Liquid-state heavy metal oxygen concentration control solid-liquid exchange reaction apparatus under flowing working condition

Abstract

The present invention discloses a liquid-state heavy metal oxygen concentration control solid-liquid exchange reaction apparatus under the flowing working condition, wherein the oxygen concentration in the whole liquid-state heavy metal system is adjusted by controlling the temperature and the flow rate of the liquid-state heavy metal flowing through a reaction container. With the apparatus of the present invention, the problems of the reaction container temperature control, no damage of the mass exchanger on the whole reaction container and the like are cleverly solved. The apparatus comprises a mass exchanger, an oxygen measurement meter, a built-in heating rod, a built-in thermocouple, an air cooling device, a filtration screen type filter, a liquid-state metal valve, a liquid-state metal flow meter, and a reaction container. According to the present invention, the temperature of the liquid-state heavy metal is stable and controllable; the electronically controlled liquid-state metal valve and the liquid-state metal flow meter are adopted to precisely control the flow rate of the liquid-state metal in the reaction container; the filtration screen type filter is arranged, the impurity in the liquid-state heavy metal can be filtered out, and the influence of entering of the impurity into the mass exchanger and adsorbing on the surface of oxygen source particles on the oxygen source particle oxygen exchange efficiency can be prevented; and the flange type or ferrule type connection is adopted so as to provide characteristics of easy removal, easy replacement and easy maintenance.

Description

technical field [0001] The invention is applicable to the fields of new nuclear industry and nuclear technology, and is mainly applied to the on-line control of the oxygen content of the liquid metal coolant in accelerator-driven subcritical reactors (ADS) and advanced reactors. Background technique [0002] Liquid lead bismuth alloy LBE (Lead bismuth eutectic) is the preferred material for spallation targets in accelerator-driven subcritical systems (ADS) and an important candidate material for coolants in advanced fast reactors. Due to the special thermophysical and chemical properties of liquid lead-bismuth, such as low melting point (123.5°C), high boiling point (1670°C), high thermal conductivity, low vapor pressure and no violent reaction with air and water, liquid lead-bismuth is currently As a coolant for ADS spallation targets and advanced fast reactors, it has been extensively studied worldwide. [0003] However, its corrosiveness to steel has become the biggest c...

AI Technical Summary

Problems solved by technology

The technical difficulty of realizing solid-phase oxygen control under the flow condition of lead and bismuth lies in the precise control of the temperature and flow rate of lead and bismuth flowing through the mass exchanger during the dissolution and deposition of PbO particles and the anti-poisoning of PbO particles (corrosion impurities are deposited on the surface of PbO particles , PbO particle dissolution and deposition function will be invalid)

Images