System for decontaminating dry cleaning waste water with controlled pumping
US5223126A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1991 |
| Grant date | Jun 29, 1993 |
| Priority date | — |
| Expiry date | Dec 5, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06F43/081
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system for decontaminating waste water produced during dry cleaning operations wherein the waste water contains dry cleaning solvent and particulate contaminants, the system comprising: a storage tank including an inlet through which the waste water is introduced into the storage tank and walls defining a settling chamber having a bottom sediment zone, wherein at least a portion of the dry cleaning solvent and particulate contaminants in the waste water settle by gravity to form a sediment in the sediment zone and provide partially decontaminated waste water which contains reduced amounts of the dry cleaning solvent and particulate contaminants; pump means for removing the partially decontaminated waste water from the settling chamber; particulate filter means for removing substantially all of the particulates remaining in the partially decontaminated waste water to provide particulate free waste water; solvent filter means for removing substantially all of the dry cleaning solvent remaining in the particulate free waste water to provide decontaminated waste water; and evaporator means for evaporating the decontaminated waste water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.