A kind of power plant warm wastewater discharge device and discharge method

Abstract

The present invention relates to the field of warm wastewater discharge from power plants, and in particular to a device and method for discharging warm wastewater from power plants, the device comprising a drain pipe and a top pipe, the drain pipe being arranged horizontally, the top pipe being arranged at the upper end of the drain pipe, the top pipe being connected to the ocean, and the warm wastewater flowing into the ocean through the drain pipe and the top pipe; the top pipe being a double-layer cylindrical structure, a plurality of blades being arranged between the inner wall of the top pipe and the outer wall of the top pipe, corresponding guide holes being arranged on the inner wall of the top pipe and the top pipe between the two blades, respectively, and the warm wastewater entering the ocean through the guide holes. The present invention enhances the heat dissipation capacity of the warm wastewater by arranging arc-shaped blades and baffles, thereby achieving control over the influence range of the warm wastewater. Compared with the prior art, the drainage system of the present invention can effectively reduce the heat-affected area of ​​the marine environment around the power plant and protect the health of the marine ecosystem.

Description

Technical Field

[0001] The present invention relates to the field of warm wastewater discharge from power plants, and in particular to a warm wastewater discharge device and a discharge method for power plants. Background Art

[0002] The construction of power plant projects involves the problem of discharging warm water into the ocean. In the existing technology, the square top pipe of the warm water drainage pipe adopts a four-hole outlet design, and the warm water of the power plant is discharged through the four holes of the top pipe. The drainage capacity of the power plant drainage pipe reaches 140m 3 / s, the discharged warm water is affected by the tide and spreads rapidly to the surrounding sea area, causing a large area of ​​thermal impact on the surrounding marine environment, which is not conducive to the protection of the marine environment. In the prior art, there is a lack of a power plant warm wastewater discharge device to increase the heat dissipation of warm wastewater and reduce the impact area on the marine environment around the power plant. Summary of the invention

[0003] The present invention provides a power plant warm wastewater discharge device and a discharge method, which are used to solve the problem in the prior art that the warm wastewater causes a large area of ​​thermal impact on the marine environment.

[0004] The technical solution of the present invention is as follows:

[0005] The present invention proposes a warm wastewater discharge device for a power plant, which comprises a drain pipe, a top pipe, blades and guide holes. The drain pipe is horizontally arranged, the top pipe is arranged at the upper end of the drain pipe, the top pipe is connected to the ocean, and the warm wastewater flows into the ocean through the drain pipe and the top pipe; the top pipe is a double-layer cylindrical structure, a plurality of blades are arranged between the inner wall and the outer wall of the top pipe, corresponding guide holes are respectively arranged on the inner wall and the outer wall of the top pipe between two blades, and the warm wastewater enters the ocean through the guide holes.

[0006] In some embodiments, the blades are arc-shaped blades, and the arc-shaped blades cause the warm water flow to form a rotating flow area.

[0007] In some embodiments, the inner wall and the outer wall of the top pipe are coaxial double-layer structures, and the top pipe allows the warm wastewater to flow evenly from all directions to the ocean.

[0008] In some embodiments, the device also includes a plurality of baffles distributed around the top pipe, which block the diffusion of warm wastewater discharged through the top pipe and block the tide of seawater from flowing toward the top pipe; the tide of seawater flows in and out through the gaps of the baffles.

[0009] In some embodiments, the baffles are evenly distributed in a ring shape around the top pipe, and the warm drainage impacts the baffles and flows in a ring shape in the direction of the baffles, increasing the rotational force of the warm drainage; the seawater tide flows in from the baffle gaps and flows in a ring shape in the direction of the baffles along with the warm drainage, increasing the rotational force of the warm drainage and increasing the residence time of the warm drainage in the baffle area.

[0010] In some embodiments, the baffle is an arc-shaped structure, distributed in a circle around the top pipe with the top pipe as the center; the warm drainage water impacts the baffle and flows along the arc direction of the baffle, increasing the rotational force of the warm drainage water flow; the seawater tide flows into the gap between the baffles, moves along the arc direction of the baffle, increasing the rotational force of the water flow.

[0011] In some embodiments, a top cover is provided at the top of the top pipe to prevent seawater tide from entering the top pipe.

[0012] The present invention proposes a method for discharging warm wastewater from a nuclear power plant, the method comprising:

[0013] The warm drainage flows into the top pipe through the drainage pipe, and flows through the guide holes on the inner wall of the top pipe, the arc-shaped blades and the guide holes on the outer wall of the top pipe in sequence;

[0014] The warm drainage forms a vortex through the arc-shaped blades, flows into the seawater from the top pipe and rotates and diffuses in the seawater;

[0015] When the warm drainage diffuses to the baffle, it impacts the baffle and rotates along the direction of the arc-shaped baffle;

[0016] The seawater tide flows into the baffle area from the baffle gap, and flows along the inner side of the baffle, driving the warm drainage to rotate.

[0017] The implementation of the present invention has the following beneficial effects:

[0018] The present invention proposes a power plant warm wastewater discharge device and discharge method. The present invention enhances the heat dissipation capacity of the warm wastewater by setting arc-shaped blades and baffles, and realizes the control of the influence range of the warm wastewater. Compared with the prior art, the drainage system of the present invention can effectively reduce the heat impact area of ​​the marine environment around the power plant and protect the health of the marine ecosystem. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a warm wastewater discharge device for a power plant proposed in an embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of a top pipe of a power plant warm wastewater discharge device proposed in an embodiment of the present invention;

[0021] Figure 3 A cross-sectional side view of a power plant warm wastewater discharge device proposed in an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of a top pipe of a warm wastewater discharge device for a power plant proposed in an embodiment of the present invention;

[0023] Description of the drawings: 1. Top pipe; 2. Diversion hole; 3. Top cover plate; 4. Drain pipe; 5. Blades; 6. Baffle. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figures 1 to 4 As shown, the present invention proposes a power plant warm wastewater discharge device, which includes a drain pipe 4, a top pipe 1, blades 5 and a guide hole 2. The drain pipe 4 is horizontally arranged, and the top pipe 1 is arranged at the upper end of the drain pipe 4. The top pipe 1 is connected to the ocean, and the warm wastewater flows into the ocean through the drain pipe 4 and the top pipe 1. The top pipe 1 is a coaxial double-layer cylindrical structure, and the top pipe 1 allows the warm wastewater to flow evenly to the ocean from all directions.

[0026] A plurality of blades 5 are arranged between the inner wall of the top pipe 1 and the outer wall of the top pipe 1, and corresponding guide holes 2 are arranged on the inner wall of the top pipe 1 and the outer wall of the top pipe 1 between two blades 5, respectively, and the warm drainage enters the ocean through the guide holes 2. The blades 5 are arc-shaped blades 5, and due to the special shape of the arc-shaped blades 5, the warm drainage water flow will form a rotating flow area, that is, a vortex. The vortex disperses the water flow to form a rotating force, increases the heat dissipation efficiency of the water flow, and reduces the temperature of the warm drainage.

[0027] The device is provided with arc baffles 6 arranged in uniform annular distribution around the top pipe 1. The warm drainage with rotational force guided out of the top pipe 1 spreads in the ocean and encounters the baffles 6 arranged in annular distribution around the top pipe 1 to form a rebound force, thereby controlling the relative range of the diffusion of the warm drainage. After the warm drainage water flows into the baffles 6, it flows along the inner side of the curved baffles 6. The baffles 6 distributed in the circumference allow most of the water flow to rotate and dissipate heat in a relatively small range. Through the rotational flow of the warm drainage, the heat dissipation capacity of the warm drainage is increased, and the impact of the warm drainage on the ocean is reduced.

[0028] At the same time, when the device is impacted by tidal currents at different times and in different directions, most of the tidal currents are blocked by the baffles 6, reducing the impact on the rotation of the water body near the drain pipe 4. A small part of the tidal current penetrates into the gaps between the circularly arranged baffles 6, and the tidal current flows along the inner arc direction of the arc baffles 6, further driving the rotation of the warm drainage water, increasing the retention and heat dissipation time of the tidal current water body in the area inside the baffles 6, and increasing the surface diffusion of the heat of the warm drainage water body, effectively reducing the heat affected area near the power plant outlet.

[0029] The present invention proposes a method for discharging warm wastewater from a nuclear power plant, the method comprising:

[0030] The warm drainage flows into the top pipe 1 through the drainage pipe 4, and flows through the guide hole 2 on the inner wall of the top pipe 1, the arc blades 5 and the guide hole 2 on the outer wall of the top pipe 1 in sequence. The warm drainage forms a vortex through the arc blades 5, flows into the seawater from the top pipe 1 and rotates and diffuses in the seawater. When the warm drainage diffuses to the baffle 6, the warm drainage impacts the baffle 6 and rotates and flows in the direction of the arc baffle 6. Thereby controlling the relative range of warm water diffusion, and the water flow rotation force is strengthened due to the annular distribution.

[0031] When the device is impacted by tidal currents at different times and in different directions, most of the tidal currents are blocked by the baffle 6, reducing the impact on the rotation of water flow near the drain pipe 4. A small part of the seawater tidal current flows into the baffle 6 area from the gap of the baffle 6, and the seawater tidal current flows along the inner side of the baffle 6, driving the warm drainage to rotate, thereby enhancing the rotation flow rate of the warm drainage, increasing the retention time of the warm drainage in the baffle 6 area, and increasing the heat diffusion of the regional water surface.

[0032] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A warm wastewater discharge device for a power plant, characterized in that: The device comprises a drainage pipe (4), a top pipe (1), blades (5) and a guide hole (2); the drainage pipe (4) is arranged horizontally, the top pipe (1) is arranged at the upper end of the drainage pipe (4), the top pipe (1) is connected to the ocean, and warm drainage flows into the ocean through the drainage pipe (4) and the top pipe (1); the top pipe (1) is a double-layer cylindrical structure, a plurality of dry blades (5) are arranged between the inner wall of the top pipe (1) and the outer wall of the top pipe (1), and corresponding guide holes (2) are respectively arranged on the inner wall of the top pipe (1) and the outer wall of the top pipe (1) between the two blades (5), and the warm drainage enters the ocean through the guide holes (2).

2. A power plant warm wastewater discharge device according to claim 1, characterized in that: The blades (5) are arc-shaped blades (5), and the arc-shaped blades (5) enable the warm water discharge flow to form a rotating flow area.

3. The warm wastewater discharge device of a power plant according to claim 1, characterized in that: The inner wall of the top pipe (1) and the outer wall of the top pipe (1) are coaxial double-layer structures, and the top pipe (1) allows the warm wastewater to flow evenly from all directions to the ocean.

4. The warm wastewater discharge device of a power plant according to claim 1, characterized in that: The device further comprises a plurality of baffles (6), wherein the baffles (6) are distributed around the top pipe (1), and the baffles (6) prevent the warm wastewater discharged through the top pipe (1) from diffusing and prevent the tide of seawater from flowing toward the top pipe (1). The tide of seawater flows in and out through the gaps between the baffles (6).

5. A power plant warm wastewater discharge device according to claim 4, characterized in that: The baffles (6) are evenly distributed in a circular manner around the top pipe (1), and the warm drainage impacts the baffles (6) and flows in a circular manner along the direction of the baffles (6), thereby increasing the rotational force of the warm drainage; the seawater tidal current flows in from the gaps in the baffles (6) and flows in a circular manner along the direction of the baffles (6) along with the warm drainage, thereby increasing the rotational force of the warm drainage and increasing the retention time of the warm drainage in the baffle (6) area.

6. A power plant warm wastewater discharge device according to claim 5, characterized in that: The baffle (6) is an arc-shaped structure and is distributed in a ring around the top pipe (1) with the top pipe (1) as the center; the warm drainage water impacts the baffle (6) and flows along the arc direction of the baffle (6), thereby increasing the rotational force of the warm drainage water flow; the seawater tidal current flows into the gaps between the baffles (6) and moves along the arc direction of the baffles (6), thereby increasing the rotational force of the water flow.

7. The warm wastewater discharge device of a power plant according to claim 1, characterized in that: A top cover plate (3) is provided at the top of the top pipe (1), and the top cover plate (3) prevents seawater tide from pouring into the top pipe (1).

8. A method for discharging warm wastewater from a nuclear power plant according to any one of claims 1 to 7, characterized in that: The method comprises: The warm drainage flows into the top pipe (1) through the drainage pipe (4), and sequentially flows through the guide holes (2) on the inner wall of the top pipe (1), the arc-shaped blades (5), and the guide holes (2) on the outer wall of the top pipe (1); The warm wastewater forms a vortex through the arc-shaped blades (5), flows into the seawater from the top pipe (1) and rotates and diffuses in the seawater; When the warm wastewater diffuses to the baffle (6), the warm wastewater impacts the baffle (6) and flows in a rotational manner along the arc-shaped baffle (6); The seawater tidal current flows into the baffle (6) area from the gap of the baffle (6), and the seawater tidal current flows along the inner side of the baffle (6), driving the warm drainage water to rotate and flow.

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