A cooling well

Abstract

The utility model relates to a drainage treatment technical field especially, relates to a cooling well. The cooling well includes cooling well main part, steam guide pipe, sprinkling structure and drainage structure, wherein the first partition wall has in the cooling well main part, the first partition wall divides and forms primary cooling area and secondary cooling area with the cooling well main part, the first partition wall is provided with the communicating hole, and the communicating hole is used for communicating primary cooling area and secondary cooling area, and the cooling well main part is provided with the drain pipe, and the drain pipe is used for communicating primary cooling area and external steam pipeline, the first partition wall is provided with the mounting hole, and the mounting hole is located above the liquid level of primary cooling area, and the steam guide pipe is installed in the mounting hole, and the outlet of steam guide pipe is lower than the liquid level of secondary cooling area, and the sprinkling structure is located above the liquid surface of primary cooling area and secondary cooling area, and the drainage structure is used at least for draining the liquid in secondary cooling area. The cooling well carries out the cooling to the drainage, and can avoid the diffusion of a large amount of steam from secondary evaporation cylinder during the drainage process.

Description

Technical Field

[0001] This utility model relates to the field of hydrophobic treatment technology, and in particular to a cooling well. Background Technology

[0002] In nuclear power plants, condensate formed from the condensation of steam in steam pipes, turbines, and heaters due to pressure or temperature drops needs to be promptly discharged to prevent safety hazards such as water hammer. For this purpose, condensate from the auxiliary steam pipes of the auxiliary steam system is directly discharged to the cooling well. Because the condensate in the auxiliary steam pipes is at a high temperature and the pipes are above the water level in the cooling well, the condensate discharged into the cooling well immediately flashes and generates steam, resulting in a large amount of steam diffusing around the cooling well. In related technologies, the large amount of steam diffusing from the secondary evaporator in the cooling well can cause the cooling well cover plate to overheat, damaging instruments installed on the cover plate and affecting equipment reliability. Utility Model Content

[0003] In one aspect, this utility model provides a cooling well to solve the problem that the diffusion of a large amount of steam from the secondary evaporator causes the cooling well cover plate to be too hot, which damages the instruments installed on the cover plate and affects the reliability of equipment operation.

[0004] This utility model provides a cooling well, which includes:

[0005] The cooling well body has a first partition wall inside, the height of the first partition wall is the same as the height of the cooling well body, the first partition wall divides the cooling well body into a primary cooling zone and a secondary cooling zone, the first partition wall is provided with a connecting hole, the connecting hole is used to connect the primary cooling zone and the secondary cooling zone, and the cooling well body is provided with a drain pipe, the drain pipe is used to connect the primary cooling zone to an external steam pipe;

[0006] A steam guide pipe is provided in the first partition wall, the mounting hole is located above the liquid level in the primary cooling zone, the steam guide pipe is installed in the mounting hole, and the outlet of the steam guide pipe is lower than the liquid level in the secondary cooling zone.

[0007] A spray structure, wherein the spray structure is located above the liquid surface of the primary cooling zone and / or the secondary cooling zone;

[0008] A drainage structure, which is at least used to drain liquid from the secondary cooling zone.

[0009] Based on the above technical solutions, optionally, the cooling well further includes a second partition wall, the height of which is lower than the height of the main body of the cooling well. The second partition wall and the first partition wall are spaced apart to divide the main body of the cooling well into at least the primary cooling zone, the secondary cooling zone, and the drainage zone. The second partition wall is located between the secondary cooling zone and the drainage zone, and the drainage structure is located within the drainage zone.

[0010] Based on the above technical solutions, optionally, a temperature sensor is also provided on the main body of the cooling well corresponding to the position of the primary cooling zone and the secondary cooling zone, and a liquid level sensor is also provided on the main body of the cooling well corresponding to the position of the drainage zone.

[0011] Based on the above technical solutions, optionally, the drainage structure includes a drainage pump and a drainage pipe, the drainage pump is located in the drainage area, the outlet of the drainage pump is connected to the drainage pipe, and the outlet of the drainage pipe is connected to the outside.

[0012] Based on the above technical solutions, optionally, the drainage structure further includes a drain valve, which is disposed at the opening of the drain pipe.

[0013] Based on the above technical solutions, optionally, the drainage structure also includes a check valve, which limits the flow of liquid from the drainage area to the outside.

[0014] Based on the above technical solutions, optionally, the number of drainage pumps is two or more, each drainage pump is provided with a corresponding connected drainage pipe, the drainage structure also includes a main pipe, all drainage pipes are connected to the main pipe, and the outlet of the main pipe is connected to the outside.

[0015] Based on the above technical solutions, optionally, the cooling well also includes an exhaust pipe, which is disposed at the top of the main body of the cooling well and located at the top of the secondary cooling zone to connect the secondary cooling zone with the outside atmosphere.

[0016] Based on the above technical solutions, optionally, the spray structure includes a spray pipe and an electric valve, the electric valve is disposed on the spray pipe, and the portion of the spray pipe located in the main body of the cooling well is provided with multiple spray holes.

[0017] Based on the above technical solutions, optionally, the cooling well body has a manhole, and a manhole cover is provided at the manhole; and / or, the steam guide pipe is an L-shaped pipe.

[0018] The above technical solution has at least the following advantages or beneficial effects:

[0019] Because the cooling well is divided into a primary cooling zone and a secondary cooling zone by the first partition wall, the condensate enters the primary cooling zone through the condensate drain pipe and is cooled by the spray structure. The condensate flashes out a large amount of steam upon contact with the coolant. The steam enters the secondary cooling zone under the guidance of the steam guide pipe. Since the steam guide pipe directly introduces the flashed steam below the liquid level in the secondary cooling zone, the flashed steam directly contacts the coolant, is cooled, and condenses into water. In addition, the spray structure located in the secondary cooling zone provides coolant to the secondary cooling zone, thereby reducing the temperature in the secondary cooling zone. The coolant in the secondary cooling zone is discharged through the drainage structure, which ensures that the coolant in the cooling well will not be too full and affect the cooling effect. By using the cooling well provided by this utility model to cool the condensate, it is possible to avoid the large amount of steam generated during the condensate drainage process from spreading from the secondary evaporator, avoid the high temperature of the cooling well cover plate, protect the instruments installed on the cover plate, and improve the reliability of equipment operation. Attached Figure Description

[0020] Figure 1 This is a top view of the cooling well in an embodiment of this utility model;

[0021] Figure 2 for Figure 1 Sectional view at point AA;

[0022] Figure 3 for Figure 1 Sectional view at point BB.

[0023] In the picture:

[0024] 1. Cooling well body; 11. Primary cooling zone; 12. Secondary cooling zone; 13. Drainage zone; 14. Manhole cover; 15. Accommodation zone; 2. First partition wall; 21. Connecting hole; 3. Steam guide pipe; 31. Discharge hole; 4. Drain pipe; 5. Second partition wall; 6. Temperature sensor; 7. Liquid level sensor; 8. Drainage structure; 81. Drain pump; 82. Drain pipe; 83. Drain valve; 84. Check valve; 85. Main pipe; 9. Spray structure; 91. Spray pipe; 911. Spray hole; 92. Electric valve; 10. Exhaust pipe. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] like Figure 1As shown, this embodiment provides a cooling well, which includes a cooling well body 1, a steam guide pipe 3, a spray structure 9, and a drainage structure 8. The cooling well body 1 has a first partition wall 2, the height of which is the same as the height of the cooling well body 1. The first partition wall 2 divides the cooling well body 1 into a primary cooling zone 11 and a secondary cooling zone 12. The first partition wall 2 is provided with a connecting hole 21 for connecting the primary cooling zone 11 and the secondary cooling zone 12. The cooling well body 1 is provided with a drain pipe 4 for connecting the primary cooling zone 11 to an external steam pipe. The first partition wall 2 is provided with an installation hole located above the liquid level in the primary cooling zone 11. The steam guide pipe 3 is installed in the installation hole, and the outlet of the steam guide pipe 3 is lower than the liquid level in the secondary cooling zone 12. The spray structure 9 is located above the liquid levels in the primary cooling zone 11 and the secondary cooling zone 12. The drainage structure 8 is used to drain the liquid in the secondary cooling zone 12.

[0030] Because the cooling well is divided into a primary cooling zone 11 and a secondary cooling zone 12 by the first partition wall 2, the condensate enters the primary cooling zone 11 through the condensate pipe 4 and is cooled by the spray structure 9. The condensate flashes out a large amount of steam upon contact with the coolant. The steam enters the secondary cooling zone 12 under the guidance of the steam guide pipe 3. Since the steam guide pipe 3 directly introduces the flashed steam into the liquid level of the secondary cooling zone 12, the flashed steam directly contacts the coolant, is cooled, and condenses into water. In addition, the spray structure 9 located in the secondary cooling zone 12 provides coolant to the secondary cooling zone 12, thereby reducing the temperature in the secondary cooling zone 12. The coolant in the secondary cooling zone 12 is discharged through the drainage structure 8, which can ensure that the coolant in the cooling well is not too full and affects the cooling effect. By cooling the condensate through the cooling well provided by this utility model, a large amount of steam generated during the condensate drainage process can be avoided from spreading from the secondary evaporator, the temperature of the cooling well cover plate can be avoided to be too high, the instruments installed on the cover plate can be protected, and the reliability of equipment operation can be improved.

[0031] It should be noted that the number of drainage pipes 4 is at least one, and in other embodiments there may be two or more.

[0032] In some embodiments, the steam guide pipe 3 is an L-shaped pipe.

[0033] The L-shaped pipe can depressurize and cool the steam in the primary cooling zone 11. In the secondary cooling zone 12, the L-shaped steam guide pipe 3 has a discharge hole 31 at a depth of 0.1m below the water surface and is inserted 1m below the water surface. It is calculated that pressure relief begins when the pressure in the primary cooling zone reaches 1 kPa, with a maximum pressure of 10 kPa. The temperature sensor 6, interlocked with the electric valve 92 of the spray structure 9, is located at the bottom of the secondary cooling zone 12. When the temperature at the measuring point reaches 40℃, the electric valve 92 automatically opens; when the temperature at the measuring point reaches 35℃, the electric valve 92 automatically closes. The liquid level sensor 7, associated with the drain valve 83, is located in the drain zone 13. The drain zone 13 and the bottom of the receiving area 15 are connected. When the liquid level reaches a certain height, the pump can drain the water in the drain zone 13 and the receiving area 15 to the required height. Ultimately, this achieves simultaneous functions of sufficient steam condensation in the cooling well, water drainage and cooling in the cooling well, and automatic drainage.

[0034] The portion of the steam guide pipe 3 located in the secondary cooling zone 12 has multiple discharge holes 31, and this portion is positioned below the liquid level. The steam guide pipe 3 prevents overpressure in the primary cooling zone 11 and ensures sufficient cooling of the steam in the primary cooling zone 11. For example, the first partition wall 2 has an installation hole 0.1m above the liquid level in the primary cooling zone 11, and the portion of the steam guide pipe 3 located in the secondary cooling zone 12 is inserted 1m below the water surface. It is calculated that pressure relief begins when the pressure in the inlet zone reaches 1kPa, and the maximum pressure in the inlet zone is 10kPa.

[0035] Combination Figure 1 and Figure 2 In some embodiments, the cooling well also includes a second partition wall 5, the height of which is lower than the height of the cooling well body 1. The second partition wall 5 and the first partition wall 2 are spaced apart to divide the cooling well body 1 into at least a primary cooling zone 11, a secondary cooling zone 12 and a drainage zone 13. The second partition wall 5 is disposed between the secondary cooling zone 12 and the drainage zone 13, and the drainage structure 8 is partially located within the drainage zone 13.

[0036] The number of second partition walls 5 is not limited to one, but can be two, three or more. The second partition wall 5 closest to the first partition wall 2 is connected to the bottom of the cooling well body 1, while the second partition wall 5 away from the first partition wall 2 has a connecting hole to connect the areas on both sides of the second partition wall 5.

[0037] The primary cooling zone 11 and the secondary cooling zone 12 are connected, and their heights are the same as the height of the second partition wall 5. Since the spray structure 9 sprays coolant to the primary and secondary cooling zones 11 and 12, the coolant level in the secondary cooling zone 12 will change and continuously rise. The drainage zone 13 ensures that the coolant level in the secondary cooling zone 12 does not rise to the top of the cooling well body 1, while also preventing the secondary cooling zone 12 from being unable to accommodate the coolant sprayed from the spray structure 9. The drainage structure 8 is located within the drainage zone 13 to drain the water from it, thus ensuring that the water temperature in the secondary cooling zone 12 can cool the flashed gas. The first partition wall 2 prevents gas from diffusing from the top of the water inlet zone to the secondary cooling zone 12 and the drainage zone 13, solving the problem of steam diffusion in the cooling well.

[0038] like Figure 1 and Figure 2 As shown, in some embodiments, the drainage structure 8 includes a drainage pump 81 and a drainage pipe 82. The drainage pump 81 is located in the drainage area 13, and the outlet of the drainage pump 81 is connected to the drainage pipe 82. The outlet of the drainage pipe 82 is connected to the outside.

[0039] The drain pump 81 discharges the coolant in the drainage zone 13 out of the cooling well through the drain pipe 82 to ensure that the coolant level in the drainage zone 13 does not exceed the height of the second partition wall 5.

[0040] In some embodiments, the drainage structure 8 further includes a drain valve 83, which is disposed at the opening of the drain pipe 82.

[0041] The drain valve 83 is set to open and close according to the liquid level in the drain zone 13, thereby ensuring that the coolant in the drain zone 13 can be discharged from the drain pipe 82 and preventing coolant from flowing out of the drain pipe 82 during non-draining times.

[0042] In some embodiments, the drainage structure 8 further includes a check valve 84, which restricts the flow of liquid from the drainage zone 13 to the outside.

[0043] The structure of the check valve 84 is existing technology. The check valve 84 can prevent external liquid from entering the drainage area 13 through the drain pipe 82 and affecting the cooling function of the secondary cooling area 12.

[0044] In some embodiments, there are two or more drainage pumps 81, each drainage pump 81 is provided with a corresponding connected drainage pipe 82, and the drainage structure 8 also includes a main pipe 85, all drainage pipes 82 are connected to the main pipe 85, and the outlet of the main pipe 85 is connected to the outside.

[0045] There are two or more drain pumps 81, which can achieve one in use and one on standby. In addition, all drain pumps 81 can work simultaneously to discharge the liquid in the drainage area 13 as quickly as possible, thereby improving drainage efficiency.

[0046] In addition, the main body 1 of the cooling well protrudes to the bottom and has a receiving part. The receiving part forms a receiving area 15. The receiving area 15 is located at the bottom of the drainage area 13 and is connected to the drainage area 13. The receiving area 15 is used to install the drainage pump 81. In this way, the drainage pump 81 is located at the bottom of the drainage area 13, which can maximize the discharge of coolant in the drainage area 13.

[0047] like Figure 1 As shown, in some embodiments, the spray structure 9 includes a spray pipe 91 and an electric valve 92. The electric valve 92 is disposed on the spray pipe 91, and the portion of the spray pipe 91 located in the cooling well body 1 is provided with a plurality of spray holes 911.

[0048] The electric valve 92 can cut off or open the spray pipe 91. In addition, the electric valve 92, in conjunction with the temperature sensor 6, can achieve the purpose of automatic opening and closing. Of course, in other embodiments, the electric valve 92 can also achieve the purpose of automatic opening and closing based on the liquid level sensor 7 set in the drainage area 13, so as to prevent the liquid level in the secondary cooling area 12 from exceeding the height of the second partition wall 5.

[0049] like Figure 1 and Figure 2 As shown, in some embodiments, a temperature sensor 6 is also provided at the position of the cooling well body 1 corresponding to the primary cooling zone 11 and the secondary cooling zone 12, and a liquid level sensor 7 is also provided at the position of the cooling well body 1 corresponding to the drainage zone 13.

[0050] Temperature sensors 6 are respectively installed in the water inlet zone and the secondary cooling zone 12. Temperature sensors 6 are not submerged below the water surface. When the temperature of temperature sensor 6 is higher than the preset temperature, the corresponding electric valve 92 is opened. When the temperature of temperature sensor 6 is lower than the preset temperature, the corresponding electric valve 92 is closed. The spray structure 9 injects coolant into the primary cooling zone 11 and the secondary cooling zone 12, automatically mixing coolant according to the water temperature, thus saving coolant consumption. For example, when the temperature of temperature sensor 6 in the primary cooling zone 11 and the secondary cooling zone 12 is higher than 40°C, the corresponding electric valve 92 in the primary cooling zone 11 and the secondary cooling zone 12 is opened; when the temperature of temperature sensor 6 in the primary cooling zone 11 and the secondary cooling zone 12 is lower than 35°C, the corresponding electric valve 92 in the primary cooling zone 11 and the secondary cooling zone 12 is closed.

[0051] Temperature sensor 6 is used to detect the temperature of primary cooling zone 11 and secondary cooling zone 12. The spray structure 9 then opens or closes according to the temperature obtained by temperature sensor 6 to provide coolant to primary cooling zone 11 and / or secondary cooling zone 12 to achieve the purpose of cooling.

[0052] The level sensor 7 is used to detect the liquid level in the drainage zone 13 and is connected in communication with the drainage structure 8 to transmit the liquid level of the drainage zone 13 to the drainage structure 8, causing the drainage structure 8 to start and stop according to the liquid level. For example, when the liquid level reaches a set high level, the drainage pump 81 is automatically started; when the liquid level falls below a set low level, the drainage pump 81 is automatically stopped. This achieves the function of automatically draining wastewater to a designated wastewater treatment facility. For example, when the liquid level sensor 7 detects a liquid level above 1.7m, the drainage pump 81 is automatically started. When the liquid level sensor 7 detects a liquid level below 0.7m, the drainage pump 81 is automatically stopped.

[0053] like Figure 1 and Figure 2 As shown, in some embodiments, the cooling well also includes an exhaust pipe 10, which is disposed at the top of the cooling well body 1 and is located at the top of the secondary cooling zone 12 to connect the secondary cooling zone 12 with the outside atmosphere.

[0054] The exhaust pipe 10 can discharge the gas in the secondary cooling zone 12, avoiding the risk of overpressure in the cooling well due to the increased amount of steam entering the cooling well caused by internal leakage of the equipment.

[0055] like Figure 3 As shown, in some embodiments, the cooling well body 1 has a manhole, and a manhole cover 14 is provided at the manhole.

[0056] The manhole is designed to allow operators to easily enter the cooling well body 1 for maintenance. The manhole cover 14 is located at the manhole and is sealed to the manhole.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A cooling well, characterized in that, include: The cooling well body (1) has a first partition wall (2) inside, the height of the first partition wall (2) is the same as the height of the cooling well body (1), the first partition wall (2) divides the cooling well body (1) into a primary cooling zone (11) and a secondary cooling zone (12), the first partition wall (2) is provided with a connecting hole (21), the connecting hole (21) is used to connect the primary cooling zone (11) and the secondary cooling zone (12), the cooling well body (1) is provided with a drain pipe (4), the drain pipe (4) is used to connect the primary cooling zone (11) and the external steam pipe; A steam guide pipe (3) is provided in the first partition wall (2), the mounting hole is located above the liquid level of the primary cooling zone (11), the steam guide pipe (3) is installed in the mounting hole, and the outlet of the steam guide pipe (3) is lower than the liquid level of the secondary cooling zone (12); A spray structure (9) is located above the liquid surface of the primary cooling zone (11) and / or the secondary cooling zone (12); A drainage structure (8) is provided for at least draining liquid from the secondary cooling zone (12).

2. The cooling well according to claim 1, characterized in that, The cooling well also includes a second partition wall (5), the height of which is lower than the height of the main body of the cooling well (1). The second partition wall (5) and the first partition wall (2) are spaced apart to divide the main body of the cooling well (1) into at least the primary cooling zone (11), the secondary cooling zone (12), and the drainage zone (13). The second partition wall (5) is located between the secondary cooling zone (12) and the drainage zone (13). The drainage structure (8) is partially located within the drainage zone (13).

3. The cooling well according to claim 2, characterized in that, Temperature sensors (6) are also provided on the main body (1) of the cooling well corresponding to the primary cooling zone (11) and the secondary cooling zone (12), and liquid level sensors (7) are also provided on the main body (1) of the cooling well corresponding to the drainage zone (13).

4. The cooling well according to claim 2 or 3, characterized in that, The drainage structure (8) includes a drainage pump (81) and a drainage pipe (82). The drainage pump (81) is located in the drainage area (13). The outlet of the drainage pump (81) is connected to the drainage pipe (82), and the outlet of the drainage pipe (82) is connected to the outside.

5. The cooling well according to claim 4, characterized in that, The drainage structure (8) also includes a drain valve (83), which is located at the opening of the drain pipe (82).

6. The cooling well according to claim 4, characterized in that, The drainage structure (8) also includes a check valve (84), which restricts the flow of liquid from the drainage area (13) to the outside.

7. The cooling well according to claim 4, characterized in that, The number of drainage pumps (81) is two or more, and each drainage pump (81) is provided with a corresponding connected drainage pipe (82). The drainage structure (8) also includes a main pipe (85). All drainage pipes (82) are connected to the main pipe (85), and the outlet of the main pipe (85) is connected to the outside.

8. The cooling well according to any one of claims 1-3, characterized in that, The cooling well also includes an exhaust pipe (10), which is located at the top of the cooling well body (1) and at the top of the secondary cooling zone (12) to connect the secondary cooling zone (12) with the outside atmosphere.

9. The cooling well according to any one of claims 1-3, characterized in that, The spray structure (9) includes a spray pipe (91) and an electric valve (92). The electric valve (92) is disposed on the spray pipe (91). The spray pipe (91) located in the part of the cooling well body (1) is provided with a plurality of spray holes (911).

10. The cooling well according to any one of claims 1-3, characterized in that, The cooling well body (1) has a manhole, and a manhole cover (14) is provided at the manhole; and / or, the steam guide pipe (3) is an L-shaped pipe.

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