Plate-type adsorption and desorption device for purifying and recovering volatile organic matters in exhaust gas

Abstract

The invention relates to a plate-type adsorption and desorption device for purifying and recovering volatile organic matters in exhaust gas, which comprises a framework and a plurality of thin metal heat transfer plates. The thin metal heat transfer plates are fixed on the framework in sequence; the edge lining of adjacent two thin metal heat transfer plates is compressed by a gasket; four corners of each thin metal heat transfer plate are provided with through holes so that two channels are formed; and the exhaust gas containing volatile organic matters, cold liquid and hot liquid or steam flow through the through holes on two sides of the thin metal heat transfer plate alternatively to exchange heat. The invention has the advantages that: (1) the flow velocity of the fluid on two sides of the surfaces of the thin metal heat transfer plates is high, the total heat transfer coefficient is high, and the heat transfer is changed; (2) the exhaust gas and the solid adsorbent can contact more fully, the flow velocity of the exhaust gas is high, and the transfer mass is strengthened; (3) the plate-type adsorption and desorption device has a compact structure, the number of the thin metal heat transfer plates can be increased and decreased according to needs of productivity, or the units can be connected in parallel; (4) the heat transfer area of unit volume is large, and the consumption of metal material is low; (5) the plate-type adsorption and desorption device has high operational flexibility and is convenient to move to work; and (6) the plate-type adsorption and desorption device has the operating pressure of 1.0MPa to 1.2MPa or 0.1MPa.

Description

technical field [0001] The invention relates to the fields of environmental protection and chemical separation, in particular to a plate-type adsorption-desorption device for purifying and recovering volatile organic compounds in waste gas. Background technique [0002] VOCs generated from the production process of chemical industry, biomedicine, light industry, textile and mechanical electronics S Industrial waste gas, at present, widely use activated carbon fiber (ACF), granular activated carbon (GAC), molecular sieve and other solid adsorbents to adsorb VOC by temperature swing adsorption (TSA) or pressure swing adsorption (PSA) method S The exhaust gas can be purified and emptied, and the adsorption process can achieve the adsorption of the adsorbent by VOC S VOCs removed from the adsorbent after saturation using temperature swing (TSA) or pressure swing desorption (PSA) S The steam is condensed, cooled, liquefied and recovered, and recycled after purification. Adso...

AI Technical Summary

Problems solved by technology

These devices have many disadvantages, such as insufficient contact between exhaust gas and adsorbent, slow flow rate of cooling or heating agent, low efficiency of mass transfer and heat transfer, not compact equipment, etc.

Images