CN110985141A - Steam turbine drainage control method and steam turbine drainage system - Google Patents
Steam turbine drainage control method and steam turbine drainage system Download PDFInfo
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- CN110985141A CN110985141A CN201911348699.XA CN201911348699A CN110985141A CN 110985141 A CN110985141 A CN 110985141A CN 201911348699 A CN201911348699 A CN 201911348699A CN 110985141 A CN110985141 A CN 110985141A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 238000004891 communication Methods 0.000 claims description 7
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 101100204059 Caenorhabditis elegans trap-2 gene Proteins 0.000 description 13
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 3
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/12—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/14—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to other specific conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/301—Pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/303—Temperature
Abstract
The invention relates to the technical field of steam turbines, in particular to a steam turbine drainage control method and a steam turbine drainage system. The steam turbine drainage control method comprises the following steps: firstly, acquiring pressure P and temperature T in a cylinder of a steam turbine in real time; next, acquiring the state of a medium in the cylinder through the pressure P and the temperature T in the cylinder; next, if the medium in the cylinder is in a partial liquid state, opening a drain valve communicated with the cylinder; next, if the medium in the cylinder is in a gaseous state, closing a drain valve communicated with the cylinder. Therefore, the steam turbine drainage control method can quickly and accurately acquire the state of the medium in the cylinder of the steam turbine, and timely control the opening or closing of the drainage valve according to the acquired result, so that the safe operation of the steam turbine is prevented from being influenced when the drainage valve is not opened or closed in time.
Description
Technical Field
The invention relates to the technical field of steam turbines, in particular to a steam turbine drainage control method and a steam turbine drainage system.
Background
In the operation process of the steam turbine, the medium state in a cylinder of the steam turbine needs to be monitored in real time, water accumulation in the cylinder is prevented, if the accumulated water is not discharged in time, a water hammer phenomenon is caused to damage blades and equipment, and even personal accidents are caused in serious cases; therefore, the medium state in the cylinder needs to be accurately judged, and the drain valve on the cylinder needs to be opened or closed in time; the drain valve is generally a manual, electric or pneumatic type drain control valve, but no matter what type of drain valve is, the medium state in the cylinder needs to be judged manually, and then the valve is opened or closed; when working condition mutation occurs in the operation process of the steam turbine or human judgment is wrong, the valve is not opened or closed timely, so that adverse consequences are generated, and the safe operation of the steam turbine is influenced.
Disclosure of Invention
The invention aims to provide a steam turbine drainage control method and a steam turbine drainage system, which are used for timely and accurately judging the state of a medium in a cylinder and controlling the opening or closing of a drainage valve.
The invention provides a steam turbine drainage control method, which comprises the following steps:
acquiring pressure P and temperature T in a cylinder of a steam turbine in real time;
acquiring the medium state in the cylinder through the pressure P and the temperature T in the cylinder;
if the medium in the cylinder is in a partial liquid state, opening a drain valve communicated with the cylinder;
and if the medium in the cylinder is in a gaseous state, closing a drain valve communicated with the cylinder.
Further, the step of judging the state of the medium in the cylinder through the pressure and the temperature in the cylinder specifically comprises the following steps:
acquiring the water vapor saturation temperature Tc under the pressure P;
comparing the temperature T with the saturation temperature Tc;
when T is more than Tc, controlling the trap to close;
and when T is less than or equal to Tc, controlling the drain valve to open.
Further, the step of judging the state of the medium in the cylinder through the pressure and the temperature in the cylinder specifically comprises the following steps:
obtaining the saturated temperature Tc of the water vapor under the pressure P, and comparing the temperature T with Tc + △ T;
when T is more than Tc + △ T, controlling the trap to close;
when Tc is more than T and less than or equal to Tc + △ T, controlling the trap to open;
△ t is the temperature margin.
Further, the △ t is 0.3-3 ℃.
The invention provides a steam turbine drainage system, which is used for draining water of a steam turbine and comprises a drainage valve and a control device; a pressure detection piece and a temperature detection piece are arranged in a cylinder of the steam turbine so as to obtain the pressure and the temperature in the cylinder; the pressure detection piece and the temperature detection piece are both electrically connected with the control device; the steam trap is communicated with the cylinder, and the medium in the cylinder can be discharged through the steam trap; the drain valve is electrically connected with the control device, and the control device can control the drain valve to be opened or closed.
Further, the pressure detection piece is a pressure sensor, and the temperature detection piece is a temperature sensor.
Further, the temperature measuring point of the temperature detecting piece is positioned in the cylinder and close to the communication position of the steam trap and the cylinder.
Furthermore, the number of the cylinders in the steam turbine is multiple, and each cylinder is internally provided with the pressure detection piece and the temperature detection piece which are electrically connected with the control device; the number of the drain valves is multiple, the drain valves correspond to the cylinders one by one, and the inlet ends of the drain valves are communicated with the corresponding cylinders.
Further, the device also comprises a liquid collector; and the outlet ends of the plurality of the drain valves are communicated with the liquid collector.
Further, the drain valve is located below the cylinder and communicated with the cylinder through a communicating pipe, and the communicating pipe is formed with a U-shaped elbow with an upward opening.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a steam turbine drainage control method, which comprises the following steps: firstly, acquiring pressure P and temperature T in a cylinder of a steam turbine in real time; next, acquiring the state of a medium in the cylinder through the pressure P and the temperature T in the cylinder; next, if the medium in the cylinder is in a partial liquid state, opening a drain valve communicated with the cylinder; next, if the medium in the cylinder is in a gaseous state, closing a drain valve communicated with the cylinder. Therefore, the steam turbine drainage control method can quickly and accurately acquire the state of the medium in the cylinder of the steam turbine, and timely control the opening or closing of the drainage valve according to the acquired result, so that the safe operation of the steam turbine is prevented from being influenced when the drainage valve is not opened or closed in time.
The invention also provides a steam turbine drainage system, which comprises a drainage valve and a control device, wherein the drainage valve is used for draining the steam cylinder of the steam turbine; the drain valve is connected with the cylinder of the steam turbine and is used for draining condensed water in the cylinder of the steam turbine; a pressure detection piece and a temperature detection piece are arranged in a cylinder of the steam turbine so as to obtain the pressure and the temperature in the cylinder; the steam trap, the pressure detection piece and the temperature detection piece uniform control device are electrically connected, the control device can receive real-time pressure and real-time temperature in the cylinder measured by the pressure detection piece and the temperature detection piece, quickly and accurately judge the medium state in the cylinder according to the steam turbine drainage control method, and timely and effectively open or close the steam trap, so that the safe operation of the steam turbine is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a steam turbine steam trap control method according to an embodiment of the present invention;
FIG. 2 is a flow chart of another steam turbine steam trap control method according to an embodiment of the present invention;
FIG. 3 is a flow chart of another steam turbine steam trap control method according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a steam turbine steam trap system according to an embodiment of the present invention.
Reference numerals:
1-steam turbine, 2-steam trap and 3-liquid collector.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A steam turbine steam trap control method and a steam turbine steam trap system according to some embodiments of the present application will be described below with reference to fig. 1 to 4.
The application provides a steam turbine drainage control method, as shown in fig. 1, comprising the following steps:
200, acquiring the medium state in the cylinder through the pressure P and the temperature T in the cylinder;
The steam turbine drainage control method provided by the application comprises the following steps:
firstly, install pressure measurement spare and temperature measurement spare on the cylinder of steam turbine, can carry out real-time supervision to the pressure in the cylinder through pressure measurement spare, can carry out real-time supervision to the temperature in the cylinder through temperature measurement spare to acquire real-time pressure value P and temperature value T in the cylinder through pressure measurement spare and temperature measurement spare. The pressure detection part and the temperature detection part are electrically connected with a control device of the steam turbine drainage system, and real-time pressure P and temperature T in a cylinder, which are measured by the pressure detection part and the temperature detection part, can be fed back to the control device.
Next, the control device receives the pressure P and the temperature T fed back by the pressure detection piece and the temperature detection piece, and the control device can judge what state the medium is under the pressure P and the temperature T according to the enthalpy entropy curve of the water vapor, for example, the state of the medium in the cylinder at the moment is a gas state or a gas-liquid coexisting state.
When the control device judges that the medium in the cylinder is in a gas-liquid coexisting state, the control device can control the drain valve to open, so that the liquid medium in the cylinder can be discharged in time;
when the control device judges that the medium in the cylinder is gaseous, the control device can control the drain valve to be closed, so that the gaseous medium is prevented from being discharged.
Therefore, by the steam turbine drainage control method, the state of the medium in the cylinder of the steam turbine can be quickly and accurately acquired through the control device, and the opening or closing of the drainage valve is timely controlled according to the acquired result, so that the situation that the safe operation of the steam turbine is influenced when the drainage valve is not opened or closed in time is avoided.
In one embodiment of the present application, preferably, as shown in fig. 2, the steam turbine steam trap control method includes the steps of:
101, acquiring pressure P and temperature T in a cylinder of a steam turbine in real time;
step 201a, when T is more than Tc, controlling the trap to close;
and step 201b, when T is less than or equal to Tc, controlling the drain valve to open.
In this embodiment, first, the control device receives the pressure P and the temperature T fed back by the pressure detecting member and the temperature detecting member; then, the control device obtains the saturation temperature Tc of the medium in the cylinder under the pressure P according to the enthalpy entropy curve of the water vapor, and compares the real-time temperature T in the cylinder measured by the temperature detection piece with the saturation temperature Tc;
when T is larger than Tc, the medium in the cylinder is in an overheated state, the control device can judge that only gaseous medium exists in the cylinder, and the control device controls the drain valve to close and keeps the state of the drain valve closed;
when the temperature T of the medium in the cylinder is reduced to T ═ Tc, the medium in the cylinder begins to be in a gas-liquid coexisting state, and at the moment, the control device controls the drain valve to be opened, and the condensed liquid medium is discharged in time, so that the safe operation of the steam turbine is ensured.
In one embodiment of the present application, preferably, as shown in fig. 3, the steam turbine steam trap control method includes the steps of:
102, acquiring pressure P and temperature T in a cylinder of a steam turbine in real time;
and step 202b, when Tc is less than or equal to Tc and is equal to or more than △ T, controlling the hydrophobic valve to open.
In the embodiment, firstly, the real-time pressure and the real-time temperature in the cylinder are detected through the pressure detection piece and the temperature detection piece to obtain the real-time pressure P and the real-time temperature T in the cylinder, and the detection result is fed back to the control device;
then, the control device obtains the saturation temperature Tc of the medium in the cylinder under the pressure P according to the enthalpy-entropy curve of the water vapor, adds a temperature margin △ T on the basis of the Tc to obtain a temperature value Tc + △ T slightly larger than the Tc, and then compares the real-time temperature T in the cylinder with the Tc and the Tc + △ T;
when the real-time temperature T in the cylinder is greater than Tc (T is greater than Tc), the medium in the cylinder is in an overheated state, and the control device can judge that only gaseous medium exists in the cylinder, so that the control device controls the trap to close and keeps the trap in a closed state;
when the real-time temperature T in the cylinder is reduced until the temperature is reduced to be between Tc and Tc + △ T, namely Tc is more than or equal to Tc and is less than or equal to Tc + △ T, the control device controls the drain valve to be opened, so that condensed liquid medium is discharged in time, and the safe operation of the steam turbine is guaranteed.
In one embodiment of the present application, △ t is preferably 0.3-3 ℃.
In the embodiment, because an operator finds that water is accumulated in the cylinder when the temperature T in the cylinder is not reduced to the saturation temperature Tc in the actual operation process, a temperature margin △ T is set, and when the temperature is reduced to the temperature interval Tc and Tc + △ T, the control device controls the opening of the drain valve, so that the water is drained to the cylinder in time, and the phenomenon that the safe operation of the steam turbine is influenced due to the fact that condensed water is not drained in time is prevented.
The application provides a steam turbine drainage system, which is used for draining a cylinder of a steam turbine 1, and comprises a drainage valve 2 and a control device as shown in figure 4; a pressure detection piece and a temperature detection piece are arranged in a cylinder of the steam turbine 1 so as to obtain the pressure and the temperature in the cylinder; the pressure detection piece and the temperature detection piece are both electrically connected with the control device; the steam trap 2 is communicated with a cylinder, and a medium in the cylinder can be discharged through the steam trap 2; the trap 2 is electrically connected to a control device, which is capable of controlling the trap 2 to open or close.
In this embodiment, the drain valve 2 is connected to the cylinder of the steam turbine 1, and is used for draining condensed water in the cylinder of the steam turbine 1; the steam trap 2 is electrically connected with a control device, the control device can judge the medium state in the cylinder and control the steam trap 2 to be opened or closed according to the judgment result, and the specific process is as follows:
firstly, a temperature detection piece and a pressure detection piece for detecting real-time temperature and real-time pressure in the cylinder are arranged in the cylinder, and the temperature detection piece and the pressure detection piece are both electrically connected with a control device, so that the measured real-time temperature and real-time pressure in the cylinder are fed back to the control device;
then, the control device judges the medium state in the cylinder according to the steam turbine drainage control method; when the control device determines that only gaseous media exist in the medium in the cylinder, the control device controls the drain valve 2 to be closed, and when the control device determines that the medium in the cylinder is gas-liquid two-phase coexistence, the control device controls the drain valve 2 to be opened; therefore, the medium state in the cylinder is rapidly and accurately judged by the control device according to the turbine drainage control method, and the drainage valve 2 is timely and effectively opened or closed, so that the safe operation of the turbine 1 is ensured.
In one embodiment of the present application, preferably, the pressure detecting member is a pressure sensor, and the temperature detecting member is a temperature sensor.
In this embodiment, the pressure detecting member is a pressure sensor, and the temperature detecting member is a temperature sensor; the pressure measuring end of the pressure sensor and the temperature measuring end of the temperature sensor can both extend into the cylinder, so that the real-time pressure in the cylinder can be measured through the pressure sensor, the real-time temperature in the cylinder can be measured through the temperature sensor, the pressure sensor and the temperature sensor have high measuring precision, and the accuracy of a measuring result can be guaranteed.
In one embodiment of the present application, the temperature sensing member preferably has a temperature sensing point located within the cylinder near the connection of the trap 2 to the cylinder.
In this embodiment, the trap 2 is mounted generally below the cylinder, and the connection of the trap 2 to the cylinder is at the lowest point of the cylinder, thereby facilitating drainage of accumulated water within the cylinder; meanwhile, a temperature gradient exists in the cylinder from bottom to top, the temperature at the lower position is lower, and the temperature at the upper position is higher; if the temperature measuring point is arranged above the cylinder, the temperature detected by the temperature measuring point is still within the range of the overheat temperature of the medium, but water accumulation can already occur below the cylinder; therefore, the temperature measuring point is extended to the lower part of the cylinder and is close to the communication part of the drain valve 2 and the cylinder, so that whether accumulated water exists in the cylinder can be rapidly and accurately judged according to the measured temperature, and the generated condensate water is discharged out of the cylinder in time.
In one embodiment of the present application, preferably, the steam turbine 1 has a plurality of cylinders, and each cylinder is provided therein with a pressure detecting member and a temperature detecting member electrically connected to the control device; the number of the steam trap valves 2 is multiple, the steam trap valves 2 correspond to the cylinders one by one, and the inlet ends of the steam trap valves 2 are communicated with the corresponding cylinders.
In this embodiment, a plurality of cylinders are provided in the steam turbine 1 according to the structure of the steam turbine 1, and as shown in fig. 4, the number of the cylinders is four; the medium state in each cylinder needs to be detected, and accumulated water in each cylinder is discharged in time; therefore, the drain valve 2 is installed below each cylinder, the pressure detection piece and the temperature detection piece which are electrically connected with the control device are correspondingly arranged in each cylinder, so that the cylinders can be independently monitored, and when any cylinder accumulates water, the control device can timely open the corresponding drain valve 2 to discharge the accumulated water in time.
In one embodiment of the present application, preferably, as shown in fig. 4, the steam turbine steam trap system further includes a liquid collector 3, and the outlet ends of the plurality of steam traps 2 are all communicated with the liquid collector 3.
In this embodiment, the steam turbine drainage system further includes a liquid collector 3, the inlet ends of the plurality of drainage valves 2 are respectively communicated with the corresponding cylinders, and the outlet ends of the plurality of drainage valves 2 extend to the liquid collector 3 and are communicated with the liquid collector 3, so that the condensed water in the cylinders is discharged into the liquid collector 3 through the drainage valves 2 for uniform collection.
In one embodiment of the present application, it is preferable that the trap 2 is located below the cylinder, and the trap 2 communicates with the cylinder through a communication pipe formed with a U-shaped elbow opening upward.
In this embodiment, the steam trap 2 is located below the corresponding cylinder and is communicated with the corresponding cylinder through a communication pipe, and the communication pipe has a section of U-shaped bent pipe with an upward opening, and a liquid seal can be formed through the U-shaped bent pipe to prevent the gaseous medium from being discharged.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A steam turbine drainage control method is characterized by comprising the following steps:
acquiring pressure P and temperature T in a cylinder of a steam turbine in real time;
acquiring the medium state in the cylinder through the pressure P and the temperature T in the cylinder;
if the medium in the cylinder is in a partial liquid state, opening a drain valve communicated with the cylinder;
and if the medium in the cylinder is in a gaseous state, closing a drain valve communicated with the cylinder.
2. The steam turbine steam trap control method of claim 1, wherein the step of determining the state of the medium in the cylinder by the pressure and temperature in the cylinder comprises the steps of:
acquiring the water vapor saturation temperature Tc under the pressure P;
comparing the temperature T with the saturation temperature Tc;
when T is more than Tc, controlling the trap to close;
and when T is less than or equal to Tc, controlling the drain valve to open.
3. The steam turbine steam trap control method of claim 1, wherein the step of determining the state of the medium in the cylinder by the pressure and temperature in the cylinder comprises the steps of:
obtaining the saturated temperature Tc of the water vapor under the pressure P, and comparing the temperature T with Tc + △ T;
when T is more than Tc + △ T, controlling the trap to close;
when Tc is more than T and less than or equal to Tc + △ T, controlling the trap to open;
△ t is the temperature margin.
4. The steam turbine.
5. A steam turbine drainage system is used for draining water of a steam turbine and is characterized by comprising a drainage valve and a control device;
a pressure detection piece and a temperature detection piece are arranged in a cylinder of the steam turbine so as to obtain the pressure and the temperature in the cylinder;
the pressure detection piece and the temperature detection piece are both electrically connected with the control device;
the steam trap is communicated with the cylinder, and the medium in the cylinder can be discharged through the steam trap;
the drain valve is electrically connected with the control device, and the control device can control the drain valve to be opened or closed.
6. The steam turbine drainage system of claim 5, wherein the pressure sensing member is a pressure sensor and the temperature sensing member is a temperature sensor.
7. The steam turbine trap system according to claim 5 wherein the temperature sensing member has a temperature sensing point located within said cylinder proximate the connection of said trap to said cylinder.
8. The steam turbine drainage system of claim 5, wherein the number of the cylinders in the steam turbine is plural, and the pressure detecting member and the temperature detecting member electrically connected to the control device are provided in each of the cylinders;
the number of the drain valves is multiple, the drain valves correspond to the cylinders one by one, and the inlet ends of the drain valves are communicated with the corresponding cylinders.
9. The steam turbine drainage system of claim 8, further comprising a liquid collector; and the outlet ends of the plurality of the drain valves are communicated with the liquid collector.
10. The steam turbine drainage system of claim 8, wherein the steam trap is positioned below the cylinder, the steam trap communicating with the cylinder through a communication pipe, the communication pipe being formed with an upwardly opening U-bend.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113483249A (en) * | 2021-07-01 | 2021-10-08 | 杭州英集动力科技有限公司 | Steam pipeline drainage system and method based on machine vision |
| CN114017661A (en) * | 2021-11-30 | 2022-02-08 | 中国华能集团清洁能源技术研究院有限公司 | Steam pipeline drainage method, system, equipment and medium capable of responding in advance |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204436484U (en) * | 2014-12-16 | 2015-07-01 | 河南省电力勘测设计院 | A kind of steam turbine water-inlet-proof protection steam line drain trap water-level control apparatus |
| CN105781629A (en) * | 2016-03-30 | 2016-07-20 | 国核电力规划设计研究院 | Control method of steam turbine steam pipeline drain valve of power station |
| JP2017072101A (en) * | 2015-10-08 | 2017-04-13 | 株式会社東芝 | Steam turbine system and its control method |
| CN110529722A (en) * | 2019-09-26 | 2019-12-03 | 中国电力工程顾问集团西北电力设计院有限公司 | Pipeline trapping method and system based on steam superheat parameter |
-
2019
- 2019-12-24 CN CN201911348699.XA patent/CN110985141A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204436484U (en) * | 2014-12-16 | 2015-07-01 | 河南省电力勘测设计院 | A kind of steam turbine water-inlet-proof protection steam line drain trap water-level control apparatus |
| JP2017072101A (en) * | 2015-10-08 | 2017-04-13 | 株式会社東芝 | Steam turbine system and its control method |
| CN105781629A (en) * | 2016-03-30 | 2016-07-20 | 国核电力规划设计研究院 | Control method of steam turbine steam pipeline drain valve of power station |
| CN110529722A (en) * | 2019-09-26 | 2019-12-03 | 中国电力工程顾问集团西北电力设计院有限公司 | Pipeline trapping method and system based on steam superheat parameter |
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