Forced foaming device for treating circulating cooling water of nuclear power station

Abstract

The utility model discloses a forced foaming device for nuclear power station circulating cooling water treatment, which comprises a fan and a support framework structure, the output end of the fan is fixedly connected with an air supply main pipe, the other end of the air supply main pipe is connected with a shunting annular branch pipe, the shunting annular branch pipe is fixedly arranged on the upper surface of the support framework structure, and the air supply main pipe is connected with a foaming pipe. The two corners of the diversion annular branch pipe are fixedly connected with rear foaming structures, and the other two corners of the diversion annular branch pipe are fixedly connected with front foaming structures. According to the forced foaming device for treating the circulating cooling water of the nuclear power station, the forced foaming device can generate a large amount of fine bubbles, so that most pollutants are enriched in a small amount of foam water, the pollutants in the circulating cooling water can be efficiently enriched and treated, the treatment cost is effectively reduced, and the energy consumption is reduced. And the treatment of the circulating cooling water of the nuclear power station becomes possible.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power plant circulating cooling water treatment devices, and particularly relates to a forced foaming device for nuclear power plant circulating cooling water treatment. Background Art

[0002] A large amount of seawater is required for the cooling circulating water of a nuclear power plant, and the water temperature difference between the inlet and outlet is about 8 - 10 °C. Due to the large amount of cooling circulating water, a large number of marine organisms and various algae will enter the cooling system. Under the action of mechanical collision, heat, and chemical action (disinfectant), the marine organisms and various algae in the cooling circulation will die and decompose, making the circulating cooling water contain more organic matter. The circulating cooling water is usually taken from the ocean intercepted by the grid through a booster pump at the water intake, then lifted to the condenser for heat exchange, discharged into the overflow weir, then drained into the siphon well, and finally discharged into the ocean through the drainage pipeline for natural diffusion and cooling. For safety reasons, there is a certain height difference between the overflow weir and the sea level. Therefore, when the warm water after heat exchange drains from the overflow weir into the siphon well, it is inevitable to generate hydraulic jump forced aeration, forming a water flow entrainment phenomenon within a certain range. When the water flow reaches the release sea area, the bubbles will overflow the water surface and form a foam with strong stability, thus forming a relatively long foam belt at the circulating cooling water discharge port. It can be seen that the foam in the cooling circulating water partially enriches a large amount of organic matter and nutrient salt components, forming a relatively large area of foam area with strong persistence in the sea area around the nuclear power plant. This not only causes certain pollution to the surrounding sea area but also leads to the common misunderstanding among the people that the nuclear power plant discharges a large amount of toxic and harmful pollutants into the surrounding sea area, that is, the so-called sensory pollution, which greatly affects the acceptance and recognition of the nuclear power plant by the public, especially the people in the area where the nuclear power plant is located. Therefore, it is very necessary to effectively remove the pollution of the circulating cooling seawater. Existing technologies such as "Research on Foam Formation Analysis and Pollution Control Engineering Measures" (Guangdong Hydropower & Water Resources, Vol.5, pp26 - 30, October 2002) mainly optimize the overflow weir of the siphon well, and set partitions in the siphon well and take defoaming measures to reduce the generation quantity of foam. There are also nuclear power plants that adopt the measure of adding defoaming agents, adding defoaming agents into the siphon well and mixing them with the discharged circulating cooling water to reduce the quantity and area of the foam belt formed on the sea surface. However, the above measures do not fundamentally solve the problem of organic matter pollution caused by the fragmentation of fish, plankton, and algae due to the temperature rise and violent movement of the circulating cooling water. For this reason, we propose a forced foaming device for nuclear power plant circulating cooling water treatment. Content of the Utility Model

[0003] The main purpose of the utility model is to provide a forced foaming device for nuclear power plant circulating cooling water treatment, which can effectively solve the problems in the background art.

[0004] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0005] A forced foaming device for nuclear power plant circulating cooling water treatment, comprising a fan and a support frame structure. The output end of the fan is fixedly connected with a main air supply pipe, and the other end of the main air supply pipe is connected with a shunt annular branch pipe. The shunt annular branch pipe is fixedly installed on the upper surface of the support frame structure. Rear foaming structures are fixedly connected to two corner positions of the shunt annular branch pipe, and front foaming structures are fixedly connected to the other two corner positions of the shunt annular branch pipe. Weight lead rings are sleeved on the surfaces of the rear foaming structures and the front foaming structures.

[0006] Further, the support frame structure includes a first oval floating cylinder, a second oval floating cylinder, a cage and insertion holes. A cage is fixedly installed between the first oval floating cylinder and the second oval floating cylinder, and insertion holes are opened at positions near both ends on the surfaces of the first oval floating cylinder and the second oval floating cylinder.

[0007] Further, the rear foaming structure includes a rear air supply hose and a rear perforated pipe. Rear air supply hoses are connected to positions near both ends on the surface of the rear perforated pipe.

[0008] Further, the front foaming structure includes a front air supply hose and a front perforated pipe. Front air supply hoses are fixedly connected to positions near both ends on the surface of the front perforated pipe.

[0009] Further, a total of four weight lead rings are provided, and are respectively sleeved on the surfaces of two front air supply hoses and two rear air supply hoses.

[0010] Further, the two rear air supply hoses and the two front air supply hoses respectively pass through the insertion holes at corresponding positions and are communicated with the shunt annular branch pipe.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] In the utility model, the forced foaming device can generate a large number of fine bubbles, so that various marine organisms and organic matter of algal fragments containing pollutants adhere to the surface of the microbubbles and rise to the sea surface, forming a relatively thick foam layer, so that most of the pollutants are enriched in a small amount of foam water, thereby efficiently enriching and treating the pollutants in the circulating cooling water, effectively reducing the treatment cost, and making it possible to treat the circulating cooling water of the nuclear power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a plane installation display diagram of the overall structure of a forced foaming device for nuclear power plant circulating cooling water treatment according to the utility model;

[0014] Figure 2Top view of the overall structure of a forced foaming device for nuclear power plant circulating cooling water treatment according to the present utility model;

[0015] Figure 3 Partial display diagram of a forced foaming device for nuclear power plant circulating cooling water treatment according to the present utility model.

[0016] In the figure: 1, fan; 2, main air supply pipe; 3, support frame structure; 301, first oval float; 302, second oval float; 303, cage; 304, insertion hole; 4, shunt annular branch pipe; 5, rear foaming structure; 501, rear air supply hose; 502, rear perforated pipe; 6, front foaming structure; 601, front air supply hose; 602, front perforated pipe; 7, weight lead ring. Specific embodiments

[0017] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] As Figures 1-3 shown, a forced foaming device for nuclear power plant circulating cooling water treatment includes a fan 1 and a support frame structure 3. The output end of the fan 1 is fixedly connected to a main air supply pipe 2. The other end of the main air supply pipe 2 is connected to a shunt annular branch pipe 4. The shunt annular branch pipe 4 is fixedly installed on the upper surface of the support frame structure 3. The rear foaming structure 5 is fixedly connected to two corner positions of the shunt annular branch pipe 4. The front foaming structure 6 is fixedly connected to the other two corner positions of the shunt annular branch pipe 4. The weight lead rings 7 are sleeved on the surfaces of the rear foaming structure 5 and the front foaming structure 6;

[0019] The support frame structure 3 includes a first oval float 301, a second oval float 302, a cage 303, and insertion holes 304. A cage 303 is fixedly installed between the first oval float 301 and the second oval float 302. Insertion holes 304 are provided at positions near both ends on the surfaces of the first oval float 301 and the second oval float 302. The rear foaming structure 5 includes a rear air supply hose 501 and a rear perforated pipe 502. Rear air supply hoses 501 are connected to positions near both ends on the surface of the rear perforated pipe 502. The front foaming structure 6 includes a front air supply hose 601 and a front perforated pipe 602. Front air supply hoses 601 are fixedly connected to positions near both ends on the surface of the front perforated pipe 602. There are a total of four counterweight lead rings 7, which are respectively sleeved on the surfaces of the two front air supply hoses 601 and the two rear air supply hoses 501. The function of the counterweight lead rings 7 is to sink the front perforated pipe 602 and the rear perforated pipe 502 to the seabed, so as to better enable the tiny bubbles to contact the organic matter of various marine organisms and algal fragments containing pollutants. The two rear air supply hoses 501 and the two front air supply hoses 601 respectively pass through the insertion holes 304 at corresponding positions and are connected to the shunt annular branch pipe 4.

[0020] It should be noted that the present utility model is a forced foaming device for nuclear power plant circulating cooling water treatment. When in use, the fan 1 is started to introduce air into the shunt annular branch pipe 4 through the air supply main pipe 2. Then the shunt annular branch pipe 4 further introduces the air into the two front air supply hoses 601 and the two rear air supply hoses 501 respectively. Then the air enters the front perforated pipe 602 and the rear perforated pipe 502, and forms a large number of tiny bubbles in the seawater through the micropores on their surfaces. In this way, the organic matter of various marine organisms and algal fragments containing pollutants adheres to the surfaces of the tiny bubbles and rises to the sea surface, forming a relatively thick foam layer. By collecting the foam, most of the pollutants are concentrated in a small amount of foam water, and then enter the biochemical system for further treatment and purification.

[0021] The above shows and describes the basic principles, main features, and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A forced foaming device for the treatment of circulating cooling water in a nuclear power plant, characterized in that: It includes a fan (1) and a support frame structure (3). The output end of the fan (1) is fixedly connected to a main air supply pipe (2). The other end of the main air supply pipe (2) is connected to a shunt annular branch pipe (4). The shunt annular branch pipe (4) is fixedly installed on the upper surface of the support frame structure (3). Rear foaming structures (5) are fixedly connected to two corner positions of the shunt annular branch pipe (4), and front foaming structures (6) are fixedly connected to the other two corner positions of the shunt annular branch pipe (4). Weight lead rings (7) are sleeved on the surfaces of the rear foaming structures (5) and the front foaming structures (6).

2. The forced foaming device for nuclear power plant circulating cooling water treatment according to claim 1, wherein: The support frame structure (3) includes a first oval float (301), a second oval float (302), a cage (303), and insertion holes (304). A cage (303) is fixedly installed between the first oval float (301) and the second oval float (302). Insertion holes (304) are provided near both ends of the surfaces of the first oval float (301) and the second oval float (302).

3. The forced foaming device for nuclear power plant circulating cooling water treatment according to claim 2, characterized in that: The rear foaming structure (5) includes a rear air supply hose (501) and a rear perforated pipe (502). Rear air supply hoses (501) are connected to near both ends of the surface of the rear perforated pipe (502).

4. The forced foaming device for nuclear power plant circulating cooling water treatment according to claim 3, characterized in that: The front foaming structure (6) includes a front air supply hose (601) and a front perforated pipe (602). Front air supply hoses (601) are fixedly connected to near both ends of the surface of the front perforated pipe (602).

5. The forced foaming device for nuclear power plant circulating cooling water treatment according to claim 4, wherein: There are a total of four weight lead rings (7), which are respectively sleeved on the surfaces of two front air supply hoses (601) and two rear air supply hoses (501).

6. The forced foaming device for nuclear power plant circulating cooling water treatment according to claim 5, wherein: The two rear air supply hoses (501) and the two front air supply hoses (601) respectively pass through the insertion holes (304) at corresponding positions to communicate with the shunt annular branch pipe (4).

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