Biomass boiler - floor drier - waste paper

Chippy · May 20, 2016

I've got a 185kw dragon boiler and I'd like to start drying around 300 tonne of waste paper for bedding my cows cubicles and the occasional load of wood chip or sawdust. Drying floors seem the cheapest solution but I've no experience with them. What types of floor do people recommend. I have option of building it in existing shed or building new shed. Ideally an artic wagon would deliver wet paper and dump it straight onto the drying floor with a walking floor and then I'd spread it around with jcb if that's possible?

Iron150 · May 20, 2016

Ive put a phew photos on the photos section of one we are building for wood chip now

Chippy · May 22, 2016

Must be some more people with some opinions? More pictures of completed ones would be nice

potter · May 23, 2016

Chippy said:
I've got a 185kw dragon boiler and I'd like to start drying around 300 tonne of waste paper for bedding my cows cubicles and the occasional load of wood chip or sawdust. Drying floors seem the cheapest solution but I've no experience with them. What types of floor do people recommend. I have option of building it in existing shed or building new shed. Ideally an artic wagon would deliver wet paper and dump it straight onto the drying floor with a walking floor and then I'd spread it around with jcb if that's possible?

We have a 450 Kw Dragon and use 400 kg linseed straw bales to dry 2000 tonnes of wheat each year, with the wettest year at 25% in and 15% out. This is on a Challow wooden floor. In the photo of the building you can see the internal tunnel.

.

frustratedfarmer · May 23, 2016

Out of curiosity how many kWh Do you get from a 400kg bale?

How big is your buffer?

potter · May 23, 2016

I have no idea of the kwh of linseed straw as I have no heat meter or buffer, just the 4000 lts of water around the water jacket and the pipework plus the two heat exchangers that are 8ft x 4 ft each stacked ontop of each other. We burn nearly 3 bales every 24 hrs and use approx 60 bales a season to dry 2000 tonnes of wheat. I estimate that the straw costs us about £650 rather than £6500 of lpg gas. No RHI or subsidy but paid for itself after 3 harvests.

ConMag · May 25, 2016

Chippy said:
Must be some more people with some opinions? More pictures of completed ones would be nice

Just wondering, have you considered using the Spanwright Ventilated Concrete Drying Floor solution? Might give you more options for drying woodchip, grain, straw, paper etc...tel 07702497123. I have attached a few photos of one in operation - woodchip drying.

Wastexprt · May 25, 2016

Be careful, you've mentioned the word 'waste'. As you will be treating a waste material (the waste paper) this opens up the very real possibility that you will need to be covered by a waste permit. The waste producer, from a duty of care perspective, must also ensure that wherever they send their wastes must be covered by the correct permit/exemption.

frustratedfarmer · May 25, 2016

@360farmsupport do you know if this applies to bailed cardboard from someone like buffs waste for example?

Wastexprt · May 27, 2016

frustratedfarmer said:
@360farmsupport do you know if this applies to bailed cardboard from someone like buffs waste for example?

In what regard? I'm afraid it depends on what you are doing with it and how you will use it. It may be that the activity is covered by an exemption but it's difficult to say without some details.

Matt · May 27, 2016

ConMag said:
Just wondering, have you considered using the Spanwright Ventilated Concrete Drying Floor solution? Might give you more options for drying woodchip, grain, straw, paper etc...tel 07702497123. I have attached a few photos of one in operation - woodchip drying.

Can these stand logs been tipped out onto them?
Looked at a perforated steel floor option.

Still Farming · May 27, 2016

potter said:
I have no idea of the kwh of linseed straw as I have no heat meter or buffer, just the 4000 lts of water around the water jacket and the pipework plus the two heat exchangers that are 8ft x 4 ft each stacked ontop of each other. We burn nearly 3 bales every 24 hrs and use approx 60 bales a season to dry 2000 tonnes of wheat. I estimate that the straw costs us about £650 rather than £6500 of lpg gas. No RHI or subsidy but paid for itself after 3 harvests.

Do you get much heat loss as your pipes look exposed.
like it.
You fan set up looks better than standard ones.-did you add later yourselves ?

frustratedfarmer · May 27, 2016

360farmsupport said:
In what regard? I'm afraid it depends on what you are doing with it and how you will use it. It may be that the activity is covered by an exemption but it's difficult to say without some details.

Thanks for this. I am want to rock up at a recycling centre or just industrial yards where a lot of cardboard is used and then bailed for recycling. The plan is to go around with Jcb and 30 ft trailer and load up bales of th stuff and take it back and burn it for RHI heat. I see it as a positive for businesses who currently must pay something to have them removed by Biffa or the like.

I am certified to burn it in my boiler so hoping any waste paper work is easy enough to adher too

wasted years · May 28, 2016

Chippy said:
Must be some more people with some opinions? More pictures of completed ones would be nice

Tim Kemp built one at Stoneybeck near Penrith, you may know it.
He told me he had another to do (drying floor).

GrassChopper · Jul 12, 2016

If its a waste you want to process I think you need to be covered by an environmental permit, and the EA knows how to charge.

renewablejohn · Jul 13, 2016

frustratedfarmer said:
Thanks for this. I am want to rock up at a recycling centre or just industrial yards where a lot of cardboard is used and then bailed for recycling. The plan is to go around with Jcb and 30 ft trailer and load up bales of th stuff and take it back and burn it for RHI heat. I see it as a positive for businesses who currently must pay something to have them removed by Biffa or the like.

I am certified to burn it in my boiler so hoping any waste paper work is easy enough to adher too

I presume by certified you mean you have a Waste Incineration Directive approved boiler with a 24 hr emission monitoring system.

Yorkshire farmer1 · Jul 13, 2016

Must need some certification if its "waste" ?

Doing it for the kids · Jul 13, 2016

renewablejohn said:
I presume by certified you mean you have a Waste Incineration Directive approved boiler with a 24 hr emission monitoring system.

What is cardboard considered as then? Does it need a WID to burn?

If the boiler can burn it is this not acceptable?

renewablejohn · Jul 13, 2016

Doing it for the kids said:
What is cardboard considered as then? Does it need a WID to burn?

If the boiler can burn it is this not acceptable?

I thought the burning of clean recycled paper and cardboard had been banned in 2014 forcing it to be recycled, leaving only dirty paper and cardboard available to burn in a WID compliant plant.

GrassChopper · Jul 13, 2016

Further to needing an environmental permit and paying an annual charge of thousands of pounds, you will also need to be having emissions tested annually which isnt cheap either. As you'd be floor drying in a closed shed I should imagine a stipulation of the permit conditions you would have to install ventilation systems and filtration systems to stop the emissions from the waste processing harming 'receptors' (as the EA calls them).
Thus is the problem with waste, its a can of worms, as soon as you mention waste a whole load of regulation falls on you and it can also be difficult dealing with waste producers as they have a very strict duty of care to make sure they know where all their waste is going and if its to legitimate and regulated/permitted facilities

Biomass boiler - floor drier - waste paper

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