Author Topic: Cylinder sizing table  (Read 15195 times)

Offline Julian

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Re: Cylinder sizing table
« Reply #15 on: November 20, 2011, 11:13:03 PM »
Calm down dear, it's only an advert!

I think you must have been unlucky, but I think it's worth mentioning on the page if only to say take it to the scrappy, the extra weight should allow you to exchange if for a more suitable one free of charge!

We can use whatever you like.  Other permutations, if you need them, will be a breeze now the basic components are drawn.  Let me know how you want them presented and if to include the ticks etc.
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Offline Tony

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Re: Cylinder sizing table
« Reply #16 on: November 24, 2011, 09:38:58 AM »
Please can we have the top four cylinders as separate files, so we can make a gallery with description by each one, and the bottom three as a single image, we can just put some text by that indicating the importance of not having heating elements above a certain height in the inverted cylinder?

I think we should keep the ticks.

Sorry not been about much this week, urgent project at work, been working weekends and evenings to get it done.

Offline Julian

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Re: Cylinder sizing table
« Reply #17 on: November 24, 2011, 06:26:52 PM »
There you go ....














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Offline Julian

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Re: Cylinder sizing table
« Reply #18 on: November 24, 2011, 06:45:51 PM »
Oops, seem to have lost the immersion from the primatic cylinder ... just uploaded another version, so should be OK now.
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Offline Tony

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Re: Cylinder sizing table
« Reply #19 on: November 27, 2011, 11:03:14 PM »
Fantastic, thanks Julian.

I'll get right on with putting them on that page.

Offline Tony

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Re: Cylinder sizing table
« Reply #20 on: November 28, 2011, 09:16:56 AM »
Please could everyone that has a cylinder take a quick peer and review what I've written:

http://www.biopowered.co.uk/wiki/Hot_water_cylinders

I've not yet included Julian's photos of the new connections being soldered - could do with more of a description as to what each picture shows and how the bits were made for the one with the connector on a slope.

Offline Julian

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Re: Cylinder sizing table
« Reply #21 on: November 28, 2011, 06:04:09 PM »
I've got a direct cylinder and no problems with what you've put.

Just some other comments ...

Might be better titled "Processors - using Hot water cylinders" or "hot water cylinders as processors" or similar.

To try and maintain an international bent, you could point out that this is a UK HWC, US cylinders are different but can be used for the Appleseed design.

... occupies some of the cylinder's volume and two connections which could otherwise be used as processor connections.

If using a second hand cylinder, check the integrity of all the connections, if they look dodgy it may be safest to find a better cylinder.  If the cylinder is sound, check for lime scale.  Once the cylinder has dried internally, this can be heard inside when the cylinder is shaken.  As much limescale as possible needs to be removed, as any lumps left in the processor could cause damage to the circulating pump and block the venturi if you fit one.

I didn't take any other photos of the connections I'm afraid, but descriptions are as follows ...

The slanty one ...

To fit a connection vertically through the sloping bottom of the processor a brass compression fitting was used.  An elliptical flange with an elliptical hole to take the fitting was cut from a piece of opened out, scrap copper tube.  The flange was then silver soldered to the fitting at the appropriate angle.  Silver solder was used so that the assembly could then be soft soldered to an elliptical hole in the processor top.  (one photo shows the fitting in the processor with the flange silver soldered in place.  The second shows the fitting and flange assembly soft soldered to the processor).  If you want to mention it, just visible in those photos is am immersion heater socket soldered to the dimple (the flange is almost a perfect fit in the dimple) as an access point or a connection for future developments.

The one in the side of the cylinder ...

The foam lagging was carefully cut back and a hole drilled for a standard tank connector.  A piece of wire was fed through the immersion heater hole until it poked out of the new hole.  The internal half of the tank connector without the rubber washer, was then slid down the wire and pulled out of the hole.  The securing nut was tightened on the connector and the whole assembly soft soldered in place.  The foam lagging was pritected with wet rags during the soldering process.

Soldering gives a far better seal than just relying on the washer to make the seal.  The washer is likely to be made of a material incompatible with Biodiesel.



Also we could mention insulation, in that the top of the processor needs a good layer.  I can do additional graphics showing a standard foam lagged cylinder and a graphic and description of how I used polyurethane foam to insulate the top.  It's all been cut off now but I might have some old photos I could dig out.

I'm sure others could contribute alternative versions of the top insulation too.

Sorry it's a bit long winded, but you did ask!
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Offline Julian

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Re: Cylinder sizing table
« Reply #22 on: November 28, 2011, 06:45:35 PM »
There you go ... one with standard insulation

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Offline Julian

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Re: Cylinder sizing table
« Reply #23 on: November 28, 2011, 07:03:29 PM »
And the top insulated version ...

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Offline Julian

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Re: Cylinder sizing table
« Reply #24 on: November 29, 2011, 12:21:55 PM »
Inspired by Jim's recent post on the VOD, you could add a column to the table giving batch sizes against the cylinder capacities.  Jim's recommendation is WVO + Methoxide + 10% head space, although with the inverted dished end it may be preferable to be a little more generous with the head space.

I'll try and do some blurb on the foam insulated top later today.
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Offline Tony

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Re: Cylinder sizing table
« Reply #25 on: November 29, 2011, 02:12:33 PM »
OK nice one, I'm sure I'll get around to some modifications based on your commentary above too.

My cylinder is 166l and I do 125l batches with 22% Methoxide (152.5l) which must leave 13l headspace.  I've tried to do a bit more but the level gets up to where the venturi discharges and also I was getting oily gunk down the condenser takeoff (which picks up from around the rim at the top).  So I would say for a cylinder 15l headspace is about what to aim for.

Offline Bio Dervotee

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Re: Cylinder sizing table
« Reply #26 on: December 13, 2011, 05:31:44 AM »
hi folk's
not been on recently
got new business starting, blasting,  noooooo not nitro,
i'll always be here if i can help in any wayh
best site ever for bio
cheers
Will
ps
got a 45/200 drum with a cone on bottom,  not finished yet,,cone is welded on .,,,anyone interested????????? could also weld another one on top,,,,,,,
if you want
cheers
Will

Offline Bio Dervotee

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Re: Cylinder sizing table
« Reply #27 on: December 13, 2011, 05:39:38 AM »
could be blasted too, and pressure tested,           35psi ok?

Offline Bio Dervotee

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Re: Cylinder sizing table
« Reply #28 on: December 13, 2011, 05:44:59 AM »
its got 'clip on lid''
i will not be standing beside it on pressure test
enough said

Offline K.H

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Re: Cylinder sizing table
« Reply #29 on: December 13, 2011, 05:41:35 PM »
Bio Adam on the VOD has posted a request for cones today