Saturday, August 18, 2018

Fire Up!

After completing some temporary copper piping ( I couldn't wait for the bronze to crawl here), it was time to fire it up. Several days before, the boiler was filled, a little oxygen scavenger added and I took it up to working pressure with the hydro pump to make sure all was tight. Water was dropped to a third glass.

In true UK tradition, I lit it off with Kingsford Match Light Charcoal ...



In short order, the fire was over the grates and coal was added:


Here's looking up through the stainless grate bars at a hot fire. In an hour, I had drafting steam, but didn't force it because I wanted to see how it would do naturally aspirated. In two hours, we were at warming through pressure (100-125), and shortly thereafter, the safety let go at 200 psi:


I had told the Mrs, "Watch the neighbors (whose house you see) come running when the safety lifts." "Hey! You all right?!" "Yup. Just the safety." Another typical suburban Saturday ...

A rain storm hit while we were firing things up. So the boiler was rained on, not for the last time:


Some data:
- Combustion chamber door never got above 350 F, so I'm pleased with the plenum insulation, etc. The door itself is still rather plain. So I'm imagining some bronze hand rails, a warming shelf for baked goods and maybe an espresso maker if I can figure out how to pipe it.
- The boiler is more efficient than I imagined. The smokebox and smokebox plenum never got above 350 F. This will change under forced draft. The permanent stack will have a pyrometer so it can be monitored with greater precision.
- With jacketing, I expect it to be more pleasant to be around. It was a hot day ...
- Anthracite firing went as planned. This was pleasing as it is a compact and hot fuel. Plus it is local. A scuttle and a half (twenty pounds?) brought us to working pressure.

Boiler Summer

So this is the summer of the boiler. It was sitting in the corner, collecting dust so I wanted to finish it.

First to be finished was the smokebox:


That's not a fire in the furnace. The shop is humid so a heat lamp keeps the local dew point from condensing on and rusting the steel. As was typical, the smokebox door is hung on hinges and secured with dogs. It can quickly be unsecured and swung up to snug a tube, clean the tubes or whatnot. The unfinished water glass is to the right.

Here's another picture of the smokebox end with a temporary stack for fire up:


Next was to finish the grate bearers and the grates. The grates are solid bar, UK style. In this photo, the firebrick is visible lining the combustion chamber. For anthracite firing, fire brick is essential for retaining and reflecting the heat. For hardwood, they could be taken out except for the furnace end wall.


The grate area is two square feet with the brick in. Below's a picture of the combustion chamber before the reflective plenum is placed in. After the plenum was in, I sealed everything with a 5,000 F goo.


The refractory brick is shown before I covered all of the supports with cement.

Here's a shot of the outside:


Items of note: There's the combustion chamber seam cover strip to the left. Two angle iron supports, center and front behind the glass will support the jacket later. The insulation will be an inch thick. No one should have a cow about the piping. Except for the schedule 80 steel nipples, it is all class 300 bronze and brass.