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Has anyone ever experimented with a instant water heater to heat bio?

There are different types gas fired, diesel and electric.

Could be used to de meth or dry bio?

just an idea but if it was used to heat bio to say 40 deg then pumped against an orifice plate into a large chamber the sudden pressure drop may boil of the methanol safely.

same idea for drying but using a hot air gun in the chamber

Not sure if my physics is correct!

Cheers
 
Location: Cork | Registered: December 05, 2010Reply With QuoteReport This Post
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I'd be concerned about a gas or propane fired demand heater. Any pinhole leak would spray oil onto an open flame, turning the heater into a blow torch. I'm going to use an oil-fired heater from a pressure washer but use indirect heating. I'll heat a drum of water into which I'll have a coil through which I'll pump the oil.


2002 F-250, 7.3l on WVO since '04
'82 VW Rabbit diesel 1.6l na
'83 GMC 6.2l Class C RV
'85 F-350, 6.9l flat bed
'85 E-350, 6.9l cube van
2 Mercedes 300SD's
3 Chinese Changfa-style diesel generators- 12kw, 8kw & 7.5kw
Mitsubishi 3 cyl diesel generator/light tower
Kubota 2 cyl. diesel, water cooled air compressor
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I run my company entirely on renewable energy including electricity from generators running on biofuels.

 
Location: El Dorado, Ark | Registered: July 04, 2004Reply With QuoteReport This Post
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Thanks,

I know about fire hazard, there are precautions that could be taken (heat activated shut off valves etc like you see on a conventional oil fired boilers). I'm not talking about high temp here.

Just wandering if this has been tried/considered before.

Cheers
 
Location: Cork | Registered: December 05, 2010Reply With QuoteReport This Post
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I know about fire hazard, there are precautions that could be taken (heat activated shut off valves etc like you see on a conventional oil fired boilers).


None of the 'precautions' could prevent explosive methanol fumes from reaching the flame.
It would be an interesting entry in the Darwin Award competition.



 
Location: coldest N.America | Registered: May 03, 2005Reply With QuoteReport This Post
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Thanks lads, I'll scrap that idea! Roll Eyes

I hope it's o.k to throw about mad ideas on this forum, I'm still quite new but really enjoy making my system as efficient as possible.

There must be a way to indirectly heat the bio fast to enable de-meth and drying. I have a perfectly good system at the moment but it takes about three hours to de-meth and dry 150 liter
 
Location: Cork | Registered: December 05, 2010Reply With QuoteReport This Post
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quote:
indirectly heat

I really like indirect heat sources for hazardous operations. They're normally used where I work. Having the heater in a separate utility room is one obvious way that's done. CWB use a vaguely similar concept to heat their biodiesel processind equipment (see "not water heater").
There's no reason an instant water heater can't be the original source of the heat, just don't run oil through it, and keep it safely isolated from any potential methanol vapors. The biodiesel equipment would be in a room next door, but with no direct opening between the two rooms.
Use the water heater to heat water. Pump the hot water through insulated hoses to the biodiesel equipment. Use coils and heat exchangers to transfer the heat. If you store the hot water in a well insulated tank, then you have "stored heat" that can be used to quickly bring the biodiesel equipment up to temperature.
The question then becomes what is more efficient - using a tankless heater plus an insulated storage tank, or a conventional insulated tank water heater?
Hot water leaks don't start fires.
PEX tubing works ok for handling the hot water.
CWB made tote heater spears, a 1000-gallon stainless-steel water-jacketed processing tank, and wrapped several other tanks (up to 5000 gallon) with PEX that then had spray-foam insulation put over the outside. All heated with hot water from the "Not water heater". You could do something similar.
 
Location: Moses Lake, WA, USA | Registered: August 15, 2001Reply With QuoteReport This Post



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Location: Cowboy Country | Registered: December 06, 2004Reply With QuoteReport This Post
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CWB = Central Washington Biodiesel, in Ellensburg, home of Central Washington University where I just finished my Engineering MS degree. I was able to build some things and tweak the process at CWB as Independant Study projects.

Cheers,
JohnO
 
Location: Moses Lake, WA, USA | Registered: August 15, 2001Reply With QuoteReport This Post
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I'm putting together an indirect heating system consisting of the hot water coil from a pressure washer plus a spare coil (free from a local pressure washing equipment repair shop). I'll generate hot water which will be pumped into another drum. Sitting in that drum will be the second coil through which I'll pump the veg oil. The same setup would work with a wood fired heater. I've thought of using a barrel heater, the type with a 55 gallon drum on legs plus a second drum stacked on top. Those things put out some serious heat running on "glop logs" made of hydrogenated gunk and wood chips.


2002 F-250, 7.3l on WVO since '04
'82 VW Rabbit diesel 1.6l na
'83 GMC 6.2l Class C RV
'85 F-350, 6.9l flat bed
'85 E-350, 6.9l cube van
2 Mercedes 300SD's
3 Chinese Changfa-style diesel generators- 12kw, 8kw & 7.5kw
Mitsubishi 3 cyl diesel generator/light tower
Kubota 2 cyl. diesel, water cooled air compressor
Onan 12.5kw air-cooled diesel genset
I run my company entirely on renewable energy including electricity from generators running on biofuels.

 
Location: El Dorado, Ark | Registered: July 04, 2004Reply With QuoteReport This Post
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Those things put out some serious heat running on "glop logs" made of hydrogenated gunk and wood chips.

Todd:
The ones I saw had the vents offset and your right , the upper drum gets Hot !!
Hope your doing well,
Talk to you soon !!


1999 K3500 Dually with a new AMG 6.5TD turned up a bit by John Kennedy
Chevy DMax Totaled thanks to a 20 year old in a Mustang
Mercedes 300CDT
John Deere
On B99.?
 
Location: Decatur, Al | Registered: September 03, 2009Reply With QuoteReport This Post
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