Woodfuel Chipper

[Arran Woodfuels]

once thats browned, the chemical composition changes and it becomes safe to burn in boilers

 

Thanks for that, Mr.Ed, and it confirms what Buzz mentioned further up in the thread.

 

I think the point I am trying to make is that if you sell woodchip as a biomass fuel in accordance with the BSI standard (as we do), then including brash in the mix can have quality implications. Selling to CHP plants, say over 5mW, in quantities of over 50,000 tonnes per year, well that is a different matter on quality and specification of chip. At these quantities, one wouldn't be asking for advice on a Heizohack HM 4-300.

[renewablejohn]

The reason for the lightweight chipper is so that we can get into the woods with lightweight equipment and do less damage by chipping at the point of brash rather then dragging the brash out in bundles and then chipping.

[Sawtooth]

The FC lets Tillhill bail 80 % of brash on sites where the harvester forwarder does not have to run on brash mats.

 

That doesent make any sense

The forwarder and harvester always run on the brash.

There is no way around it.

Brash can be collected up later or if its going to be bailed all brash timber should be cut to 1m or less.

By not using brash under the machine all you would be doing is damaging the ground and your tyres.

But interestingly do the FC leave 20% to degrade back in to the ground?

[Arran Woodfuels]

we can get into the woods with lightweight equipment and do less damage by chipping at the point of brash rather then dragging the brash out in bundles and then chipping.

 

Yes, I see your point, and a good enough idea.

 

We are actually considering chipping brash/waste for non-fuel purposes, and I'm interested to hear if you consider the machine extracting the bulk chip would cause less damage than, say, a forwarder extracting the brash for chipping at roadside?

 

Our head forester understandably wants the brash mats left, however there are thousands of tonnes of other timber waste material in there and I was thinking along the lines that only a forwarder could go in and extract. I hadn't really considered sending the chipper in as an option.

 

Bearing in mind we are talking about areas of peat bogs, etc, which may be the extreme.

[Buzz]

Harvester Forwarders do not always run on brash mats it depends on the site and the clients.

 

In N Wales for example due to the fragile ground most sites are run on brash mats.

 

In the SE on the sand etc brash mats aren't required.

 

Chipping at stump works well on some sites, usually clearfell, chip forwarders are big heavy machines and only work well with a chip shuttle unless the extraction route is very small.

 

Unless your being paid to chip the brash you won't make it work with a small chipper and a tractor trailer chip shuttle.

[renewablejohn]

We intend using the forwarder with IBC containers for extraction of woodchip from the forest to the main road then using a pallet rotation fork on a loader tip direct into artics for onward transportation. Similar technology used for handling potato boxes out of a muddy field.

[firewoodman]

Junkari chippers are made out of tin foil !!

 

Must be a problem with your chipper as i have used most biomass chippers and have found this and the dynamic conehead the best chippers and brash.

 

sorry buzz, i should've mentioned that i crane feed the brash in, so we do stuff the opening quite full.

 

there is no problem with the machine, it just should not be crane fed!

 

excellent machine for biomass. paid £18000 new.

 

there was one in forestry journal for sale

[brasher]

We intend using the forwarder with IBC containers for extraction of woodchip from the forest to the main road then using a pallet rotation fork on a loader tip direct into artics for onward transportation. Similar technology used for handling potato boxes out of a muddy field.

 

Thats interesting, what output do you think or hope you will achieve with this method? also what kind of trailers will the artics be using-- bulkers or walking floor?

[Mr Ed]

We intend using the forwarder with IBC containers for extraction of woodchip from the forest to the main road then using a pallet rotation fork on a loader tip direct into artics for onward transportation. Similar technology used for handling potato boxes out of a muddy field.

 

Good luck with that....

[renewablejohn]

Thats interesting, what output do you think or hope you will achieve with this method? also what kind of trailers will the artics be using-- bulkers or walking floor?

 

Output depends on resources but you could go OTT like a farm silage operation with output dependent on the speed of the chipper. In reality we would want to keep the bulk tipper working to full capacity which obviously is dependent on haulage distance.

As for trailers I think you will need bulkers as the material can be difficult to extract out of a walking floor.