Verfahren zum Abscheiden von gasfoermigen Alkaliverbindungen und/oder fluessigen, aufgeschmolzenen oder klebrigen Feststoffteilchen aus heissen Gasstroemen

DE 19858675 A UPAB: 20000405 NOVELTY - Particles of bauxite or quartz, with a catalytic coating of iron oxide, having a diameter of 0.01-0.5 mm are injected into a mixing reactor (1) above a waist (14). The pressure in the reactor is 25-100 bar, which is sufficient to carry the mixture through a cyclone and dust filter to remove the particles, now adsorbed by the pollutants, before the clean gas enters the turbine (4) and heat exchanger (5). The particles are at 600-1000 deg. C as they meet the gas stream, which is at ca. 1500 deg. C. The gas is therefore precooled during a contact time of up to 10 seconds. USE - For cleaning and cooling hot, coal generated, process gas before entry to a turbine. ADVANTAGE - The process is simple and effective, as the turbine cannot tolerate the alkaline fumes or the sticky grit that form part of the gas-stream, nor its high temperature