Method and device for treating organic waste gas with on-line circulation regeneration

Abstract

An online cyclic regeneration organic waste gas treatment method and device. The device comprises a cyclone tower (8), a liquid storage tank (4), a settling tank (10), a biological desorption chamber (5), and a storage chamber (9) disposed at one side of the biological desorption chamber (5). The bottom of the cyclone tower (8) is connected with the settling tank (10) by means of a pipeline; a centrifugal pump is disposed at the bottom of the settling tank (10), and adsorbent particle pellets (5-1) having a micropore structure in the settling tank are delivered to the biological desorption chamber (5) by the centrifugal pump; a plurality of cyclone atomizing nozzles (7) arranged in circle of contact is distributed at the circumferential wall of the lower side of the cyclone tower (8) at intervals; an organic absorbent solution, desorbed adsorbent particle pellets (5-1), and organic waste gas are ejected into the cyclone tower (8) by the cyclone atomizing nozzles (7) in a manner of circle of contact and are sufficiently mixed, and flow and spirally rise along the circumferential direction of the inner wall of the cyclone tower (8). The device integrates an adsorption-recycling method, an absorption method, and a biological method into a new device, thus overcoming the defect of conventional purification, achieving online cyclic regeneration of an adsorbent, improving purification efficiency, reducing operating costs, and resolving the problem of low regeneration efficiency of the adsorbent.

Description

technical field [0001] The invention relates to the treatment of recycled organic waste gas, in particular to an online recycled organic waste gas treatment method and device. Background technique [0002] Urban atmospheric smog and excessive ozone are major environmental pollution problems facing our province, and VOCs are important precursors for their formation. VOCs are not only diverse, but most of them are poisonous, some of them are carcinogenic, and seriously pollute the environment and endanger human health. With the rapid development of the economy, the pollution of organic waste gas (VOCs) is becoming more and more serious, and the potential for potential discharge is huge. Promoting its treatment has been included in the national key work of air pollution prevention and control. [0003] At present, the methods of treating industrial organic waste gas mainly include absorption method, condensation method, catalytic combustion, adsorption-recovery method, biologic...

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Problems solved by technology

[0005] (1) The local "overheating" adsorption process of the fixed bed is an exothermic process, which may cause local "overheating" of the fixed bed due to excessive release of adsorption heat or poor heat transfer effect of the fixed bed, and even cause the activated carbon adsorbent to catch fire

[0006] (2) The pressure drop is too large. The adsorbent particles in the fixed bed are closely arranged, causing the pressure drop of the organic waste to be too large, which limits the flow rate and reduces the treatment capacity of the organic waste gas with a large air volume.

[0007] (3) "Channel flow" is easy to appear. For the area where the accumulation is relatively loose in the adsorption bed, the airflow will pass through preferentially to form a "channel flow", which makes the adsorption bed penetrate prematurely, and some adsorbents cannot fully contact with the organic waste gas, resulting in adsorption. reduction in efficiency

[0008] The traditional desorption method is to use hot air blowing desorption and other methods, which has the advantages of simplicity and ease, but at the same time has the following disadvantages: the enriched organic waste gas is mixed into the air; the follow-up treatment is cumbersome; energy consumption is high, etc.

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