High-concentration VOC gas purification and recovery apparatus and high-concentration VOC gas purification and recovery method

Abstract

The present invention belongs to the technical field of chemical industry equipment and chemical industry processes, and relates to a high-concentration VOC gas purification and recovery apparatus and a high-concentration VOC gas purification and recovery method. The high-concentration VOC gas purification and recovery apparatus comprises six parts such as an adsorption tower, a first overflow tower, a conveying system, a second overflow tower, a desorption tower and an organic solvent recovery system, wherein high-concentration VOC gas is adsorbed in the adsorption tower through active carbon, the active carbon is subjected to desorption regeneration with nitrogen in the desorption tower, the nitrogen can be recycled, and an organic solvent is recovered through a condensing method in the organic solvent recovery device so as to achieve the reutilization of resources. With the apparatus and the method of the present invention, the problem of the fixed bed layer firing caused by the incapable dissipating of the reaction heat can be solved, and the whole process has advantages of continuous and stable operation, active carbon regeneration, organic solvent resource recycling, and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical technology and equipment, and relates to a purification and recovery device and method for high-concentration VOC gas. Background technique [0002] Volatile organic compounds are referred to as VOCs for short. The main chemical components are benzene series, alcohols, alkanes, ketones and esters. They are currently a large class of air pollutants and have great harm to human health and the natural environment. . The components contained in VOC gas will cause certain damage to the organs of the human body, causing symptoms such as dizziness, nausea, and fatigue. The benzene series in it are also carcinogenic; Under the action of light and heat, it can participate in the nitric oxide reaction and form ozone, which leads to poor air quality and is the main component of summer smog, and is also one of the main sources of winter smog; a large amount of VOC gas emissions also cause organic solvents ...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the bed layer is easy to catch fire when the fixed bed adsorbs high-concentration VOC gas, the regeneration of adsorbed saturated activated carbon, and the recovery and reuse of organic solvents, and provides a high-concentration VOC gas purification and recovery device and method. The entire process flow It can operate continuously and stably. The fluidized bed adsorption can solve the fire problem of the fixed bed bed. The regeneration of activated carbon is realized in the desorption tower, and the recycling of organic solvent resources in the waste gas is realized in the organic solvent recovery system.

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