Physical defoaming device and power plant foam treatment equipment

Abstract

The utility model provides a physical defoaming device and power plant foam treatment equipment. The physical defoaming device comprises a trestle, a foam blocking net connected with the trestle, a spraying pipeline arranged on the trestle and a plurality of spraying heads arranged on the spraying pipeline and used for spraying water. Wherein the trestle is used for being erected on a drainage site; the foam blocking net is used for being arranged on a drainage place, so that foams in the drainage place can be collected in the foam blocking net; the spraying pipeline is arranged close to the bubble blocking net and is used for pumping water in the drainage place so as to convey the water into the spraying head; the multiple spraying heads are sequentially arranged in the extending direction of the bubble blocking net, so that the spraying range of the spraying heads covers the bubble blocking net. By adopting the technical scheme, the trestle can be convenient for personnel to safely carry out maintenance work; the foam blocking net is arranged on the drainage site, so that foam at the drainage site is blocked and collected, and the foam blocking efficiency is improved; the spray header achieves the purpose of rapid and concentrated spraying and defoaming, can replace a chemical defoaming agent, has no pollution to the environment, and is environment-friendly and economical.

Description

Technical Field

[0001] The utility model relates to the technical field of power plant foam treatment equipment, and more specifically, to a physical defoaming device and power plant foam treatment equipment. Background Art

[0002] The seawater circulating cooling system of coastal power plants in China usually adopts the direct intake and direct discharge method and is accompanied by the inhibition of marine organisms in the cooling water system. Water jump will occur at the end of the overflow weir of the siphon well in the cooling water discharge, and a large amount of air is incorporated into the violently swirling water flow, generating a large amount of seawater foam that enters the drainage site. In the cooling water system, organic substances such as biological residues and proteins generated by the inhibition of marine organisms promote the formation stability of seawater foam. A large amount of white to yellowish foam accumulates and can form a spongy continuous state floating on the water surface, resulting in the foam not being easily extinguished naturally in a short time. The seawater foam is composed of natural substances and is harmless in itself, but when a large amount of foam is discharged into the receiving sea area and floats on the sea surface in a large area, it will cause visual pollution.

[0003] The national standard "GB / T39361-2020 Requirements for Seawater Cooling Water Discharge" requires that "seawater cooling water discharge shall not cause oil films, floating foams and other floating substances on the surface of the receiving water body". The national standard "GB3097-1997 Seawater Quality Standard" also has clear regulations on the floating substances in the first, second, third, and fourth categories of seawater quality that "there shall be no (or no obvious) oil films, floating foams and other floating substances on the sea surface".

[0004] To carry out drainage foam treatment, the current common practice in domestic coastal power plants is to build a chemical defoaming system and add defoamers to the drainage for defoaming. Chemical defoaming is to destroy the stability of foam or inhibit the formation of foam by continuously adding defoamers, so as to achieve the purpose of eliminating foam. Although the method is mature, simple and effective, the defoaming method of adding chemical agents has the disadvantages and risks of high procurement cost of bulk chemicals, long procurement cycle, long-term occupation of inventory space, large consumption of defoamers, poor applicability of defoaming ability, and low environmental protection, which is not conducive to the economic and environmental protection operation of power plants. Content of the Utility Model

[0005] The purpose of the utility model is to provide a physical defoaming device and power plant foam treatment equipment to solve the technical problems of high defoaming cost and low environmental protection in the prior art.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is:

[0007] In the first aspect, a physical defoaming device is provided, including:

[0008] A trestle, a foam interception net connected to the trestle, a spray pipeline provided on the trestle, and a plurality of spray heads for spraying water provided on the spray pipeline; wherein, the trestle is used to be erected on a drainage site; the foam interception net is used to be arranged on the drainage site so that the foam on the drainage site can be collected in the foam interception net; the spray pipeline is arranged close to the foam interception net and is used to extract the water on the drainage site and transport it to the spray heads; the plurality of spray heads are arranged in sequence along the extension direction of the foam interception net.

[0009] By adopting the above technical solution, a trestle is built around the drainage site (such as the drainage outlet of a drainage channel or inside the drainage channel), which facilitates the erection of the spray pipeline and the fixation of the foam interception net, and the trestle can also facilitate the safe maintenance work of personnel; by setting a foam interception net on the drainage site, the foam at the drainage site can be intercepted and collected, improving the interception efficiency of the foam; by spraying the water curtain at a high speed from the spray heads onto the foam gathered on the water surface below the trestle, the goal of quickly and centrally spraying to eliminate foam is achieved; it can directly replace chemical defoamers, is pollution-free to the environment, environmentally friendly and economical, and is a pure physical defoaming method.

[0010] In one embodiment, the shape of the foam interception net is arc-shaped, the deviation direction of the arc is the same as the drainage direction of the drainage site, and both ends of the foam interception net are respectively connected to both banks of the drainage site.

[0011] By adopting the above technical solution, the influence of the foam interception net being impacted by the water flow is reduced, and at the same time, the efficiency of the foam interception net intercepting foam is improved.

[0012] In one embodiment, the physical defoaming device further includes a plurality of cables connecting the foam interception net and the trestle, and the plurality of cables are arranged in sequence along the arc length direction of the foam interception net.

[0013] By adopting the above technical solution, a plurality of cables connect the trestle and the foam interception net, making the connection between the trestle and the foam interception net flexible and capable of relatively moving within a certain range, reducing the influence of water flow impact on the foam interception net, and improving the service life of the foam interception net.

[0014] In one embodiment, the shape of the spray pipeline is arc-shaped, the deviation direction of the arc is the same as the drainage direction of the drainage site, and the spray pipeline is located on the upstream side of the foam interception net.

[0015] By adopting the above technical solution, the spraying range of the spray heads on the spray pipeline covers the foam on the upstream side of the foam interception net.

[0016] In one embodiment, the distance between two adjacent spray heads is a preset distance, and the preset distance gradually increases from the middle to both ends of the spray pipeline.

[0017] By adopting the above technical solution, the arrangement density of the multiple sprinkler heads is adapted to the foam density of the bubble screen, thereby improving the accuracy of the sprinkler head coverage range.

[0018] In one embodiment, the physical defoaming device includes a plurality of the spray pipes, two adjacent spray pipes are arranged in parallel and spaced apart, and each spray pipe is provided with a plurality of the spray heads; or, multiple rows of the spray heads are provided on the spray pipe, two adjacent rows of the spray heads are spaced apart, and each row of the spray heads includes a plurality of the spray heads.

[0019] By adopting the above technical solution, the flexibility of adjusting the spray range is improved.

[0020] In one embodiment, the spray pipe is provided with a submersible pump, which is used to dive under the water surface of the drainage place to pump water for spraying.

[0021] By adopting the above technical solution, the water outflow force of the sprinkler head can be adjusted, which is suitable for bursting different types of foam.

[0022] In one embodiment, the shape of the trestle is arc-shaped, the deviation direction of the trestle is the same as the drainage direction of the drainage place, and both ends of the trestle are respectively connected to two banks of the drainage place.

[0023] By adopting the above technical solution, the location of the bubble screen is convenient for maintenance.

[0024] In one embodiment, the pier includes piers, a bridge deck and guardrails, the piers are used to be erected in the drainage place, the bridge deck is erected on the piers, and the guardrails are arranged on the bridge deck.

[0025] By adopting the above technical solution, the structure and installation method of the physical defoaming device are simple and highly reliable.

[0026] In a second aspect, a power plant foam control device is provided, comprising a drainage place and the above-mentioned physical defoaming device, wherein the physical defoaming device is arranged on the drainage place.

[0027] By adopting the above technical solutions, the power plant foam treatment equipment of this embodiment has the following advantages: 1. The device has a simple structure and high reliability, and can cope with the influence of the sea area environment and tide level; 2. It is convenient to operate and does not require professional personnel to operate; 3. It has strong defoaming ability, can be applied to various difficult-to-remove foam situations, and can quickly and effectively eliminate foam; 4. It is green and environmentally friendly; 5. The operation and maintenance cost is low. The submersible pump is used to directly extract seawater locally for spraying and defoaming, without consuming fresh water resources; 6. The daily maintenance work is simple, and the spray head is convenient to disassemble and replace; 7. No personnel are required to be on duty during the operation process, which greatly saves manpower; 8. This physical defoaming device and method have strong site applicability, can be installed in drainage sites, and are easy to promote. It can be applied to both coastal nuclear power plants and thermal power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 is a three-dimensional structure diagram of the physical defoaming device provided by the embodiment of the present invention.

[0030] Figure 2 is a top view of the physical defoaming device provided by the embodiment of the present invention.

[0031] The reference numerals in the drawings are as follows:

[0032] 1, trestle; 2, foam barrier net; 3, spray pipeline; 4, spray head; 5, cable; 6, submersible pump;

[0033] 10, drainage site; X, drainage direction;

[0034] 11, pier; 12, bridge deck; 13, guardrail. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following further describes the present invention in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected or indirectly connected to the other element.

[0037] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model, rather than indicating that the device or component must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating relative importance or indicating the quantity of technical features. In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined. The following describes the specific implementation of the present utility model in more detail with reference to specific embodiments:

[0039] As Figure 1 and Figure 2 shown, a physical defoaming device provided by an embodiment of the present utility model includes:

[0040] A trestle 1, a foam interception net 2 connected to the trestle 1, a spray pipe 3 provided on the trestle 1, and a plurality of spray heads 4 for spraying water provided on the spray pipe 3; wherein, the trestle 1 is used to be erected on a drainage site 10; the foam interception net 2 is used to be arranged on the drainage site 10 so that the foam on the drainage site 10 can be collected in the foam interception net 2; the spray pipe 3 is arranged close to the foam interception net 2 and is used to extract the water from the drainage site 10 and transport it to the spray heads 4; the plurality of spray heads 4 are arranged in sequence along the extension direction of the foam interception net 2.

[0041] Here, it can be understood that the trestle 1 refers to a structure that can allow maintenance personnel to walk and arrange physical defoaming components. The trestle 1 is used to be erected on the drainage site 10; for example, the trestle 1 spans across both banks of the drainage site 10 of a power plant. Of course, in actual application scenarios, the trestle 1 can be arranged according to the actual terrain, for example, arranged on both banks of the drainage site;

[0042] The foam interception net 2 refers to a floating member for intercepting foam; the foam interception net 2 is connected to the trestle 1 and is used to be arranged on the drainage site 10; for example, since the foam floats on the water surface, the foam interception net 2 is arranged on the water surface, so that the foam flows towards the foam interception net 2 under the action of the drainage direction X, and the foam is blocked by the foam interception net 2 and concentrated on the upstream side of the foam interception net 2;

[0043] The spray pipe 3 refers to a pipe for transporting water to the spray heads 4; the spray pipe 3 is provided on the trestle 1. The setting of the spray pipe 3 is used to install the spray heads 4 and to transport the water from the drainage site to the spray heads 4;

[0044] The spray head 4 refers to a component for spraying water; a plurality of spray heads 4 are arranged on the spray pipeline 3, and the plurality of spray heads 4 are arranged in sequence along the extending direction of the foam-blocking net 2; for example, the spray pipeline 3 is used to convey the water in the drainage site 10 to each spray head 4, and the spray head 4 sprays the water onto the foam near the foam-blocking net 2, causing the foam to break.

[0045] The working principle of the physical defoaming device provided in this embodiment is as follows:

[0046] The physical defoaming device can be arranged on the drainage site 10 of a power plant (such as the drainage outlet of a drainage canal or inside the drainage canal). Of course, in actual application scenarios, the physical defoaming device of this embodiment can be arranged in a place where foam needs to be eliminated, such as the drainage site 10 of a nuclear power plant or a thermal power plant; this embodiment is described with the drainage site 10 of a power plant: the drainage site 10 discharges the water of the power plant, a trestle 1 is erected above the drainage site 10, the foam-blocking net 2 is placed on the drainage site 10 and on the water surface, and the foam-blocking net 2 is connected to the trestle 1. The trestle 1 enables the foam-blocking net 2 to remain relatively fixed with respect to the trestle 1 under the impact of the water flow. In this way, the foam flows towards the foam-blocking net 2 under the drive of the water flow, and the foam-blocking net 2 intercepts the foam in a relatively fixed area; the spray pipeline 3 is arranged on the trestle 1, and a plurality of spray heads 4 are arranged in sequence along the extending direction of the foam-blocking net 2. In this way, the spraying range of the plurality of spray heads 4 covers the foam gathered in the foam-blocking net 2. Since the foam is concentrated on the upstream side of the foam-blocking net 2, the spray head 4 can concentrate on spraying the foam, causing the foam to break.

[0047] The physical defoaming device of this embodiment has the following advantages:

[0048] Building a trestle 1 around the drainage site 10 facilitates the erection of the spray pipeline 3 and the fixation of the foam-blocking net 2, and the trestle 1 can also facilitate the safe maintenance work of personnel; by setting the foam-blocking net 2 on the drainage site 10, the foam at the drainage site 10 is intercepted and gathered, improving the foam interception efficiency; by spraying the water curtain at a high speed towards the foam gathered on the water surface below the trestle 1 through the spray head 4, the goal of rapid and concentrated spray defoaming is achieved; it can directly replace chemical defoamers, is pollution-free to the environment, environmentally friendly and economical, and is a pure physical defoaming method.

[0049] Furthermore, the spray head 4 can be connected to the spray pipeline 3 in a threaded manner, so that it is convenient for maintenance personnel to disassemble and replace the spray head 4.

[0050] In one embodiment, the shape of the foam-blocking net 2 is arc-shaped, the deviation direction of the arc is the same as the drainage direction X of the drainage site 10, and both ends of the foam-blocking net 2 are respectively connected to both banks of the drainage site 10.

[0051] Here, it can be understood that since the foam-blocking net 2 is arranged on the water surface of the drainage site 10, the flowing water of the drainage site 10 has a certain impact on the foam-blocking net 2. The foam-blocking net 2 is set as an arc-shaped foam-blocking net 2 to reduce the impact of the flowing water of the drainage site 10 on the foam-blocking net 2. At the same time, when the foam-blocking net 2 is set as an arc, the deviation direction of the arc is the same as the drainage direction X of the drainage site 10, that is, the protruding direction of the foam-blocking net 2 is the same as the drainage direction X of the drainage site 10. In this way, the foam on the water surface is intercepted by the foam-blocking net 2 and gradually converges to the middle part of the foam-blocking net 2. The two ends of the foam-blocking net 2 are respectively connected to the two banks of the drainage site 10. In this way, the foam-blocking net 2 can intercept the foam between the two banks of the drainage site 10 and converge to the middle part of the foam-blocking net 2.

[0052] By adopting the above technical solution, the influence of the foam-blocking net 2 being impacted by the water flow is reduced, and at the same time, the efficiency of the foam-blocking net 2 intercepting foam is improved.

[0053] In one embodiment, the physical defoaming device further includes a plurality of cables 5 connecting the foam-blocking net 2 and the trestle 1, and the plurality of cables 5 are arranged in sequence along the arc length direction of the foam-blocking net 2.

[0054] Here, it can be understood that the cable 5 is tensioned at an oblique upward angle to connect the foam-blocking net 2 to the trestle 1. Specifically, since the trestle 1 is erected above the water surface of the drainage site 10 and the foam-blocking net 2 floats on the water surface, there is a height difference between the trestle 1 and the foam-blocking net 2. One end of the cable 5 is connected to the foam-blocking net 2, and the other end of the cable 5 is connected to the trestle 1. The cable 5 extends obliquely from the foam-blocking net 2 towards the trestle 1. In this way, the cable 5 can pull the foam-blocking net 2 to make the foam-blocking net 2 fixed relative to the trestle 1, so that the foam-blocking net 2 can float on the water surface and intercept foam. The plurality of cables 5 respectively pull different parts of the foam-blocking net 2, so that the foam-blocking net 2 can be in an arc shape under the action of the water flow. In addition, the cable 5 is a flexible structure, so that the foam-blocking net 2 and the trestle 1 are flexibly connected, and the foam-blocking net 2 can move relative to the trestle 1 within a small range, which is beneficial to reducing the impact of the water flow on the foam-blocking net 2 and improving the service life of the foam-blocking net 2.

[0055] It needs to be further explained that the foam-blocking net 2 has a suitable length, and under the combined action of the impact of the water flow, the cables 5 connecting the two banks of the drainage site 10 and the fixing of the middle cable 5, it naturally forms an approximate semi-circular shape and completely surrounds the drainage site 10, thereby improving the foam interception efficiency.

[0056] In addition, considering the historical low and high tide levels of the water area where the power plant is located, the cables 5 of the foam-blocking net 2 are reserved with an appropriate length to ensure that the foam-blocking net 2 can move freely on the water surface with the change of the tide level. The variation range of the foam-blocking net 2 from the outer side of the trestle 1 in the horizontal direction is between 1.0 m and 5.5 m.

[0057] By adopting the above technical solution, multiple cables 5 connect the trestle 1 and the foam barrier net 2, enabling a flexible connection between the trestle 1 and the foam barrier net 2 and allowing relative movement within a certain range, reducing the impact of water flow on the foam barrier net 2 and extending the service life of the foam barrier net 2.

[0058] In one embodiment, the foam barrier net 2 of this embodiment is a floating - type foam barrier net 2, which is formed by tightly connecting one - section - by - one - section smooth and durable plastic solid floats through submarine cables 5. The foam barrier net 2 partially sinks below the water surface by its own gravity, and the height above the water surface is not less than 50 cm.

[0059] In one embodiment, the shape of the spray pipe 3 is arc - shaped, and the deviation direction of the arc is the same as the drainage direction X of the drainage site 10. The spray pipe 3 is located on the upstream side of the foam barrier net 2.

[0060] Here, it can be understood that the shape of the spray pipe 3 is adapted to the shape of the trestle 1, and both are arc - shaped, that is, their extending directions are the same; since the foam gathers on the upstream side of the foam barrier net 2, in order to make the spray range cover the foam, the spray pipe 3 is arranged on the upstream side of the foam barrier net 2, which is conducive to installing the spray heads 4 and making the spray range of the spray heads 4 cover the foam.

[0061] By adopting the above technical solution, the spray range of the spray heads 4 on the spray pipe 3 covers the foam located on the upstream side of the foam barrier net 2.

[0062] In one embodiment, the distance between two adjacent spray heads 4 is a preset distance, and the preset distance gradually increases from the middle to both ends of the spray pipe 3.

[0063] Here, it can be understood that since the shape of the foam barrier net 2 is arc - shaped, in this way, the foam shows a situation where there is relatively less foam on both sides of the foam barrier net 2 and more foam in the middle of the foam barrier net 2 under the action of water flow and the foam barrier net 2; therefore, the number of spray heads 4 near the middle of the foam barrier net 2 is more than the number of spray heads 4 near both sides of the foam barrier net 2, so that the spray heads 4 can adapt to the quantity of the foam. Therefore, the installation spacing between two spray heads 4 gradually increases from the middle to both ends of the spray pipe 3, making the spray heads 4 densely cover the middle part of the foam barrier net 2.

[0064] By adopting the above technical solution, the arrangement density of multiple spray heads 4 is adapted to the foam density on the upstream side of the foam barrier net 2, improving the accuracy of the coverage range of the spray heads 4.

[0065] In one embodiment, the spray head 4 of this embodiment is a fan - shaped spray head 4, which adopts a fine - nozzle slit - width duck - bill type nozzle. In this way, the spray range of the spray head 4 is fan - shaped, expanding the coverage degree of the spray range of the spray head 4.

[0066] In one embodiment, the physical defoaming device includes a plurality of spray pipes 3, with two adjacent spray pipes 3 arranged in parallel at intervals, and a plurality of spray heads 4 are provided on each spray pipe 3; alternatively, multiple rows of spray heads 4 are provided on the spray pipe 3, with two adjacent rows of spray heads 4 arranged at intervals, and each row of spray heads 4 includes a plurality of spray heads 4.

[0067] Here, it can be understood that in order to increase the spray range, the physical defoaming device can be provided with multiple rows of spray heads 4, and at the same time, the number of rows of spray heads 4 to be turned on can be determined according to the amount of foam. That is, when the foam is less, a single row of spray heads 4 can be turned on alone; while when the foam is more, multiple rows of spray heads 4 can be turned on to improve the spray range and efficiency.

[0068] Optionally, at least two rows of spray heads 4 are arranged on both sides of the trestle 1 in the passing direction, that is, on both sides in the drainage direction X.

[0069] By adopting the above technical solution, the flexibility of adjusting the spray range is improved.

[0070] In one embodiment, the spray pipe 3 is provided with a submersible pump 6, and the submersible pump 6 is used to dive under the water surface of the drainage site 10 to extract water for spraying.

[0071] Here, it can be understood that the submersible pump 6 in this embodiment can be a variable-frequency submersible pump 6, which adopts variable-frequency technology to adjust the water outlet head and flow rate of the submersible pump 6, so that the water outflow force of the spray head 4 is controlled within the range of 0.1 Mpa to 0.2 Mpa.

[0072] By adopting the above technical solution, the water outflow force of the spray head 4 is adjustable, which is suitable for different foam situations.

[0073] In one embodiment, the shape of the trestle 1 is arc-shaped, the deviation direction of the trestle 1 is the same as the drainage direction X of the drainage site 10, and both ends of the trestle 1 are respectively connected to both banks of the drainage site 10.

[0074] Here, it can be understood that the shape of the trestle 1 adapts to the shape of the foam-blocking net 2, and both of them are arc-shaped, and the trestle 1 and the foam-blocking net 2 are arranged in parallel at intervals; optionally, the foam-blocking net 2 is located on the downstream side of the trestle 1 in the drainage direction X, so that it is convenient for the maintenance personnel on the trestle 1 to maintain the foam-blocking net 2.

[0075] By adopting the above technical solution, the installation position of the foam-blocking net 2 is beneficial to maintenance.

[0076] In one embodiment, the trestle 1 includes pier 11, bridge deck 12 and guardrail 13. The pier 11 is used to stand in the drainage site 10, the bridge deck 12 is erected on the pier 11, and the guardrail 13 is arranged on the bridge deck 12.

[0077] Here, it can be understood that the installation and working principle of the physical defoaming device in this embodiment are as follows: In the peripheral waters at an appropriate distance from the drainage site 10, the underwater piers 11 are driven into the seabed soil layer and fixed in a semi-circular arrangement. The trestle 1 is connected in a multi-segment line form to form a semi-circular whole that surrounds the drainage site 10. The two ends of the trestle 1 are fixed on the embankment and a passage entrance is left. The water surface section of the trestle 1 is fixed above the water on the underwater piers 11. Guardrails are installed on both sides of the trestle 1. A spray pipe 3 is fixed along the outer edges of the left and right sides of the bridge deck 12 respectively. A fan-shaped spray head 4 is installed at different intervals at the bottom of the spray pipe 3. The floating bubble-blocking net 2 is installed on the water surface near the outside of the trestle 1. The left and right ends of the bubble-blocking net 2 are fixed on the embankment through the end cables 5. An intermediate cable 5 is arranged at a certain interval on the bubble-blocking net 2. The intermediate cable 5 is tensioned and fixed to the trestle 1 at an oblique upward angle. When the physical defoaming device works, the submersible pump 6 extracts seawater locally and sends it into the spray pipe 3 through the water delivery pipeline. The water flow continuously sprays vertically downward at a high speed from the fan-shaped nozzles, forming a continuous water curtain to quickly break the foam gathered on the water surface, achieving the goal of defoaming.

[0078] Optionally, the height of the underwater pier 11 exposed above the water surface is 2 meters higher than the historical high tide level of the sea area of the drainage site 10. The width of the bridge deck 12 of the trestle 1 ranges from 1.5 meters to 3.5 meters, which is convenient for personnel to pass, transport materials and carry out operation and maintenance work.

[0079] By adopting the above technical solutions, the structure and installation method of the physical defoaming device are simple and highly reliable.

[0080] In the second aspect, a power plant foam treatment device is provided, including a drainage site 10 and the above-mentioned physical defoaming device, and the physical defoaming device is arranged on the drainage site 10.

[0081] The power plant foam treatment device in this embodiment has the following advantages: 1. The device has a simple structure and high reliability, and can cope with the influence of the sea area environment and tide level; 2. It is convenient to operate and does not require professional personnel to operate; 3. It has strong defoaming ability, can be applied to various difficult-to-eliminate foam situations, and can quickly and effectively eliminate foam; 4. It is green and environmentally friendly; 5. The operation and maintenance cost is low. The submersible pump 6 directly extracts seawater locally for spraying and defoaming, without consuming fresh water resources; 6. The daily maintenance work is simple, and the spray head 4 is convenient to disassemble and replace; 7. No personnel are required to be on duty during the operation process, which greatly saves manpower; 8. The physical defoaming device and method have strong site adaptability, can be installed in the drainage site 10 (such as the drainage outlet or inside the drainage channel of the drainage canal), are easy to promote, and can be applied to both coastal nuclear power plants and thermal power plants.

[0082] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A physical defoaming device, characterized in that, Including: A trestle, a foam-blocking net connected to the trestle, a spray pipe disposed on the trestle, and a plurality of spray heads for spraying water disposed on the spray pipe; wherein, the trestle is used to be erected on a drainage site; the foam-blocking net is used to be arranged on the drainage site so that the foam on the drainage site can be collected in the foam-blocking net; the spray pipe is disposed close to the foam-blocking net and is used to extract the water on the drainage site and transport it to the spray heads; the plurality of spray heads are arranged in sequence along the extending direction of the foam-blocking net.

2. The physical defoaming device according to claim 1, wherein The shape of the foam-blocking net is arc-shaped, the deviation direction of the arc is the same as the drainage direction of the drainage site, and both ends of the foam-blocking net are respectively connected to both banks of the drainage site.

3. The physical defoaming device according to claim 2, characterized in that, The physical defoaming device further includes a plurality of cables connecting the foam-blocking net and the trestle, and the plurality of cables are arranged in sequence along the arc length direction of the foam-blocking net.

4. The physical defoaming device according to claim 2, wherein, The shape of the spray pipe is arc-shaped, the deviation direction of the arc is the same as the drainage direction of the drainage site, and the spray pipe is located on the upstream side of the foam-blocking net.

5. The physical defoaming device according to claim 4, characterized in that, The distance between two adjacent spray heads is a preset distance, and the preset distance gradually increases from the middle of the spray pipe to both ends.

6. The physical defoaming device according to claim 4, wherein, The physical defoaming device includes a plurality of the spray pipes, two adjacent spray pipes are arranged in parallel at intervals, and a plurality of the spray heads are arranged on each spray pipe; or, a plurality of rows of the spray heads are arranged on the spray pipe, two adjacent rows of the spray heads are arranged at intervals, and each row of the spray heads includes a plurality of the spray heads.

7. The physical defoaming device according to claim 4, characterized in that, The spray pipe is provided with a submersible pump, and the submersible pump is used to dive under the water surface of the drainage site to extract water for spraying.

8. The physical defoaming device according to any one of claims 1 to 6, characterized in that The shape of the trestle is arc-shaped, the deviation direction of the trestle is the same as the drainage direction of the drainage site, and both ends of the trestle are respectively connected to both banks of the drainage site.

9. The physical defoaming device according to claim 8, characterized in that, The trestle includes piers, a bridge deck and guardrails, the piers are used to be erected in the drainage site, the bridge deck is erected on the piers, and the guardrails are disposed on the bridge deck.

10. A power plant foam treatment device, characterized in that, Including a drainage site and the physical defoaming device according to any one of claims 1 to 9, and the physical defoaming device is arranged on the drainage site.

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