Spraying system for indirect air cooling system

Abstract

The utility model relates to a spraying system for an indirect air cooling system. The indirect air cooling system comprises a plurality of air cooling tube bundles. The spraying system comprises a spraying main pipe and a plurality of spraying branch pipes. And the plurality of spraying branch pipes are communicated with the spraying main pipe. Each spraying branch pipe extends into a triangular area defined by one air cooling pipe bundle. And the spraying branch pipes are used for spraying the air cooling pipe bundle. By means of the technical scheme, namely the spraying system for the indirect air cooling system, each spraying branch pipe extends into the triangular area defined by the corresponding air cooling pipe bundle so as to achieve independent spraying of each air cooling pipe bundle, and the spraying system is different from the technical scheme that a plurality of air cooling pipe bundles in a quadrant are sprayed in a centralized mode according to the quadrant in the related technology. In the technical scheme provided by the invention, the plurality of spraying branch pipes and the plurality of air cooling pipe bundles can be in one-to-one correspondence, so that the spraying cooling reliability of the spraying system is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power generation, and in particular to a spray system for an indirect air cooling system. Background Art

[0002] The exhaust steam from the turbine enters the condenser of the indirect air cooling system for condensation and cooling. The cooled exhaust steam returns to the boiler for recycling. The cooling water used to condense and cool the exhaust steam in the condenser will continue to flow into the air cooling tube bundle of the indirect air cooling system. The temperature of the cooling water will be reduced through natural ventilation, and then enter the condenser again to cool the exhaust steam for recycling. The air cooling tube bundle (also known as the "cooling triangle") of the indirect air cooling system is placed vertically at the bottom of the cooling tower. The air flows outside the tube bundle, and the cooling water cools down inside the tube bundle.

[0003] When the ambient temperature is relatively high in summer, the indirect air-cooling unit will have increased back pressure, reduced power generation efficiency of the unit, and even forced the entire unit to operate at a reduced load. In response to this problem, it is necessary to transform the indirect air-cooling unit. The installation of a spray cooling system can spray and cool the air-cooling tube bundles at the bottom of the cooling tower in summer, improve the heat exchange efficiency, reduce the back pressure of the unit, reduce coal consumption, and improve the load-carrying capacity of the unit. At the same time, it can also stabilize the back pressure of the unit in meteorological conditions with sudden changes in wind direction, and safely pass the high-load summer. In the related technology, the cooling tower is simply divided into four quadrants, each of which contains multiple air-cooling tube bundles, and each quadrant is provided with a spray branch pipe to achieve the purpose of spraying and cooling multiple air-cooling tube bundles. This setting method makes it impossible for some air-cooling tube bundles in each quadrant to be sprayed in place and thus cannot be effectively cooled.

[0004] Therefore, it is urgent to provide a new spray system for the indirect air cooling system of a thermal power generator set to achieve the purpose of reliable spraying and cooling of the air cooling tube bundle. Utility Model Content

[0005] The purpose of the present disclosure is to provide a spray system for an indirect air cooling system, so that the spray system can be used to achieve the purpose of reliable spraying and cooling of air cooling tube bundles, so as to at least partially solve the related technical problems.

[0006] In order to achieve the above-mentioned object, the present disclosure provides a spray system for an indirect air cooling system. The indirect air cooling system comprises a plurality of air cooling tube bundles. The spray system comprises: a spray main pipe; a plurality of spray branches, the plurality of spray branches are connected to the spray main pipe, each of the spray branches extends to a triangular area surrounded by the air cooling tube bundles, and the spray branches are used to spray the air cooling tube bundles.

[0007] Optionally, the spray system further comprises a plurality of quadrant spray branch pipes, wherein the plurality of spray branch pipes are divided into a plurality of spray pipe groups, and each spray pipe group is connected to the spray main pipe through a quadrant spray branch pipe.

[0008] Optionally, each of the quadrant spray branches is provided with a first filter and a first valve.

[0009] Optionally, the spray system also includes a water inlet pipe and a first water pump arranged on the water inlet pipe, one end of the water inlet pipe is connected to the spray main pipe, and the other end is used to connect to a storage device for storing heat exchange medium, and the first water pump is used to pump the heat exchange medium in the storage device into the spray main pipe.

[0010] Optionally, the spray system further comprises a second water pump, wherein the second water pump is located upstream of the first water pump on the water inlet pipe, and the second water pump is configured to be located in the storage device.

[0011] Optionally, the spray system further includes a first monitoring module, the first monitoring module includes a first pressure transmitter connected to the water inlet pipe, and the first pressure transmitter is arranged between the first water pump and the spray main pipe.

[0012] Optionally, the first monitoring module further includes a flow transmitter connected to the water inlet pipe, and the flow transmitter is arranged between the first water pump and the sprinkler main pipe.

[0013] Optionally, the spray system further includes a second monitoring module, the second monitoring module includes a second pressure transmitter connected to the water inlet pipe, and the second pressure transmitter is arranged between the first water pump and the second water pump.

[0014] Optionally, the spray system further includes a first valve group and a second valve group, the first valve group being arranged on the water inlet pipe and located between the first water pump and the first monitoring module, and the second valve group being arranged on the water inlet pipe and located between the second water pump and the second monitoring module.

[0015] Optionally, the spray system further includes a controller, and the first water pump, the second water pump, the first monitoring module, the second monitoring module and the first valve group are all connected to the controller by signal.

[0016] Through the above technical solution, i.e., the spray system for the indirect air cooling system, each spray branch pipe extends to a triangular area surrounded by an air cooling tube bundle, so as to realize independent spraying of each air cooling tube bundle in combination with the structure of the air cooling tube bundle, which is different from the technical solution of the related art that performs centralized spraying of multiple air cooling tube bundles in the quadrant according to the quadrant. In the technical solution provided by the present disclosure, multiple spray branches and multiple air cooling tube bundles can correspond one to one, thereby improving the reliability of spray cooling of the spray system.

[0017] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0019] Figure 1 is a schematic diagram of a spray system provided according to an embodiment of the present disclosure.

[0020] Description of reference numerals:

[0021] 1. Air-cooling tube bundle; 2. Spray main pipe; 3. Spray branch pipe; 4. Quadrant spray branch pipe; 5. Spray pipe group; 6. First filter; 7. First valve; 8. Water inlet pipe; 9. First water pump; 10. Storage device; 11. Second water pump; 12. First monitoring module; 121. First pressure transmitter; 122. Flow transmitter; 13. Second monitoring module; 131. Second pressure transmitter; 14. First valve group; 141. Second valve; 142. Third valve; 143. Check valve; 144. First drain valve; 15. Second valve group; 151. Fourth valve; 152. Second drain valve; 16. Second filter; 17. Controller; 18. First pressure gauge; 19. Second pressure gauge. DETAILED DESCRIPTION

[0022] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0023] In the present disclosure, unless otherwise specified, “inside and outside” refer to the inside and outside of the corresponding component outline; in addition, it should be noted that the terms used, such as “first, second”, etc., are used to distinguish one element from another.

[0024] According to a specific embodiment of the present disclosure, a spray system for an indirect air cooling system is provided. Figure 1As shown, the indirect air cooling system may include a plurality of air cooling tube bundles 1. The spray system may include a spray main pipe 2 and a plurality of spray branch pipes 3. A plurality of spray branch pipes 3 are connected to the spray main pipe 2. Each spray branch pipe 3 extends into a triangular area surrounded by an air cooling tube bundle 1. The spray branch pipe 3 is used to spray the air cooling tube bundle 1. In the embodiment provided by the present disclosure, each spray branch pipe 3 extends into a triangular area surrounded by an air cooling tube bundle 1 to achieve independent spraying of each air cooling tube bundle 1, which is different from the technical solution of the related art that performs centralized spraying of a plurality of air cooling tube bundles 1 in a quadrant according to the quadrant. In the technical solution provided by the present disclosure, a plurality of spray branch pipes 3 and a plurality of air cooling tube bundles 1 can correspond one to one, thereby improving the reliability of spray cooling of the spray system, and the spray branch pipe 3 extends into the triangular area surrounded by the air cooling tube bundle 1, which can be combined with the structure of the air cooling tube bundle 1 itself to achieve rapid cooling of the air cooling tube bundle 1.

[0025] In some embodiments, Figure 1 As shown, the spray system may also include a plurality of quadrant spray branches 4. The plurality of spray branches 3 are divided into a plurality of spray pipe groups 5. Each spray pipe group 5 is connected to the spray main pipe 2 through a quadrant spray branch 4. In this embodiment, the plurality of spray branches 3 are divided into a plurality of spray pipe groups 5, and the plurality of spray branches 3 in the spray pipe group 5 are connected to the spray main pipe 2 through the quadrant spray branch 4. Such a setting is convenient for the zoning control of the plurality of spray branches 3, and can save the number of valves and related filtering devices used. Specifically, a first filter 6 and a first valve 7 may be provided on each quadrant spray branch 4. Compared with providing a filter and a valve on each spray branch 3, such a setting effectively reduces the number of valves and related filtering devices used, and reduces the use cost of the spray system. Further, on the quadrant spray branch 4, the first filter 6 may be located downstream of the first valve 7, wherein the upstream or downstream may refer to the flow direction of the heat exchange medium flowing through the quadrant spray branch 4.

[0026] In some embodiments, Figure 1 As shown, the spray system may further include a water inlet pipe 8 and a first water pump 9 provided on the water inlet pipe 8. One end of the water inlet pipe 8 may be connected to the spray main pipe 2, and the other end is used to be connected to a storage device 10 for storing heat exchange medium. The first water pump 9 is used to pump the heat exchange medium in the storage device 10 into the spray main pipe 2. The first water pump 9 may be configured as a spray pump. The storage device 10 may be configured as a water collecting tank, an underground well, etc., which is not limited here, and those skilled in the art may select according to actual conditions.

[0027] In some embodiments, in order to improve the pumping reliability of the first water pump 9, as Figure 1As shown, the spray system may further include a second water pump 11. The second water pump 11 is located upstream of the first water pump 9 on the water inlet pipe 8. The upstream or downstream may refer to the flow direction of the heat exchange medium flowing through the water inlet pipe 8. The second water pump 11 is used to be located in the storage device 10. In a specific application scenario, the second water pump 11 may be configured as a self-priming pump, the first water pump 9 may be configured as a spray pump, and the storage device 10 may be configured as an underground well. The provision of the second water pump 11 can assist the first water pump 9 in reliably pumping the heat exchange medium in the storage device 10 to the spray main pipe 2, thereby improving the operational reliability of the spray system.

[0028] In some embodiments, the spray system may further include a second filter 16, which is disposed at a position where the water inlet pipe 8 is located upstream of the second water pump 11. The second filter 16 can filter the heat exchange medium in the storage device 10 that enters the second water pump 11, thereby preventing impurities from entering the second water pump 11 and affecting the normal operation of the second water pump 11.

[0029] In some embodiments, Figure 1 As shown, the spray system may also include a first monitoring module 12. The first monitoring module 12 may include a first pressure transmitter 121 connected to the water inlet pipe 8. The first pressure transmitter 121 is arranged between the first water pump 9 and the spray main pipe 2. The first pressure transmitter 121 can monitor the pressure of the heat exchange medium pumped by the first water pump 9 to the spray main pipe 2, and convert the pressure parameters of the heat exchange medium into a standard electrical signal to ensure that the heat exchange medium pumped to the spray main pipe 2 can have sufficient pressure for the subsequent spray branch pipe 3 to reliably spray the cooling tube bundle. The first pressure transmitter 121 is used here to monitor the pressure of the heat exchange medium mainly to utilize the advantages of the pressure transmitter such as reliable operation, stable performance, simple maintenance, and convenient installation and debugging.

[0030] In some embodiments, the first monitoring module 12 may also include a flow transmitter 122 connected to the water inlet pipe 8. The flow transmitter 122 is disposed between the first water pump 9 and the spray main pipe 2. The flow transmitter 122 can monitor the flow of the heat exchange medium pumped by the first water pump 9 to the spray main pipe 2, and convert the flow parameter of the heat exchange medium into a standard electrical signal to ensure that the heat exchange medium pumped to the spray main pipe 2 can have sufficient flow for the subsequent spray branch pipe 3 to reliably spray the cooling tube bundle. The flow transmitter 122 is used here to monitor the pressure of the heat exchange medium mainly to utilize the advantages of the flow transmitter 122 such as reliable operation, stable performance, and long service life.

[0031] In some embodiments, the spray system may further include a second monitoring module 13. The second monitoring module 13 may include a second pressure transmitter 131 connected to the water inlet pipe 8. The second pressure transmitter 131 is disposed between the first water pump 9 and the second water pump 11. The second pressure transmitter 131 can monitor the pressure of the heat exchange medium pumped by the second water pump 11 to the first water pump 9, and convert the pressure parameters of the heat exchange medium into a standard electrical signal to ensure that the heat exchange medium pumped to the first water pump 9 has sufficient pressure for the subsequent first water pump 9 to further pump the heat exchange medium into the spray main pipe 2. The second pressure transmitter 131 is used here to monitor the pressure of the heat exchange medium mainly to utilize the advantages of the pressure transmitter such as reliable operation, stable performance, simple maintenance, and convenient installation and debugging.

[0032] In some embodiments, the spray system may further include a first pressure gauge 18 and a second pressure gauge 19, both of which are disposed on the water inlet pipe 8, and the first pressure gauge 18 and the second pressure gauge 19 are respectively located downstream and upstream of the first water pump 9 in the water inlet pipe 8. The upstream or downstream may refer to the flow direction of the heat exchange medium flowing through the water inlet pipe 8. The provision of the first pressure gauge 18 and the second pressure gauge 19 can improve the reliability of monitoring the pressure of the heat exchange medium flowing in the water inlet pipe 8 on the basis of the first pressure transmitter 121 and the second pressure transmitter 131.

[0033] In some embodiments, the spray system may further include a first valve group 14 and a second valve group 15. The first valve group 14 is disposed on the water inlet pipe 8 and between the first water pump 9 and the first monitoring module 12. The second valve group 15 is disposed on the water inlet pipe 8 and between the second water pump 11 and the second monitoring module 13. The first valve group 14 can be used to control the opening and closing of the outlet of the first water pump 9, so that when the first valve group 14 is opened, the first water pump 9 can pump the heat exchange medium in the water inlet pipe 8 to the spray main pipe 2, and vice versa, when the first valve group 14 is closed, the outlet of the first water pump 9 is closed. Accordingly, the second valve group 15 can be used to control the opening and closing of the outlet of the second water pump 11, so that when the second valve group 15 is opened, the second water pump 11 can pump the heat exchange medium in the storage device 10 to the first water pump 9, and vice versa, when the second valve group 15 is closed, the outlet of the second water pump 11 is closed. Specifically, the first valve group 14 may include a check valve 143, a third valve 142, a second valve 141, and a first drain valve 144, which are sequentially arranged on the water inlet pipe 8 and located at the downstream position of the first water pump 9 in the water inlet pipe 8. Among them, the third valve 142 and the first drain valve 144 may be manual valves, and correspondingly, the second valve 141 may be an electric valve. The second valve group 15 may include a fourth valve 151 and a second drain valve 152, which are sequentially arranged on the water inlet pipe 8 and located at the upstream and downstream positions of the second water pump 11 in the water inlet pipe 8. Among them, the fourth valve 151 and the second drain valve 152 may be manual valves.

[0034] In some embodiments, the spray system may further include a controller 17. The first water pump 9, the second water pump 11, the first monitoring module 12, the second monitoring module 13, the first valve group 14, and the second valve group 15 are all connected to the controller 17 by signal. Specifically, the controller 17 may be connected to the second valve 141 in the first valve group 14 by signal. In the technical solution provided by the present disclosure, the signal connection between the second valve 141 and the controller 17 can realize automatic control of the second valve 141 constructed as an electric valve, which is convenient for automated management. The third valve 142 and the fourth valve 151 constructed as manual valves can realize manual control, which improves the control reliability of the circulation of the heat exchange medium in the water inlet pipe 8. Specifically, when the spray system is running, the first drain valve 144 and the second drain valve 152 are in a normally closed state, and the first valve 7, the fourth valve 151 and the third valve 142 are in a normally open state, wherein the first valve 7 can be a manual valve, and the controller 17 controls the second valve 141 to be in an open state, and then controls the second water pump 11 to run. After the second water pump 11 runs for a period of time, it controls the first water pump 9 to run. Through the mutual cooperation of the second water pump 11 and the first water pump 9, the heat exchange medium in the storage device 10 can be pumped into the spray branch pipe 3 in sequence through the water inlet pipe 8, the spray main pipe 2, and the quadrant spray branch pipe 43. A plurality of nozzles (not shown in the figure) can be arranged at intervals on each spray branch pipe 3, and the heat exchange medium can be sprayed onto the corresponding heat exchange tube bundle through the nozzles in atomization to achieve the purpose of cooling. When the spray system is running, the first pressure transmitter 121, the second pressure transmitter 131, and the flow transmitter 122 are used to monitor the pressure and flow of the heat exchange medium in real time. When the flow or pressure of the heat exchange medium is abnormal, the first pressure transmitter 121, the second pressure transmitter 131 or the flow transmitter 122 will transmit an electrical signal to the controller 17 for alarm operation, and will control the first water pump 9 and the second water pump 11 to stop, and can close the second valve 141. Among them, the controller can be, for example, a PLC controller or a single-chip microcomputer. In addition, a plurality of nozzles can be arranged at intervals along the extension direction of the spray branch pipe 3, and adjacent nozzles can be staggered in the circumferential direction of the spray branch pipe 3. For example, three adjacently arranged nozzles can be spaced 120° apart in the circumferential direction to fully cool the tubes on the three inner surfaces of the triangular area surrounded by the air-cooled tube bundle.

[0035] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0036] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0037] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A spray system for an indirect air cooling system, the indirect air cooling system comprising a plurality of air cooling tube bundles, characterized in that: The spray system comprises: Sprinkler mains; A plurality of spray branch pipes are connected to the spray main pipe, each of the spray branch pipes extends into a triangular area surrounded by the air-cooling tube bundle, and the spray branch pipe is used to spray the air-cooling tube bundle.

2. The spray system according to claim 1, characterized in that: The spray system further comprises a plurality of quadrant spray branch pipes, wherein the plurality of spray branch pipes are divided into a plurality of spray pipe groups, and each spray pipe group is connected to the spray main pipe through a quadrant spray branch pipe.

3. The spray system according to claim 2, characterized in that: Each of the quadrant spray branch pipes is provided with a first filter and a first valve.

4. The spray system according to claim 1, characterized in that: The spray system also includes a water inlet pipe and a first water pump arranged on the water inlet pipe. One end of the water inlet pipe is connected to the spray main pipe, and the other end is used to connect to a storage device for storing heat exchange medium. The first water pump is used to pump the heat exchange medium in the storage device into the spray main pipe.

5. The spray system according to claim 4, characterized in that: The spray system further comprises a second water pump, which is located upstream of the first water pump on the water inlet pipe, and the second water pump is configured to be located in the storage device.

6. The spray system according to claim 5, characterized in that The spray system further includes a first monitoring module, which includes a first pressure transmitter connected to the water inlet pipe, and the first pressure transmitter is arranged between the first water pump and the spray main pipe.

7. The spray system according to claim 6, characterized in that The first monitoring module also includes a flow transmitter connected to the water inlet pipe, and the flow transmitter is arranged between the first water pump and the spray main pipe.

8. The spray system according to claim 6, characterized in that: The spray system further includes a second monitoring module, the second monitoring module includes a second pressure transmitter connected to the water inlet pipe, and the second pressure transmitter is arranged between the first water pump and the second water pump.

9. The spray system according to claim 8, characterized in that The spray system further includes a first valve group and a second valve group. The first valve group is arranged on the water inlet pipe and located between the first water pump and the first monitoring module. The second valve group is arranged on the water inlet pipe and located between the second water pump and the second monitoring module.

10. The spray system according to claim 9, characterized in that The spray system further includes a controller, and the first water pump, the second water pump, the first monitoring module, the second monitoring module and the first valve group are all connected to the controller by signal.

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