PYROLYSIS-COMBUSTION DUAL-BED SYSTEM FOR ELIMINATING CONTAMINATION CAUSED BY COMBUSTION OF HIGH-SODIUM COAL

摘要

A pyrolysis-combustion dual-bed system Comprises a fluidized bed, a cyclone separator, a coal ash distributor, an ash-coal mixer, a lower pyrolysis bed, a return feeder and a cleaner, wherein the cyclone separator is connected with an upper lateral side of the fluidized bed, the outlet end of the cyclone separator is connected with the inlet end of the coal ash distributor; the two outlets of the lower pyrolysis bed are respectively connected with the inlet of an external bed and the inlet of the cleaner; the outlet of the external bed is connected with the inlet of the return feeder; the return feeder close to the lower lateral side of the fluidized bed is connected with the inlet on the lower lateral side of the fluidized bed; and the outlet of the cleaner is connected with the inlet of the lower lateral side of the fluidized bed.

主权项

1. A pyrolysis-combustion dual-bed system for eliminating the contamination caused by the combustion of a high-sodium coal, comprising: a fluidized bed, a cyclone separator, a coal ash distributor, an ash-coal mixer, a lower pyrolysis bed, a return feeder and a cleaner, wherein the cyclone separator is connected with an upper lateral side of the fluidized bed so that the high-temperature coal ash from the fluidized bed enters the cyclone separator, the outlet end of the cyclone separator is connected with the inlet end of the coal ash distributor which is provided with two outlets one of which is connected with the inlet, of the return feeder and the other one of which is connected with the inlet of the ash-coal mixer; the outlet of the ash-coal mixer is connected with the inlet of the lower pyrolysis bed; the lower pyrolysis bed is provided with two outlets one of which is connected with the inlet of an external bed and the other one of which is connected with the inlet of the cleaner; the outlet of the external bed is connected with the inlet of the return feeder; the return feeder close to the lower lateral side of tire fluidized bed is connected with the inlet on the lower lateral side of the fluidized bed; and the outlet of the cleaner is connected with the inlet of the lower lateral side of the fluidized bed.