A steam power plant condenser vacuum extraction pipeline drainage device

Abstract

The utility model discloses a kind of power plant condenser vacuum extraction pipeline drainage device, including condenser and vacuum extraction pipeline, the vacuum extraction pipeline is communicated with the vacuum tube bundle of condenser, water ring vacuum pump is connected on the vacuum extraction pipeline, isolation valve is also connected on the vacuum extraction pipeline, still including drainage device, the drainage device includes drainage pipeline one, drainage device primary valve, drain tank, drainage pipeline two, drainage device secondary valve, the one end of the drainage pipeline one is communicated with vacuum extraction pipeline, drainage device primary valve is installed on drainage pipeline one, the other end of drainage pipeline one is communicated with drain tank, drainage pipeline two is communicated with drain tank outlet, drainage device secondary valve is installed on drainage pipeline two. The utility model is through reasonable design and configuration, effectively solve the problems such as water, corrosion, impurity accumulation in vacuum extraction system, improve the operation efficiency, reliability and economy of system, while being convenient for maintenance and overhaul.

Description

Technical Field

[0001] This utility model relates to the field of vacuum technology in thermal power plants, and in particular to a drainage device for vacuum pipelines in thermal power plant condensers. Background Technology

[0002] The vacuum system in a thermal power plant is a crucial component, primarily used to maintain a vacuum environment within the condenser and improve the thermal efficiency of the steam turbine. The exhaust steam from the turbine is cooled into condensate in the condenser, its volume drastically reducing, thus creating a high vacuum within the condenser. To maintain this vacuum, air and other non-condensable gases leaking into the condenser need to be continuously extracted. A water ring vacuum pump uses the centrifugal force of the water ring, generated by the rotation of its impeller, to create a vacuum and extract the gases. The design, operation, and maintenance of the vacuum system in a thermal power plant are essential for improving the unit's thermal efficiency and safety. Optimizing the vacuum system can effectively reduce energy consumption and improve power generation efficiency.

[0003] The media in the vacuum system piping of a thermal power plant are mainly water vapor and air. During system operation, because the ambient temperature is lower than the condenser temperature, water vapor condenses inside the piping. When the condensate fills the piping, it hinders the vacuum equipment from pumping air, leading to a decrease in condenser vacuum. Water vapor in the vacuum system piping condenses into water at lower ambient temperatures. When there is excessive condensate, it occupies piping space, hindering the extraction of air and other non-condensable gases. Condensate also increases resistance within the piping, reducing vacuum efficiency. A decrease in condenser vacuum leads to an increase in turbine exhaust pressure and temperature, thus reducing turbine thermal efficiency. A decrease in vacuum can also cause an increase in low-pressure cylinder exhaust temperature, triggering thermal expansion or deformation of the low-pressure rotor, increasing unit vibration amplitude, and affecting the safe operation of the turbine. Utility Model Content

[0004] The purpose of this utility model is to overcome the deficiencies of existing technologies and provide a condensate draining device for the vacuum pipe of a condenser in a thermal power plant.

[0005] This utility model is achieved through the following technical solution:

[0006] A condenser vacuum pipe draining device for a thermal power plant includes a condenser and a vacuum pipe. The vacuum pipe is connected to the vacuum tube bundle of the condenser. A water ring vacuum pump is connected to the vacuum pipe. An isolation valve is also connected to the vacuum pipe. The device also includes a draining device, which includes a draining pipe one, a primary valve, a drain tank, a draining pipe two, and a secondary valve. One end of the draining pipe one is connected to the vacuum pipe. The primary valve is installed on the draining pipe one. The other end of the draining pipe one is connected to the drain tank. The draining pipe two is connected to the outlet of the drain tank. The secondary valve is installed on the draining pipe two.

[0007] The aforementioned drainage device also includes a drainage device drain valve and a drain pipe, wherein the drain pipe is connected to the drainage tank and the drainage device drain valve is installed on the drain pipe.

[0008] The isolation valve is provided in three parts, which are connected in series.

[0009] There are two water ring vacuum pumps, which are connected between three isolation valves.

[0010] The hydrophobic device is connected at the lowest point of the main pipe of the vacuum pumping pipeline.

[0011] The other end of the drainage pipe is connected to the hot well inlet of the condenser.

[0012] Working principle of this utility model:

[0013] Basic operation of the vacuum system:

[0014] The water ring vacuum pump extracts air and other non-condensable gases from the vacuum tube bundle of the condenser through a vacuum pumping pipe to maintain the vacuum state inside the condenser.

[0015] The vacuum pipeline is equipped with an isolation valve to control the opening and closing of the vacuum system and to facilitate maintenance and repair.

[0016] The function of a hydrophobic device:

[0017] During the vacuuming process, the water ring vacuum pump may introduce some cooling water or condensate into the vacuuming pipeline. This water needs to be drained in time to prevent water accumulation, corrosion, and disruption of the normal operation of the vacuum pump.

[0018] The condensate trap draws water from the vacuum pipe into a condensate tank via a condensate drain pipe. The condensate tank serves to temporarily store and separate the water.

[0019] The second drainage pipe drains the water from the drainage tank and finally discharges it into the hot well inlet of the condenser, thus realizing the recycling of water resources.

[0020] Sewage discharge function:

[0021] The bottom of the condensate tank is equipped with a drain pipe and a drain valve to periodically remove any impurities and dirt that may accumulate inside the tank, preventing blockages and corrosion.

[0022] Multi-stage isolation and vacuum pump configuration:

[0023] The three isolation valves are connected in series, which enhances the system's sealing and reliability and prevents air leakage.

[0024] Two water ring vacuum pumps are connected between three isolation valves, which can be switched or operated in parallel as needed to improve the redundancy and flexibility of the system.

[0025] The advantages of this utility model are: (1) It prevents water accumulation and corrosion in pipes.

[0026] By using a drainage device to promptly drain water from the vacuum pipes, corrosion and blockage caused by water accumulation can be avoided, thus extending the service life of the pipes and equipment.

[0027] (2) Improve the efficiency and reliability of the vacuum system:

[0028] The hydrophobic device ensures that the vacuum pipeline remains dry, reducing the impact of moisture on the performance of the vacuum pump and improving the pumping efficiency and stability of the vacuum system.

[0029] (3) Water resource recycling:

[0030] The second drainage pipe discharges the water in the drainage tank into the hot well inlet of the condenser, realizing the recycling of water resources, reducing the waste of cooling water, and meeting the requirements of energy conservation and emission reduction.

[0031] (4) Easy to maintain and repair:

[0032] The design of the condensate trap and isolation valve allows for convenient maintenance and repair of the vacuum system during operation. For example, by closing the isolation valve, the system can be isolated for localized repairs or component replacement without affecting the overall system operation.

[0033] (5) Prevent the accumulation of impurities:

[0034] The drainage function at the bottom of the condensate tank can regularly remove impurities and dirt from the tank, preventing blockages and corrosion caused by the accumulation of impurities, and further improving the system's operating efficiency and reliability.

[0035] (6) The water drainage device for the vacuum pipeline of the condenser in the thermal power plant has effectively solved the problems of water accumulation, corrosion and impurity accumulation in the vacuum system through reasonable design and configuration, which improves the system's operating efficiency, reliability and economy, and facilitates maintenance and repair. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the prior art structure of this utility model;

[0037] Figure 2 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0038] like Figure 1As shown, in existing technologies, the vacuum piping of condensers in thermal power plants does not have a condensate trap. During system operation, because the ambient temperature is lower than the condenser temperature, water vapor condenses inside the piping. When the condensed water fills the piping, it hinders the vacuum pumping equipment, resulting in a decrease in the condenser vacuum. To address these shortcomings, this invention provides an improvement, as detailed below: Example 1:

[0039] like Figure 2 As shown, a condensate draining device for a vacuum pipe 2 of a condenser 1 in a thermal power plant includes a condenser 1 and a vacuum pipe 2. The vacuum pipe 2 is connected to the vacuum tube bundle of the condenser 1. A water ring vacuum pump 3 is connected to the vacuum pipe 2, and an isolation valve 4 is also connected to the vacuum pipe 2. The device also includes a draining device comprising a first drain pipe 5, a primary draining valve 6, a drain tank 7, a second drain pipe 8, and a secondary draining valve 9. One end of the first drain pipe 5 is connected to the vacuum pipe 2, the primary draining valve 6 is installed on the first drain pipe 5, and the other end of the first drain pipe 5 is connected to the drain tank 7. The second drain pipe 8 is connected to the outlet of the drain tank 7, and the secondary draining valve 9 is installed on the second drain pipe 8. The draining device promptly drains water accumulated in the vacuum pipe 2, preventing corrosion and blockage caused by water accumulation in the pipe, and extending the service life of the pipe and equipment. The hydrophobic device ensures that the vacuum pipe 2 remains dry, reducing the impact of moisture on the performance of the vacuum pump and improving the pumping efficiency and stability of the vacuum system. Example 2:

[0040] like Figure 2 As shown, a condenser condenser vacuum pipe 2 draining device for a condenser 1 in a thermal power plant includes a condenser 1 and a vacuum pipe 2. The vacuum pipe 2 is connected to the vacuum tube bundle of the condenser 1. A water ring vacuum pump 3 is connected to the vacuum pipe 2. An isolation valve 4 is also connected to the vacuum pipe 2. The device also includes a draining device, which includes a draining pipe 5, a primary draining device valve 6, a drain tank 7, a draining pipe 8, and a secondary draining device valve 9. One end of the draining pipe 5 is connected to the vacuum pipe 2. The primary draining device valve 6 is installed on the draining pipe 5. The other end of the draining pipe 5 is connected to the drain tank 7. The draining pipe 8 is connected to the outlet of the drain tank 7. The secondary draining device valve 9 is installed on the draining pipe 8.

[0041] The drainage device also includes a drainage device drain valve 10 and a drain pipe 11. The drain pipe 11 is connected to the drainage tank 7, and the drainage device drain valve 10 is installed on the drain pipe 11. The drainage function at the bottom of the drainage tank 7 can periodically discharge impurities and dirt from the tank, preventing blockage and corrosion caused by the accumulation of impurities, and further improving the operating efficiency and reliability of the system. Example 3:

[0042] like Figure 2 As shown, a condenser condenser vacuum pipe 2 draining device for a condenser 1 in a thermal power plant includes a condenser 1 and a vacuum pipe 2. The vacuum pipe 2 is connected to the vacuum tube bundle of the condenser 1. A water ring vacuum pump 3 is connected to the vacuum pipe 2. An isolation valve 4 is also connected to the vacuum pipe 2. The device also includes a draining device, which includes a draining pipe 5, a primary draining device valve 6, a drain tank 7, a draining pipe 8, and a secondary draining device valve 9. One end of the draining pipe 5 is connected to the vacuum pipe 2. The primary draining device valve 6 is installed on the draining pipe 5. The other end of the draining pipe 5 is connected to the drain tank 7. The draining pipe 8 is connected to the outlet of the drain tank 7. The secondary draining device valve 9 is installed on the draining pipe 8.

[0043] The drainage device also includes a drainage device drain valve 10 and a drain pipe 11. The drain pipe 11 is connected to the drainage tank 7, and the drainage device drain valve 10 is installed on the drain pipe 11.

[0044] The isolation valve 4 is provided in three parts, which are connected in series to enhance the sealing and reliability of the system and prevent air leakage.

[0045] There are two water ring vacuum pumps 3, which are connected between three isolation valves 4. They can be switched or operated in parallel as needed to improve the redundancy and flexibility of the system.

[0046] The hydrophobic device is connected to the lowest point of the main pipe of the vacuum pipe 2.

[0047] The other end of the second drain pipe 8 is connected to the hot well inlet of the condenser 1. The second drain pipe 8 discharges water from the drain tank 7 into the hot well inlet of the condenser 1, realizing the recycling of water resources, reducing the waste of cooling water, and meeting the requirements of energy conservation and emission reduction.

[0048] A condensate drain is installed at the lowest point of the vacuum main pipe. The water flows through the primary valve 6, the condensate tank 7, and the secondary valve 9 of the condensate drain in sequence, and finally into the hot well at the bottom of the condenser 1. During normal operation, the water accumulated in the vacuum pipe 2 is discharged into the hot well of the condenser 1 through the condensate drain, thereby eliminating the water accumulation in the vacuum pipe 2.

[0049] When overhauling the vacuum system, start from the lowest point of the vacuum main pipe and drain the water from the pipe through the primary valve 6 of the condensate drain device, the condensate tank 7, and the drain valve 10 of the condensate drain device in sequence to facilitate system maintenance.

Claims

1. A steam power plant condenser vacuum extraction pipeline drain device, characterized by: It includes a condenser and a vacuum pipe, the vacuum pipe being connected to the vacuum tube bundle of the condenser. A water ring vacuum pump is connected to the vacuum pipe, and an isolation valve is also connected to the vacuum pipe. It also includes a condensate drain device, which includes a first condensate drain pipe, a primary valve of the condensate drain device, a condensate tank, a second condensate drain pipe, and a secondary valve of the condensate drain device. One end of the first condensate drain pipe is connected to the vacuum pipe, the primary valve of the condensate drain device is installed on the first condensate drain pipe, the other end of the first condensate drain pipe is connected to the condensate tank, the second condensate drain pipe is connected to the outlet of the condensate tank, and the secondary valve of the condensate drain device is installed on the second condensate drain pipe.

2. A steam power plant condenser vacuum extraction pipeline drainage device according to claim 1, characterized in that: The aforementioned drainage device also includes a drainage device drain valve and a drain pipe, wherein the drain pipe is connected to the drainage tank and the drainage device drain valve is installed on the drain pipe.

3. A condensate draining device for a condenser vacuum pipe in a thermal power plant according to claim 1, characterized in that: The isolation valve is provided in three parts, which are connected in series.

4. A condensate draining device for a condenser vacuum pipeline in a thermal power plant according to claim 3, characterized in that: There are two water ring vacuum pumps, which are connected between three isolation valves.

5. A condensate draining device for a condenser vacuum pipe in a thermal power plant according to claim 1, characterized in that: The hydrophobic device is connected at the lowest point of the main pipe of the vacuum pumping pipeline.

6. A condensate draining device for a condenser vacuum pipe in a thermal power plant according to claim 1, characterized in that: The other end of the drainage pipe is connected to the hot well inlet of the condenser.

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