Generally speaking, biomass fuels are divided into wood pellets and peanut shell briquette fuels.Regarding the problem of how to deal with ash, we analyze according to the above two categories.

1.wood pellets

The ash content of wood pellet fuel is generally 3%-5%, and the calorific value is calculated by 4000 kcal. A 1 ton boiler needs about 120-150 kg of pellets per hour, and 10 hours requires 1.2-1.5 tons of wood pellets. With 3-5% ash content, about 0.036-0.045 tons of ash will be produced, that is, 36 kg-45 kg for 10 hours a day. The amount of ash and slag is actually much smaller than that of coal slag. Generally, it can be used as an organic fertilizer or directly piled in an abandoned landfill. This amount of ash is not a problem.

2.peanut shell briquette fuels

The ash content of peanut shell briquette fuel is generally 10%-15%, and the calorific value is calculated by 3,500 kcal. A 1 ton boiler needs about 135-170 kg of peanut shell briquettes for 1 hour, and 1.35-1.7 tons for 10 hours. Calculated according to the ash content of 10-15% of the wood particles, about 0.135-0.202 tons of ash will be produced, which is 135 -202 kg for 10 hours a day. The amount of ash and slag is slightly more than that of particles, but it is still much less than that of cinder. Generally, it is also used as an organic fertilizer, or directly stacked in an abandoned landfill.

According to the above analysis, it is concluded that the biomass fuel has less ash compared to coal. The key biomass fuel is an environmentally friendly fuel. If you really want to have no ash, you can use natural gas as the fuel. The disadvantage is the high cost.