CN215866302U - Chemical medium spraying device for nuclear power LOCA test - Google Patents

Abstract

The utility model relates to a chemical medium spray device for a nuclear power LOCA test, which comprises a high-temperature high-pressure test tank, a spray header, a closed container, a conveying pipeline, a conveying pump with a controller and a precise flow controller, wherein the spray header is arranged in the high-temperature high-pressure test tank, the closed container is filled with a chemical medium and communicated with the spray header through the conveying pipeline, the conveying pump is arranged on the conveying pipeline to provide conveying power, the precise flow controller is arranged on the conveying pipeline, the precise flow controller can detect the flow in the conveying pipeline and compare with a set flow value, and the precise flow controller is in signal connection with the controller of the conveying pump; the conveying pipeline is made of high-temperature-resistant, high-pressure-resistant and corrosion-resistant materials.

Description

Chemical medium spraying device for nuclear power LOCA test

Technical Field

The utility model relates to the field of nuclear power test equipment, in particular to a chemical medium spraying device for a nuclear power LOCA test.

Background

The LOCA test of the DBA accident and the serious accident of the nuclear power station is the most important environmental simulation test for the safety of the nuclear power station, and mainly relates to the spraying of high-temperature and high-pressure steam environmental conditions and alkaline or weakly-acidic chemical media (boric acid solution or boric acid and sodium phosphate solution and the like). The traditional spraying technology can only realize non-corrosive medium spraying under the ambient conditions of normal temperature and normal pressure, and cannot meet the requirement of LOCA test of DBA accident and serious accident of nuclear power station on corrosive chemical medium spraying under the ambient conditions of high temperature and high pressure. At present, no chemical medium spraying equipment under the high-temperature and high-pressure environment condition of LOCA test aiming at the DBA accident and the serious accident of the nuclear power station exists.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a chemical medium spray device for nuclear power LOCA test, which can spray corrosive chemical medium under high temperature and high pressure environment, and can realize real-time accurate control of chemical medium spray flow.

In order to achieve the purpose, the utility model provides a chemical medium spray device for a nuclear power LOCA test, which comprises a high-temperature high-pressure test tank, a spray header, a closed container, a conveying pipeline, a conveying pump with a controller and a precise flow controller, wherein the spray header is arranged in the high-temperature high-pressure test tank, the closed container is filled with a chemical medium and communicated with the spray header through the conveying pipeline, the conveying pump is arranged on the conveying pipeline to provide conveying power, the precise flow controller is arranged on the conveying pipeline, can detect the flow in the conveying pipeline and compare the flow with a set flow value, and is connected with the controller signal of the conveying pump; the conveying pipeline is made of high-temperature-resistant, high-pressure-resistant and corrosion-resistant materials.

Further, the device also comprises a valve with a controller, and the valve is arranged on the conveying pipeline.

Further, the delivery pump is a variable frequency magnetic pump.

Further, the pipeline is a stainless steel pipeline.

Further, the spray header is an atomization spray header.

Further, the test device also comprises a circulating return pipe, wherein the circulating return pipe is communicated with the bottom of the high-temperature high-pressure test tank and the closed container.

Furthermore, a circulating pump is arranged on the circulating return pipe.

As described above, the chemical spray device according to the present invention has the following advantageous effects:

through setting up high temperature high pressure test jar, shower head, closed container, pipeline, the delivery pump that has the controller and accurate flow controller, be used for in the high temperature high pressure test jar carrying out the spray test, during operation, the chemical medium pump sending the shower head with certain pressure in the closed container with the delivery pump, sprays in the high temperature high pressure test jar. And the chemical reagent that the delivery pump carried passes through precision flow controller, and precision flow controller uses the difference between the actual flow that detects and the flow of setting for as the signal, feeds back to the controller of delivery pump to this rotational speed of control delivery pump adjusts the delivery flow of chemical reagent, and the signal when the difference between actual flow and the flow of setting for 0 feeds back to the delivery pump, and the delivery pump is at the uniform velocity and rotates, reaches the constant flow and sprays. The chemical medium spraying device can spray corrosive chemical media under the high-temperature and high-pressure environment condition, and can realize real-time accurate control of the spraying flow of the chemical media, so that constant-flow spraying is performed according to different test requirements.

Drawings

Fig. 1 is a schematic structural diagram of a chemical spray device of the present invention.

Description of the element reference numerals

1 high-temperature high-pressure test tank

2 spray head

3 valve

4 precision flow controller

5 conveying pipeline

6 delivery pump

7 closed container

8 circulation return pipe

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right" and "middle" used in the present specification are for convenience of description only, and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be regarded as the scope of the present invention without substantial changes in the technical contents.

Referring to fig. 1, the utility model provides a chemical medium spray device for nuclear power LOCA test, which comprises a high-temperature high-pressure test tank 1, a spray header 2, a closed container 7, a conveying pipeline 5, a conveying pump 6 with a controller and a precise flow controller 4, wherein the spray header 2 is arranged in the high-temperature high-pressure test tank 1, the closed container 7 is filled with chemical medium and communicated with the spray header 2 through the conveying pipeline 5, the conveying pump 6 is arranged on the conveying pipeline 5 to provide conveying power, the precise flow controller 4 is arranged on the conveying pipeline 5, the precise flow controller 4 can detect the flow in the conveying pipeline 5 and compare with a set flow value, and the precise flow controller 4 is in signal connection with the controller of the conveying pump 6; the conveying pipeline 5 is made of high-temperature and high-pressure resistant and corrosion-resistant materials. The part of the chemical medium spraying device, which is in direct contact with the chemical medium, is made of a high-temperature and high-pressure resistant and corrosion resistant material, such as a high-temperature stainless steel material. And all the parts are connected in a sealing way, so that a sealing system is formed inside the chemical medium spraying device.

The utility model relates to a chemical medium spraying device, wherein a high-temperature high-pressure test tank 1 is used for carrying out a spraying test, a closed container 7 is filled with chemical media such as boric acid solution or boric acid and sodium phosphate solution, and the like, when the chemical medium spraying device works, a conveying pump 6 acts to provide enough conveying power, the chemical media in the closed container 7 are pumped to a spraying head 2 at a certain pressure (higher than the pressure in the high-temperature high-pressure test tank 1), and the chemical media are sprayed in the high-temperature high-pressure test tank 1. Setting a required flow rate in the flow controller, feeding the chemical reagent conveyed by the conveying pump 6 through the precision flow controller 4, feeding the difference between the detected actual flow rate and the set flow rate as a signal by the precision flow controller 4 to the controller of the conveying pump 6 so as to control the rotating speed of the conveying pump 6, and determining the liquid flow rate by the rotating speed of the conveying pump 6 so as to adjust the conveying flow rate of the chemical reagent; when the difference between the actual flow and the set flow is 0, a signal is fed back to the delivery pump 6, and the delivery pump 6 rotates at a constant speed to achieve constant flow spraying. The chemical medium spraying device can spray corrosive chemical media under the high-temperature and high-pressure environment condition, and can realize real-time accurate control of the spraying flow of the chemical media, so that constant-flow spraying is performed according to different test requirements.

In the present embodiment, referring to fig. 1, as a preferred design, a valve 3 with a controller is further included, and the valve 3 is arranged on the conveying pipeline 5 and is positioned at the downstream of the precision flow controller 4. The controller of the valve 3 can be connected with a control system, and the spraying switch control of any time period can be implemented through the valve 3. Preferably, the controller of the valve 3 is in signal communication with the precision flow controller 4, and the valve 3 is closed in time when a flow anomaly is detected.

In this embodiment, referring to fig. 1, as an optimal design, the delivery pump 6 is a variable frequency magnetic pump, which has good sealing performance and can meet the requirements of high temperature and high pressure, and the rotational speed adjustment is fast and timely, so that the delivery flow can be conveniently and timely adjusted. The conveying pipeline 5 can be a stainless steel pipeline, and has high temperature resistance and good corrosion resistance. The spray header 2 adopts the special atomizing spray header 2, ensures that the spray header can smoothly spray under the high-pressure environment in the high-temperature high-pressure test tank 1, has good spray effect and ensures the test effect.

In this embodiment, referring to fig. 1, as a preferred design, the chemical medium spraying device further includes a circulation return pipe 8, the circulation return pipe 8 communicates the bottom of the high-temperature and high-pressure test tank 1 with the closed container 7, and under the action of the pressure difference, the chemical reagent at the bottom of the high-temperature and high-pressure test tank 1 returns to the closed container 7 through the circulation return pipe 8 for recycling, so as to reduce the consumption of the reagent. And a circulation pump may be provided on the circulation return pipe 8 to supplement the circulation power as appropriate.

The chemical medium spraying device can be used for nuclear power LOCA tests and can also be used for spraying in other high-temperature, high-pressure and corrosive environments.

From the above, the chemical spraying device in this embodiment has the following advantages:

1. the spraying of corrosive chemical media can be implemented under the high-temperature and high-pressure environment condition, and the flow of the chemical media spraying can be accurately controlled according to the requirement, so that the constant-flow spraying is realized, and the effect and the safety of a spraying test are ensured; 2. the chemical medium spraying time period can be controlled at will; 3. the mist spraying of the chemical medium can be realized; 4. the chemical medium can be recycled, continuous circulating constant-flow spraying is carried out, reagent consumption is saved, and cost is reduced.

To sum up, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (7)

1. A chemical medium spray set for nuclear power LOCA test which characterized in that: the device comprises a high-temperature high-pressure test tank (1), a spray header (2), a closed container (7), a conveying pipeline (5), a conveying pump (6) with a controller and a precise flow controller (4), wherein the spray header (2) is arranged in the high-temperature high-pressure test tank (1), the closed container (7) is filled with a chemical medium and communicated with the spray header (2) through the conveying pipeline (5), the conveying pump (6) is arranged on the conveying pipeline (5) to provide conveying power, the precise flow controller (4) is arranged on the conveying pipeline (5), the precise flow controller (4) can detect the flow in the conveying pipeline (5) and compare with a set flow value, and the precise flow controller (4) is connected with a controller signal of the conveying pump (6); the conveying pipeline (5) is made of high-temperature-resistant, high-pressure-resistant and corrosion-resistant materials.

2. The chemical spray device of claim 1, wherein: the device also comprises a valve (3) with a controller, wherein the valve (3) is arranged on the conveying pipeline (5).

3. The chemical spray device of claim 1, wherein: the conveying pump (6) is a variable frequency magnetic pump.

4. The chemical spray device of claim 1, wherein: the conveying pipeline (5) is a stainless steel pipeline.

5. The chemical spray device of claim 1, wherein: the spray header (2) is an atomization spray header.

6. The chemical spray device of claim 1, wherein: the device is characterized by further comprising a circulating return pipe (8), wherein the circulating return pipe (8) is communicated with the bottom of the high-temperature and high-pressure test tank (1) and the closed container (7).

7. The chemical spray device of claim 6, wherein: and the circulating return pipe (8) is also provided with a circulating pump.

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