![]() ![]() Perhaps the OP is more concerned about what his neighbours will have to breathe in than any possible consequences for his chimney! There are cases I'm sure where sending to landfill or industrial incineration would be preferable. No problems with the flue when mixed with other well seasoned wood. ![]() Also, if each plank contains a skin 5mm thick of mortar then that would have to be taken into account too. Also, need to find out cost of getting them – a 4 metre plank won’t fit into my car so I’d have to hire a van. See if I can get a sample and whether they want me to take all of their waste – that would be far too much for me – I’d have to find a disposal route – we are talking thousands of boards. Onto my scaffold planks – I’ll contact the company trying to get rid of them. Again, this is from websites so may not be true. From the literature available for a gasification boiler – it states that they operate up to a flue gas temperature of 1200 degrees C. From my Googling, it appears that this is still the case. Onto the operating temperature of a waste incinerator – from my university studies that I did many years ago the requirements are that they should operate so that the flue gases stay above 800 degrees C for two seconds. I am now thinking that that may have been a wrong decision to make and that the wood would have been useful. I have turned that wood down as it contains preservative. I have been offered in the past wood from two fencing companies. Also, what contaminants would the ash contain? Even if old fashioned tanalised wood was used with arsenic – would this be released up the flue of would it go into the ash? If in the ash, would it get ingested by someone cleaning out the ash? Would breathing in carbon dust in general be bad for one’s health so would the use of a face mask be wise? So, if we go down to emissions from a boiler – what would they be from wooden scaffold planks or, indeed, any wood that is classed as tanalised? Not sure if scaffold planks are tanalised. I could hunt out a link that I found with that information but, again, that is simply information on a commercial wood preservative website and it didn’t look to have any scientific backing. Likewise, using for children’s play equipment may cause transfer onto hands which, if not washed before eating food, could cause arsenic to be ingested by children. Certain websites state that arsenic is dangerous as a wood preservative if ingested so, using old fashioned tanalised wood close to a vegetable plot – or maybe against a lawn where the clippings are used for compost could cause ingestion, could be harmful. ![]() In fact, with regards to the old tanalised timber which I believe is not allowed for normal use where is may contaminate the soil, what would be the danger from the arsenic in the preservative. Which states that up to half a tonne of wood can be burned at once in the open and that the resultant ash is non-hazardous. One of the many links that I found regarding burning treated wood is this: Other links suggest that the wood is treated with copper and modern Triazole Biocides – not sure if these are different from old fashioned triazole biocides. However, when we (here on this forum, on other forums and in general) talk about tanalised wood, what are we actually talking about? Is it the old tanalised wood that contains Copper, Chrome and Arsenic or the new Tanalith E which, IIRC, contains Copper and Boron. There is no temperature at which a poisonous heavy metal like arsenic is rendered harmless. Industrial incinerators operate at far higher temperatures than those achievable Was the first of nearly 2 million results for a simple google search. These will also be concentrated in any ashes. Pressure treated with copper chrome arsenate.īurning tanalised timber will release into the atmosphere Mespilus wrote:Timber used to be 'tanalised'. If there is cement on the wood you will be sharpening your chainsaw after every cut. I may try to get a sample of a plank or two and see what they look like when cut. So, based on that, do you reckon that they would be suitable for use in a high temperature boiler (1000 degrees plus)? I reckon that I'd have to clear the ash out a bit more than on virgin wood but I do like the idea of recovering heat from waste products rather than from virgin wood. I imagine that a good hit with a hammer would dislodge most cement but there would likely be some that soaks into the grain. I have not seen the planks yet but I imagine that they would be covered in cement, splodges of paint and other stuff - as well as a strip of metal on the end. These, if suitable, would be used in a gasification boiler. I have the chance to obtain a load of scaffold planks - and I mean a load - probably enough to heat my home for a year or two. Biogas Bottom wrote:Anyone here ever burned used scaffold planks? ![]()
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