CN217602723U - Cooling system for boiler feed pump - Google Patents

Abstract

The present disclosure relates to a cooling system for a boiler feedwater pump, the cooling system comprising: a cooling water supply device, a first circulation flow path, and a second circulation flow path; the first circulation flow path comprises a first water supply pipeline communicated between a first liquid outlet of the cooling water supply device and a liquid inlet of the corresponding end cover cavity, and a first water return pipeline communicated between a first liquid inlet of the cooling water supply device and a liquid outlet of the corresponding end cover cavity; the second circulation flow path comprises a cooler provided with a first channel for flowing cooling water and a second channel for flowing sealing water, the first channel is communicated with the cooling water supply device, and the second channel is communicated with the corresponding sealing water chamber, so that the cooling water and the sealing water exchange heat through the cooler, and the problem that the sealing water temperature of the boiler feed pump is high in the related art, and therefore the boiler feed pump has certain potential safety hazards can be solved.

Description

Cooling system for boiler feed pump

Technical Field

The present disclosure relates to the field of boiler cooling system technology, and in particular, to a cooling system for a boiler feed pump.

Background

The boiler feed pump of the thermal power plant plays a key role in a boiler feed system, and the operation reliability of the boiler feed pump directly influences the safe and economic operation of the whole thermal generator set. In the correlation technique, the water feed pump adopts mechanical seal's sealed water to carry out cooling between two sealed faces of sound ring, but because boiler feed water temperature is higher, mechanical seal's sealed temperature rise along with it, can not be fine play to boiler feed pump cooling effect, and then lead to the water feed pump tripping operation, cause very big safety risk and hidden danger to thermal generator set.

SUMMERY OF THE UTILITY MODEL

The purpose of the present disclosure is to provide a cooling system for a boiler feed pump, which can solve the problem that the boiler feed pump has certain potential safety hazard due to the fact that the temperature of sealing water of the boiler feed pump is high in the related art.

In order to achieve the above object, the present disclosure provides a cooling system for a boiler feed water pump, the feed water pump including a driving end connected to a steam turbine and a driven end opposite to the driving end, the driving end and the driven end each being provided with an end cover chamber and a sealing water chamber, the cooling system comprising: a cooling water supply device; the first circulating flow paths are two groups and correspond to the two end cover cavities one by one, and each first circulating flow path comprises a first water supply pipeline and a first water return pipeline, wherein the first water supply pipeline is used for communicating a first liquid outlet of the cooling water supply device with a corresponding liquid inlet of the end cover cavity, and the first water return pipeline is used for communicating a first liquid inlet of the cooling water supply device with a corresponding liquid outlet of the end cover cavity; and the second circulation flow path, the quantity of second circulation flow path be two sets ofly and with two the sealing water cavity one-to-one, the second circulation flow path includes the cooler, the cooler has the first passageway that is used for supplying cooling water to flow and is used for supplying sealing water flowing second passageway, so that cooling water with sealing water passes through the cooler carries out the heat exchange, the inlet of first passageway communicate in cooling water feeding device's second liquid outlet, the liquid outlet of first passageway communicate in cooling water feeding device's second inlet, the liquid outlet of second passageway is used for communicating with the inlet of the sealing water cavity that corresponds, the inlet of second passageway is used for communicating with the liquid outlet of the sealing water cavity that corresponds.

Optionally, the cooler includes an outer cylinder and an inner cylinder located inside the outer cylinder, the outer cylinder and the inner cylinder are arranged coaxially to form the first channel between an inner wall of the outer cylinder and an outer wall of the inner cylinder, the second channel is formed inside the inner cylinder, and a flow direction of the cooling water in the first channel is opposite to a flow direction of the sealing water in the second channel.

Optionally, the inlet of first passageway pass through the second water supply pipe communicate in cooling water feeding device's second liquid outlet, the liquid outlet of first passageway pass through the second return water pipeline communicate in cooling water feeding device's second inlet, the liquid outlet of second passageway passes through the third water supply pipe and communicates with the inlet of the sealed water cavity that corresponds, the inlet of second passageway passes through the third return water pipeline and communicates with the liquid outlet of the sealed water cavity that corresponds.

Optionally, two of the first water supply pipelines in the two first circulation flow paths are communicated with a first liquid outlet of the cooling water supply device through a first water supply header, and two of the first water return pipelines in the two first circulation flow paths are communicated with a first liquid inlet of the cooling water supply device through a first water return header; and/or two second water supply pipelines in the two second circulating flow paths are communicated with a second liquid outlet of the cooling water supply device through a second water supply main pipe, and two second water return pipelines in the two second circulating flow paths are communicated with a second liquid inlet of the cooling water supply device through a second water return main pipe.

Optionally, the cooling system further includes a first discharge pipeline, one end of the first discharge pipeline is respectively communicated with the first water return main and the second water return main, the other end of the first discharge pipeline is used for being communicated with the water storage tank, and a first control valve is arranged on the first discharge pipeline.

Optionally, at least one of the first water supply pipeline, the second water supply pipeline, the first water supply main pipe and the second water supply main pipe is provided with a pressure gauge, and at least one of the first water return pipeline, the second water return pipeline, the first water return main pipe and the second water return main pipe is provided with an observation window.

Optionally, the second circulation flow path further includes a second bleed line communicated with the second passage, and a second control valve is disposed on the second bleed line.

Optionally, the third water return pipeline includes a first branch and a second branch that are connected in parallel, and the first branch and the second branch are both provided with a magnetic filter.

Optionally, a temperature measuring element is further disposed on the third water return pipeline.

Optionally, the first water supply pipeline, the second water supply pipeline, the third water supply pipeline, the first water supply main, the second water supply main, the first water return pipeline, the second water return pipeline, the third water return pipeline, the first water return main, and the second water return main are all configured as metal hoses.

Through the technical scheme, the utility model provides a cooling system for boiler feed pump that this disclosure provided, this cooling system communicates the inlet of the end cover cavity of feed pump in the first liquid outlet of cooling water feeding device through first water supply line, further communicate the liquid outlet of end cover cavity in the first inlet of cooling water feeding device through first return water line, thus, cooling water among the cooling water feeding device will flow through to the end cover cavity internal cooling back via first water supply line, flow back to among the cooling water feeding device via first return water line again, in order to realize the cooling to the end cover cavity of feed pump, and communicate the liquid outlet of the sealed water cavity of feed pump in the inlet of the second passageway of cooler, further communicate the inlet of the sealed water cavity of feed pump in the liquid outlet of the second passageway of cooler, communicate the inlet of the first passageway of this cooler in the second liquid outlet of cooling water feeding device simultaneously, further communicate the liquid outlet of the first passageway of this cooler in the second passageway of cooling water feeding device, thus, can make the inlet of the first passageway of cooling water feeding device communicate the sealed water feeding device in the second passageway with the cooling water feeding device and realize the stable cooling water inlet of sealed water feeding device, thereby whole cooling water feeding device and the sealed water feeding device, thereby, realize the stable cooling water inlet of sealed water feeding device and the sealed water feeding device. Therefore, the cooling system for boiler feed pump that this disclosure provided can solve among the correlation technique thereby the sealed water temperature of boiler feed pump is higher leads to boiler feed pump to have the problem of certain potential safety hazard, and has that the suitability is good, stability is strong and cooling efficiency is high advantage.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure, but do not constitute a limitation of the disclosure. In the drawings:

FIG. 1 is a schematic block diagram of a cooling system for a boiler feedwater pump provided in an exemplary embodiment of the present disclosure;

FIG. 2 is a schematic diagram of a chiller in a cooling system for a boiler feedwater pump provided in an exemplary embodiment of the present disclosure.

Description of the reference numerals

1-a driving end; 2-a driven end; 3-an end cap chamber; 4-sealing the water chamber; 5-cooling water supply means; 6-a first water supply line; 7-a first water return line; 8-a cooler; 810-a first channel; 820-a second channel; 830-outer barrel; 840-inner cylinder; 9-a second water supply line; 10-a second water return pipeline; 11-a third water supply line; 12-a third water return pipeline; 1210-first branch; 1220-a second branch; 13-a first water main; 14-a first return water main; 15-a second water main; 16-a second water return main; 17-a first bleed line; 18-a water storage tank; 19-a first control valve; 20-pressure gauge; 21-an observation window; 22-a second bleed line; 23-a second control valve; 24-a magnetic filter; 25-a temperature measuring element; 26-a feed pump; 27-a steam turbine; 28-stop valve.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, "inner and outer" refer to inner and outer relative to the contour of the component or structure itself. In addition, it should be noted that terms such as "first", "second", and the like are used for distinguishing one element from another, and have no order or importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements.

According to the cooling system for the boiler feed water pump provided by the present disclosure, referring to fig. 1 and 2, the feed water pump 26 includes a driving end 1 connected with a steam turbine 27 and a driven end 2 opposite to the driving end 1, the driving end 1 and the driven end 2 are both provided with an end cover chamber 3 and a sealing water chamber 4; the cooling system includes: a cooling water supply device 5, a first circulation flow path, and a second circulation flow path; the number of the first circulation flow paths is two, the first circulation flow paths correspond to the two end cover cavities 3 one by one, and each first circulation flow path comprises a first water supply pipeline 6 and a first water return pipeline 7, wherein the first water supply pipeline 6 is used for being communicated between a first liquid outlet of the cooling water supply device 5 and a liquid inlet of the corresponding end cover cavity 3, and the first water return pipeline 7 is used for being communicated between a first liquid inlet of the cooling water supply device 5 and a liquid outlet of the corresponding end cover cavity 3; the number of the second circulation flow paths is two groups and is in one-to-one correspondence with the two sealed water chambers 4, the second circulation flow paths include a cooler 8, the cooler 8 is provided with a first channel 810 for cooling water to flow and a second channel 820 for sealing water to flow, so that the cooling water and the sealing water exchange heat through the cooler 8, a liquid inlet of the first channel 810 is communicated with a second liquid outlet of the cooling water supply device 5, a liquid outlet of the first channel 810 is communicated with a second liquid inlet of the cooling water supply device 5, a liquid outlet of the second channel 820 is communicated with a liquid inlet of the corresponding sealed water chamber 4, and a liquid inlet of the second channel 820 is communicated with a liquid outlet of the corresponding sealed water chamber 4.

By the above technical scheme, that is, the cooling system for a boiler feed water pump provided by the present disclosure communicates a liquid inlet of an end cover cavity 3 of a feed water pump 26 with a first liquid outlet of a cooling water supply device 5 through a first water supply pipeline 6, further communicates a liquid outlet of the end cover cavity 3 with a first liquid inlet of the cooling water supply device 5 through a first water return pipeline 7, so that cooling water in the cooling water supply device 5 flows through the end cover cavity 3 via the first water supply pipeline 6 to be cooled and cooled, and then flows back to the cooling water supply device 5 via the first water return pipeline 7, so as to realize cooling of the end cover cavity 3 of the feed water pump 26, and communicates a liquid outlet of a sealed water cavity 4 of the feed water pump 26 with a liquid inlet of a second channel 820 of a cooler 8, further communicates a liquid inlet of the sealed water cavity 4 of the feed water pump 26 with a liquid outlet of the second channel 820 of the cooler 8, and simultaneously communicates a liquid inlet of the first channel 810 of the cooler 8 with a liquid outlet of the second channel 820 of the cooler 8 with a second channel 820, thereby realizing stable communication of the cooling water in the sealed water supply device 5, and a stable cooling water flow into the sealed water supply device 5 via the sealed water supply device 8, thereby realizing stable cooling water supply device 4 and a stable cooling water flow into a heat exchange system, thereby realizing the sealed water supply device 8, thereby realizing the cooling water supply device 8. Therefore, the cooling system for boiler feed pump that this disclosure provided can solve among the correlation technique thereby the sealed water temperature of boiler feed pump is higher leads to boiler feed pump to have the problem of certain potential safety hazard, and has that the suitability is good, stability is strong and cooling efficiency is high advantage.

In conclusion, the cooling system provided by the present disclosure can cool down the end cover cavity 3 and the sealing water cavity 4 of the driving end 1 and the driven end 2 of the feed water pump 26 at the same time, and the cooling water supply device 5 provides cooling water to the end cover cavity 3 through the first liquid outlet on one way, and provides cooling water to the cooler 8 through the second liquid outlet on the other way to cool the sealing water flowing through the second channel 820 of the cooler 8, so that the occurrence of the water robbing phenomenon in the two cavities due to the difference of the internal water pressure of the two cavities can be avoided, and the better cooling effect of the cooling system is ensured.

The cooling water may be industrial water, or may be other cooling media such as municipal water or other cooling media, and the disclosure is not limited in this respect.

The cooler 8 may be configured in any suitable manner according to practical application requirements, for example, in some embodiments, as shown in fig. 1 and 2, the cooler 8 may include an outer tub 830 and an inner tub 840 located inside the outer tub 830, and the outer tub 830 and the inner tub 840 are coaxially arranged to form a first passage 810 between an inner wall of the outer tub 830 and an outer wall of the inner tub 840, and a second passage 820 is formed inside the inner tub 840, so that cooling water flowing through the first passage 810 can exchange heat with sealing water flowing through the second passage 820. Wherein, the flow direction of the cooling water in the first channel 810 is opposite to the flow direction of the sealing water in the second channel 820, i.e. a counter-flow arrangement is adopted, so as to improve the cooling efficiency of the cooler 8. In addition, it should be noted that fig. 1 and fig. 2 each exemplarily show the flow directions of the cooling water and the sealing water, and the arrows point to, i.e., are the flow directions of the respective cooling water and the sealing water.

In some embodiments, referring to fig. 1 and 2, the liquid inlet of the first channel 810 may be communicated with the second liquid outlet of the cooling water supply device 5 through a second water supply line 9, the liquid outlet of the first channel 810 is communicated with the second liquid inlet of the cooling water supply device 5 through a second water return line 10, so that the cooling water in the cooling water supply device 5 can be guided into the first channel 810 through the second water supply line 9 and returned to the cooling water supply device 5 through the second water return line 10, the liquid outlet of the second channel 820 is communicated with the corresponding liquid inlet of the sealed water chamber 4 through a third water supply line 11, and the liquid inlet of the second channel 820 is communicated with the corresponding liquid outlet of the sealed water chamber 4 through a third water return line 12, so that the sealed water in the sealed water chamber 4 can be guided into the second channel 820 through the third water supply line 11 and returned to the sealed water chamber 4 through the third water return line 12, so that the cooling water in the sealed water chamber 4 can be cooled by the cooling water in the cooling water supply device 5, and the stable working feed pump 26 can be ensured.

In addition, in some embodiments, referring to fig. 1 and 2, two of the first water supply lines 6 of the two first circulation flow paths may be communicated with the first liquid outlet of the cooling water supply device 5 through a first water supply header 13, and two of the first water return lines 7 of the two first circulation flow paths are communicated with the first liquid inlet of the cooling water supply device 5 through a first water return header 14; and/or two second water supply pipelines 9 in the two second circulation flow paths are communicated with a second liquid outlet of the cooling water supply device 5 through a second water supply header pipe 15, and two second water return pipelines 10 in the two second circulation flow paths are communicated with a second liquid inlet of the cooling water supply device 5 through a second water return header pipe 16, so that the cooling can be simultaneously performed on the end cover cavity 3 of the driving end 1 of the water supply pump 26, the end cover cavity 3 of the sealed water cavity 4 and the driven end 2 and the sealed water cavity 4 through the cooling water supply device 5, and the stability is good and the cooling efficiency is high. Of course, in some embodiments, not shown in the drawings, the two first water supply lines 6 of the two first circulation flow paths and the two second water supply lines 9 of the two second circulation flow paths may be respectively communicated with the liquid outlet of the cooling water supply device 5, and the two first water return lines 7 of the two first circulation flow paths and the two second water return lines 10 of the two second circulation flow paths may be respectively communicated with the liquid inlet of the cooling water supply device 5, and the disclosure is not limited thereto.

In some embodiments, not shown, the cooling water supply device 5 may be, for example, a water storage device, and is provided with a first liquid outlet communicated with the first water supply header 13, a second liquid outlet communicated with the second water supply header 15, a first liquid inlet communicated with the first water return header 14, and a second liquid inlet communicated with the second water return header 16. In addition, a device, such as a radiator or a heat exchanger, capable of cooling and cooling the cooling water returning to the cooling water supply device 5 in the pipeline may be further disposed on the first water return manifold 14 and the second water return manifold 16, so as to further enhance the cooling efficiency of the cooling system.

In addition, in some embodiments, referring to fig. 1 and fig. 2, the cooling system may further include a first discharge line 17, one end of the first discharge line 17 is respectively connected to the first water return manifold 14 and the second water return manifold 16, and the other end of the first discharge line 17 is used for being connected to the water storage tank 18, so that when the temperature of the cooling water in the first water return manifold 14 and the second water return manifold 16 is high, for example, when heat dissipation of a radiator or a heat exchanger is not timely or the heat dissipation effect is poor, a certain amount of cooling water after heat exchange can be discharged into the water storage tank 18, and thus high cooling efficiency in the cooling system can be ensured. And, still be provided with first control valve 19 on the first bleeder line 17 to can be through opening and close of this first control valve 19 and then whether operable control first bleeder line 17 discharges the cooling water to the aqua storage tank 18 after the heat exchange in, the nature controlled is good and simple structure, and the manufacturing cost of being convenient for is lower. The first control valve 19 may be, for example, an electric valve or a manual valve, which is not limited in this disclosure.

In addition, in order to facilitate the operator to monitor the cooling effect of the cooling system in real time, in some embodiments, referring to fig. 1 and fig. 2, for example, a temperature measuring element 25 may be further disposed on the third water supply line 11, so that the operator can detect whether the temperature of the sealing water is kept in a normal temperature range through the temperature measuring element 25, if the temperature value of the sealing water is no longer within the normal temperature range, for example, when the heat dissipation of a radiator or a heat exchanger is not in time or the heat dissipation effect is poor, the operator may open the first control valve 19 so as to enable the cooling water to be sent to the water storage tank 18 through the heat exchange of the portion discharged from the first discharge line 17, thereby reducing the temperature of the cooling water in the cooling water supply device 5, and facilitating to ensure high cooling efficiency of the cooling system. Among them, the temperature measuring element 25 may be configured as an element such as a temperature sensor, etc., through which the temperature of the sealing water is fed back, and the present disclosure is not particularly limited thereto.

In some embodiments, as shown in fig. 1 and fig. 2, at least one of the first water supply pipe 6, the second water supply pipe 9, the first water supply main 13, and the second water supply main 15 may be provided with a pressure gauge 20 to monitor whether the pressure of cooling water in each water supply pipe is normal in real time, and at least one of the first water return pipe 7, the second water return pipe 10, the first water return main 14, and the second water return main 16 may be provided with an observation window 21 to further observe whether the water return condition in each water return pipe is normal through the observation window 21, so that an operator may make corresponding adjustment according to the actual operating condition of the cooling system to facilitate ensuring high cooling efficiency of the cooling system.

In addition, in some embodiments, referring to fig. 1 and fig. 2, the second circulation flow path may further include a second discharge line 22 communicated with the second passage 820, so that air in the pipe of the seal water chamber 4 can be discharged when, for example, the cooling system is stopped for a long time or the unit is restarted after maintenance, through the second discharge line 22, so as to ensure that seal water can efficiently cool the moving and static rings of the feed water pump 26, and the second discharge line 22 is provided with a second control valve 23, so that whether the second discharge line 22 discharges gas or not can be controlled by opening and closing the second control valve 23, which is good in operability. The second control valve 23 may be, for example, an electric exhaust valve or a manual exhaust valve, which is not particularly limited in the present disclosure. In addition, the second discharge line 22 may also be connected to, for example, the third water supply line 11 or the third water return line 12, so as to discharge the gas in the seal water chamber 4 to the inside of the system, and the disclosure is not limited in particular.

In addition, in some embodiments, referring to fig. 1 and 2, the third water return pipeline 12 may include a first branch 1210 and a second branch 1220 connected in parallel with each other, and a magnetic filter 24 is disposed on each of the first branch 1210 and the second branch 1220, so that the sealing water can be filtered by the magnetic filter 24, and ferromagnetic impurities mixed in the sealing water can be removed, so as to facilitate reducing the content of the ferromagnetic impurities in the sealing water.

In some embodiments, as shown in fig. 1 and fig. 2, the first water supply pipeline 6, the second water supply pipeline 9, the third water supply pipeline 11, the first water supply header 13, the second water supply header 15, the first water return pipeline 7, the second water return pipeline 10, the third water return pipeline 12, the first water return header 14, and the second water return header 16 are all configured as metal hoses, so that the disassembly and assembly are convenient, and the development of maintenance work is facilitated. Wherein, each pipeline can also be provided with the driving pump (not shown in the figure) to do benefit to the high-efficient flow of cooling water or sealing water, guarantee the higher cooling efficiency of cooling system. In addition, each pipeline can also be provided with stop valve 28 to can realize opening or closing of corresponding pipeline through opening and close of stop valve 28, the maneuverability is good.

Based on the above embodiments, the present disclosure exemplarily describes an operation process of the cooling system, which is shown in fig. 1 and fig. 2, and specifically follows: under the guide of the driving pump, one path of cooling water flows from a first liquid outlet of the cooling water supply device 5, a first water supply header pipe 13, two groups of first water supply pipelines 6, corresponding liquid inlets of the end cover cavities 3, liquid outlets of the end cover cavities 3, two groups of first water return pipelines 7, a first water return header pipe 14 and a first liquid inlet of the cooling water supply device 5; the other path of the cooling water flows from a second liquid outlet of the cooling water supply device 5, a second water supply manifold 15, two groups of second water supply pipelines 9, corresponding liquid inlets of the first channels 810 of the coolers 8, liquid outlets of the first channels 810 of the coolers 8, two groups of second water return pipelines 10, a second water return manifold 16 and a second liquid inlet of the cooling water supply device 5; the sealing water is guided by the driving pump to flow from the liquid outlet of the sealing water chamber 4, the third water return pipeline 12, the magnetic filter 24, the liquid inlet of the second channel 820 of the cooler 8, the liquid outlet of the second channel 820 of the cooler 8, the third water supply pipeline 11, the temperature measuring element 25 and the liquid inlet of the sealing water chamber 4. In addition, when the sealing water supply device is used for the first time or when the stop valve 28 corresponding to the pipeline is opened after the maintenance of the unit, the second control valve 23 on the second discharge pipeline 22 needs to be opened, so that the gas in the pipeline can be discharged, and the sealing water can flow efficiently. In addition, when the temperature of the cooling water inside the pipeline is high, for example, when the heat dissipation of a radiator or a heat exchanger is not timely or the heat dissipation effect is poor, the operator can operate to open the first control valve 19, so that the heat-exchanged cooling water in the first water return manifold 14 and the second water return manifold 16 can flow into the first discharge pipeline 17, the first control valve 19 and the water storage tank 18, the temperature of the cooling water in the cooling water supply device 5 can be reduced, and the high cooling efficiency of the cooling system can be ensured.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure as long as it does not depart from the gist of the present disclosure.

Claims (10)

1. A cooling system for a boiler feed water pump, the feed water pump including a drive end connected to a steam turbine and a driven end opposite the drive end, the drive end and the driven end each being provided with an end cap cavity and a sealing water cavity, the cooling system comprising:

a cooling water supply device;

the first circulating flow paths comprise first water supply pipelines used for being communicated between a first liquid outlet of the cooling water supply device and a corresponding liquid inlet of the end cover cavity, and first water return pipelines used for being communicated between a first liquid inlet of the cooling water supply device and a corresponding liquid outlet of the end cover cavity; and

the second circulation flow path, the quantity of second circulation flow path be two sets of and with two sealing water cavity one-to-one, the second circulation flow path includes the cooler, the cooler has the first passageway that is used for supplying cooling water to flow and is used for supplying sealing water flowing second passageway, so that cooling water with sealing water passes through the cooler carries out the heat exchange, the inlet of first passageway communicate in cooling water feeding device's second liquid outlet, the liquid outlet of first passageway communicate in cooling water feeding device's second inlet, the liquid outlet of second passageway is used for communicating with the inlet of corresponding sealing water cavity, the inlet of second passageway is used for communicating with the liquid outlet of corresponding sealing water cavity.

2. The cooling system for a boiler feed water pump according to claim 1, wherein the cooler includes an outer tub and an inner tub located inside the outer tub, the outer tub is arranged coaxially with the inner tub to form the first passage between an inner wall of the outer tub and an outer wall of the inner tub, the inner tub is formed inside with the second passage, and a flow direction of the cooling water in the first passage is opposite to a flow direction of the seal water in the second passage.

3. The cooling system for a boiler feed water pump as claimed in claim 1 or 2, wherein the liquid inlet of the first channel is communicated with the second liquid outlet of the cooling water supply device through a second water supply pipeline, the liquid outlet of the first channel is communicated with the second liquid inlet of the cooling water supply device through a second water return pipeline, the liquid outlet of the second channel is communicated with the liquid inlet of the corresponding sealed water chamber through a third water supply pipeline, and the liquid inlet of the second channel is communicated with the liquid outlet of the corresponding sealed water chamber through a third water return pipeline.

4. The cooling system for a boiler feed water pump as set forth in claim 3, wherein two of said first water supply lines of said two first circulation flow paths are communicated with a first liquid outlet of said cooling water supply means through a first water supply header, and two of said first water return lines of said two first circulation flow paths are communicated with a first liquid inlet of said cooling water supply means through a first water return header; and/or the presence of a gas in the gas,

two second water supply pipelines in the two second circulating flow paths are communicated with a second liquid outlet of the cooling water supply device through a second water supply main pipe, and two second water return pipelines in the two second circulating flow paths are communicated with a second liquid inlet of the cooling water supply device through a second water return main pipe.

5. The cooling system for the boiler feed water pump as claimed in claim 4, wherein the cooling system further comprises a first drain line, one end of the first drain line is respectively communicated with the first water return manifold and the second water return manifold, the other end of the first drain line is communicated with a water storage tank, and a first control valve is arranged on the first drain line.

6. The cooling system for a boiler feed-water pump according to claim 4, wherein at least one of the first water supply line, the second water supply line, the first water supply manifold, and the second water supply manifold is provided with a pressure gauge, and at least one of the first water return line, the second water return line, the first water return manifold, and the second water return manifold is provided with an observation window.

7. The cooling system for a boiler feedwater pump of claim 3, wherein the second circulation flow path further comprises a second bleed line in communication with the second passage, and a second control valve is disposed on the second bleed line.

8. The cooling system for a boiler feed water pump according to claim 3, wherein the third water return line includes a first branch and a second branch connected in parallel with each other, and a magnetic filter is provided on each of the first branch and the second branch.

9. The cooling system for a boiler feed water pump as set forth in claim 3, wherein a temperature measuring element is further provided on said third return water line.

10. The cooling system for a boiler feed-water pump of claim 4, wherein the first water supply line, the second water supply line, the third water supply line, the first water supply manifold, the second water supply manifold, the first water return line, the second water return line, the third water return line, the first water return manifold, and the second water return manifold are each configured as a metal hose.

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