Method for preparing chlorine dioxide disinfectant

A technology of chlorine dioxide and disinfectant, which is applied in the direction of chlorine dioxide, oxidized chlorine, oxidized water/sewage treatment, etc., can solve the problems of drinking water chlorite and chlorate exceeding the standard, limit, impact, etc., and achieve chlorine The effects of salt reduction, conversion rate improvement, and dosage reduction

Pending Publication Date: 2018-08-24
四川蒙顶山化工有限公司
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, with the continuous development of the economy, the strengthening of environmental protection and the continuous strict control of hygiene indicators, it has been found that the use of chlorine dioxide disinfectant for disinfection can easily lead to excessive levels of chlorite and chlorate in drinking water. The national sanitation index cannot be reached, so many water plants no longer use it, including the disinfection of high-purity chlorine dioxide generators. Therefore, chlorine dioxide disinfectants are greatly restricted in the field of tap water. It has also been impacted by other disinfection products, which has affected the popularization and application of the internationally recognized chlorine dioxide disinfectant, and affected the development of some enterprises.
For domestic small and medium-sized waterworks, chlorine dioxide disinfectant is an ideal fungicide, so it also affects the selection and application of disinfectants in these waterworks, making disinfectants in a disadvantageous situation

Method used

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  • Method for preparing chlorine dioxide disinfectant
  • Method for preparing chlorine dioxide disinfectant
  • Method for preparing chlorine dioxide disinfectant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing a chlorine dioxide disinfectant, comprising the following steps: separately preparing a sodium chlorite solution and a hydrochloric acid solution, adding the two together to a dosing device for an activation reaction, and continuously aerating the high Pure, highly active chlorine dioxide gas, gas purity ≥ 99%, sent to drinking water applications;

[0028] Among them, the acidity of hydrochloric acid solution is 1.1-1.18mol / L, the concentration of sodium chlorite solution is 4-5%, the reaction volume ratio of sodium chlorite solution and hydrochloric acid solution is 1:1, and the temperature of activation reaction is 21-24 °C, the activation reaction time is 15-20 minutes.

Embodiment 2

[0030] Such as figure 1 Shown, sodium chlorite solution preparation device comprises sodium chlorite dissolving tank 12, circulating dissolving tank 11, circulating pump 10, settling tank 5, conveying pump 8 and finished product tank 6 connected successively; The outlet of circulating pump 10 is connected with The first branch and the second branch, the first branch is connected with the sedimentation tank 5, the second branch is connected with the upper entrance of the circulating dissolution tank 11, and two packing filters 4 are arranged in parallel on the second branch.

[0031] On sodium chlorite dissolving tank 12, be provided with solid sodium chlorite inlet 1 and first water inlet 2, be provided with stirring device 3 in sodium chlorite dissolving tank 12; The filling port 7 is provided with a sewage outlet 9 at the bottom of the sedimentation tank 5 .

[0032]The lower part of the sodium chlorite dissolving tank 12 is connected to the upper part of the circulating di...

Embodiment 3

[0035] The method adopting the device preparation chlorine dioxide disinfectant in embodiment 2 may further comprise the steps:

[0036] Preparation and production method of sodium chlorite solution:

[0037] (1) Dissolving of solid sodium chlorite: solid sodium chlorite and process water are poured in sodium chlorite dissolving tank 12 respectively, under the mechanical stirring effect of stirring device 3, fully dissolve;

[0038] (2) sodium chlorite solution deep dissolution: the sodium chlorite solution that dissolves is put into circulation dissolving tank 11, utilizes circulation pump 10, by two parallel packing filter 4, carries out the circulation depth dissolution of solution;

[0039] (3) sodium chlorite solution precipitation: the sodium chlorite solution that will thoroughly dissolve is squeezed into the settling tank 5 with circulation pump 10 to carry out precipitation;

[0040] (4) Sodium chlorite solution (chlorine dioxide disinfectant) filling: the sodium chl...

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Abstract

The invention discloses a method for preparing a chlorine dioxide disinfectant. The method comprises the following steps: preparing a sodium chlorite solution and a hydrochloric acid solution respectively; adding the two solutions into equipment and carrying out activation reaction; carrying out continuous aeration to generate high-purity and high-activity chlorine dioxide gas, wherein the purityof the gas is greater than or equal to 99 percent; conveying the chlorine dioxide gas to a drinking water application field. According to the method for preparing the chlorine dioxide disinfectant, disclosed by the invention, reasonable proportioning is carried out through a novel technological formula; the high-purity and high-activity chlorine dioxide gas can be prepared through activation operation.

Description

technical field [0001] The invention relates to the fields of chemical industry and environmental protection, in particular to a method for preparing a chlorine dioxide disinfectant. Background technique [0002] As a new generation of broad-spectrum powerful bactericidal disinfectant recognized internationally, chlorine dioxide has been widely used in the fields of drinking water disinfection, industrial circulating water and various wastewater treatment in society. Due to the rapid sterilization of chlorine dioxide, strong oxidizing ability, good effect, no residue and no side effects, it has also been recognized by more and more people under the current situation that the country and governments at all levels attach great importance to environmental protection. The most ideal cleaning and disinfecting agent. [0003] Chlorine dioxide preparation technology has a history of nearly 30 years in China. At first, generators were used to prepare chlorine dioxide in China. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B11/02C02F1/76
CPCC01B11/024C02F1/76
Inventor 陈祥衡张小康高凯高勇叶姣张亚飞
Owner 四川蒙顶山化工有限公司
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