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High-conversion ratio method and equipment for producing chlorine dioxide

A chlorine dioxide, high conversion technology, applied in the direction of chlorine oxide and other directions, can solve the problems of increasing the disinfection cost of tap water, the ratio of raw materials deviates from the theoretical value, and the conversion rate of chlorine dioxide is low, so as to reduce the cost of human resources and management, The effect of reducing raw material consumption and high conversion rate

Inactive Publication Date: 2009-05-13
邱密雄 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In practical applications, the main disadvantage of using the hydrochloric acid method (R5 method) to prepare chlorine dioxide is that the reaction gas is a mixed gas of chlorine dioxide and chlorine gas, and the conversion rate of chlorine dioxide is low; the preparation of chlorine dioxide by the chlorite method Chlorine oxide greatly increases the cost of tap water disinfection due to the high price of raw materials
Chinese Invention Patent Application Publication CN1803581 discloses a method and equipment for preparing high-purity chlorine dioxide. In this method, sulfuric acid: sodium chlorate: hydrogen peroxide: 3.8-4.3: 1.5-1.75: 0.8-1.2, which The raw material ratio of this method deviates greatly from the theoretical value, so the raw material consumption is high

Method used

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  • High-conversion ratio method and equipment for producing chlorine dioxide
  • High-conversion ratio method and equipment for producing chlorine dioxide
  • High-conversion ratio method and equipment for producing chlorine dioxide

Examples

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Effect test

Embodiment 1

[0049] Embodiment 1, the solid sodium chlorate of 99% concentration and the hydrogen peroxide of 50% concentration are formulated as sodium chlorate mixed solution and put into sodium chlorate metering tank, the concentrated sulfuric acid of 98% concentration is diluted with water to 75% concentration Dilute sulfuric acid is loaded into the sulfuric acid metering tank; the metering pump is used to feed continuously to the Venturi mixer according to the molar ratio of sulfuric acid: sodium chlorate: hydrogen peroxide = 1.9:1.9:0.9, and the two solutions are heated to 56°C before entering the mixer. The air is heated to 56°C before entering the mixer. Sulfuric acid, sodium chlorate mixture and air are mixed into a mist gas-liquid mixture in the Venturi mixer, and then enter the gas-liquid separator for gas-liquid separation, and the separated reaction liquid enters the reactor for multi-layer cyclone aeration reaction. After testing, the purity of chlorine dioxide gas is 95%, a...

Embodiment 2

[0050] Embodiment 2, the solid sodium chlorate of 99% concentration and the hydrogen peroxide of 50% concentration are formulated as sodium chlorate mixed solution and put into sodium chlorate metering tank, the concentrated sulfuric acid of 98% concentration is diluted with water to 70% concentration Dilute sulfuric acid is loaded into the sulfuric acid metering tank; the metering pump continuously feeds the material to the Venturi mixer according to the molar ratio of sulfuric acid: sodium chlorate: hydrogen peroxide = 2:2:1, and the two solutions are heated to 60°C before entering the mixer. The air is heated to 60°C before entering the mixer. Sulfuric acid, sodium chlorate mixture and air are mixed into a mist gas-liquid mixture in the Venturi mixer, and then enter the gas-liquid separator for gas-liquid separation, and the separated reaction liquid enters the reactor for multi-layer cyclone aeration reaction. After testing, the purity of chlorine dioxide gas is 95%, and ...

Embodiment 3

[0051] Embodiment 3, the solid sodium chlorate of 99% concentration and the hydrogen peroxide of 50% concentration are prepared as sodium chlorate mixed solution and put into sodium chlorate metering tank, the concentrated sulfuric acid of 98% concentration is diluted with water to be 70% concentration Dilute sulfuric acid is loaded into the sulfuric acid metering tank; the metering pump continuously feeds the material to the Venturi mixer according to the molar ratio of sulfuric acid: sodium chlorate: hydrogen peroxide = 2.1: 2.1: 1.1, and the two solutions are heated to 64°C before entering the mixer. The air is heated to 64°C before entering the mixer. Sulfuric acid, sodium chlorate mixture and air are mixed into a mist gas-liquid mixture in the Venturi mixer, and then enter the gas-liquid separator for gas-liquid separation, and the separated reaction liquid enters the reactor for multi-layer cyclone aeration reaction. After testing, the purity of chlorine dioxide gas is ...

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Abstract

The invention discloses a method and equipment for preparing high-purity chlorine dioxide at high conversion rate, accurately controlling chlorine dioxide adding amount, and greatly enhancing the reliability of system operation at the same time. The invention aims to solve the main technical problems that the conversion rate and the purity of the chlorine dioxide are improved, the chlorine dioxide adding is accurately and dynamically controlled, and the reliability and the safety of the system operation are enhanced. In the invention, sulphuric acid, sodium chlorate and a hydrogen peroxide solution are heated, and are subject to gas-liquid separation after being mixed through a Venturi mixer; the adding amount and the adding proportion of a prepared chlorine dioxide gas are accurately controlled by an intelligent environmental adaptation system for multipoint adding, so as to ensure the water quality reaches the standard. The chlorine dioxide preparing and adding equipment of the invention can carry out remote real-time centralized control and management, so that the reliability and the safety of the system operation are greatly enhanced. The invention has the advantages of high conversion rate of preparing the chlorine dioxide, high purity, low disinfection cost, as well as safe and reliable system operation, thereby facilitating centralized management and large-scale promotion.

Description

technical field [0001] The invention relates to a method and equipment for preparing and adding disinfectant for drinking water, in particular to a method and equipment for preparing high-purity chlorine dioxide with high conversion rate and precisely controlling the dosage of chlorine dioxide. Background technique [0002] In the past thirty years, chlorine dioxide, as a new type of disinfection oxidant, has been widely used in developed countries, and it is an excellent disinfection oxidant to replace liquid chlorine. The water treated with chlorine dioxide will not produce the carcinogen trihalomethanes that are usually formed when chlorine gas is used for disinfection. Its safety is listed as AI level by the World Health Organization (WHO). , long drug effect, bactericidal effect is not limited by PH value and many other advantages, the killing rate of some bacteria can reach 100%; the use of chlorine dioxide disinfection can also oxidize some reducing metal ions in wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B11/02
Inventor 邱密雄易峰
Owner 邱密雄
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