We chipped up enough pallets to fill two bins with nice wood chunks, however I still like to go through and sift out the bridges and small particles for consistency.
I'm shooting for .25-1.5 inches for the particle size distribution.
The first screen is to separate the larger chunks and the long splinters.
In order to keep the splinters from falling through, a quick popping motion on the vertical axis will keep them from rotating and falling through the cracks.
It is important to separate these longer splinters because they will bridge in the reactor typically over the reduction cone.
A second screen is used to separate the smaller particulates.
The smaller particulates tend to pack down and will require a greater pressure drop across the gasifier, and possibly even a smaller nozzle size to penetrate the bed of the combustion zone. Even though there doesn't seem to be a significant amount of smaller particulates in this batch of chipped biomass, it is always important to note the particle size distribution and packing tendencies when characterizing biomass.











