De-foaming device for open drainage channel of nuclear power plant

Abstract

The utility model discloses a defoaming device for a drainage open channel of a nuclear power plant. The defoaming device comprises a loading platform arranged at the drainage open channel of the nuclear power plant, a defoaming mechanism and at least one control unit for controlling the power of a power assembly, the defoaming mechanism is arranged on the loading platform and comprises at least one spraying assembly used for conducting spraying operation on the drainage open channel and at least one power assembly used for pumping water to the spraying assembly. The spraying assembly is communicated with the power assembly; the power assembly is electrically connected with the control unit. The defoaming agent can replace a chemical defoaming agent to perform defoaming operation on the drainage open channel.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a defoaming device for an open drainage channel of a nuclear power plant. Background Art

[0002] During operation, nuclear power plant cooling systems require the purification and disinfection of seawater to ensure that the cooling water meets acceptable standards. During this disinfection process, microbial decomposition produces foam. Furthermore, due to the large drop in height between the outlet and the open drainage channel, the impact of gravity on the water surface also produces foam. These two factors combine to create a high level of foam in the open drainage channel. Currently, nuclear power plants primarily use environmentally friendly defoaming agents to destabilize the foam. However, this method results in high annual defoaming agent costs, hindering cost reduction and efficiency gains for nuclear power plants. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a defoaming device for an open drainage channel of a nuclear power plant.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A defoaming device for an open drainage channel of a nuclear power plant is constructed, comprising:

[0006] A loading platform installed at the outlet of the nuclear power plant drain pipe;

[0007] a defoaming mechanism, provided on the loading platform, comprising at least one spray assembly for spraying water into the open drainage channel, and at least one power assembly for pumping water into the spray assembly; the spray assembly is in communication with the power assembly; and

[0008] At least one control unit for controlling the power of the power assembly, wherein the power assembly is electrically connected to the control unit.

[0009] In some embodiments, the power assembly includes a water suction pump and a water suction pipe, one end of the water suction pipe is connected to the spray assembly, the water suction pump is arranged on the water suction pipe, and the water suction pump is electrically connected to the control unit.

[0010] In some embodiments, the water suction pipe is vertically arranged on the lower side of the loading platform, and the top end thereof is connected to the spray assembly; the water suction pump is arranged at the bottom end of the water suction pipe and is located in the open drainage channel.

[0011] In some embodiments, the water suction pump is a submersible pump.

[0012] In some embodiments, the spray assembly includes a spray pipe and a plurality of spray heads, and the plurality of spray heads are arranged on the spray pipe at intervals.

[0013] In some embodiments, the defoaming mechanism further includes a connecting pipe disposed on the loading platform; one end of the spray pipe is connected to the connecting pipe, and the power assembly is connected to the spray pipe through the connecting pipe.

[0014] In some embodiments, the loading platform includes an annular platform body, the connecting pipe is arranged on the circumference of the platform body, and the spray pipe extends from the connecting pipe to the inside of the platform body.

[0015] In some embodiments, there are multiple spray assemblies, and the spray pipes of the multiple spray assemblies are arranged at intervals on the connecting pipe.

[0016] In some embodiments, the loading platform further includes a plurality of support columns, and the plurality of support columns are arranged at intervals in the circumferential direction of the platform body.

[0017] In some embodiments, the number of the power components is at least two, and the control unit is electrically connected to at least two of the power components respectively.

[0018] Beneficial effects of the utility model:

[0019] This application utilizes a defoaming mechanism to spray water into the open drainage channel to impact the foam, thereby disrupting the foam's stability and achieving physical defoaming. This can replace chemical defoamers, avoiding environmental pollution and achieving a pollution-free environment. It also reduces defoamer consumption in nuclear power plants, improving economic efficiency. This application utilizes a power component to adjust the spraying power of the defoaming mechanism. This allows for flexible adjustments based on the foam situation in the open drainage channel, enabling targeted defoaming operations and further improving the economic efficiency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0021] Figure 1 It is a structural schematic diagram of a nuclear power plant drainage open channel defoaming device according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front," "back," "up," "down," "left," "right," "vertical," "horizontal," "bottom," "inside," "inside," and "outside" are based on the directions or positional relationships shown in some of the accompanying drawings and are constructed and operated in specific directions. They are merely for the purpose of facilitating the description of the present technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limitations on the present invention.

[0023] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0024] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present invention with unnecessary detail.

[0025] like Figure 1 As shown, the present application provides a defoaming device 1 for an open drainage channel in a nuclear power plant. The device comprises a loading platform 10, a defoaming mechanism 20, and a control unit 30. The loading platform 10 is located at the outlet of the nuclear power plant's drainage pipe. The defoaming mechanism 20, mounted on the loading platform 10, is used to spray water into the open drainage channel to eliminate foam. The control unit 30 is used to control the operation of the defoaming mechanism 20.

[0026] Specifically, the defoaming mechanism 20 includes at least one spray assembly 21 and at least one power assembly 22. The spray assembly 21 is connected to the power assembly 22 and is used to spray water into the open drainage channel to perform physical defoaming. The power assembly 22 is used to pump water into the spray assembly 21 to cooperate with the spray assembly 21 to achieve the defoaming operation. The control unit 30 is electrically connected to the power assembly 22 and is used to control the pumping power of the power assembly 22.

[0027] It should be understood that the outlet end of the drainage pipe of the nuclear power plant is connected to an open drainage channel, which is connected to the ocean to discharge the water discharged from the outlet into the ocean.

[0028] The nuclear power plant open channel defoaming device 1 in this application is located at the outlet of a drainage pipe. This "outlet of the drainage pipe" can refer to the open channel or another location near the open channel. As long as the nuclear power plant open channel defoaming device 1 (loading platform 10) is positioned correctly, the spray assembly 21 can spray water into the open channel to eliminate foam.

[0029] In this embodiment, the "drain pipe outlet" refers to the open drainage channel as an example to illustrate this application.

[0030] The present application provides a defoaming mechanism 20 to spray water into the open drainage channel to impact the foam, thereby destroying the stability of the foam and achieving the defoaming effect. Furthermore, the defoaming mechanism can replace chemical defoamers, avoid environmental pollution, and achieve a pollution-free environment. At the same time, it reduces the defoamer consumption of nuclear power plants and improves economic benefits.

[0031] The present application sets a power component 22 to adjust the spraying power of the defoaming mechanism 20, and can further flexibly adjust it according to the foam situation in the drainage channel, perform defoaming operations in a targeted manner, and further improve the economy of the operation.

[0032] In some embodiments, the loading platform 10 includes a platform body 11 and a plurality of support columns 12, wherein the support columns 12 are erected on the platform body 11 for supporting the platform body 11. The platform body 11 is supported by the support columns 12 and is disposed above the open drainage channel for carrying the defoaming mechanism 20 so that the defoaming mechanism 20 can spray water into the open drainage channel.

[0033] Specifically, in this embodiment, the platform body 11 is roughly rectangular ring-shaped, and a plurality of support columns 12 are spaced apart and erected on the circumference of the platform body 11 to reduce the mass of the platform body 11 and reduce the production cost while ensuring a larger coverage area for the open drainage channel.

[0034] In other optional embodiments, the platform body 11 may also be a circular, elliptical, polygonal, irregular, or other annular structure. The platform body 11 may also be configured as a plate-like structure, a mesh structure, or other structures of various shapes. The shape and structure may be selected as long as it can support the defoaming mechanism 20.

[0035] In some embodiments, the spray assembly 21 includes a spray pipe 212 and multiple spray heads 211. The spray pipe 212 is mounted on the loading platform 10, and the multiple spray heads 211 are spaced apart on the spray pipe 212. Water to be sprayed into the open drainage channel passes through the spray pipe 212 and is then distributed to the multiple spray heads 211 for spraying, thereby increasing the coverage area of the open drainage channel.

[0036] In this embodiment, multiple spray assemblies 21 are arranged at intervals around the circumference of the platform body 11. The spray pipe 212 of each spray assembly 21 is elongated, rod-shaped, with one end mounted on the platform body 11 and the other end extending into the platform body 11. The nozzle of the spray head 211 on the spray pipe 212 is positioned downward. This arrangement ensures coverage of the corresponding open drainage channels within the area covered by the platform body 11, expanding the coverage area and improving the effectiveness of the defoaming operation.

[0037] It should be understood that the spray pipe 212 in this embodiment is extended in such a manner that it can only cover the space within the range covered by the platform body 11. In this case, the size of the platform body 11 is preferably large enough to cover the entire drainage channel (i.e., the two sides of the platform body 11 are respectively located on both sides of the drainage channel) to ensure coverage of the defoaming operation.

[0038] It should be understood that the spray pipe 212 can be extended so that its axis is perpendicular to the tangent line of the platform body 11 to which the spray pipe 212 is connected, or it can be arranged non-perpendicularly thereto. The spray pipe 212 can extend inwardly toward the platform body 11 horizontally, or at an angle upward or downward, without limitation.

[0039] It should be understood that the number of the spray heads 211 is not limited herein and can be evenly or unevenly spaced on the spray pipe 212. The number of the spray heads 211 on each spray pipe 212 needs to be flexibly adjusted according to actual conditions such as the length of the spray pipe 212.

[0040] In other optional embodiments, the number of the spray pipes 212 can be one, two, or the like. When there are two or more spray pipes 212, the shapes of the spray pipes 212 can be the same or different. The shapes of the spray pipes 212 can be arc-shaped, annular, spiral, irregular, or any other shape. It should be understood that the shape and number of the spray pipes 212 can be set to achieve spray coverage of the open drainage channel.

[0041] In other optional embodiments, the spray pipe 212 can extend partially inward and partially outward from the platform body 11, thereby further expanding the coverage area of the nuclear power plant open drainage channel defoaming device 1 and improving the defoaming effect on the open drainage channel. Alternatively, the size of the platform body 11 can be reduced while maintaining the same coverage area of the open drainage channel, thereby reducing production costs. In this embodiment, the width of the platform body 11 can be smaller than the width of the two sides of the open drainage channel.

[0042] In some other optional embodiments, the spray pipe 212 can also be vertically upward or vertically downwardly installed on the platform body 11, and the nozzle of the spray head 211 is set to be horizontally oriented. At this time, the water sprayed by the spray head 211 can move downward under the action of gravity, or it can be sprayed into the drainage channel to achieve a larger coverage area.

[0043] In some other optional embodiments, for the nuclear power plant drainage open channel defoaming device 1 in the embodiment of the platform body 11 configured as a plate-like structure, the spray pipe 212 can also be installed as a whole on the lower end surface of the platform body 11 to improve the stability of the spray pipe 212.

[0044] In some embodiments, the power assembly 22 includes a water suction pump 221 and a water suction pipe 222. One end of the water suction pipe 222 is connected to the spray assembly 21 (specifically, the spray pipe 212). The water suction pump 221 is disposed on the water suction pipe 222 for pumping water. The control unit 30 is electrically connected to the water suction pump 221.

[0045] In this embodiment, the water suction pipe 222 is vertically disposed on the underside of the platform body of the loading platform 10. Its top end is connected to the spray assembly 21, and its bottom end is provided with a water suction pump 221. The water suction pump 221 is located in the water of the drainage channel to pump water from the drainage channel.

[0046] During the specific defoaming operation, the control unit 30 controls the water suction pump 221 to suck the water in the drainage channel from the water suction pipe 222 into the spray assembly 21, and sprays it out through the spray head 211 to destroy the foam on the water surface of the drainage channel and achieve a defoaming effect.

[0047] It's important to understand that after disinfection, the microorganisms in the water at a nuclear power plant decompose into organic matter like protein, which in turn creates foam under the impact of the water flow. Furthermore, due to the large vertical height difference between the drain outlet and the surface of the open drainage channel, the water falling into the open drainage channel is impacted by the water flow, which in turn creates foam.

[0048] Because the platform body 11 of the loading platform 10 in this application is positioned at a certain height above the open drainage channel, and lower than the drainage outlet, the height difference is relatively small, making it less likely for water impact to generate foam. Furthermore, the nuclear power plant open drainage channel defoaming device 1 can also control the power of the power assembly 22 pumping water via the control unit 30, thereby preventing the spray head 211 from generating foam due to excessive water pressure. In other words, even if the nuclear power plant open drainage channel defoaming device 1 uses water from the open drainage channel for spraying, it will not generate foam. Instead, the spraying action will change the liquid's motion state and surface tension, effectively eliminating foam.

[0049] In some other optional embodiments, the water suction pump 221 may not be arranged in the open drainage channel, and can be connected to other water sources to achieve the effect of pumping water to the spray assembly 21.

[0050] In some embodiments, the water suction pump 221 can be an existing submersible pump, which is easy to install, has a large flow rate, and can achieve flow rate adjustment within a range. At the same time, the corrosion-resistant submersible pump can also be free from high salt spray metal corrosion and has a long service life.

[0051] When there are multiple spraying components 21 , the number of power components 22 can be set to be multiple accordingly. Each spraying component 21 corresponds to one power component 22 .

[0052] In some embodiments, the defoaming mechanism 20 also includes a connecting pipe 23, which is arranged on the platform body 11 of the loading platform 10, and is used to connect each spray pipe 212, so that the effect of pumping water to all spray components 21 can be achieved by only setting up one power component 22.

[0053] Specifically, in this embodiment, the connecting pipe 23 is provided on the circumference of the platform body 11, and one end of the spray pipe 212 is connected to the connecting pipe 23 and supported by the platform body 11 through the connecting pipe 23. The other end of the spray pipe 212 extends inward from the connecting pipe 23.

[0054] Furthermore, in this embodiment, there are two power assemblies 22, and the top ends of the water suction pipes 222 in the two power assemblies 22 are respectively connected to the multiple spray pipes 212 through the connecting pipes 23. Therefore, the two power assemblies 22 together achieve the effect of pumping water to the multiple spray assemblies 21, ensuring sufficient power for pumping water.

[0055] Specifically, the two power assemblies 22 are arranged at opposite positions in this embodiment. That is, the two power assemblies 22 are respectively located at two opposite sides of the connecting pipe 23 to ensure uniformity in pumping power to each spray assembly 21.

[0056] In other optional embodiments, the connecting pipe 23 can also be flexibly arranged according to the different shapes of the platform body 11 and the different distributions of the spray pipes 212. The location of the connecting pipe 23 can be any location as long as it can connect all the spray pipes 212, and is not specifically limited here.

[0057] In other optional embodiments, the number of the power assembly 22 can be one, or three, four, or other plurality. When there are multiple power assemblies 22, their connection positions on the connecting pipe 23 can be evenly spaced, or relatively concentrated at one or several points.

[0058] In some embodiments, the number of the control unit 30 can be one or more. When there are multiple power assemblies 22 and multiple control units 30, the number of control units 30 can be the same as the number of power assemblies 22 or less than the number of power assemblies 22.

[0059] When the number of the control units 30 is less than the number of the power assemblies 22 , each control unit 30 may be electrically connected to at least two power assemblies 22 or one power assembly 22 , which is not specifically limited herein.

[0060] In this embodiment, there are two control units 30 , and the two control units 30 correspond to two power assemblies 22 respectively, thereby achieving one-to-one control of the power assemblies 22 .

[0061] It should be understood that the control unit 30 can use existing technologies such as motors to achieve control of the pump, etc., and no specific limitation is made here.

[0062] It can be understood that the above embodiments only express some implementation methods of the present application, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the present application. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present application, the above embodiments or technical features can be freely combined, and several deformations and improvements can be made, which all fall within the scope of protection of the present application, that is, the embodiments described in "some embodiments" can be freely combined with any of the above and below embodiments; therefore, all equivalent changes and modifications made to the scope of the claims of the present application should fall within the scope of coverage of the claims of the present application.

Claims

1. A defoaming device for an open drainage channel of a nuclear power plant, characterized in that: include: A loading platform (10) provided at the outlet of a drainage pipe of a nuclear power plant; a defoaming mechanism (20) disposed on the loading platform (10), comprising at least one spray assembly (21) for spraying the open drainage channel, and at least one power assembly (22) for pumping water to the spray assembly (21); the spray assembly (21) is in communication with the power assembly (22); and At least one control unit (30) is used to control the power of the power component (22), and the power component (22) is electrically connected to the control unit (30).

2. The defoaming device for open drainage channel of nuclear power plant according to claim 1, characterized in that: The power assembly (22) comprises a water suction pump (221) and a water suction pipe (222), one end of the water suction pipe (222) is connected to the spray assembly (21), the water suction pump (221) is arranged on the water suction pipe (222), and the water suction pump (221) is electrically connected to the control unit (30).

3. The defoaming device for open channel drainage of a nuclear power plant according to claim 2, characterized in that: The water suction pipe (222) is vertically arranged on the lower side of the loading platform (10), and its top end is connected to the spray assembly (21); the water suction pump (221) is arranged at the bottom end of the water suction pipe (222) and is located in the drainage channel.

4. The defoaming device for open drainage channel of nuclear power plant according to claim 3, characterized in that: The water suction pump (221) is a submersible pump.

5. The defoaming device for open drainage channel of nuclear power plant according to claim 1, characterized in that: The spray assembly (21) comprises a spray pipe (212) and a plurality of spray heads (211), wherein the plurality of spray heads (211) are arranged on the spray pipe (212) at intervals.

6. The defoaming device for open channel drainage of a nuclear power plant according to claim 5, characterized in that: The defoaming mechanism (20) further comprises a connecting pipe (23) arranged on the loading platform (10); one end of the spray pipe (212) is connected to the connecting pipe (23), and the power assembly (22) is connected to the spray pipe (212) via the connecting pipe (23).

7. The defoaming device for open channel drainage of a nuclear power plant according to claim 6, characterized in that: The loading platform (10) comprises an annular platform body (11), the connecting pipe (23) is arranged on the circumference of the platform body (11), and the spray pipe (212) extends from the connecting pipe (23) to the inside of the platform body (11).

8. The defoaming device for open drainage channel of nuclear power plant according to claim 7, characterized in that: There are multiple spray assemblies (21), and the spray pipes (212) of the multiple spray assemblies (21) are arranged at intervals on the connecting pipe (23).

9. The defoaming device for open drainage channel of nuclear power plant according to claim 7, characterized in that: The loading platform (10) further comprises a plurality of support columns (12), wherein the plurality of support columns (12) are arranged at intervals in a circumferential direction of the platform body (11).

10. The defoaming device for open drainage channel of nuclear power plant according to claim 1, characterized in that: The number of the power components (22) is at least two, and the control unit (30) is electrically connected to at least two of the power components (22) respectively.

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