Double-machine single-closed type water pump operation system of thermal power plant

Abstract

The utility model provides a thermal power plant double-unit single closed type water pump operation system, which relates to the technical field of water chilling units, and comprises a first unit and a second unit, the first unit and the second unit are the same, and each of the first unit and the second unit comprises a closed type water tank, a water guide pipe and a water pump pipe, one end of the closed type water tank is connected with the water guide pipe, and the other end of the closed type water tank is connected with the water pump pipe. Two groups of water pump pipes are arranged, one ends of the two groups of water pump pipes are connected with a water guide pipe, and closed water pumps are arranged on the two groups of water pump pipes; the first connecting pipe and the second connecting pipe are connected between the first unit and the second unit, cooling water of the first unit synchronously enters the water supply pipes of the two units through the first connecting pipe, and the cooling water is cooled after being used by a user. And cooling water in the water return pipes of the two units flows back to the inlet of the closed water pump of the first unit again through the second connecting pipe, so that double-unit single-closed water pump operation is realized, the annual comprehensive station service power consumption rate is reduced, and the income is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of water cooling units, in particular to a double-machine single closed water pump operation system for a thermal power plant. Background Art

[0002] In power generation companies, the closed water systems of the two units are generally operated independently, each running a closed water pump. The closed water system of unit 1 or unit 2 provides cooling water to the peripheral air compressor, desulfurization and oxidation fan, slurry circulation pump, and fuel supply pump;

[0003] In spring, autumn and winter, the open water temperature is basically controlled at about 20°C, and the closed water temperature does not exceed 25°C. In addition, the ambient temperature is low, and the cooling water consumption by users is very small. Specifically, when the closed water temperature is below 25°C, the main users of closed water, except for the generator hydrogen cooler, need a slightly larger amount of cooling water, and the cooling water regulating valve opening is 10%-20%. The regulating valves of other users are basically in a slightly open state. In spring, autumn and winter, the closed water surplus of a single unit is very large, and running a closed water pump for each unit causes a great waste of energy. Therefore, the utility model proposes a dual-machine single closed water pump operation system for a thermal power plant to solve the problems existing in the prior art. Utility Model Content

[0004] In view of the above problems, the utility model proposes a dual-unit single closed water pump operation system for a thermal power plant, which realizes the operation of dual-unit single closed water pumps, reduces the annual comprehensive plant power consumption rate, improves profits, and achieves the purpose of increasing production, increasing income, and increasing efficiency.

[0005] To achieve the purpose of the utility model, the utility model is implemented through the following technical solutions: a dual-machine single closed water pump operation system of a thermal power plant, comprising a first unit and a second unit, the first unit and the second unit are the same, and the first unit and the second unit both comprise a closed water tank, a water guide pipe and a water pump pipe, one end of the closed water tank is connected to the water guide pipe, two groups of water pump pipes are provided, and one end of the two groups of water pump pipes are connected to the water guide pipe, the two groups of water pump pipes are provided with closed water pumps, and one end of the two groups of water pump pipes is connected to a water supply pipe, the water supply pipe is used to connect the input end of the cooling user, and the output end of the cooling user is connected to the return pipe, and one end of the return pipe is connected to the water guide pipe;

[0006] A first connecting pipe is connected between the water supply pipe of the second unit and the water supply pipe of the first unit, and a first electric door is provided on the first connecting pipe. A second connecting pipe is connected between the return pipe of the second unit and the water guide pipe of the first unit, and a second electric door is provided on the second connecting pipe.

[0007] A further improvement is that: a cooling pipe is connected to the water supply pipe, and two groups of cooling pipes are provided, both groups of cooling pipes are provided with coolers, and first valves are provided on the cooling pipes at both ends of the coolers.

[0008] A further improvement is that a downpipe is connected between the output end of the closed water tank and the water conduit, and a downpipe is provided with a downpipe valve.

[0009] A further improvement is that a drain pipe is connected below one end of the closed water tank, and a drain valve is provided on the drain pipe.

[0010] A further improvement is that a water supply pipe is connected above one end of the closed water tank, and a concentration detector is provided on the water supply pipe.

[0011] A further improvement is that a bypass pipe is connected to the water supply pipe, and a bypass valve is provided on the bypass pipe, and both ends of the bypass pipe are connected to the two end positions of the concentration detector.

[0012] A further improvement is that: a second valve is provided on the water pump pipe at both ends of the closed water pump, and a third valve is provided at the input and output ends of the cooling user.

[0013] The beneficial effects of the utility model are:

[0014] 1. The utility model connects the first communication pipe and the second communication pipe between the first unit and the second unit. After confirming that the conditions are met, the closed water tank of the second unit can be closed, and the two units can be operated in parallel. Then, the closed water pump of the second unit is closed, and the first electric door and the second electric door are opened. The cooling water of the first unit is allowed to enter the water supply pipes of the two units synchronously through the first communication pipe. After the cooling user uses it, the cooling water in the return pipes of the two units is allowed to flow back to the closed water pump inlet of the first unit again through the second communication pipe, thereby realizing the operation of the double units with a single closed water pump, reducing the annual comprehensive plant power consumption rate, improving the income, and achieving the purpose of increasing production, income, and efficiency.

[0015] 2. The first unit and the second unit of the utility model are equipped with two groups of closed water pumps. When the double-unit single closed water pump is in operation, only one closed water pump of one unit needs to be started. In the event of a failure, the closed water supply can be guaranteed by the other three groups of closed water pumps to ensure safety and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the front view of the utility model;

[0017] Figure 2 It is a schematic diagram of the unit structure of the utility model.

[0018] Among them: 1. The first unit; 2. The second unit; 3. The closed water tank; 4. The water guide pipe; 5. The water pump pipe; 6. The closed water pump; 7. The water supply pipe; 8. The cooling user; 9. The return pipe; 10. The first connecting pipe; 11. The first electric door; 12. The second connecting pipe; 13. The second electric door; 14. The cooling pipe; 15. The cooler; 16. The first valve; 17. The sewer pipe; 18. The main drain pipe; 19. The water supply pipe; 20. The concentration detector; 21. The second valve; 22. The third valve; 23. The bypass pipe. DETAILED DESCRIPTION

[0019] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention. Example 1

[0020] according to Figure 1 , 2 As shown, this embodiment proposes a dual-machine single closed water pump operation system for a thermal power plant, comprising a first unit 1 and a second unit 2, wherein the first unit 1 and the second unit 2 are the same, and both the first unit 1 and the second unit 2 comprise a closed water tank 3, a water pipe 4 and a water pump pipe 5, one end of the closed water tank 3 is connected to the water pipe 4, two groups of water pump pipes 5 are provided, and one end of the two groups of water pump pipes 5 are connected to the water pipe 4, closed water pumps 6 are provided on the two groups of water pump pipes 5, and one end of the two groups of water pump pipes 5 are connected to a water supply pipe 7, the water supply pipe 7 is used to connect to the input end of a cooling user 8, and the output end of the cooling user 8 is connected to a return water pipe 9, and one end of the return water pipe 9 is connected to the water pipe 4;

[0021] A first connecting pipe 10 is connected between the water supply pipe 7 of the second unit 2 and the water supply pipe 7 of the first unit 1, and a first electric door 11 is provided on the first connecting pipe 10; a second connecting pipe 12 is connected between the return pipe 9 of the second unit 2 and the water guide pipe 4 of the first unit 1, and a second electric door 13 is provided on the second connecting pipe 12. During use, after confirming that the conditions are met, notify the boiler auxiliary equipment, desulfurization, oil pump room and other peripheral closed water users to pay attention to and monitor the temperature changes of users, close the closed water tank 3 of the second unit 2, run the two units in parallel, check that the closed water systems of the two units are operating normally and the parameters are normal, then slowly close the closed water pump of the second unit 2, open the first electric door 11 and the second electric door 13, connect the first connecting pipe 10 and the second connecting pipe 12, and make the cooling water of the first unit 1 enter the water supply pipes 7 of the two units synchronously through the first connecting pipe 10. After the cooling user 8 uses it, the cooling water in the return pipe 9 of the two units is returned to the water guide pipe 4 of the first unit 1 again through the second connecting pipe 12, to the inlet of the closed water pump 6, check that the temperature of the closed water users of the two units is normal, and the system is operating normally, thereby realizing the operation of a single closed water pump for two units. Exit the dual-machine single closed water pump operation: start a closed water pump 6 of the second unit 2, check that the closed water systems of the two machines are operating normally and the parameters are normal, slowly close the first electric door 11 and the second electric door 13, and open the closed water tank 3 of the second unit 2 to discharge water.

[0022] The water supply pipe 7 is connected with a cooling pipe 14, and there are two groups of cooling pipes 14, both groups of cooling pipes 14 are provided with a cooler 15, and both ends of the cooler 15 are provided with a first valve 16. The cooler 15 is used to cool the cooling water, and there are two groups of coolers 15, one for use and the other for standby.

[0023] A down pipe 17 is connected between the output end of the closed water tank 3 and the water conduit 4, and a down pipe 17 is provided with a down valve. When in use, the down valve is opened to replenish cooling water in the water supply pipe 7.

[0024] A second valve 21 is provided on the water pump pipe 5 at both ends of the closed water pump 6 for opening or closing the water pump pipe 5. A third valve 22 is provided at the input and output ends of the cooling user 8 for opening or closing the access to cooling water. Example 2

[0025] according to Figure 1 , 2As shown, this embodiment proposes a dual-machine single closed water pump operation system for a thermal power plant, comprising a first unit 1 and a second unit 2, wherein the first unit 1 and the second unit 2 are the same, and both the first unit 1 and the second unit 2 comprise a closed water tank 3, a water pipe 4 and a water pump pipe 5, one end of the closed water tank 3 is connected to the water pipe 4, two groups of water pump pipes 5 are provided, and one end of the two groups of water pump pipes 5 are connected to the water pipe 4, closed water pumps 6 are provided on the two groups of water pump pipes 5, and one end of the two groups of water pump pipes 5 are connected to a water supply pipe 7, the water supply pipe 7 is used to connect to the input end of a cooling user 8, and the output end of the cooling user 8 is connected to a return water pipe 9, and one end of the return water pipe 9 is connected to the water pipe 4;

[0026] A first connecting pipe 10 is connected between the water supply pipe 7 of the second unit 2 and the water supply pipe 7 of the first unit 1, and a first electric door 11 is provided on the first connecting pipe 10; a second connecting pipe 12 is connected between the return pipe 9 of the second unit 2 and the water guide pipe 4 of the first unit 1, and a second electric door 13 is provided on the second connecting pipe 12. During use, after confirming that the conditions are met, notify the boiler auxiliary equipment, desulfurization, oil pump room and other peripheral closed water users to pay attention to and monitor the temperature changes of users, close the closed water tank 3 of the second unit 2, run the two units in parallel, check that the closed water systems of the two units are operating normally and the parameters are normal, then slowly close the closed water pump of the second unit 2, open the first electric door 11 and the second electric door 13, connect the first connecting pipe 10 and the second connecting pipe 12, and make the cooling water of the first unit 1 enter the water supply pipes 7 of the two units synchronously through the first connecting pipe 10. After the cooling user 8 uses it, the cooling water in the return pipe 9 of the two units is returned to the water guide pipe 4 of the first unit 1 again through the second connecting pipe 12, to the inlet of the closed water pump 6, check that the temperature of the closed water users of the two units is normal, and the system is operating normally, thereby realizing the operation of a single closed water pump for two units. Exit the dual-machine single closed water pump operation: start a closed water pump 6 of the second unit 2, check that the closed water systems of the two machines are operating normally and the parameters are normal, slowly close the first electric door 11 and the second electric door 13, and open the closed water tank 3 of the second unit 2 to discharge water.

[0027] A drain pipe 18 is connected to the lower part of one end of the closed water tank 3, and a drain valve is arranged on the drain pipe 18. When in use, the drain valve is opened to discharge the excess water in the closed water tank 3 through the drain pipe 18.

[0028] A water supply pipe 19 is connected to the top of one end of the closed water tank 3, and a concentration detector 20 is provided on the water supply pipe 19. A bypass pipe 23 is connected to the water supply pipe 19, and a bypass valve is provided on the bypass pipe 23. Both ends of the bypass pipe 23 are connected to the positions of both ends of the concentration detector 20. When in use, cooling water (deionized water) is added to the closed water tank 3 through the water supply pipe 19, and the concentration is detected by the concentration detector 20. The bypass pipe 23 can be used as a backup connection pipeline when the concentration detector 20 has problems.

[0029] A second valve 21 is provided on the water pump pipe 5 at both ends of the closed water pump 6 for opening or closing the water pump pipe 5. A third valve 22 is provided at the input and output ends of the cooling user 8 for opening or closing the access to cooling water.

[0030] The dual-unit single closed water pump operation system of the thermal power plant connects the first connecting pipe 10 and the second connecting pipe 12 between the first unit 1 and the second unit 2. After confirming that the conditions are met, the closed water tank 3 of the second unit 2 can be closed to operate the two units in parallel, and then the closed water pump of the second unit 2 is closed, and the first electric door 11 and the second electric door 13 are opened. The cooling water of the first unit 1 is allowed to enter the water supply pipes 7 of the two units synchronously through the first connecting pipe 10. After the cooling user 8 uses it, the cooling water in the return pipes 9 of the two units is returned to the inlet of the closed water pump 6 of the first unit 1 again through the second connecting pipe 12, thereby realizing the dual-unit single closed water pump operation, reducing the annual comprehensive plant power consumption rate, and improving the income, so as to achieve the purpose of increasing production, increasing income and increasing efficiency. In addition, the first unit 1 and the second unit 2 of this product are equipped with two sets of closed water pumps 3. When the dual-unit single closed water pump is in operation, only one closed water pump 3 of one unit needs to be started. In the event of a failure, the closed water supply can be guaranteed by the other three sets of closed water pumps 3 to ensure safety and stability.

[0031] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A dual-unit single closed water pump operation system for a thermal power plant, comprising a first unit (1) and a second unit (2), Features: The first unit (1) and the second unit (2) are the same, and both the first unit (1) and the second unit (2) comprise a closed water tank (3), a water pipe (4) and a water pump pipe (5); one end of the closed water tank (3) is connected to the water pipe (4); two groups of water pump pipes (5) are provided, and one end of the two groups of water pump pipes (5) are connected to the water pipe (4); the two groups of water pump pipes (5) are provided with a closed water pump (6); one end of the two groups of water pump pipes (5) are connected to a water supply pipe (7); the water supply pipe (7) is used to connect to an input end of a cooling user (8); and the output end of the cooling user (8) is connected to a return pipe (9); one end of the return pipe (9) is connected to the water pipe (4); A first communication pipe (10) is connected between the water supply pipe (7) of the second unit (2) and the water supply pipe (7) of the first unit (1), and a first electric door (11) is provided on the first communication pipe (10); a second communication pipe (12) is connected between the return pipe (9) of the second unit (2) and the water guide pipe (4) of the first unit (1), and a second electric door (13) is provided on the second communication pipe (12).

2. A thermal power plant dual-machine single closed water pump operation system according to claim 1, Features: The water supply pipe (7) is connected to a cooling pipe (14), and two groups of cooling pipes (14) are provided. Coolers (15) are provided on both groups of cooling pipes (14), and first valves (16) are provided on the cooling pipes (14) at both ends of the coolers (15).

3. A thermal power plant dual-machine single closed water pump operation system according to claim 1, Features: A water discharge pipe (17) is connected between the output end of the closed water tank (3) and the water conduit (4), and a water discharge valve is provided on the water discharge pipe (17).

4. A thermal power plant dual-machine single closed water pump operation system according to claim 3, Features: A drain pipe (18) is connected below one end of the closed water tank (3), and a drain valve is provided on the drain pipe (18).

5. A dual-machine single closed water pump operation system for a thermal power plant according to claim 4, Features: A water supply pipe (19) is connected above one end of the closed water tank (3), and a concentration detector (20) is provided on the water supply pipe (19).

6. A dual-machine single closed water pump operation system for a thermal power plant according to claim 5, Features: The water supply pipe (19) is connected to a bypass pipe (23), and a bypass valve is provided on the bypass pipe (23). Both ends of the bypass pipe (23) are connected to the two end positions of the concentration detector (20).

7. A dual-machine single closed water pump operation system for a thermal power plant according to claim 1, Features: Second valves (21) are provided on the water pump pipe (5) at both ends of the closed water pump (6), and third valves (22) are provided at the input and output ends of the cooling user (8).

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