Process for purifying raw gas from the gasification of solid fuels
US4087258A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1977 |
| Grant date | May 2, 1978 |
| Priority date | — |
| Expiry date | Mar 9, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10K1/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process is disclosed for purifying raw gas produced by the gasification of solid fuels under superatmospheric pressure by treatment with gasifying agents containing water vapor and free oxygen. The raw gas contains dust and hydrocarbons and is at a temperature of 400.degree.-700.degree. C as it leaves the gas producer. The raw gas is purified by spraying in at least two scrubbing stages with virtually dustfree, highly dispersed scrubbing water at temperatures of 160.degree.-300.degree. C. In this manner, the gas is cooled to a temperature that is 0.degree.-20 C above the scrubbing water temperature and is saturated with water vapor in the scrubbing stages. Thereafter, the gas is subjected to centrifugal force to increase the relative velocity between gas and water droplets. The scrubbing water which contains dust and tar is withdrawn from each scrubbing stage. For the first scrubbing stage a cyclone-type scrubber can be used and for the second scrubbing stage a radial flow-type scrubber or a Venturi-type scrubber can be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.