Emergency adding device for defoaming agent of nuclear power plant

Abstract

The utility model discloses a nuclear power plant defoaming agent emergency dosing device which is used for injecting a defoaming agent into a defoaming pool and comprises a solvent box, a defoaming agent storage box, a main flow pipeline, a shunting device, at least one shunting pipeline and a power supply system. According to the emergency dosing device for the defoaming agent in the nuclear power plant, the solvent box is arranged at a high position, so that the defoaming agent in the solvent box can be injected into the defoaming pool through gravity, flowing of the defoaming agent is achieved through the height, and the circulating water draining and defoaming functions are achieved. And a main flow pipeline, a flow dividing device and a flow dividing pipeline are arranged, so that one solvent tank can be used for filling a plurality of defoaming pools at the same time. Meanwhile, by means of the arrangement of the photovoltaic panel, solar power supply can be achieved under the condition of power failure, it is guaranteed that the emergency defoaming agent dosing device for the nuclear power plant can operate normally under special conditions, and the requirement that the defoaming agent can be automatically injected into the defoaming pool under the conditions of water cut-off, power failure or typhoon weather can be met.

Description

Technical Field

[0001] The utility model relates to an antifoaming chemical dosing system for nuclear power plants, in particular to an emergency chemical dosing device for antifoaming agents in nuclear power plants. Background Art

[0002] CRG is a circulating water antifoaming chemical dosing system. During the operation of a nuclear power plant, due to different tide levels, foam sometimes occurs, which has an adverse impact on the environmental vision and does not conform to the clean and environmentally friendly image of the nuclear power plant. In response, the nuclear power plant has designed the CRG system to continuously add antifoaming agents to the circulating water drainage system to reduce the adverse impact of foam on the environment and achieve green production.

[0003] In the case of power outages, water outages and other factors, manual chemical dosing is required for the CRG system. Considering the safety issues of outdoor manual chemical dosing (the chemical dosing position is at the water channel outlet, there is a risk of falling, and the chemical agent itself is also harmful to human health), manual chemical dosing is not arranged at night, and the continuous manual chemical dosing time does not exceed 8 hours, that is, the current maintenance work affecting the operation of the CRG system shall not exceed 8 hours, which affects the normal operation of the CRG system. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an emergency chemical dosing device for antifoaming agents in nuclear power plants.

[0005] The technical solution adopted by the utility model to solve its technical problems is: to construct an emergency chemical dosing device for antifoaming agents in nuclear power plants, which is used to inject antifoaming agents into the antifoaming tank, and includes a solvent tank, an antifoaming agent storage tank, a main pipeline, a flow splitting device, at least one flow splitting pipeline and a power supply system for powering the device;

[0006] The solvent tank is arranged higher than the antifoaming tank, and the antifoaming agent storage tank is connected to the solvent tank through an external pipe to supplement the solvent tank with antifoaming agents;

[0007] Both ends of the main pipeline are respectively connected to the solvent tank and the flow splitting device, the input end of each flow splitting pipeline is connected to the flow splitting device, and the output end of each flow splitting pipeline is connected to the antifoaming tank;

[0008] The power supply system includes a plant power supply and a photovoltaic panel.

[0009] In some embodiments, a liquid level gauge is connected to the solvent tank.

[0010] In some embodiments, a main control valve is provided on the main pipeline.

[0011] In some embodiments, a branch control valve is provided on each flow splitting pipeline.

[0012] In some embodiments, a flow meter is provided on each of the shunt pipes.

[0013] In some embodiments, the shunt device is a three-way valve or a shunt.

[0014] In some embodiments, the emergency chemical dosing device for defoamer in nuclear power plants further includes a monitor installed in the defoaming tank and used to monitor the defoaming tank.

[0015] In some embodiments, the emergency chemical dosing device for defoamer in nuclear power plants further includes a host computer for control and display.

[0016] In some embodiments, the host computer is a computer, a mobile phone or a tablet.

[0017] In some embodiments, the emergency chemical dosing device for defoamer in nuclear power plants further includes a wireless transmission module.

[0018] Implementing the present utility model has the following beneficial effects: By setting the solvent tank at a high position, the defoamer in the solvent tank can be filled into the defoaming tank by gravity, and the flow of the defoamer is achieved through the height, realizing the defoaming function of the circulating water drainage. Moreover, by setting the main pipeline, the shunt device and the shunt pipes, one solvent tank can be used to fill multiple defoaming tanks at the same time. Meanwhile, by setting the photovoltaic panel, solar power supply can be realized in the case of power outage, ensuring that the emergency chemical dosing device for defoamer in nuclear power plants can operate normally under special circumstances, and it can automatically inject defoamer into the defoaming tank in the case of water cut, power outage or typhoon weather. It replaces manual chemical dosing, avoids great potential safety hazards when manually adding defoamer, saves labor costs at the same time, and speeds up the chemical dosing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the present utility model, the present utility model will be further described below in conjunction with the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0020] Figure 1 is a schematic structural diagram of the emergency chemical dosing device for defoamer in nuclear power plants in some embodiments of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to have a clearer understanding of the technical features, objectives, and effects of the present utility model, the specific implementation manners of the present utility model will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by terms such as "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings and are in a specific orientation structure and operation, and are only for the convenience of describing the present technical solution, rather than indicating that the indicated device or element must have a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0022] It should also be noted that, unless otherwise clearly specified and defined, terms such as "installation", "connection", "attachment", "fixation", "setting", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. When an element is referred to as being "above" or "below" another element, the element can be "directly" or "indirectly" located above the other element, or there may also be one or more intermediate elements. Terms such as "first", "second", "third", etc. are only for the convenience of describing the present technical solution and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] Referring to Figure 1 , it is an emergency chemical addition device for defoamer in a nuclear power plant in some embodiments of the present utility model, which is used to inject defoamer into the defoaming tank 1. The emergency chemical addition device for defoamer in a nuclear power plant includes a solvent tank 2, a defoamer storage tank 3, a main pipeline 4, a flow splitting device 5, at least one flow splitting pipeline 6, and a power supply system 7 for powering the device. The solvent tank 2 is arranged higher than the defoaming tank 1. The defoamer storage tank 3 is connected to the solvent tank 2 through an external connection pipe 31 to replenish the defoamer for the solvent tank 2. Both ends of the main pipeline 4 are respectively connected to the solvent tank 2 and the flow splitting device 5. The input end of each flow splitting pipeline 6 is connected to the flow splitting device 5, and the output end of each flow splitting pipeline 6 is connected to the defoaming tank 1.

[0024] Specifically, the solvent tank 2 is used to store the defoamer. The solvent tank 2 is set at a high position. The defoamer in the solvent tank 2 can be filled into the defoaming tank 1 by gravity, that is, the flow of the defoamer is realized through the height, achieving the defoaming function for the drainage of circulating water. The defoamer storage tank 3 can supplement the defoamer for the solvent tank 2. The defoamer can be prepared in advance or connected to an automatic dosing device.

[0025] In this embodiment, the number of the shunt pipes 6 is two. The defoamer enters the defoaming tank 1 after passing through the main pipe 4, the shunt device 5, and the shunt pipes 6 in sequence. In some other embodiments, the number of the shunt pipes 6 can also be one or more than two, which can be set according to the number of the defoaming tanks 1 to be filled, and no specific limitation is made here. And the shunt device 5 is a three-way valve or a diverter.

[0026] In addition, the power supply system 7 includes a plant power supply and a photovoltaic panel 71. The power supply system 7 mainly supplies power to the electrical components in the emergency defoamer dosing device of the nuclear power plant. Generally, the plant power supply is used for power supply. For example, when performing relevant maintenance work without power outage, the plant power supply provides the power supply for the emergency defoamer dosing device of the nuclear power plant. When the plant power supply is out of power, solar power supply is realized through the photovoltaic panel 71. The photovoltaic panel 71 is equipped with a corresponding storage battery, and the storage battery can maintain the power for a long time.

[0027] It can be understood that by setting the solvent tank 2 at a high position, the defoamer in the solvent tank 2 can be filled into the defoaming tank 1 by gravity, and the flow of the defoamer is realized through the height, achieving the defoaming function for the drainage of circulating water. And by using the settings of the main pipe 4, the shunt device 5, and the shunt pipes 6, one solvent tank 2 can fill multiple defoaming tanks 1 at the same time. At the same time, by using the setting of the photovoltaic panel 71, solar power supply can be realized in the case of power outage, ensuring that the emergency defoamer dosing device of the nuclear power plant can also operate normally in special situations, and it can meet the requirement of automatically injecting the defoamer into the defoaming tank 1 in the case of water cut, power outage or typhoon weather. Moreover, it replaces manual dosing, avoids great potential safety hazards when manually adding the defoamer, saves labor costs at the same time, and speeds up the dosing efficiency.

[0028] Among them, a liquid level gauge 21 is connected to the solvent tank 2. The liquid level gauge 21 detects the liquid level of the defoamer in the solvent tank 2 and can be connected to the solvent tank 2 through a special pipeline and a valve.

[0029] A main control valve 41 is provided on the main pipeline 4 to control the on-off of the main pipeline 4, which is the first control switch to determine whether the defoamer flows out. A branch control valve 61 is provided on each branch pipeline 6 to control the on-off of the branch pipeline 6, so as to determine whether to inject the defoamer into the corresponding defoaming tank 1. A flowmeter 62 is provided on each branch pipeline 6 to monitor the flow rate of the defoamer in the branch pipeline 6 and provide information feedback, so as to facilitate the control of the outflow rate of the defoamer.

[0030] The emergency defoamer dosing device for nuclear power plants further includes a monitor installed in the defoaming tank 1 and used to monitor the defoaming tank 1. The monitor uses high-definition video to monitor the defoaming tank 1, and can achieve real-time monitoring of the defoaming tank 1 to facilitate viewing the on-site working conditions and adjusting the amount of injected defoamer. The monitor is independently powered.

[0031] The emergency defoamer dosing device for nuclear power plants further includes a host computer for control and display, and the host computer is a computer, a mobile phone or a tablet. The host computer is communicatively connected to the above-mentioned liquid level gauge 21, main control valve 41, branch control valve 61, and flowmeter 62 to achieve information feedback or receive control.

[0032] The emergency defoamer dosing device for nuclear power plants further includes a wireless transmission module, which can transmit the information of the liquid level gauge 21, main control valve 41, branch control valve 61, and flowmeter 62 to the host computer, so that the operator can perform remote operations.

[0033] It can be understood that the above embodiments only represent the preferred embodiments of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention; therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. An emergency chemical dosing device for defoamer in a nuclear power plant, which is used to inject defoamer into a defoaming tank (1), characterized in that, It includes a solvent tank (2), an antifoaming agent storage tank (3), a main pipeline (4), a flow splitting device (5), at least one flow splitting pipeline (6), and a power supply system (7) for powering the device; The solvent tank (2) is arranged higher than the antifoaming pond (1), and the antifoaming agent storage tank (3) is connected to the solvent tank (2) through an external pipe (31) to supplement the antifoaming agent to the solvent tank (2); Both ends of the main pipeline (4) are respectively connected to the solvent tank (2) and the flow splitting device (5), the input end of each flow splitting pipeline (6) is connected to the flow splitting device (5), and the output end of each flow splitting pipeline (6) is connected to the antifoaming pond (1); The power supply system (7) includes a plant power supply and a photovoltaic panel (71).

2. The emergency chemical adding device for defoamer in a nuclear power plant according to claim 1, wherein, A liquid level gauge (21) is connected to the solvent tank (2).

3. The emergency chemical dosing device for defoamer in a nuclear power plant according to claim 1, characterized in that, A main control valve (41) is provided on the main pipeline (4).

4. The emergency chemical dosing device for defoamer in nuclear power plants according to claim 1, wherein, A sub-control valve (61) is provided on each flow splitting pipeline (6).

5. The emergency chemical dosing device for defoamer in a nuclear power plant according to claim 1, wherein A flowmeter (62) is provided on each flow splitting pipeline (6).

6. The emergency chemical addition device for defoamer in a nuclear power plant according to claim 1, wherein, The flow splitting device (5) is a three-way valve or a flow splitter.

7. The emergency chemical dosing device for defoamer in a nuclear power plant according to claim 1, wherein The nuclear power plant antifoaming agent emergency dosing device further includes a monitor installed in the antifoaming pond (1) and used for monitoring the antifoaming pond (1).

8. The emergency chemical dosing device for defoamer in a nuclear power plant according to claim 1, characterized in that, The nuclear power plant antifoaming agent emergency dosing device further includes a host computer for control and display.

9. The emergency chemical adding device for defoamer in a nuclear power plant according to claim 8, wherein, The host computer is a computer, a mobile phone or a tablet.

10. The emergency chemical dosing device for defoamer in a nuclear power plant according to claim 1, characterized in that, The nuclear power plant antifoaming agent emergency dosing device further includes a wireless transmission module.

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