1000 Degrees up the Chimney

arcticcatmatt · Post by **arcticcatmatt** » Mon. Feb. 09, 2009 11:35 am

Relax, it is not my stoker hehe.

Part of my job at work is energy conservation. I am currently looking at a heat treat furnace that runs off natural gas. I have a large discharge that vents out at about 1000 degrees. I want to harness this heat and use it to heat the hot water for another application that requires hot water many times a day (wash tank).

Does anyone know a company that specializes in this sort of thing?

WNY · Post by **WNY** » Mon. Feb. 09, 2009 11:49 am

Get a custom coil made

heres a few I found...

http://www.benditinc.com/

http://bauerweld.com/bending.iml?tsid=googleppc&g ... Qgodqj124w

steamup · Post by **steamup** » Mon. Feb. 09, 2009 1:03 pm

Not as easy as it sounds but is a possibility. This is a very industrial situation. If flow stops through the coil and exhaust gas does not - you have a "boom".
The critical temperature of water is 705 deg. f. It requires 3200 psig to keep it water at this point or it flashes to steam at 1600 times the volume of the water.

One must also evaluate the pressure drop caused on the flue and how this will be overcome.

These guys might have some suggestions.

http://www.bjmuirhead.com/

Post by **coaledsweat** » Mon. Feb. 09, 2009 1:49 pm

These guys are all about recovering heat and putting it into water, pretty much standard equipment in all our plants.

http://www.kemcosystems.com/

CapeCoaler · Post by **CapeCoaler** » Mon. Feb. 09, 2009 6:47 pm

Liquid Sodium to the rescue!

Liquid sodium is used as the coolant and heat-transfer medium in the LMFBR reactor. That immediately raised the question of safety since sodium metal is an extremely reactive chemical and burns on contact with air or water (sometimes explosively on contact with water). It is true that the liquid sodium must be protected from contact with air or water at all times, kept in a sealed system. However, it has been found that the safety issues are not significantly greater than those with high-pressure water and steam in the light-water reactors.

Sodium is a solid at room temperature but liquifies at 98°C. It has a wide working temperature since it does not boil until 892°C. That brackets the range of operating temperatures for the reactor so that it does not need to be pressurized as does a water-steam coolant system. It has a large specific heat so that it is an efficient heat-transfer fluid.

http://hyperphysics.phy-astr.gsu.edu/hbase/nucene ... asbre.html

gitrdonecoal · Post by **gitrdonecoal** » Tue. Feb. 10, 2009 2:59 pm

interesting topic. one I was kinda gonna ask about. got a USSC hotblast 1557m, and love it to death. I do believe, im gonna check, that the claytons which are a grade bigger than my hand fed furnace have a hot water add on for domestic hot water. and I was wondering if anyone on here has heard of or know that this could be done. maybe somehow installing a coil in my furnace somehow. could it be done? or am I just a crazy coal freak.