Pressure swing adsorption recovery unit of organic exhaust gas and method thereof

Abstract

The invention discloses a pressure swing adsorption recovery unit of organic exhaust gas, including a filter cooling device, an exhaust pipe connected to the filter cooling device, an absorption tower connected to the exhaust pipe, and a vacuum pump connected to the absorption tower, wherein, the absorption tower includes a pressurized chamber, an adsorption layer and a purification chamber; the pressurized chamber is connected with an exhaust valve for communicating the exhaust pipe, a vacuumizing valve for connecting the vacuumizing tube and a pressurized chamber equalizing valve for connectiing pressurized chamber equalizing tube; the purification chamber is connected with a purification gas valve for connecting the purification gas tube and a purification chamber equalizing valve for connectiing purification chamber equalizing tube; and the import of the vacuum pump is connected with the vacuumizing tube. As the present invention uses four adsorption towers structure and the four adsorption towers alternately operate, thereby ensuring the cycle and concatenation of gas separation process; can fully collect organic exhaust gas, and can be applied in the pressure swing adsorption separation of exhaust gas and recycling of organic solvents, greatly reduce production costs, and has a good promotional value.

Description

technical field [0001] The invention relates to a waste gas pressure swing adsorption recovery device, in particular to a device capable of absorbing and recovering organic waste such as benzene, aldehyde, phenol, ether, ketone, ester, alcohol, etc. Exhaust device. Background technique [0002] Volatile organic compounds are the most common type of pollutants emitted by petrochemical, pharmaceutical, printing, shoemaking, painting and other industries. Most of these organic substances are toxic, and some have been listed as carcinogens, such as formaldehyde, vinyl chloride, benzene, polycyclic aromatic hydrocarbons, etc., which cause great harm to the environment, the growth of animals and plants, and human health. At present, domestic methods for treating such gases include activated carbon adsorption, carbon fiber adsorption, membrane separation, etc. Most vinyl chloride plants still use activated carbon adsorption. The cost of recovery by this method is high, and the st...

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Problems solved by technology

In the past 30 years, pressure swing adsorption (PSA) technology has developed rapidly as a new non-low temperature separation method. However, pressure swing adsorption for organic waste gases such as benzene is still a problem. The efficiency of the device is low, and users cannot directly see the reduction in production. Cost of Hope, Difficulty in Promotion

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