What is a Waste Heat Boiler?

Residual Heat BoilerAs one of our YikeNeng Boiler products, what exactly is a waste heat boiler?

A waste heat boiler, by definition, is a type of boiler that utilizes the residual heat and combustible substances from waste gases, materials, or liquids in various industrial processes to heat water to a certain temperature. Fuel oil boilers, gas boilers, and coal-fired boilers with flue and chimney waste heat recovery are also known as waste heat boilers. These boilers can produce hot water or steam through waste heat recovery. 

Fuel, gas, and coal combustion produce high-temperature flue gas, which releases heat. The high-temperature flue gas first enters the furnace, then the waste heat recovery unit in the front flue box, followed by the flue pipes, 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 released into the atmosphere through the chimney. Due to the significantly increased utilization of the heat released by fuel combustion in the waste heat boiler, this type of boiler is highly energy-efficient.

Heat recovery boilers are categorized by fuel type into oil-fueled, gas-fueled, coal-fueled, and external media heat recovery boilers. They are also divided by application into waste heat hot water boilers, waste heat steam boilers, and waste heat organic heat carrier boilers.