A customer asked before, why is it not to directly burn straw, firewood, etc., but to allow burning biomass pellet fuel? What is the difference between the two? Next, the tony biomass pelletizer manufacturer will solve the problem for everyone.
The following fuels or substances are highly polluted fuels: raw coal (pine) coal, coal gangue, pulverized coal, coal sludge, fuel oil (heavy oil, residue oil), various combustible waste and biomass fuels (direct utilization of slags, trees, straw, sawdust, rice husks, sugarcane, etc.).
Judging from the combustion characteristics of firewood:
(1) Drying stage: In the late stage, the moisture of firewood continues to evaporate with combustion. When the temperature reaches about 100 degrees Celsius, the moisture evaporates rapidly until the firewood is dry.
(2) Pyrolysis stage: After the wood is dried, it begins to pyrolysis and releases volatile gases. The hemicellulose in wood begins to decompose when the temperature reaches 150-180 degrees Celsius, and the cellulose and lignin begins to decompose when the temperature reaches 280-350 degrees Celsius. The decomposition begins, and the volatile substances decompose and precipitate. The residue contains the tar below and a large amount of charcoal. (3) Ignition and combustion stages of volatiles. Volatile substances include flammable gases and non-flammable gases. During the continuous heating process, the chemical reaction between combustible substances and oxygen accelerates sharply, forming a bright yellow flame. When volatiles are burning, since oxygen is difficult to spread to the surface of charcoal, charcoal can only be heated but not burned.
(4) During the combustion stage of charcoal and heavy hydrocarbons, when the volatile substances are basically burned out, oxygen diffuses to the surface of the charcoal and starts to burn, and a blue flame is emitted. The temperature at this time is about 500-580 degrees Celsius. Heavy hydrocarbons start to burn at a temperature of 780-850 degrees Celsius.
(5) During the burnout phase, when charcoal and heavy hydrocarbons are burned, the remaining substance is ashes. Because the coke is wrapped in ash, it is difficult for air to penetrate into the outside of the coke, so the coke is more difficult to burn out and the residual carbon is left.
Biomass pellet fuel combustion:
Biomass forming fuel is a biomass fuel made of combustible herbs or wood raw materials and is processed through biomass pellets. Through the control of the production process and production links, the combustion process does not produce smoke and dust and does not pollute the atmosphere
There is an essential difference between biomass fuel and biomass pellet fuel.