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Characteristics of biomass boiler flue gas

Time : 2021-05-11

After the biomass boiler flue gas investigation, testing, analysis, biomass boiler flue gas has the following characteristics:

 

(1) furnace temperature difference, biomass boilers are mainly grate furnace and circulating fluidized bed furnace, each furnace type is divided into medium temperature and pressure furnace, secondary high temperature and secondary high pressure furnace, high temperature and high pressure furnace, furnace temperature of 700~760℃, 880~950℃, 850~1100℃ respectively;

 

② The content of hydrogen element in biomass is high, and the water content in flue gas is also high.

 

(3) The mass fraction of alkali metals in soot is higher than 8%.

 

(4) The concentration of sulfur dioxide and nitrogen oxide is low and fluctuates greatly. When burning pure biomass, the mass concentration of sulfur dioxide and nitrogen oxide fluctuates between 100 and 250mg/m3. For example, when the template, wood and bark are doped in the fuel, the mass concentration of sulfur dioxide and nitrogen oxide in the flue gas fluctuates between 250 and 600mg/m3, and the instantaneous concentration can also reach more than 1g/m3.

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