Method for recovering solvent in non-condensable gas containing solvent vapor and device thereof

Abstract

The invention discloses a method for recovering a solvent in a non-condensable gas containing solvent vapor and a device thereof. The method contains steps of using wash oil as an absorbent, absorbing, analyzing and condensing to obtain the solvent. The device contains a tail gas surge pot, a wash oil absorbing tower, a wash oil analytic tower and a condenser for the analytic tower, wherein the upper portion of the wash oil analytic tower is connected with a wash oil storage tank and the lower portion is connected with the tail gas surge pot; the bottom of the wash oil absorbing tower is connected with the upper portion of the wash oil analytic tower through a fat oil pump and a heater; the lower portion of the wash oil analytic tower communicates with the upper portion of the wash oil absorbing tower through a lean oil pump and a cooler; and the top of the wash oil analytic tower is connected with the condenser for the analytic tower. According to the invention, low-priced wash oil is used as the absorbent, has a good absorption effect of the solvent in the non-condensable gas and is convenient for analysis. The solvent in the non-condensable gas can be efficiently recovered by absorption and analysis. The invention has advantages of simple technological process, less equipment investment, low operation cost and energy saving and consumption reduction.

Description

technical field [0001] The invention belongs to the technical field of solvent separation technology, and in particular relates to a solvent recovery method and a device thereof in noncondensable gas containing solvent vapor. Background technique [0002] In the petrochemical animal and plant wax leaching production technology, the solvent used to extract the wax is recycled, and the separation of the solvent from wax and coal in the leaching process is an important link, so evaporation, evaporation, leaching The recovery of solvent gas in the non-condensable gas produced by the system is an important and difficult point. The free gas during solvent recovery is mainly generated from three aspects: one is the solvent vapor that is not condensed in the condenser by the saturated vapor of the solvent; wax solution storage tank, solvent storehouse, etc.); the third is the air brought in by the pores of raw material particles during the leaching process or the air brought in by ...

AI Technical Summary

Problems solved by technology

If it is discharged as tail gas, the solvent loss in it is very large, which is the main reason for the high solvent consumption in the wax leaching production process, and is also the main factor of polluting the environment

At present, the leaching industry of petrochemical animal and plant waxes (mainly referring to montan wax) at home and abroad, especially in China, uses cold water cooling for solvent recovery in free gas, and the concentration of solvent vapor in tail gas emissions is still 5%-10 % or so, not only pollute the environment, but also increase the solvent consumption

Images