openspaceman

I made a device to burn cleanings from the stables, worked well as the wood-flakes were reasonably dry. Dried dung cakes are a common fuel in the third world even if a bit wasteful of their fertiliser value.

Yes, this is why I burn pallets at home as those left lying around end up breaking up and shedding nails whereas cutting the stretches into 12" lengths for kindling and using the blocks as logs means the nails all stay in the stove and can be disposed in the dustbin. I once went through the site of a small, family, November 5th bonfire with a magnet and retrieved a wheelbarrow load of nails but I bet I missed half of them

Yes there were a couple of anomalies but on the whole it seemed good. Americans still don't like SI units! The 150% is when the percentage is given on a dry weight basis e.g. if you have a 1m3 solid log of beech freshly felled it will weigh near as damn 1 tonne. Of this 50% will be water so on a wet weight basis the log will be 500kg of water out of the 1000kg log so mc wwb =500/1000 =0.5 or 50%. Now if you dp the same calculation on a dry weight basis you take the mass of water divided by the dry mass of wood =500/500 or 100%. Do the same with a piece of pine at 60% mc wwb and you get 150% dwb. Dry weight basis is more used in the joinery trade.

I don't know which parts of the tree have chlorine compounds but it is going to be concentrated in the bark buds and leaves, I think hardwoods have more than softwood but don't know whether this is in foliage or when leafless. Some is likely from contaminants deposited from the atmosphere, salt could be one of them. I don’t see a ready path from common salt to dioxin at the temperatures in a hot water boiler, it is more likely formed in the incomplete secondary burn where a chlorinated hydrocarbon starts burning but finds another radical to make a dioxin. The way to avoid this is to reach higher temperatures to dissociate the molecule and allow HCl to form then quench rapidly but of course this is corrosive.

You didn't read my earlier post " high potassium and chlorine content in many biomasses" refers to things like miscanthus. Wood chip is a subset of biomass. Also they are talking about raising (and superheating) steam and it is at these high temperatures that the fly ash will firstly melt and then condense on the superheater tubes. Our domestic boilers have water at less than boiling in them.

Ex AMEC rail?

We had one, engine went at 150k. Traction can be a problem pulling away with a trailer and had a habit of lifting the back wheels off the ground and running away if stabiliser legs weren't used on the trailer as chipper was loaded.

Yes, simply because there is more ash in these parts of the foliage and bark than wood Well chlorine is an oxident so in that respect it doesn't burn but as its incidence in wood is less than .05% I doubt it is significant in corroding anything. Plastic coatings on the other hand do have lots of potential for forming acids, PVC will burn completely to form HCl which will combine with water and eat through stainless steel, incomplete burning gives dioxins.

Wood fibre (the white bits in the middle of the tree) has very little mineral content, as low as 0.5% of the dry mass and half of this is silica. The buds, leaves and bark contain ~8% by dry mass. Arable crops and grasses have much higher ash contents and also higher amounts of chlorine, their ashes also have lower melting points than wood ash and this is why they are more difficult to burn because the molten ash sticks to bits of the furnace as clinker (once it cools).

Chlorophyll contains no chlorine, it named from the Greek for green which in our alphabet is spelt chloros. There will be a small amount of chlorine ions is a tree and I guess they will burn to form dioxins but only a small amount.

News to me, how much chlorine and where is it in the brash?

Thanks Could well be, is there only one clip? The clip which is there on the pole side definitely has no tang. The current one is 44mm so are you saying the later FS420 one would be a replacement? It does seem to be readily available where the 44mm is not.

I get about 15 tonnes of assorted arbwaste logs into a roro bin. Technically you should not burn arbwaste apart from the site on which it is produced unless you are using it for heat. In practice very many do and at least the air curtain incinerator will be smokless. Alaska Environmental hire one out with a 360 but I don't know the costs. I'd be tempted to make something a little smaller and run it more frequently.

Are there any 3.5 tonne trailers that weigh 800kg unladen? I know our ifor triaxle weighs 900kg. I considered a swan neck or 5th wheel trailer for my 110 but never did figure out the legalities and payload.

I used to, low compression model, ran at best 19mpg on petrol and 14 on lpg, range on lpg was 150 miles. Mine would be pants compared with a tdi as it only had about 110bhp but it was adequate and much lower engine service costs I did about 60k miles in it.

2-300hp Somewhat less 50hp Can of worms, will it be covered by agricultural or forestry exemption AND/OR only moving tools of trade to these or horticultural work? 30hp and wear and tear ( especially glazing bore) on large tractor plus fuel consumption will put costs up.

I doubt that can happen but my original one was close spelling to another. I'll bet you're confused by the bit of php script in the "how's work" thread which personalises what we each see with our usernames.

I would also like to know. I always considered it risky to carry on cutting hard once the saw showed signs of running out simply because revs go up and the leaner mixture runs hotter.

Can anyone help with some part numbers? I have found a Meteor kit for a 460 but the bore is 46mm, I have measured my FS360 at 44mm. Are the pot and piston off the later model interchangeable?

Thanks? Worth looking at for the towing capacity

Any idea of the kerb weight of the double wheel version?

I'd be interested in a price for it tipped in Black Dog

What's the attribution for the graph? There are a couple of points from this, one being that even though an equilibrium will be reached given sufficient time at low temperature much more air has to pass over the log. The other that drying below 15% is wasteful and EMC can regulate this. The thing about wood below the fibre saturation point is that there is shrinkage and swelling as moisture content changes, different woods behave differently. In general there is little length change, most change is tangential to the grain and it is this that is causing cracks to open and close

I don't think we disagree on anything here. The question then is why do you want to dry stuff? Air (=solar power) drying is the most economical and seems to be the way many woodchip suppliers are going (stacking partially debarked roundwood and then chipping into dry storage). Has anyone a link for the LENZ system to save me unfruitful googling? Farmer Rod was chipping into a barn and then shovelling it about to expose fresh surfaces, I don't know what mc he got down to. Chip in a covered heap will dry but you must prevent the rising moisture condensing in the upper layrs re wetting. An earlier poster suggested a figure of £9/tonne but did not specify the before and after mc, we aimed for £10/tonne water removed in 2002.One of the big costs with the drying floor was the higher fan costs because of higher back pressure from chip compared with grain which is more uniform but this was not my field, we were drying logs which presented different problems. Chip looked easier because of the quicker throughput and consequential lower system losses. BTW creosote is a result of pyrolysis, the gunk in a chimney is a mixture of condensed tars and PICs and if the burn is clean they don't get produced. BTW2 openspaceman is a play on Viv Stanshall's song.