System to reduce concentrations of total organic carbon in a boric acid solution

摘要

The present invention aims to provide a device for reducing concentration of total organic carbon in boric acid solution. The device can reduce the concentration of total organic carbon (TOC) in cooling water containing boric acid in a nuclear reactor primary loop system by using UV radiation. The device comprises a liquid storage tank of input solution (containing total organic carbon and boric acid solution) and a pump, wherein the pump is used for pumping solution from the liquid storage tank to a UV lamp. A connecting pipe is arranged on a pipeline in front of the UV lamp for adding of a free radical reaction initiator, and the initiator is pumped by a metering pump. Mixed solution of the initiator and the boric acid solution flows into the UV lamp, and complicated organic matter is decomposed into simple matters in the UV lamp. After that, the solution flows into a activated carbon adsorption bed, so as to reduce the excess free radical reaction initiator. The solution in which the excess free radical reaction initiator is removed flows into an air discharge duct, so as to form oxygen and discharge carbon dioxide. Then the solution is pumped to a mixed bed column for thorough purification by a pump, and resin in the mixed bed column comprises a strong acidic cation exchanger and a strong base anion exchanger.