When I build the centrifuge for the vegetable oil I can't imagine how effective it can be.
I started (after the test of wich I wrote in the last post) cleaning a mix of unknown cooking oils, the problem was that in first time I found a oil mill that started to collect waste oil to re-sell after a simple "winterization".
Their idea is to cool it to make the longer and heavier fatty acid chains solidifiy, then remove them from the rest of the oil and sell it as industrial oil.
I know that the Austrian region of Karnten bought it massively to convert it in BioDiesel (that because Italy is ruled by idiots, then we have a huge amount of byproduct we can use to create fuel, but we don't use it...).
A part of it can be sold in Italy, then I bought initially 500l of oil for testing and that batch was great, very clean oil.
Then, next year I bought 1000liters, and that was simply shitty.
I don't know if they weren't able to winterize it or if simply they sell the oil directly as they collect it, the fact was that I can't run more than 500km on a fuel filter.
Since it cost about 35€, it was a problem...
I started trying to filter the oil, but it was too costly, because of the amount of dirt.
Then I found the "centrifuge concept" on You Tube,and I decided to make my own one.
It worked flawlessly at the first try.
All the dirt remains inside the bowl, the oil I cycled in it was tested and the test says that there aren't any particle bigger than 5micron, I can't remember the quantity of them but it was very low.
During winter I discovered that it can separate perfectly also the solidified fraction of the oil (having a mix of unknown oils, it was a wonderful thing, because after a cold cycle in the centrifuge I can eliminate about all the part that give me problems in cold season (the heavier part condensate in flakes that clog the fuel filter about instantly).
The oil without those heavier fractions allowed me to cold start without problem (at first try) my old car even with -18°C.
95%oil, 4.2%petrol,0.5% diesel antifreeze additive and 0.3% acetone in the tank, that morning).
For comparision, my parents had a Renault Laguna with a 1.9DI Diesel, with 100% "artic" diesel in the tank, and we need starting spray to make it run, that morning...
However.
Today arrived the rubber rotor (spare part for a Marco Pump, I see that someone uses those pump make for turbine engine).
I have to make a CAD drawing of the pump to build it on "my" Mori Seiki NL, at job.
I need it to be simple, to cut the costs down.
This is something like a test, but maybe, if we decide to put the centrifuge on the market, building the pump body it can be a goal to keep the costs down.
I designed it starting from a round 80mm aluminum bar, with the "pump chamber" from a 50mm AISI304 bar.
A very simple design, made to be coupled (for the moment) with the electric motors that normally drive the ROTOFLOW pumps that someone here uses for the turbine engine.
This because I have some of them I had for free from an uncle that works for the coffee distribution business.
Also, making the pump in home allows me to modify it to run with the centrifuge motor, in a future.
Another idea to keep the costs down, a couple of pulley and a belt on a slightly powerful motor costs just a little less than a second motor.
