Reactors for large scale solvent recovery

First, evacuate the equipment system to a negative pressure state, close vacuum valve V03,

open feed valve V01, and the mixed liquid in storage tank B01 is sucked into the evaporator

under pressure difference. The vaporized light phase substance (solvent) is condensed through

condensers HE01 and HE02 and collected in storage tanks B03 and B04. The heavy phase

concentrate flows out from the bottom of the evaporator and is collected in storage tank B02.

As distillation proceeds, the materials in storage tank B01 enter the negative pressure system,

causing an increase in pressure within the system. When a certain limit is reached, feeding is

stopped, and the system is vacuumed again before feeding. This cycle controls the distillation

within a certain pressure range and is carried out in a closed manner. After one cycle of

operation, the concentrated solution is sampled and analyzed from V02. If the solvent residue

does not meet the requirements, it can be transported to the storage tank B01 for secondary

concentration through the feed pump VP01.