Difference between revisions of "Importance of venting a processor"

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<span style="color:red">This page will soon be completed by Mark following an intensive and extensive wiki lesson.
 
<span style="color:red">This page will soon be completed by Mark following an intensive and extensive wiki lesson.
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Only if he was paying attention.</span>
 
Only if he was paying attention.</span>
 
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From  http://www.vegetableoildiesel.co.uk/forum/viewthread.php?tid=28817
 
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[[File:NigelBs_venturi_cores3.jpg|250px|thumb|right|Pipe fitting venturi body and aluminium cores. By NigelB]]
 
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The Dr. Pepper method is so called because it was first carried out in an empty pop bottle previously containing that beverage, and the name’s stuck!
 
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==introduction==
  
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All GL reactors need to be vented to alow air to be displaced/replaced when oil/bio is added to or removed from the vessel.
  
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This is a very simple way of producing a small quantity of Biodiesel where the whole process is visible and provides what is probably the best available demonstration of the process.  For this reason it’s used by experienced home brewers to trail different oils or to replicate condition in problem batches.  Most importantly it’s probably the best starting point for anyone new to home Biodiesel production.
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It is important that the vent doesn't have a valve on it as it '''must''' stay open at all times.  
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For the novice, a few successful Dr. Pepper batches instils confidence, demonstrates the exact process without the need for special equipment and offers a good grounding in the basics of Biodiesel production.  To keep the process simple this page will detail a Dr. Pepper batch using new cooking oil.  This will enable the process to be completed without the complication of titration.
 
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==Safety==
 
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[[File:Collapsed processor 1.jpg]]
 
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Making Biodiesel involves a '''few''' hazardous chemicals.  If treated with respect these chemicals can be handled safely by the novice provided a few simple guidelines are followed.  There are an increasing number of chemicals being used in home Biodiesel production and all can be employed in the Dr. Pepper method, however as this page is aimed at the novice, we will stick to the least onerous and most widely available.
 
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==Chemicals==
 
  
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Oil … New, liquid vegetable oil, typically rape seed or sunflower oil.
 
  
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Methanol … available in small quantities from various chemical suppliers and on line auction sites.  Methanol is available in various purities.  Biodiesel requires Methanol at least  96% pure but preferably 98% which is quite widely available.
 
  
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Sodium Hydroxide … often referred to as Caustic Soda or lye.  This is available from many hardware stores, sold to unblock drains.
 
  
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Water … available from most taps!
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==Vent layout==
  
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The vent on a GL is normally on the vapor line after the condenser, this way any methanol fumes that are released during the reaction, or in the de-meth stage, will get condenced off and collected in the methanol collection vessel.
  
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Equipment
 
  
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An old saucepan.
 
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A large pop bottle (we’ll assume 1 litre for the purpose of this page)
 
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A measuring jug or some other container marked in millilitres.
 
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A stove or hot plate, preferably electric.
 
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A thermometer reading to at least 100°C
 
  
  
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Safety
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==Concequences==
  
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Method
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[[File:Collapsed processor 1.jpg|300x300|thumb|right|]]
  
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Testing
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If the vent becomes blocked it can produce a build up of possative or negative pressure.
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This can have sevear effects on the reactor it's self.
  
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Negative pressure can and will cause the reactor to implode like in these pictures.
  
  
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<blockquote style="background-color: pink; border: solid thick grey;">
 
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Quoted text here.
 
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==heading==
 
  
  

Revision as of 22:03, 30 January 2013

This page will soon be completed by Mark following an intensive and extensive wiki lesson.

Only if he was paying attention.



introduction

All GL reactors need to be vented to alow air to be displaced/replaced when oil/bio is added to or removed from the vessel.

It is important that the vent doesn't have a valve on it as it must stay open at all times.



Vent layout

The vent on a GL is normally on the vapor line after the condenser, this way any methanol fumes that are released during the reaction, or in the de-meth stage, will get condenced off and collected in the methanol collection vessel.



Concequences

Collapsed processor 1.jpg

If the vent becomes blocked it can produce a build up of possative or negative pressure. This can have sevear effects on the reactor it's self.

Negative pressure can and will cause the reactor to implode like in these pictures.







heading b

heading

Standard Cylinders
British
standard		 External diameter
of cylinder
(excluding insulation)		 External height
over dome		 Min storage capacity Expected port fittings
Direct Indirect
mm mm Litres Litres female, BSP
0 300 1600 98 96 1"
1 350 900 74 72 1"
2 400 900 98 96 1"
3 400 1050 116 114 1"
4 450 675 86 84 1"
5 450 750 98 95 1"
6 450 825 109 106 1"
7 450 900 120 117 1"
8 450 1050 144 140 1 1/4"
9 450 1200 166 162 1 1/4"
9e 450 1500 210 206 1 1/4"
10 500 1200 200 190 1 1/2"
11 500 1500 255 245 1 1/2"
12 600 1200 290 280 2"
13 600 1500 370 360 2"
14 600 1800 450 440 2"
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