CN214944453U - Cooling water flow control system of gas turbine cooler - Google Patents
Cooling water flow control system of gas turbine cooler Download PDFInfo
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- CN214944453U CN214944453U CN202121125745.2U CN202121125745U CN214944453U CN 214944453 U CN214944453 U CN 214944453U CN 202121125745 U CN202121125745 U CN 202121125745U CN 214944453 U CN214944453 U CN 214944453U
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Abstract
The embodiment of the utility model provides a cooling water flow control system of a gas turbine cooler, which comprises a high-pressure water feed pump set, wherein a first high-pressure water feed pipe and a second high-pressure water feed pipe are led out from the water outlet end of the high-pressure water feed pump set; the water inlet end of the high-pressure economizer is connected with a first high-pressure water supply pipe; the water inlet end of the high-pressure steam pocket is communicated with the water outlet end of the high-pressure economizer; the water inlet end of the TCA cooler is communicated with a second high-pressure water supply pipe; the first inlet flowmeter is arranged on the second high-pressure water supply pipe; a loop of high-pressure steam drum pipeline communicated with the high-pressure steam drum is led out from the water outlet end of the TCA cooler; the height returning bag pneumatic valve is arranged on the height returning bag pipeline; the water outlet end of the TCA cooler leads out another path of condenser return pipeline connected with the condenser; the pneumatic valve of the condenser is arranged on the pipeline of the condenser; the input end of the PID controller is electrically connected with the first inlet flowmeter, and the output end of the PID controller is electrically connected with the pneumatic valve of the height returning pack and the pneumatic valve of the condenser respectively.
Description
Technical Field
The utility model relates to a gas turbine technical field particularly, relates to a cooling water flow control system of combustion engine turbo cooler.
Background
The gas turbine is an internal combustion type power machine which takes continuously flowing gas as a working medium and drives an impeller to rotate at a high speed to convert the energy of fuel into useful work, and is a rotary impeller type heat engine. The Cooling Air system (TCA) of the gas Turbine is used for Cooling the Turbine rotor and the moving blades, the Cooling Air is exhausted from the compressor and is cooled by the TCA and then supplied to the Turbine rotor and the moving blades, and the Cooling water of the TCA is supplied from a high-pressure feed water pump. The cooling effect of the TCA system has a very important role since it directly affects the safe operation of the gas turbine and the output of the gas turbine.
In the prior art, a high pressure return drum pneumatic valve in a high pressure return drum pipeline of a TCA cooler is controlled in an open loop mode, a CV value of the valve is calculated according to flow setting and pressure difference between the front side and the rear side of the TCA high pressure return drum pneumatic valve, and then the opening of the valve is calculated according to a CV curve preset in logic. Therefore, when the actual CV curve of the valve changes, the calculated valve opening degree and the set flow value have large deviation, so that the TCA flow requirement under the current operation condition of the gas turbine cannot be met, and even the unit safety may be threatened under serious conditions. In addition, at present, TCA return water and high-pressure economizer outlet water are mixed and then flow into the high-pressure steam pocket, and a water supply pipeline of the high-pressure economizer and the TCA water supply pipeline are mutually interfered and are not easy to control.
Disclosure of Invention
The present specification provides a cooling water flow control system for a turbine cooler of a combustion engine to overcome at least one technical problem in the prior art.
According to an embodiment of the present specification, there is provided a cooling water flow control system for a turbine cooler of a combustion engine, the cooling water flow control system including:
one end of the high-pressure water delivery main pipe is communicated with the low-pressure steam pocket;
the water inlet end of the high-pressure water feed pump set is communicated with the other end of the high-pressure water delivery main pipe;
the water outlet end of the high-pressure water feed pump set leads out a path of the first high-pressure water feed pipe;
the water inlet end of the high-pressure economizer is communicated with the first high-pressure water supply pipe;
the first high-pressure water supply pipe is provided with the water supply regulating valve;
the water inlet end of the high-pressure steam drum is communicated with the water outlet end of the high-pressure economizer;
the water outlet end of the high-pressure water feed pump set leads out the other path of the second high-pressure water feed pipe;
the water inlet end of the TCA cooler is communicated with the second high-pressure water supply pipe;
the water inlet adjusting valve is arranged on the second high-pressure water supply pipe;
a first inlet flow meter disposed on the second high pressure feed pipe between the inlet trim valve and the high pressure feed pump set;
a loop of the high-pressure steam drum is communicated with the water outlet end of the TCA cooler;
the height returning bag pneumatic valve is arranged on the height returning bag pipeline;
the water outlet end of the TCA cooler is led out of the other path of the condenser pipeline communicated with the condenser;
the condenser pneumatic valve is arranged on the condenser pipeline; the input end of the PID controller is electrically connected with the first inlet flowmeter; and the output end of the PID controller is respectively and electrically connected with the pneumatic valve of the height returning pack and the pneumatic valve of the condenser.
Preferably, the cooling water flow control system further comprises a second inlet flow meter; the second inlet flowmeter is arranged on the first high-pressure water supply pipe between the water feeding water adjusting valve and the high-pressure water supply pump set.
Further preferably, the second inlet flow meter is electrically connected with an input end of the PID controller; and the water feeding water regulating valve is electrically connected with the output end of the PID controller.
Preferably, the high-pressure water feed pump group comprises a plurality of groups of first manual valves, electric valves, high-pressure water feed pumps and second manual valves which are connected in sequence; the second manual valve is arranged at the water inlet end of the high-pressure water feed pump; the first manual valve and the electric valve are arranged at the water outlet end of the high-pressure water feeding pump.
Further preferably, the high-pressure feed pump unit further comprises a check valve; the check valve is arranged between the high-pressure water supply pump and the electric valve.
Further preferably, the high-pressure feed pump group further comprises a pressure reducing valve; the pressure reducing valve is arranged between the high-pressure water feeding pump and the second manual valve.
Preferably, the cooling water flow control system further comprises a first differential pressure transmitter, and the first differential pressure transmitter is connected with the upper water regulating valve in parallel.
Preferably, the cooling water flow control system further comprises a second differential pressure transmitter, and the second differential pressure transmitter is connected with the turn-up pneumatic valve in parallel.
Further preferably, the first differential pressure transmitter and the second differential pressure transmitter are respectively electrically connected with the PID controller.
Preferably, the water feeding adjusting valve is an electric adjusting valve; the water inlet adjusting valve is a pneumatic adjusting valve.
By applying the embodiment of the specification, the heightening packet pneumatic valve and the condensing unit pneumatic valve corresponding to the TCA cooler are changed into PID closed-loop control, the actual cooling water flow of the TCA cooler is monitored in real time through the first inlet flowmeter at the water inlet end of the TCA cooler, and the PID controller is used for carrying out comparison operation according to the actual cooling water flow value of the TCA cooler and a set value to obtain the valve opening, so that the accurate adjustment of the cooling water flow of the TCA cooler is realized, the problem that the deviation between the calculated valve opening and the set flow value in the open-loop control process in the prior art is large is effectively solved, the flow demand of the TCA cooler can be guaranteed, and the operation safety of the unit is improved.
In addition, directly leading-in high-pressure steam pocket with TCA cooler return water for mutual independence between the water supply line of high-pressure economizer and TCA cooler, mutual noninterference, control is changeed and is realized, and it is more convenient to adjust.
The innovation points of the embodiment of the specification comprise:
1. in the embodiment, the PID controller is utilized, and the cooling water flow of the TCA cooler is controlled in a PID closed-loop regulation mode in the whole course, so that the flow of the TCA cooler is accurately regulated, and the problem of large deviation between the calculated valve opening and the set flow value in the open-loop control process in the prior art is effectively solved.
2. In this embodiment, the accessible is controlled back to high package pneumatic valve and the aperture of condenser pneumatic valve, guarantee TCA cooler supply flow, the condition that the switching in-process TCA cooler supply flow is low appears having been avoided to the at utmost, and control back to high package pneumatic valve simultaneously through the PID controller, the condenser pneumatic valve returns, realize back to high package pneumatic valve, back condenser pneumatic valve is automatic regulation and control not simultaneously between the two, it is low to prevent to lead to TCA cooler supply flow because PID controller excessively adjusts, trigger back the condition appearance that condenser pneumatic valve frequently opened soon, the security and the equipment life of unit have been improved.
3. In the embodiment, the return water of the TCA cooler is directly led into the high-pressure steam drum, so that the water supply pipelines of the high-pressure economizer and the TCA cooler are independent from each other and do not interfere with each other, and the control is easier to realize.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure 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, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a cooling water flow control system of a turbine cooler of a combustion engine according to an embodiment of the present disclosure;
FIG. 2 is a block diagram of a cooling water flow control system for a turbine cooler of a combustion engine according to an embodiment of the present disclosure;
description of reference numerals: 1 is a high-pressure water delivery main pipe, 2 is a first high-pressure water supply pipe, 3 is a high-pressure economizer, 4 is a water feeding regulating valve, 5 is a high-pressure steam drum, 6 is a second high-pressure water supply pipe, 7 is a TCA cooler, 8 is a water inlet regulating valve, 9 is a first inlet flowmeter, 10 is a high-pressure return drum pipeline, 11 is a high-pressure return drum pneumatic valve, 12 is a condenser pipeline, 13 is a condenser pneumatic valve, 14 is a PID controller, 15 is a second inlet flowmeter, 16 is a first manual valve, 17 is an electric valve, 18 is a high-pressure water supply pump, 19 is a second manual valve, 20 is a check valve, 21 is a pressure reducing valve, 22 is a first differential pressure transmitter, 23 is a second differential pressure transmitter, and 24 is a condenser.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present specification and the drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The embodiment of the specification discloses a cooling water flow control system of a turbine cooler of a combustion engine. The following are detailed below.
Fig. 1 and 2 illustrate a cooling water flow control system of a turbine cooler of a combustion engine according to an embodiment of the present disclosure. As shown in fig. 1 and 2, the cooling water flow control system includes a high-pressure water delivery main pipe 1, a high-pressure water feed pump group, a first high-pressure water feed pipe 2, a high-pressure economizer 3, a water feed regulating valve 4, a high-pressure steam drum 5, a second high-pressure water feed pipe 6, a TCA cooler 7, a water inlet regulating valve 8, a first inlet flow meter 9, a high return drum pipeline 10, a high return drum pneumatic valve 11, a condenser return pipeline 12, a condenser return pneumatic valve 13, a PID controller 14, a second inlet flow meter 15, a first differential pressure transmitter 22, and a second differential pressure transmitter 23.
In the embodiment of the present specification, the cooling water flow control system is supplied with cooling water by a high-pressure water feed pump set, specifically, the water inlet end of the high-pressure water feed pump set is communicated with one end of a high-pressure water delivery main pipe 1, and the other end of the high-pressure water delivery main pipe 1 is communicated with a low-pressure steam drum (not shown in the figure). Under the action of the high-pressure water supply pump set, the low-pressure steam drum effluent is conveyed through the high-pressure water conveying main pipe 1 to supply water sources for downstream equipment.
In a specific embodiment, the high-pressure water feed pump group comprises a plurality of groups of first manual valves 16, electric valves 17, a high-pressure water feed pump 18 and second manual valves 19 which are connected in sequence; the second manual valve 19 is arranged at the water inlet end of the high-pressure water feed pump 18; the first manual valve 16 and the electric valve 17 are arranged at the water outlet end of the high-pressure water feeding pump 18. Further, the high-pressure water feed pump group further comprises a check valve 20 and a pressure reducing valve 21, wherein the check valve 20 is arranged between the high-pressure water feed pump 18 and the electric valve 17, and the pressure reducing valve 21 is arranged between the high-pressure water feed pump 18 and the second manual valve 19.
Preferably, the high pressure feed pump assembly is provided with two sets of high pressure feed pumps 18. The water inlet end of each high-pressure water feeding pump 18 is provided with a second manual valve 19 and a pressure reducing valve 21, the second manual valve 19 is used for manually controlling the communication or the closing between the high-pressure water feeding pump 18 and the low-pressure steam drum, the water inlet amount of the high-pressure water feeding pump 18 is manually controlled, and the pressure reducing valve 21 is used for reducing the pressure of the water coming from the high-pressure water feeding pump 18 so as to meet the water pressure requirements of the high-pressure water feeding pump 18 and the downstream equipment thereof. In addition, a first manual valve 16, an electric valve 17 and a check valve 20 are arranged at the water outlet end of each high-pressure water feed pump 18, the check valve 20 is used for preventing water from flowing backwards, the operation safety of the unit is improved, the electric valve 17 is used for automatically controlling the connection or disconnection between the high-pressure water feed pump 18 and downstream equipment, the first manual valve 16 is used for manually controlling the connection or disconnection between the high-pressure water feed pump 18 and the downstream equipment, and the double control of the water outlet quantity of the high-pressure water feed pump 18 is arranged, so that the control is easier to realize, and the control is safer and more reliable.
And the water outlet end of the high-pressure water feed pump set is led out to form two paths, one path is a first high-pressure water feed pipe 2 communicated with the high-pressure economizer 3, and the other path is a second high-pressure water feed pipe 6 communicated with a TCA cooler 7.
Specifically, a first high-pressure water supply pipe 2 is led out from the water outlet end of the high-pressure water supply pump set, the first high-pressure water supply pipe 2 is communicated with the water inlet end of the high-pressure economizer 3, and the high-pressure water supply pump set conveys water to the high-pressure economizer 3 through the first high-pressure water supply pipe 2. In order to control the water feeding amount of the high-pressure economizer 3, a water feeding adjusting valve 4 is arranged on the first high-pressure water feeding pipe 2, the water feeding amount of the high-pressure economizer 3 is controlled by adjusting the opening degree of the water feeding adjusting valve 4, and the water feeding adjusting valve 4 is preferably an electric adjusting valve, so that the automatic control of the water feeding amount of the high-pressure economizer 3 is realized. In addition, the first differential pressure transmitter 22 is connected in parallel at the upper water regulating valve 4, and the cooling water flow control system monitors the actual water amount of the high-pressure economizer 3 in real time by using the first differential pressure transmitter 22. Further, a second inlet flowmeter 15 is further arranged on the first high-pressure water supply pipe 2 between the water feeding water regulating valve 4 and the high-pressure water supply pump set, and the second inlet flowmeter 15 is used for monitoring the actual water flow of the high-pressure economizer 3 in real time, so that the water flow of the high-pressure economizer 3 can be better controlled.
And the water outlet end of the high-pressure water feed pump unit leads out another path of second high-pressure water feed pipe 6, the second high-pressure water feed pipe 6 is communicated with the water inlet end of the TCA cooler 7, and the high-pressure water feed pump unit supplies a cooling water source for the TCA cooler 7 through the second high-pressure water feed pipe 6. In order to control the water inlet of the TCA cooler 7, a water inlet adjusting valve 8 is arranged on the second high-pressure water supply pipe 6, and the communication or the disconnection between the TCA cooler 7 and the high-pressure water supply pump set is controlled by the water inlet adjusting valve 8, wherein the water inlet adjusting valve 8 is preferably a pneumatic adjusting valve, the water inlet of the TCA cooler 7 from the high-pressure water supply pump set is automatically controlled, the adjusting ratio is large, the sealing effect is good, and the adjusting performance is sensitive.
In addition, in order to monitor the actual cooling water flow of the TCA cooler 7 in real time, a first inlet flowmeter 9 is further arranged on the second high-pressure water feed pipe 6 between the water inlet regulating valve 8 and the high-pressure water feed pump set, and the actual cooling water flow value of the TCA cooler 7 is obtained by using the first inlet flowmeter 9, so that the cooling water flow of the TCA cooler 7 can be regulated and controlled according to the actual cooling water flow value and the set value of the TCA cooler 7.
The water outlet end of the TCA cooler 7 is led out two paths, one path is a high return drum pipeline 10 of a high pressure return drum 5, and the other path is a condenser pipeline 12 of a condenser 24.
Specifically, one end of the high-pressure return drum pipeline 10 is communicated with the water outlet end of the TCA cooler 7, and the other end is communicated with the high-pressure steam drum 5. The return water of the TCA cooler 7 is directly guided into the high-pressure steam drum 5 through the return water drum pipeline 10, in addition, the water inlet end of the high-pressure steam drum 5 is communicated with the water outlet end of the high-pressure economizer 3, namely, the return water of the high-pressure economizer 3 and the return water of the TCA cooler 7 are respectively and directly guided into the high-pressure steam drum 5, the water supply pipelines between the high-pressure economizer 3 and the TCA cooler 7 are independent from each other and do not interfere with each other, the control is easier to realize, and the adjustment is simpler and more convenient.
One end of the condenser return pipeline 12 is communicated with the condenser 24, the other end of the condenser return pipeline is communicated with the water outlet end of the TCA cooler 7, and the TCA cooler 7 is returned water and conveyed to the condenser 24 through the condenser return pipeline 12.
In the present embodiment, in order to control the cooling water flow rate of the TCA cooler 7, the cooling water flow rate control system is further provided with a turn-up solenoid valve 11 and a condenser solenoid valve 13. Wherein, the pneumatic valve 11 of the altitude bag is set up on the pipeline 10 of the altitude bag, utilizes the pneumatic valve 11 of the altitude bag to regulate and control the water flow that TCA cooler 7 carried to high-pressure steam pocket 5, and further, connects in parallel second differential pressure transmitter 23 in pneumatic valve 11 department of the altitude bag, utilizes second differential pressure transmitter 23 real-time supervision altitude bag pneumatic valve 11 around differential pressure. The condenser pneumatic valve 13 is arranged on the condenser pipeline 12, and the flow rate of water conveyed to the condenser 24 by the TCA cooler 7 is regulated and controlled by the condenser pneumatic valve 13.
The cooling water flow control system is provided with a PID controller 14, and PID closed-loop automatic regulation and control of the valve are realized through the PID controller 14. Specifically, an input end of the PID controller 14 is electrically connected to the first inlet flow meter 9, and an output end of the PID controller 14 is electrically connected to the back-up solenoid operated valve 11 and the back-condenser operated valve 13, respectively. The method comprises the steps that a first inlet flowmeter 9 monitors the actual cooling water flow of a TCA cooler in real time, the detected actual cooling water flow value is sent to a PID controller 14, when a pneumatic valve 11 of a loop packet performs PID automatic closed-loop regulation and control, the PID controller 14 compares the actual cooling water flow value of the TCA cooler with a set flow value of the pneumatic valve of the loop packet set by a system according to the actual cooling water flow value of the TCA cooler to obtain a comparison result, further calculates according to the comparison result to obtain the valve opening degree of the pneumatic valve 11 of the loop packet, communicates the calculated valve opening degree to a control end of the pneumatic valve 11 of the loop packet, and then adjusts the opening degree of the pneumatic valve 11 of the loop packet to control the cooling water flow of the TCA cooler 7; similarly, when the condenser pneumatic valve 13 performs the PID automatic closed-loop control, the PID controller 14 compares the actual cooling water flow value of the TCA cooler with the set flow value of the condenser pneumatic valve set by the system to obtain a comparison result, and further calculates the valve opening of the condenser pneumatic valve 13 according to the comparison result, and communicates the calculated valve opening to the control end of the condenser pneumatic valve 13, thereby adjusting the opening of the condenser pneumatic valve 13, and controlling the cooling water flow of the TCA cooler 7.
This cooling water flow control system is through setting up the PID controller for the cooling water flow control of TCA cooler all can adopt PID closed loop control mode in the whole journey, realizes the accurate regulation of TCA cooler flow, has effectively solved the big problem of valve opening and the flow value deviation of settlement that calculates among the prior art in the open loop control process.
In a specific implementation, the second inlet flow meter 15 is electrically connected to an input of the PID controller 14, and the feedwater regulating valve 4 is electrically connected to an output of the PID controller 14. The second inlet flowmeter 15 monitors the actual water quantity of the high-pressure economizer 3 in real time, and sends the detected actual water quantity value to the PID controller 14, the PID controller 14 compares the received actual water quantity value of the high-pressure economizer 3 with a system preset value to obtain a comparison result, and calculates the valve opening of the water-feeding regulating valve 4 according to the comparison result, so that the water-feeding regulating valve 4 is automatically adjusted to control the water-feeding quantity of the high-pressure economizer 3.
In the embodiment of the present disclosure, the comparison result and the valve opening of each corresponding valve are in a certain proportional relationship, and the PID controller 14 can calculate the corresponding valve opening according to the comparison result.
In another specific implementation process, the first differential pressure transmitter 22 and the second differential pressure transmitter 23 are respectively electrically connected with the PID controller 14, the first differential pressure transmitter 22 and the second differential pressure transmitter 23 respectively monitor the front and back differential pressures of the water feeding regulating valve 4 and the back high packet pneumatic valve 11 in real time, and send detected values to the PID controller 14, and the PID controller 14 can regulate and control the valve opening degrees of the water feeding regulating valve 4 and the back high packet pneumatic valve 11 according to the received differential pressure values, so as to control the water feeding amount of the high-pressure economizer 3 and the cooling water flow rate of the TCA cooler 7.
The connection relationship between the components of the cooling water flow control system of the combustion engine turbo cooler provided in the present embodiment and the components is described above, and the operation principle of the cooling water flow control system of the combustion engine turbo cooler is described in detail below with reference to fig. 1 to 2.
In a specific embodiment, when the load is less than 120WM after the combustion engine is started, the condenser pneumatic valve 13 performs PID automatic closed-loop adjustment on the cooling water flow rate of the TCA cooler 7, specifically, the first inlet flowmeter 9 measures the actual cooling water flow rate of the TCA cooler 7, compares the measured actual cooling water flow rate with the set flow rate value of the condenser pneumatic valve set by the system, calculates the difference value, and then calculates an opening command of the condenser pneumatic valve 13 through the PID controller 14, and the opening command is communicated to the controller of the condenser pneumatic valve 13 to realize the opening and closing operation of the air-operated valve so as to enable the air-operated valve to reach the required opening state. The trap valve 11 remains in the-5% closed state until the engine load 120 WM.
When the load of the combustion engine is increased to be more than 120WM, the air-operated valve 11 of the turn-up valve is gradually opened to the minimum opening degree of 45 percent at the rate of 30 percent per minute, and the air-operated valve is automatically switched in after 5 seconds to carry out PID automatic closed loop regulation. Specifically, the first inlet flow meter 9 measures the actual cooling water flow of the TCA cooler 7, compares the actual cooling water flow with a set flow value of the loop-up packet pneumatic valve set by the system, calculates a difference value, and then calculates an opening command of the loop-up packet pneumatic valve 11 through the PID controller 14, and the opening command is communicated to the controller of the loop-up packet pneumatic valve 11 to realize the opening and closing action of the adjusting valve, so that the loop-up packet pneumatic valve 11 reaches a required opening state. Meanwhile, when the back-up solenoid operated valve 11 is opened to 45%, the back-up condenser operated valve 13 is gradually closed at a rate of 10% per minute until it is fully closed to-2%, and thereafter, the back-up condenser operated valve 13 is always in a back-up closed state as the load of the engine increases.
Therefore, by limiting the minimum opening of the back-up drum pneumatic valve 11, the back-condenser pneumatic valve 13 is arranged to be gradually closed after the back-up drum pneumatic valve 11 is opened to the minimum opening, and the condition that the supply flow of the TCA cooler is low in the switching process is avoided to the maximum extent.
When an accident happens, the flow of the TCA cooler 7 is low, when the actual value of the cooling water flow of the TCA cooler 7 is lower than 70% of the set flow value of the pneumatic valve of the altitude packet, the pneumatic valve 11 of the altitude packet is cut off automatically and the current valve opening is kept, meanwhile, the pneumatic valve 13 of the condenser is opened quickly to 60%, and after 5 seconds of delay, the cooling water flow of the TCA cooler 7 is subjected to PID (proportion integration differentiation) automatic closed-loop adjustment by the pneumatic valve 13 of the condenser. The automatic cut-off of the top-hat pneumatic valve 11 and the adjustment of the TCA flow by the condenser pneumatic valve 13 prevent both valves from adjusting simultaneously, causing unnecessary mutual disturbances.
In this embodiment, after the load of the gas turbine is greater than 120WM, the feedback solenoid operated valve 11 performs PID automatic closed-loop adjustment according to the cooling water flow of the TCA cooler 7, and simultaneously limits the minimum opening degree of 45% of the feedback solenoid operated valve 11, so as to prevent the problem that the TCA flow frequently triggers the feedback solenoid operated valve 13 to open quickly when the PID automatic adjustment is not good, thereby improving the service life and the operation safety of the unit equipment.
To sum up, the present specification discloses a cooling water flow control system of a combustion engine turbine cooler, the pneumatic valves of the turn-up packet and the pneumatic valves of the return condenser corresponding to the TCA cooler are changed into PID closed-loop control, the actual cooling water flow of the TCA cooler is monitored in real time through the first inlet flow meter at the water inlet end of the TCA cooler, and the PID controller performs comparison operation according to the actual value and the set value of the cooling water flow of the TCA cooler to obtain the valve opening, thereby realizing the accurate regulation of the cooling water flow of the TCA cooler, effectively solving the problem of large deviation between the calculated valve opening and the set flow value in the open-loop control process in the prior art, ensuring the flow demand of the TCA cooler, and improving the operation safety of the unit.
In addition, directly leading-in high-pressure steam pocket with TCA cooler return water for mutual independence between the water supply line of high-pressure economizer and TCA cooler, mutual noninterference, control is changeed and is realized, and it is more convenient to adjust.
Those of ordinary skill in the art will understand that: the figures are schematic representations of one embodiment, and the blocks or processes in the figures are not necessarily required to practice the present invention.
Those of ordinary skill in the art will understand that: modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, or may be located in one or more devices different from the embodiments with corresponding changes. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.
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 it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.
Claims (10)
1. A cooling water flow control system for a turbine cooler of a combustion engine, said cooling water flow control system comprising:
one end of the high-pressure water delivery main pipe is communicated with the low-pressure steam pocket;
the water inlet end of the high-pressure water feed pump set is communicated with the other end of the high-pressure water delivery main pipe;
the water outlet end of the high-pressure water feed pump set leads out a path of the first high-pressure water feed pipe;
the water inlet end of the high-pressure economizer is communicated with the first high-pressure water supply pipe;
the first high-pressure water supply pipe is provided with the water supply regulating valve;
the water inlet end of the high-pressure steam drum is communicated with the water outlet end of the high-pressure economizer;
the water outlet end of the high-pressure water feed pump set leads out the other path of the second high-pressure water feed pipe;
the water inlet end of the TCA cooler is communicated with the second high-pressure water supply pipe;
the water inlet adjusting valve is arranged on the second high-pressure water supply pipe;
a first inlet flow meter disposed on the second high pressure feed pipe between the inlet trim valve and the high pressure feed pump set;
a loop of the high-pressure steam drum is communicated with the water outlet end of the TCA cooler;
the height returning bag pneumatic valve is arranged on the height returning bag pipeline;
the water outlet end of the TCA cooler is led out of the other path of the condenser pipeline communicated with the condenser;
the condenser pneumatic valve is arranged on the condenser pipeline;
the input end of the PID controller is electrically connected with the first inlet flowmeter; and the output end of the PID controller is respectively and electrically connected with the pneumatic valve of the height returning pack and the pneumatic valve of the condenser.
2. The cooling water flow control system for a gas turbine cooler of claim 1 further comprising a second inlet flow meter; the second inlet flowmeter is arranged on the first high-pressure water supply pipe between the water feeding water adjusting valve and the high-pressure water supply pump set.
3. The cooling water flow control system for a gas turbine cooler according to claim 2 wherein the second inlet flow meter is electrically connected to an input of the PID controller; and the water feeding water regulating valve is electrically connected with the output end of the PID controller.
4. The cooling water flow control system for the turbine cooler of the combustion engine according to claim 1, wherein the high-pressure feed water pump set comprises a plurality of groups of a first manual valve, an electric valve, a high-pressure feed water pump and a second manual valve which are sequentially connected; the second manual valve is arranged at the water inlet end of the high-pressure water feed pump; the first manual valve and the electric valve are arranged at the water outlet end of the high-pressure water feeding pump.
5. The cooling water flow control system for a gas turbine cooler according to claim 4, wherein the high pressure feed pump unit further comprises a check valve; the check valve is arranged between the high-pressure water supply pump and the electric valve.
6. The cooling water flow control system for a gas turbine cooler according to claim 4, wherein the high pressure feed pump unit further includes a pressure reducing valve; the pressure reducing valve is arranged between the high-pressure water feeding pump and the second manual valve.
7. The cooling water flow control system for a gas turbine cooler of claim 1 further comprising a first differential pressure transmitter connected in parallel with the feedwater modulating valve.
8. The cooling water flow control system for a gas turbine cooler of claim 7 further comprising a second differential pressure transmitter in parallel with said turn-up solenoid valve.
9. The cooling water flow control system for a turbine cooler of a combustion engine as set forth in claim 8, wherein said first differential pressure transducer and said second differential pressure transducer are electrically connected to said PID controller, respectively.
10. The cooling water flow control system for a gas turbine cooler according to claim 1, wherein said feedwater regulating valve is an electric regulating valve; the water inlet adjusting valve is a pneumatic adjusting valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121125745.2U CN214944453U (en) | 2021-05-25 | 2021-05-25 | Cooling water flow control system of gas turbine cooler |
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| CN115559816A (en) * | 2022-09-05 | 2023-01-03 | 广东华电清远能源有限公司 | Control method and system for water-cooled turbine rotor cooling air system of M701F4 combustion engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115559816A (en) * | 2022-09-05 | 2023-01-03 | 广东华电清远能源有限公司 | Control method and system for water-cooled turbine rotor cooling air system of M701F4 combustion engine |
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