XINLI BOILER

How to reduce nitrogen oxide emissions from biomass boilers?

03 Nov, 2021

　　When a good biomass boiler equipment burns biomass fuel, the gas emitted is transparent, there will be no dense smoke, and there will not be a lot of nitrogen oxide emissions. In fact, as long as the quality of the biomass fuel is satisfactory and the combustion control of the biomass boiler is in place, the gas emissions can be monitored by environmental protection. Even if there is time when the fuel cannot be fully burned, we can take some measures to reduce the biomass. Boiler nitrogen oxide emissions, then, how to reduce nitrogen oxide emissions from biomass boilers?

　　The method for reducing nitrogen oxide emissions from biomass circulating fluidized bed boilers includes the following steps:

　　1) The flue gas discharged from the fluidized bed boiler is introduced into the dust collector, and most of the dust impurities are removed to obtain a cleaner flue gas;

　　2) A part of the obtained relatively clean flue gas is introduced from the primary air inlet of the fluidized bed boiler to the primary air chamber for circulation to reduce the oxygen content of the primary air, thereby reducing the furnace combustion temperature of the fluidized bed boiler;

　　3) At the same time, spray the denitrification reducing agent into it from the secondary air inlet of the fluidized bed boiler, and use the secondary air to make the atomized denitrification reducing agent fully mix with the flue gas in the furnace, and then make the Nitrogen oxides are removed by chemical reaction with denitrification reducing agent. The process of the method is simple and practical, does not require major transformation of the biomass circulating fluidized bed boiler, has low investment cost, and has a significant effect of reducing nitrogen oxide emissions.