SZL furnace pre assembled biomass boiler

Pre furnace assembled biomass boilers are suitable for fuels such as straw and other biomass materials, as well as formed biomass fuels; The fuel size generally requires no more than 50 × 30 × 10mm (length × width × thickness) or rod-shaped fuel with a diameter of mm × 30 × 50 (length × diameter), allowing a small amount of length of 50-100mm. The total moisture content is generally required to be no more than 25%, and the maximum is no more than 30%. For pressed fuel, the size is generally required to be no more than 30 × 30 × 10mm, and the total moisture content is generally required to be no more than 15%. This type of boiler can use chain grate or reciprocating grate depending on the fuel. Special design: 1. Furnace and secondary air: Due to the low density, low calorific value, high volatile matter, and high moisture content of biomass fuel, biomass boilers are significantly different from general coal-fired boilers. Firstly, there must be a large combustion space and sufficient height to allow sufficient combustion time for the fuel in the furnace. At the same time, sufficient secondary air should be arranged in layers at a certain height in the furnace to adapt to the concentrated release and combustion of a large amount of volatile matter, ensuring that combustibles are fully mixed with air for combustion, and combustibles can be burned out in the furnace. 2. Arrangement of heating surface and soot blower: Due to the high content of K and Cl in biomass fuel, the ash after combustion contains a large amount of alkali metal salts such as KCl and KCO3. These salts have a low melting point and are prone to accumulate on the heating surface. This requires a different arrangement from that of a typical coal furnace when designing the heating surface to reduce ash accumulation structurally. At the same time, these ashes have strong adhesion and are difficult to remove with conventional sonic soot blowers. Therefore, steam soot blowers should be arranged at appropriate locations in the boiler. In addition, due to the presence of Cl in biomass fuel, it increases the tail heating .....