Online cyclic regeneration organic waste gas treatment method and device

Abstract

The invention discloses an online cyclic regeneration organic waste gas treatment method and an online cyclic regeneration organic waste gas treatment device. The device comprises a cyclone tower, a liquid storage tank, a settling pond, a biological desorption chamber, and a storage chamber arranged at one side of the biological desorption chamber, wherein the bottom of the cyclone tower is connected with the settling pond by a pipeline; a centrifugal pump is arranged at the bottom of the settling pond, and adsorbent particle pellets with a cellular structure therein are delivered to the biological desorption chamber by the centrifugal pump; a plurality of cyclone atomizing nozzles arranged in circle of contact are distributed at the circumferential wall of the lower side of the cyclone tower at intervals; organic absorbent solution, desorbed adsorbent particle pellets and organic waste gas are ejected into the cyclone tower by the cyclone atomizing nozzles according to a manner of circle of contact so as to be sufficiently mixed and flow and spirally rise along the circumferential direction of the inner wall of the cyclone tower. According to the invention, the device integrates an adsorbing-recycling method, an absorbing method and a biological method into a set of new device, thus overcoming defects of conventional purification, realizing online cyclic regeneration of the adsorbent, improving the purifying efficiency, lowering the operation cost, and solving 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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