Non-contact gas delivery method and delivery device

Abstract

The application provides a non-contact gas conveying method and a conveying device, and belongs to the technical field of gas conveying. The conveying method is characterized in that: a clean gas is used to form an annular protective gas curtain which is attached to the inner wall of a gas conveying pipeline; and radioactive gas is conveyed inside the protective gas curtain. The protective gas curtain can prevent the radioactive gas from directly contacting the inner wall of the gas conveying pipeline, thereby reducing the pollution and corrosion of the gas conveying pipeline. When the gas conveying pipeline is decommissioned, complicated and tedious decontamination is not required, and secondary pollutants are not easily generated.

Description

Technical Field

[0001] This invention relates to the technical field of gas delivery, and more specifically to a non-contact gas delivery device. Background Technology

[0002] During operation, nuclear facilities (such as reprocessing plants) require ventilation systems to handle large amounts of radioactive gases to ensure their functionality. Conventional ventilation methods involve directly introducing radioactive gases into pipelines, which directly contact the inner walls of the pipelines, causing the entire pipeline to become contaminated. During pipeline decommissioning, high-pressure water or chemical immersion methods are required to decontaminate the pipelines to achieve a clean and decontamination level or reduce their waste grade before further processing. This process is not only cumbersome but also prone to generating secondary pollutants. Summary of the Invention

[0003] To address the problem of pipeline contamination during the current transportation of radioactive gases, this invention provides a non-contact gas transportation method and device.

[0004] On the one hand, the non-contact gas delivery method provided by the present invention is as follows:

[0005] A protective annular gas curtain is formed inside the gas pipeline using clean gas, and radioactive gas is transported inside the protective gas curtain.

[0006] On the other hand, the non-contact gas delivery device provided by the present invention includes: an annular airflow generator, a gas delivery pipe and connectors;

[0007] The annular airflow generator includes a generator body, which is connected to the end of the gas transmission pipeline via the connector;

[0008] The generator body is provided with an air inlet and an annular air outlet. The generator body is provided with a cavity that connects the air inlet and the annular air outlet. The annular air outlet faces the inside of the gas transmission pipeline. The air inlet is adapted to connect to a gas source so that the airflow passes through the annular air outlet to form an annular protective air curtain in the gas transmission pipeline.

[0009] Optionally, the generator body is an annular structure coaxial with the gas pipeline, the air inlet is located on the outer wall of the generator body, and the annular air outlet is located on the end face of the generator body.

[0010] Optionally, one or more air inlets may be provided and spaced apart on the generator body.

[0011] Optionally, multiple annular airflow generators and gas delivery pipes may be provided, and both ends of the generator body may be connected to the gas delivery pipes through the connectors, with the annular air outlets of all annular airflow generators facing the same direction.

[0012] Optionally, the connector is a flange structure, a welded structure, or a seam structure.

[0013] The technical solution of this invention has the following advantages:

[0014] 1. The non-contact gas delivery method provided by the present invention forms a protective gas curtain inside the gas delivery pipeline by using clean gas, and then delivers radioactive gas from the inside of the protective gas curtain. The protective gas curtain can prevent the radioactive gas from directly contacting the inner wall of the gas delivery pipeline, thereby reducing the pollution and corrosion of the gas delivery pipeline. When the gas delivery pipeline is decommissioned, there is no need to carry out complicated and tedious decontamination, and it is not easy to generate secondary pollutants.

[0015] 2. The non-contact gas delivery device provided by the present invention delivers clean gas into the annular airflow generator through the air inlet, and forms an annular airflow through the annular air outlet to enter the gas delivery pipeline, thereby forming an annular protective air curtain on the inside of the gas delivery pipeline to protect the gas delivery pipeline from contamination by the delivered radioactive gas. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a non-contact gas delivery device.

[0018] Figure 2 This is a schematic diagram of the structure of an annular airflow generator in a non-contact gas delivery device;

[0019] Figure 3 A schematic diagram of a ring-shaped airflow generator with multiple air inlets;

[0020] Figure 4 A schematic diagram showing the interconnection of multiple conveying units;

[0021] Explanation of reference numerals in the attached drawings: 1. Annular airflow generator; 11. Generator body; 12. Air inlet; 13. Annular air outlet; 2. Air delivery pipe; 3. Connecting parts. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] This embodiment provides a non-contact gas delivery method, which includes:

[0027] Clean gas is used to form an annular protective gas curtain inside the gas pipeline. The protective gas curtain is attached to the inner wall of the gas pipeline, and the flow direction of the annular protective gas curtain is consistent with the flow direction of the radioactive gas being transported. Radioactive gas is transported inside the protective gas curtain.

[0028] By employing the gas transport method described above, a protective air curtain can be used to prevent the transported gas from contacting the inner wall of the gas pipeline, thereby reducing or avoiding pollution and corrosion of the gas pipeline. Furthermore, the transported gas can be guided in the transport direction under the flow of the annular protective air curtain.

[0029] Based on the above-described non-contact gas delivery method, this embodiment also provides a non-contact gas delivery device, combined with... Figures 1 to 4As shown, the gas delivery device includes: a gas delivery pipeline 2, a connector 3, and an annular airflow generator 1. The annular airflow generator 1 is connected to one end of the gas delivery pipeline 2 through the connector 3, and can form an annular protective air curtain inside the gas delivery pipeline 2.

[0030] Specifically, the annular airflow generator 1 includes a generator body 11, which is connected to the gas transmission pipeline 2 via a connector 3. The generator body 11 is provided with an air inlet 12 and an annular air outlet 13, which are connected to each other. The annular air outlet 13 faces the inside of the gas transmission pipeline 2. The air inlet 12 is suitable for connection with a clean gas source, so that the clean gas can flow into the inside of the gas transmission pipeline 2 through the annular air outlet 13, thereby forming an annular protective air curtain inside the gas transmission pipeline 2.

[0031] The shape of the gas pipeline 2 is not limited. For example, the cross-section of the gas pipeline 2 is circular or rectangular. The shape of the annular outlet 13 is the same as that of the gas pipeline 2. The annular outlet 13 is positioned to fit against the inner wall of the gas pipeline 2, so that the protective gas curtain can flow against the inner wall surface of the gas pipeline 2, ensuring that there is sufficient space in the gas pipeline 2 to transport radioactive gas.

[0032] The generator body 11 can also be configured as an annular structure with the same shape as the gas pipeline 2, for example, combined with Figure 2 As shown, the generator body 11 has a ring-shaped structure. The air inlet 12 can be located on the outer wall of the generator body 11, and the annular air outlet 13 can be located at the end of the generator body 11. A cavity connecting the air inlet 12 and the annular air outlet 13 is formed inside the generator body 11. A channel for the flow of radioactive gas is also formed on the inner side of the annular generator body 11, facilitating the guidance of the radioactive gas into the gas delivery pipeline 2.

[0033] In some embodiments, such as Figure 3 As shown, multiple air inlets 12 can be provided. By simultaneously introducing clean gas into the generator body 11 through multiple air inlets 12, the uniformity of gas output from each part of the annular air outlet 13 can be ensured, thereby improving the protective effect of the protective air curtain.

[0034] Because the longer the flow distance of the protective air curtain, the worse its blocking effect on radioactive gases, the effective length range that the protective air curtain can cover is limited.

[0035] Therefore, as Figure 4As shown, in some embodiments, multiple gas delivery pipes 2 and multiple annular airflow generators 1 can be sequentially connected and combined. The length of the gas delivery pipe 2 is set based on the effective protection length of the protective air curtain. Both sides of the generator body 11 in the annular airflow generator 1 can be connected to the gas delivery pipe 2. That is, multiple sections of gas delivery pipe 2 are connected together by multiple annular airflow generators 1 to ensure that the protective air curtain in each section of gas delivery pipe 2 can effectively block radioactive gas. In addition, the protective air curtain in the previous gas delivery pipe 2 can also enter the inner side of the generator body 11 in the next set of delivery units to protect the inner wall of the generator body 11 and prevent radioactive gas from contacting the generator body 11.

[0036] In addition, the connecting component 3 mentioned above can be a flange structure, a welded structure, or a seam structure, as long as it can connect and fix the generator body 11 to the end of the gas pipeline 2 and ensure sealing. No specific restrictions are made in this embodiment.

[0037] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A non-contact gas conveying device, characterized in that, include: Circular airflow generator (1), gas transmission pipeline (2) and connecting parts (3); The annular airflow generator (1) includes a generator body (11), which is connected to the end of the gas transmission pipe (2) via the connector (3); The generator body (11) is provided with an air inlet (12) and an annular air outlet (13). The generator body (11) is provided with a cavity that connects the air inlet (12) and the annular air outlet (13). The annular air outlet (13) faces the inner side of the gas transmission pipe (2). The annular air outlet (13) is set on the end face of the generator body (11). All the annular air outlets (13) face the same direction. The air inlet (12) is suitable for connecting to a gas source, so that the airflow passes through the annular air outlet (13) to form an annular protective air curtain in the gas transmission pipe (2). Clean gas is used to form an annular protective air curtain that adheres to the inner wall of the gas transmission pipe. Radioactive gas is transported inside the protective air curtain.

2. The non-contact gas conveying device according to claim 1, characterized in that, The generator body (11) is an annular structure coaxial with the gas pipeline (2), and the air inlet (12) is located on the outer wall of the generator body (11).

3. The non-contact gas conveying device according to claim 2, characterized in that, The air inlet (12) has multiple inlets and is arranged at intervals on the generator body (11).

4. The non-contact gas conveying device according to claim 2, characterized in that, The annular airflow generator (1) and the gas delivery pipe (2) are multiple, and both ends of the generator body (11) are connected to the gas delivery pipe (2) through the connector (3).

5. The non-contact gas conveying device according to any one of claims 1-4, characterized in that, The connector (3) is a flange structure, a welded structure, or a seam structure.

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