Is there a simpler way to burn propane/natgas than using a Frost Fighter? - The Combine Forum
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post #1 of 14 (permalink) Old 10-20-2019, 11:15 AM Thread Starter
jvw
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Is there a simpler way to burn propane/natgas than using a Frost Fighter?

Needing to add more heaters for drying grain in bins. Moving the frost fighter around is a pain, and most of the functions of the heater are redundant when they are inline with an aeration fan.

Don't need indirect heat since propane exhaust is fine, don't need the fan. All I really need is a burner and let the aeration fan suck the heat in. And maybe a thermocouple for safety. Anything off the shelf( and bigger than a propane torch) that could be used for that purpose?


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Last edited by jvw; 10-20-2019 at 11:19 AM.
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post #2 of 14 (permalink) Old 10-20-2019, 01:46 PM
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If your using a frost fighter and need more heat get one elephant trunk and direct it to the back of the unit so it sucking the reclaim heat. You will double the heat output on the same unit. We do that on the construction sits in the winter.

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post #3 of 14 (permalink) Old 10-20-2019, 06:37 PM
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post #4 of 14 (permalink) Old 10-20-2019, 06:57 PM
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We just use 100-125,000 btu diesel heaters. They burn for 8 hours and we fill them from a slip tank. I welded up slip on stands that the heater sit on that slip around the top of the Edwards full centrifical fans.
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post #5 of 14 (permalink) Old 10-20-2019, 07:22 PM
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Get 5 feet of 8" ducting or something similar, direct it at the fan inlet and put a tiger torch in it. Princess auto sells one 500 000 btu.
https://www.princessauto.com/en/deta...it/A-p8499188e
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post #6 of 14 (permalink) Old 10-20-2019, 09:45 PM
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Did a bit years ago with just a tiger torch and an unregulated supply don’t work real great. The temperature was just to variable.

Those cheapy electric propane heaters is about as low cost as your going to get and have some
Safety built in.

https://www.princessauto.com/en/deta...er/A-p8264541e

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post #7 of 14 (permalink) Old 10-20-2019, 09:52 PM
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If power go’s out you will damage the fan
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post #8 of 14 (permalink) Old 10-20-2019, 10:25 PM
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Well power it with a relay energized by the fan contactor.

All power goes off heater quits, air fan quits heater quits.
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post #9 of 14 (permalink) Old 10-21-2019, 10:35 AM
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I have several 350000 btu propane heaters that i use to help dry the grain they have a 1/3hp fan in them as well as several safteys including air flow sensors . When i use them on a centrifugal fan ( with the motor external ) i just put a short piece of perforated culvert between the heater and fan which allows the cold air to be mixed with the hot air . If the fan on the bin has lots of flow i can also remove the small motor and fan from the heater as there is enough air flow to keep the air switch happy and still have protection . I run these off a 500 gallon propane tank but have found that you DON'T want to have full tank pressure in the hoses to the heaters as they will fill up with gunk from condensate you have to put a pressure regulator at the tank and run 20-50 psi then run another regulator at the heater to get whatever temp you want for the incoming air . You don't want to run these heaters on a fan with the motor in the airstream as it would get too hot for the motor unless you keep the temps down to 80-90 degrees .
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post #10 of 14 (permalink) Old 10-21-2019, 10:50 AM Thread Starter
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Quote:
Originally Posted by Slip clutch View Post
If your using a frost fighter and need more heat get one elephant trunk and direct it to the back of the unit so it sucking the reclaim heat. You will double the heat output on the same unit. We do that on the construction sits in the winter.
I do one better, and aim ALL the heat at the fan, have an elbow and stove pipe redirecting the exhaust into the fan, then I use metal roofing sheets to house the entire thing in, so all the air the fan sucks has to come through the heater, no losses. Don't do this with diesel fueled heaters though.


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