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KenB
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« Reply #30 on: November 29, 2009, 08:31:29 AM » |
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Balls?
I got mine from the local blacksmith who makes up decorative ironwork such as gates and fences.
50mm diameter, hollow, cast from brass with a 6mm wall thickness. M8 threaded female screw connection which will take an air pipe directly.
Cost me a tenner each.
Drilling them is the fun bit, but with a high speed pcb drill mounted in a very rigid stand, you can peck drill them with the 10 thou drill from the outside and counter bore from behind with a larger size.
Ken
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homebrewpower
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« Reply #31 on: November 29, 2009, 01:02:03 PM » |
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Ken, have you actually managed to 'Peck Drill' them or is this theory as to how it can be done???
Have you fired it up yet? Would be interested to see the results.
Think Ivans set up is looking promising, hope it works for him.
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Andy Mahoney HomeBrewPower - Renewable Energy Projects http://www.homebrewpower.co.ukMy additional links have been removed as the break the forums SPAM rules. Life After Fossil Fules...... |
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Ivan
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« Reply #32 on: November 30, 2009, 01:31:32 AM » |
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Looking at Ken's pic, I see two holes in the top of the ball - so it looks like Ken's is drilled. What's the story, Ken?
I am using a heavy cast ball too, but I decided to counter-drill from behind first, then drill the fine hole in the front of the ball. I was worried that swarf from the counter-drilled hole would block the fine hole. I was also careful to blow it out with an airline before - just in case.
I've just got a single hole in my burner. I'll see how that goes first.
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homebrewpower
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« Reply #33 on: November 30, 2009, 04:43:28 PM » |
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Hi Ken / Ivan,
What are you guys using for your compressed air source? I am looking at sourcing something compact and cheap to supply air at 15-60PSI Low volume for an automated system I am working on. Anyone know of such an item? It will require some pressure control and a small compressed air tank.
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Andy Mahoney HomeBrewPower - Renewable Energy Projects http://www.homebrewpower.co.ukMy additional links have been removed as the break the forums SPAM rules. Life After Fossil Fules...... |
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SteveH
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« Reply #34 on: November 30, 2009, 05:25:53 PM » |
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Need to know volume of air requiered too...? (m³/s)
A small vane compresser is going to be cheapest route, but will probably need 2 stages to get to 60psi.
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Preveli, South Crete.
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Ivan
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« Reply #35 on: November 30, 2009, 05:39:52 PM » |
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I'm planning on using an airline - it already has a pressure regulator. An alternative would be a mini-compressor. Navitron can supply these pretty cheaply (under a tenner). However, they don't have a pressure regulator or pressure switch. A pressure regulator is around £20, not sure how much a switch is, or where you'd buy one. You could use propane instead of air, but the idea doesn't appeal to me.
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Lincsoldbird
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« Reply #36 on: December 16, 2009, 10:54:57 PM » |
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Hi Machine Mart do pressure switches cheap. Also look at Murphy's Machines Waste oil heater he uses production
misting nozzles instead of the ball. About 10 pounds each. I have the plans if any body would like a copy.
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Ivan
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« Reply #37 on: December 16, 2009, 11:24:54 PM » |
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I'd certainly be interested to have a look at the plans. Now it's getting cold, I keep thinking I should have spent more time on the oil boiler conversion. Maybe I'll find a few days over Christmas, when no-one is looking...
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Lincsoldbird
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« Reply #38 on: December 17, 2009, 01:53:16 PM » |
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Hi Ivan I hope you got the E mails. It shows the basic principles of the design. the full plans are about 60 pages long and i will need to scan them as my link to the web site as expired. If you wont any more details let me know and I will see what I can do. Not got round to building one yet so don't know how well it works.
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Ivan
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« Reply #39 on: December 17, 2009, 03:50:11 PM » |
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Thanks, but I only got one email (one page attachment) - any chance of resending? Also, if it's possible to send in slightly higher resolution, as I can't make out the text.
Many thanks
Ivan
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ecogeorge
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« Reply #40 on: March 15, 2010, 10:49:31 PM » |
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Any progress here anyone ?
I pick my central heating boiler up on thursday, - day out to Devon but @ £21 for a working boiler who cares.
I plan to go down the filter well and heat the oil route, -will keep you informed.
rgds George.
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KenB
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« Reply #41 on: March 16, 2010, 09:26:21 AM » |
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With the boiler scrappage scheme, the scrap yards are full of old boilers.
I picked up a large flat plate heat exchanger for a couple of quid and a complete oil boiler nozzle/blower/burner unit for £3.
I also got a couple of steam coils out of a steam cleaner for their scrap iron price. There's about 25kg of high pressure steam pipe in one and 20kg in the other. 24m length of tube with 0.7m2 of surface area. Should make a good, compact, rapid heating, low water volume, solid fuel heat exchanger for my woodchip fired auxiliary boiler.
IMHO there has never been a better time to find low cost components in scrapyards. Sod bureaucracy, they are taking us up a road to ruin - just recycle, re-purpose and re-use.
Ken
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« Last Edit: March 16, 2010, 04:30:13 PM by KenB »
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Ivan
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« Reply #42 on: March 17, 2010, 12:33:39 AM » |
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Nice find Ken! By the way, I have a 28mm boiler coil removed from a copper water cylinder in my garage- is that any use to you? I haven't weighed it in yet, as I thought it might be useful for something.
Ecogeorge, Sorry I haven't made much progress. First it got too cold, then I got too busy, and now I'm thinking I wouldn't finish it before spring. I will keep pursing things though. I've bought a rayburn for the kitchen, to test the snugburner, and I may use this as a testbed for DIY oil-burning ideas!
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Baz
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« Reply #43 on: May 13, 2010, 08:47:38 AM » |
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BTW there are some much simpler oil burner designs used by the home foundry people.
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Ivan
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« Reply #44 on: May 26, 2010, 01:53:39 PM » |
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Would you care to post a link?
I've seen people pre-heat the veg oil and send it through an enlarged jet in a standard burner. But I think you're more likely to have a blocked jet and perhaps poorer quality combustion. Anything that's efficient and clean is well-worth a look, in my view
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