How to improve the CFB boiler efficiency?

a. Add the economizer on the CFB boiler

The economizer of condensing gas-fired boiler can be installed in the flue of the current CFB boiler, to recovery the energy from the high-temperature flue gas, in order to reduce the fuel consumption. Also, the economizer helps to absorb the air pollutants such as the NOx and sulfur dioxide.

b. The waste heat recovery system could be used on the CFB boiler

The exhaust gas temperature of the traditional boiler is around 160 to 250℃, the steam in the flue is still superheated, it is impossible to condense into liquid water and release latent heat of vaporization. Boiler thermal efficiency is calculated according to the low calorific value of fuel, without considering the heat loss of latent heat of vaporization when the fuel has a high calorific value. Therefore, the thermal efficiency of traditional boilers can only reach 87℃ to 91℃. The waste heat recovery system can reduce the exhaust gas temperature to 50℃ - 70℃, fully recover the sensible heat in the flue gas and the condensation latent heat of steam and improve the thermal efficiency of CFB boiler.