Activated carbon fiber organic solvent recovery novel technique using nitrogen as desorption medium

An organic solvent and activated carbon adsorption technology, applied to the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve the problems of reduced utilization rate, easy corrosion of equipment, and influence on adsorption performance, so as to reduce equipment manufacturing costs and expand Application range and effect of extending service life

Inactive Publication Date: 2008-11-12
中节能天辰(北京)环保科技有限公司
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Problems solved by technology

[0003] 1) Secondary discharge sewage, especially when recovering organic matter with high solubility, is difficult to treat, and the operation cost of using a rectification tower is high
[0004] 2) During desorption, a large amount of water vapor condenses in the activated carbon fiber adsorption layer. Although the dry wind blows, the water content of the activated carbon fiber is still high, which affects its adsorption performance and reduces the utilization rate.
[0005] 3) When the organic waste gas contains substances such as easily hydrolyzed substances or halogenated hydrocarbons, the equipment is easily

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  • Activated carbon fiber organic solvent recovery novel technique using nitrogen as desorption medium

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Embodiment Construction

[0017] The accompanying drawing shows a system for recovering organic solvent components from waste gas. The organic waste gas collection system 1 collects the working airflow to be treated in the process of the present invention. The induced draft fan 2 provides power, and the air flow control three-way valve 3 controls the flow direction. When the system is working, the air inlet is opened to introduce organic waste gas into the processor for adsorption. When the system is maintained, the exhaust port is opened. The filter and the precooler 4 can remove most of the suspended solids and can adjust the temperature and humidity of the exhaust gas to prolong the service life of the active carbon fiber and improve the adsorption effect. The cooling fan 5 can introduce ambient air into the adsorber to reduce the temperature of the adsorption layer. The heater 6 can heat the nitrogen to 80-400 degrees, and the high-temperature nitrogen is used to activate the active surface carbon...

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Abstract

The invention provides a novel organic gas processing technique, which expends the application area of activated carbon fiber adsorbent. The technique uses hot nitrogen as desorption medium, and recovers the enriched desorption gas in a cooling or absorption manner, thereby realizing zero-release of pollution. The nitrogen is replaced before heating-desorption, and the safe running of a recovery device can be guaranteed by using temperature and oxygen content on-line monitoring system to control the switch of a nitrogen safety valve. By using the hot nitrogen as the desorption medium, the problems of secondary pollution, corrosion and high running cost etc. generated during water vapor desorption in the traditional technique can be overcome, thereby improving the efficiency, prolonging the serving life and expanding using range, so that the technique has good application and popularization value.

Description

technical field [0001] The present invention relates to the recovery of high-boiling gaseous compounds such as vaporized compounds that are normally liquid from vaporous mixtures, and especially relates to the recovery of organic solvent-containing waste gases from printing, light industry, coating, chemical industry, electronics and other industries in the production process. Equipment and method for recovering and recycling various organic solvents. Background technique [0002] In the past, the activated carbon fiber solvent recovery process was mainly used in the recovery of toluene, xylene, cyclohexane, halogenated hydrocarbons and other organic substances that are difficult to dissolve in water. For example, Chinese patent ZL200510200344.8 discloses a new process for automatic recovery of industrial organic waste gas Chinese patent ZL02233407.6 discloses an activated carbon fiber waste gas adsorption and recovery device. The above patents all use the method of water va...

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Application Information

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IPC IPC(8): B01D53/04
Inventor 张平
Owner 中节能天辰(北京)环保科技有限公司
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