe correspondingly. The cooling medium outlet pipe is connected with a first circulating pump, the first circulating pump is connected with a water storage tank through a pipeline, desalted water is arranged in the water storage tank, a vacuum gauge is arranged in the condenser body, an exhaust pipe is arranged on the condenser body, a first control valve is arranged on the exhaust pipe, and the exhaust pipe is connected with a first branch pipe and a second branch pipe. A first roots pump, a first vacuumizing pump and a second control valve are arranged on the first branch pipe. The desalted water is used as a cooling medium, the water quality of the desalted water is good, internal scaling of the cooling medium inlet pipe, the cooling medium outlet pipe and the heat exchange pipe is avoided, and the maintenance frequency of the pipeline is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of condensers, and in particular to a condenser vacuum pumping device. Background Art

[0002] The condenser is one of the important links in the operation of thermal power generation. The function of the condenser is to use the cooling medium to recycle the heat of the water vapor discharged from the turbine, and at the same time quickly condense the water vapor into water for reuse in the boiler. The volume of the water vapor is greatly reduced in the process of cooling to form water in the condenser, so that a high vacuum environment is formed in the condenser. As the steam condenses, it will continuously release non-condensable gases, and the outside world will continuously leak air into the vacuum system, causing the vacuum degree inside the condenser to decrease. If the non-condensable gases are not extracted in time, the pressure inside the equipment will increase, which will have a great impact on the safety and efficiency of the steam turbine.

[0003] When the condenser is running, scaling is likely to occur inside the heat exchange tubes, which reduces the amount of cooling water and the heat exchange effect. At the same time, it will cause the exhaust volume to increase and the suction volume to decrease, affecting the stability of the unit and increasing energy consumption. It is necessary to frequently maintain the heat exchange tubes, which is inconvenient. Summary of the invention

[0004] The purpose of the embodiment of the present application is to provide a condenser vacuum pumping device, which uses desalted water as a cooling medium to avoid scaling inside the heat exchange tubes, extend the service life of the heat exchange tubes, and reduce the maintenance frequency of the heat exchange tubes.

[0005] The embodiment of the present application provides a condenser vacuum pumping device, which adopts the following technical solutions:

[0006] A condenser vacuum pumping device comprises a condenser body and a water storage tank, wherein the condenser body is provided with a cooling medium inlet pipe and a cooling medium outlet pipe, a heat exchange pipe is provided inside the condenser body, two ends of the heat exchange pipe are respectively connected to the cooling medium inlet pipe and the cooling medium outlet pipe, the cooling medium outlet pipe is connected to a first circulation pump, the first circulation pump is connected to the water storage tank through a pipeline, and desalted water is provided inside the water storage tank;

[0007] A vacuum gauge is arranged inside the condenser body, an exhaust pipe is arranged on the condenser body, a first control valve is arranged on the exhaust pipe, the exhaust pipe is connected with a first branch pipe and a second branch pipe, a first Roots pump, a first vacuum pump and a second control valve are arranged on the first branch pipe, and a second Roots pump, a second vacuum pump and a third control valve are arranged on the second branch pipe.

[0008] Preferably, a temperature sensor is provided on the cooling medium outlet pipe, and a heat exchanger is provided between the first circulation pump and the water storage tank.

[0009] Preferably, a first bypass filter is provided between the heat exchanger and the first circulation pump.

[0010] Preferably, a flow regulating valve is provided on the cooling medium inlet pipe.

[0011] Preferably, the condenser body is connected to a boost pipe, the boost pipe is connected to a boost pump, and a fourth control valve is provided on the boost pipe.

[0012] Preferably, a condensate water tank is provided at the bottom of the condenser body, the condensate water tank is connected to a recovery pipe, and the recovery pipe is connected to a second circulation pump.

[0013] Preferably, the second circulation pump is connected to a second bypass filter.

[0014] Preferably, a water pressure sensor is provided on the recovery pipe.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] The present application uses desalted water as the cooling medium. The water quality of the desalted water is good, which avoids internal scaling of the cooling medium inlet pipe, the cooling medium outlet pipe and the heat exchange tube, prolongs the service life of the heat exchange tube, reduces the cleaning frequency of the cooling medium inlet pipe, the cooling medium outlet pipe and the heat exchange tube, and forms a closed loop among the water storage tank, the cooling medium inlet pipe, the heat exchange tube, the cooling medium outlet pipe and the first circulation pump, thereby realizing the reuse of the desalted water and reducing the loss.

[0017] By setting the first branch and the second branch in parallel, the first branch or the second branch can be used as a backup. When the vacuum pump on one of the branches is under maintenance, the vacuum pump on the other branch can be switched to work by controlling the opening and closing of the second control valve and the third control valve, thereby shortening the frequency of shutdowns for maintenance and ensuring the stable operation of the condenser body. When the condenser body is working, the vacuum degree inside the condenser body can be detected by a vacuum gauge, and according to the vacuum degree inside the condenser body, when the exhaust capacity of the first vacuum pump or the second vacuum pump can maintain the vacuum degree inside the condenser body, the first vacuum pump or the second vacuum pump can work alone. When the exhaust capacity of the first vacuum pump or the second vacuum pump is insufficient, the first Roots pump or the second Roots pump is started to increase the pressure of the medium flowing into the first vacuum pump or the second vacuum pump, thereby improving the exhaust capacity and maintaining the vacuum degree inside the condenser body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structures of some embodiments of the present application.

[0020] The reference numerals are:

[0021] 1. Condenser body; 2. Water storage tank; 3. Cooling medium inlet pipe; 4. Cooling medium outlet pipe; 5. Heat exchange pipe; 6. First circulation pump; 7. Vacuum gauge; 8. Exhaust pipe; 9. First control valve; 10. First branch pipe; 11. Second branch pipe; 12. First Roots pump; 13. First vacuum pump; 14. Second control valve; 15. Second Roots pump; 16. Second vacuum pump; 17. Third control valve; 18. Temperature sensor; 19. Heat exchanger; 20. First bypass filter; 21. Flow regulating valve; 22. Booster pipe; 23. Booster pump; 24. Fourth control valve; 25. Boiler; 26. Condensate tank; 27. Recovery pipe; 28. Second circulation pump; 29. ​​Second bypass filter; 30. Water pressure sensor. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] Example

[0029] like Figure 1 As shown, the condenser vacuum pumping device described in the embodiment of the present application includes a condenser body 1 and a water tank 2, a cooling medium inlet pipe 3 and a cooling medium outlet pipe 4 are arranged on the condenser body 1, a heat exchange pipe 5 is arranged inside the condenser body 1, both ends of the heat exchange pipe 5 are respectively connected to the cooling medium inlet pipe 3 and the cooling medium outlet pipe 4, the cooling medium outlet pipe 4 is connected to a first circulation pump 6, the first circulation pump 6 is connected to the water tank 2 through a pipeline, and desalted water is arranged inside the water tank 2, and desalted water is used as the cooling medium. The water quality of the desalted water is good, and the internal scaling of the cooling medium inlet pipe 3, the cooling medium outlet pipe 4 and the heat exchange pipe 5 is avoided, and the cleaning frequency of the cooling medium inlet pipe 3, the cooling medium outlet pipe 4 and the heat exchange pipe 5 is reduced. A closed loop is formed among the water tank 2, the cooling medium inlet pipe 3, the heat exchange pipe 5, the cooling medium outlet pipe 4 and the first circulation pump 6, so as to realize the reuse of desalted water and reduce loss.

[0030] A vacuum gauge 7 is provided inside the condenser body 1, an exhaust pipe 8 is provided on the condenser body 1, a first control valve 9 is provided on the exhaust pipe 8, the exhaust pipe 8 is connected to a first branch pipe 10 and a second branch pipe 11, a first Roots pump 12, a first vacuum pump 13 and a second control valve 14 are provided on the first branch pipe 10, and a second Roots pump 15, a second vacuum pump 16 and a third control valve 17 are provided on the second branch pipe 11.

[0031] By setting the first branch pipe 10 and the second branch pipe 11 in parallel, the first branch pipe 10 or the second branch pipe 11 can be used as a backup. When the vacuum pump on one branch is under maintenance, the vacuum pump on the other branch can be switched to work by controlling the opening and closing of the second control valve 14 and the third control valve 17, thereby shortening the shutdown frequency for maintenance and ensuring the stable operation of the condenser body 1. When the condenser body 1 is working, the vacuum gauge 7 can be used to detect the vacuum degree inside the condenser body 1, and the vacuum degree inside the condenser body 1 can be determined according to the vacuum degree inside the condenser body 1. When the suction capacity of the first vacuum pump 13 or the second vacuum pump 16 is able to maintain the vacuum degree inside the condenser body 1, the first vacuum pump 13 or the second vacuum pump 16 can work alone; when the suction capacity of the first vacuum pump 13 or the second vacuum pump 16 is insufficient, the first Roots pump 12 or the second Roots pump 15 is started to increase the pressure of the medium flowing into the first vacuum pump 13 or the second vacuum pump 16, thereby improving the suction capacity to maintain the vacuum degree inside the condenser body 1.

[0032] In this embodiment, a temperature sensor 18 is provided on the cooling medium outlet pipe 4, and a heat exchanger 19 is provided between the first circulation pump 6 and the water storage tank 2. The temperature sensor 18 is used to detect the temperature of the desalted water after heat exchange. When the temperature of the desalted water is higher than the set value, the heat exchanger 19 works to cool the desalted water. When the temperature of the desalted water is not higher than the set value, the heat exchanger 19 does not work.

[0033] In this embodiment, a first bypass filter 20 is provided between the heat exchanger 19 and the first circulation pump 6 to filter the desalted water after heat exchange to ensure the water quality of the desalted water.

[0034] In this embodiment, a flow regulating valve 21 is provided on the cooling medium inlet pipe 3 to facilitate adjusting the flow rate of the desalted water according to usage requirements.

[0035] In this embodiment, the condenser body 1 is connected to a boost pipe 22, the boost pipe 22 is connected to a boost pump 23, and a fourth control valve 24 is provided on the boost pipe 22. When the vacuum degree inside the condenser body 1 is lower than the set value, the boost pump 23 is started, the fourth control valve 24 is opened, and air is filled into the condenser body 1 to maintain the vacuum degree inside the condenser body 1 stable. If the vacuum degree inside the condenser body 1 still does not meet the standard after the boost pump 23 has filled the condenser body 1 with air for a period of time, the operator is reminded to perform on-site maintenance.

[0036] In this embodiment, a condensate tank 26 is provided at the bottom of the condenser body 1, and the condensate tank 26 is connected to a recovery pipe 27, and the recovery pipe 27 is connected to a second circulation pump 28. The condensate inside the condensate tank 26 is pumped to the boiler 25 through the second circulation pump 28 for recycling, thereby reducing the loss of water resources.

[0037] In this embodiment, the second circulation pump 28 is connected to a second side filter 29 for filtering the recovered condensed water to reduce the ion content in the condensed water.

[0038] In this embodiment, a water pressure sensor 30 is provided on the recovery pipe 27 to detect the water pressure inside the recovery pipe 27. When the recovery pipe 27 is blocked, the water pressure will change, thereby facilitating the operator to shut down the equipment in time and maintain the recovery pipe 27.

[0039] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A condenser vacuum pumping device, characterized in that: It comprises a condenser body and a water storage tank, wherein the condenser body is provided with a cooling medium inlet pipe and a cooling medium outlet pipe, a heat exchange pipe is provided inside the condenser body, two ends of the heat exchange pipe are respectively connected to the cooling medium inlet pipe and the cooling medium outlet pipe, the cooling medium outlet pipe is connected to a first circulation pump, the first circulation pump is connected to the water storage tank through a pipeline, and desalted water is provided inside the water storage tank; A vacuum gauge is arranged inside the condenser body, an exhaust pipe is arranged on the condenser body, a first control valve is arranged on the exhaust pipe, the exhaust pipe is connected with a first branch pipe and a second branch pipe, a first Roots pump, a first vacuum pump and a second control valve are arranged on the first branch pipe, and a second Roots pump, a second vacuum pump and a third control valve are arranged on the second branch pipe.

2. A condenser vacuum pumping device according to claim 1, characterized in that: A temperature sensor is arranged on the cooling medium outlet pipe, and a heat exchanger is arranged between the first circulation pump and the water storage tank.

3. A condenser vacuum pumping device according to claim 2, characterized in that: A first bypass filter is arranged between the heat exchanger and the first circulation pump.

4. A condenser vacuum pumping device according to claim 3, characterized in that: The cooling medium inlet pipe is provided with a flow regulating valve.

5. The condenser vacuum pumping device according to claim 1, characterized in that: The condenser body is connected with a boost pipe, the boost pipe is connected with a boost pump, and a fourth control valve is arranged on the boost pipe.

6. A condenser vacuum pumping device according to claim 1, characterized in that: A condensate water tank is provided at the bottom of the condenser body, the condensate water tank is connected to a recovery pipe, and the recovery pipe is connected to a second circulation pump.

7. A condenser vacuum pumping device according to claim 6, characterized in that: The second circulation pump is connected to a second bypass filter.

8. A condenser vacuum pumping device according to claim 7, characterized in that: The recovery pipe is provided with a water pressure sensor.

Images