CN111609544A

CN111609544A - Water blocking member for cooler and cooling system for nuclear power station

Info

Publication number: CN111609544A
Application number: CN202010304529.8A
Authority: CN
Inventors: 吴春平; 彭耀军; 胡天奇; 许国兵; 刘自旺
Original assignee: China General Nuclear Power Corp; CGN Power Co Ltd; Daya Bay Nuclear Power Operations and Management Co Ltd; Lingdong Nuclear Power Co Ltd; Guangdong Nuclear Power Joint Venture Co Ltd; Lingao Nuclear Power Co Ltd
Current assignee: China General Nuclear Power Corp; CGN Power Co Ltd; Daya Bay Nuclear Power Operations and Management Co Ltd; Lingdong Nuclear Power Co Ltd; Guangdong Nuclear Power Joint Venture Co Ltd; Lingao Nuclear Power Co Ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2020-09-01

Abstract

The application relates to the technical field of nuclear power station nuclear island ventilation air-conditioning systems, and provides a water retaining piece for a cooler and a cooling system for a nuclear power station, wherein the water retaining piece comprises a box body, and the surface of the box body is provided with a first opening, a second opening, a third opening and a fourth opening; the cross section of the first water baffle is in a curve shape and is provided with a flow guide structure; an air channel is formed between two adjacent first water baffles, air flows into the air channel through the first opening, fine water drops in the air flow can form a water film on the surfaces of the first water baffles and then flow out of the third opening through the flow guide structure, and air in the air flow leaves the air channel through the second opening. Aqueous medium in the air has reduced the water droplet flow speed behind first breakwater, is detained on first breakwater surface, relies on gravity to flow, is convenient for collect and dredges, has effectively controlled the comdenstion water problem of splashing, has reduced the insulating low tripping operation scheduling risk of power plant motor instrument control equipment that the comdenstion water splashes and leads to, has improved the reliability of power plant equipment operation.

Description

Water blocking member for cooler and cooling system for nuclear power station

Technical Field

The application relates to the technical field of nuclear power station nuclear island ventilation air-conditioning systems, in particular to a water retaining member for a cooler and a cooling system for a nuclear power station.

Background

The cooler of the ventilation system of the nuclear auxiliary factory building of the nuclear power station can produce a large amount of condensed water when external high-temperature and high-humidity air passes through, the condensed water is entrained to a downstream motor room, the phenomenon of splashing of the condensed water exists in the motor room for a long time, multiple times of insulation and low tripping of motor equipment are caused, the design of the cooler has defects, and the generated condensed water cannot be effectively collected and dredged.

Disclosure of Invention

The technical problem that this application will be solved is to prior art's not enough, provides a cooling system for water blocking spare and nuclear power station for cooler.

According to a first aspect of the present application, there is provided a water deflector for a cooler, comprising:

the box body is provided with a cavity, the surface of the box body is provided with a first opening, a second opening, a third opening and a fourth opening, and the first opening, the second opening, the third opening, the fourth opening and the cavity are communicated;

the cross section of the first water baffle is in a curve shape, and the first water baffle is provided with a flow guide structure;

the first water baffles are vertically arranged in the cavity, an air channel is formed between every two adjacent first water baffles, air flow enters the air channel through the first opening, fine water drops in the air flow can form a water film on the surfaces of the first water baffles and then flow out of the third opening through the flow guide structure, and air in the air flow leaves the air channel through the second opening.

Further, the flow guide structure comprises one or more grooves arranged on the first water baffle, and the grooves longitudinally penetrate through the first water baffle.

Furthermore, the diversion structure further comprises a second water baffle arranged on the first water baffle, and the second water baffle is matched with the first water baffle and used for blocking the airflow in the air duct.

Further, the second water baffle comprises a substrate and an edge extending from the substrate to the wind inlet direction.

Further, the curved shape includes a wave shape or a zigzag shape.

Further, the second water baffle is arranged in the wave crest area of the first water baffle.

Furthermore, the box body is of a cuboid shape, and the first water baffles are arranged in the cavity in parallel and uniformly.

According to a second aspect of the present application, the present application provides a cooling system for a nuclear power station, comprising a cooler, a water collecting device, and the above water blocking member;

the cooler is used for refrigerating high-temperature and high-humidity air;

the water blocking piece is matched with the cooler and is arranged at the downstream of the cooler;

the water collecting device comprises a water collecting disc, and the water collecting disc is arranged below the third opening and used for collecting water drops flowing out of the water retaining piece.

Further, the water collecting device also comprises a drain pipe, the water collecting tray is provided with a drain hole, and the drain pipe is communicated with the drain hole.

Further, the water retaining pieces comprise an upper row and a lower row, the water collecting discs comprise two rows, one water collecting disc is arranged on the upper row and matched with the water retaining pieces, the other water collecting disc is matched with the lower row of the water retaining pieces, and the two water collecting discs are connected through the drain pipe.

Due to the adoption of the technical scheme, the beneficial effects of the application are as follows:

in the embodiment of the application, as the water baffle comprises a box body and a first water baffle plate, the surface of the box body is provided with a first opening, a second opening, a third opening and a fourth opening; the cross section of the first water baffle is in a curve shape and is provided with a flow guide structure, the first water baffle is vertically arranged in the cavity, an air channel is formed between two adjacent first water baffles, air flows into the air channel through the first opening, fine water drops in the air flow can form a water film on the surface of the first water baffle and then flow out of the third opening through the flow guide structure, and air in the air flow leaves the air channel through the second opening. After the water medium in the air passes through the first water baffle with the curved cross section, the water drop flowing speed is reduced, the water medium is retained on the surface of the first water baffle and flows out by gravity, so that collection and dredging are facilitated, the splashing problem of condensed water is effectively controlled, the risks of low tripping and the like of insulation of power plant motor instrument control equipment caused by splashing of the condensed water are reduced, and the operation reliability of the power plant equipment is improved.

Drawings

FIG. 1 is a schematic structural view of a water deflector according to one embodiment of the first embodiment;

FIG. 2 is a bottom view of the water deflector of the first embodiment in one embodiment;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

fig. 4 is a schematic structural view of a cooling system for a nuclear power plant in which a water collecting device is not provided according to a second embodiment from one perspective;

fig. 5 is a schematic structural diagram of a cooling system for a nuclear power plant according to a second embodiment from another perspective;

fig. 6 is a schematic structural view of a cooling system for a nuclear power plant according to a second embodiment from another perspective.

Detailed Description

The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. The present application may be embodied in many different forms and is not limited to the embodiments described in the present embodiment. The following detailed description is provided to facilitate a more thorough understanding of the present disclosure, and the words used to indicate orientation, top, bottom, left, right, etc. are used solely to describe the illustrated structure in connection with the accompanying figures.

One skilled in the relevant art will recognize, however, that one or more of the specific details can be omitted, or other methods, components, or materials can be used. In some instances, some embodiments are not described or not described in detail.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning.

Furthermore, the technical features, aspects or characteristics described herein may be combined in any suitable manner in one or more embodiments. It will be readily appreciated by those of skill in the art that the order of the steps or operations of the methods associated with the embodiments provided herein may be varied. Thus, any sequence in the figures and examples is for illustrative purposes only and does not imply a requirement in a certain order unless explicitly stated to require a certain order.

The first embodiment is as follows:

as shown in fig. 1 to 3, an embodiment of the water deflector 100 for a cooler of the present application includes a tank 110 and a first water deflector 120. The water stop 100 may be made of a metallic material, such as 304L stainless steel, and has corrosion resistance.

The case 110 is provided with a cavity, and the surface of the case 110 is provided with a first opening 111, a second opening 112, a third opening 113 and a fourth opening 114. The first opening 111 is an air inlet, the second opening 112 is an air outlet, and the first opening 111 and the second opening 112 are oppositely arranged. The third opening 113 is disposed at the bottom of the case 110, the fourth opening 114 is disposed at the top of the case 110, and the first opening 111, the second opening 112, the third opening 113, and the fourth opening 114 penetrate the cavity in the case 110. In one embodiment, the case 110 has a rectangular parallelepiped shape, and a plurality of first water baffles 120 are disposed in the cavity in parallel and uniformly.

The first water guard plate 120 may have a plurality of blocks, the cross section of the first water guard plate 120 is curved, and the first water guard plate 120 is provided with a flow guide structure.

The first water baffles 120 are vertically arranged in the cavity, an air duct 121 is formed between two adjacent first water baffles 120, air flows through the first opening 111 and enters the air duct 121 in the box body 110, fine water drops in the air flow can form a water film on the surface of the first water baffles 120 and then flow out from the third opening 113 through the flow guide structure, and the air in the air flow leaves the air duct 121 through the second opening 112, namely the air in the air flow leaves the box body 110. In one embodiment, the cross-section of the first baffle 120 may include a wave shape and a sawtooth shape, and the cross-section of the first baffle 120 may also be other shapes that can extend the air duct 121.

Further, the flow guide structure may include a groove 122, the groove 122 is disposed on the first water guard 120, one or more grooves 122 may be formed on one first water guard 120, and the groove 122 longitudinally penetrates the first water guard 120.

Further, the flow guiding structure may further include a second water baffle 123, the second water baffle 123 is disposed on the first water baffle 120, and the second water baffle 123 is matched with the first water baffle 120 to block the airflow in the air duct 121.

Further, the second water blocking plate 123 includes a base plate 1231 and a rim 1232, and the rim 1232 extends from the base plate 1231 to the wind inlet direction. The second water guard 123 is provided on the first water guard 120 to further reduce the flow speed of the water droplets to make the water droplets stay.

Further, the second water guard 123 may be disposed at a peak area of the first water guard 120. The second water guard 123 may be disposed at a peak of the first water guard 120 or a region adjacent to the peak.

The water retaining piece comprises a box body and a first water retaining plate, and a first opening, a second opening, a third opening and a fourth opening are formed in the surface of the box body; the cross section of the first water baffle is in a curve shape and is provided with a flow guide structure, the first water baffle is vertically arranged in the cavity, an air channel is formed between two adjacent first water baffles, air flows into the air channel through the first opening, fine water drops in the air flow can form a water film on the surface of the first water baffle and then flow out of the third opening through the flow guide structure, and air in the air flow leaves the air channel through the second opening. After the water medium in the air passes through the first water baffle with the curved cross section, the water drop flowing speed is reduced, the water medium is retained on the surface of the first water baffle and flows out by gravity, so that collection and dredging are facilitated, the splashing problem of condensed water is effectively controlled, the risks of low tripping and the like of insulation of power plant motor instrument control equipment caused by splashing of the condensed water are reduced, and the operation reliability of the power plant equipment is improved.

Example two:

as shown in fig. 1 to 6, the cooling system for a nuclear power plant of the present application includes a cooler 200, a water collecting device 300, and a water deflector 100 according to the first embodiment.

The cooler 200 serves to cool air having high temperature and high humidity. In the cooling system for a nuclear power plant of the present application, the existing cooler 200 is used, and the cooler 200 is not modified. The cooler 200 includes a water inlet 210, a water outlet 220, a core 230, and a heat exchange pipe 240. The high temperature and high humidity air enters the cooler 200, flows through the heat exchange tubes 240 of the core 230, and exchanges heat with the cooling water in the core 230, thereby lowering the temperature. The direction of arrows in fig. 5 and 6 is an air flow direction, and the hot air passes through the cooler 200 and enters the water blocking member 100.

The water deflector 100 is fitted to the cooler 200, and the water deflector 100 is disposed downstream of the cooler 200.

The water collecting device 300 includes a water collecting tray 310, and the water collecting tray 310 is disposed below the third opening 113 to collect water drops flowing out of the water guard 100.

The water deflector 100, one embodiment of which includes a case 110 and a first splash plate 120. The case 110 is provided with a cavity, and the surface of the case 110 is provided with a first opening 111, a second opening 112, a third opening 113 and a fourth opening 114. The first opening 111 is an air inlet, the second opening 112 is an air outlet, and the first opening 111 and the second opening 112 are oppositely arranged. The third opening 113 is disposed at the bottom of the case 110, the fourth opening 114 is disposed at the top of the case 110, and the first opening 111, the second opening 112, the third opening 113, and the fourth opening 114 penetrate the cavity in the case 110. In one embodiment, the case 110 has a rectangular parallelepiped shape, and a plurality of first water baffles 120 are disposed in the cavity in parallel and uniformly. The first opening 111 is matched with the air outlet of the cooler 200.

The first water guard plate 120 may have a plurality of blocks, the cross section of the first water guard plate 120 is curved, and the first water guard plate 120 is provided with a flow guide structure. The first water baffles 120 are vertically arranged in the cavity, an air duct 121 is formed between two adjacent first water baffles 120, air flows through the first opening 111 and enters the air duct 121 in the box body 110, fine water drops in the air flow can form a water film on the surface of the first water baffles 120 and then flow out from the third opening 113 through the flow guide structure, and the air in the air flow leaves the air duct 121 through the second opening 112, namely the air in the air flow leaves the box body 110. In one embodiment, the cross-section of the first baffle 120 may include a wave shape and a sawtooth shape, and the cross-section of the first baffle 120 may also be other shapes that can extend the air duct 121.

Further, the second water blocking plate 123 includes a base plate 1231 and a rim 1232, and the rim 1232 extends from the base plate 1231 to the wind inlet direction.

Further, the water collecting device 300 further includes a drain pipe 320, and the water collecting tray 310 is provided with a drain hole, which is communicated with the drain hole. In FIG. 5, water collected by the water collection tray 310

Furthermore, the water blocking pieces comprise an upper row and a lower row, the water collecting discs comprise two rows, one water collecting disc is arranged on the upper row and matched with the water blocking pieces, the other water collecting disc is matched with the lower row of the water blocking pieces, and the two water collecting discs are connected through the drain pipe. In fig. 5, the water collected in the upper row of the water collecting tray 310 is drained to the drain tank 410 through the drain pipe 320. In the present embodiment, two water stoppers are provided at the upper row and the lower row, respectively.

This application has designed one set of manger plate spare and the dish device that catchments that is used for the cooler, installs in cooler low reaches, and easy dismounting and flow resistance loss are little, do not influence system normal operating, can effectively solve the unable collection of condensate water among the nuclear power station nuclear auxiliary factory building ventilation system and dredge the problem. The water blocking piece is installed on a ventilation wall hole on the downstream of the cooler, each cooler can be matched with four unit water blocking pieces, the installation state and the function of the cooler are not influenced after the water blocking pieces are additionally installed, the cooler is not directly connected with the water blocking pieces, the cooler is freely assembled and disassembled, and the water blocking pieces can still be fixed on the ventilation wall after the cooler is disassembled. The bottom of the water retaining piece is provided with a water collecting disc, so that cooling water is drained to a drainage ditch along a drainage pipe of the water collecting disc.

The foregoing is a more detailed description of the present application in connection with specific embodiments thereof, and it is not intended that the present application be limited to the specific embodiments thereof. It will be apparent to those skilled in the art from this disclosure that many more simple derivations or substitutions can be made without departing from the spirit of the disclosure.

Claims

1. A water dam for a cooler, comprising:

2. The baffle of claim 1 wherein the deflector structure includes one or more grooves disposed in the first baffle, the grooves extending longitudinally through the first baffle.

3. The water deflector of claim 2, wherein the deflector further comprises a second water deflector disposed on the first water deflector, the second water deflector cooperating with the first water deflector for blocking the air flow in the air duct.

4. The baffle of claim 3, wherein the second baffle includes a base and a rim extending from the base in the direction of the incoming wind.

5. The water barrier of claim 3 wherein said curvilinear shape comprises a wave or saw-tooth shape.

6. The water deflector of claim 5, wherein the second water deflector is disposed in a peak region of the first water deflector.

7. The water deflector of any one of claims 1 to 6, wherein the box body is in a rectangular parallelepiped shape, and a plurality of the first water deflector are disposed in the cavity in parallel and uniformly.

8. A cooling system for a nuclear power plant, comprising a cooler, characterized by further comprising a water collector and a water deflector as claimed in any one of claims 1 to 7;

the cooler is used for refrigerating high-temperature and high-humidity air;

9. The cooling system for nuclear power plant as claimed in claim 8, wherein said water collecting device further includes a drain pipe, said water collecting tray is provided with a drain hole, and said drain pipe is communicated with said drain hole.

10. The cooling system for nuclear power plant as claimed in claim 9, wherein said water stop includes two upper and lower rows, and said water collection pans include two, one of which is provided to be fitted to the water stop of the upper row, the other of which is fitted to the water stop of the lower row, and the two water collection pans are connected through said drain pipe.