Although biomass briquette fuel produced by briquette machine has little black smoke when burning compared with straws, some customers report that biomass boiler often emits black smoke after being used for a period of time. What’s going on?

There are many reasons for the black smoke when biomass briquette fuel burns:

1. Biomass briquette fuel has poor quality and contains many impurities.

2. Boiler feed is too fast, combustion is insufficient, and support is insufficient.

3. The furnace ash has not been cleaned.

4, The use time is long, and the smoke pipe is blocked; The chimney installation is unreasonable and the flue resistance is high.

5. Black smoke from the boiler may also be caused by insufficient air volume and low temperature in the furnace.

6. There are some dual-purpose boilers burning coal, but burning coal in the early stage，and then burning biomass briquettes will not work. Black smoke shows that the combustion is insufficient, the air distribution in the secondary air system is improper, and the boiler is old.

How to deal with the black smoke from biomass boilers?

1. Purchase qualified biomass briquette fuel.

2. When feeding the boiler, it should be reasonable, and don’t add too much material, which will cause the fire pressure and the fuel can’t burn fully.

3. Clean the furnace ash in time.

4. Clean the smoke pipe to prevent blockage; When installing the chimney of the boiler, ensure that the structure is reasonable and conductive.

5. Try to increase the air volume and the temperature in the furnace.

6. Timely and appropriate air supply operation, make the oil mist and air normal fusion, prevent local hypoxia. The boiler needs to be rebuilt or renewed.