... with high quality; 3 delivery in time; 4 OEM offered Heating furnace/air furnacebrief introduction:Direct type air heater is by the ... diesel oil, heavy oil.3, gas fuel, such as: coal gas, natural gas, liquid gas. High temperature combustion gas got after the fuel combustion contact ... device, such as: coal burner, fuel oil burner, coal gas burner and so on. The application:1 chemical industry and ...