... ,chain furnace,heating furnace,reciprocating grate,pulverized coal furnace,oil furnace,cupola,incineration furnace,forging furnace,boiling furnac-e. ... manufacturing,all furnaces,boilers and castings.4.The after-purifying gas of all poisonous and harmful gas,lampblack,acid ... smell,etc can meet national emission standard. 5.The purifying equipment applied to all kinds of dust-containing gas in all ...