阅读说明：本技术 一种用于核电厂的地坑泵系统 (Pit pump system for nuclear power plant ) 是由 姜旭东 胡晓春 徐刚 孙小波 柴庆竹 王岳 严经星 于 2021-03-05 设计创作，主要内容包括：本发明涉及核电厂工艺布置领域,特别涉及一种用于核电厂的地坑泵系统,包括、废水收集箱、废水液位仪表,设置在所述废水收集箱上方,用于检测所述废水收集箱中的废水液位高度、抽水装置,用于将所述废水收集箱中的废水抽出废水收集箱,所述抽水装置的抽水管路连入所述废水收集箱内,所述抽水装置的排水管路连接至外部的废水处理系统,以及用于根据水位控制抽水装置启动的控制装置,本发明相比于现有技术,可以在整个核电厂寿期内确保放射性废水不泄漏,通过液位检测及废气抽排,可以实现地坑箱内放射性废水的容积控制及放射性气体累积超压控制。(The invention relates to the field of nuclear power plant process arrangement, in particular to a pit pump system for a nuclear power plant, which comprises a wastewater collection box, a wastewater level meter, a water pumping device, a control device and a control device, wherein the wastewater level meter is arranged above the wastewater collection box and used for detecting the wastewater level height in the wastewater collection box, the water pumping device is used for pumping wastewater in the wastewater collection box out of the wastewater collection box, a water pumping pipeline of the water pumping device is connected into the wastewater collection box, a water drainage pipeline of the water pumping device is connected to an external wastewater treatment system, and the control device is used for controlling the start of the water pumping device according to the water level.)

1. A pit pump system for a nuclear power plant, comprising:

the four corners of the bottom of the wastewater collecting box are provided with supporting feet, and the side wall of the wastewater collecting box is provided with a wastewater inlet;

the wastewater liquid level meter is arranged above the wastewater collection box and used for detecting the wastewater liquid level height in the wastewater collection box;

the water pumping device is used for pumping the wastewater in the wastewater collection box out of the wastewater collection box, a water pumping pipeline of the water pumping device is connected into the wastewater collection box, and a water discharging pipeline of the water pumping device is connected to an external wastewater treatment system;

the control device is in communication connection with the wastewater level meter and the water pumping device, and when the reading of the wastewater level meter is larger than a high 1 threshold value, the control device sends an opening signal to the water pumping device to enable the water pumping device to start working, so that the wastewater in the wastewater collection tank is pumped out and discharged to an external wastewater treatment system; when the reading of the wastewater liquid level meter is less than a low threshold value of 1, the control device sends a stop signal to the water pumping device, and the water pumping device stops working;

the working end of the waste gas treatment device is connected to a waste gas pumping and discharging port arranged on the waste water collecting box through a pipeline;

the box body part of the waste water collecting box is buried underground, and waste water flows into the waste water inflow port under the action of gravity.

2. The pit pump system for nuclear power plant of claim 1, wherein the pumping device comprises a first diaphragm pump and a second diaphragm pump, and the control device sends an activation signal to the first diaphragm pump to activate the first diaphragm pump when the reading of the wastewater level meter is greater than a high 1 threshold; when the reading of the wastewater liquid level meter is larger than the high 2 threshold value, the control device sends an opening signal to the second diaphragm pump to enable the second diaphragm pump to start working; and when the reading of the wastewater liquid level meter is less than the low 1 threshold value, the control device sends stop signals to the first diaphragm pump and the second diaphragm pump to stop the first diaphragm pump and the second diaphragm pump.

3. The pit pump system for nuclear power plant of claim 2, wherein the first diaphragm pump and the second diaphragm pump are disposed at an upper portion of the wastewater collection tank, and the first diaphragm pump and the second diaphragm pump are fixedly connected to a top cover of the wastewater collection tank by bolts.

4. The pit pump system for nuclear power plant of claim 1, wherein the control device includes a sensor that receives a level height signal from the wastewater level meter and transmits the signal to the water pumping device.

5. A pit pump system for a nuclear power plant according to claim 1, characterized in that the exhaust extraction opening opens on the top cover of the waste collection tank.

6. The pit pump system for nuclear power plant according to claim 1, wherein the supporting legs are integrally buried in the ground, an upper end of each supporting leg is fixedly connected to a bottom of the waste water collecting tank by a bolt, and a lower end of each supporting leg is inserted into external nuclear island raft-based concrete.

7. The pit pump system for nuclear power plant according to claim 1, characterized in that an auxiliary steel structure for auxiliary support is further provided above the top cover of the wastewater collection tank, and the auxiliary steel structure has a function of supporting pipes and equipment.

Technical Field

The invention relates to the field of nuclear power plant process arrangement, in particular to a pit pump system for a nuclear power plant.

Background

The radioactive control area of the nuclear power plant is internally provided with pipelines, equipment, valves, instruments and other items of a radioactive system. No matter flange gap leakage, safety valve take-off, system drainage and the like, a large amount of radioactive drainage can be generated. The part of radioactive hydrophobic water enters a radioactive waste water drainage system through a floor drain.

If the radioactive wastewater evacuation system adopts a common water tank or a water tank to collect and temporarily store wastewater, the radioactive accumulation and leakage in the water tank or the water tank are easily caused, the radioactive accumulation and leakage are very difficult to clean or the cleaning cost is very high, and the risk of exceeding the dosage level of operation and maintenance personnel exists.

Accordingly, there remains a need in the art for improvements.

Disclosure of Invention

The invention aims to solve the problems that the collection and temporary storage of radioactive wastewater is inconvenient and the construction period of a pit is long in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

the present invention provides a pit pump system for a nuclear power plant, comprising:

the four corners of the bottom of the wastewater collecting box are provided with supporting feet, and the side wall of the wastewater collecting box is provided with a wastewater inlet;

the wastewater liquid level meter is arranged above the wastewater collection box and used for detecting the wastewater liquid level height in the wastewater collection box;

the water pumping device is used for pumping the wastewater in the wastewater collection box out of the wastewater collection box, a water pumping pipeline of the water pumping device is connected into the wastewater collection box, and a water discharging pipeline of the water pumping device is connected to an external wastewater treatment system;

the control device is in communication connection with the wastewater level meter and the water pumping device, and when the reading of the wastewater level meter is larger than a first threshold value, the control device sends an opening signal to the water pumping device to enable the water pumping device to start working, so that the wastewater in the wastewater collection tank is pumped out and discharged to an external wastewater treatment system; when the reading of the wastewater liquid level meter is smaller than a first threshold value, the control device sends a stop signal to the water pumping device, and the water pumping device stops working;

the working end of the waste gas treatment device is connected to a waste gas pumping and discharging port arranged on the waste water collecting box through a pipeline;

the box body of the waste water collecting box is at least partially buried underground, and waste water flows into the waste water inflow port under the action of gravity.

Further, the water pumping device comprises a first diaphragm pump and a second diaphragm pump, and when the reading of the wastewater level meter is greater than a high 1 threshold value, the control device sends an opening signal to the first diaphragm pump to enable the first diaphragm pump to start working; when the reading of the wastewater liquid level meter is larger than the high 2 threshold value, the control device sends an opening signal to the second diaphragm pump to enable the second diaphragm pump to start working; and when the reading of the wastewater liquid level meter is less than the low 1 threshold value, the control device sends stop signals to the first diaphragm pump and the second diaphragm pump to stop the first diaphragm pump and the second diaphragm pump.

Furthermore, the first diaphragm pump and the second diaphragm pump are arranged on the upper part of the wastewater collection box, and the first diaphragm pump and the second diaphragm pump are fixedly connected with a top cover of the wastewater collection box through bolts.

Further, controlling means includes the sensor, the sensor is received and is gathered the liquid level height signal of waste water liquid level instrument to with signal transmission to pumping device.

Furthermore, the waste gas pumping and discharging port is arranged on a top cover of the waste water collecting box.

Furthermore, the support feet are integrally buried underground, the upper end of each support foot is fixedly connected with the bottom of the wastewater collection box through a bolt, and the lower end of each support foot is inserted into the external nuclear island raft base concrete.

Furthermore, an auxiliary steel structure for auxiliary support is further arranged above the top cover of the wastewater collection box, and the auxiliary steel structure has the functions of supporting pipelines and equipment.

The invention has the beneficial effects that: the construction period of on-site installation is effectively shortened, the anti-seismic performance, the corrosion resistance and the sealing performance are good, the radioactive wastewater can be ensured not to leak in the service life of the whole nuclear power plant, and the volume control of the radioactive wastewater in the pit box can be realized through liquid level detection; through setting up the gas escape interface, can avoid the interior radioactive gas of pit case to accumulate the superpressure, adopt standardized module design, applicable in the nuclear power station of multiple heap type, the parameter of pit case size and pump is optimized to the accessible, the packing design, and the whole supply of material reduces the design interface, reduces the design degree of difficulty, improves site operation efficiency and installation quality.

Drawings

FIG. 1 is an overall block diagram of a sump pump system provided by the present invention;

fig. 2 is a schematic structural view of a pit pump system provided by the present invention in an installed state.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1, the present invention provides a pit pump system for a nuclear power plant, comprising:

the waste water collecting box 7 is provided with supporting feet 8 at the four corners of the bottom and a waste water inlet 3 on the side wall;

the wastewater liquid level meter 4 is arranged above the wastewater collection box 7 and used for detecting the wastewater liquid level height in the wastewater collection box 7;

the water pumping device 1 is used for pumping the wastewater in the wastewater collection tank 7, a water pumping pipeline 2 of the water pumping device 1 is connected into the wastewater collection tank 7, and a water discharging pipeline of the water pumping device 1 is connected to an external wastewater treatment system;

the control device is in communication connection with the wastewater liquid level meter 4 and the water pumping device 1, and when the reading of the wastewater liquid level meter 4 is larger than a high threshold value of 1, the control device sends an opening signal to the water pumping device 1 to enable the water pumping device 1 to start working, and the wastewater in the wastewater collection tank 7 is pumped out and discharged to an external wastewater treatment system; when the reading of the wastewater liquid level meter 4 is smaller than the low 1 threshold value, the control device sends a stop signal to the water pumping device 1, and the water pumping device 1 stops working;

an exhaust gas treatment device (not shown in the figure), the working end of which is connected to an exhaust gas pumping and discharging port 6 provided on the waste water collection tank 7 through a pipeline;

the body of the waste water collecting tank 7 is at least partially buried underground, and waste water flows into the waste water inflow port 3 by the action of gravity.

Further, the water pumping device 1 comprises a first diaphragm pump and a second diaphragm pump, and when the reading of the wastewater level meter 4 is greater than the high 1 threshold, the control device sends an opening signal to the first diaphragm pump to enable the first diaphragm pump to start to work; when the reading of the wastewater liquid level meter 4 is greater than the high 2 threshold value, the control device sends an opening signal to the second diaphragm pump to enable the second diaphragm pump to start working; when the reading of the wastewater level meter 4 is less than the low 1 threshold, the control device sends stop signals to the first and second diaphragm pumps to stop the first and second diaphragm pumps from working.

Further, the first diaphragm pump and the second diaphragm pump are arranged on the upper portion of the wastewater collection box 7, and the first diaphragm pump and the second diaphragm pump are fixedly connected with a top cover of the wastewater collection box 7 through bolts.

Further, the control device comprises a sensor 5, wherein the sensor 5 receives and collects a liquid level height signal of the wastewater liquid level meter 4 and transmits the signal to the water pumping device 1.

Further, the exhaust gas pumping and discharging port 6 is arranged on a top cover of the waste water collecting box 7.

Further, the supporting feet 8 are integrally buried underground, the upper end of each supporting foot 8 is fixedly connected with the bottom of the wastewater collection tank 7 through a bolt, and the lower end of each supporting foot 8 is inserted into the external nuclear island raft base concrete 10.

Further, still be equipped with the supplementary steel construction 9 that is used for auxiliary stay above the top cap of wastewater collection box 7, supplementary steel construction 9 possesses the function of supporting pumping device 1, drinking-water pipeline 2 and waste water level meter 4.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.