Solid fuel boiler is very welcomed, the fuel can be biomass pellet, wood pellet, coal fuel, etc. Understanding how a solid fuel biomass boiler works boils down to understanding the fuel and the combustion process as well as the equipment that controls how the fuel is burned. Improper operation can lead to unwanted maintenance time and frustration for the owner of the boiler. On the other hand, when operated properly, solid fueled boilers can be very reliable, consistent, and cost effective.

Solid fuel boiler system principle
A solid fuel boiler system lives and dies (so to speak) by the flow of fuel into the furnace. Boilers that have the most problems are ones that do not have very good control over how uniform and consistent this flow is. This principle is even more important in applications with frequent load fluctuations. The system must harness control of the fuel input because even a slight interruption of supply can cause a disturbance in the load. The metering of fuel into the boiler has to match the load requirements or the process will not be in equilibrium. It may help to see the fuel as an ingredient which, along with the under-fire and over-fire air (discussed later), produces the energy.

With solid fuels, there is almost always an array of particle sizes in Indonesia. Because of this disparity of fuel size, the metering of the fuel must keep the flow in constant turbulence so that the different sizes will not separate themselves. If a trend of separation occurs, the furnace bed will not be uniform and the burning will be biased toward certain areas. A uniform consistency of fuel will make for a larger surface area of burning and prevent hot spots and dead air zones within the furnace.

Using a fuel transfer and metering system which implements augers to transfer fuel is an effective way to precisely control feed rates as well as maintain a consistent mixture of fuel sizes.
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