With the increasing global attention to the importance of clean energy, biomass boilers have been widely used as a new type of green energy equipment. As an essential fuel for boilers, biomass comes in various types and has different requirements for fuel. Let's take a detailed look at the fuel requirements for biomass boilers.
1, Heating value
The calorific value of the fuel selected for biomass boilers must match its design parameters. Generally speaking, the design of biomass boilers requires a fuel calorific value between 12-18MJ/kg. If the fuel calorific value is lower than this range, not only will the combustion be incomplete, but it will also lead to a decrease in boiler efficiency and excessive waste gas content generated during combustion; If the calorific value of the fuel is higher than this range, it will cause an increase in the temperature of the boiler heating surface and exacerbate equipment damage.
2, Moisture content
The moisture content in biomass fuel must be within the normal range. If the moisture content is too high, it will lead to incomplete combustion, and the exhaust gas will contain a large amount of gas, dust, and particulate matter, which will also affect the thermal efficiency of the boiler; If the moisture content is too low, it may cause overheating during combustion and exacerbate equipment damage. Generally speaking, the moisture content of biomass fuels should be controlled between 10-50%, among which the moisture content of fuels such as sawdust, sawdust, and straw should not exceed 30%.
3, Ash content
The ash content in biomass fuel is also an important factor to consider when selecting fuel for boilers. Excessive ash content may not only affect combustion, but also cause damage and corrosion to boiler steel. The ash content in biomass fuel should be controlled between 6-20%.
4, Granularity
The pre-treatment methods and particle size requirements for different biomass fuels vary. For example, fuels such as straw should first remove impurities and be crushed to a suitable particle size of 2-3cm; Sawdust, sawdust and other fuels are suitable for crushing to a particle size of 2mm-5mm.
In summary, the requirements for fuel in biomass boilers include multiple factors such as calorific value, moisture content, ash content, and particle size. Choosing the appropriate fuel can make the boiler operate more stably, improve efficiency, and reduce damage. When selecting and using biomass boilers in practice, careful selection should be made based on the specific parameters of the equipment, as well as the type and characteristics of the fuel.
