CN215339116U

CN215339116U - Radioactive gas sampling device with deoxidization function

Info

Publication number: CN215339116U
Application number: CN202121558952.7U
Authority: CN
Inventors: 李建兴; 林清湖; 郑彬; 于新霞; 吴若蕾
Original assignee: Hainan Nuclear Power Co Ltd
Current assignee: Hainan Nuclear Power Co Ltd
Priority date: 2021-07-09
Filing date: 2021-07-09
Publication date: 2021-12-28
Anticipated expiration: 2031-07-09

Abstract

The utility model relates to a radioactive gas sampling device with a deoxygenation function, which comprises a reaction box, a box cover and a plurality of guide plates, wherein a first air outlet pipe and a first air inlet pipe are respectively arranged at the top and the lower part of the reaction box, the box cover is hermetically covered on the top of the reaction box, the guide plates are arranged on the inner wall of the reaction box in a staggered manner through a dismounting part, the guide plates are respectively arranged along the inclined direction of the liquid flowing trend, an oxyhydrogen catalyst is arranged on the outer surface of each guide plate, a first electromagnetic valve is arranged on each first air inlet pipe, and the first air inlet pipes are connected with a sampling assembly. The problem of relatively poor safety is caused by the fact that a sampling device in the prior art cannot be used for deoxidizing and increasing the risk of explosion in the decay process.

Description

Radioactive gas sampling device with deoxidization function

Technical Field

The utility model belongs to the technical field of sampling devices, and particularly relates to a radioactive gas sampling device with a deoxygenation function.

Background

A power generating unit of a nuclear power plant needs to be provided with a cooling loop, and a coolant in the cooling loop is easily decomposed into hydrogen and oxygen (2H) under high-temperature and high-pressure conditions₂0→2H₂+O₂) The excessive oxygen can easily promote the oxidation corrosion of the cooling loop and can easily react with the hydrogen to produce explosion. In order to avoid the adverse effect caused by excessive accumulation of oxygen, chemical personnel need to regularly detect the content of hydrogen and oxygen in the radioactive gas in the cooling pipeline so as to ensure safe operation.

At present, take a sample through the sample steel bottle among the prior art, when the sample, for guaranteeing the accuracy of testing result, need be provided with the inlet end on the sample steel bottle and give vent to anger the end, the gas appearance gets into the sample steel bottle from the inlet end and then discharges into decay device through the end of giving vent to anger to avoid taking the gas appearance of anterior segment. The sample discharged from the sampling steel cylinder needs to be processed into harmless gas by a decay device and then discharged into the atmosphere. But the problems in the prior art are that: the gas of exhalant can not carry out the deoxidization in the sample process, and when higher content hydrogen and oxygen got into decay device and carry out the decay, increased the risk of explosion, caused the security relatively poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a radioactive gas sampling device with a deoxygenation function aiming at the defects of the prior art, so as to effectively solve the problems that the sampling device in the prior art cannot deoxygenate, the risk of explosion in the decay process is increased, and the safety is poor.

The technical scheme adopted by the utility model is as follows:

the utility model provides a radioactive gas sampling device with deoxidization function, includes reaction box, case lid and a plurality of guide plate, reaction box top and lower part are provided with first intake pipe and first outlet duct respectively, the sealed lid of case lid fits on the reaction box top, and is a plurality of the guide plate through the dismantlement part crisscross set up in on the reaction box inner wall, it is a plurality of the guide plate sets up along the direction slope of liquid flow trend respectively, the guide plate surface is provided with the oxyhydrogen catalyst, be provided with first solenoid valve in the first intake pipe, first intake pipe with the sampling subassembly is connected.

Furthermore, the disassembling component comprises a bracket arranged on the inner wall of the reaction box, and the guide plate is arranged on the bracket through a bolt.

Further, the sampling assembly comprises an outer box and a sampling container, a controller and a switch are arranged on the top of the outer box, a gas flow meter is arranged in the outer box, a second gas inlet pipe and a second gas outlet pipe are arranged on the gas flow meter, a first electromagnetic valve is arranged on the second gas outlet pipe, the controller is connected with the first electromagnetic valve and the switch respectively, the sampling container is placed in the outer box, a third gas inlet pipe and a third gas outlet pipe are arranged at two ends of the sampling container respectively, the first gas inlet pipe and the second gas outlet pipe are connected with the third gas outlet pipe and the third gas inlet pipe respectively through quick connectors, the second electromagnetic valve is arranged on the third gas outlet pipe and the third gas inlet pipe and connected with the controller through connectors.

Furthermore, the front end of the guide plate is arranged in a downward inclined mode.

Furthermore, a drain valve is arranged at the bottom of the reaction box.

Further, the hydrogen-oxygen catalyst is Pd/Pt-Al2O3 hydrophobic catalyst coating.

Compared with the prior art, the utility model has the beneficial effects that:

1. the radioactive gas discharged from the sampling assembly enters the reaction box through the first gas inlet pipe and reacts with the hydrogen-oxygen catalyst on the guide plate to generate the flame-retardant substance (water), so that the hydrogen-oxygen content in the radioactive gas is reduced, the explosion risk after the radioactive gas is directly discharged into the decay device is effectively reduced, and the safety is improved.

2. The radioactive gas entering the reaction box flows to the top of the reaction box along a plurality of channels formed by connecting the ends of the gas flow like Z shapes under the action of the guide plates, so that the flow of the gas flow is increased, the contact area of the gas flow and the hydrogen-oxygen catalyst is increased, and the hydrogen-oxygen reaction is more sufficient.

3. Utilize the guide plate all to set up along the slope of liquid flow trend direction, make the water that the oxyhydrogen reaction generated flow away from the guide plate, reduce the accumulation of guide plate upper water, improved the activity of oxyhydrogen catalyst, increase oxyhydrogen reaction efficiency.

4. Utilize the reaction box to collect the water that the oxyhydrogen reaction generated and the water that the in-process of taking a sample brought out, the drainage valve of rethread reaction box bottom discharges, collects and concentrated the emission to the radioactive water, has effectively avoided the direct discharge of radioactive water and has caused the problem of pollution to the environment.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the present invention after the sampling vessel is removed;

FIG. 3 is a schematic view of the structure of a sampling vessel according to the present invention;

FIG. 4 is an enlarged view taken at A-A in FIG. 1;

FIG. 5 is an enlarged view of FIG. 1 at B;

in the figure: 1. an outer box; 2. a reaction box; 3. a baffle; 4. a first air outlet pipe; 5. a box cover; 6. a switch; 7. a controller; 8. a gas flow meter; 9. a second intake pipe; 10. a second air outlet pipe; 11. a first solenoid valve; 12. a quick coupling; 12a, a female joint; 12b, a male connector, 13 and a third air inlet pipe; 14. a second solenoid valve; 15. a sampling container; 16. a connector assembly; 16a, a female terminal; 16b, a male end; 17. a third air outlet pipe; 18. a first intake pipe; 19. a bolt; 20. and (4) a bracket.

Detailed Description

In order to better understand the technical content of the utility model, specific embodiments are provided below, and the utility model is further described with reference to the accompanying drawings.

Referring to fig. 1 to 5, the utility model provides a radioactive gas sampling device with oxygen removal function, comprising a reaction box 2, a box cover 5 and a plurality of flow deflectors 3, wherein the top and the lower part of the reaction box 2 are respectively provided with a first air inlet pipe 18 and a first air outlet pipe 4, the box cover 5 is hermetically covered on the top of the reaction box 2, the flow deflectors 3 are convenient to replace after the oxyhydrogen catalyst is aged or invalid after the box cover 5 is opened, the flow deflectors 3 are arranged on the inner wall of the reaction box 2 in a staggered manner through a dismounting part, the outer surface of the flow deflectors 3 is provided with the oxyhydrogen catalyst, the oxyhydrogen catalyst is used for catalyzing hydrogen and oxygen to react to generate water, the flow deflectors 3 are respectively arranged in an inclined manner along the direction of liquid flow trend, the water generated by the oxyhydrogen reaction can flow away from the flow deflectors 3, so as to improve the activity of the oxyhydrogen catalyst, three adjacent surfaces of the flow deflectors 3 are attached to three adjacent inner surfaces of the reaction box 2, be provided with the clearance between the fourth plane of guide plate 3 and the fourth internal surface of reaction box 2 for radioactive gas flows to reaction box 2 top along the passageway that is formed by a plurality of "Z" shape end to end, the flow of air current has effectively been increased, hydrogen has been improved, the area of contact of oxygen and oxyhydrogen catalyst, and then improve oxyhydrogen catalytic effect, be provided with first solenoid valve 11 on the first intake pipe 18, control first solenoid valve 11 and close after the sample is accomplished, avoid the radioactive gas in the reaction box 2 to directly discharge into the atmosphere through first intake pipe 18, first intake pipe 18 is connected with the sampling subassembly, the radioactive gas of sampling subassembly exhaust discharges into reaction box 2 bottoms through first intake pipe 18.

Specifically, the disassembling part comprises a bracket 20 arranged on the inner wall of the reaction box 2, and the guide plate 33 is detachably arranged on the bracket 20 through a bolt 19, so that the guide plate is convenient to replace.

Specifically, the sampling assembly comprises an outer box 1 and a sampling container 15, a controller 7 and a switch 6 are arranged on the top of the outer box 1, a gas flowmeter 8 is arranged in the outer box 1, the gas flowmeter 8 adopts a glass rotameter, so that the flow can be visually observed in the sampling process, the convenience of sampling operation is improved, a second gas inlet pipe 9 and a second gas outlet pipe 10 are arranged on the gas flowmeter 8, a first electromagnetic valve 11 is arranged on the second gas outlet pipe 10, the controller 7 is respectively connected with the first electromagnetic valve 11 and the switch 6 through leads, the sampling container 15 is placed in the outer box 1, a third gas inlet pipe 13 and a third gas outlet pipe 17 are respectively arranged on two ends of the sampling container 15, the first gas inlet pipe 18 and the second gas outlet pipe 10 are respectively connected with the third gas outlet pipe 17 and the third gas inlet pipe 13 through a quick connector 12, the quick connector 12 comprises a male connector 12b and a female connector 12a which are matched with each other, the end parts of the first air inlet pipe 18 and the second air outlet pipe 10 are respectively provided with a male connector 12b, the end parts of the third air inlet pipe 13 and the third air outlet pipe 17 are respectively provided with a female connector 12a, the third air inlet pipe 13 and the third air outlet pipe 17 are respectively provided with a second electromagnetic valve 14, the second electromagnetic valve 14 is connected with the controller 7 through a connector 16, the connector 16 comprises a female end 16a and a male end 16b which are matched, the female end 16a is connected with the second electromagnetic valve 14 through a lead, the male end 16b is connected with the controller 7 through a lead, and the lead is a dotted line in fig. 1-3.

Specifically, 3 downward sloping settings of guide plate for the water that the oxyhydrogen reaction generated reduces the accumulation of 3 waters of guide plate along 3 flow direction reaction box 2 bottoms of guide plate, and is favorable to the collection of radioactive water.

Specifically, be provided with drainage valve on the 2 bottoms of reaction box, conveniently arrange the ponding in the discharge reaction box 2.

Specifically, the hydrogen-oxygen catalyst is a Pd/Pt-Al2O3 hydrophobic catalyst coating, and the water accumulation on the guide plate 3 is effectively reduced and the reaction effect of hydrogen and oxygen is improved by utilizing the hydrophobicity of the Pd/Pt-Al2O3 hydrophobic catalyst coating.

The working principle of the utility model is as follows:

when sampling, a sampling container 15 is placed in the outer box 1, because the two ends of the sampling container 15 are respectively provided with a third air inlet pipe 13 and a third air outlet pipe 17, the third air inlet pipe 13 and the third air outlet pipe 17 are both provided with a second electromagnetic valve 14, the controller 7 is connected with a male end 16b through a lead, the second electromagnetic valve 14 is also connected with a female end 16a through a lead, the male end 16b is inserted into the female end 16a to connect the controller 7 with the second electromagnetic valve 14, the male connectors 12b on the end parts of the first air inlet pipe 18 and the second air outlet pipe 10 are respectively inserted into the female connectors 12a on the end parts of the third air inlet pipe 13 and the third air outlet pipe 17 to connect the first air inlet pipe 18 and the third air outlet pipe 17 and connect the second air outlet pipe 10 and the third air inlet pipe 13, a tester presses the switch 6, the controller 7 receives a signal of the switch 6 and controls the first electromagnetic valve 11 and the second electromagnetic valve 14 to be opened, radioactive gas enters the gas flowmeter 8 through the second gas inlet pipe 9 and flows out through the second gas outlet pipe 10, a tester can more intuitively determine the flow rate of the gas flow by observing the display of the gas flowmeter 8, the radioactive gas flows into the sampling container 15 through the second gas outlet pipe 10, in order to extract a gas sample with detection significance, on the premise that the gas flowmeter 8 displays that the gas flows, the first electromagnetic valve 11 and the second electromagnetic valve 14 are kept open for 20 minutes so as to completely discharge the gas in the pipeline and the sampling container 15, and simultaneously, the extraction of a front section gas sample is avoided, after the radioactive gas discharged from the sampling device enters the reaction box 2, hydrogen and oxygen in the gas are in contact with a hydrogen-oxygen catalyst on the guide plate 3, and the hydrogen and the oxygen are subjected to chemical reaction to generate water under the catalytic action of the hydrogen-oxygen catalyst; in the process, under the action of the guide plate 3, the gas entering the reaction box 2 flows to the top of the reaction box 2 along a channel formed by connecting a plurality of Z-shaped end-to-end parts, so that the contact area of hydrogen, oxygen and the hydrogen-oxygen catalyst in the gas flow is increased, the hydrogen-oxygen reaction effect is improved, the hydrogen-oxygen content in the gas flow is reduced, the explosion risk after the radioactive gas enters the decay device is effectively reduced, and the operation safety is improved; meanwhile, the hydrophobic property of the Pd/Pt-Al2O3 hydrophobic catalyst coating and the inclined arrangement of the guide plate 3 are utilized, so that the accumulated water on the guide plate 3 is effectively reduced, and the activity of the hydrogen-oxygen catalyst is improved. After the sampling is finished, the switch 6 is pressed to enable the controller 7 to control the first electromagnetic valve 11 and the second electromagnetic valve 14 to be powered off, then the mechanical connection of the male end 16b and the female end 16a is disconnected, the mechanical connection of the male connector 12b and the female connector 12a is disconnected, and finally the sampling container 15 is taken out, so that semi-automatic operation is realized, the whole sampling operation is simple and convenient, and the safety is high.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a radioactive gas sampling device with deoxidization function which characterized in that: including reaction box, case lid and a plurality of guide plate, reaction box top and lower part are provided with first intake pipe and first outlet duct respectively, the sealed lid of case lid fits on the reaction box top, a plurality of the guide plate pass through the dismantlement part crisscross set up in on the reaction box inner wall, it is a plurality of the guide plate sets up along the direction slope of liquid flow trend respectively, the guide plate surface is provided with the oxyhydrogen catalyst, be provided with first solenoid valve in the first intake pipe, first intake pipe is connected with the sampling subassembly.

2. A radioactive gas sampling apparatus having an oxygen removing function according to claim 1, wherein: the disassembly part comprises a support arranged on the inner wall of the reaction box, and the guide plate is installed on the support through a bolt.

3. A radioactive gas sampling apparatus having an oxygen removing function according to claim 1, wherein: the sampling assembly comprises an outer box and a sampling container, a controller and a switch are arranged on the top of the outer box, a gas flowmeter is arranged in the outer box, a second gas inlet pipe and a second gas outlet pipe are arranged on the gas flowmeter, a first electromagnetic valve is arranged on the second gas outlet pipe, the controller is connected with the first electromagnetic valve and the switch respectively, the sampling container is placed in the outer box, a third gas inlet pipe and a third gas outlet pipe are arranged at two ends of the sampling container respectively, the first gas inlet pipe and the second gas outlet pipe are connected with the third gas outlet pipe and the third gas inlet pipe respectively through quick connectors, a second electromagnetic valve is arranged on the third gas outlet pipe and the third gas inlet pipe, and the second electromagnetic valve is connected with the controller through connectors.

4. A radioactive gas sampling apparatus having an oxygen removing function according to claim 1, wherein: the front end of the guide plate is arranged in a downward inclined mode.

5. A radioactive gas sampling apparatus having an oxygen removing function according to claim 1, wherein: and a water drainage valve is arranged at the bottom of the reaction box.

6. A radioactive gas sampling apparatus having an oxygen removing function according to claim 1, wherein: the hydrogen-oxygen catalyst is a Pd/Pt-Al2O3 hydrophobic catalyst coating.