CN217053592U - Nuclear power plant is with interim water intake device of sea water - Google Patents

Nuclear power plant is with interim water intake device of sea water Download PDF

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Publication number
CN217053592U
CN217053592U CN202220708268.0U CN202220708268U CN217053592U CN 217053592 U CN217053592 U CN 217053592U CN 202220708268 U CN202220708268 U CN 202220708268U CN 217053592 U CN217053592 U CN 217053592U
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China
Prior art keywords
pipeline
isolation valve
section pipeline
seawater
water
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CN202220708268.0U
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Chinese (zh)
Inventor
余俨
纪园园
王海平
杨浩然
姚尧
潘清坤
刘鹏
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Xian Thermal Power Research Institute Co Ltd
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Xian Thermal Power Research Institute Co Ltd
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Abstract

The utility model discloses a temporary seawater taking device for nuclear power plants, which comprises a water taking pipeline, an ascending section pipeline, a horizontal section pipeline, a high-level isolation valve, a vacuum pump inlet isolation valve, a vacuum pump, a submersible pump, a water filling isolation valve, a descending section pipeline, a low-level isolation valve, an ascending section pipeline and a seawater pool; a water intake filter screen is arranged at the inlet of the water intake pipeline, the outlet of the water intake pipeline is communicated with the inlet of the seawater pool through an ascending section pipeline, a horizontal section pipeline, a high-level isolation valve, a descending section pipeline, a low-level isolation valve and a lifting section pipeline, an air exhaust port and a vacuum pumping port are arranged on the horizontal section pipeline, and an exhaust valve is arranged at the air exhaust port; the vacuum pump is communicated with the vacuumizing port through a vacuum pump inlet isolation valve; the outlet of the submersible pump is communicated with the horizontal section pipeline through the water-filling isolation valve, and the device has the advantages of low water supply cost, low power consumption and better economic benefit.

Description

Nuclear power plant is with interim water intaking device of sea water
Technical Field
The utility model belongs to nuclear power plant's sea water intaking field relates to a nuclear power plant uses interim water intaking device of sea water.
Background
The installation and debugging period of the nuclear power plant is long, the requirement on a seawater cold source during installation and debugging is large, and the requirement time is different from dozens of days to months. In order to meet the cooling requirements of equipment during installation and debugging, under the condition that relevant marine engineering such as a circulating water intake of a nuclear power plant is not completed, multiple temporary pumps are generally adopted to pump water to a seawater pool in a plant area, or a combination of a temporary water supply device and an air cooling tower is additionally arranged to provide cooling water so as to meet the requirements of a field cold source. The temporary water supply device has high purchase cost and limited water supply and cooling capacity limited by capacity, and the water pump runs for a long time under large flow and has very high power consumption and very low economic benefit.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a nuclear power plant with interim water intake device of sea water, the device's water supply is with low costs, and power consumption is little, and economic benefits is better.
In order to achieve the purpose, the temporary seawater taking device for the nuclear power plant comprises a water taking pipeline, an ascending section pipeline, a horizontal section pipeline, a high-level isolation valve, a vacuum pump inlet isolation valve, a vacuum pump, a submersible pump, a water filling isolation valve, a descending section pipeline, a low-level isolation valve, an ascending section pipeline and a seawater pool;
a water intake filter screen is arranged at the inlet of the water intake pipeline, the outlet of the water intake pipeline is communicated with the inlet of the seawater pool through an ascending section pipeline, a horizontal section pipeline, a high-level isolation valve, a descending section pipeline, a low-level isolation valve and a lifting section pipeline, an air exhaust port and a vacuum pumping port are arranged on the horizontal section pipeline, and an exhaust valve is arranged at the air exhaust port; the vacuum pump is communicated with the vacuumizing port through a vacuum pump inlet isolation valve; the outlet of the submersible pump is communicated with the horizontal section pipeline through a water-filled isolating valve.
The intake filter screen is located the lowest sea water tide level.
The installation position of the vacuum pump is 10m higher than the high sea level.
The exhaust port is located at the highest point of the horizontal section of the pipeline.
The height of the lifting section pipeline is lower than that of the water intake filter screen.
The height of the pipeline at the elevated section is lower than that of the pipeline at the horizontal section.
The height difference between the lifting section pipeline and the horizontal section pipeline is more than or equal to 10 m.
The pipe diameters of the ascending section pipeline, the horizontal section pipeline, the high-position isolating valve, the descending section pipeline, the low-position isolating valve and the ascending section pipeline are all larger than or equal to 500 mm.
The utility model discloses following beneficial effect has:
the temporary seawater taking device for the nuclear power plant adopts a siphon establishing mode when in specific operation, seawater is extracted into a seawater pool, when the device is started, a submersible pump is utilized to perform initial water filling for a siphon pipeline, a vacuum pump provides initial water filling for a residual pipeline, seawater water supply is established by means of siphon after the water filling is finished, after siphon flow is established, the vacuum pump and the submersible pump are both in a long-term shutdown state, the siphon flow can ensure continuous, stable and large-flow seawater supply, the device is simple in structure, less in equipment and lower in purchasing cost, and cold source capacity requirements under different working conditions can be met; the vacuum pump and the submersible pump are only put into operation in the process of establishing siphon when the initial start is carried out, so that the electric quantity consumption is very low, a large amount of electricity cost is saved, and the economic benefit is better.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a water intake filter screen, 2 is an ascending section pipeline, 3 is a horizontal section pipeline, 4 is a high-level isolation valve, 5 is a vacuum pump inlet isolation valve, 6 is a vacuum pump, 7 is an exhaust valve, 8 is a submersible pump, 9 is a water filling isolation valve, 10 is a descending section pipeline, 11 is a low-level isolation valve, 12 is a lifting section pipeline, and 13 is a seawater pool.
Detailed Description
In order to make the technical solutions of the present invention better understood, the drawings in the embodiments of the present invention will be combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments, and do not limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
A schematic structural diagram according to an embodiment of the present disclosure is shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Referring to fig. 1, the temporary seawater intake device for nuclear power plants of the present invention includes a water intake screen 1, an ascending pipeline 2, a horizontal pipeline 3, a high isolation valve 4, a vacuum pump inlet isolation valve 5, a vacuum pump 6, an exhaust valve 7, a submersible pump 8, a water filling isolation valve 9, a descending pipeline 10, a low isolation valve 11, a ascending pipeline 12, and a seawater pool 13;
a water intake filter screen 1 is arranged at the inlet of the water intake pipeline, the outlet of the water intake pipeline is communicated with the inlet of the seawater pool 13 through a rising section pipeline 2, a horizontal section pipeline 3, a high-level isolation valve 4, a falling section pipeline 10, a low-level isolation valve 11 and a rising section pipeline 12, an air exhaust port and a vacuum pumping port are arranged on the horizontal section pipeline 3, and an exhaust valve 7 is arranged at the air exhaust port; the vacuum pump 6 is communicated with the vacuumizing port through a vacuum pump inlet isolation valve 5; the outlet of the submersible pump 8 is communicated with the horizontal pipeline 3 through a water-filled isolating valve 9.
The intake filter screen 1 is positioned at the lowest tide level of the seawater.
The vacuum pump 6 is installed at a position 10m higher than the high sea water level.
The exhaust port is positioned at the highest point of the horizontal section pipeline 3, and the exhaust valve 7 is simultaneously used as a siphon breaking valve;
the height of the lifting section pipeline 12 is lower than that of the water intake filter screen 1, the height of the lifting section pipeline 12 is lower than that of the horizontal section pipeline 3, and the height difference between the lifting section pipeline 12 and the horizontal section pipeline 3 is larger than or equal to 10 m.
The pipe diameters of the ascending section pipeline 2, the horizontal section pipeline 3, the high-position isolation valve 4, the descending section pipeline 10, the low-position isolation valve 11 and the lifting section pipeline 12 are all larger than or equal to 500 mm.
The utility model discloses a working process does:
1) submersible pump 8 is filled with water
Closing the high-level isolation valve 4 and the low-level isolation valve 11, opening the exhaust valve 7 and the water-filling isolation valve 9, starting the submersible pump 8, filling seawater into a pipeline between the high-level isolation valve 4 and the low-level isolation valve 11 through the submersible pump 8, filling the pipeline 10 at the descending section and the pipeline 3 at the horizontal section with the seawater by virtue of gravity, stopping the submersible pump 8 after stable water flows out of the exhaust valve 7, and closing the water-filling isolation valve 9 and the exhaust valve 7.
2) The vacuum pump 6 is filled with water
Opening a vacuum pump inlet isolation valve 5, starting a vacuum pump 6, performing vacuum filling on the ascending section pipeline 2 and the horizontal section pipeline 3 until the ascending section pipeline 2 and the horizontal section pipeline 3 are full of seawater, then closing the vacuum pump inlet isolation valve 5, and stopping running the vacuum pump 6, wherein the position where the vacuum pump 6 is installed is 10m higher than the high sea water level, so as to ensure that the seawater cannot enter the vacuum pump 6.
3) Starting and operating water taking device
The high-position isolation valve 4 is opened, the low-position isolation valve 11 is gradually opened, under the siphoning effect, seawater enters the seawater pool 13 after sequentially passing through the water intake filter screen 1, the ascending section pipeline 2, the horizontal section pipeline 3, the high-position isolation valve 4, the descending section pipeline 10, the low-position isolation valve 11 and the ascending section pipeline 12, the seawater is continuously siphoned into the seawater pool 13 to be used as an on-site cold source, and no power device or power consumption power supply is needed during the period.
4) Water intake device pause
The low-level isolation valve 11 is closed gradually, the flow of seawater is suspended at the moment, and due to the existence of the lifting section pipeline 12, the low-level isolation valve 11 and the water seals formed by the front and rear pipelines thereof, so that the siphon efficiency reduction caused by the fact that air in the seawater pool 13 enters the pipeline when the low-level isolation valve is restarted is avoided, and siphon can be reestablished only by gradually opening the low-level isolation valve 11 when the low-level isolation valve is restarted.
5) Siphon break of water intake device
The exhaust valve 7 is also used as a siphon break valve; when the water taking device needs to be stopped in an emergency (water leakage, water leakage and the like), the exhaust valve 7 is manually opened, the siphon action of the whole water taking device is destroyed, and equipment maintenance can be carried out after water in a pipeline is drained.
Application case
A certain power plant needs 1200t/h of seawater flow as a cold source, if one water pump with the power consumption of 28.4 ten thousand yuan is used for pumping seawater, the water supply time lasts for 6 months, and the power consumption is about 43.2 ten thousand kilowatts. Not considering under the condition of equipment investment promptly, the power consumption expense can be saved 28.4 ten thousand yuan, if consider the equipment investment difference, the utility model discloses the expense that can save is more, and economic benefits is showing more.

Claims (8)

1. A temporary seawater taking device for a nuclear power plant is characterized by comprising a water taking pipeline, an ascending section pipeline (2), a horizontal section pipeline (3), a high-level isolation valve (4), a vacuum pump inlet isolation valve (5), a vacuum pump (6), a submersible pump (8), a water filling isolation valve (9), a descending section pipeline (10), a low-level isolation valve (11), an ascending section pipeline (12) and a seawater pool (13);
a water intake filter screen (1) is arranged at the inlet of the water intake pipeline, the outlet of the water intake pipeline is communicated with the inlet of a seawater pool (13) through a rising section pipeline (2), a horizontal section pipeline (3), a high-level isolation valve (4), a falling section pipeline (10), a low-level isolation valve (11) and a rising section pipeline (12), an air exhaust port and a vacuum pumping port are arranged on the horizontal section pipeline (3), and an exhaust valve (7) is arranged at the air exhaust port; the vacuum pump (6) is communicated with the vacuumizing port through a vacuum pump inlet isolation valve (5); the outlet of the submersible pump (8) is communicated with the horizontal pipeline (3) through a water-filling isolation valve (9).
2. The temporary seawater intake apparatus for a nuclear power plant according to claim 1, wherein the intake screen (1) is located at the lowest tide level of seawater.
3. The temporary intake apparatus for seawater for a nuclear power plant according to claim 1, wherein the vacuum pump (6) is installed at a position 10m higher than the high sea level.
4. The temporary intake apparatus for seawater for nuclear power plants according to claim 1, wherein the exhaust port is located at the highest point of the horizontal section pipe (3).
5. The temporary seawater intake apparatus for a nuclear power plant according to claim 1, wherein the height of the elevated pipe (12) is lower than the height of the intake screen (1).
6. The temporary seawater intake apparatus for a nuclear power plant according to claim 1, wherein the height of the elevated section of the pipeline (12) is lower than the height of the horizontal section of the pipeline (3).
7. The temporary seawater intake device for nuclear power plants according to claim 6, wherein the height difference between the elevated pipeline (12) and the horizontal pipeline (3) is greater than or equal to 10 m.
8. The temporary seawater intake device for the nuclear power plant according to claim 1, wherein the pipe diameters of the ascending section pipeline (2), the horizontal section pipeline (3), the high-level isolation valve (4), the descending section pipeline (10), the low-level isolation valve (11) and the ascending section pipeline (12) are all greater than or equal to 500 mm.
CN202220708268.0U 2022-03-29 2022-03-29 Nuclear power plant is with interim water intake device of sea water Active CN217053592U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220708268.0U CN217053592U (en) 2022-03-29 2022-03-29 Nuclear power plant is with interim water intake device of sea water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220708268.0U CN217053592U (en) 2022-03-29 2022-03-29 Nuclear power plant is with interim water intake device of sea water

Publications (1)

Publication Number Publication Date
CN217053592U true CN217053592U (en) 2022-07-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220708268.0U Active CN217053592U (en) 2022-03-29 2022-03-29 Nuclear power plant is with interim water intake device of sea water

Country Status (1)

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CN (1) CN217053592U (en)

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