CN107036454B - Vacuum adjusting device of steam turbine condenser and control method thereof - Google Patents
Vacuum adjusting device of steam turbine condenser and control method thereof Download PDFInfo
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- CN107036454B CN107036454B CN201710295371.0A CN201710295371A CN107036454B CN 107036454 B CN107036454 B CN 107036454B CN 201710295371 A CN201710295371 A CN 201710295371A CN 107036454 B CN107036454 B CN 107036454B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/10—Auxiliary systems, arrangements, or devices for extracting, cooling, and removing non-condensable gases
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Abstract
The invention relates to a vacuum regulating device of a steam turbine condenser and a control method thereof. Therefore, the vacuum adjusting device of the turbine condenser and the control method thereof can automatically adjust the vacuum degree in the condenser, and have safe process and accurate result.
Description
Technical Field
The invention relates to a vacuum adjusting device of a steam turbine condenser and a control method thereof, belonging to the technical field of steam turbine power generation.
Background
The vacuum system is an important auxiliary system of the steam turbine, and the steam turbine vacuum system mainly comprises a condenser, a circulating water pump, a condensate pump, an air extractor and the like.
The condenser is used for: reducing the exhaust pressure of the steam turbine to form high vacuum so as to increase the ideal enthalpy drop of the steam in the steam turbine; cooling the steam turbine exhaust to form condensed water, and recovering the working medium and a part of heat; recovering the drained water during the start and stop of the unit; and carrying out primary vacuum deoxidization on the condensed water and the water supplemented by the condenser.
The air extractor has two functions: firstly, in the starting and stopping processes of the unit, air in a condenser is pumped out, and starting vacuum is established; and secondly, in the running of the unit, noncondensable gases such as air and steam leaked into the condenser are continuously pumped out, and the vacuum in the condenser is maintained, so that the working efficiency of the condenser is ensured and the economic efficiency of the unit is improved.
The circulating water pump has the following functions: the condenser and other coolers (air cooler, oil cooler) are continuously supplied with cooling water at a certain pressure and flow rate to ensure the working requirements of the condenser and other coolers.
The condensed water pump has the following functions: the condensed water in the condenser is continuously conveyed out and is conveyed to the deaerator to be used as boiler water supply so as to achieve the effect of recycling the working medium.
Under some conditions, such as medium-speed warm-up in the starting stage of the turbine or reduction of the idle time after the turbine is disconnected, the established vacuum degree needs to be damaged to a certain extent, and the conventional method comprises the following steps: the vacuum regulating valve is manually opened by an operator, the working effect of the air extractor is reduced, and the vacuum is slowly regulated by air leaked into the condenser or uncondensed steam. The disadvantages of this method are: the vacuum adjusting speed is slow, and the adjusting means is passive; the method is purely operated manually, so that the misoperation probability is increased, and certain safety risk is brought to the unit operation.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a vacuum regulator for a steam turbine condenser and a control method thereof, which can safely and accurately regulate the degree of vacuum in the steam turbine condenser.
In order to achieve the purpose, the invention provides a vacuum adjusting device of a steam turbine condenser, which adopts the following technical scheme: a vacuum regulating device of a steam turbine condenser is characterized in that the condenser is connected to a steam exhaust port of a steam turbine, the condenser is connected to an air suction port of an air extractor through a connecting pipeline, and a vacuum isolation valve is arranged on the connecting pipeline; the condenser is also connected with a vacuum degree measuring instrument and a first vacuum degree regulating valve, the first vacuum degree regulating valve is provided with a first air inlet communicated with the outside atmosphere, the vacuum degree measuring instrument and the first vacuum degree regulating valve are both connected with the control device, the vacuum degree measuring instrument detects the vacuum degree in the condenser and sends measurement information to the control device, and the control device adjusts the opening degree of the first air inlet of the first vacuum degree regulating valve according to the received measurement information.
Preferably, the first vacuum degree regulating valve is connected to the condenser through a first connecting pipe; the condenser is also connected with a vacuum breaker valve, the vacuum breaker valve is connected with the condenser through a second connecting pipe, and the vacuum breaker valve is provided with a second air inlet communicated with the outside atmosphere; the diameter of the second connecting pipe is larger than that of the first connecting pipe.
Preferably, the condenser is also connected with a vacuum breaker valve, the vacuum breaker valve is connected with the condenser through a second connecting pipe, and the vacuum breaker valve is provided with a second air inlet communicated with the outside atmosphere; the first vacuum degree regulating valve is connected to the second connecting pipe through a first connecting pipe; the diameter of the second connecting pipe is larger than that of the first connecting pipe.
Preferably, the air outlet of the air pump is connected with a gas-water separator, and the gas-water separator is provided with an outlet communicated with the outside atmosphere.
More preferably, a branch interface is arranged on the gas-water separator, a connecting port is arranged on a connecting pipeline between the vacuum isolation valve and the air suction port of the air pump, a branch pipeline is connected between the connecting port and the branch interface, and a second vacuum degree regulating valve is arranged on the branch pipeline.
Corresponding to the vacuum regulating device of the steam turbine condenser, the invention also provides a control method of the vacuum regulating device of the steam turbine condenser, which adopts the following technical scheme: a control method of a vacuum regulating device of a steam turbine condenser adopts the technical scheme or any preferable technical scheme to carry out operation, and comprises the following operation steps: 1) When the air pump vacuumizes the condenser, the vacuum isolation valve is opened, and the first vacuum degree adjusting valve is closed; 2) When the vacuum degree in the condenser needs to be reduced, the control device adjusts the first vacuum degree adjusting valve to increase the opening degree of the first air inlet, and outside air enters the condenser from the first air inlet to reduce the vacuum degree in the condenser; the control device acquires the vacuum degree in the condenser from the vacuum degree measuring instrument; when the vacuum degree in the condenser is reduced to a first expected value, the control device stops adjusting the opening degree of a first air inlet of the first vacuum degree adjusting valve; 3) When the vacuum degree in the condenser needs to be increased, the control device adjusts the first vacuum degree adjusting valve to reduce the opening degree of the first air inlet so as to increase the vacuum degree in the condenser; the control device acquires the vacuum degree in the condenser from the vacuum degree measuring instrument; and when the vacuum degree in the condenser is increased to a second expected value, the control device stops adjusting the opening degree of the first air inlet of the first vacuum degree adjusting valve.
Preferably, a vacuum breaker valve is connected to the condenser, the vacuum breaker valve is provided with a second air inlet communicated with the outside atmosphere, and the second air inlet is larger than the first air inlet; the method also comprises the following operation steps: 4) And when the vacuum degree in the condenser needs to be broken, opening the vacuum breaking valve to enable the external atmosphere to enter the condenser from the second air inlet.
Preferably, the air outlet of the air pump is connected with a gas-water separator, and the gas-water separator is provided with an air outlet communicated with the outside atmosphere; a branch pipeline is connected between the connecting port and the branch interface, and a second vacuum degree regulating valve is arranged on the branch pipeline; also comprises the following steps: 5) When the vacuum degree in the condenser needs to be reduced, the second vacuum adjusting valve can be adjusted to enable the branch pipeline to be conducted.
As described above, the vacuum regulator for a turbine condenser and the control method thereof according to the present invention have the following advantageous effects: in the vacuum regulating device of the steam turbine condenser, the condenser is connected with the vacuum degree measuring instrument and the first vacuum degree regulating valve, and the vacuum degree measuring instrument and the first vacuum degree regulating valve are both connected with the control device, so that when the air extractor performs vacuum pumping on the inside of the condenser, the vacuum degree measuring instrument detects the vacuum degree of the inside of the condenser and sends measurement information to the control device, and the control device regulates the opening degree of the first air inlet of the first vacuum degree regulating valve according to the received measurement information, so that the vacuum degree of the inside of the condenser is regulated to a desired value. Therefore, the vacuum adjusting device of the steam turbine condenser and the control method thereof can automatically adjust the vacuum degree in the condenser, and have safe process and accurate result.
Drawings
Fig. 1 is a schematic diagram showing a connection form of equipment such as a condenser and a steam turbine in a power plant system.
Fig. 2 is a schematic structural view showing a vacuum regulator of a turbine condenser according to the present invention.
Description of the element reference numerals
1. First vacuum degree regulating valve of steam inlet pipeline 14
2. Bypass duct 15 first air inlet
3. Bypass control valve 16 first connecting pipe
4. Steam turbine 17 vacuum breaker valve
5. Second connecting pipe of generator 18
6. Steam outlet 19 second air inlet
7. Air outlet of condenser 20
8. 21 gas-water separator for water supply pipeline
9. Outlet of connecting pipe 22
10. Branch interface of air pump 23
11. Air inlet 24 connecting port
12. Vacuum isolation valve 25 branch pipeline
13. 26 second vacuum degree regulating valve of vacuum degree measuring instrument
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are used for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms may be changed or adjusted without substantial change in the technical content.
In a power plant adopting a steam turbine for power generation, a condenser is one of important devices, fig. 1 shows a relatively common connection structure of the condenser in a power plant with a steam turbine 4, a steam inlet pipeline 1 is connected with a boiler, high-temperature and high-pressure steam flowing out of the boiler enters the steam turbine 4 to do work and finally flows out of a steam outlet 6 of the steam turbine 4, a bypass pipeline 2 is arranged between the steam inlet pipeline 1 and the steam outlet 6 of the steam turbine 4, a bypass control valve 3 is connected to the bypass pipeline 2, during a starting stage of the steam turbine 4, part of the steam in the steam inlet pipeline 1 enters the steam turbine 4 to warm the steam turbine 4 and enable the steam turbine 4 to rotate at a low speed, the other part of the steam is discharged into the condenser 7 through the bypass pipeline 2, the opening degree of the bypass control valve 3 is gradually reduced, the steam entering the steam turbine 4 is increased, and the rotation speed of the steam turbine 4 is increased until grid-connected power generation. The turbine of the steam turbine 4 rotates to drive the generator 5 to generate electricity; the condenser 7 is connected to the exhaust port 6 of the steam turbine 4, the steam flowing into the condenser 7 from the exhaust port 6 of the steam turbine 4 is condensed into water and is pressed to the boiler through a water supply pipeline 8 by a water supply pump, and the boiler heats the liquid water entering the boiler into high-temperature high-pressure steam which is then input to the steam turbine 4 to do work.
As shown in fig. 2, the present invention provides a vacuum regulating device for a steam turbine condenser, wherein the condenser 7 is connected to a steam exhaust port 6 of a steam turbine 4, the condenser 7 is connected to an air suction port 11 of an air extractor 10 through a connecting pipeline 9, and a vacuum isolation valve 12 is arranged on the connecting pipeline 9; the condenser 7 is further connected with a vacuum degree measuring instrument 13 and a first vacuum degree adjusting valve 14, the first vacuum degree adjusting valve 14 is provided with a first air inlet 15 communicated with the outside atmosphere, the vacuum degree measuring instrument 13 and the first vacuum degree adjusting valve 14 are both connected with a control device, the vacuum degree measuring instrument 13 detects the vacuum degree in the condenser 7 and sends measurement information to the control device, and the control device adjusts the opening degree of the first air inlet 15 of the first vacuum degree adjusting valve 14 according to the received measurement information. Because the condenser 7 is connected with the vacuum degree measuring instrument 13 and the first vacuum degree regulating valve 14, and the vacuum degree measuring instrument 13 and the first vacuum degree regulating valve 14 are both connected with the control device, when the air extractor 10 vacuumizes the condenser 7, the vacuum degree measuring instrument 13 detects the vacuum degree in the condenser 7 and sends measurement information to the control device, and the control device adjusts the opening degree of the first air inlet 15 of the first vacuum degree regulating valve 14 according to the received measurement information, so that the vacuum degree in the condenser 7 is adjusted to an expected value. Therefore, the vacuum adjusting device for the steam turbine condenser can automatically adjust the vacuum degree in the condenser 7, and is safe in process, easy to control and accurate in result.
In the starting and stopping processes of the turbine 4 unit, the air extractor 10 extracts air in the condenser 7 to keep a higher vacuum degree in the condenser 7; during the operation of the unit, the air pump 10 continuously pumps noncondensable gases such as air and steam leaked into the condenser 7, and maintains the vacuum degree in the condenser 7, so that the working efficiency of the condenser 7 is ensured and the economic efficiency of the unit is improved. In a vacuum regulator for a steam turbine condenser according to the present invention, when an air ejector 10 evacuates a condenser 7, a vacuum isolation valve 12 is opened to conduct a connection pipe 9. As shown in fig. 2, in a preferred embodiment, the first vacuum degree control valve 14 is connected to the condenser 7 through a first connection pipe 16; in some emergency situations, it is necessary to rapidly break the vacuum degree in the condenser 7 to rapidly reduce the vacuum degree in the condenser 7, for this purpose, as shown in fig. 2, a vacuum break valve 17 is further connected to the condenser 7, the vacuum break valve 17 is connected to the condenser 7 through a second connecting pipe 18, and the vacuum break valve 17 has a second air inlet 19 communicated with the external atmosphere; the diameter of the second connection pipe 18 is larger than the diameter of the first connection pipe 16, and the maximum opening degree to which the second inlet port 19 of the vacuum breaker valve 17 can be opened is larger than the maximum opening degree to which the first inlet port 15 of the first vacuum degree adjustment valve 14 can be opened, so that the vacuum degree in the condenser 7 can be rapidly broken by opening the vacuum breaker valve 17, and the vacuum degree in the condenser 7 can be rapidly reduced. Preferably, the first vacuum degree control valve 14 may be connected to the second connection pipe 18 through the first connection pipe 16. In order to prevent the vacuum degree in the condenser 7 from being reduced too fast, the pipe diameter of the first connecting pipe 16 can be set to be relatively small, so that the flow speed of the outside air entering the condenser 7 can be limited, the diameter of the first connecting pipe 16 is set according to the vacuum degree range required to be adjusted, and similarly, the first vacuum degree adjusting valve 14 with the relatively small maximum valve port opening degree can also be used for limiting the flow speed of the outside air entering the condenser 7, so that the vacuum degree in the condenser 7 is prevented from being reduced too fast.
In order to maintain a high degree of vacuum in the condenser 7 by extracting the residual steam in the condenser 7 by the air extractor 10, as shown in fig. 2, a gas-water separator 21 is connected to an air outlet 20 of the air extractor 10, the gas-water separator 21 has an outlet 22 communicating with the outside atmosphere, the air extractor 10 extracts the residual steam from the condenser 7 and discharges the residual steam into the gas-water separator 21, the temperature of the residual steam is lowered in the gas-water separator 21 to condense into water and store the water in the gas-water separator 21, and the residual gas that cannot be condensed in the residual steam is discharged to the atmosphere from the outlet 22 of the gas-water separator 21. As a preferable mode, as shown in fig. 2, a branch connection port 23 is provided on the moisture separator 21, a connection port 24 is provided on the connection pipe 9 between the vacuum isolation valve 12 and the suction port 11 of the air exhauster 10, a branch pipe 25 is connected between the connection port 24 and the branch connection port 23, a second vacuum degree adjustment valve 26 is provided on the branch pipe 25, and when the second vacuum degree adjustment valve 26 is opened, the branch pipe 25 can be conducted, the moisture separator 21 communicates with the suction port 11 of the air exhauster 10, and the air sucked by the suction port 11 of the air exhauster 10 is the sum of the air introduced into the suction port 11 of the air exhauster 10 from the condenser 7 and the moisture separator 21, so that the opening degree of the second vacuum degree adjustment valve 26 is increased when the power of the air exhauster 10 is not changed, the steam sucked by the air exhauster 10 from the condenser 7 is decreased, and the vacuum degree in the condenser 7 is decreased. When the vacuum degree in the condenser 7 needs to be increased, the opening degree of the valve port of the second vacuum degree adjusting valve 26 is closed to be completely closed. Therefore, the vacuum degree in the condenser 7 can be adjusted by adjusting the second vacuum degree adjustment valve 26.
Corresponding to the vacuum adjusting device of the steam turbine condenser, the invention also provides a control method of the vacuum adjusting device of the steam turbine condenser, which adopts the following technical scheme: a control method of a vacuum regulating device of a steam turbine condenser adopts the technical scheme or any preferable technical scheme to carry out operation, and comprises the following operation steps:
1) When the air pump 10 vacuumizes the condenser 7, the vacuum isolation valve 12 is opened, and the first vacuum degree regulating valve 14 is closed;
2) When the vacuum degree in the condenser 7 needs to be reduced, the control device adjusts the first vacuum degree adjusting valve 14 to increase the opening degree of the first air inlet 15, and outside air enters the condenser 7 from the first air inlet 15 to reduce the vacuum degree in the condenser 7; the control device acquires the vacuum degree in the condenser 7 from the vacuum degree measuring instrument 13; when the vacuum degree in the condenser 7 is reduced to a first expected value, the control device stops adjusting the opening degree of the first air inlet 15 of the first vacuum degree adjusting valve 14;
3) When the vacuum degree in the condenser 7 needs to be increased, the control device adjusts the first vacuum degree adjusting valve 14 to reduce the opening degree of the first air inlet 15, so that the vacuum degree in the condenser 7 is increased; the control device acquires the vacuum degree in the condenser 7 from the vacuum degree measuring instrument 13; when the vacuum degree in the condenser 7 rises to a second desired value, the control device stops adjusting the opening degree of the first air inlet 15 of the first vacuum degree adjusting valve 14.
In the above steps 2) and 3), the first expected value and the second expected value are preset in the control device, and specific numerical values of the first expected value and the second expected value are determined according to actual conditions, which cannot be listed one by one here. Corresponding to the vacuum adjusting device of the steam turbine condenser of the present invention, the control method of the vacuum adjusting device of the steam turbine condenser of the present invention certainly has the beneficial technical effects of the vacuum adjusting device of the steam turbine condenser of the present invention, and details are not repeated here.
As shown in fig. 2, a vacuum break valve 17 is connected to the condenser 7, the vacuum break valve 17 has a second inlet port 19 communicating with the outside atmosphere, and the second inlet port 19 is larger than the first inlet port 15; as a preferred aspect, the method for controlling a vacuum regulator of a steam turbine condenser according to the present invention further includes the steps of:
4) When the vacuum degree in the condenser 7 needs to be broken, the vacuum breaking valve 17 is opened to enable the external atmosphere to enter the condenser 7 from the second air inlet 19, and therefore the vacuum degree in the condenser 7 is reduced. In this way, in the event of some emergency, the vacuum in the condenser 7 can be broken by opening the vacuum break valve 17.
As shown in fig. 2, a gas-water separator 21 is connected to a gas outlet 20 of the air extractor 10, and the gas-water separator 21 has a gas outlet 20 communicated with the outside atmosphere; a branch connector 23 is arranged on the gas-water separator 21, a connecting port 24 is arranged on a connecting pipeline 9 between the vacuum isolation valve 12 and the air suction port 11 of the air pump 10, a branch pipeline 25 is connected between the connecting port 24 and the branch connector 23, and a second vacuum degree regulating valve 26 is arranged on the branch pipeline 25; the control method of the vacuum adjusting device of the steam turbine condenser further comprises the following steps:
5) When the vacuum degree in the condenser 7 needs to be reduced, the second vacuum regulating valve can be regulated to enable the branch pipeline 25 to be conducted.
As described above, when the power of the air extractor 10 is not changed, the opening degree of the second vacuum degree control valve 26 is increased, and the steam sucked from the condenser 7 by the air extractor 10 is reduced, so that the vacuum degree in the condenser 7 is reduced. When the vacuum degree in the condenser 7 needs to be increased, the opening degree of the valve port of the second vacuum degree adjusting valve 26 is closed to be completely closed. Therefore, the vacuum degree in the condenser 7 can be adjusted by adjusting the second vacuum degree adjustment valve 26.
Based on the technical scheme of the embodiment, the vacuum adjusting device of the steam turbine condenser and the control method thereof can automatically adjust the vacuum degree in the condenser, and are safe in process and accurate in result.
In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. The utility model provides a vacuum adjusting device of steam turbine condenser, condenser (7) are connected in steam extraction mouth (6) of steam turbine (4), characterized by: the condenser (7) is connected to an air suction port (11) of an air pump (10) through a connecting pipeline (9), and a vacuum isolation valve (12) is arranged on the connecting pipeline (9); still be connected with vacuum measuring apparatu (13) and first vacuum governing valve (14) on condenser (7), first vacuum governing valve (14) have with external atmosphere intercommunication first air inlet (15), vacuum measuring apparatu (13), first vacuum governing valve (14) all are connected with controlling means, and vacuum measuring apparatu (13) detect the vacuum in condenser (7) and send measurement information to controlling means, and controlling means adjusts the aperture size of first air inlet (15) of first vacuum governing valve (14) according to the measurement information who receives.
2. The vacuum regulator of a steam turbine condenser according to claim 1, wherein: the first vacuum degree regulating valve (14) is connected to the condenser (7) through a first connecting pipe (16); the condenser (7) is also connected with a vacuum breaker valve (17), the vacuum breaker valve (17) is connected to the condenser (7) through a second connecting pipe (18), and the vacuum breaker valve (17) is provided with a second air inlet (19) communicated with the outside atmosphere; the diameter of the second connecting pipe (18) is greater than the diameter of the first connecting pipe (16).
3. The vacuum regulator of a steam turbine condenser according to claim 1, wherein: the condenser (7) is also connected with a vacuum breaker valve (17), the vacuum breaker valve (17) is connected to the condenser (7) through a second connecting pipe (18), and the vacuum breaker valve (17) is provided with a second air inlet (19) communicated with the outside atmosphere; the first vacuum degree regulating valve (14) is connected to a second connecting pipe (18) through a first connecting pipe (16); the diameter of the second connecting pipe (18) is larger than the diameter of the first connecting pipe (16).
4. The vacuum regulator of a steam turbine condenser according to claim 1, wherein: the air outlet (20) of the air pump (10) is connected with a gas-water separator (21), and the gas-water separator (21) is provided with an outlet (22) communicated with the outside atmosphere.
5. The vacuum regulator of a steam turbine condenser according to claim 4, wherein: the gas-water separator is characterized in that a branch connector (23) is arranged on the gas-water separator (21), a connector (24) is arranged on a connecting pipeline (9) between the vacuum isolation valve (12) and the air suction port (11) of the air pump (10), a branch pipeline (25) is connected between the connector (24) and the branch connector (23), and a second vacuum degree adjusting valve (26) is arranged on the branch pipeline (25).
6. A method for controlling a vacuum regulator of a steam turbine condenser, which is operated by using the vacuum regulator of a steam turbine condenser according to claim 1, comprising the steps of:
1) When the air pump (10) vacuumizes the condenser (7), the vacuum isolation valve (12) is opened, and the first vacuum degree adjusting valve (14) is closed;
2) When the vacuum degree in the condenser (7) needs to be reduced, the control device adjusts the first vacuum degree adjusting valve (14) to increase the opening degree of the first air inlet (15), and outside air enters the condenser (7) from the first air inlet (15) to reduce the vacuum degree in the condenser (7); the control device acquires the vacuum degree in the condenser (7) from the vacuum degree measuring instrument (13); when the vacuum degree in the condenser (7) is reduced to a first expected value, the control device stops adjusting the opening degree of a first air inlet (15) of a first vacuum degree adjusting valve (14);
3) When the vacuum degree in the condenser needs to be increased, the control device adjusts the first vacuum degree adjusting valve (14) to enable the opening degree of the first air inlet (15) to be reduced, and therefore the vacuum degree in the condenser (7) is increased; the control device acquires the vacuum degree in the condenser (7) from the vacuum degree measuring instrument (13); when the vacuum degree in the condenser (7) is increased to a second expected value, the control device stops adjusting the opening degree of the first air inlet (15) of the first vacuum degree adjusting valve (14).
7. The method of controlling a vacuum regulator for a steam turbine condenser according to claim 6, wherein a vacuum break valve (17) is connected to the condenser (7), the vacuum break valve (17) having a second inlet (19) communicating with the outside atmosphere, the second inlet (19) being larger than the first inlet (15); the method also comprises the following operation steps:
4) And when the vacuum degree in the condenser (7) needs to be broken, the vacuum breaking valve (17) is opened to enable the external atmosphere to enter the condenser (7) from the second air inlet (19).
8. The control method of the vacuum regulator of the steam turbine condenser according to claim 6, wherein the air outlet (20) of the air extractor (10) is connected with a moisture separator (21), and the moisture separator (21) has an air outlet (20) communicating with the outside atmosphere; a branch connector (23) is arranged on the gas-water separator (21), a connecting port (24) is arranged on a connecting pipeline (9) between the vacuum isolation valve (12) and the air suction port (11) of the air pump (10), a branch pipeline (25) is connected between the connecting port (24) and the branch connector (23), and a second vacuum degree regulating valve (26) is arranged on the branch pipeline (25); also comprises the following steps:
5) When the vacuum degree in the condenser (7) needs to be reduced, the second vacuum regulating valve can be regulated to conduct the branch pipeline (25).
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| CN201710295371.0A CN107036454B (en) | 2017-04-28 | 2017-04-28 | Vacuum adjusting device of steam turbine condenser and control method thereof |
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| JP7086821B2 (en) * | 2018-11-08 | 2022-06-20 | 株式会社東芝 | Direct contact type condenser |
| CN114812925B (en) * | 2022-05-05 | 2023-08-22 | 国电内蒙古东胜热电有限公司 | Power plant condenser vacuum recognition, calculation and detection device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS57207785A (en) * | 1981-06-17 | 1982-12-20 | Toshiba Corp | Apparatus for controlling internal pressure of condenser |
| JPS6390604A (en) * | 1986-10-03 | 1988-04-21 | Hitachi Ltd | Condenser cooling device |
| CN201600043U (en) * | 2010-01-21 | 2010-10-06 | 莱芜泰钢热电有限公司 | Condenser water level automatic control device |
| CN201982145U (en) * | 2011-04-01 | 2011-09-21 | 中国石油化工集团公司 | Shaft seal system of extraction condensing or condensing turbine |
| CN103940256B (en) * | 2014-04-11 | 2016-04-20 | 张曙光 | With pressure controlled plant condenser vapor injection vacuum pumping system |
| CN204877556U (en) * | 2015-08-26 | 2015-12-16 | 青岛捷能汽轮机集团股份有限公司 | Pressure stability device |
| CN206016877U (en) * | 2016-09-23 | 2017-03-15 | 湛江电力有限公司 | A kind of turbine shaft seal heater condensate water level precise control device |
| CN206129340U (en) * | 2016-09-27 | 2017-04-26 | 华北电力大学（保定） | Organic rankine cycle device |
| CN206772070U (en) * | 2017-04-28 | 2017-12-19 | 申能股份有限公司 | The vacuum regulator of turbine condenser |
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