Full-temperature-range pressure swing adsorption method for removal and recovery of organic tail gas containing different concentrations of VOCs (volatile organic compounds)

Abstract

The invention discloses a full-temperature-range pressure swing adsorption method for removal and recovery of organic tail gas containing different concentrations of VOCs (volatile organic compounds). According to the full-temperature-range pressure swing adsorption method, the organic tail gas enters a pressure swing adsorption and concentration process, operating pressure ranges from 0.1Mpa to 0.6Mpa, the temperature ranges from 60 DEG C to 150 DEG C, the concentration of the VOCs treated through the FTrPSA (full-temperature-range pressure swing adsorption) method is decreased to below 100ppm, and desorbed VOCs concentrated gas enters a VOCs recovery process after pressurization to further concentrate and recover the VOCs. The full-temperature-range pressure swing adsorption method for removal and recovery of the organic tail gas containing different concentrations of VOCs has the advantages that whole-concentration and full-component recovery of the tail gas containing high-concentration VOCs and energy-saving recovery making the most of energy are achieved, energy consumption of steam, electricity and circulating water is reduced substantially, and the tail gas with the VOCs removed effectively reaches national emission standards; the problems of inadequate treatment depth, incapability of removing the VOCs effectively, high energy consumption, high cost, short device service life and the like of the prior art are solved, and limitations on tail gas organic matter concentration and component content nonuniformity in the prior art are overcome.

Description

technical field [0001] The invention relates to the field of removal and recovery of organic waste gas VOCs, and more particularly relates to a full temperature range pressure swing adsorption method for removing and recovering organic tail gas containing VOCs with different concentrations. Background technique [0002] VOCs-containing industrial gases are widely found in many chemical processes and emissions from printing, shoemaking, automobiles, hardware appliances, and spraying in the aviation industry. Such exhaust gases have low concentrations of alcohols, ketones, benzene, esters, ethers, and sulfur. , has no recycling value, and most of them have toxic and strong irritating odors, which disturb the people and pollute the environment. Various VOCs-containing exhaust gases often contain uneven concentrations of VOCs, and some are relatively high. For example, the content of acetone and n-hexane in the VOCs emitted by the paint industry exceeds 1~3% (v / v% by volume), an...

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Problems solved by technology

[0005] The invention provides a full temperature-range pressure swing adsorption method for the removal and recovery of organic tail gas containing different concentrations of VOCs, which solves the problem of insufficient treatment depth in the prior art and cannot effectively solve the environmental health problems caused by the removal of VOCs and their bitterness and irritating odor. It solves the problems of high energy consumption, high cost, and short device life in the existing technology, and also overcomes the limitations of the existing technology on the concentration of organic matter in the tail gas and the content of components.

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