Author Topic: Waste oil burner Mk11 prototype working reliably-ish  (Read 92 times)

mikenash

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Waste oil burner Mk11 prototype working reliably-ish
« on: August 01, 2020, 03:36:27 AM »
See 30-sec video YouTube link if anyone is interested

https://www.youtube.com/watch?v=JrPAqyuBNcI

This is a Mk2 version of the prototype and it seems to do the things I'd like it to do:

Burn clean-ish and consistently with no energy input other than oil.  Start and run pretty much without smell or fumes.  Put out lots of heat and provide a "cook-top" with hotter and cooler surface areas.  Use a reasonable amount of oil

Pictures & short video tell the story, really

It burned 1.2 litres of oil in an hour and eight minutes.  I got it warmed-up, filled the little oil reservoir, set the flow to a pencil-lead sort of cross-section, set the timer on the phone and wandered off to do some other work.  It ran steadily and consistently for an hour and eight minutes without any intervention from me

I have made the "up-draft" burn chamber thingie with a 100mm BSPTM thread on top so it can just come off to be tinkered with

The flue thingie is on a flange so I can change it at will.  I put in a TEE with an 80mm drain bung on the bottom to facilitate cleaning.  It's 100mm flue atm - I'd anticipate going to conventional 6"/150mm flue sections if it works well-enough to end up in the shed

My observation, fwiw, is that this thing and its ilk are basically just one big draft/flue - it doesn't like interruptions such as a baffle I trial-fitted; but I have been starting it by tipping in about half a coffee-mug of a 50/50 diesel/petrol mix & lighting it with the butane torch.  It lights with a bit of a "whump" and the expanding gases shoot through and up and out the chimney with an immediate "roar" and it establishes a solid draft which continues as I turn on the oil a couple of minutes later; and it just burns happily away

Next step is to try it on various dilutions of the heavy oil of which I have tonnes - and then tinker with a Mk3 that might look a bit "nicer".  Might

Cheers

LowGear

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Re: Waste oil burner Mk11 prototype working reliably-ish
« Reply #1 on: August 01, 2020, 01:33:52 PM »
Dirty-ish too.
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mikenash

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Re: Waste oil burner Mk11 prototype working reliably-ish
« Reply #2 on: August 02, 2020, 07:35:39 PM »
Yes. Doesn’t like the wind. Seems to not make any smoke at all on a still day when the oil/air is consistent. Check out pic/vid of flue against the gum trees & the sky on a calm day