CN101469540B - Trash control system for water intake channel of nuclear power plant - Google Patents

Abstract

The invention relates to a garbage barrier system for nuclear power plant intake channel, comprising wire cables, a garbage barrier net, and a mechanical hoisting device, wherein wire cables hang over the sea, with two ends fixed with racks on the ground fixing pier platform, and connected with the mechanical hoising device; the garbage barrier net hangs over wire cables, with lower end fixed with the anchor chain used and concrete anchor for seabed. The invention has advantage and beneficial effect that: 1. the garbage barrier effect is great; 2. operation is fast and convenient, and operation fee is saved; 3. the entire net can be put into water to ensure smoothly passing of the dredger, and the hoisting operation is force and time saving; 4. the entire garbage barrier system is capableof bearing relatively big storm impact, so as to ensure safety and reliability of working and safety of the breakwater; 5. the construction cost is low, and maintenance work is small.

Description

Trash control system for water intake channel of nuclear power plant

Technical field:

The invention relates to a device for intercepting impurities in seawater, in particular to an anti-pollution system for a water intake channel of a nuclear power plant.

Background technique:

With the increasingly tense international energy supply situation, in order to meet the rapid growth of power demand and better protect the environment, nuclear power, as a clean energy source, has achieved rapid development. As we all know, the operation of nuclear power plants is inseparable from the water source. The water consumption of nuclear power plants is huge, and the water source system is extremely important for the normal operation of nuclear power plants. However, due to the increasingly serious pollution of the marine environment in my country's coastal areas, in some seasons, wheat straw, marine plants such as: seaweed, algae, etc., and floating sewage such as tourist and domestic waste flood into the water intake channel of the nuclear power plant, which seriously affects the operation of the nuclear power plant and causes the normal water intake. , poses a serious threat to the safe operation of nuclear power plants. At present, some nuclear power plants use buoyant tanks to stop the pollution, but the effect of the pollution is poor, and the ability to resist wind and waves and the stability of work are not high.

Invention content:

The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art, and to provide a sewage interception system for the water intake channel of a nuclear power plant, which can effectively intercept the sewage in seawater, and does not affect the entry and exit of ships by using a mechanical lifting mechanism .

The technical solution of the present invention is: a trash control system for the water intake channel of a nuclear power plant, which is characterized in that it is composed of a steel wire rope, a trash net and a mechanical lifting device. , and the steel wire rope is connected with the mechanical lifting device; the trash block is suspended on the steel wire rope, and its lower part is fixed with the seabed with anchor chains and concrete anchors.

The present invention can also adopt following technical measures:

The above-mentioned trash control net consists of two sections of trash nets arranged in a "herringbone" shape on the outside of the entrance of the water intake channel of the nuclear power plant, and the angle between the two sections of the net is 90°.

The above-mentioned trash net is composed of a first-level grid and a second-level mesh, and the second-level mesh is hung on the first-level grid.

A movable support frame is installed in the middle part of the above-mentioned trash block.

The above-mentioned mechanical lifting device adopts a manual winch.

The present invention has following advantage and positive effect:

1. The trash blocking system relies on steel wire ropes and ground chain hanging nets to carry out trash blocking. The steel wire ropes and hanging nets are suspended above the water surface. In the case of strong wind and waves and a large amount of dirt pouring in, it can also effectively block the dirt from the water surface. Crossing with the waves, the pollution blocking effect is good.

2. Since the trash block consists of two segments arranged in a "herringbone" shape on the outside of the entrance of the water intake channel of the nuclear power plant, the angle between the two segments is 90°. Therefore, the backwash effect of the reciprocating ocean current can be fully utilized to reduce the attachment of dirt on the trash net and the accumulation of dirt at the mouth of the drain.

3. Since the trash stop net is composed of a first-level grid and several second-level mesh pieces, the second-level mesh pieces are hung on the first-level grid. When the net is decontaminated or damaged, there is no need to replace the whole net. It is only necessary to clean and replace part of the secondary mesh. The operation is quick and convenient, and the operating cost is saved.

4. The wire rope is connected with a mechanical lifting mechanism. When the water intake channel needs to be dredged, the whole net can be lowered in the water to ensure the smooth passage of the dredger. And the lifting operation is labor-saving and time-saving.

5. Movable support is used in the middle of each trash block, and its advantages are: the deflection of the overhead steel wire rope of the trash block is small, the height of the support is reduced, the tension of the wire rope is small, and a winch with a small load can be used, and the ability to resist wind and waves is improved; the trash block is lowered at When in water, the water surface can provide a channel width of about 40 meters, which better guarantees the passage of ships.

6. Since both ends of the steel wire rope are hinged and fixed to the upper bracket of the fixed pile foundation platform, and the bottom of the trash net is anchored with chains and seabed concrete anchors, the stability of the steel wire rope and the trash net is enhanced, so that the entire trash control system can withstand high loads. The impact of large wind and waves ensures the safety and reliability of its work and the safety of the breakwater.

7. Low construction cost and small maintenance workload.

Description of drawings:

Fig. 1 is a front view of the present invention.

Figure 2 is a top view of the present invention.

Fig. 3 is a structural schematic diagram of the trash net.

Fig. 4 is a schematic diagram of a first-level grid.

Fig. 5 is a schematic diagram of a secondary mesh.

Detailed ways:

A trash-stopping system for an intake channel of a nuclear power plant is composed of a manual winch 1, a wire rope 3 and a trash-blocking net. In order to make full use of the recoil effect of the reciprocating ocean current, reduce the attachment of dirt to the trash net, and avoid the accumulation of dirt at the mouth of the drain, the trash net of this system is arranged in the shape of a "herringbone" in the nuclear power plant by the left and right sections. On the outer side of the entrance of the open water intake channel, the angle between the two sections of the trash block is 90°. In order to make the replacement of the trash net convenient and fast, and save costs, the trash net of this system is composed of a first-level mesh 4 and a second-level mesh 5, and the second-level mesh is hung on the first-level mesh, so the cleaning of the net It is not necessary to replace the whole net when it is dirty or damaged, only some secondary meshes need to be cleaned and replaced. In order to improve the wind and wave resistance of the whole system and ensure the passage of ships, a movable support frame 7 is installed in the middle of the trash net. In order to strengthen the stability of the wire rope and the trash net, so that the entire trash block system can withstand the impact of large wind and waves, to ensure its safe and reliable operation, and to ensure the safety of the breakwater, the wire rope is suspended above the sea, and its two ends are connected to the land to fix the pile foundation platform. The upper brackets 2, 6, 7 are hinged and fixed, and the steel wire rope is connected with the manual winches 1, 8; and the trash net is suspended on the steel wire rope, and its lower part is anchored with the anchor chain 9 and the concrete anchor on the seabed.

Claims (5)

1. A trash-stopping system for a nuclear power plant intake channel, characterized in that: it is made up of a steel wire rope, a trash-stop net and a mechanical lifting device; The lifting device is connected; the trash net is suspended on the wire rope, and its lower part is fixed to the seabed with anchor chains and concrete anchors. 2. The trash blocking system of the water intake channel of the nuclear power plant according to claim 1, characterized in that: the above-mentioned trash block net is arranged in the shape of a "herringbone" on the outside of the entrance of the water intake channel of the nuclear power plant, and the two sections of the net are sandwiched between each other Angle 90°. 3. The trash-stopping system for the water intake channel of a nuclear power plant according to claim 1, wherein the trash-stop net is composed of a primary mesh and a secondary mesh, and the secondary mesh is hung on the primary mesh. 4. The trash-stopping system for the water intake channel of the nuclear power plant according to claim 1, characterized in that: the middle part of the trash-blocking net is equipped with a movable support frame. 5. The trash arresting system for the water intake channel of the nuclear power plant according to claim 1, characterized in that: the above-mentioned mechanical lifting device adopts a manual winch.

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