An inner loop reactor for water detritiation and its realization method

Abstract

The invention discloses an internal circulation reactor for tritium removal of water. The internal circulation reactor comprises a top cover, an outer cylinder, a central area air inlet pipe, an annular gap area air inlet pope, a sintering plate, a flow guide cylinder, theta-ring filler, a tritium-containing water inlet pipe, a tritium-containing hydrogen exhaust pipe, an annular pipe type distributor and a low-tritium water outlet pipe. The top cover is arranged on the top of the outer cylinder, the annular pipe type distributor is located inside the outer cylinder, the tritium-containing water inlet pipe and the tritium-containing hydrogen exhaust pipe are both communicated with the outer cylinder, and the tritium-containing water inlet pipe is connected with the annular pipe type distributor. The bottom space in the outer cylinder is divided into a central area and an annular gap area by the glow guide cylinder, wherein the central area is communicated with the flow guide cylinder, and the annular gap area is communicated with the bottom of the outer cylinder. The sintering plate is fixed inside the outer cylinder. The central area and the annular gap area are filled with the theta-ring filler. The low-tritium water outlet pipe is communicated with the annular gap area. The internal circulation reactor has the advantages of being large in gas-liquid phase contact area and high in reaction efficiency, and tritium-containing water can flow in a fixed direction; meanwhile, the standing time of the liquid phase can be controlled, and thus the content of gas-phase tritium and the content of liquid-phase tritium after a reaction can be quickly and accurately controlled.

Description

technical field [0001] The invention relates to the fields of chemical industry and nuclear technology and equipment, in particular to an inner loop reactor for water detritiation and a realization method thereof. Background technique [0002] Tritium is a radioactive isotope of hydrogen that is vital in both military and nuclear power. The manufacture of nuclear weapons and the operation of fusion reactors will involve the operation of a large amount of tritium, and some tritium will eventually exist in the form of tritiated water; the operation of nuclear power plants will also produce a large amount of tritium-containing wastewater. If the tritium-containing wastewater is not properly treated, it will cause serious environmental pollution. At the same time, tritium is an extremely trace element in nature and has a very high value. The recovery of tritium in tritium-containing water has high economic value. Therefore, the development of high-efficiency, energy-saving, en...

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Problems solved by technology

[0003] Liquid-phase catalytic exchange (LPCE) technology is a relatively mature water detritization technology at present. It uses multi-section catalytic exchange columns in series to achieve higher reaction efficiency and throughput. However, the disadvantages of this technology are that the equipment is complex and installation The height is high and the processing cost is high; the Pt-based catalyst used is expensive, and the amount of catalyst filled in the multi-section series-connected exchange column is large, and the cost is high; at the same time, the residence time of the gas-liquid phase in the exchange column is difficult to control, and the reaction cannot be quantitatively and accurately controlled Tritium content of post-low tritium water and tritium-containing hydrogen

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