The biomass pellets used in the biomass pellet boiler are fuel pellets processed by sawdust pelletizing machinery using wood chips, straw, rice husks, bark and other raw materials.
As a new type of pellet fuel, biomass pellets have won wide recognition for its unique advantages. Compared with traditional fuels, it not only has economic advantages but also environmental benefits, and fully meets the requirements of sustainable development.
The
Wood Pellet Mill can use the wastes of agricultural and forestry processing such as wood chips, straw, rice husk, bark and other biomass as raw materials, and through pretreatment and processing, it can be solidified into high-density pellet fuel, which is an ideal fuel to replace kerosene. , which can save energy and reduce emissions, is an efficient and clean renewable energy.
Biomass pellets can be used instead of coal, and biomass pellets can be used as long as coal-using enterprises and biomass pellet boilers.
The shaped pellet fuel has a large specific gravity, a small volume, and is resistant to combustion, which is convenient for storage and transportation. The volume after molding is 1/30~40 of the volume of the raw material, and the specific gravity is 10~15 times that of the raw material (density: 0.8-1.4). The calorific value can reach 3400~6000 kcal.
Biomass particles with smooth surface, high density and no cracks are suitable products. If the combustion is not sufficient, the cost is very high, how can it be fully burned? What are the conditions for the full combustion of biomass pellets? Below, our Kingoro pellet machine manufacturer will find out the answer for you.
1. High enough temperature
The temperature is high enough to ensure the heat required for ignition while maintaining an effective burn rate.
The ignition point of biomass pellet fuel is about 250°C, and the increase of its temperature has the follow-up fuel supply with good combustion. During the ignition process, the heat gradually accumulates, so that more fuel participates in the reaction, and the temperature also increases. When the temperature reaches 800°C Above, biomass will be able to burn well.
2. Appropriate amount of air
If the amount of air is too small, the combustible components cannot be fully burned, resulting in incomplete combustion loss;
However, if the air volume is too large, the temperature of the combustion chamber will be lowered, which will affect the degree of complete combustion. In addition, it will cause a large amount of flue gas and reduce the thermal efficiency of the boiler.
3. Sufficient burning time
The fuel burns at a certain speed, and it takes a certain amount of time to achieve the maximum degree of combustion so that the combustion is complete. The biggest problem in combustion adjustment is to keep the residence time of combustion in the furnace as much as possible. With enough combustion time, complete combustion can be achieved.
4. Timely mixing of oxygen
The primary air is enough to blow and penetrate the stirring fuel; the secondary air is strong and fast, and there should be no lack of oxygen in the combustion center where the combustion is the most violent, and sufficient oxygen should be maintained in the burn-out area in the upper part of the furnace (the upper secondary air should be opened as much as possible, Taking the three-stage superheater not to exceed the temperature as the use boundary, after the center of the flame in the furnace, a successively weakened temperature field is formed).
During the combustion process of biomass pellets in the biomass pellet boiler, as long as the above four points are satisfied, it can be fully burned. Sometimes when we encounter a problem, we should not only think that it is the problem of the product, but also analyze our own situation. Only a multi-faceted inspection can really solve the problem.
The choice of pellet mill and the quality of biomass pellets will affect the service life of biomass pellet boilers.
Shandong Kingoro Machinery Co., Ltd
June 16, 2022
