A biomass boiler is a kind of boiler that can burn biomass as a fuel, converting the heat energy released by fuel combustion into hot water or steam. This kind of boiler can better utilize renewable energy resources such as biomass, and has good energy saving and environmental protection effects. However, the heating effect of the biomass boiler is affected by a variety of factors, this paper will explore the impact of these factors on the heating effect from the thermal power of biomass fuel, fuel moisture content, combustion air ratio, combustion temperature, combustion time and other aspects.
First, the thermal power of biomass fuel
The thermal power of biomass fuel refers to the combustion of biomass per unit mass of heat released, which is one of the important factors affecting the heating effect of biomass hot water boiler. Different biomass fuels have different thermal power, such as pine wood has lower thermal power than willow, eucalyptus and other hardwoods, and sawdust has higher thermal power than pellets. Therefore, when using biomass fuels should be selected and reasonably combined to utilize the energy of the fuel.
Second Fuel Moisture Content
The moisture content of biomass fuel is the percentage of the moisture mass contained in the fuel to the dry weight of the fuel, the higher the moisture content, the combustion process will need to consume more heat to evaporate the moisture, which leads to a decline in heating efficiency. Therefore, the moisture content of the fuel should be minimized to improve the heating efficiency of the biomass hot water boiler, but also to reduce heat loss.
Third, the combustion air ratio
Combustion air ratio refers to the amount of air required by the fuel and the actual combustion of the amount of air required by the ratio, usually expressed in terms of the theoretical air ratio and the actual air ratio. If the combustion air ratio is too high, the combustion process will consume more heat, thus reducing the thermal efficiency; if the combustion air ratio is too low, there will be incomplete combustion, resulting in a large number of smoke and hazardous substances, but also reduces the heating efficiency. Therefore, in the use of biomass fuels to ensure that the combustion air ratio of a reasonable match, in order to improve the heating efficiency of biomass hot water boilers.
Fourth, the combustion temperature
Combustion temperature is the average temperature of the fuel in the combustion process, the higher the combustion temperature, the fuel combustion of the heat energy released by the larger, thereby improving thermal efficiency. However, too high a combustion temperature can also lead to boiler flue gas emission temperature is too high, thereby increasing heat loss and soot emissions. Therefore, when using biomass fuel, it is necessary to ensure proper combustion temperature to improve the heating efficiency of biomass hot water boilers.
Fifth combustion time
Combustion time is the time used by the fuel in the combustion process, the longer the combustion time, the greater the heat released by the fuel combustion, thereby improving thermal efficiency. However, too long a combustion time will also increase the cost and time costs, not conducive to production. Therefore, when using biomass fuel, it is necessary to ensure that the combustion time, but also to consider the cost of production and production efficiency, in order to improve the heating efficiency of biomass hot water boilers.
