Cooling system and turboset

Abstract

The utility model relates to a cooling system and a steam turbine unit, the cooling system comprises an auxiliary machine cooling water system and a closed cold water system, the water outlet end of the auxiliary machine cooling water system is connected with the water inlet end of the closed cold water system, the water outlet end of the closed cold water system is connected with the water return end of auxiliary machine cooling water, and the cooling system further comprises a peak cooling system. The water outlet end of the peak cooling system is connected to the water outlet end of the auxiliary machine cooling water system through a first pipeline, the auxiliary machine cooling water system and the peak cooling system can be connected through the cooling system, and closed cold water can be cooled through cooling water in the auxiliary machine cooling water system and cooling water in the peak cooling system at the same time. And safe operation of the unit is ensured.

Description

Technical Field

[0001] The present disclosure relates to the technical field of steam turbine equipment cooling, and in particular to a cooling system and a steam turbine unit. Background Art

[0002] In the related art, the closed cooling water system usually needs to be cooled by cold water from the auxiliary machine cooling water system, and then circulated through the pipes inside the closed cooling water system to the closed cooling water users for use. However, since the pipes of the auxiliary machine cooling water system are usually buried underground and difficult to maintain, the pipes are prone to aging or corrosion after long-term operation, which may cause the pipes to leak. After the pipes of the auxiliary machine cooling water system leak, the cooling effect on the closed cooling water system will also be reduced, causing the water temperature of the closed cooling water to continue to rise, which not only affects the use of the closed cooling water users, but also affects the safe operation of the unit. In severe cases, it may even require shutdown for treatment. Utility Model Content

[0003] The purpose of the present disclosure is to provide a cooling system and a steam turbine unit, which can connect the auxiliary machine cooling water system and the peak cooling system, and can cool down the closed cooling water simultaneously by the cooling water in the auxiliary machine cooling water system and the peak cooling system to ensure the safe operation of the unit, so as to at least partially solve the above-mentioned technical problems.

[0004] In order to achieve the above-mentioned objectives, the first aspect of the present disclosure provides a cooling system, including an auxiliary machine cooling water system and a closed cooling water system, wherein a water outlet of the auxiliary machine cooling water system is connected to a water inlet of the closed cooling water system, and a water outlet of the closed cooling water system is connected to a water return of the auxiliary machine cooling water system, and the cooling system also includes a peak cooling system, and a water outlet of the peak cooling system is connected to a water outlet of the auxiliary machine cooling water system through a first pipeline.

[0005] Optionally, the cooling system further includes a second pipeline, and the second pipeline is used to connect a return water end of the peak cooling system and a return water end of the auxiliary machine cooling water system.

[0006] Optionally, the first pipeline includes: a first mother pipeline, one end of which is connected to the water outlet of the auxiliary machine cooling water system; and a first sub-pipeline, which is multiple and connected in parallel to the first mother pipeline, and the other end of the first sub-pipeline is connected to the water outlet of the peak cooling system.

[0007] Optionally, a first regulating valve is provided on the first main pipeline, and a second regulating valve is provided on the first sub-pipeline.

[0008] Optionally, the second pipeline includes: a second main pipeline, one end of which is connected to the return end of the auxiliary machine cooling water system; and a second sub-pipeline, which is multiple and connected in parallel to the second main pipeline, and the other end of the second sub-pipeline is connected to the return end of the peak cooling system.

[0009] Optionally, a third regulating valve is provided on the second main pipeline, and a fourth regulating valve is provided on the second sub-pipeline.

[0010] Optionally, the peak cooling system includes a circulating water absorption pool and a plurality of cooling tower fans connected to the circulating water absorption pool, and the circulating water absorption pool is connected to the water outlet of the auxiliary machine cooling water system through the cooling system.

[0011] Optionally, the auxiliary machine cooling water system further includes a filtering system located between its water outlet and the closed cooling water system.

[0012] Optionally, the closed cold water system includes a plurality of closed cold water coolers connected to the filtration system.

[0013] A second aspect of the present disclosure provides a steam turbine unit, wherein the steam turbine unit comprises a cooling system as described in any of the above optional schemes.

[0014] Through the above technical scheme, that is, the cooling system provided by the present invention, when cooling the closed cooling water in the closed cooling water system, the auxiliary machine cooling water system and the peak cooling system can be connected through the first pipeline, and the two cooling waters from the auxiliary machine cooling water system and the peak cooling system flow into the closed cooling water system through the water outlets of the two systems at the same time, so as to cool down the closed cooling water of the closed cooling water system, thereby reducing the problem of reduced cooling effect of the closed cooling water due to pipeline leakage of the auxiliary machine cooling water system, preventing the water temperature of the closed cooling water from continuing to rise, and ensuring the safe operation of the unit.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0017] Figure 1 2 is a schematic plan view of a cooling system and a steam turbine unit provided in an exemplary embodiment of the present disclosure.

[0018] Description of Reference Numerals

[0019] 1-first pipeline; 110-first main pipeline; 111-first regulating valve; 120-first sub-pipeline; 121-second regulating valve; 2-second pipeline; 210-second main pipeline; 211-third regulating valve; 220-second sub-pipeline; 221-fourth regulating valve; 3-auxiliary cooling water system; 4-peak cooling system; 410-circulating water absorption tank; 420-cooling tower fan; 5-closed cold water system; 510-closed cold water cooler; 6-filtration system. DETAILED DESCRIPTION

[0020] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0021] In this disclosure, unless otherwise stated, directional words such as "up, down, left, right" generally refer to Figure 1 In the drawing, the up, down, left, and right directions, "inside and outside" refer to the inside and outside relative to the outline of the component or structure itself, and "first, second", etc. are used to distinguish one element from another and have no order or importance.

[0022] In the related art, the closed cooling water system usually needs to be cooled by cold water from the auxiliary machine cooling water system, and then circulated through the pipes inside the closed cooling water system to the closed cooling water users for use. However, since the pipes of the auxiliary machine cooling water system are usually buried in the chassis and are difficult to maintain, the pipes are prone to aging or corrosion after long-term operation, which may cause the pipes to leak. After the pipes of the auxiliary machine cooling water system leak, the cooling effect on the closed cooling water system will also be reduced, causing the water temperature of the closed cooling water to continue to rise, which not only affects the use of the closed cooling water users, but also affects the safe operation of the unit. In severe cases, it may even require shutdown for treatment.

[0023] Based on the above technical problems, the first aspect of the present disclosure provides a cooling system, referring to Figure 1 As shown, the cooling system includes an auxiliary machine cooling water system 3 and a closed cold water system 5, the water outlet of the auxiliary machine cooling water system 3 is connected to the water inlet of the closed cold water system 5, and the water outlet of the closed cold water system 5 is connected to the return water end of the auxiliary machine cooling water system 3. The cooling system also includes a peak cooling system 4, and the water outlet of the peak cooling system 4 is connected to the water outlet of the auxiliary machine cooling water system 3 through a first pipeline 1.

[0024] Through the above-mentioned method, that is, the cooling system provided by the present invention, when cooling the closed cooling water in the closed cooling water system 5, the auxiliary machine cooling water system 3 and the peak cooling system 4 can be connected through the first pipeline 1, and the two cooling waters from the auxiliary machine cooling water system 3 and the peak cooling system 4 flow into the closed cooling water system 5 through the water outlet ends of the two systems at the same time, so as to cool down the closed cooling water of the closed cooling water system 5, thereby reducing the problem of reduced cooling effect of the closed cooling water due to pipeline leakage of the auxiliary machine cooling water system 3, preventing the water temperature of the closed cooling water from continuing to rise, and ensuring the safe operation of the unit.

[0025] In some embodiments, reference Figure 1 As shown, the cooling system also includes a second pipeline 2, which is used to connect the return water end of the peak cooling system 4 and the return water end of the auxiliary machine cooling water system 3. In this way, the cooling water flowing from the peak cooling system 4 and the auxiliary machine cooling water system 3 to the closed cooling water system 5 can be refluxed to the peak cooling system 4 and the auxiliary machine cooling water system 3 through the second pipeline 2 after heat exchange with the closed cooling water in the closed cooling water system 5, and then be cooled again. In this way, when the unit is running, the cooling water can circulate between the peak cooling system 4 and the closed cooling water system 5 and between the auxiliary machine cooling water system 3 and the closed cooling water system 5, which can improve the cooling effect of the closed cooling water and save the water consumption of the entire unit.

[0026] In some embodiments, reference Figure 1 As shown, the first pipeline 1 includes a first mother pipeline 110 and a first sub-pipeline 120, one end of the first mother pipeline 110 is connected to the water outlet of the auxiliary machine cooling water system 3; there are multiple first sub-pipelines 120 and they are connected in parallel to the first mother pipeline 110, and the other end of the first sub-pipeline 120 is connected to the water outlet of the peak cooling system 4. In this way, multiple first sub-pipelines 120 can jointly lead the water of the peak cooling system 4 to the first mother pipeline 110 through their water outlets, and collect together with the water from the water outlet of the auxiliary machine cooling water system 3 in the first mother pipeline 110 into the closed cold water system 5 to cool the closed cold water. In this way, the cooling output effect of the peak cooling system 4 can be improved, allowing more cold water cooled by the peak cooling system 4 to enter the closed cold water system 5, thereby improving the cooling effect of the closed cold water.

[0027] In some embodiments, reference Figure 1As shown, a first regulating valve 111 is provided on the first main pipeline 110, and a second regulating valve 121 is provided on the first sub-pipeline 120. In this way, the first main pipeline 110 can be opened or closed to allow or prevent the cold water passing through the outlet end of the peak cooling system 4 from entering the closed cold water system 5 to cool the closed cold water. Since there are multiple first sub-pipelines 120, multiple second regulating valves 121 of multiple first sub-pipelines 120 can be freely opened and closed to increase or decrease the flow of cooling water flowing from the peak cooling system 4 to the closed cold water system 5. Therefore, during the actual operation of the unit, the staff can choose whether to cool the closed cold water in the closed cold water system 5 through the peak cooling system 4 according to the actual working conditions. When the peak cooling system 4 needs to be activated, the first regulating valve 111 can be opened. 1 and the second regulating valve 121, the cold water of the peak cooling system 4 will flow into the closed cold water system 5. At the same time, the number of opening the second regulating valve 121 can be increased or decreased according to the actual cooling effect on the closed cold water. For example, when the circulating water inside the auxiliary machine cooling water system 3 can meet the cooling effect of the closed cold water of the closed cold water system 5, the opening number of the second regulating valve 121 can be reduced. When the circulating water inside the auxiliary machine cooling water system 3 cannot meet the cooling effect of the closed cold water of the closed cold water system 5, the opening number of the second regulating valve 121 can be increased, and more cold water can be input into the closed cold water system 5 through the peak cooling system 4 to improve the cooling effect on the closed cold water.

[0028] In some embodiments, reference Figure 1 As shown, the second pipeline 2 includes a second main pipeline 210 and a second sub-pipeline 220, one end of the second main pipeline 210 is connected to the return water end of the auxiliary machine cooling water system 3; there are multiple second sub-pipelines 220 connected in parallel to the second main pipeline 210, and the other end of the second sub-pipeline 220 is connected to the return water end of the peak cooling system 4. In this way, the second main pipeline 210 can return the water heated after heat exchange in the closed cold water system 5 to the peak cooling system 4 through multiple second sub-pipelines 220 for cooling, thereby improving the utilization rate of water inside the cooling system, allowing more water to circulate inside the cooling system.

[0029] In some embodiments, reference Figure 1As shown, the second main pipeline 210 is provided with a third regulating valve 211, and the second sub-pipeline 220 is provided with a fourth regulating valve 221. In this way, when it is not necessary to cool the closed cold water in the closed cold water system 5 through the peak cooling system 4, the third regulating valve 211 and the first regulating valve 111 can be closed, so that the cooling water flowing from the auxiliary machine cooling water system 3 to the closed cold water system 5 can be prevented from flowing into the peak cooling system 4 after heat exchange. When it is necessary to cool the closed cold water in the closed cold water system 5 through the peak cooling system 4, the third regulating valve 211 and the first regulating valve 111 can be opened. In this way, water can circulate between the peak cooling system 4 and the closed cold water system 5 and between the auxiliary machine cooling water system 3 and the closed cold water system 5, and the cooling effect of the closed cold water in the closed cold water system 5 can also be improved. At the same time, it can also be based on the closed cold water system According to the actual cooling effect of the closed cold water, the number of opened fourth regulating valves 221 is selected to be increased or decreased. For example, when the cooling effect of the closed cold water is reduced, multiple fourth regulating valves 221 can be opened, so that more water after heat exchange through the closed cold water system 5 can flow back to the peak cooling system 4 through multiple second sub-pipelines 220 for cooling, and more cold water is transported to the closed cold water system 5 to exchange heat with the closed cold water, thereby improving the cooling effect of the closed cold water. When the cooling effect of the closed cold water is increased, a part of the fourth regulating valves 221 can be closed, thereby indirectly reducing the circulating water volume of the peak cooling system 4, and also indirectly reducing the power generation of the peak cooling system 4 during the circulating water process.

[0030] In some embodiments, reference Figure 1 As shown, the peak cooling system 4 includes a circulating water absorption tank 410 and a plurality of cooling tower fans 420 connected to the circulating water absorption tank 410. The circulating water absorption tank 410 is connected to the water outlet of the auxiliary machine cooling water system 3 through the cooling system. In this way, the plurality of cooling tower fans 420 can cool the water returning from the plurality of second sub-pipelines 220 again. The cooled water can be sucked into the circulating water absorption tank 410 and then flow from the plurality of first sub-pipelines 120 to the closed cold water system 5, thereby cooling the closed cold water in the closed cold water system 5.

[0031] In some embodiments, reference Figure 1 As shown, the auxiliary machine cooling water system 3 also includes a filtering system 6 located between its water outlet and the closed cold water system 5. In this way, the filtering system 6 can filter the water before entering the closed cold water system 5 in advance, thereby improving the water quality of the water entering the closed cold water system 5. At the same time, the filtered water can also flow back to the auxiliary machine cooling water system 3 and the peak cooling system 4 after heat exchange with the closed cold water, thereby improving the water quality of the circulating water. The filtering system 6 may include a water purifier or a filter (not shown in the figure).

[0032] In some embodiments, reference Figure 1 As shown, the closed cooling water system 5 includes a plurality of closed cooling water coolers 510 connected to the filter system 6. In this way, the plurality of closed cooling water coolers 510 can simultaneously receive cold water from the auxiliary machine cooling water system 3 and the peak cooling system 4, and can cool the closed cooling water at the same time, thereby improving the cooling effect of the closed cooling water, so that the cooling system can operate safely and stably. For example, referring to Figure 1 As shown, the number of closed cooling water coolers 510 can be two, and the two closed cooling water coolers 510 can be connected in parallel to each other to jointly receive cold water and exchange heat with the closed cooling water. At the same time, under this arrangement, the number of the first mother pipeline 110 and the second mother pipeline 210 can also be two respectively, and they are connected to the two closed cooling water coolers 510 one by one. It should be noted that the number of two closed cooling water coolers 510 provided in the present disclosure is exemplary. When the actual operating conditions of the steam turbine unit change, more closed cooling water coolers 510 can also be set, such as three, four or more, and the present disclosure does not make specific limitations on this.

[0033] According to a second aspect of the present disclosure, a steam turbine unit is provided. The steam turbine unit includes a cooling system, and the cooling system has all the beneficial effects of the above-mentioned specific embodiments.

[0034] In order to facilitate those skilled in the art to understand the cooling process of the cooling system provided by the present disclosure on the closed cooling water, the present disclosure exemplarily describes the cooling process of the cooling system on the closed cooling water, for example, the following steps may be included:

[0035] When the circulating water of the auxiliary cooling water system 3 flowing through the closed cold water system 5 is not sufficient to achieve an effective cooling effect on the closed cold water, the first regulating valve 111 on the first mother pipeline 110 can be opened, the third regulating valve 211 on the second mother pipeline 210 can be opened, and the second regulating valves 121 on the multiple first sub-pipelines 120 and the fourth regulating valves 221 on the multiple second sub-pipelines 220 can also be opened. At this time, the peak cooling system 4 as a whole participates in the circulation of cooling the closed cold water. The cold water of the peak cooling system 4 can be supplied from the outside, cooled by the cooling tower fan 420, and then flows to the multiple first sub-pipelines 120 through the circulating water absorption pool 410. Pipeline 120, and then together converge into the first mother pipeline 110, and after merging with the cold water discharged from the auxiliary machine cooling water system 3, flow to the filtration system 6 for filtration, the filtered water can flow to multiple closed cold water coolers 510, exchange heat with the closed cold water, and the closed cold water is cooled after the heat exchange, and can flow to the closed cold water users for use. The water previously discharged from the filtration system 6 to the closed cold water cooler 510 will heat up after the heat exchange, and this part of the water can be diverted into two streams of water through the second pipeline 2, and flow to the auxiliary machine cooling water system 3 and the peak cooling system 4 respectively for cooling again, thereby continuously circulating to continuously cool the closed cold water.

[0036] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0037] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0038] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A cooling system, comprising an auxiliary machine cooling water system and a closed cooling water system, wherein the outlet of the auxiliary machine cooling water system is connected to the inlet of the closed cooling water system, and the outlet of the closed cooling water system is connected to the return water of the auxiliary machine cooling water system, characterized in that: The cooling system further comprises a peak cooling system, a water outlet of the peak cooling system being connected to a water outlet of the auxiliary machine cooling water system through a first pipeline.

2. The cooling system according to claim 1, characterized in that: The cooling system further includes a second pipeline, and the second pipeline is used to connect a return water end of the peak cooling system and a return water end of the auxiliary machine cooling water system.

3. The cooling system according to claim 1, characterized in that: The first pipeline comprises: A first mother pipeline, one end of which is connected to the water outlet of the auxiliary machine cooling water system; and There are multiple first sub-pipelines connected in parallel to the first main pipeline, and the other end of the first sub-pipeline is connected to the water outlet of the peak cooling system.

4. The cooling system according to claim 3, characterized in that: The first main pipeline is provided with a first regulating valve, and the first sub-pipeline is provided with a second regulating valve.

5. The cooling system according to claim 2, characterized in that: The second pipeline comprises: A second mother pipeline, one end of which is connected to the return water end of the auxiliary machine cooling water system; and There are multiple second sub-pipelines connected in parallel to the second main pipeline, and the other end of the second sub-pipeline is connected to the return water end of the peak cooling system.

6. The cooling system according to claim 5, characterized in that: The second main pipeline is provided with a third regulating valve, and the second sub-pipeline is provided with a fourth regulating valve.

7. The cooling system according to claim 6, characterized in that: The peak cooling system comprises a circulating water absorption pool and a plurality of cooling tower fans connected to the circulating water absorption pool. The circulating water absorption pool is connected to the water outlet of the auxiliary machine cooling water system through the cooling system.

8. The cooling system according to claim 7, characterized in that: The auxiliary machine cooling water system also includes a filtering system located between its water outlet and the closed cooling water system.

9. The cooling system according to claim 8, characterized in that: The closed cold water system includes a plurality of closed cold water coolers connected to the filtering system.

10. A steam turbine unit, characterized in that: Comprising a cooling system as claimed in any one of claims 1 to 9.

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