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Thread: CDL hobby working slow

  1. #21
    Join Date
    Mar 2012
    Location
    Walpole, NH
    Posts
    862

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    Have you changed your pre filters a couple times threw out this course of washing to make sure flow isn’t being reduced as crap comes out of the membrane?
    Sugaring for 45+ years
    New Sugarhouse 14'x32'
    New to Me Algier 2'x8' wood fired evaporator
    225 Sugar Maples Currently,(105 on 3/16" and 110 on Shurflo 4008 vacuum, 10 gravity), (16,000 before being disabled)
    1947 Farmall H and Wagon with gathering tank
    2012 Kubota with forks to move wood around

  2. #22
    Join Date
    Apr 2017
    Location
    Pittsfield, NH
    Posts
    38

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    Not though out the wash. Pressure isn't more the 10 psi different before and after the filter
    Matras Maple

    Started 15 years ago as backyard operation.
    Now have a 1100 taps and growing. CDL hobby 250 ro.
    New for 2018, a 2.5x8 leader infurno with steamaway.

  3. #23
    Join Date
    Mar 2013
    Location
    Thetford, VT
    Posts
    264

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    We run a CDL 250 Hobby. The only time we get near 200-225 is at the end of the year when the sap is cloudy and we are running more than 500 gallons of raw sap through it. We run our sap through twice and sometimes recirculate to get close to 8%. I will at times run the concentrate a little richer, but nothing like mentioned here. I normally only do that on the first pass and in an effort to get to 4%. We have had our membranes tests a couple years in a row and let them go with storage solution once. They have always tested above 100%.

    We do a regular wash cycle at the end of each day of running...new filter, 50 psi rinse for 10 minutes or 100 gallons of permeate, 40 psi wash with about 11-12ph (starting in the mid 70 degree range and the warming the solution up to get at least 10 minutes in the low 80s then warm it up until 84 when it shuts down), then a final 50 psi rinse for about 150 gallons. This has always worked well for us.

    Mike
    Tapping since 1985 (four generations back to early to mid 1900s). 200-250 taps on buckets and then tubing in the mid 90s. 2013- 275 taps w/sap puller 25 gal. 2014-295 taps w/sap puller 55 ga. (re-tapped to vacuum theory) 2015-330 taps full vac. 65 gal, 2016-400 taps 105 gal, 2017-400 taps 95 gal. 2018-additional 800' mainline and maybe 400 new taps for a total near 800 taps. 2x6 Leader WSE (last year on it) supported by a 250 gph RO.

  4. #24
    Join Date
    Mar 2013
    Location
    Belleville, Ontario
    Posts
    43

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    We are the same as VT K9. I have had my CDL 250 for 4 years. This year replaced the membranes. Whole other story. Today I have processed 1000 gallons of sap on the first pass started at 1.7%. Then a 150 gallon rinse and start processing the first pass a second time to about 7...+/- brix. the Conc. flow was at 1. Prem 1.5 We double pass all our sap. Pressure is never over 175 psi. Runs mostly around 100 psi at the start after a rinse and finishes around 175 psi after the 500-1000 gallons have gone thru. WE only do a wash if the pressure get close to 200 psi. (CDL soap 3 large table spoons - PH 12 with test strips, start with warm water 70 degrees and run till machine stops are 84 degrees.) 400 gallon rinse.) Maybe 2 to 3 times thru the season. However we do 50 psi of 150 gallons rinses everyday, or between passes. We have 800 taps on high vacuum so we are always waiting on the RO. I have talked to both my rep and a CDL tech many times over the flow rate. The 250 flow rate is base on a measure when your rinsing. Conc. 4 gpm and Pem 2 gpm for a total of 6 gpm x 60 =240. I can assure you 100% you will never see that number when concentrating. With a fully washed membranes, new or not my machine is around 1.25-1.5 on both flow meters. meaning 150-180 gph. That is what you will see. Anything else upgrade like I am doing.
    2016 Added additional 75 Taps (800 total)
    2015 Tubing installed 700+ taps
    AirTech Vacuum Pump and CDL extractor
    20x36 Sugarhouse built (and still not big enough)
    250 CDL Hobby RO
    2014 2x8 Cross flow
    300 taps+
    450 Honda ATV
    2013 3x4 single pan
    50 taps
    40L Made last year off propane and one pan

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