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Method and device for preparing chlorine dioxide

A technology of chlorine dioxide and reactor, which is applied in the direction of chlorine oxide, etc., can solve problems such as unreachable work efficiency, complex system configuration, and increased energy demand, so as to achieve easy large-scale promotion and use, simplify system structure, and avoid energy waste Effect

Inactive Publication Date: 2011-07-27
深圳市康泰蓝水处理设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main defects of this method are: first, gas-liquid mixing and gas-liquid separation are mutually contradictory steps. From the perspective of the overall system composition, the higher the efficiency of the venturi tube and the gas-liquid separator, the more efficient the gas-liquid separator used in the entire system. Even if a baffle type gas-liquid separator with low separation efficiency is used for cost and anti-corrosion considerations, there is still a considerable part of the work loss in the gas-liquid mixing first and then the gas-liquid mixing. In the process of liquid separation; secondly, under normal circumstances, the negative pressure of the system is provided by the injector that injects chlorine dioxide into the water body, and various raw material pumps / valves that drive the raw material into the venturi tube The positive pressure not only does not contribute to the system pressure, but also requires the injector to provide additional negative pressure to offset it, so as to keep the system negative pressure within the rated range, which virtually increases the energy demand of the entire system; third, From the point of view of system structure, the system composition of feeding pipe / pump → Venturi tube gas-liquid mixer → gas-liquid separator → reactor is relatively complicated, and the working efficiency of each subsystem cannot reach or approach their respective optimum. Instead, we can only take the compromise value under the overall balance of the system

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  • Method and device for preparing chlorine dioxide
  • Method and device for preparing chlorine dioxide
  • Method and device for preparing chlorine dioxide

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preparation example Construction

[0052] When the equipment for preparing chlorine dioxide that realizes the high conversion rate of the present invention is working, at first two kinds of liquid raw materials are pumped into the respective feed pipes 44 and sodium chlorate mixed solution feed pipes 45 by respective raw material pumps 32. The water-bath heater 30 of the corresponding liquid raw material is heated to the required temperature; The check valve 34 is a back pressure valve. On the one hand, it can prevent backflow of the liquid raw material in unexpected situations; on the other hand, it can keep the pressure in the feeding pipe and the reactor 1 within the set range. After the liquid raw material enters the feeder 2, when it passes through the diffusion section 4-1 and the convergence section 4-2 in the 4 branches of the Y-shaped mixing feeding pipe, it is rapidly atomized under the action of pressure and becomes a gas-liquid mixed state. The two atomized liquid raw materials are mixed and reacted...

Embodiment 1

[0057] Embodiment 1: the solid sodium chlorate of 99% concentration and the hydrogen peroxide of 50% concentration are prepared as sodium chlorate mixed solution, the vitriol oil of 98% concentration is diluted with water to the dilute sulfuric acid of 75% concentration; By raw material pump 32 , in the present implementation is metering pump, according to molar ratio sulfuric acid: sodium chlorate: the ratio of hydrogen peroxide=1.9: 1.9: 0.9 feeds feed continuously to feeder 2, two kinds of solutions enter feeder 2 and pass through respective water bath heating The air heater 30 is heated to 56° C., and the air is also heated to 56° C. by the air heater 36 before entering the feeder 2 . Sulfuric acid, sodium chlorate mixed solution and hot air are mixed in the Y-shaped mixing feeding pipe 4 to form a mist gas-liquid mixture and start to react. After the initial reaction, the reaction solution enters the reactor 1 and undergoes multi-layer cyclone aeration reaction. After tes...

Embodiment 2

[0058] Embodiment 2: the solid sodium chlorate of 99% concentration and the hydrogen peroxide of 50% concentration are formulated as sodium chlorate mixed solution, the vitriol oil of 98% concentration is diluted with water to the dilute sulfuric acid of 70% concentration; By raw material pump 32 , be metering pump in this implementation, according to molar ratio sulfuric acid: sodium chlorate: hydrogen peroxide=2: 2: 1 feeds feed to feeder 2 continuously, two kinds of solutions pass through respective water bath warmer 30 before entering feeder 2 The air is heated to 60° C., and the air is also heated to 60° C. by the air heater 36 before entering the feeder 2 . Sulfuric acid, sodium chlorate mixed solution and hot air are mixed in the Y-shaped mixing feeding pipe 4 to form a mist gas-liquid mixture and start to react. After the initial reaction, the reaction solution enters the reactor 1 and undergoes multi-layer cyclone aeration reaction. After testing, the purity of chlori...

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Abstract

The invention discloses a method for preparing chlorine dioxide. The method comprises a material mixing step, a main reaction step and a finished product output step, wherein in the material mixing step, two liquid raw materials are respectively led into a charger through two material conveying pipes, and the raw materials are mixed by a Y-shaped mixing charging pipe in the charger to react primarily to form primary reaction mixed liquid which enters a reaction kettle; and in the main reaction step, the primary reaction mixed liquid falls onto a cyclone plate in the reaction kettle and forms cyclone, and passes through a multi-layer cyclone plate and a multi-layer aeration plate to form chlorine dioxide gas and reaction residual liquid. In addition, the invention also provides a device for preparing chlorine dioxide. The method and device for preparing chlorine dioxide disclosed by the invention have the advantages that a reaction system is more simplified, and the working efficiency of the system is higher.

Description

technical field [0001] The invention relates to a method and equipment for preparing chlorine dioxide, in particular to a method and equipment for preparing high-purity chlorine dioxide capable of realizing a high conversion rate. 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 trihalomethane, a carcinogen that is usually formed when disinfected with chlorine gas. Its safety is listed as AI level by the World Health Organization (WHO). It has many advantages such as long-term effect, bactericidal effect is not limited by pH value, etc., and the killing rate of some bacteria can reach 100%; the use of chlorine dioxide disinfection can also oxidize some reducing metal ions in water, such as Fe 2+ , Mn 2+ etc., can remove iron and manganese ...

Claims

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Application Information

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IPC IPC(8): C01B11/02
Inventor 黄保裕
Owner 深圳市康泰蓝水处理设备有限公司