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jheron
Joined: 11 Jun 2008
Posts: 31
Location: Wellington County Ontario Canada
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 Posted: Fri Feb 20, 2009 9:46 pm Post subject: Jon Heron's modified push/pull |
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Well I finally happened to be out in the driving shed with my camera to get some shots of my modified GL push/pull apple turnover... Let me just say I am not the best photographer!! 
I use a rotary vane vacuum pump instead of a venturi to create the vacuum. I do 100L batches in her and it seems to work great!
I am no plumber so don't mind the less than ideal plumbing...  The one I am working on now will be much neat and tidier!
The glass wine carboy is the collection vessel for the methanol and for the water when dewatering. The sight tube is made from a double wall PVC vacuum pipe with a steel helix in between the layers, so far it is holding up well.
I removed the insulation around the heat tape on the pipe leading to the top of the condenser and also the wiring as I needed it elsewhere this cold winter! The heat tape made a big difference in the amount of collected methanol. There is some steel wool in the 45 at the tank leading into the pipe going to the condenser, this was to try and break up any bubbles before they reached the collection vessel... so far so good!
The pump plumbing looks like a hodgepodge because it is! My last pump that was plumbed nicely inline with the inline heater and above the glycerin layer did not work well so I just aborted this pump in its place... As I said the next one will be much nicer!!
Note that I have 2 different feeds into the pump one from above the glycerin layer and one directly off of the dished bottom (was top) of the tank. There are also 2 inputs into the tank besides the down pipe for the push stage. The bottom input has a 1/2" stainless flex pipe (like found on a European or Japanese toilet connection) with the end crimped into a nozzle to help mix things up, it seams to work really well. I have to throttle the valve on it to keep it from bashing against the inside of the tank!
I have detailed my trials and tribulations with this thing here:
http://biodiesel.infopop.cc/eve/forums/a/tpc/f/919605551/m/1051036172?r=1051036172#1051036172
Well if anyone has any questions just fire away.
Jon
| Description: |
| Here is my rotary vane vacuum pump. The small brass valve is to regulate the vacuum pressure. |
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248.19 KB |
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1385 Time(s) |
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| Here is the bubbler I made to evaporate the last of the methanol after the push/pull. I power it off of my large pond compressor. |
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1635 Time(s) |
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| Here is the methoxide mixing and feed container. I mix by rolling on the floor and then carry over to the processor for inputting. The small valve to the right is the vent. |
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78.63 KB |
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1635 Time(s) |
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| Control panel, The big red lamp indicates when the heater is actually on not just when the PID is calling for heat. This will tell you if the SSR contacts have welded or if something else goes wrong in the heater cct. The switch is a manual on/off to turn |
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59.09 KB |
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1635 Time(s) |
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| Description: |
| Collection carboy and fitting on bottom of the condenser utilizing a rubber stopper which also works as a pressure relief. |
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88.42 KB |
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1635 Time(s) |
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| Description: |
| Here is the somewhat dissembled pipe leading up to the condenser with the heat tape. |
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74.39 KB |
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| Description: |
| Here you can see the down pipe for the push, I used to have a venturi in the top pump output pipe leading to it but I removed it when the results were not satisfactory. |
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66.73 KB |
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1635 Time(s) |
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| Description: |
| You can see the inline heater on the right, the octagon box is covering the heater terminals and the purpose of the round duct stuffed with insulation was to isolate the wiring I had to the water heater high limit strapped to the heater pipe. I later aban |
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72.39 KB |
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1635 Time(s) |
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| Description: |
| Here you can see the pump, flow switch and the small brass valve(should be plastic or glass) and graduated cylinder for adding the acid for the neutralization before the push. |
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78.42 KB |
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1635 Time(s) |
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| Description: |
| See the 2 pump inputs into the tank and the sight tube arrangement. |
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73.53 KB |
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1635 Time(s) |
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