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Author Topic: Wood - and coal fired vertical boiler  (Read 363 times)

Offline Hankwilliams

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Wood - and coal fired vertical boiler
« on: April 23, 2020, 08:49:23 PM »
Some weeks ago I bought in the net an old riveted copper boiler for wood and coal. The boiler misses water gauge, safety valve and manometer - this parts I ordered. On monday I made a pressure test with warm water until 6,5 bar - absolute tightness! The riveted copper parts are sealed with a alloying of tin and plumet.
Yesterday I made a steam test with gas burner until 4 bar, at first the safety valve was a little leaking, but was no problem to seal.
Tomorrow I will heat with wood - we will see the result. I think, this will give an interesting steam plant in combination with an steeple engine like Stuart`s James Coombes.

Thomas

Offline derekwarner_decoy

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Re: Wood - and coal fired vertical boiler
« Reply #1 on: April 24, 2020, 08:26:05 AM »
True an old treasure  :trophy ....will make a superb smoky source of steam for a stationary steam plant with spinning governer

There are many examples on the WEB and always seem to attract a gathering at displays ...

Does the boiler shell have any reference marking or registration numbering?

Derek  :beer
« Last Edit: April 24, 2020, 08:32:53 AM by derekwarner_decoy »
Derek Warner

Honorary Secretary [Retired]
Illawarra Live Steamers Co-op
Australia
www.ils.org.au

Offline Hankwilliams

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Re: Wood - and coal fired vertical boiler
« Reply #2 on: April 24, 2020, 06:41:48 PM »
Hi Derek,

I don`t know anything about the history of the boiler. There is no reference marking. The kind, like fire- and ashdoor and also the rounded ashpan are made, leads to the the conjecture, that the boiler was manufacted and is not a singular built. At first I supposed, that the boiler was made in England, but the threads were metric - thread of water gauge is M 8 x 0,75.
Perhaps one of our members knows more about this discovery?

Thomas

Offline Hankwilliams

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Re: Wood - and coal fired vertical boiler
« Reply #3 on: April 25, 2020, 02:36:43 AM »
Today afternoon the first steam up with scrap - plywood. In the beginning I had to take care, that the fire don`t extinct - there should be some small holes in the firedoor for the air. After some pressure was availiable, one can use the steam blower, what was very effective. After 20 minutes 4,5 bar pressure was reached. The blower gives a strong draught, without it would be difficult to reach higher pressure. Unfortunately I didn`t have any anthracite coal - probably the the fire will be much stronger.

Offline derekwarner_decoy

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Re: Wood - and coal fired vertical boiler
« Reply #4 on: April 25, 2020, 09:04:08 AM »
So I suspect the copper outer is a decorative shell, and the actual boiler is contained within

The boiler itself is also probably of riveted and caulked construction

Depending on the age/year period of manufacture, the boiler may have been lagged with an asbestos material or even with wood lathes over the asbestos

Do not be concerned with the word asbestos, as it is contained/dormant and of no consequence or harm

In one of the images we see a different red/purple patina on the outer shell, so little children must be aware  :ranting

When you turn the boiler on its side or upside down and remove the ash pan, do you see the actual boiler shell endplate and vertical fire tubes?...are there signs of silver soldering of the tubes to the tubeplate?

Another feature of such model vertical boilers was a reinforcement ring plate, riveted to the actual boiler shell approx mid position. This plate also had the mirror image of the tube bank pattern, so provided additional shell reinforcement against diameter expansion ballooning and also maintained the boiler tubes straightness

This form of construction would have been the only way to clean the boiler tubes of the build-up of carbon black together with bituminous crud that held the carbon & set like tar......or clinker

You are certainly correct that the calorific value of 'coal' is near x 2 of 'timber' 

Would suggest you don't plan on doing a boiler tube de-coke on the loungroom bone carpet  :nono

Derek
Derek Warner

Honorary Secretary [Retired]
Illawarra Live Steamers Co-op
Australia
www.ils.org.au

Offline Hankwilliams

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Re: Wood - and coal fired vertical boiler
« Reply #5 on: April 25, 2020, 09:00:11 PM »
The boiler is a crosstube one with a wet firebox, only two strong crosstubes (ca. 25 mm diameter) one upon another and the smoke tube with 2 further small crosstubes, it goes into the funnel like in the sketch.
When I got the boiler, I looked at the riveted joints, I don`t found silver solder but a soft alloy of - like I suppose - tin and lead metal. As far I know in former times the riveted joints were tighten with this soft and low melting alloy. As far there is enough water in the boiler, this alloy can`t be overheated. If not, the tighten alloy will melt and it must be difficult to repair this joints. But the strengthening of the boiler obviously is made by the rivets.

Today I made a further heating up with wood and charcoal. But charcoal is difficult to inflame, nearly no flames but only glowing fire gives no sufficient heat for the rather high firebox. I will try to get some anthracite, which for the 5 " and 7,5 " locos is used.

Offline Hankwilliams

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Re: Wood - and coal fired vertical boiler
« Reply #6 on: May 02, 2020, 12:14:05 AM »
Yesterday I got this nice steeple engine via ebay.  All threats are metric, bore and stroke are 19 by 38 mm. Height of the engine is 300 mm, weight 9 kg. Together with the vertical boiler this will be a nice steamplant. The compression of cylinder and piston seems strong when I turn the flywheel. Like the boiler also history of the engine is unknown. The combination engine and boiler will take some time because I`m busy with drawing the exact plan of the "Presto" steamer and a lot of further sketches for my book about steam driven ship models.

Thomas

Offline Hankwilliams

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Re: Wood - and coal fired vertical boiler
« Reply #7 on: May 06, 2020, 03:55:21 AM »
First test run of the steeple engine today - with steam from the big Regner boiler. The engine was running, but there were some leaks at the gasket between slide box and cylinder. After tighten with a new home made gastet the engine was running as good as soundless for a while, but after 15 minutes the piston nearly stucks. Obviously there was too less clearance between piston and cylinder and with the expansion through heat the piston stucks. Another reason could be, that too less oil comes to the cylinder.
We will see. I have polish the piston on my lathe - now it seems better. Tomorrow will be a further day...

Thomas

Offline Hankwilliams

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Re: Wood - and coal fired vertical boiler
« Reply #8 on: May 07, 2020, 09:32:07 PM »
Great success! I altered the steam tubes to and from the oiler to the slide box. Now slide valve and piston gets oil enough - the engine is running well and there isn`t any leak. Minimum pressure is needed by 0,7 - 0,8 bar, this seems relative high for turning - but I think, it`s ok.
Next job will be to arrange the vertical boiler with the engine to a nice and suitable steamplant. A feed pump and a water tank also will be required.

Thomas

Offline Paddlemex

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Re: Wood - and coal fired vertical boiler
« Reply #9 on: May 08, 2020, 04:32:58 AM »

You make great finds on ebay Thomas. I look there from time to time but I have only seen Wilesco engines or multi K euro ones.
This engine looks great.

Jurgen

Offline Hankwilliams

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Re: Wood - and coal fired vertical boiler
« Reply #10 on: May 10, 2020, 07:17:20 PM »
Because I have to draw some illustrations, plan sketches of boilers and engines for my book, I can`t continue to built up the steam plant in the moment.
But the pictures should imagine, how the lay out could be. There must be a hotwell, feed punp, water tank - may be a little water tower like the railway ones - and also a coal bunker.

Thomas

 

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