Marine organism removing structure for taking water from cold source of nuclear power plant

Abstract

The utility model discloses a nuclear power plant cold source water taking marine organism removing structure which comprises a dissolving cavity, a stabilizing pipe, a floating pool and a cold source water taking culvert which are sequentially connected, the dissolving cavity is provided with a water inlet and further provided with a plurality of connectors connected with a carbon dioxide gas source, the cold source water taking culvert is provided with a water flow channel, and the water flow channel is communicated with the stabilizing pipe. The cold source water intake culvert is provided with a marine organism suction platform located above the water flow channel. By means of the nuclear power plant cold source water taking marine organism removing structure, a plurality of intercepting nets with different hole diameters do not need to be arranged in the breakwater, and the structure is simple. Most marine organisms can float, gather and suck, the marine organism cleaning efficiency is high, manual operation can be reduced, and the operation safety of a nuclear power unit can be effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a marine organism removal structure for cold source water intake of a nuclear power plant. Background Art

[0002] In terms of measures to deal with cold source risks, the mainstream method currently adopted at home and abroad is interception and salvage. Various methods are used to intercept and promptly salvage disaster-causing objects entering the cold source area of ​​the power plant. The common cold source water intake and marine organism removal structures in front of the forepool of the nuclear power plant are as follows from the outside to the inside according to the direction of water flow: a gate net connected to the breakwater of the nuclear power plant, one or several pollution nets of different sizes and with the net surface basically perpendicular to the direction of water flow, or a mechanized cleaning platform (including nets).

[0003] The above existing water intake structure has the following disadvantages:

[0004] (1) There are many types of nets. Nuclear power plants need to prepare a variety of nets with different diameters and sizes, and the procurement and inventory process is cumbersome. (2) The cost of personnel and materials for cleaning marine organisms is high. Nuclear power plants need to invest a lot of manpower (divers going into the water, driving boats to manually clean nets, etc.) and materials (boats, nets, etc.) to continuously clean marine organisms. Nets are generally made of soft materials, which are easy to break and need to be replaced frequently. (3) The risk of cooling source failure is high. If marine organisms are not cleaned in time, they will enter the power plant and gather in the drum net, which will cause the cooling source to fail, resulting in power reduction or machine or reactor tripping. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a marine growth removal structure for cold source water intake of a nuclear power plant.

[0006] The technical solution adopted by the utility model to solve its technical problems is: constructing a nuclear power plant cold source water intake marine organism removal structure, including a dissolution chamber, a stabilization pipe, a floating pool and a cold source water intake culvert connected in sequence, the dissolution chamber has a water inlet, and the dissolution chamber is also provided with a plurality of interfaces connected to the carbon dioxide gas source, the cold source water intake culvert is provided with a water flow channel, and the cold source water intake culvert is provided with a marine organism suction platform located above the water flow channel.

[0007] In some embodiments, the cross-sectional area of ​​the floating pool gradually decreases from a side close to the stabilization tube to a side close to the cold source water intake culvert.

[0008] In some embodiments, the stabilizing tube is hollow cylindrical.

[0009] In some embodiments, the upper end of the floating pool is arranged flush with the upper end of the cold source water intake culvert.

[0010] In some embodiments, the number of the interfaces is four.

[0011] In some embodiments, the cold source water intake culvert is provided with at least one interception net.

[0012] In some embodiments, the interception net is a metal interception net.

[0013] In some embodiments, the mesh size of the interception net is less than 3 mm.

[0014] In some embodiments, an underwater heater is provided at the outlet of the stabilizing tube.

[0015] In some embodiments, a control valve is provided on the interface.

[0016] The implementation of this utility model has the following beneficial effects: Application of this marine growth removal structure for nuclear power plant cold source water intake eliminates the need for multiple interception nets of varying apertures within the breakwater, resulting in a relatively simple structure. This structure allows most marine growth to float, gather, and be sucked out, resulting in highly efficient marine growth removal, reduced manual labor, and effective assurance of nuclear power unit operation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can derive other relevant drawings based on these drawings without inventive effort. In the drawings:

[0018] Figure 1 It is a structural schematic diagram of a marine growth removal structure for cold source water intake of a nuclear power plant in some embodiments of the present invention. DETAILED DESCRIPTION

[0019] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the 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", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing 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 limiting the present invention.

[0020] 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, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium, and they can be internal connections between two elements or interactions 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", and "third" are only used to facilitate the description of 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, features defined as "first", "second", and "third" can explicitly or implicitly include one or more of these 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 specific circumstances.

[0021] 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.

[0022] See Figure 1 This utility model discloses a marine growth removal structure for a nuclear power plant's cold water intake. The structure can be deployed within the plant's cold water intake breakwater. The breakwater's water inlet is equipped with a conventional interception net to intercept larger marine organisms and debris. The rear end of the structure is connected to the plant's pump station forebay, and at least one interception net with a pore size of 3 mm or less can be installed at the rear end.

[0023] The nuclear power plant cold source water intake marine growth removal structure may include a dissolution chamber 10, a stabilization pipe 20, a floating pool 30, and a cold source water intake culvert 40, which are connected in sequence. The dissolution chamber 10 has a water inlet 11. The dissolution chamber 10 is also provided with a plurality of interfaces 12 connected to a carbon dioxide gas source. The interfaces 12 are provided with control valves to control the flow rate and flow of the carbon dioxide gas. Preferably, there are four interfaces 12. Preferably, the interfaces 12 are connected to the carbon dioxide gas source (carbon dioxide gas storage tank or carbon dioxide gas generation system) via pipelines. The interfaces 12 or the pipelines may be provided with flow meters.

[0024] The cold source water intake culvert 40 is provided with a water flow channel 41. The cold source water intake culvert 40 is provided with a marine life suction platform 42 located above the water flow channel 41. The marine life suction platform 42 is below the lowest sea level of the sea area. The floating pool 30 and the marine life suction platform 42 are connected to the atmosphere.

[0025] In some embodiments, the highest point of the dissolution chamber 10 is lower than the lowest sea level of the sea area where it is located. The dissolution chamber 10 can be constructed of concrete and can be a roughly spherical structure.

[0026] In some embodiments, the cross-sectional area of ​​the floating pool 30 gradually decreases from the side near the stabilizing tube 20 to the side near the cold source water intake culvert 40, thereby providing a diversion effect. Furthermore, the floating pool 30 is generally triangular or trapezoidal in shape. The floating pool 30 may be constructed of concrete.

[0027] In some embodiments, the stabilizing tube 20 is used to stabilize the gas-liquid flow. The stabilizing tube 20 may be in the shape of a hollow cylinder. An underwater heater is provided at the outlet of the stabilizing tube 20 to heat the seawater.

[0028] In some embodiments, the upper end of the floating pool 30 is flush with the upper end of the cold source water intake culvert 40. The cold source water intake culvert 40 is a roughly cubic structure and can be constructed of concrete.

[0029] In some embodiments, the cold source water intake culvert 40 is provided with at least one interception net. The interception net is a metal interception net, which may include, but is not limited to, a copper alloy mesh or a high-strength zinc-aluminum alloy mesh. Metal isolation nets are durable. Preferably, the mesh size of the interception net is less than 3 mm.

[0030] The application of marine growth removal structure for cold source water intake of nuclear power plants is as follows:

[0031] (1) The nuclear power plant is located in the sea area. The seawater enters the nuclear power plant port through the nuclear power plant cold source water intake gate network. The seawater in the nuclear power plant port flows into the dissolution cavity 10.

[0032] (2) Low-temperature carbon dioxide gas (lower than ambient temperature) is introduced into the dissolution chamber 10 , and the carbon dioxide flow rate can be controlled by a control valve to increase the seawater pressure in the dissolution chamber 10 .

[0033] (3) Carbon dioxide gas is dissolved in the seawater (with marine organisms) in the dissolution chamber 10 .

[0034] (4) Seawater and undissolved carbon dioxide gas pass through the stabilizing tube 20 to stabilize the gas-liquid flow rate and process. Undissolved carbon dioxide is in the upper layer and seawater is in the lower layer.

[0035] (5) When the gas-liquid flow reaches the floating pool 30, the undissolved carbon dioxide gas rises and enters the ambient air. The seawater is depressurized and heated in the floating pool 30, and the dissolved carbon dioxide gas in the seawater is precipitated, and carbon dioxide bubbles are also generated in the marine organisms.

[0036] (6) Marine organisms float up due to the adsorption and buoyancy of carbon dioxide bubbles released from seawater and the buoyancy of carbon dioxide gas in the bodies of marine organisms.

[0037] (7) In the floating pool 30, the marine organisms float and gather on the surface of the seawater. After reaching the marine organism suction platform 42, a water pump can be used to pump the marine organisms ashore or discharge them outside the harbor.

[0038] (8) The lower seawater of the floating pool 30 is transported to the forebay of the nuclear power plant pump station through the cold source water intake culvert 40. During this process, an interception net with a pore size of less than 3mm can be added to intercept marine organisms depending on the residual amount of marine organisms.

[0039] Understandably, the nuclear power plant's cold source water intake and marine organism removal structure uses the principle that the solubility of gas in water decreases after heating and reducing pressure, and precipitates bubbles to support floating marine organisms.

[0040] Understandably, the application of this marine growth removal structure for nuclear power plant cooling water intake has the following advantages: It eliminates the need for multiple interception nets of varying apertures within the breakwater, resulting in a relatively simple structure. It can float, aggregate, and extract most marine growth, resulting in highly efficient marine growth removal, reduced manual labor, and effective assurance of nuclear power unit operational safety.

[0041] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A structure for removing marine growth from a cold source water supply of a nuclear power plant, characterized in that: The invention comprises a dissolution chamber (10), a stabilization pipe (20), a floating pool (30), and a cold source water intake culvert (40) connected in sequence, wherein the dissolution chamber (10) has a water inlet (11), the dissolution chamber (10) is further provided with a plurality of interfaces (12) connected to a carbon dioxide gas source, the cold source water intake culvert (40) is provided with a water flow channel (41), and the cold source water intake culvert (40) is provided with a marine organism suction platform (42) located above the water flow channel (41); The floating pool (30) and the marine life extraction platform (42) are connected to the atmosphere; the floating pool (30) is constructed of concrete; An underwater heater is provided at the outlet of the stabilizing pipe (20) to heat the seawater; The interface (12) is provided with a control valve to control the flow rate and flow of carbon dioxide gas; the interface (12) is provided with a flow meter; The cold source water intake culvert (40) is provided with at least one interception net, which is a metal interception net; the mesh diameter of the interception net is less than 3 mm.

2. The structure for removing marine growth from cold water intake of a nuclear power plant according to claim 1, characterized in that: The cross-sectional area of ​​the floating pool (30) gradually decreases from a side close to the stabilizing pipe (20) to a side close to the cold source water intake culvert (40).

3. The marine growth removal structure for cold source water intake of a nuclear power plant according to claim 1, characterized in that: The stabilizing tube (20) is in the shape of a hollow cylinder.

4. The marine growth removal structure for cold water intake of a nuclear power plant according to claim 1, characterized in that: The upper end of the floating pool (30) is arranged flush with the upper end of the cold source water intake culvert (40).

5. The marine growth removal structure for cold water intake of a nuclear power plant according to claim 1, characterized in that: The number of the interfaces (12) is four.

Images