CN216238394U - Sewage blocking construction device for water intake open channel of nuclear power station - Google Patents

Abstract

The utility model discloses a sewage blocking construction device for a water intake open channel of a nuclear power station, which is characterized by comprising guide dams at two sides of a water inlet, wherein a sewage blocking structure is arranged in the middle of each guide dam and mainly comprises a plurality of parallel water intake culverts, a intertidal sewage blocking net is arranged above each water intake culvert, a plurality of special sewage blocking net cages are arranged in each water intake culvert, and a movable portal crane is arranged above each sewage blocking structure. The utility model can effectively solve the problems in the conventional trash holding scheme, increases the holding strength, greatly reduces underwater operation and manpower use, improves the fishing and cleaning efficiency, and saves the engineering investment and the operation and maintenance cost.

Description

Sewage blocking construction device for water intake open channel of nuclear power station

Technical Field

The utility model relates to a sewage blocking construction device for a nuclear power station water intake open channel, and belongs to the technical field of nuclear power station cold source guarantee.

Background

The nuclear power station can generate a large amount of heat during operation, and a reliable cold source is required for cooling so as to ensure the safe and stable operation of the power station. The existing nuclear power stations are coastal power stations, seawater is used as a cold source, and more than 60% of heat generated in the operation of a unit is led out through the flow of suction → heat exchange → discharge. Most nuclear power stations adopt open channels to fetch water, and in order to ensure reliable water fetching, a plurality of filter devices are arranged in water fetching open channel doors or channels of most nuclear power stations, and the filter devices comprise trash screens, oil-blocking floats, coarse grids, trash screen bags, coarse and fine grids, drum nets and other devices. Although these measures are taken, in recent years, the water level pressure difference between the upstream side and the downstream side of the open channel and the drum network caused by invasion of marine organisms or sundries in the nuclear power plant is too large, so that power reduction, shutdown and shutdown time sometimes occur, and the safety production of the nuclear power plant is seriously threatened.

The conventional trash rack has the following problems:

1. the plane net has large span, is stressed greatly and is easy to damage, and is not easy to clean sundries, and needs diving operation;

2. the trash blocking net bag mainly collects suspended matters, and the effect of collecting floating matters is not ideal;

3. the trash rack is relatively weak in strength and is easily affected by typhoon, so that the structure is damaged;

4. can not be close to the setting of water intaking pump house, the marine life effect that the waters was bred in the protection open channel is relatively poor.

Disclosure of Invention

The technical problem solved by the utility model is as follows: how to design a pollution-reducing marine ecology protection salvage cleaning efficiency, save engineering investment and operation and maintenance cost trash holding method.

In order to solve the technical problem, the utility model provides a sewage blocking construction device for a water intake open channel of a nuclear power station, which is characterized by comprising diversion dikes on two sides of a water inlet, wherein a sewage blocking construction is arranged in the middle of the diversion dikes and mainly comprises a plurality of parallel water intake culverts, a tidal sewage blocking net is arranged above the water intake culverts, a plurality of special sewage blocking net cages are arranged in the water intake culverts, and a movable portal crane is arranged above the sewage blocking construction.

Preferably, the left side of water intaking open channel and diversion dike junction be equipped with a marine organism mouth of living, the right side of water intaking open channel is connected with the diversion dike through passing the ship section, be equipped with the gantry crane track that the gantry crane of being convenient for removed on the front and back both sides of water intaking open channel.

Preferably, the special trash blocking net cage is movably connected with the water taking culvert.

Preferably, the special trash blocking net cage comprises a frame, detachable net pieces are arranged on two sides of the frame, a plurality of hanging rings are arranged on the frame, and the frame is formed by welding a plurality of stainless steel frames.

The utility model has the characteristics that:

1. shunting: the open channel is divided into a plurality of flow channels by constructing a porous water taking culvert (the net size of a single hole is about 7 meters multiplied by 5 meters) in the open channel so as to reduce the possibility that marine organisms burst to block the whole flow channel, thereby realizing the aim of respective control, meanwhile, three rows of trash blocking net cage inlets are arranged at the upper part of the detention platform, and the opening is provided with a detachable trash blocking net piece. When the tide level is higher than the detention platform, the inlet of the trash blocking net box can also become a water inlet of the box culvert, so that the possibility that the trash blocking net at the inlet of the box culvert is blocked is further reduced.

2. Blocking and fishing: the water taking culvert, the trash blocking net cage and the portal crane are matched for use, so that the interception strength and the fishing efficiency can be greatly improved; the upstream side of the open channel can be salvaged by a ship, and after entering a water taking culvert, the water can be collected and salvaged by a trash blocking net cage; the trash blocking net cage can be arranged into various forms: when the trash blocking net cages with different apertures, trash blocking net cages with hooks, entity gates and the like are used, the difference between the water levels upstream and downstream of the trash blocking net cages needs to be observed, and the damage to the net cages caused by overlarge water level differences is avoided;

3. stagnation and accumulation: the interception of the plurality of trash blocking net cages and the temporary storage of the water taking culvert can delay the invasion speed of marine organisms and reduce the risk of disaster caused by centralized outbreak of the marine organisms. Meanwhile, other water intake culverts can still supply water continuously;

4. cleaning: the elevation of a box culvert top plate (detention platform) is set as an average tide level, the tidal action can be fully utilized through the cooperation of the intertidal zone trash rack and the detention platform, disaster-causing marine organisms or sundries can be detained on the platform, and the detention platform is exposed out of the water surface when the tide is subsided, so that the personnel can conveniently clean the platform;

5. releasing: collected marine organisms are salvaged and can be released to the sea area outside the open channel breakwater through the release opening, so that the marine ecology is protected, and the outward transportation workload is greatly reduced;

6. emergency: the ship passing section adopts a rubber dam or a liftable trash rack form, and the height of a dam body or the trash rack can be reduced during ship passing and emergency so as to realize the functions of ship passing and water discharging;

7. because the height of the water taking culvert is about 7 meters, the trash blocking net cage can be provided with an upper layer and a lower layer for reducing the lifting height, and each layer is about 3.5 meters high.

The utility model can effectively solve the problems in the conventional trash holding scheme, increases the holding strength, greatly reduces underwater operation and manpower use, improves the fishing and cleaning efficiency, saves engineering investment and operation and maintenance cost, and has the function of releasing marine organisms. The main effects are as follows:

1. the large interception cross section is divided into a plurality of independent areas, so that the height of the trash rack is reduced, the load of the trash rack is reduced, and the interception safety is improved;

2. due to the arrangement of the trash blocking net cage, the collection efficiency of marine organisms and sundries is improved;

3. the arrangement of the release opening responds to the requirement of environmental protection and reduces the workload of outward transportation;

4. the intertidal zone trash rack and the setting of detaining the platform, very big reduction underwater operation volume.

Drawings

FIG. 1 is a top view of the present invention;

FIG. 2 is an elevational view of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

fig. 4 is a schematic structural view of the special trash holding cage of the present invention.

Detailed Description

In order to make the utility model more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to fig. four, the device for constructing the open water channel trash blocking structure of the nuclear power plant is characterized by comprising guide dams at two sides of a water inlet, a trash blocking structure 1 is arranged in the middle of each guide dam and mainly comprises a plurality of water taking culverts 2 which are arranged side by side, a intertidal trash blocking net 4 is arranged above each trash blocking structure 1, a plurality of special trash blocking net boxes 3 are arranged in the water taking culverts 2, a movable portal crane 5 is arranged above each trash blocking structure 1, a marine organism discharging port 6 is arranged at the joint of the left side of each trash blocking structure 1 and each guide dam, the right side of each trash blocking structure 1 is connected with the corresponding guide dam through a ship passing section 7, portal crane rails 8 convenient for the portal crane 5 to move are arranged on the front side and the rear side of each trash blocking structure 1, and the special trash blocking net boxes 3 are movably connected with the water taking culverts 2.

The special trash blocking net cage 3 comprises a frame 9, a detachable net piece 10 is arranged at the top of the frame 9, two hanging rings 11 are arranged on the frame 9, and the frame 9 is formed by welding a plurality of stainless steel frames 12. The special trash blocking net cage 3 is composed of a C-shaped box body frame formed by welding profile steels and detachable net sheets fixed among the profile steels. The box frame is formed by welding profile steel, and in order to prevent seawater corrosion, the profile steel should adopt stainless steel material, and its type selection, interval are confirmed according to structural design. The section steel is provided with small holes for fixing the detachable net sheets, and the hole diameters and the intervals of the small holes are suitable for tightly fixing the net sheets without generating overlarge gaps. The mesh sheet is a fine mesh which is not attached by marine organisms, and the mesh size is determined according to the marine organisms to be intercepted. The trash blocking net cage is fixed in the culvert through a gate slot arranged on the side wall of the water taking culvert, and the opening of the C-shaped box body faces to the upstream side so as to collect disaster organisms and sundries.

Claims (4)

1. The utility model provides a nuclear power station water intaking open channel structure of blocking dirt which characterized in that, includes the water conservancy diversion dyke of water inlet both sides, is equipped with one in the middle of the water conservancy diversion dyke and blocks dirt structure (1), mainly comprises a plurality of water intaking culvert (2) side by side, is equipped with tidal sewage blocking net (4) in the top of water intaking culvert (2) in be provided with a plurality of special trash blocking net casees (3), be equipped with a movable portal crane (5) in the top of blocking dirt structure (1).

2. The device for blocking the trash of the water intake open channel of the nuclear power plant as claimed in claim 1, wherein a marine organism discharging opening (6) is arranged at the joint of the left side of the trash blocking structure (1) and the diversion dike, the elevation of the top plate of the box culvert is arranged between the average tide level and the low tide level to form a retention platform, the right side of the trash blocking structure (1) is connected with the diversion dike through a ship passing section (7), and door machine rails (8) convenient for the movement of the door type crane (5) are arranged on the front side and the rear side of the trash blocking structure (1).

3. The device for blocking the sewage in the water intake open channel of the nuclear power plant as claimed in claim 1, wherein the special blocking net cage (3) is movably connected with the water intake culvert (2).

4. The device for blocking the dirt in the water intake open channel of the nuclear power plant as claimed in claim 1, wherein the special dirt blocking net cage (3) comprises a frame (9), detachable net sheets (10) are arranged on two sides of the frame (9), a plurality of lifting rings (11) are arranged on the frame (9), and the frame (9) is formed by welding a plurality of stainless steel frames (12).

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