CN114754599A - Heat exchange system and method of surface type indirect air cooling system - Google Patents
Heat exchange system and method of surface type indirect air cooling system Download PDFInfo
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- CN114754599A CN114754599A CN202210434095.2A CN202210434095A CN114754599A CN 114754599 A CN114754599 A CN 114754599A CN 202210434095 A CN202210434095 A CN 202210434095A CN 114754599 A CN114754599 A CN 114754599A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B5/00—Condensers employing a combination of the methods covered by main groups F28B1/00 and F28B3/00; Other condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B11/00—Controlling arrangements with features specially adapted for condensers
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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
- F28B9/04—Auxiliary systems, arrangements, or devices for feeding, collecting, and storing cooling water or other cooling liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F17/00—Removing ice or water from heat-exchange apparatus
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Abstract
The application provides a heat exchange system and a method of a surface type indirect air cooling system, wherein the heat exchange system comprises a heat exchange device and a circulating water control device; the heat exchange device is used for replacing heat energy in the circulating water supplied by the circulating water control device through a plurality of groups of first water supply and return pipelines; the circulating water control device comprises a circulating water supply unit and a water quantity control unit; the circulating water supply unit is respectively connected with a water supply port and a water return port of the first water supply and return pipeline and is used for supplying circulating water heated by exhaust steam of a steam turbine at the condenser to the first water supply and return pipeline; and supplying the circulating water after the heat energy is replaced by the first water supply and return pipeline to a condenser to cool the exhaust steam of the steam turbine; the water quantity control unit is used for controlling the circulating water supply unit to change the circulating water flow direction and the circulating water quantity in the first water supply and return pipeline according to the received control instruction.
Description
Technical Field
The application relates to the field of thermal power application, in particular to a heat exchange system and a heat exchange method of a surface type indirect air cooling system.
Background
The surface type indirect air cooling system has the advantages of water saving, energy saving, wind resistance, small influence on a vacuum system and the like, and is widely applied to a plurality of thermal power generating units, but when the environmental temperature is low, circulating water in a heat exchanger finned tube of the indirect air cooling system is easy to freeze to cause finned tube bursting, and in serious cases, water circulation interruption, shutdown of the indirect air cooling system and the units are caused. And the repair technology of the frozen damage of the finned tubes of the heat exchanger has high difficulty, large workload and long time, and causes great loss, so the solution of the anti-freezing problem of the heat exchanger of the indirect air cooling system is very important.
Under the same low temperature environment, the smaller the flow speed of the circulating water in the heat exchanger tube bundle is, the easier the circulating water in the heat exchanger tube bundle is to freeze, so that the heat exchange tube is cracked, and the whole indirect air cooling tower comprises a plurality of heat exchange sectors (heat exchange units), each heat exchange unit comprises a plurality of heat exchange triangles, and the distribution of the flow in each heat exchanger is uneven. According to hydrodynamics, in the same heat exchange sector (heat exchange unit), the flow of the heat exchanger close to the water supply and return pipeline is larger than that of the heat exchanger far away from the water supply and return pipeline. Therefore, for the same heat exchange sector, the probability of icing and bursting of the heat exchangers in the heat exchange triangles is usually determined by the heat exchanger with the lowest flow, namely the heat exchanger with the lowest flow plays a 'short plate effect' of the wooden barrel, the frost resistance of the whole heat exchange sector (heat exchange unit) is reduced due to uneven flow distribution, one heat exchanger is iced and flawed, the whole heat exchange unit needs to be stopped for maintenance, and the safe and stable operation of a unit is influenced. Meanwhile, as the effect of countercurrent heat exchange is better than that of concurrent heat exchange, the flow of circulating water in the existing heat exchanger is usually arranged in an integral countercurrent mode; however, when the environmental temperature is low, the circulating water low-temperature area and the cold air low-temperature area are overlapped in a countercurrent heat exchange mode, so that the heat exchanger tube is easy to freeze.
Disclosure of Invention
The application aims to provide a heat exchange system and a heat exchange method of a surface type indirect air cooling system, which solve the problem of icing of a heat exchanger tube under the premise of ensuring the stable operation of the heat exchanger.
In order to achieve the purpose, the heat exchange system of the surface type indirect air cooling system specifically comprises a heat exchange device and a circulating water control device; the heat exchange device is used for replacing heat energy in the circulating water supplied by the circulating water control device through a plurality of groups of first water supply and return pipelines; the circulating water control device comprises a circulating water supply unit and a water quantity control unit; the circulating water supply unit is respectively connected with a water supply port and a water return port of the first water supply and return pipeline and is used for supplying circulating water heated by exhaust steam of a steam turbine at the condenser to the first water supply and return pipeline; and the circulating water after the heat energy is replaced by the first water supply and return pipeline is provided to a condenser to cool the exhaust steam of the steam turbine; the water quantity control unit is used for controlling the circulating water supply unit to change the circulating water flow direction and the circulating water quantity in the first water supply and return pipeline according to the received control instruction.
In an embodiment of the present application, optionally, the heat exchanging device includes a plurality of heat exchanging sectors; the heat exchange sector combination forms a hollow cylindrical heat exchange structure sleeved outside the indirect air cooling tower; the heat exchange sector comprises a heat exchange panel, and the first water supply and return pipeline is arranged in the heat exchange panel.
In an embodiment of the present application, optionally, the heat exchange sector includes a plurality of heat exchange triangles, and each heat exchange triangle includes two heat exchange panels and a louver member; the shutter member comprises a shutter blowing panel and a wind control unit; the louver air blowing panel and the heat exchange panel form a hollow triangular prism structure, and the first water supply and return pipeline is arranged on the heat exchange panel according to a preset track; and the air volume control unit is used for controlling the cold air intake volume provided by the shutter blowing panel to the heat exchange panel according to the received control instruction.
In an embodiment of the present application, optionally, the circulating water control apparatus further includes a distribution pipe, and the circulating water supply unit is connected to the water supply port and the water return port of the first water supply and return pipe through the distribution pipe, respectively.
In an embodiment of the present application, optionally, the distribution pipeline is connected to a water feeding port or a water returning port of the first water feeding and returning pipeline through a throttling element; the resistance coefficient of the throttling element is set according to the distance between the water feeding port of the first water feeding and returning pipeline and the water feeding port of the second water feeding and returning pipeline of the circulating water supply unit; or the distance between the water return port of the first water supply and return pipeline and the water return port of the second water supply and return pipeline is set.
In an embodiment of the present application, optionally, the circulating water supply unit includes a second water supply and return pipeline, a first electric valve, a second electric valve, a third electric valve, and a fourth electric valve; the second water supply and return pipeline comprises a first pipeline, a second pipeline, a first associated branch pipe and a second associated branch pipe; one end of the first pipeline and one end of the second pipeline are connected with a water supply port and a water return port of the first water supply and return pipeline through the distribution pipeline, and the other end of the first pipeline and the other end of the second pipeline are connected with a water supply port and a water return port of the condenser; one end of the first associated branch is connected with the first pipeline, and the other end of the first associated branch is connected with the second pipeline and is positioned between the fourth electric valve and the intersection point of the second pipeline and the distribution pipeline; one end of the second associated branch pipe is connected with the second pipeline, and the other end of the second associated branch pipe is connected with the first pipeline and is positioned between the first electric valve and the intersection point of the first pipeline and the distribution pipeline; the first electric valve is arranged on the first pipeline and is positioned between the intersection point of the first associated branch pipe and the first pipeline and the intersection point of the first pipeline and the distribution pipeline; the fourth electric valve is arranged on the second pipeline and is positioned between the intersection point of the second associated branch pipe and the second pipeline and the intersection point of the second pipeline and the distribution pipeline; the second electric valve is arranged on the first associated branch pipe, and the third electric valve is arranged on the second associated branch pipe; the water amount control unit is respectively connected with the first electric valve, the second electric valve, the third electric valve and the fourth electric valve and used for controlling the first electric valve, the second electric valve, the third electric valve and the fourth electric valve to adjust the flow in the corresponding pipelines according to the received control instructions.
In an embodiment of the present application, optionally, the heat exchange system further includes an exhaust module, where the exhaust module includes an exhaust main pipe, an exhaust branch pipe, and an exhaust upright pipe; the exhaust branch pipe is connected with the exhaust main pipe, and the exhaust vertical pipe is connected with the exhaust main pipe; the heat exchange device and the circulating water supply unit both comprise exhaust valves, and exhaust outlets of the exhaust valves of the heat exchange device are connected with the exhaust branch pipes and used for discharging air in a water feeding and returning pipeline in the heat exchange device into the exhaust branch pipes through the exhaust valves and discharging the air after being collected by the exhaust manifold through the exhaust vertical pipes.
In an embodiment of the present application, optionally, the heat exchange system further includes a plurality of expansion joints, where the expansion joints are disposed at connection positions of the water feeding port and the water returning port of the first water feeding and returning pipe, and the exhaust branch pipe and the heat exchange device; the expansion joint is used for absorbing relative displacement generated by expansion with heat and contraction with cold in the pipeline.
The application also provides a heat exchange method of the heat exchange system of the surface type indirect air cooling system, and the method comprises the following steps: generating a control instruction according to the anti-freezing risk triggering condition of the heat exchange device; setting the water flow provided by the circulating water supply unit through the water flow control unit according to the control instruction; and controlling the circulating water supply unit to change the circulating water in the first water supply and return pipeline to flow in a reverse flow or a forward flow.
The application also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the method.
The present application also provides a computer-readable storage medium storing a computer program for executing the above method.
The beneficial technical effect of this application lies in: the circulating water integral downstream and integral countercurrent heat exchange modes can be mutually switched, when no freezing risk exists, the countercurrent mode can be selected for operation, the heat exchange efficiency is improved, and when the freezing risk exists, the downstream mode is selected for operation, and the anti-freezing capacity is improved; and the throttle ring is arranged in an inlet or outlet pipe of the heat exchanger close to the circulating water supply and return water pipeline, so that the flow of the heat exchanger in the whole heat exchange unit is evenly distributed, a low-speed water flow area is avoided, and the anti-freezing capacity of the whole heat exchange unit is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, are incorporated in and constitute a part of this application, and are not intended to limit the application. In the drawings:
fig. 1 is a top view of a heat exchange device provided in an embodiment of the present application;
Fig. 2 is a schematic perspective view of a heat exchange device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a middle heat exchange triangle of a heat exchange sector according to an embodiment of the present application;
fig. 4 is a schematic application structure diagram of a heat exchange system of a surface type indirect air cooling system according to an embodiment of the present application;
fig. 5 is a schematic diagram illustrating a principle of counter-flow heat exchange in a heat exchange system of a surface type indirect air cooling system according to an embodiment of the present application;
fig. 6 is a schematic view illustrating a principle of forward flow heat exchange in a heat exchange system of a surface type indirect air cooling system according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The following detailed description will be provided with reference to the drawings and examples to explain how to apply the technical means to solve the technical problems and to achieve the technical effects. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments in the present application may be combined with each other, and the technical solutions formed are all within the scope of the present application.
Additionally, the steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions and, although a logical order is illustrated in the flow charts, in some cases, the steps illustrated or described may be performed in an order different than here.
The heat exchange system of the surface type indirect air cooling system specifically comprises a heat exchange device and a circulating water control device; the heat exchange device is used for replacing heat energy in the circulating water supplied by the circulating water control device through a plurality of groups of first water supply and return pipelines; the circulating water control device comprises a circulating water supply unit and a water quantity control unit; the circulating water supply unit is respectively connected with a water supply port and a water return port of the first water supply and return pipeline and is used for supplying circulating water heated by exhaust steam of a steam turbine at the condenser to the first water supply and return pipeline; and supplying the circulating water after the heat energy is replaced by the first water supply and return pipeline to a condenser to cool the exhaust steam of the steam turbine; the water quantity control unit is used for controlling the circulating water supply unit to change the circulating water flow direction and the circulating water quantity in the first water supply and return pipeline according to the received control instruction. Specifically, referring to fig. 1 and 2, the heat exchange device includes a plurality of heat exchange sectors 1 to 6; the heat exchange sector combination forms a hollow cylindrical heat exchange structure sleeved outside the indirect air cooling tower; the heat exchange sector comprises a heat exchange panel, the first water supply and return pipeline 101 is arranged in the heat exchange panel, wherein a water supply port 102 and a water return port 103 are shown in fig. 1.
Referring to fig. 3, in an embodiment of the present application, the heat exchange sector includes a plurality of heat exchange triangles, and the heat exchange triangles include two heat exchange panels 301 and 302 and a louver member; the louver member includes a louver blowing panel 303 and a wind control unit; the louver air blowing panel and the heat exchange panels 301 and 302 form a hollow triangular prism structure, and the first water supply and return pipeline is arranged on the heat exchange panels 301 and 302 according to a preset track; the air volume control unit is used for controlling the cold air intake volume provided by the louver air blowing panel 303 to the heat exchange panel according to the received control instruction.
Referring to fig. 4, in an embodiment of the present application, the circulating water control apparatus further includes a distribution pipe 401, and the circulating water supply unit is connected to the water supply port and the water return port of the first water supply and return pipe of each heat exchange panel through the distribution pipe 401. Further, the distribution pipe 401 is connected to the water feeding port or the water returning port of the first water feeding and returning pipe by a throttling member 402, wherein the distribution pipe 401 includes two pipes which are respectively connected to the water feeding port and the water returning port of the first water feeding and returning pipe, and functions to input the hot water supplied from the circulating water supplying unit to each heat exchanging sector 403 (where the installation positions of the louver air blowing panel 412 and the air volume control unit 413 can be referred to fig. 4), and obtain the cold water fed back by each heat exchanging sector 403; the resistance coefficient of the throttling element 402 is set according to the distance between the water feeding port of the first water feeding and returning pipeline and the water feeding port of the second water feeding and returning pipeline of the circulating water supply unit; or the distance between the water return port of the first water supply and return pipeline and the water return port of the second water supply and return pipeline is set. Specifically, referring to fig. 4 again, the circulating water supply unit includes a second water supply and return pipe, a first electric valve 404, a second electric valve 405, a third electric valve 406, and a fourth electric valve 407; the second water feeding and returning pipeline comprises a first pipeline 408, a second pipeline 409, a first associated branch pipe 410 and a second associated branch pipe 411; one end of the first pipeline 408 and one end of the second pipeline 409 are connected with a water supply port and a water return port of the first water supply and return pipeline through the distribution pipeline 401, and the other end of the first pipeline is connected with a water supply port and a water return port of the condenser; the first associated branch 410 is connected at one end to the first conduit 408 and at the other end to the second conduit 409 between the fourth electrically operated valve 407 and the intersection of the second conduit 409 with the distribution conduit 401; the second associated branch 411 is connected at one end to the second conduit 409 and at the other end to the first conduit 408 between the first electric valve 404 and the intersection of the first conduit 48 with the distribution conduit 401; the first electric valve 404 is arranged on the first pipe 408 between the intersection of the first associated branch 410 with the first pipe 408 and the intersection of the first pipe 408 with the distribution pipe 401; the fourth electric valve 407 is arranged on the second duct 409, between the intersection of the second associated branch 411 with the second duct 409 and the intersection of the second duct 49 with the distribution duct 401; the second electric valve 405 is arranged on the first associated branch 410 and the third electric valve 406 is arranged on the second associated branch 411; the water amount control unit is respectively connected with the first electric valve 404, the second electric valve 406, the third electric valve 406 and the fourth electric valve 407, and is configured to control the first electric valve 404, the second electric valve 405, the third electric valve 406 and the fourth electric valve 407 to adjust the flow rate in the corresponding pipe according to the received control instruction.
Referring to fig. 4 again, in an embodiment of the present application, the heat exchange system further includes an exhaust module, and the exhaust module includes an exhaust main pipe 414, an exhaust branch pipe 415, and an exhaust upright pipe 416; the exhaust branch pipe 415 is connected with the exhaust manifold 414, and the exhaust upright pipe 416 is connected with the exhaust manifold 414; the heat exchanging device 403 and the circulating water supply unit both include an exhaust valve 417, and an exhaust outlet of the exhaust valve 417 of the heat exchanging device 403 is connected to the exhaust branch pipe 415, so as to discharge the air in the water feeding and returning pipeline of the heat exchanging device 403 through the exhaust valve 417 into the exhaust branch pipe 415, and the air is collected by the exhaust manifold 414 and then discharged through the exhaust upright pipe 416. In another embodiment of the present application, the heat exchange system further includes a plurality of expansion joints 418, where the expansion joints 418 are disposed at the connection positions of the water feeding port and the water returning port of the first water feeding and returning pipe and the exhaust branch pipe 415 and the heat exchange device 403; the expansion joint 418 is used for absorbing relative displacement caused by thermal expansion and contraction in the pipeline.
The application also provides a heat exchange method of the heat exchange system of the surface type indirect air cooling system, and the method comprises the following steps: generating a control instruction according to the anti-freezing risk triggering condition of the heat exchange device; setting the water flow provided by the circulating water supply unit through the water flow control unit according to the control instruction; and controlling the circulating water supply unit to change the circulating water in the first water supply and return pipeline to flow in a reverse flow or a forward flow.
Specifically, in practical operation, please refer to fig. 4 in combination, a counter flow process of the heat exchange system of the surface type indirect air cooling system is as follows:
referring to fig. 5, hot water in a circulating water feed pipe is discharged through an automatic exhaust valve to air in a pipeline, and enters a distribution pipeline through a first electric valve, at this time, the distribution pipeline is a heat exchanger, namely a feed pipe of a heat exchange device, and then enters each heat exchanger through the distribution pipeline, and an inlet pipe and an outlet pipe of each heat exchanger are provided with expansion joints for absorbing relative displacement generated by expansion with heat and contraction with cold between pipelines; an exhaust pipe is arranged at the top of each heat exchanger, an expansion joint is also arranged on each exhaust pipe, and the exhaust pipes are collected to an exhaust main pipe and then exhausted to the atmosphere through an exhaust vertical pipe. Circulating water enters a distribution pipeline after exchanging heat with cold air through a heat exchanger 501, the distribution pipeline is a water return pipe at the moment, and then flows out of the whole heat exchange system through a fourth electric valve to finish the heat exchange process; in the process, the second electric valve and the third electric valve are in a closed state, and the first associated branch pipe and the second associated branch pipe are not communicated.
Similarly, the forward flow process of the heat exchange system of the surface type indirect air cooling system is as follows:
referring to fig. 6, hot water in the circulating water feed pipe is discharged through the automatic exhaust valve to exhaust air in the pipeline, enters the feed return pipeline, i.e. the second pipeline, through the second electric valve, and then enters the distribution pipeline, which is the feed pipe of the heat exchanger, and then enters each heat exchanger through the distribution pipeline, and the inlet and outlet pipes of each heat exchanger are provided with expansion joints for absorbing relative displacement generated by expansion with heat and contraction with cold between the pipelines; an exhaust pipe is arranged at the top of each heat exchanger, an expansion joint is also arranged on each exhaust pipe, and the exhaust pipes are collected to an exhaust main pipe and are exhausted into the atmosphere through an exhaust vertical pipe. Circulating water enters a distribution pipeline after exchanging heat with cold air through the heat exchanger 601, the distribution pipeline is a water return pipe at the moment, then enters a water supply and return pipeline, namely a first pipeline, and flows out of the whole heat exchange unit through a third electric valve to finish the heat exchange process, the first electric valve and the fourth electric valve are in a closed state in the process, and the first associated branch pipe and the second associated branch pipe are communicated.
Therefore, the heat exchange system and the heat exchange method of the heat exchange system of the surface type indirect air cooling system can enable the overall concurrent heat exchange modes and the overall countercurrent heat exchange modes of the circulating water to be mutually switched, can select the countercurrent mode to operate when no freezing risk exists, improve the heat exchange efficiency, and select the concurrent mode to operate when the freezing risk exists, thereby improving the antifreezing capacity; and the throttle ring is arranged in an inlet or outlet pipe of the heat exchanger close to the circulating water supply and return water pipeline, so that the flow of the heat exchanger in the whole heat exchange unit is uniformly distributed, a water flow low-speed area is avoided, and the anti-freezing capacity of the whole heat exchange unit is improved.
The application also provides an electronic device, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the method.
The present application also provides a computer-readable storage medium storing a computer program for executing the above method.
As shown in fig. 7, the electronic device 600 may further include: communication module 110, input unit 120, audio processing unit 130, display 160, power supply 170. It is noted that the electronic device 600 does not necessarily include all of the components shown in fig. 7; furthermore, the electronic device 600 may also comprise components not shown in fig. 7, which may be referred to in the prior art.
As shown in fig. 7, the central processor 100, sometimes referred to as a controller or operation control, may include a microprocessor or other processor device and/or logic device, the central processor 100 receiving input and controlling the operation of the various components of the electronic device 600.
The memory 140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, or other suitable devices. The information relating to the failure may be stored, and a program for executing the information may be stored. And the cpu 100 may execute the program stored in the memory 140 to realize information storage or processing, etc.
The input unit 120 provides an input to the cpu 100. The input unit 120 is, for example, a key or a touch input device. The power supply 170 is used to provide power to the electronic device 600. The display 160 is used to display an object to be displayed, such as an image or a character. The display may be, for example, an LCD display, but is not limited thereto.
The memory 140 may be a solid state memory such as Read Only Memory (ROM), Random Access Memory (RAM), a SIM card, or the like. There may also be a memory that holds information even when power is off, can be selectively erased, and is provided with more data, an example of which is sometimes called an EPROM or the like. The memory 140 may also be some other type of device. Memory 140 includes buffer memory 141 (sometimes referred to as a buffer). The memory 140 may include an application/function storage section 142 for storing application programs and function programs or a flow for executing the operation of the electronic device 600 by the central processing unit 100.
The memory 140 may also include a data store 143 for storing data, such as contacts, digital data, pictures, sounds, and/or any other data used by the electronic device. The driver storage portion 144 of the memory 140 may include various drivers of the electronic device for a communication function and/or for performing other functions of the electronic device (e.g., a messaging application, a directory application, etc.).
The communication module 110 is a transmitter/receiver 110 that transmits and receives signals via an antenna 111. The communication module (transmitter/receiver) 110 is coupled to the central processor 100 to provide an input signal and receive an output signal, which may be the same as in the case of a conventional mobile communication terminal.
Based on different communication technologies, a plurality of communication modules 110, such as a cellular network module, a bluetooth module, and/or a wireless local area network module, etc., may be provided in the same electronic device. The communication module (transmitter/receiver) 110 is also coupled to a speaker 131 and a microphone 132 via an audio processor 130 to provide audio output via the speaker 131 and to receive audio input from the microphone 132 to implement general telecommunication functions. Audio processor 130 may include any suitable buffers, decoders, amplifiers and so forth. In addition, an audio processor 130 is also coupled to the central processor 100, enabling recording locally through a microphone 132, and enabling locally stored sound to be played through a speaker 131.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are further described in detail for the purpose of illustrating the invention, and it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (11)
1. A heat exchange system of a surface type indirect air cooling system is characterized in that the heat exchange system comprises a heat exchange device and a circulating water control device;
the heat exchange device is used for replacing heat energy in the circulating water supplied by the circulating water control device through a plurality of groups of first water supply and return pipelines;
the circulating water control device comprises a circulating water supply unit and a water quantity control unit;
the circulating water supply unit is respectively connected with a water supply port and a water return port of the first water supply and return pipeline and is used for supplying circulating water heated by exhaust steam of a steam turbine at the condenser to the first water supply and return pipeline; and the circulating water after the heat energy is replaced by the first water supply and return pipeline is provided to a condenser to cool the exhaust steam of the steam turbine;
the water quantity control unit is used for controlling the circulating water supply unit to change the circulating water flow direction and the circulating water quantity in the first water supply and return pipeline according to the received control instruction.
2. The system of claim 1, wherein the heat exchange device comprises a plurality of heat exchange sectors;
the heat exchange sector combination forms a hollow cylindrical heat exchange structure sleeved outside the indirect air cooling tower;
The heat exchange sector contains the heat exchange panel, first water feeding and returning pipeline is arranged in the heat exchange panel.
3. The heat exchange system of the surface type indirect air-cooling system of claim 2, wherein the heat exchange sector comprises a plurality of heat exchange triangles, and the heat exchange triangles comprise two heat exchange panels and one louver member;
the shutter member comprises a shutter blowing panel and a wind control unit;
the louver air blowing panel and the heat exchange panel form a hollow triangular prism structure, and the first water supply and return pipeline is arranged on the heat exchange panel according to a preset track;
and the air volume control unit is used for controlling the cold air intake volume provided by the shutter blowing panel to the heat exchange panel according to the received control instruction.
4. The heat exchange system of a surface type indirect air cooling system of claim 1, wherein the circulating water control device further comprises a distribution pipeline, and the circulating water supply unit is connected with the water supply port and the water return port of the first water supply and return pipeline through the distribution pipeline respectively.
5. The heat exchange system of the surface type indirect air cooling system of claim 4, wherein the distribution pipeline is connected with the water feeding port or the water returning port of the first water feeding and returning pipeline through a throttling element; the resistance coefficient of the throttling element is set according to the distance between the water feeding port of the first water feeding and returning pipeline and the water feeding port of the second water feeding and returning pipeline of the circulating water supply unit; or the distance between the water return port of the first water supply and return pipeline and the water return port of the second water supply and return pipeline is set.
6. The heat exchange system of the surface type indirect air cooling system of claim 4, wherein the circulating water supply unit comprises a second water supply and return pipeline, a first electric valve, a second electric valve, a third electric valve and a fourth electric valve;
the second water supply and return pipeline comprises a first pipeline, a second pipeline, a first associated branch pipe and a second associated branch pipe;
one end of the first pipeline and one end of the second pipeline are connected with a water supply port and a water return port of the first water supply and return pipeline through the distribution pipeline, and the other end of the first pipeline and the second pipeline are connected with a water supply port and a water return port of the condenser;
one end of the first associated branch pipe is connected with the first pipeline, and the other end of the first associated branch pipe is connected with the second pipeline and is positioned between the fourth electric valve and the intersection point of the second pipeline and the distribution pipeline;
one end of the second associated branch pipe is connected with the second pipeline, and the other end of the second associated branch pipe is connected with the first pipeline and is positioned between the first electric valve and the intersection point of the first pipeline and the distribution pipeline;
the first electric valve is arranged on the first pipeline and is positioned between the intersection point of the first associated branch pipe and the first pipeline and the intersection point of the first pipeline and the distribution pipeline;
The fourth electric valve is arranged on the second pipeline and is positioned between the intersection point of the second associated branch pipe and the second pipeline and the intersection point of the second pipeline and the distribution pipeline;
the second electric valve is arranged on the first associated branch pipe, and the third electric valve is arranged on the second associated branch pipe;
the water amount control unit is respectively connected with the first electric valve, the second electric valve, the third electric valve and the fourth electric valve and used for controlling the first electric valve, the second electric valve, the third electric valve and the fourth electric valve to adjust the flow in the corresponding pipelines according to the received control instructions.
7. The heat exchange system of the surface type indirect air-cooling system according to claim 1, wherein the heat exchange system further comprises an exhaust module, the exhaust module comprises an exhaust manifold, an exhaust branch pipe and an exhaust upright pipe;
the exhaust branch pipe is connected with the exhaust main pipe, and the exhaust vertical pipe is connected with the exhaust main pipe;
the heat exchange device and the circulating water supply unit both comprise exhaust valves, and exhaust outlets of the exhaust valves of the heat exchange device are connected with the exhaust branch pipes and used for discharging air in a water feeding and returning pipeline in the heat exchange device into the exhaust branch pipes through the exhaust valves and discharging the air after being collected by the exhaust manifold through the exhaust vertical pipes.
8. The heat exchange system of the surface type indirect air cooling system of claim 7, wherein the heat exchange system further comprises a plurality of expansion joints, and the expansion joints are arranged at the connection positions of the water feeding port and the water returning port of the first water feeding and returning pipeline and the exhaust branch pipe and the heat exchange device; the expansion joint is used for absorbing relative displacement generated by expansion with heat and contraction with cold in the pipeline.
9. A heat exchange method of a heat exchange system comprising the surface type indirect air-cooling system of any one of claims 1 to 8, wherein the method comprises:
generating a control instruction according to the anti-freezing risk triggering condition of the heat exchange device;
setting the water flow provided by the circulating water supply unit through the water flow control unit according to the control instruction; and controlling the circulating water supply unit to change the circulating water in the first water supply and return pipeline to flow in a reverse flow or forward flow mode.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of claim 9 when executing the computer program.
11. A computer-readable storage medium storing a computer program for executing the method of claim 9 by a computer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115518406A (en) * | 2022-08-11 | 2022-12-27 | 华北电力科学研究院有限责任公司 | Method and device for debugging flue gas water lifting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115518406A (en) * | 2022-08-11 | 2022-12-27 | 华北电力科学研究院有限责任公司 | Method and device for debugging flue gas water lifting system |
| CN115518406B (en) * | 2022-08-11 | 2024-05-03 | 华北电力科学研究院有限责任公司 | Flue gas water lifting system debugging method and device |
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