Grinding Biomass in Coal Grinders
Grinding Biomass in Coal Grinders
(OP)
Good morning folks
We are having difficulty with grinding wood pellets in an existing coal grinder. Is there a resident expert that can chat?
Thanks
We are having difficulty with grinding wood pellets in an existing coal grinder. Is there a resident expert that can chat?
Thanks





RE: Grinding Biomass in Coal Grinders
-handleman, CSWP (The new, easy test)
RE: Grinding Biomass in Coal Grinders
What type of coal mill are you using? Are you milling the wood pellets with coal, or by themselves? I would be happy to help if I can. Depending on the type of mill, there may be some fairly simple adjustments that will improve performance.
Regards,
John
RE: Grinding Biomass in Coal Grinders
It is a verticle, 2 roller mill. We will be slowly blending in wood pellets.
RE: Grinding Biomass in Coal Grinders
Here is a paper that talks about co-firing and co-milling coal and wood pellets:
Link
There are many other articles and papers about this subject out there as well.
Let us know how it goes. I'm interested to hear more about your particular experience.
RE: Grinding Biomass in Coal Grinders
there is indeed evidence and proof that co-firing biofuel with coal leads to a very much increased risk for dust explosion hazards, especially in the milling part of the plant. There are several studies made and papers presentedd where this is addressed and where the need for dust explosion prevention and protection is highlighted.
Especially when adding more then 10% biomass there is a steep risk increase, this has for example led to the mandatory inclusion of explosion protection measures in many affected power plants in Europe