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Device and method for recovering volatile organic chloride gas

A technology of volatile organic and organic chlorides, applied in chemical instruments and methods, gas treatment, separation methods, etc., can solve the problems of incomplete decomposition of organic waste gas, short service life of activated carbon, high operating cost, etc., and achieve good technical adaptability and market application prospects, good high humidity resistance and high degree of automation

Pending Publication Date: 2017-03-29
SHANGHAI SINYANG SEMICON MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the service life of activated carbon is short, and the waste activated carbon is treated as solid waste, which not only pollutes the environment but also increases the use cost of enterprises.
Chinese patent CN102764559 proposes a treatment scheme that uses activated carbon or activated carbon fiber to absorb volatile organic waste gas, and then desorption-rectification-pervaporation separation. The re-adsorption efficiency of post-activated carbon is low, and the treatment effect on VOC is poor
In addition, the use of rectification and membrane separation and recovery processes is inefficient, resulting in extremely high operating costs and large obstacles to industrialization
The combustion method is one of the most widely used methods for treating organic waste gas, but because organic chlorides are prone to produce highly toxic dioxin substances after combustion, this method is not recommended for the treatment of volatile organic chlori

Method used

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  • Device and method for recovering volatile organic chloride gas

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 683 liters of adsorption resin (commercially available) are packed in the adsorption tower, and this adsorption tower uses fluidized bed design, and three adsorption towers are all filled with resin in the same way. Will contain trichlorethylene concentration of 850mg / m 3 , The exhaust gas with a humidity of 40% first passes through a three-stage high-efficiency filter with a pore size of 200 mesh to remove paint residue or dust particles in the exhaust gas. The temperature of the exhaust gas is 30 degrees Celsius. Under the action of the fan, the exhaust gas passes through the first adsorption tower 101 for primary adsorption at an air volume of 50,000 cubic meters per hour, and the second adsorption tower 102 for secondary adsorption. The second adsorption tower 102 is monitored by PID The exhaust gas concentration at the outlet, the result shows that the exhaust gas emission concentration is 6mg / m 3 .Below the national standard, after 4 hours of continuous adsorptio...

Embodiment 2

[0049] 683 liters of adsorption resin (commercially available) are packed in the adsorption tower, and this adsorption tower uses fluidized bed design, and three adsorption towers are all filled with resin in the same way. Will contain trichlorethylene concentration 850mg / m 3 , The exhaust gas with a humidity of 80% first passes through a three-stage high-efficiency filter with a pore size of 200 mesh to remove paint residue or dust particles in the exhaust gas. The temperature of the exhaust gas is 25 degrees Celsius. Under the action of the fan, the exhaust gas passes through the first adsorption tower 101 for primary adsorption at an air volume of 40,000 cubic meters per hour, and the second adsorption tower 102 for secondary adsorption. The second adsorption tower 102 is monitored by PID The exhaust gas concentration at the outlet, the result shows that the exhaust gas emission concentration is 7.1mg / m 3 .Below the national standard, after 4 hours of continuous adsorption...

Embodiment 3

[0051] 683 liters of adsorption resin (commercially available) are packed in the adsorption tower, and this adsorption tower uses fluidized bed design, and three adsorption towers are all filled with resin in the same way. Will contain tetrachlorethylene concentration of 2000mg / m 3 , The organic waste gas with a humidity of 40% first passes through a three-stage high-efficiency filter with a pore size of 200 mesh to remove paint residue or dust particles in the waste gas. The temperature of the exhaust gas is 35 degrees Celsius. Under the action of the fan, the exhaust gas passes through the first adsorption tower 101 for primary adsorption) and the second adsorption tower 102 for secondary adsorption) with an air volume of 30,000 cubic meters per hour). The tail gas concentration at the outlet shows that the tail gas emission concentration is 7.6 mg / m3, which is lower than the national standard. After 4 hours of continuous adsorption treatment, the first adsorption tower 101 ...

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Abstract

The invention discloses a device and a method for recovering volatile organic chloride gas. The device for recovering the volatile organic chloride gas is characterized by comprising one or a plurality of adsorption towers, a heating device and a first condenser, wherein adsorption resin is arranged in the adsorption towers; the heating device communicates with all or parts of the adsorption towers, and is used for inputting hot air or water vapor into the adsorption towers; the first condenser communicates with all or parts of the adsorption towers; after the adsorption resin in the adsorption towers adsorbing the organic chloride gas, the heating device inputs the hot air or the water vapor into the adsorption towers, so that the organic chloride gas adsorbed onto the adsorption resin is separated from the adsorption resin; the organic chloride gas is input into the first condenser to be condensed into liquid; then, the liquid is output. The concentration of organic chlorides discharged after the treatment by the recovering device and method is lower than 10mg/m<3>.

Description

technical field [0001] The invention relates to a device and a method for recovering volatile organic chloride gas. Background technique [0002] Organic chlorides (such as dichloromethane, chloroform, carbon tetrachloride, trichloroethylene, tetrachloroethylene) and other organic solvents are widely used in surface coating, pharmaceutical synthesis, packaging printing, adhesives, metal cleaning and other industries During use, production and use, volatile organic chloride gas will be directly discharged due to volatilization. As we all know, organic chlorides are highly toxic, stimulating and anesthetic. Acute poisoning by inhalation has upper respiratory tract irritation symptoms, tearing, salivation, followed by dizziness, headache, nausea, movement disorders and drunkenness-like symptoms. In severe cases, liver damage and poisoning may occur, and even coma soon. Moreover, organic chlorides may also be highly carcinogenic, causing malignant tumors or leukemia. A serie...

Claims

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Application Information

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IPC IPC(8): B01D53/04
CPCB01D53/0438B01D53/0454B01D2257/2064
Inventor 方书农梁重时王溯方云英
Owner SHANGHAI SINYANG SEMICON MATERIALS
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