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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  • Abstract
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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
  • 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 present invention is one kind of environment protection chlorine dioxide generator with special technological process, special structure, low cost, high material converting rate and high product purity. The chlorine dioxide generator features normal temperature reaction kettle and heated reaction kettle to form concentration and temperature gradient and smooth and safe reaction, solid sodium chloride metering and material feeding resulting in greatly reduced sulfuric acid consumption and acid effluent, pressure detecting instrument and safety valve in the discharge pipe and combined with the feeding controller for effective system pressure monitoring and control, and the pressure balancing pipe set on the heated reaction kettle for automatic overflowing of the reaction residue. The present invention realizes continuous operation and is favorable to industrial 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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