... , cracked stove, roaster, melting furnace, hot stove, oil gas boiler, etc. This technology is to make two regenerator ... change device, recuperate the heat of the exhaust gas to the maximum extent, and then heat the ... the inferior fuel (e.g. the blast furnace gas ) of lower calorific power can also catch fire ... than 100ppm, and make the temperature of exhaust gas emission lower than 160°C. It will reduce ...