Activated carbon column structure for Kr-85 gas collection

Abstract

The utility model relates to the technical field of nuclear power station waste gas treatment, in particular to an activated carbon column structure for Kr-85 gas collection, which comprises a stainless steel bottle body, a gas inlet pipe and a filter, the stainless steel bottle body is of a bottle type structure, the filter is fixedly connected with the stainless steel bottle body and located in the stainless steel bottle body, the interior of the stainless steel bottle body is divided into an upper space and a lower space by the filter, the upper space is filled with activated carbon, and the air inlet pipe extends into the stainless steel bottle body and is communicated with the lower space. The appearance size of the bottle type structure with the same volume is much smaller than that of an activated carbon column with a U-shaped pipe structure, the appearance size of the bottle type structure is only about 50% of that of the U-shaped pipe structure, and gas enters the lower portion of the stainless steel bottle body through the gas inlet pipe on the top and then enters the activated carbon column through the filter to be adsorbed. And the overall appearance miniaturization and low energy consumption of the device are realized.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power plant exhaust gas treatment technology, and in particular to an activated carbon column structure for Kr-85 gas collection. Background Technology

[0002] During the operation of a nuclear power plant, waste gas containing radioactive inert gases is generated, primarily isotopes of krypton (Kr) and xenon (Xe). These gases mainly originate from the fission reaction of nuclear fuel and are released into the waste gas system when the fuel cladding breaks or a nuclear fuel leak occurs. Although inert gases are chemically stable, their radioactivity can affect human health through inhalation or external exposure, especially at high concentrations, requiring strict monitoring. During normal operation of a nuclear power plant, the amount of radioactive inert gases krypton (Kr) and xenon (Xe) is usually very small. Therefore, to meet the requirements of the detection device for the enrichment, separation, collection, and detection of Kr-85 gas, a large amount of waste gas needs to be collected. This necessitates that the activated carbon column in the first enrichment and separation unit of the detection device has a sufficiently large volume to adsorb all the collected gas. Otherwise, if the activated carbon column reaches saturation, the detection results will be distorted, thus affecting the detection of krypton-85 (Kr-85). 85 The calculation of Kr concentration poses a safety risk to nuclear power plants.

[0003] In existing Kr-85 gas detection devices, the activated carbon column in the first enrichment and separation unit is usually designed as a "U"-shaped tube structure. This structure has a large external size, resulting in a very large external size for both the first enrichment and separation unit and the final Kr-85 gas detection device, as well as high energy consumption during operation.

[0004] Therefore, how to make nuclear power plants use krypton-85 ( 85 Miniaturization and low energy consumption of Kr gas concentration detection devices are urgent problems to be solved in this field. Utility Model Content

[0005] The purpose of this invention is to provide an activated carbon column structure for Kr-85 gas collection, which solves the problems of large volume and high energy consumption of activated carbon columns in the prior art.

[0006] To achieve the above objectives, this utility model provides an activated carbon column structure for Kr-85 gas collection, including a stainless steel bottle, an inlet pipe, and a filter;

[0007] The stainless steel bottle has a bottle-shaped structure. The filter is fixedly connected to the stainless steel bottle and located inside the stainless steel bottle, dividing the interior of the stainless steel bottle into an upper space and a lower space. Activated carbon is filled in the upper space. The air inlet pipe extends into the interior of the stainless steel bottle and communicates with the lower space.

[0008] The Kr-85 gas collecting active carbon column structure further comprises a gas outlet pipe fixedly connected with the stainless steel bottle body and in communication with the inside of the stainless steel bottle body and located above the stainless steel bottle body.

[0009] The Kr-85 gas collecting active carbon column structure further comprises a heater detachably connected with the stainless steel bottle body and located at the outer periphery of the stainless steel bottle body.

[0010] The Kr-85 gas collecting active carbon column structure further comprises a temperature sensor connected with the stainless steel bottle body and extending into the upper space.

[0011] The Kr-85 gas collecting active carbon column structure further comprises a mounting seat fixedly connected with the stainless steel bottle body and located above the stainless steel bottle body.

[0012] The Kr-85 gas collecting active carbon column structure of the utility model has the advantages of small overall size and low energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced.

[0014] Figure 1 is the overall structure schematic view of the Kr-85 gas collecting active carbon column structure of the first embodiment of the utility model.

[0015] Figure 2 is the cross-sectional structure schematic view of the Kr-85 gas collecting active carbon column structure of the first embodiment of the utility model.

[0016] In the figure: 101-stainless steel bottle body, 102-gas inlet pipe, 103-filter, 104-gas outlet pipe, 105-heater, 106-temperature sensor, 107-mounting seat. DETAILED DESCRIPTION

[0017] The embodiments of the utility model will be described in detail below, the examples of the embodiments are shown in the drawings, the embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model and cannot be understood as the limitation of the utility model.

[0018] The first embodiment of the present application is:

[0019] Please refer to Figure 1 and Figure 2 , wherein, Figure 1 is the overall structure diagram of the Kr-85 gas collection activated carbon column structure of the first embodiment of the present application. Figure 2 is the cross-sectional structure diagram of the Kr-85 gas collection activated carbon column structure of the first embodiment of the present application.

[0020] The present application provides a kind of Kr-85 gas collection activated carbon column structure: including stainless steel bottle body 101, inlet pipe 102, filter 103, outlet pipe 104, heater 105, temperature sensor 106 and mounting seat 107.

[0021] For the specific embodiment, the stainless steel bottle body 101 is a bottle structure, the filter 103 is fixedly connected with the stainless steel bottle body 101, and is located in the inside of the stainless steel bottle body 101, and the inside of the stainless steel bottle body 101 is isolated into upper space and lower space, the upper space is filled with activated carbon, the inlet pipe 102 extends into the inside of the stainless steel bottle body 101, and is communicated with the lower space.The structure of the stainless steel bottle body 101 is "bottle structure", and the outer shape size of the "bottle structure" with the same volume is much smaller than that of the "U" type pipe structure, and the outer shape size of the "bottle structure" is only about 50% of that of the "U" type pipe structure, the filter 103 is in the stainless steel bottle body 101, the inside space of the stainless steel bottle body 101 is isolated into upper space and lower space, the upper space is filled with activated carbon, and the gas enters the lower space of the stainless steel bottle body 101 through the inlet pipe 102 at the top, and then enters the activated carbon column through the filter 103 and is adsorbed.

[0022] Among them, the outlet pipe 104 is fixedly connected with the stainless steel bottle body 101, and is communicated with the inside of the stainless steel bottle body 101, and is located above the stainless steel bottle body 101.When gas is desorbed, it is discharged through the outlet pipe 104 above the stainless steel bottle body 101, and a filtering device is arranged at the gas outlet of the outlet pipe 104 to prevent activated carbon from being taken out by the gas.

[0023] Secondly, the heater 105 is detachably connected with the stainless steel bottle body 101, and is located at the outer periphery of the stainless steel bottle body 101.The heater 105 is installed on the outer periphery of the stainless steel bottle body 101, and the temperature sensor 106 is installed near the heater 105 and in the activated carbon in the bottle respectively, for temperature control of the activated carbon column.

[0024] Meanwhile, the temperature sensor 106 is connected with the stainless steel bottle body 101 and extends into the upper space. The temperature sensor 106 is installed in the upper space of the stainless steel bottle body 101 for temperature control of the activated carbon column.

[0025] In addition, the mounting seat 107 is fixedly connected with the stainless steel bottle body 101 and located above the stainless steel bottle body 101. The mounting seat 107 is used for mounting the temperature sensor 106 and the stainless steel bottle body 101, facilitating application of the stainless steel bottle body 101 to other devices.

[0026] The Kr-85 gas collection activated carbon column structure of the embodiment is used. The gas enters the lower part of the stainless steel bottle body 101 through the gas inlet pipe 102 at the top, and then passes through the filter 103 to be adsorbed by the activated carbon column. When the gas is desorbed, it is discharged through the gas outlet pipe 104 above the stainless steel bottle body 101. The filter device at the gas outlet can prevent the activated carbon from being carried out by the gas. The heater 105 around the outer periphery of the stainless steel bottle body 101 and the temperature sensor 106 in the activated carbon in the bottle jointly realize temperature control of the activated carbon column, thereby ensuring efficient adsorption and desorption of the gas. The structure of the stainless steel bottle body 101 is a "bottle structure". The "bottle structure" has much smaller outer dimensions than the activated carbon column of the "U" type pipe structure of the same volume. The outer dimensions of the "bottle structure" are only about 50% of the "U" type pipe structure, realizing miniaturization of the overall appearance of the device and low energy consumption.

[0027] The above only discloses one or more preferred embodiments of the application, and cannot limit the scope of the application. Those skilled in the art can understand that the above-mentioned embodiments can be implemented in whole or in part, and equivalent changes made according to the claims of the application still fall within the scope of the application.

Claims

1. An activated carbon column structure for Kr-85 gas collection, characterized in that, Includes a stainless steel bottle body, air inlet pipe, and filter; The stainless steel bottle has a bottle-shaped structure. The filter is fixedly connected to the stainless steel bottle and located inside the stainless steel bottle, dividing the interior of the stainless steel bottle into an upper space and a lower space. Activated carbon is filled in the upper space. The air inlet pipe extends into the interior of the stainless steel bottle and communicates with the lower space.

2. The activated carbon column structure for Kr-85 gas collection as described in claim 1, characterized in that, The Kr-85 gas collection activated carbon column structure also includes an outlet pipe, which is fixedly connected to the stainless steel bottle body and communicates with the interior of the stainless steel bottle body, and is located above the stainless steel bottle body.

3. The activated carbon column structure for Kr-85 gas collection as described in claim 1, characterized in that, The Kr-85 gas collection activated carbon column structure also includes a heater, which is detachably connected to the stainless steel bottle and located on the outer periphery of the stainless steel bottle.

4. The activated carbon column structure for Kr-85 gas collection as described in claim 1, characterized in that, The Kr-85 gas collection activated carbon column structure also includes a temperature sensor, which is connected to the stainless steel bottle and extends into the upper space.

5. The activated carbon column structure for Kr-85 gas collection as described in claim 1, characterized in that, The Kr-85 gas collection activated carbon column structure also includes a mounting base, which is fixedly connected to the stainless steel bottle and located above the stainless steel bottle.

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