Extinguishing process

The fuel characteristics of biomass boilers are different from those of fossil fuels, which leads to the extinction mechanism of biomass fuels in the extinction process.

The reaction speed and the composition of the extinction products are also quite different from fossil fuels, which is different from fossil fuels. Extinguishing characteristics. As shown in the figure above, the extinguishing process of biomass fuel is mainly divided into the precipitation and extinguishing of volatile matter. The extinguishing and burning of coke are two independent stages.

The former accounts for about 10% of the extinguishing time, and the latter accounts for 90%. Detailed extinguishing The process is as follows: After the fuel is sent into the extinguishing chamber, under the action of high temperature heat, the fuel is heated and moisture is precipitated.

Subsequently, as the temperature of the fuel continues to increase, about 250 degrees Celsius, thermal synthesis begins, volatiles are precipitated, and coke is formed. The mixture of gaseous volatile matter and surrounding high-temperature air is first ignited and extinguished.

Under normal conditions, the coke is surrounded by volatiles, and the oxygen in the quenching chamber cannot easily penetrate the surface of the coke. As long as the extinguishing of the volatiles is about to end, the temperature of the coke and its surroundings is already high, and the oxygen in the air may also touch the surface of the coke. , The coke began to extinguish, and from time to time ash was produced.