Process for purifying raw gas from the gasification of solid fue

Details Process for purifying raw gas from the gasification of solid fue Process for purifying raw gas from the gasification of solid fue

1977-03-09

1978-05-02

Thomas, Earl C.

Gas: heating and illuminating

Processes

Fuel mixtures

48206, 55 68, 55 73, 423232, 423245, 4232155, 252373, C01K 106, C01J 300, B01D 5334

Patent

active

040872580

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 The scrubbing water which contains dust and tar is withdrawn from each scrubbing stage.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.

REFERENCES:
patent: 3011966 (1961-12-01), Jahnentz et al.
patent: 3518812 (1970-07-01), Kolm
patent: 3540867 (1970-11-01), Baron et al.
patent: 3834127 (1974-10-01), Jordon et al.

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