Liquid ring vacuum pump unit with front condenser

Abstract

The utility model discloses a liquid ring vacuum pump unit with a preposed condenser, which comprises a base, the base is provided with the condenser, the condenser is provided with an air inlet, the air inlet is communicated with an air inlet pipeline, the tail end of the air inlet pipeline is communicated with a liquid ring vacuum pump on the base, and the preposed condenser is arranged on the liquid ring vacuum pump. The liquid ring vacuum pump is communicated with a gas-liquid separation tank on the base through an exhaust pipe, an exhaust port is formed in the gas-liquid separation tank, and a liquid management assembly matched with the gas-liquid separation tank is further arranged on the base. The condenser liquid ring vacuum pump unit has the advantages that the technical problems that in the prior art, a power plant condenser liquid ring vacuum pump unit is not provided with a corresponding condenser, so that the temperature of gas cannot be reduced, and the performance, the operation efficiency and the ultimate vacuum of the power plant condenser liquid ring vacuum pump unit are reduced are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power generation equipment, in particular to a liquid ring vacuum pump unit with a pre-condenser. Background Art

[0002] The water ring vacuum pump is a positive displacement vacuum pump. The impeller is eccentrically installed in the pump body. When the pump is started, a certain height of water is injected into the pump. Therefore, when the impeller rotates, the water is subjected to the centrifugal force and forms a rotating water ring on the inner wall of the pump body. The inner surface of the upper part of the water ring is tangential to the hub and rotates along the bending direction of the blades. In the first half of the rotation, the inner surface of the water ring gradually separates from the hub, thus forming a closed space between the impeller blades and the water ring.

[0003] In power plants, power plant condenser liquid ring vacuum pump units are often used in the vacuum pumping and vacuum maintenance processes of the condenser; by effectively eliminating gas leakage inside the condenser, providing lower back pressure, improving thermal efficiency and reducing power generation costs; however, the temperature of the gas discharged from the condenser often exceeds 70°C, which will cause the water temperature of the power plant condenser liquid ring vacuum pump unit to be too high and the vacuum degree to decrease, which not only wastes resources but also shortens the life of the equipment. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned technical deficiencies and provide a liquid ring vacuum pump unit with a pre-condenser to solve the technical problem that the power plant condenser liquid ring vacuum pump unit in the prior art is not provided with a corresponding condenser, resulting in the inability to cool the gas temperature, thereby reducing the performance, operating efficiency and ultimate vacuum of the power plant condenser liquid ring vacuum pump unit.

[0005] In order to achieve the above technical purpose, the present invention adopts the following technical solutions:

[0006] In a first aspect, the utility model provides a liquid ring vacuum pump unit with a pre-condenser, comprising:

[0007] A base is provided with a condenser, and an air inlet is provided on the condenser, an air inlet pipe is connected to the air inlet, an end of the air inlet pipe is connected to the liquid ring vacuum pump on the base, the liquid ring vacuum pump is connected to the gas-liquid separation tank on the base through an exhaust pipe, and the gas-liquid separation tank is provided with an exhaust port, and a liquid management component cooperating with the gas-liquid separation tank is also provided on the base.

[0008] In some embodiments, the condenser is disposed on a support frame, and the support frame is arranged on the base.

[0009] In some embodiments, the liquid ring vacuum pump includes a first pump body and a second pump body, the first pump body and the second pump body are symmetrically installed on the base, and the liquid storage capacity of the first pump body is smaller than the liquid storage capacity of the second pump body, the condenser and the first pump body and the second pump body are connected through the air intake pipe; the outside of the first pump body and the second pump body are respectively connected to the first motor and the second motor through a coupling.

[0010] In some embodiments, the air intake pipe includes a first pipe, a second pipe, a third pipe and a fourth pipe; the first pipe is connected to the condenser, and the first pipe is connected to the second pipe, the second pipe is connected to the first pump body through the third pipe, and the second pipe is connected to the second pump body through the fourth pipe.

[0011] In some embodiments, valves are provided on both the third pipeline and the fourth pipeline.

[0012] In some embodiments, the exhaust pipe includes a first exhaust pipe and a second air guide pipe, the first exhaust pipe is used to connect the first pump body with the gas-liquid separation tank, and the second air guide pipe is used to connect the second pump body with the gas-liquid separation tank.

[0013] In some embodiments, the liquid management component includes a liquid replenishing component; the liquid replenishing component is used to replenish liquid in the gas-liquid separation tank.

[0014] In some embodiments, the liquid management component includes a liquid supply component, and the liquid supply component is used to connect the gas-liquid separation tank with the heat exchange component.

[0015] In some embodiments, the heat exchange assembly includes a first heat exchanger and a second heat exchanger; the first heat exchanger is connected to a first pump body, and the second heat exchanger is connected to the second pump body.

[0016] In some embodiments, the liquid management assembly further includes a drain assembly, which is used to drain excess liquid from the first pump body and the second pump body.

[0017] Compared with the prior art, the utility model provides a liquid ring vacuum pump unit with a pre-condenser. This device can improve the power generation efficiency during the use of the power plant by setting the condenser. The power plant condenser liquid ring vacuum pump unit can reduce the exhaust back pressure of the turbine, thereby reducing the heat consumption of the turbine, improving the power generation efficiency, and then reducing the power supply coal consumption, achieving the effect of energy conservation and emission reduction. In the power plant, the power plant condenser liquid ring vacuum pump unit is often used in the vacuum and vacuum maintenance process of the condenser. By effectively eliminating the air leakage inside the condenser, it provides a lower back pressure, improves the thermal efficiency and reduces the power generation cost. At the same time, in the desulfurization system of the power plant, the water ring vacuum pump is used to treat the gas in the desulfurization process to ensure the system The normal operation of the system has been widely used in the energy-saving transformation of power plants. By transforming the vacuum pump system, energy consumption can be significantly reduced and the reliability of equipment operation can be improved. Traditional water ring vacuum pumps are prone to cavitation during high load periods, which affects their service life. By adding measures such as atmospheric ejectors, the impact of cavitation on the vacuum pump rotor can be effectively avoided, and the service life of the equipment can be extended. By optimizing the design of the working fluid cooling system, the suction capacity of the vacuum pump can be improved, the shaft power can be reduced, and the safety and stability of operation can be improved. The application of power plant condenser liquid ring vacuum pump units in power plants not only improves power generation efficiency and economic benefits, but also improves the operational reliability and life of the equipment through energy-saving transformation and system optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of a liquid ring vacuum pump unit for a power plant condenser provided by an embodiment of the present utility model;

[0019] Figure 2 It is a top view of a power plant condenser liquid ring vacuum pump unit provided by an embodiment of the utility model.

[0020] Explanation of the accompanying drawings: 1. Base; 2. Condenser; 21. Air inlet; 22. Support frame; 3. Air inlet pipe; 31. First pipe; 32. Second pipe; 33. Third pipe; 34. Fourth pipe; 4. Liquid ring vacuum pump; 41. First pump body; 42. Second pump body; 5. Exhaust pipe; 51. First air duct; 52. Second air duct; 6. Gas-liquid separation tank; 61. Exhaust port; 7. Liquid replenishment assembly; 8. Liquid supply assembly; 9. Liquid drainage assembly; 10. Heat exchange assembly; 101. First heat exchanger; 102. Second heat exchanger. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] In order to solve the technical problem that the power plant condenser liquid ring vacuum pump unit in the prior art is not provided with a corresponding condenser, resulting in the inability to cool the gas temperature, thereby reducing the performance, operating efficiency and ultimate vacuum of the power plant condenser liquid ring vacuum pump unit, the utility model provides a liquid ring vacuum pump unit with a pre-condenser, which can save equipment operating costs, reduce energy consumption, and extend the service life of the equipment.

[0023] It should be noted that the power plant condenser liquid ring vacuum pump unit described in the present invention is used for but not limited to the power plant field, etc. For the convenience of explanation, in the present invention, only the power plant condenser liquid ring vacuum pump unit applied to the power plant field is used as an example for explanation, and the principles of the power plant condenser liquid ring vacuum pump unit applied to other types of equipment are essentially the same as those applied to the power plant field, and will not be repeated here.

[0024] See also Figure 1 , Figure 1 This is a structural schematic diagram of a liquid ring vacuum pump unit with a pre-condenser in one embodiment of the utility model. The liquid ring vacuum pump unit with a pre-condenser includes a base 1, a condenser 2 is provided on the base 1, and an air inlet 21 is provided on the condenser 2, an air inlet pipe 3 is connected to the air inlet 21, and the end of the air inlet pipe 3 is connected to the liquid ring vacuum pump 4 on the base 1, the liquid ring vacuum pump 4 is connected to the gas-liquid separation tank 6 on the base 1 through an exhaust pipe 5, and the gas-liquid separation tank 6 is provided with an exhaust port 61, and a liquid management component cooperating with the gas-liquid separation tank 6 is also provided on the base 1.

[0025] In this embodiment, the device is provided with a condenser 2 so that the power generation efficiency can be improved during its use in the power plant. The power plant condenser liquid ring vacuum pump unit can reduce the exhaust back pressure of the turbine, thereby reducing the heat consumption of the turbine, improving the power generation efficiency, and further reducing the power supply coal consumption, thereby achieving the effect of energy conservation and emission reduction. In the power plant, the power plant condenser liquid ring vacuum pump unit is often used in the vacuum pumping and vacuum maintenance process of the condenser 2. By effectively eliminating air leakage inside the condenser 2, providing lower back pressure, improving thermal efficiency and reducing power generation costs, at the same time, in the power plant desulfurization system, the water ring vacuum pump is used to treat the gas in the desulfurization process to ensure the normal operation of the system, and has been widely used in the energy-saving transformation of power plants. By transforming the vacuum pump system, energy consumption can be significantly reduced and the reliability of equipment operation can be improved. Traditional water ring vacuum pumps are prone to cavitation during high load periods, which affects their service life. By adding measures such as atmospheric ejectors, the impact of cavitation on the vacuum pump rotor can be effectively avoided, and the service life of the equipment can be extended. By optimizing the design of the working fluid cooling system, the suction capacity of the vacuum pump can be improved, the shaft power can be reduced, and the safety and stability of operation can be improved. The application of power plant condenser liquid ring vacuum pump units in power plants not only improves power generation efficiency and economic benefits, but also improves the operating reliability and life of the equipment through energy-saving transformation and system optimization.

[0026] In one embodiment, see Figure 2 In order to improve the stability of the condenser 2 , the condenser 2 is set on a support frame 22 , and the support frame 22 is arranged on the base 1 .

[0027] In this embodiment, a support frame 22 is provided on the condenser 2 for supporting the entire condenser 2 so as to make it more stable during operation.

[0028] In one embodiment, see Figure 1 - Figure 2 In order to improve the working efficiency of the liquid ring vacuum pump 4, the liquid ring vacuum pump 4 includes a first pump body 41 and a second pump body 42. The first pump body 41 and the second pump body 42 are symmetrically installed on the base 1, and the liquid storage capacity of the first pump body 41 is smaller than the liquid storage capacity of the second pump body 42. The condenser 2 and the first pump body 41 and the second pump body 42 are connected through the intake pipe 3; the outsides of the first pump body 41 and the second pump body 42 are respectively connected to the first motor and the second motor through a coupling; the intake pipe 3 includes a first pipe 31, a second pipe 32, a third pipe 33 and a fourth pipe 34; the first pipe 31 is connected to the condenser 2, and the first pipe 31 is connected to the second pipe 32, the second pipe 32 is connected to the first pump body 41 through the third pipe 33, and the second pipe 32 is connected to the second pump body 42 through the fourth pipe 34. Valves are provided on the third pipe 33 and the fourth pipe 34.

[0029] In this embodiment, the first pump body 41 is a liquid ring pump body with a capacity of 25%, and the second pump body 42 is a liquid ring pump body with a capacity of 50%. The liquid ring vacuum pump 4 is a rotary variable displacement vacuum pump that forms a variable volume by throwing liquid to the pump casing through the rotation of the impeller. The liquid ring and the rotor blades form a variable volume. The advantages of the liquid ring vacuum pump 4 include simple structure, low manufacturing precision requirements, easy processing, compact structure, large exhaust volume, small footprint, isothermal compressed gas, no lubrication required, low wear, uniform suction, stable and reliable operation, simple operation, and easy maintenance. The first pump body 41 and The second pump body 42 is used for the two processes of vacuuming and maintaining the condenser 2 in the power generation system, and the condenser 2 is connected to the first pump body 41 and the second pump body 42 through the first pipe 31, the second pipe 32, the third pipe 33 and the fourth pipe 34. Valves are set on the third pipe 33 and the fourth pipe 34. The valves can be used to control whether the first pump body 41 or the second pump body 42 starts to run. During actual use, the second pump body 42 is closed by the valve to start the first pump body 41, which can save electricity and achieve the effect of saving costs.

[0030] In one embodiment, see Figure 1 - Figure 2 In order to improve the working efficiency of the liquid management component, the exhaust pipe 5 includes a first air duct 51 and a second air duct 52. The first air duct 51 is used to connect the first pump body 41 with the gas-liquid separation tank 6, and the second air duct 52 is used to connect the second pump body 42 with the gas-liquid separation tank 6. The liquid management component includes a liquid replenishing component 7; the liquid replenishing component 7 is used to replenish liquid to the gas-liquid separation tank 6. The liquid management component includes a liquid supply component 8, and the liquid supply component 8 is used to connect the gas-liquid separation tank 6 with the heat exchange component 10. The heat exchange component 10 includes a first heat exchanger 101 and a second heat exchanger 102; the first heat exchanger 101 is connected to the first pump body 41, and the second heat exchanger 102 is connected to the second pump body 42. The liquid management component also includes a drain component 9, which is used to remove excess liquid inside the first pump body 41 and the second pump body 42.

[0031] In the embodiment, the first gas guide pipe 51 and the second gas guide pipe 52 are used for connecting the first pump body 41 and the second pump body 42 with the gas-liquid separation tank 6, and the liquid supplement assembly 7 is used for supplementing the liquid in the gas-liquid separation tank 6 during the gas-liquid separation process. The liquid supplement assembly 7 in the application can realize the functions of automatic liquid supplement and low-position automatic liquid supplement. After the liquid in the gas-liquid separation tank 6 is used up, all the liquid can be emptied by one-key cleaning. The design can ensure that the liquid supplement can be automatically performed during the gas-liquid separation process without manual intervention, thereby improving the work efficiency and safety. In addition, the liquid supplement assembly 7 is also provided with the functions of liquid level display and upper and lower limit automatic sensing, so as to ensure that the liquid level is within the safe range and the liquid supplement operation can be automatically performed. The liquid supply assembly 8 is used for cooperating with the heat exchange assembly 10. The heat exchange assembly 10 includes the first heat exchanger 101 and the second heat exchanger 102, which are used for cooperating with the first pump body 41 and the second pump body 42 respectively. The first heat exchanger 101 and the second heat exchanger 102 are used for cooling the liquid, so that the liquid can enter the first pump body 41 and the second pump body 42 as working medium. The first heat exchanger 101 and the second heat exchanger 102 are composed of a partition plate, a fin, a sealing strip and a flow guide piece. The fin, the flow guide piece and the sealing strip are arranged between two adjacent partition plates to form a sandwich, which is called a channel. The sandwich is stacked according to different ways of fluid and is brazed into a whole to form a plate bundle. The plate bundle is the core of the plate-fin heat exchanger. With necessary heads, pipes and supports, the plate-fin heat exchange assembly 10 is formed. The heat exchange assembly 10 can realize efficient heat transfer while keeping two kinds of gases isolated from each other due to its unique internal structure and efficient heat exchange mechanism. The design not only avoids the mixing or pollution between the gases, but also ensures the full utilization of heat energy. The liquid discharge assembly 9 is a U-shaped pipe body used for discharging the liquid in the gas-liquid separation tank 6.

[0032] In order to better understand the present application, the following will be combined with Figures 1 to 2The technical solution of the present invention is described in detail: the gas enters the condenser 2 from the air inlet 21 and enters the second pipe 32 through the first pipe 31, wherein the staff can choose whether the gas enters the first pump body 41 through the third pipe 33 or the second pump body 42 through the fourth pipe. Since valves are provided on the third pipe 33 and the fourth pipe 34, the gas flow in the third pipe 33 or the fourth pipe 34 can be controlled. The gas passing through the first pump body 41 and the second pump body 42 enters the gas-liquid separation tank 6 through the first air guide pipe 51 or the second air guide pipe 52. During use in the power plant, the second pump body 42 is generally started, that is, the capacity is 50% of the pump body is used to extract the condensed gas inside the power plant. When it is in the ultimate vacuum state, the first pump body 41 is opened, that is, the pump body with a capacity of 25%. At this time, the second pump body 42 is in the closed state, and the first pump body 41 is used to maintain the operation of the equipment, thereby saving electricity costs. The liquid replenishing component 7 is used to replenish the liquid inside the gas-liquid separation tank 6 during the gas-liquid separation process. The liquid replenishing component 7 in this application can realize the functions of automatic liquid addition and low-level automatic liquid replenishment. After the liquid inside the gas-liquid separation tank 6 is used up, all the liquid can be cleaned and emptied with one click. This design can ensure that the liquid replenishment can be carried out automatically during the gas-liquid separation process without manual intervention. In addition, the liquid replenishing component 7 is also equipped with a liquid level display and an upper and lower limit automatic sensing function to ensure that the liquid level is within a safe range and can automatically perform the liquid replenishing operation. The liquid supply component 8 is used to cooperate with the heat exchange component 10, wherein the heat exchange component 10 includes a first heat exchanger 101 and a second heat exchanger 102, which are respectively used to cooperate with the first pump body 41 and the second pump body 42. The first heat exchanger 101 and the second heat exchanger 102 are used to cool the liquid, making it convenient for the liquid to enter the first pump body 41 and the second pump body 42 as a working medium. The first heat exchanger 101 and the second heat exchanger 102 are composed of a partition, a fin, The plate bundle is the core of the plate-fin heat exchanger, and is equipped with necessary heads, pipes, supports, etc. to form a plate-fin heat exchange component 10. The heat exchange component 10 can achieve efficient heat transfer while keeping the two gases isolated from each other through its unique internal structure and efficient heat exchange mechanism. This design not only avoids mixing or contamination between the gases, but also ensures full utilization of thermal energy. The drainage component 9 is a U-shaped pipe body used to discharge the liquid in the gas-liquid separation tank 6.

[0033] The specific embodiments of the present invention described above do not limit the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A liquid ring vacuum pump unit with a pre-condenser, characterized in that: include: A base is provided with a condenser, and an air inlet is provided on the condenser, an air inlet pipe is connected to the air inlet, an end of the air inlet pipe is connected to the liquid ring vacuum pump on the base, the liquid ring vacuum pump is connected to the gas-liquid separation tank on the base through an exhaust pipe, and the gas-liquid separation tank is provided with an exhaust port, and a liquid management component cooperating with the gas-liquid separation tank is also provided on the base.

2. The liquid ring vacuum pump unit with a pre-condenser according to claim 1, characterized in that: The condenser is arranged on a support frame, and the support frame is arranged on the base.

3. The liquid ring vacuum pump unit with a pre-condenser according to claim 1, characterized in that: The liquid ring vacuum pump includes a first pump body and a second pump body, the first pump body and the second pump body are symmetrically installed on the base, and the liquid storage capacity of the first pump body is smaller than that of the second pump body. The condenser and the first pump body and the second pump body are connected through the air intake pipe; the outside of the first pump body and the second pump body are respectively connected to the first motor and the second motor through a coupling.

4. The liquid ring vacuum pump unit with a pre-condenser according to claim 3, characterized in that: The air intake pipe includes a first pipe, a second pipe, a third pipe and a fourth pipe; the first pipe is connected to the condenser, and the first pipe is connected to the second pipe, the second pipe is connected to the first pump body through the third pipe, and the second pipe is connected to the second pump body through the fourth pipe.

5. The liquid ring vacuum pump unit with a pre-condenser according to claim 4, characterized in that: Valves are provided on the third pipeline and the fourth pipeline.

6. The liquid ring vacuum pump unit with a pre-condenser according to claim 5, characterized in that: The exhaust pipe includes a first exhaust pipe and a second air guide pipe, the first exhaust pipe is used to connect the first pump body with the gas-liquid separation tank, and the second air guide pipe is used to connect the second pump body with the gas-liquid separation tank.

7. The liquid ring vacuum pump unit with a pre-condenser according to claim 1, characterized in that: The liquid management component includes a liquid replenishing component; the liquid replenishing component is used to replenish liquid to the gas-liquid separation tank.

8. The liquid ring vacuum pump unit with a pre-condenser according to claim 4, characterized in that: The liquid management component includes a liquid supply component, and the liquid supply component is used to connect the gas-liquid separation tank with the heat exchange component.

9. The liquid ring vacuum pump unit with a pre-condenser according to claim 8, characterized in that: The heat exchange assembly includes a first heat exchanger and a second heat exchanger; the first heat exchanger is connected to the first pump body, and the second heat exchanger is connected to the second pump body.

10. The liquid ring vacuum pump unit with a pre-condenser according to claim 4, characterized in that: The liquid management assembly further includes a drain assembly, which is used to drain excess liquid from the first pump body and the second pump body.

Images