Pump warming system for water pump of steam system

Abstract

The utility model relates to a pump warming system for a steam system water pump. The pump warming-up system comprises a water pump unit for a steam system, the pump warming-up system further comprises a heat recovery deaerator unit, the water pump unit comprises a plurality of water pump parts, and each water pump part comprises a plurality of water pump parts; the water pump part comprises a water pump, a water outlet of the heat recovery deaerator unit is connected with an inlet of the water pump through a water pump inlet valve, a first tee joint is arranged on an outlet pipeline of the water pump, and the second end of the first tee joint is connected with an external water supply pipeline through a water pump outlet valve and a second tee joint. The third end of the first tee joint is connected with the heat recovery deaerator unit through a circulating pipeline with a recirculation valve, and the water pump is connected with the third end of the second tee joint through a first drain valve. The device has the advantages of being simple in structure, reasonable in design and capable of prolonging the service life of the valve and avoiding waste of desalted water on the premise of guaranteeing long-time stable operation of a steam system.

Description

Technical Field

[0001] The utility model relates to the technical field of steam system accessory components, in particular to a warm pump system for a steam system water pump. Background Art

[0002] The existing steam system needs to use many multi-stage centrifugal pumps during operation. The above-mentioned centrifugal pumps are used for boiler feed water and instrument flushing water supply. Therefore, in order to achieve long-term stable operation of the steam system, it is necessary to equip spare pumps for the centrifugal pumps at each level while using multiple centrifugal pumps at each level; when the centrifugal pump in use fails and the spare pump needs to be started, it is generally necessary to warm up the spare pump, especially in winter, the use of the warm-up pump needs to be as long as an hour, which seriously affects the stable operation of the steam system; further, the existing centrifugal pumps are warmed up by opening the outlet drain valve and the exhaust valve, and the water is discharged into the sewage cooling pool and sent to the circulating water by the drain pump; when the standby pump is hot in winter, a large amount of drain is discharged into the sewage cooling pool, and the valve needs to be throttled when warming the pump, which is easy to cause internal leakage of the valve; that is, the traditional method not only wastes a large amount of deoxygenated water, but also seriously affects the service life of the valve. Utility Model Content

[0003] The utility model aims to provide a warm pump system for a steam system water pump to overcome the defects in the prior art.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A warm pump system for a steam system water pump, the warm pump system comprising a steam system water pump unit, the warm pump system also comprising a heat recovery deaerator unit,

[0006] The water pump unit includes several water pump parts, and the water pump parts include several water pump components; the water pump components include a water pump, the water outlet of the heat recovery deaerator unit is connected to the inlet of the water pump through the water pump inlet valve, a first tee is provided on the outlet pipe of the water pump, the second end of the first tee is connected to the external water supply pipe through the water pump outlet valve and the second tee, the third end of the first tee is connected to the heat recovery deaerator unit through a circulation pipe with a recirculation valve, and the water pump is connected to the third end of the second tee through the first shower valve.

[0007] The beneficial effects of the utility model are as follows: the utility model abandons the traditional warming pump form, and by setting a circulation pipeline connected to the heat recovery deaerator unit at the outlet of the water pump, and coordinating the setting of corresponding valves, it is possible to realize the warming of the standby pump while the normally open pump is running, thereby achieving the purpose of switching the standby pump at any time to ensure the long-term stable operation of the steam system; further, the warming pump of the utility model is realized by circulating deoxygenated water, so the corresponding valve is in a fully open state to avoid valve wear and waste of deoxygenated water.

[0008] Preferably, a second shower valve and a third three-way valve are sequentially provided between the water pump and the first shower valve, and a shower liquid discharge pipe with a third shower valve is provided at the third end of the third three-way valve.

[0009] Preferably, the water pump section is composed of a plurality of water pump components connected in parallel, and the water pump unit is composed of a plurality of water pump sections connected in parallel.

[0010] Preferably, the water pump unit comprises a high-pressure boiler feed water pump unit for high-pressure boiler feed water, and the high-pressure boiler feed water pump unit comprises three water pumps, of which two water pumps are normally open pumps and one water pump is a standby pump.

[0011] Preferably, the water pump unit further comprises a medium-pressure boiler feed water pump unit for medium-pressure boiler feed water, and the medium-pressure boiler feed water pump unit comprises four water pumps, of which two water pumps are normally open pumps and two water pumps are standby pumps.

[0012] Preferably, the water pump unit further comprises a low-pressure boiler feed water pump unit for low-pressure boiler feed water, and the low-pressure boiler feed water pump unit comprises two water pumps, wherein one water pump is a normally open pump and the other water pump is a standby pump.

[0013] Preferably, the water pump unit also includes a low-pressure boiler feed water pump unit for low-pressure boiler feed water, and the low-pressure boiler feed water pump unit includes three feed water pumps, of which two water pumps are normally open pumps and one water pump is a standby pump.

[0014] Preferably, the water pump unit further comprises a heat-sealed water pump section for flushing instruments in a steam system, and the heat-sealed water pump section comprises two water pumps, wherein one water pump is a normally open pump and the other water pump is a standby pump.

[0015] Preferably, the heat recovery deaerator unit includes several heat recovery deaerators arranged in parallel, the water outlets of the several heat recovery deaerators are respectively connected to the water pump inlets in several water pump parts in the water pump unit, and the several heat recovery deaerators are respectively provided with circulating water inlets, which are used to be connected to the circulating pipes of the water pumps in the water pump unit including the several water pump parts.

[0016] Preferably, there are five circulating water inlets, including a first circulating water inlet, a second circulating water inlet, a third circulating water inlet, a fourth circulating water inlet and a fifth circulating water inlet;

[0017] The first circulating water inlet is connected to the circulating pipeline of the water pump in the high-pressure boiler feed water pump section;

[0018] The second circulating water inlet is connected to the circulating pipeline of the water in the medium-pressure boiler feed water pump;

[0019] The third circulating water inlet is connected to the circulating pipeline of the water pump in the low-pressure boiler feed water pump section;

[0020] The fourth circulating water inlet is connected to the circulating pipeline of the water pump in the low-pressure boiler feed water pump section;

[0021] The fifth circulating water inlet is connected to the circulating pipeline of the water pump in the heat-sealed water pump unit.

[0022] A warming pump system for a steam system water pump is manufactured according to the above scheme. The utility model abandons the traditional technology of warming the pump when switching the standby pump and using valve throttling and discharging deoxygenated water when warming the pump. Instead, the standby pump is in a warming pump state while the normally open pump is operating normally. When the normally open pump fails, the standby pump can be switched at any time to ensure the safe operation of the steam system. Furthermore, the utility model utilizes a part of the water supply return of the normally open pump to warm the pump, and at the same time, the water of the warming pump is returned to the heat recovery deaerator to avoid the defects of the corresponding valve life being too short and the waste of deoxygenated water. It has the advantages of simple structure, reasonable design, and extending the service life of the valve and avoiding the waste of desalted water under the premise of ensuring the long-term stable operation of the steam system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model.

[0024] Figure 2 It is a structural schematic diagram of the water pump component of the utility model.

[0025] Figure 3 This is a schematic diagram of the structure of the heat recovery deaerator of the utility model.

[0026] In the figure: 1. water pump; 2. water pump inlet valve; 3. water pump outlet valve; 4. recirculation valve; 5. first shower valve; 6. second shower valve; 7. third shower valve; 8. first three-way valve; 9. second three-way valve; 10. third three-way valve; 11. high-pressure boiler; 12. medium-pressure boiler; 13. low-pressure boiler; 14. low-low-pressure boiler; 15. instrument; 16. heat recovery deaerator; 17. water outlet; 18. first circulation water inlet; 19. second circulation water inlet; 20. third circulation water inlet; 21. fourth circulation water inlet; 22. fifth circulation water inlet. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] Reference Figure 1-3As shown, a warm pump system for a steam system water pump includes a steam system water pump unit, and the warm pump system also includes a heat recovery deaerator unit. The water pump unit includes a plurality of water pump parts, and the water pump part includes a plurality of water pump components; the water pump components include a water pump 1, and the water outlet of the heat recovery deaerator unit is connected to the inlet of the water pump 1 through a water pump inlet valve 2, and a first tee 8 is provided on the outlet pipe of the water pump 1, and the second end of the first tee 8 is connected to the external water pipe through the water pump outlet valve 3 and the second tee 9, and the third end of the first tee 8 is connected to the heat recovery deaerator unit through a circulation pipe with a recirculation valve 4, and the water pump 1 is connected to the third end of the second tee 9 through a first shower valve 5. Through the above arrangement of the utility model, it is possible to realize that the normally open pump supplies deoxygenated water from the heat recovery deaerator unit to the water-demanding section. At the same time, most of the deoxygenated water is sent to the water-demanding section by the normally open pump, and a small part of the deoxygenated water enters the standby pump through the second three-way 9 and the first shower valve 5 for warming. After the warming, part of the deoxygenated water enters the inlet of the normally open pump, and the other part flows back into the heat recovery deaerator unit through the circulation pipeline with the recirculation valve 4; in the above process, the first shower valve 5 is in a fully open state to avoid wear and tear, and the whole process flow is reasonably designed, which can realize the warming of the standby pump while the normally open pump is running, so as to ensure the safe operation of the steam system, and further, can avoid the waste of deoxygenated water.

[0029] Furthermore, a second shower valve 6 and a third tee 10 are provided in sequence between the water pump 1 and the first shower valve 5, and a shower liquid discharge pipe with a third shower valve 7 is provided at the third end of the third tee 10; when the aforementioned recirculation valve 4 fails, the relevant water pump can be temporarily warmed up by traditional means to ensure the normal operation of the steam system.

[0030] Furthermore, the water pump section is composed of a plurality of water pump parts connected in parallel, and the water pump unit is composed of a plurality of water pump parts connected in parallel. The water pump unit described in the utility model is composed of a plurality of water pump parts connected in parallel, which can be specifically arranged according to actual conditions. A plurality of water pump parts can be arranged in the water pump section according to actual conditions, and each water pump part contains a water pump 1, which can be divided into a standby pump or a normally open pump.

[0031] Furthermore, the water pump unit includes a high-pressure boiler feed pump unit for supplying water to the high-pressure boiler 11 , and the high-pressure boiler feed pump unit includes three water pumps 1 , of which two water pumps 1 are normally open pumps and one water pump 1 is a standby pump.

[0032] Furthermore, the water pump unit also includes a medium-pressure boiler feed water pump unit for feeding water to the medium-pressure boiler 12. The medium-pressure boiler feed water pump unit includes four water pumps 1, of which two water pumps 1 are normally open pumps and two water pumps 1 are standby pumps.

[0033] Furthermore, the water pump unit also includes a low-pressure boiler feed water pump unit for feeding water to the low-pressure boiler 13, and the low-pressure boiler feed water pump unit includes two water pumps 1, wherein one water pump 1 is a normally open pump and the other water pump 1 is a standby pump.

[0034] Furthermore, the water pump unit also includes a low-pressure boiler feed water pump unit for feeding water to the low-pressure boiler 14, and the low-pressure boiler feed water pump unit includes three feed water pumps 1, of which two water pumps 1 are normally open pumps and one water pump 1 is a standby pump.

[0035] Furthermore, the water pump unit also includes a heat-sealed water pump part for flushing the instrument 15 in the steam system, and the heat-sealed water pump part includes two water pumps 1, wherein one water pump 1 is a normally open pump and the other water pump 1 is a standby pump. The instrument 15 described in the utility model includes conventional instrument equipment such as the liquid level and flow meter of the gasifier.

[0036] Furthermore, the heat recovery deaerator unit includes a plurality of heat recovery deaerators 16 arranged in parallel, the water outlets 17 of the plurality of heat recovery deaerators 16 are respectively connected to the inlet of the water pump 1 in the plurality of water pump parts in the water pump unit, and the plurality of heat recovery deaerators 16 are respectively provided with circulating water inlets, which are used to be connected to the circulating pipes of the water pump 1 in the plurality of water pump parts of the water pump unit. The above arrangement enables the heat recovery deaerator 16 to supply desalted water to the water pump unit, and at the same time, when the standby pump warms the pump, the desalted water is refluxed into the heat recovery deaerator 16, thereby achieving the reuse of the desalted water while warming the pump.

[0037] Furthermore, there are five circulating water inlets, including the first circulating water inlet 18, the second circulating water inlet 19, the third circulating water inlet 20, the fourth circulating water inlet 21 and the fifth circulating water inlet 22; the first circulating water inlet 18 is connected to the circulating pipeline of the water pump 1 in the high-pressure boiler feed water pump unit; the second circulating water inlet 19 is connected to the circulating pipeline of the water pump 1 in the medium-pressure boiler feed water pump unit; the third circulating water inlet 20 is connected to the circulating pipeline of the water pump 1 in the low-pressure boiler feed water pump unit; the fourth circulating water inlet 21 is connected to the circulating pipeline of the water pump 1 in the low-pressure boiler feed water pump unit; the fifth circulating water inlet 22 is connected to the circulating pipeline of the water pump 1 in the heat-sealed water pump unit. The above-mentioned arrangement can make the water flow of the warm pump evenly return to each recovery deaerator 16, avoiding the defect of excessive concentration of refluxed desalted water, which causes unstable system operation.

[0038] The working principle of the utility model is as follows: the utility model is different from the traditional warming pump type. When the normally open pump is running and the standby pump is stopped, the opening of the corresponding valve is in a fully open state to avoid problems affecting the service life of the valve, which will not be described in detail below; taking the high-pressure boiler feed water pump part used for feeding water to the high-pressure boiler 11 as an example, the principles of its normally open pump and standby pump are explained, and the operation of the remaining water pump parts is similar to this and will not be described in detail; specifically, the high-pressure boiler feed water pump part includes three water pumps 1, of which two water pumps 1 are normally open pumps and one water pump 1 is a standby pump; the water pump inlet valve 2 and the water pump outlet valve 3 in the water pump part where the normally open pump is located are in an open state, and the heat recovery deaerator 16 The deoxygenated water in the water outlet 17 is fed to the high-pressure boiler 11 through the normally open pump, and the first pilot valve 5, the second pilot valve 6, the third pilot valve 7 and the recirculation valve 4 are in a closed state; in the water pump parts corresponding to the standby pump at this time, the water pump inlet valve 2, the first pilot valve 5, the second pilot valve 6 and the recirculation valve 4 are in an open state, and the third pilot valve 7 and the water pump outlet valve 3 are in a closed state. At this time, the pressurized deoxygenated water in the normally open pump enters the standby pump through the first pilot valve 5 and the second pilot valve 6 for warming the pump. The deoxygenated water after warming the pump is divided into two parts, one part enters the normally open pump through the water pump inlet valve 2 to feed water to the high-pressure boiler 11, and the other part enters the heat recovery deaerator 16 through the recirculation valve 4 to complete the cycle. The above process has the advantages of reasonable design, extending the service life of the valve and avoiding waste of desalted water under the premise of ensuring long-term stable operation of the steam system.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A warm pump system for a steam system water pump, the warm pump system comprising a steam system water pump unit, characterized in that: The warm pump system also includes a heat recovery deaerator unit. The water pump unit comprises a plurality of water pump parts, and the water pump parts comprise a plurality of water pump components; the water pump components comprise a water pump (1); the water outlet of the heat recovery deaerator unit is connected to the inlet of the water pump (1) through a water pump inlet valve (2); a first tee (8) is provided on the outlet pipeline of the water pump (1); the second end of the first tee (8) is connected to the external water delivery pipeline through the water pump outlet valve (3) and the second tee (9); the third end of the first tee (8) is connected to the heat recovery deaerator unit through a circulation pipeline with a recirculation valve (4); the water pump (1) is connected to the third end of the second tee (9) through a first shower valve (5).

2. A warm pump system for a steam system water pump according to claim 1, characterized in that: A second shower valve (6) and a third three-way connection (10) are arranged in sequence between the water pump (1) and the first shower valve (5); a shower liquid discharge pipe with a third shower valve (7) is arranged at the third end of the third three-way connection (10).

3. A warm pump system for a steam system water pump according to claim 1 or 2, characterized in that: The water pump part is composed of a plurality of water pump parts connected in parallel, and the water pump unit is composed of a plurality of water pump parts connected in parallel.

4. A warm pump system for a steam system water pump according to claim 1 or 2, characterized in that: The water pump unit comprises a high-pressure boiler feed water pump unit for supplying water to a high-pressure boiler (11), the high-pressure boiler feed water pump unit comprising three water pumps (1), two of which are normally open pumps and one water pump (1) is a standby pump.

5. A warm pump system for a steam system water pump according to claim 1 or 2, characterized in that: The water pump unit also includes a medium-pressure boiler feed water pump unit for supplying water to the medium-pressure boiler (12), the medium-pressure boiler feed water pump unit including four water pumps (1), of which two water pumps (1) are normally open pumps and two water pumps (1) are standby pumps.

6. A warm pump system for a steam system water pump according to claim 1 or 2, characterized in that: The water pump unit also includes a low-pressure boiler feed water pump unit for supplying water to the low-pressure boiler (13), the low-pressure boiler feed water pump unit including two water pumps (1), wherein one water pump (1) is a normally open pump and the other water pump (1) is a standby pump.

7. A warm pump system for a steam system water pump according to claim 1 or 2, characterized in that: The water pump unit also includes a low-pressure boiler feed water pump unit for feeding water to a low-pressure boiler (14), the low-pressure boiler feed water pump unit including three feed water pumps (1), of which two water pumps (1) are normally open pumps and one water pump (1) is a standby pump.

8. A warm pump system for a steam system water pump according to claim 1 or 2, characterized in that: The water pump unit also includes a heat-sealed water pump section for flushing instruments (15) in a steam system, the heat-sealed water pump section including two water pumps (1), one of which is a normally open pump and the other is a standby pump.

9. A warm pump system for a steam system water pump according to claim 1, characterized in that: The heat recovery deaerator unit comprises a plurality of heat recovery deaerators (16) arranged in parallel, the water outlets (17) of the plurality of heat recovery deaerators (16) are respectively connected to the inlets of the water pumps (1) in the plurality of water pump sections in the water pump unit, and the plurality of heat recovery deaerators (16) are respectively provided with circulating water inlets, which are used to be connected to the circulating pipes of the water pumps (1) in the plurality of water pump sections in the water pump unit.

10. A warm pump system for a steam system water pump according to claim 9, characterized in that: There are five circulating water inlets, including a first circulating water inlet (18), a second circulating water inlet (19), a third circulating water inlet (20), a fourth circulating water inlet (21) and a fifth circulating water inlet (22); The first circulating water inlet (18) is connected to the circulating pipeline of the water pump (1) in the high-pressure boiler feed water pump unit; The second circulating water inlet (19) is connected to the circulating pipeline of the water pump (1) in the medium-pressure boiler feed water pump unit; The third circulating water inlet (20) is connected to the circulating pipeline of the water pump (1) in the low-pressure boiler feed water pump unit; The fourth circulating water inlet (21) is connected to the circulating pipeline of the water pump (1) in the low-pressure boiler feed water pump section; The fifth circulating water inlet (22) is connected to the circulating pipeline of the water pump (1) in the heat-sealed water pump unit.

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