CN213808246U - Steam turbine vacuum system - Google Patents
Steam turbine vacuum system Download PDFInfo
- Publication number
- CN213808246U CN213808246U CN202022182221.9U CN202022182221U CN213808246U CN 213808246 U CN213808246 U CN 213808246U CN 202022182221 U CN202022182221 U CN 202022182221U CN 213808246 U CN213808246 U CN 213808246U
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- water
- vacuum system
- tank
- heat exchanger
- condenser
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Abstract
The utility model provides a steam turbine vacuum system, including the water inlet with penetrate the water jet pump of water tank intercommunication, the delivery port of water jet pump links to each other with penetrating the water ejector, and the air inlet of penetrating the water ejector passes through the exhaust tube and links to each other with the condenser, the export of penetrating the water ejector with penetrate the water tank intercommunication, the delivery port of water jet pump is provided with the branch road and links to each other with the heat dissipation pipeline of heat exchanger, the delivery port of the heat dissipation pipeline of heat exchanger links to each other with the water jet tank. In the scheme, a group of heat exchangers are additionally added on the basis of a steam turbine vacuum system to dissipate the heat of the circulating water in the water injection tank, so that the overhigh water temperature of the water injection tank is avoided.
Description
Technical Field
The utility model relates to a steam turbine field specifically is a steam turbine vacuum system.
Background
In the condensing steam turbine system, steam is condensed in a condenser after acting, and condensed water is pumped into a boiler for circulation, so that working medium water can be saved. The condenser is used for condensing steam into water, and a certain vacuum degree is required to be kept besides cold source circulating water, so that a steam turbine vacuum system is required to pump off part of uncondensed steam and non-condensable gas (air); and simultaneously, before the unit is started, the vacuum of the condenser is established.
The steam turbine vacuum system in the prior art comprises a water jet pump and a water jet air extractor connected with the water jet pump, and the principle is that working water with certain pressure from water discharged from the water jet pump reaches the water jet air extractor, the water jet air extractor converts pressure energy of the pressure water into velocity energy, water flow is ejected from the water jet air extractor at high speed to generate high vacuum, and a steam-gas mixture in a condenser is extracted. The water jet air ejector guides a steam-gas mixture in the condenser and pressure water jetted by the water jet pump into the water jet tank, and a water inlet of the water jet pump is communicated with the water jet tank to form circulation so as to reduce water consumption. Because high-temperature non-condensable gas and a small amount of steam in the condenser enter the incident water tank, the temperature in the water injection tank is inevitably increased gradually to be close to the temperature of working medium water in the condenser, the operating efficiency of a steam turbine vacuum system is reduced due to overhigh water temperature in the water injection tank, the air exhaust effect is poor, the exhaust temperature of the condenser is increased, the negative pressure is reduced, and the efficiency of the steam turbine is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a steam turbine vacuum system prevents to penetrate the temperature too high in the water tank.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a steam turbine vacuum system, includes the water injection pump of water inlet and water injection case intercommunication, and the delivery port of water injection pump links to each other with the water injection air ejector, and the air inlet of water injection air ejector passes through the exhaust tube and links to each other with the condenser, the export of water injection air ejector with water injection case intercommunication, the delivery port of water injection pump is provided with the branch road and links to each other with the heat dissipation pipeline of heat exchanger, the delivery port of the heat dissipation pipeline of heat exchanger with water injection case link to each other.
In the scheme, a group of heat exchangers are additionally added on the basis of a steam turbine vacuum system to dissipate the heat of the circulating water in the water injection tank, so that the overhigh water temperature of the water injection tank is avoided.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The utility model provides a steam turbine vacuum system, includes the water jet pump 20 of water inlet and water jet tank 10 intercommunication, and the delivery port of water jet pump 20 links to each other with water jet air ejector 30, and water jet air ejector 30's air inlet passes through air suction line 40 and links to each other with condenser 1, and water jet air ejector 30's export communicates with water jet tank 10, its characterized in that: the water outlet of the water injection pump 20 is provided with a branch connected with the heat dissipation pipeline of the heat exchanger 50, and the water outlet of the heat dissipation pipeline of the heat exchanger 50 is connected with the water injection tank 10.
In the scheme, a group of heat exchangers are additionally added on the basis of a steam turbine vacuum system to dissipate the heat of the circulating water in the water injection tank 10, so that the overhigh water temperature of the water injection tank 10 is avoided. Wherein the heat exchanger can be other cooling device, and its circulating water route is: the water jet pump 20 introduces part of the circulating water into the heat exchanger 50 for cooling, so that the water temperature of the water jet tank 10 is reduced, and the reduction of the operation efficiency of the steam turbine vacuum system caused by overhigh water temperature is avoided.
The heat absorption pipeline of the heat exchanger 50 is communicated with the cooling water pipeline of the turbine condenser to form a circulation. In this way, a water path is not required to be additionally arranged, and the cooling water path of the steam turbine system is directly utilized to cool the circulating water of the vacuum system.
The water inlet of the heat absorption pipeline of the heat exchanger 50 is communicated with the cooling water inlet pipe 2 of the condenser 1, and the water outlet of the heat absorption pipeline is communicated with the cooling water outlet pipe 3 of the condenser 1. The cooling water inlet pipe 2 of the condenser 1 is low in water temperature, so that the circulating water of the vacuum system can be cooled, and the heated cooling water is directly led out to the cooling water outlet pipe 3 to avoid the increased cooling water from entering the condenser 1 and reducing the efficiency of the condenser 1.
And a water replenishing ball float valve 11 which is opened when the water level is low is arranged on the water injection tank 10. The phenomenon that the water level is too low due to the fact that a large amount of circulating water is volatilized due to too high water temperature of the water injection tank 10 and the lack of sufficient circulating water in a vacuum system is avoided.
The water inlet of the heat absorption pipeline of the heat exchanger 50 is provided with a water inlet valve 51 which is opened when the water temperature of the water injection tank 10 is too high. When the water temperature of the water jetting tank 10 is lower than the outlet water temperature of the working medium water, the heat of the water jetting tank 10 is absorbed from the working medium water through the heat exchanger 50, so that the water temperature of the water jetting tank 10 is rapidly increased, and therefore a water inlet valve which is opened according to the temperature is arranged.
Claims (5)
1. The utility model provides a steam turbine vacuum system, includes jetting pump (20) of water inlet and jetting tank (10) intercommunication, the delivery port and the water jet air ejector (30) of jetting pump (20) link to each other, and the air inlet of water jet air ejector (30) passes through extraction duct (40) and links to each other with condenser (1), and the export and the jetting tank (10) intercommunication of water jet air ejector (30), its characterized in that: the water outlet of the water jet pump (20) is provided with a branch which is connected with a heat dissipation pipeline of the heat exchanger (50), and the water outlet of the heat dissipation pipeline of the heat exchanger (50) is connected with the water jet tank (10).
2. The turbine vacuum system of claim 1 wherein: and a heat absorption pipeline of the heat exchanger (50) is communicated with a cooling water pipeline of a steam turbine condenser to form a circulation.
3. The turbine vacuum system of claim 1 wherein: and a water inlet of a heat absorption pipeline of the heat exchanger (50) is communicated with a cooling water inlet pipe (2) of the condenser (1), and a water outlet of the heat absorption pipeline is communicated with a cooling water outlet pipe (3) of the condenser (1).
4. The turbine vacuum system of claim 1 wherein: and a water replenishing ball float valve (11) which is opened when the water level is low is arranged on the water injection tank (10).
5. The turbine vacuum system of claim 1 wherein: a water valve (51) which is opened when the temperature of the water in the water jetting tank (10) is too high is arranged at the water outlet of the heat absorption pipeline of the heat exchanger (50).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022182221.9U CN213808246U (en) | 2020-09-27 | 2020-09-27 | Steam turbine vacuum system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022182221.9U CN213808246U (en) | 2020-09-27 | 2020-09-27 | Steam turbine vacuum system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213808246U true CN213808246U (en) | 2021-07-27 |
Family
ID=76956005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022182221.9U Active CN213808246U (en) | 2020-09-27 | 2020-09-27 | Steam turbine vacuum system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213808246U (en) |
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2020
- 2020-09-27 CN CN202022182221.9U patent/CN213808246U/en active Active
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