... in the flue gas combustion air preheater, not only to save energy and reduce the gas, etc, and the industrial ... of air, gas, while preheating, effectively improve combustion temperature, to save energy.3) diffusion flame combustion burner for structure, air and ... heat exchanger, flue gas discharge temperature of < 100°C, usually can save energy by 50%, shorten curing time, and half the uniformity ...