CN-224231982-U - Organic tritium carbon oxidation burner

Abstract

The utility model discloses an organic tritium carbon oxidation combustion device, which relates to the technical field of radioactivity detection and comprises an oxidation furnace, a working tube, a condensing device and a recovery device, wherein a heating area is arranged in the oxidation furnace and is divided into a catalyst area, a sample area and a recovery area, the catalyst area, the sample area and the recovery area are sequentially arranged and are respectively heated by heating elements which are independently controlled, the working tube penetrates through the catalyst area, the sample area and the recovery area, gas channel inlet tubes are respectively connected to positions of the working tube corresponding to the catalyst area, the sample area and the recovery area, a one-way valve and a flow regulating valve are respectively arranged on each gas channel inlet tube, one end of the working tube close to the recovery area is provided with a gas channel outlet, the recovery device comprises a tritium collecting bottle and a carbon-14 collecting bottle which are sequentially connected, and the gas channel outlet is connected with the tritium collecting bottle and the carbon-14 collecting bottle are arranged in the condensing device. The utility model can make the sample oxidized more fully, improve the experimental accuracy and improve the product collection efficiency.

Inventors

• LIN FENG
• LIAO HUI
• LUO HONGKUN

Assignees

• 自然资源部第三海洋研究所
• 上海慧岚实业有限公司

Dates

Publication Date

20260512

Application Date

20250529

Claims (10)

1. 1. The organic tritium carbon oxidation combustion device is characterized by comprising an oxidation furnace, a working tube, a condensing device and a recovery device, wherein the oxidation furnace is internally provided with a heating zone, the heating zone is divided into a catalyst zone, a sample zone and a recovery zone through a partition plate arranged in the oxidation furnace, the catalyst zone, the sample zone and the recovery zone are sequentially arranged and are respectively heated through heating elements which are independently controlled, the working tube passes through the catalyst zone, the sample zone and the recovery zone, two ends of the working tube respectively extend out of the oxidation furnace, the working tube is in sealing connection with the oxidation furnace, the positions, corresponding to the catalyst zone, the sample zone and the recovery zone, on the working tube are respectively connected with a gas channel inlet tube, each gas channel inlet tube is provided with a one-way valve and a flow regulating valve, one end, close to the recovery zone, of the working tube is provided with a gas channel outlet, the recovery device comprises a tritium collecting bottle and a carbon-14 collecting bottle which are sequentially connected, and the tritium outlet is connected with the gas channel collecting bottle through a collecting tube and the gas channel collecting bottle and the carbon-14 collecting bottle.
2. 2. The device of claim 1, wherein the outer shell of the oxidizing furnace is made of vacuum-formed ceramic fiber heat-insulating material.
3. 3. The apparatus of claim 1, wherein the furnace has a double-layered housing.
4. 4. The organic tritium carbon oxidation combustion device of claim 3, wherein a cooling cavity is formed between an inner shell and an outer shell of the oxidation furnace, and the cooling cavity is connected with a cooling air inlet and a cooling air outlet.
5. 5. The apparatus of claim 1, wherein the oxidizing furnace has a door that can be opened and closed.
6. 6. The device of claim 1, wherein the working tube is a quartz tube.
7. 7. The organic tritium carbon oxidation combustion device as claimed in claim 6, wherein the inner diameter of the quartz tube is more than or equal to 60mm.
8. 8. The organic tritium carbon oxidation combustion device of claim 1, wherein the working tube is in sealing connection with the oxidation furnace through a flange structure.
9. 9. The organic tritium carbon oxidation combustion device of claim 1, wherein the collection pipeline is a silicone tube.
10. 10. The apparatus of claim 1, wherein the condensing unit comprises a condensing circulation tank, and the tritium collection bottle and the carbon-14 collection bottle are disposed in the condensing circulation tank.

Description

Organic tritium carbon oxidation burner Technical Field The utility model relates to the technical field of radioactivity detection, in particular to an organic tritium carbon oxidation combustion device. Background With the rapid development of the nuclear industry, more and more tritium is discharged into the environment, and the possible hazards they can pose by entering the organism through various cycles are absolutely not negligible. Tritium does not cause external irradiation damage to organisms, and most of tritium enters the organisms through inhalation, ingestion, skin and other ways and then irradiates internally in the organisms, so that biological effects are generated, the tritium enters the human body, the damage degree caused by the tritium is related to various factors, such as the content, the way, the chemical form and the like of tritium ingestion, a carbon-14 atomic nucleus consists of 6 protons and 8 neutrons, the decay mode is beta decay, the half life period is about 5730+/-40 years, and the tritium enters the human body through breathing or direct ingestion of polluted food, so that internal irradiation damage is caused. In the field of foods, tritium exists mainly in two forms of free water tritium and organically combined tritium, and carbon-14 exists mainly in the form of organically combined carbon. At present, a sample is generally placed in an oxidation furnace body for oxidation combustion, and the existing oxidation furnace has the following technical problems when carrying out sample combustion oxidation treatment: 1) The combustion efficiency is low, and the sample oxidation is incomplete due to uneven oxygen supply or insufficient temperature control precision of the traditional device, so that the combustion efficiency is lower than 95%. 2) And the gas backflow risk is that gaseous products generated in the combustion process can flow back to the air inlet system, pollute the air path and influence the experiment accuracy. 3) The collection efficiency is insufficient, HTO (tritiated water) and 14CO2 are less efficient to capture (typically < 90%) and cannot meet the high sensitivity analysis requirements. Disclosure of utility model The utility model aims to provide an organic tritium carbon oxidation combustion device, which solves the problems in the prior art, can oxidize a sample more fully, improves the experimental accuracy and improves the product collection efficiency. In order to achieve the above object, the present utility model provides the following solutions: The utility model provides an organic tritium carbon oxidation combustion device which comprises an oxidation furnace, a working tube, a condensing device and a recovery device, wherein a heating area is arranged in the oxidation furnace and is divided into a catalyst area, a sample area and a recovery area by a partition plate arranged in the oxidation furnace, the catalyst area, the sample area and the recovery area are sequentially arranged and are respectively heated by heating elements which are independently controlled, the working tube passes through the catalyst area, the sample area and the recovery area, two ends of the working tube respectively extend out of the oxidation furnace, the working tube is in sealing connection with the oxidation furnace, the positions, corresponding to the catalyst area, the sample area and the recovery area, of the working tube are respectively connected with a gas channel inlet tube, a one-way valve and a flow regulating valve are respectively arranged on each gas channel inlet tube, one end, close to the recovery area, of the working tube is provided with a gas channel outlet, the recovery device comprises a tritium collecting bottle and a carbon-14 collecting bottle, and the gas channel outlet is sequentially connected with the tritium collecting bottle through a collecting pipeline, and the carbon-14 collecting bottle is arranged in the carbon-collecting bottle. In one embodiment, the outer shell of the oxidation furnace is made of vacuum molding ceramic fiber heat-insulating materials. In one embodiment, the oxidizing furnace has a double shell. In one embodiment, a cooling cavity is formed between the inner and outer shells of the oxidation furnace, and the cooling cavity is connected with a cooling air inlet and a cooling air outlet. In one embodiment, the oxidizing furnace has a door that can be opened and closed. In one embodiment, the working tube is a quartz tube. In one embodiment, the quartz tube has an inner diameter of 60mm or more. In one embodiment, the working tube is sealingly connected to the oxidation oven by a flange structure. In one embodiment, the collection line is a silicone tube. In one embodiment, the condensing device comprises a condensing circulation tank, and the tritium collection bottle and the carbon-14 collection bottle are disposed within the condensing circulation tank. Compared with the prior art, the utility model has the