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  1. #1
    Join Date
    Feb 2018
    Location
    Mantorville, MN
    Posts
    58

    Default New arch

    We are planning to make a new arch and stack this summer. Can someone please point me in the right direction for plans, best ideas, and steel to use?
    Thanks in advance

  2. #2
    Join Date
    Jan 2006
    Location
    Oneida NY
    Posts
    11,118

    Default

    What size are you thinking?
    Dave Klish about 400 taps, down from much more. Retired from collecting and boiling in 2021. Mostly because of a bad hip.
    2012 Mahindra 36 HP 4x4/ loader/cab/heat/AC:-)
    3x8 raised flue evaporator
    250 GPH converted to electric, RO by Ray Gingerich
    6.32 KW solar system, 1.48KW is battery backed up, all net metered
    website: www.cnymaple.com

  3. #3
    Join Date
    Feb 2018
    Location
    Mantorville, MN
    Posts
    58

    Default

    Quote Originally Posted by maple flats View Post
    What size are you thinking?
    Great question, I totally forgot to mention size. I have a 4x4x12 inch deep flat pan. It was not made for making syrup but it has served us well and we plan to keep using it. It holds 100 gallons when full but we usually cook at about half full. Even with the poor homemade arch we have been using, we can boil off 10-15 gallons per hour. Our problem is our stack is shot and our arch is far from air tight. Currently our stack leaves the shack straight out and then up about 14 feet. We plan to change the stack so it goes straight up and out the roof to maybe 16 feet. We are also thinking of adding a blower to the stack. We are also hoping to add a hood with a stack that will exit straight up and be about 3 feet from the smoke stack and about 2 feet lower in height. My brother in law welds and loves to fabricate but we want to do it the best we can.
    Thanks for asking!

  4. #4
    Join Date
    May 2011
    Location
    River Falls, WI
    Posts
    790

    Default

    Rule of thumb for flat pans is 1gph per square foot, so you should be able to do 16 on that size pan without too much optimization. Personally, I'd think you'll gain a lot of efficiency (for flat pans) by adding some length to your setup. For example a 2x8 would be the same size as your 4x4 and would probably evaporate a similar amount, but you'd be using more of the heat before it went out the stack. As such it would be more efficient. With that in mind, could you find another 4x4 pan? Make yourself a 4x8 and be in the 32gph range. Depending on how flat the bottoms are and how level everything is, you should be able to run them with only a few inches of sap in the pan and get a decent boil going.
    Second generation sap rat.

    Started taking over in 2012
    2012-2016: 300 buckets 120 on gravity tubing. Waterloo 2x10 wood fired. Averaged 105 gallons per season.
    2017: hoping for 300 on 3/16 with Shurflo and 50 buckets. New used 4x14 Algier wood fired cooker. 180 gallons of syrup

    2018: 300 on vacuum 2 buckets, finally got a splitter!

  5. #5
    Join Date
    Feb 2018
    Location
    Mantorville, MN
    Posts
    58

    Default

    I had been giving some thought to adding a 2x4 flat pan to use as a finishing pan. I thought of using the big pan to boil but have the sap drip into the smaller pan to maintain boiling. I try to batch cook about 150-250 gallons with each cook. Do you think this would help? I'm a little worried about how high my big pan would be to drain into the smaller pan.

  6. #6
    Join Date
    May 2011
    Location
    River Falls, WI
    Posts
    790

    Default

    With a 4' wide arch, I think you could probably keep adding pans until you hit 12' long and it'd just keep getting better. That might be bigger than you want to go, but any additional length will be a step in the right direction.
    Second generation sap rat.

    Started taking over in 2012
    2012-2016: 300 buckets 120 on gravity tubing. Waterloo 2x10 wood fired. Averaged 105 gallons per season.
    2017: hoping for 300 on 3/16 with Shurflo and 50 buckets. New used 4x14 Algier wood fired cooker. 180 gallons of syrup

    2018: 300 on vacuum 2 buckets, finally got a splitter!

  7. #7
    Join Date
    Feb 2018
    Location
    Mantorville, MN
    Posts
    58

    Default

    Another question. How big of stack should I make? 8-12 inch diameter? I plan in it being 12-16 feet tall.

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