SEPARATING FLY ASH FROM GAS

摘要

A PROCESS FOR THE SEPARATION OF DRY FLY ASH FROM A GAS Process for the separation of fly ash from hot crude synthesis gas by means of a cyclone and a scrubbing system. A fly ash/water slurry derived from the scrubbing system is partly recycled to the hot crude synthesis gas before the cyclone and partly withdrawn. In conventional gas purification systems there exists a serious chance of the building-up of corrosive materials like halogenides and formic acid, in the water recycle loop(s). This drawback is avoided by the improvement according to the present invention.