Containing both parallel-flow and counter-flow in the same shaft Capacity: 100 ~ 600tpd, mostly 200~400tpd BBK, 500~600tpd ASK, 100~200tpd PBK Fuel: applicable to various fuels for BBK, gas only for ASK and PBK; no HV limit Active lime: good quality, activity 300~380ml, ASK＞BBK＞PBK Stone: only suitable small-medium crystal particle
