Removal of sour water from coal gasification slag
US4465496A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 10, 1983 |
| Grant date | Aug 14, 1984 |
| Priority date | — |
| Expiry date | Jan 10, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S48/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for the removal of slag and other residual solid material from a coal gasification process as a suspension in water free from noxious gases normally associated therewith wherein water is drawn off from the quench section of a coal gasifier with the slag into lock hopper and is displaced by introducing cold fresh water into the lower portion of the lock hopper displacing the sour water from an exit in the upper portion of the lock hopper back into the quench section of the coal gasification system. In an alternate embodiment, noxious gases are stripped from the quench water in the lock hopper with a stripping gas. Solid waste and clean or decontaminated water are discharged from the system without pollution of the environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.