Fuel: Husk, solvent extraction spent, tamarind shell and seed, pulverized coal, pellets etc,. Is a shell and tube type boiler consisting of a plain cylindrical furnace attached to a reversing chamber in the 1st pass and the 2nd and 3rd pass constituting of tube nests. Heat recovery unit (optional SALIENT FEATURES Large heating surface areas. Large furnace and grate areas. High efficiency. Optimum exhaust gas temperatures. Optimum fuel to air ratio