Process for producing chlorine dioxide used for treating water

Abstract

The invention relates to a method for preparing chlorine dioxide which is used for treating water, in particular to a method for preparing the chlorine dioxide used for treating the water from stable activating preparation of the chlorine dioxide. Sodium carbonate is adopted as a stabilizer to prepare stable chlorine dioxide solution, and hydrochloric acid is used as activation solution of an activator to actively prepare the chlorine dioxide. The invention is characterized in that: the weight concentration of the hydrochloric acid in the activation solution is 10 percent-20 percent and the mass putting ratio between the chlorine dioxide activation solution and the stable solution is 1: 3-1: 1. The method of the invention adopts stable chorine dioxide activation equipment with finalized production and gropes and selects suitable activation concentration and use ratio; the activation efficiency can be improved above 85 percent; the invention can effectively reduce the cost of water treatment and improve water quality of the water treatment.

Description

technical field [0001] The invention relates to a method for preparing chlorine dioxide for water treatment, in particular to a method for preparing chlorine dioxide for water treatment from stable chlorine dioxide activation. Background technique: [0002] Chlorine dioxide is an effective disinfectant in the water treatment industry. Chlorine dioxide exists in molecular form in aqueous solution, which is conducive to diffusion in water. Chlorine dioxide has the advantages of no hydrolysis in water, good disinfection effect, and no formation of organic halogenated substances such as chloroform when disinfecting drinking water, so it is adopted by more and more drinking water plants. [0003] Because chlorine dioxide has the risk of explosion, there are two ways to use chlorine dioxide: one is to prepare and use it now, and it cannot be stored in large quantities. Another method is called the stabilized chlorine dioxide method. The principle of stable chlorine dioxide is t...

AI Technical Summary

Problems solved by technology

[0004] At present, in the process of using activation equipment and chlorine dioxide stabilizing solution to prepare chlorine dioxide for water treatment, the concentration of the activating agent of the used activating solution is about 8%, and the mass input ratio of chlorine dioxide activating solution and stabilizing solution is 1 : 5, the effect of carrying out water treatment is not ideal, the activation efficiency of chlorine dichloride is low, and the general activation efficiency only reaches 40%~50%, causes part chlorine dioxide not to be activated, causes waste, and not activated part chlorine dioxide May impact long-term users

Due to the high price of stable chlorine dioxide, the cost of water treatment due to the low activation efficiency of the existing technology is extremely high, which affects the operation of the industrialized water disinfection system of stable chlorine dioxide, and the application effect is not good.