... machine is energy-saving, environment friendly machine, during the process it just generates less waste (sludge), the waste (Sludge) doesn ... will produce different density diesel fuel oil. 2, HCY Heating device are optional, there are oil-burner furnace, natural-gas furnace ... a Pyrolysis way. 4, HCY machine is friendly environment, it produces less sludge, the sludge is purity carbon materials without ...