Is this gizmo a preheater

**The Doctor** · 06-23-2007, 07:51 AM

THe photo is on top of a big ole' boiler at a co-op.
I was wondering what the water lines do at the blue deal.

**slimwoodie** · 06-23-2007, 04:03 PM

not clear ..

installed on the stack..??

economiser, feed water pre heater

**mikethemech** · 06-23-2007, 06:29 PM

Try the URL on it's side :-)

http://cannonboilerworks.com/fwh.php

**The Doctor** · 06-24-2007, 07:18 AM

Originally Posted by mikethemech

Try the URL on it's side :-)

http://cannonboilerworks.com/fwh.php

Awww, but what fun is that? I can sort through the personalities and characters here, and THEN go the the URL. It's much more fun IMO.

That IS on top of the stack, Slimwoodie. It's on top of a Cleaver Brooks.
It's a CB-LE, which might be the line or type, if that means anything.
Don't mind me, it's just that the boiler is just one of many on site, which just adds to the wonder of it all for me.

**slimwoodie** · 06-24-2007, 07:32 AM

Aaaaahhhhh ..

itsa Stack Economiser ....

carefull of the stack temp, .....on Oil, they can really soot up a C-B

**slimwoodie** · 06-24-2007, 07:33 AM

I assume yer burnin' Oil ......

or ....
that's a really bad lookin' gas fire .....

**coves** · 06-24-2007, 01:14 PM

how does a stack economizer work and how would i know if i was looking at one.....?

**bustawrench1** · 06-24-2007, 06:06 PM

Originally Posted by coves

how does a stack economizer work and how would i know if i was looking at one.....?

A stack economizer is really not much more than a heat exchanger set on top of the breeching before the stack connection. Feed water is run through it on it's way into the boiler. The water is preheated by the flue gas passing over the other side of the tubes on it's way out to the stack. This increases efficiency by used some of the waste heat and allowing the burner to run at a lower setting to maintain the load.

**The Doctor** · 06-25-2007, 10:24 PM

Originally Posted by slimwoodie

I assume yer burnin' Oil ......

So did we. We figured it was bio or somethin.

or ....
that's a really bad lookin' gas fire .....

they're burning natural gas! I hardly believed it until I saw the notes from the tech-- 8" tested on some date was written on the gas piping. It was either 2 or 3" pipe, or maybe it was 2 1/2"

This pic was the best, and it doesn't look real good for the flame, but when you look from the back peep sight the flame has much more blue in it.
The water in the econo. was picking up like 55*. It was leaving at 225* at like 125psi. I was like a kid in a pie shop--thinking again about working for that rep in this area when I visit sites like this.

**Boiler_Man** · 06-26-2007, 03:28 AM

That last pic is of a dual fuel boiler. Oil/Gas.

**The Doctor** · 06-26-2007, 06:11 AM

Originally Posted by Boiler_Man

That last pic is of a dual fuel boiler. Oil/Gas.

Bingo! And the GPH on those are

....well, you know they say it takes money to make money.

Boiler Man, how long are the teardowns and cleanings on those puppies?

**Boiler_Man** · 06-26-2007, 05:43 PM

We can do our 400hp Cleaver Brooks in a weekend if we have to but we don't get in any hurry. We fire Nat. only and have very good water treatment so punching the tubes and wash out is not to bad. Not sure how bad it would be punching the tubes on an oil fired rig, I never done it, but it sounds like it would be a good time to wear the old uniforms. If you have a lot of refractory to repair it may take longer.

**slimwoodie** · 06-26-2007, 06:41 PM

I .... Like ...Refractory repair ..... $$$$$

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