Process for adsorbing and concentrating organic waste gas

Abstract

The invention provides a process for adsorbing and concentrating organic waste gas. Two rotary valve rotors rotate synchronously in the same direction according to time control, and a gas distributionvalve carries out gas flow distribution with the rotation of the rotary valve rotor, so that in at least six zeolite honeycomb beds, four are kept in an adsorption state, one is in a desorption state, and one is in a cooling state to realize continuous cycle of adsorption-desorption-cooling-re-adsorption of each zeolite honeycomb bed. According to the process provided by the invention, a plurality of small zeolite honeycombs are combined to prepare a fixed adsorber, and adsorption and desorption air flows are reasonably arranged through a rotary air valve to realize synchronous adsorption anddesorption. In the method, air chambers are switched through a valve, so that the driving energy consumption is obviously reduced; moreover, the valve switching process can effectively avoid the abrasion of a contact surface and prolong the service life of an adsorbing material.

Description

【Technical field】 [0001] The invention belongs to the technical field of environmental protection equipment, and specifically refers to a process for absorbing and concentrating organic waste gas. 【Background technique】 [0002] In the process of treating low-concentration and high-volume volatile organic gases, fixed-bed honeycomb activated carbon or zeolite rotor is usually used for adsorption and concentration. The fixed-bed honeycomb activated carbon is gradually replaced by the zeolite rotor due to the flammability of the activated carbon desorption process, and the development and research of the zeolite rotor has become a current research hotspot. [0003] The zeolite runner in the prior art, first of all, has a rubber sealing strip on the contact surface between the zeolite honeycomb and the equipment, which requires high strength on the contact surface of the zeolite honeycomb, and with the long-term operation of the equipment, the sealing is not good due to the abr...

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Problems solved by technology

[0003] The zeolite runner in the prior art, first of all, has a rubber sealing strip on the contact surface between the zeolite honeycomb and the equipment, which requires high strength on the contact surface of the zeolite honeycomb, and with the long-term operation of the equipment, the sealing is not good due to the abrasion of the zeolite surface and the aging of the sealing material. In severe cases, it is easy to cause the exhaust gas to be discharged below the standard; secondly, the integral zeolite honeycomb of the core adsorption material of the zeolite runner is more difficult to process, and the process requirements are higher. At present, most mature zeolite honeycombs in China are small pieces of 50×50×50 Honeycomb, because the preparation process is different from international ones, the stacking weight of this kind of honeycomb body is relatively high, and the power consumption of the drive system is relatively large after being installed in the rotary enrichment device

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