At present, many heavy industry industries in my country use biomass industrial boilers to replace traditional boilers. We know that the traditional boiler building not only emits pollutants into the atmosphere when burning, but also emits a lot of dust. So will there be dust in the biomass industrial boiler? Let’s take a look at it together.

Because of the high potassium and chlorine content in biomass industrial boilers, the ash after combustion contains a large amount of alkali metal salts, which is good as a fertilizer. However, due to the low melting point of these alkali metal salts during the combustion process, it is easy to be on the grate and water wall. As well as slagging and fouling on the heated surface of the tail, designers and operators should pay great attention to it.

When using the circulating fluidized bed combustion method, these potassium salts will react with the sand bed material or the soil (including sand) entrained by the straw to form potassium silicate-glass, which is likely to cause the bed material to coke or particles grow, so it should be timely during operation. Eliminate the large particles formed during the combustion process, supplement suitable bed materials, and maintain the relatively uniform particle size of the materials in the furnace.

Because the fuel used in biomass industrial boilers is different from traditional fossil fuels, the reaction speed of the fuel during the extinguishing process and the composition of the extinguished products are quite different from those of fossil fuels. The extinguishing process of biomass fuel is as follows: after the fuel is sent to the extinguishing chamber, under the action of high temperature heat, the fuel is heated to release moisture. When the temperature of the fuel increases to about 250°C, volatile components are precipitated and form coke. The gaseous volatile matter and the surrounding high-temperature air will first be ignited and extinguished. Because the coke is surrounded by volatile components, the oxygen in the extinguishing chamber of the biomass boiler cannot easily penetrate the coke. When the volatile components are about to be extinguished, the temperature around the coke is already very high, and the oxygen in the air may also touch the surface of the coke. Some ashes will be produced.