DESIGN AND FABRICATION OF BIOMASS FURNACE FOR FLUE GAS TO AIR HEAT EXCHANGER

Abstract

A hot air heat exchanger furnace that uses crop residue/ bagricultural residue as a fuel source is provided for producing the heat required for various purposes, such as the drying of grains, peanuts, soybeans, cassava and other materials. The furnace includes a combustion chamber, an upper manifold, two lower manifold  and a exhaust tubes. The exhaust tubes direct the flow of combustion gases from the combustion chamber in a serpentine path in the plenum between the upper and lower manifolds and into a stack. Meanwhile, ambient air passes into the plenum, past the heat transfer surfaces of the combustion chamber and the exhaust tubes as heat transfers to it. Then it passes out of the furnace. In addition to studying the authors present the results when changing the flow regime inside the tube by adding an "intervention tube" to the inside to increase heat exchange efficiency for an indirect incinerator with an indirect furnace using the thermal exchange with flue gas to air type. The experimental process has identified an energy-saving rate of about 20%; heat exchange efficiency increases by about 88%, heat capacity increases by about 56%.