Energy-saving fractionation device for xylene production

Abstract

The present invention discloses an energy-saving fractionation device for xylene production, and relates to the technical field of xylene fractionation. The energy-saving fractionation device for xylene production comprises a first box body and a second box body installed at the bottom of the first box body, wherein the bottom of the second box body is rotatably provided with a vertical screw, a driving mechanism in transmission connection with the top end of the screw is fixed to the top of the first box body, the top of the screw is sleeved with a sleeve in a threaded mode, a first circular plate and a second circular plate are fixed to the two ends of the sleeve correspondingly, the circumferential outer walls of the first circular plate and the second circular plate are close to and do not make contact with the inner walls of the first box body and the second box body, a vertical pipe is fixed between the first circular plate and the second circular plate, and a plurality of sets of annularly-distributed adsorption plates are fixed to the circumferential outer wall of the vertical pipe. The adsorption plates can fully adsorb stock solutions at different heights in the first box body and the second box body in the lifting process, and the usage amount of a desorption solution is reduced.

Description

technical field [0001] The invention relates to the technical field of xylene fractionation, in particular to an energy-saving fractionation device for xylene production. Background technique [0002] In the existing xylene fractionation device, the p-xylene in the C8 aromatics is often separated from the other three isomers by using selective adsorbents and desorbents to achieve the purpose of producing high-purity p-xylene. For the differences in the adsorption capacity of the four C8 aromatic isomers, ethylbenzene, m-xylene and o-xylene with weaker adsorption capacity are quickly desorbed from the adsorbent with the desorbent, called raffinate The p-xylene with strong adsorption capacity is selectively adsorbed by the adsorbent, and then slowly desorbed from the adsorbent with the desorbent, which is called the extraction liquid, so as to achieve the purpose of separating p-xylene. [0003] The Chinese invention patent with publication number CN111957071A in the prior ar...

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Problems solved by technology

[0005] The purpose of the present invention is to provide an energy-saving fractionation device for xylene production to solve the problem that the position of the adsorption plate in the long box is relatively fixed in the prior art, and it can only rotate at a fixed position and cannot perform dynamic movement. The technical problem of insufficient adsorption of xylene on the adsorption plate

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