What is the reason for the black smoke emitted by biomass burners?

What is the reason for the black smoke emitted by biomass burners?

Some customers may emit black smoke when using biomass burners for combustion, which will definitely be deemed unqualified by the environmental protection bureau. So what is the reason?

The main reasons for the generation of black smoke in biomass burners are biomass particulate fuel, biomass combustion conditions, and improper operation of biomass burners

1. Black smoke is caused by insufficient combustion of biomass particulate fuel, which is the reason why most biomass burners produce black smoke. Some manufacturers produce biomass pellet fuel burners with poor quality and unreasonable design, resulting in the combustion of biomass pellet fuel in the biomass burner. Burning biomass pellet fuel will produce gases such as carbon dioxide, sulfur dioxide, water vapor, oxygen, nitrogen, etc. Combustible gases such as carbon monoxide, hydrogen, methane, etc. It will also be produced. If biomass combustion is not sufficient, black smoke will be produced. These black smoke are actually combustible gases with calorific value. Insufficient combustion not only affects the environment, but also causes waste of biomass particulate fuel, increasing the operating costs of enterprises.

2. Improper air distribution operation during the operation of biomass particle combustion machine leads to low furnace temperature. The combustion of biomass particle fuel requires sufficient oxygen, so the air distribution of biomass burner is very important. Improper operation, low air volume, and insufficient oxygen supply can lead to the production of black smoke from combustion products.

3. Insufficient distribution of secondary air in biomass burners, or some simple burners do not have secondary air at all. Biomass fuel is first cracked and burned in a biomass burner, and forms a combustible gas with secondary air at the burner nozzle for secondary combustion. Therefore, if the secondary air is insufficient, it will cause incomplete combustion and black smoke.

4. Excessive moisture in the biomass particle fuel burned by the biomass burner can also produce black smoke, mainly due to the high water vapor in the early ignition stage, which makes the mixed flue gas easy to burn and not penetrate, resulting in black smoke.