| 摘要 |
PURPOSE:To inhibit the adhesion of clinker ash to the wall surface of a boiler, an oven, etc., by blending pulverized coal with an iron compd. and an alkali (alkaline earth) metal compd. which are in an aq. soln. form or a particulate form. CONSTITUTION:Coal stocked in a banker 1 is fed through a coal feeder 2 into a pulverizer 3, where the coal is pulverized to about 200-mesh powder. Concurrently, a mixture of an iron compd. (A) with a metal compd. (B), such as Cu or Mn and/or an alkali (alkaline earth) metal compd., such as Na, K, Ba or Ca, in the form of an aq. soln. or an aq. slurry comprising particles of 100-mesh pass in size, is added from a tank 6 through a pump 5 so that the component A concn. is 2-200ppm (in terms of Fe2O3) and the component B concn. is 50ppm or less (in terms oxide). After blending, the blend is fed into a boiler 8 and burnt with a burner 7. The clinker ash thus formed is fed through a hopper 13 into a crusher 14, where the ash is crushed down. The crushed ash is fed through an ejector 15 and then through an ash treating pump 16, together with water, into a dehydrator tank 17 to conduct dehydration. On the other hand, exhaust gas dust is exhausted from a chimney through an air heater 10 and then an electrical dust collector 11.
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