... accumulating type heater exchanger, design for ceramic mesh two burners combustion, by reversing valve alternately. For gas, dust, low ... high impurity, can be used to design for three burners combustion system.2) using double preheating of air, gas, while preheating, ... guarantees the complete combustion, and reduce the harmful gases.4 product performance1) gas: suitable for blast furnace gas and coke- ...