High-concentration tritium water treatment device

Abstract

The invention discloses a high-concentration tritium water treatment device. The high-concentration tritium water treatment device comprises a water vapor generation unit, a membrane reaction unit, ahydrogen storage unit and a tail gas treatment unit which are connected in sequence. According to the invention, the first-stage reactor adopts a Pt catalyst loaded with variable valence oxides (TiO2,CeO2 and ZrO2) is adopted to change the isotope exchange reaction process of the anti-hydrogen water from the molecular level, so that the reaction rate is increased; and the second-stage reactor isfilled with a lithium-based CO2 adsorbent, a product is removed, and chemical equilibrium is further promoted to move rightwards. According to the method, the chemical reaction rate is increased, sidereactions are reduced, products are removed to promote chemical equilibrium movement, the tritium removal factor of the tritium water treatment process is increased, efficient recovery of tritium isachieved, and the device can be applied to fusion devices and other places where high-concentration tritium water is generated.

Description

technical field [0001] The invention belongs to the field of radioactive waste treatment, and in particular relates to a high-concentration tritium water treatment device. Background technique [0002] During the operation of the fusion device, a certain amount of high-concentration tritium water will be produced under certain normal operating conditions such as cleaning of the first wall, and under some abnormal conditions such as air leakage in the combustion chamber or tritium leakage in the glove box. Since high-concentration tritium water can undergo self-radiation decomposition, it will decompose to form explosive HT and O during storage. 2 Mixed gas, there is a risk of overpressure, and tritium water is generally converted into tritium gas for storage in a safe manner. One of the commonly used methods is to use a palladium membrane reactor to replace the tritium in the tritium water by chemical reaction, and selectively separate it through the palladium membrane to o...

AI Technical Summary

Problems solved by technology

However, when high-concentration tritium coexists with CO, a small amount of organic matter such as tritiated aldehyde or carboxylic acid will be produced. These by-products solidify tritium in the form of a solidified phase, which is not conducive to the recovery of tritium. However, there is no Experiments were carried out using high-concentration tritium water, thus ignoring the beta decay of tritium. When the concentration of tritium is high, the beta decay of tritium will trigger complex radiation reactions

In addition, the catalysts used in this kind of tritium water treatment process are generally conventional supports such as diatomaceous earth, Al 2 o 3 Supported Pt catalyst with low catalytic performance

In summary, the tritium removal factor of the hydrogen isotope exchange reaction is not high, and the treatment of high-concentration tritium water by the water-gas shift reaction will produce complex radiation side reactions, and the performance of the catalyst is low, so the current membrane reaction technology is not suitable for high-concentration tritium Efficient treatment of water

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