Industrial production uses various furnaces, such as heating furnace, converter, reverberatory furnace, fluidized bed roaster, rotary kiln, etc. These furnaces all consume a large amount of fuel. Their thermal efficiency is very low, generally only about 30%, while the heat taken away by high-temperature flue gas, high-temperature slag, high-temperature products, etc. is up to 40-60%. The available waste heat accounts for about one third of fuel consumption in metallurgy, and more than 15% in machinery, glass, paper making, etc. The method of using waste heat boiler to recover waste heat has been widely used in various industrial sectors in the past 20 years.
Henan gas steam generator company The waste heat boiler (HRSG) refers to the boiler that uses the waste heat of waste gas, waste or liquid waste in various industrial processes and the heat generated after the combustion of combustible materials to heat water to working medium. Oil fired boiler, gas fired boiler and coal-fired boiler with smoke box and flue waste heat recovery are also called waste heat boiler. Waste heat boiler can produce hot water or steam for other sections through waste heat recovery.
Waste heat boiler is divided into oil fired waste heat boiler, gas fired waste heat boiler, coal-fired waste heat boiler and foreign medium waste heat boiler according to fuel. It can be divided into waste heat hot water boiler, waste heat steam boiler, waste heat organic heat carrier boiler, etc.
Henan Gas and Steam Generator Company The working principle of the waste heat boiler is that the high temperature flue gas generated by the combustion of fuel oil, gas and coal releases heat. The high temperature flue gas enters the furnace, then enters the waste heat recovery device of the front smoke box, then enters the pyrotechnic tube, and then enters the waste heat recovery device in the flue of the rear smoke box. The high temperature flue gas changes into low temperature flue gas and is discharged into the atmosphere through the chimney. As the waste heat boiler greatly improves the utilization rate of heat released by fuel combustion, it is more energy-saving.
