Heat Recovery Boilers, as the name implies, are boilers that utilize the waste heat and combustible substances from industrial processes, such as waste gases, waste materials, or waste liquids, to heat water or thermal oil to a certain temperature. They are categorized into Heat Recovery Thermal Oil Boilers, Heat Recovery Hot Water Boilers, and Heat Recovery Steam Boilers. Heat Recovery Boilers can produce hot water, thermal oil, or steam for use in other sections through waste heat recovery.

Principle of Waste Heat Boiler Operation

Fuel, gas, and coal combustion generates high-temperature flue gas, which releases heat. The flue gas first enters the furnace, then the waste heat recovery unit in the front flue box, followed by the smoke tube, and finally the waste heat recovery unit in the flue channel of the rear flue box. The high-temperature flue gas is converted to low-temperature flue gas and discharged into the atmosphere through the chimney. Due to the greatly improved utilization of the heat released by fuel combustion in the waste heat boiler, this type of boiler is highly energy-efficient.