禁止原煤直接燃烧和淘汰小锅炉,控制燃煤工业锅炉SO_2污染——中国燃煤工业锅炉SO_2污染综合防治对策(三)

Forbidding direct burn of raw coal and eliminating industrial boiler of smallcapacity to control sulfur dioxide pollution

禁止原煤直接燃烧和淘汰小锅炉,是控制燃煤工业锅炉SO2污染最有效、最简便的首选方法,这是由于原煤的灰分和硫分高,末煤量高、水分不适宜、粒度不符合要求,燃烧时排放出大量的烟尘和SO2,还会降低锅炉的热效率。小容量的锅炉,因炉膛小,燃烧方式落后,供氧不充分,空气和煤炭接触不充分,烟气停留时间短,燃烧不充分,会产生大量烟尘和降低锅炉热效率,煤炭资源利用率低。禁止工业锅炉原煤直接燃烧,改烧经洗选、加工、成型、转化后的洁净煤制品,锅炉热效率可明显提高,烟尘和SO2污染也会得到控制,实现经济效益和环境效益双赢。

Forbidding direct burn of raw coal and eliminating industrial boiler of small capacity are the most effective and simple measures to be firstly selected to control sulfur dioxide from industrial coal-fired boilers. Because the ash and sulfur contents in raw coal are higher, a vast amount of dust and SO_2 will pollute the air and decrease heat efficiency of the boiler. Prohibiting direct burn of raw coal and burning clean processed products can achieve a good benefit in economy and environment.