Method of keeping gas heat exchanger surfaces free of deposits by means of circulating particles with a certain size distribution

摘要

The present invention relates to a method and arrangement for keeping gas heat exchanger surfaces free of deposits, according to which particles with a certain particle size distribution are made to circulate in a circuit which includes the heat exchange space 5 in countercurrent to the gas, the particle size distribution being selected so that particles are kept suspended both in the heat exchange space by the upward-flowing, hot gas and in this connection collide with the heat exchanger surfaces, and above the heat exchange space (at 8). IMAGE