Closed cooling system for thermoelectric key equipment

Abstract

The utility model provides a closed cooling system for thermoelectric key equipment, and relates to the technical field of closed cooling systems. The closed cooling system for the thermoelectric key equipment comprises a first cooling module, a second cooling module, a circulating water tank, a first water inlet pipe, a first water outlet pipe, a first water pump, a first stop valve, a water flow indicator, a second stop valve, a second water inlet pipe, a second water outlet pipe, a second water pump and a third stop valve, the connection point of the second water outlet pipe and the first water outlet pipe is located between the water flow indicator on the first water outlet pipe and the second stop valve, and the second water outlet pipe is provided with a fourth stop valve. Through the arrangement of the two cooling systems, when a common cooling system breaks down, a standby cooling system can be switched in time; and the risk of pressure loss and water break of the cooling system is prevented, so that overheating damage of the thermoelectric key equipment can be effectively avoided, meanwhile, the thermoelectric key equipment can operate normally, serious influence on production is avoided, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of closed cooling systems, in particular to a closed cooling system for key thermoelectric equipment. Background Art

[0002] The boiler's feed water pump, condensate circulation pump, induced draft fan, and slag removal and cooler are basic auxiliary equipment essential to maintaining boiler operation. If any of the equipment stops operating due to a fault, the boiler may be directly shut down.

[0003] The closed water cooling system currently used in thermoelectric power plants adopts a single-loop circulation design, and the connecting valve components of the equipment interfaces and pipelines and related instrumentation and control components are all designed with flange connections. There is a risk that the entire cooling system will immediately lose pressure and water supply if a fault occurs. Utility Model Content

[0004] The utility model aims to provide a closed cooling system for key thermoelectric equipment, aiming to solve the problems mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: the closed cooling system of the key thermoelectric equipment includes a first cooling module and a second cooling module for cooling the key thermoelectric equipment, the first cooling module and the second cooling module can cool the key thermoelectric equipment separately, and also includes a circulating water pool, the first cooling module includes a first water inlet pipe, a first water outlet pipe and a first water pump, the first water pump is used to cool the key thermoelectric equipment with cooling water in the circulating water pool through the first water inlet pipe, and re-transport the cooling water that has cooled the key thermoelectric equipment to the circulating water pool through the first water outlet pipe, the first stop valve is arranged on the first water inlet pipe, and the first water outlet pipe is sequentially provided with water flow indicators and a second stop valve, the second cooling module includes a second water inlet pipe, a second water outlet pipe and a second water pump, one end of the second water inlet pipe is connected with the water outlet of the second water pump, the other end of the second water inlet pipe is connected with the first water inlet pipe, the connection point between the second water inlet pipe and the first water inlet pipe is located between the first stop valve and the key thermoelectric equipment, the second water inlet pipe is provided with a third stop valve, one end of the second water outlet pipe is located inside the circulating water pool, the other end of the second water outlet pipe is connected with the first water outlet pipe, the connection point between the second water outlet pipe and the first water outlet pipe is located between the water flow indicator and the second stop valve on the first water outlet pipe, and the second water outlet pipe is provided with a fourth stop valve.

[0006] Preferably, a check valve is provided on the first water inlet pipe, and the check valve is used to prevent the cooling water in the first water inlet pipe from flowing back.

[0007] Preferably, a filter is provided on the first water inlet pipe, and the filter is used to filter impurities in the cooling water. The check valve is located between the first water pump and the filter.

[0008] Preferably, a high-position exhaust valve is provided on the first water inlet pipe, and the high-position exhaust valve is used to exhaust the gas entering into the first water inlet pipe.

[0009] Preferably, a solenoid valve is provided on one side of the first stop valve, the second stop valve, the third stop valve and the fourth stop valve, and the cooling water passes through the solenoid valve before passing through the first stop valve, the second stop valve, the third stop valve and the fourth stop valve respectively.

[0010] The beneficial effects of the utility model are:

[0011] By setting up two cooling systems, when the common cooling system fails, the backup cooling system can be switched in time to prevent the risk of pressure loss and water shortage in the cooling system, thereby effectively avoiding overheating and damage of key thermoelectric equipment. At the same time, the key thermoelectric equipment can still operate normally without causing serious impact on production, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a specific embodiment of the utility model.

[0013] In the figure: 1. Key equipment for thermal power generation; 2. Circulating water pool; 3. First water inlet pipe; 4. First water pump; 5. First water outlet pipe; 6. First stop valve; 7. Water flow indicator; 8. Second stop valve; 9. Second water inlet pipe; 10. Second water outlet pipe; 11. Second water pump; 12. Third stop valve; 13. Fourth stop valve; 14. Check valve; 15. Filter; 16. High-level exhaust valve; 17. Solenoid valve. DETAILED DESCRIPTION

[0014] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.

[0015] like Figure 1As shown, a closed cooling system for thermoelectric key equipment includes a first cooling module and a second cooling module for cooling the thermoelectric key equipment 1, the first cooling module and the second cooling module can cool the thermoelectric key equipment 1 separately, and also includes a circulating water pool 2, the first cooling module includes a first water inlet pipe 3, a first water outlet pipe 5 and a first water pump 4, the first water pump 4 is used to cool the thermoelectric key equipment 1 with cooling water in the circulating water pool 2 through the first water inlet pipe 3, and re-transport the cooling water that has cooled the thermoelectric key equipment 1 to the circulating water pool 2 through the first water outlet pipe 5, a first stop valve 6 is arranged on the first water inlet pipe 3, a water flow indicator 7 and a second stop valve 8 are arranged on the first water outlet pipe 5 in sequence, and the second cooling module It includes a second water inlet pipe 9, a second water outlet pipe 10 and a second water pump 11, one end of the second water inlet pipe 9 is connected to the water outlet of the second water pump 11, the other end of the second water inlet pipe 9 is connected to the first water inlet pipe 3, the connection point between the second water inlet pipe 9 and the first water inlet pipe 3 is located between the first stop valve 6 and the key thermal power equipment 1, the second water inlet pipe 9 is provided with a third stop valve 12, one end of the second water outlet pipe 10 is located inside the circulating water pool 2, the other end of the second water outlet pipe 10 is connected to the first water outlet pipe 5, the connection point between the second water outlet pipe 10 and the first water outlet pipe 5 is located between the water flow indicator 7 and the second stop valve 8 on the first water outlet pipe 5, and the second water outlet pipe 10 is provided with a fourth stop valve 13.

[0016] Both the first cooling module and the second cooling module can cool the thermoelectric key device 1, but of the two, the first cooling module is a commonly used cooling system. The first cooling module is used to cool the thermoelectric key device 1 to ensure that the thermoelectric key device 1 can be used normally. When there is a problem with the components in the first cooling module, which affects the normal use of the thermoelectric key device 1 or even damages the thermoelectric key device 1, it is switched to the second cooling module. The second cooling module is a backup cooling system and can be enabled when the first cooling module fails or fails. Specifically, the first water pump 4 pumps the cooling water in the circulating water pool 2 into the first water inlet pipe 3, and then transports it to the thermoelectric key device 1 through the first stop valve 6. When the cooling water passes through the thermoelectric key device 1, the thermoelectric key device 1 is cooled. The cooling water heated by the thermoelectric key device 1 re-enters the circulating water pool 2 through the first water outlet pipe 5. After cooling, it is pumped into the first water inlet pipe 3 by the first water pump 4 again to realize circulating cooling of the key thermoelectric device 1; when the first cooling module fails, the first stop valve 6 and the second stop valve 8 are closed, the third stop valve 12 and the fourth stop valve 13 are opened, and the second water pump 11 is started. The second water pump 11 pumps the cooling water in the circulating water pool 2 to the second water inlet pipe 9, and the cooling water is successively transported to the key thermoelectric device 1 through the third stop valve 12, and the key thermoelectric device 1 is cooled. The cooling water heated by the key thermoelectric device 1 enters the second water outlet pipe 10, and then returns to the circulating water pool 2 after passing through the fourth stop valve 13. The cooling water in the circulating water pool 2 is continuously transported to the key thermoelectric device 1 by the second water pump 11 and cooled, so that it can be ensured that in the event of a failure of the first cooling module, the key thermoelectric device 1 can still be cooled, thereby ensuring the normal use of the key thermoelectric device 1 and preventing its components from being overheated and damaged.

[0017] When the fault of the first cooling module is repaired, the first stop valve 6 and the second stop valve 8 are opened, and the third stop valve 12 and the fourth stop valve 13 are closed, so as to continue to cool the thermoelectric key device 1 through the first cooling module.

[0018] Since the second cooling module is a backup cooling system, the diameter of the pipe in the second cooling module is smaller than that in the first cooling module, which can ensure the normal cooling demand of the key thermoelectric equipment 1 and save pipe costs.

[0019] The water flow indicator 7 can monitor the water flow movement. When a pipeline fails, the water flow signal can be converted into an electrical signal and an alarm action can be made.

[0020] Furthermore, a check valve 14 is provided on the first water inlet pipe 3 , and the check valve 14 is used to prevent the cooling water in the first water inlet pipe 3 from flowing back.

[0021] Furthermore, a filter 15 is provided on the first water inlet pipe 3 , and the filter 15 is used to filter impurities in the cooling water. The check valve 14 is located between the first water pump 4 and the filter 15 .

[0022] Furthermore, a high-level exhaust valve 16 is provided on the first water inlet pipe 3, and the high-level exhaust valve 16 is used to exhaust the gas entering the first water inlet pipe 3 to prevent the water hammer effect in the first water inlet pipe 3 and the first water outlet pipe 5 from damaging the valve and the pipeline.

[0023] Furthermore, a solenoid valve 17 is provided on one side of the first stop valve 6, the second stop valve 8, the third stop valve 12 and the fourth stop valve 13. The cooling water passes through the solenoid valve 17 before passing through the first stop valve 6, the second stop valve 8, the third stop valve 12 and the fourth stop valve 13 respectively. The solenoid valve 17 is connected to the DCS system to remotely control the switch of the solenoid valve 17. After the solenoid valve 17 is installed, the first stop valve 6, the second stop valve 8, the third stop valve 12 and the fourth stop valve 13 are all in a normally open state. The solenoid valve 17 can be used to conveniently remotely control the switching of the first cooling module and the second cooling module. When any solenoid valve 17 has a problem, the pipeline can be controlled to be on and off by the nearest and matching stop valve.

[0024] By setting up two cooling systems, when the common cooling system fails, the backup cooling system can be switched in time to prevent the risk of pressure loss and water shortage in the cooling system, thereby effectively avoiding overheating and damage of the thermoelectric key equipment 1. At the same time, the thermoelectric key equipment 1 can still operate normally, will not cause serious impact on production, and has a good use effect.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A closed cooling system for key thermoelectric equipment, characterized in that: The invention comprises a first cooling module and a second cooling module for cooling a key thermoelectric device (1), wherein the first cooling module and the second cooling module can cool the key thermoelectric device (1) independently, and further comprises a circulating water pool (2), wherein the first cooling module comprises a first water inlet pipe (3), a first water outlet pipe (5) and a first water pump (4), wherein the first water pump (4) is used to cool the key thermoelectric device (1) with cooling water in the circulating water pool (2) through the first water inlet pipe (3), and to transport the cooling water that has cooled the key thermoelectric device (1) back to the circulating water pool (2) through the first water outlet pipe (5), wherein the first water inlet pipe (3) is provided with a first stop valve (6), and the first water outlet pipe (5) is provided with a water flow indicator (7) and a second stop valve (8) in sequence, and the second cooling module comprises a second water inlet pipe (9) and a second water outlet pipe ( 10) and a second water pump (11), one end of the second water inlet pipe (9) is connected to the water outlet of the second water pump (11), the other end of the second water inlet pipe (9) is connected to the first water inlet pipe (3), the connection point between the second water inlet pipe (9) and the first water inlet pipe (3) is located between the first stop valve (6) and the key thermoelectric device (1), the second water inlet pipe (9) is provided with a third stop valve (12), one end of the second water outlet pipe (10) is located inside the circulating water pool (2), the other end of the second water outlet pipe (10) is connected to the first water outlet pipe (5), the connection point between the second water outlet pipe (10) and the first water outlet pipe (5) is located between the water flow indicator (7) on the first water outlet pipe (5) and the second stop valve (8), and the second water outlet pipe (10) is provided with a fourth stop valve (13).

2. The closed cooling system for key thermoelectric equipment according to claim 1 is characterized in that: The first water inlet pipe (3) is provided with a check valve (14), which is used to prevent the cooling water in the first water inlet pipe (3) from flowing back.

3. The closed cooling system for key thermoelectric equipment according to claim 2 is characterized in that: The first water inlet pipe (3) is provided with a filter (15), the filter (15) being used to filter impurities in cooling water, and the check valve (14) is located between the first water pump (4) and the filter (15).

4. The closed cooling system for key thermoelectric equipment according to claim 3 is characterized in that: The first water inlet pipe (3) is provided with a high-position exhaust valve (16), and the high-position exhaust valve (16) is used to exhaust the gas entering the first water inlet pipe (3).

5. The closed cooling system for key thermoelectric equipment according to any one of claims 1 to 4, characterized in that: A solenoid valve (17) is provided on one side of the first stop valve (6), the second stop valve (8), the third stop valve (12) and the fourth stop valve (13); and cooling water first passes through the solenoid valve (17) before passing through the first stop valve (6), the second stop valve (8), the third stop valve (12) and the fourth stop valve (13).

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