Solvent recovery apparatus and method

Details Solvent recovery apparatus and method Solvent recovery apparatus and method

1998-03-31

2000-11-21

Popovics, Robert J.

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Diverse sensing means

210 86, 210167, 210193, 210224, 210241, 210248, 210259, 210295, 210533, 210537, 210540, 34 72, B01D 17032

Patent

active

061498025

ABSTRACT:
A solvent recovery apparatus for recovering low volatility solvent from a washing fluid slop includes a settling system and a filtering system. The settling system includes one or more settling stages and an off-take by which settled, re-usable solvent may be recovered. The filtering system uses a single filter press to filter batches of wastewater, with solids, and batches of solvent sludge, with solids, such that cleaned wastewater filtrate may be discarded, benign removed solids may be dried and sent to landfill, and solvent filtrate may be returned to the input end of the solvent recovery apparatus for re-processing. The solvent recovery apparatus can use a two stage settling system which permits an initial separation of most of the wastewater, and a secondary settling of a solvent rich portion of the slop. The secondary settling can be performed with a system of alternating settling tanks in which one tank is allowed to settle while another is being filled. The apparatus operates at room temperature and can be assembled on a single skid for ease of installation.

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