Solvent recovery system

Abstract

The invention discloses a solvent recovery system which comprises an induced draft fan, a second adsorption tank, a condenser and a storage tank, a first pipeline is arranged between the condenser and the second adsorption tank, a second pipeline is arranged between the induced draft fan and the second adsorption tank, the storage tank is communicated with the condenser, and a first detector is arranged on the storage tank; the second adsorption tank is used for adsorbing a solvent in the waste gas, and when the second adsorption tank is saturated in adsorption and desorption is carried out, the adsorbed solvent is heated and gradually evaporated out to form mixed steam with water vapor; and when the concentration of the solvent in the mixed steam flowing from the first pipeline to the condenser is less than or equal to 5000mg / m < 3 > within at least continuous 5 minutes, the liquid level in the storage tank passes through the first stage, the second stage and the third stage, and the rising height of the liquid level of the first detector in 5 minutes is less than 10mm, the desorption in the second adsorption tank is completed. The solvent recovery system provided by the invention can accurately judge whether the desorption of the adsorption tank is completed or not and reasonably control the steam energy consumption of system operation.

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