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Graded chlorine dioxide generator

A chlorine dioxide and generator technology, applied in the direction of chlorine oxidation, etc., can solve problems such as unfavorable operation and labor liberation, low purity of chlorine dioxide gas, and no safety protection device, etc., so as to reduce the amount of waste liquid generated and improve Raw material conversion rate and effect of reducing sulfuric acid usage

Active Publication Date: 2008-12-24
NJTECH ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this method is that the raw material sodium chlorate is cheap and easy to get, and the disadvantage is that the purity of the chlorine dioxide gas generated at one time is low, and it needs to be purified before it can be used.
Existing technology 200510094054.X, the name of the invention is chlorine dioxide generator, which uses hydrogen peroxide to reduce sodium chlorate solution in sulfuric acid solution to produce chlorine dioxide, which overcomes the shortcomings of the first two patented technologies that produce impure gas , but there are still areas to be improved: ① Only sodium chlorate solution can be used for feeding, and the amount of sulfuric acid used is relatively large, generally 3.8-12.6molH 2 SO 4 / molClO 2 , a large amount of waste acid is produced
② The conversion rate of raw materials is not very high, and the conversion rate of raw materials is more than 85% when the reaction time is 1h
③ The automatic control system is not considered, which is not conducive to the operation and labor liberation; the safety protection device is not installed, which is not conducive to the safety of the generator

Method used

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  • Graded chlorine dioxide generator
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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 30% hydrogen peroxide, 65% sulfuric acid solution and solid sodium chlorate are added respectively to hydrogen peroxide solution storage tank 21, sulfuric acid solution storage tank 21 and feeder hopper 1-4; Open water jet vacuum pump 16, Make the reaction system reach the predetermined negative pressure -0.01MPa; open the air flow meter 2, and feed air at a certain rate (≥10 times the theoretical production of chlorine dioxide); open the heating system 11, and maintain the reaction temperature of the heating reactor at 55°C; Feed automatic controller 19 controls to open metering pump 22 and solid screw feed system 1 feed, feed speed is controlled at: (V H2SO4溶液 / ml): (V H2O2溶液 / ml): (m NaClO3 / g)=2.5:0.7:1, the chlorine dioxide gas that produces is drawn out by water-jet vacuum pump 16 and dissolves in water or absorbing liquid for subsequent use or sells outside.

[0028] Now the sodium chlorate conversion rate is 93%, the chlorine dioxide gas purity is greater than...

Embodiment 2

[0031] 45% hydrogen peroxide, 75% sulfuric acid solution and solid sodium chlorate are added respectively to hydrogen peroxide solution storage tank 21, sulfuric acid solution storage tank 21 and feeder hopper 1-4; Open water jet vacuum pump 16, Make the reaction system reach the predetermined negative pressure -0.03MPa; turn on the air flow meter 2, and feed air at a certain rate (≥10 times the theoretical production of chlorine dioxide); turn on the heating system 11, and maintain the reaction temperature of the heating reactor at 65°C; Feed automatic controller 19 controls to open metering pump 22 and solid screw feed system 1 feed, feed speed is controlled at: (V H2SO4溶液 / ml): (V H2O2溶液 / ml): (m NaClO3 / g)=1.6:0.4:1, the chlorine dioxide gas that produces is drawn out by water-jet vacuum pump 16 and dissolves in water or absorbing liquid for subsequent use or sells outside.

[0032] Now the sodium chlorate conversion rate is 98%, the chlorine dioxide gas purity is greate...

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Abstract

The invention belongs to the field of environmental protection equipment. Specifically, it is an environmentally friendly chlorine dioxide generator that adopts special preparation technology, special structure, low cost, high conversion rate of raw materials and high purity of product. It is characterized in that it is equipped with a normal temperature reaction kettle and a heating reaction kettle. Concentration and temperature gradients are formed between each reaction kettle. The reaction is smoother and safer, and the raw material conversion rate is greatly improved. The sodium chlorate is metered and fed in solid form, which is very convenient. It greatly reduces the use of sulfuric acid, thereby reducing the amount of acidic waste liquid produced, and is more environmentally friendly; a pressure detector and a safety valve are installed on the discharge pipe, which are used in conjunction with the feed automatic controller to monitor and control the system pressure to ensure that The device is safe and reliable; a pressure balance tube is set up on the heated reaction kettle. When the liquid column pressure in the balance tube exceeds the system vacuum, the reaction residual liquid will automatically overflow and drain, which can achieve uninterrupted continuous operation and is conducive to industrial continuous production. .

Description

Technical field: [0001] The invention belongs to the field of environmental protection equipment, and specifically relates to an environment-friendly chlorine dioxide generator which adopts a special preparation process, a special structure, low cost, high conversion rate of raw materials and high purity of products. Background technique: [0002] Chlorine dioxide is internationally recognized as the most ideal sterilizing and disinfecting agent, the best substitute of chlorine, and has broad application prospects. Due to the instability and explosiveness of chlorine dioxide, it cannot be packed or compressed for storage and transportation, and needs to be produced and used immediately. [0003] Chlorine dioxide generators can be divided into two categories according to the method of chlorine dioxide generation: chemical method and electrolytic method. The chemical method can be divided into sodium chlorite method and sodium chlorate method according to the raw materials us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B11/02
Inventor 徐炎华朱明新
Owner NJTECH ENVIRONMENT TECH CO LTD
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