Continuous production device of composite chlorine dioxide and technology

Abstract

The invention belongs to the preparation and application fields of chlorine dioxide, and particularly relates to a continuous production device of composite chlorine dioxide and a technology. Multi-stage reaction is adopted in the method so as to make alkali metal chlorate and hydrochloric acid react sequentially in environments with different acidities and temperatures, and the raw material conversion rate and the purity of the chlorine dioxide are greatly increased; a purifier is adopted to greatly reduce chlorate and chlorite which enter water; the problems of gas-water mixed transportation and multi adding point distribution are solved via gas-liquid separation; and the absorption and the addition of a water injector are separated so as to ensure the stable running of the device.

Description

technical field [0001] The invention discloses a continuous production equipment and process of compound chlorine dioxide, which belongs to the field of preparation and application of chlorine dioxide. Background technique [0002] Chlorine dioxide, as a strong oxidizing agent, is well known in the field of disinfection. It is widely used in the field of disinfection of drinking water, hospital sewage, and swimming pool water. It is also used in the sterilization of circulating cooling water, urban Reuse of domestic sewage and reclaimed water, organic wastewater treatment, printing and dyeing decolorization, deodorization and other aspects. [0003] At present, the production methods and equipment for preparing chlorine dioxide by compound method generally have the following disadvantages: low conversion rate of raw materials, low purity and yield of chlorine dioxide; limited application places, back pressure at the dosing point, length of the dosing pipeline, It directly a...

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Problems solved by technology

[0003] At present, the production methods and equipment for preparing chlorine dioxide by compound method generally have the following disadvantages: low conversion rate of raw materials, low purity and yield of chlorine dioxide; limited application places, back pressure at the dosing point, length of the dosing pipeline, It directly affects the operation status of the hydraulic injector, and then affects the aeration rate, conversion rate, purity, and even the safe operation of the equipment.

[0005] Publication number is that the Chinese patent of CN100445198C discloses a kind of cascade chlorine dioxide generator, and cascade reactor is actually a two-stage reactor, and raw material all enters one level, but can not guarantee the gradient of reaction material; Adopt solid raw material feeding and liquid ( Sulfuric acid) feeding, the mixing cannot guarantee sufficient uniformity, and it is easy to form acid aggregation and cause hot spots, resulting in the decomposition of chlorine dioxide

[0006] The Chinese patent whose publication number is CN100424004C discloses a chlorine dioxide generator, wherein all raw materials are added from the first stage, and there is no follow-up supplement. Although there are six stages of superimposed reactions, the concentration, acidity, temperature, There is no difference in pressure, etc., it just prolongs the reaction time. From the perspective of chemical reaction parameters, it is actually a first-order reaction

And the generation of chlorine dioxide is highly correlated with the concentration of chlorate, acidity, temperature and pressure, and only prolonging the reaction time cannot solve the problem of improving the conversion rate of sodium chlorate and the yield of chlorine dioxide.

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