Transesterification (alcoholysis) of vegetable oils means to replace the heavy glycerol for a lighter alcohol. It then results in FATTY ACID ALCOHOL ESTERS, (commonly known as “BIODIESEL”), and crude GLYCEROL.
B) REACTOR DESCRIPTION
The BD2 reactor is a single stainless steel vessel, pressurized, electrically heated and isolated batch unit, capable of either base, or base/base processes for transesterifying any vegetable oil, virgin or wasted one, with up to 7% acidity.
The vessel processes 63.5 gallon (240 liters) of vegetable oil/alcohol mix, delivering on average 53 gallon (200 liters) of Biodiesel and 10.5 gallon (40 liters) of glycerol, per batch, in approximately 11 hours.
The plant is skid mounted, self-contained, and can be powered by either 380V/50hz or 480 V/60hz; other voltages are available.
Oilless compressed air (10 psi) is provided by an innovative SA-T pendular oilless compressor.
Vegetable oil and alcohol are pumped through ball valves and visual level. The alkaline catalyst is pre-measured and then added to the alcohol. Proportions can be modified by the operator to fit different feedstocks. The strong and fast mixing is performed by one on-line mixer and two pumps.
Operator pre-set temperature and pressure values are kept automatically. Instruments, lights, fail-safe visual and sound alarms are incorporated into the control panel.
A pressure relief valve and a vent manifold allow outside venting to a service line, complying with both ambient and work safety requirements.
Metal bodied, spherical valves, are used throughout.
C) BRIEF BD2 MODULE’s PROCESS DESCRIPTION
The minimum M4 module includes one BD2-D flash dryer and one BD2 processor.
The dryer has identical body, assembly and size than the reactor, but includes one venturi type vacuum pump on top.
The previously well settled, cleaned and filtered oil, is pumped into the dryer, which heats and dehydrate it by boiling the bonded water at relative low temperature under limited vacuum.
At the BD2 processor, the alcohol is pumped into the vessel and the mixing starts with the vent valve opened. The catalyst is first pre-measured by titration of the feedstock, and then poured into the vessel to mix.
The hot vegetable oil is then pumped from the BD2-D dryer into the reactor; the reactor’s pipe heaters (belt type) turned on, and finally the vent valve closed.
The mixing continues under selected conditions of temperature and pressure during a stated period. Once finished, the mixture settles under pressure, until the separation of the glycerol and the liquid alcoholester occurs.
The resulting glycerol is first extracted applying air pressure, and the remaining Biodiesel is pushed through a 5 microns filter before being stored.
* Total period process is around 11 h, then 2 batches per day can be done in the BD2 reactor
* More production can be reached by adding external pressurized settling tanks
-The methylester produced can reach the ASTM and EN 14214 standards.
E) BD2 REACTOR SPECIFICATIONS
Dimensions: – 29 x 34 x 73 in. (730 x 860 x 1845mm)
Weight – 250 lbs. (125 kg)
Total volume – 72.5 gallon (275 liter)
BD production – 53 gallon (200 liter)
Glycerol production – 9/10.5 gallon (36/40 liter)
Centrifugal mixer pump – 1 HP motor, shield against flame
Electrical pipe’s surface heaters – 4.5 kW
Module’s energy consumption per liter – 50/60 Wh per liter
Working Compressed air pressure – 15 PSI (1 bar)
**Specifications may change without notice.
For Inquiry and Request for Quotation, please email:
Jess C. Gregorio