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Semelhante a Fuel filtration for diesels
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Fuel filtration for diesels
- 1. Fuel Filtration for Modern Diesel Fuels National Biodiesel Board Technician Outreach Program
- 4. Diesel fuel and its injection Common Rail Diesel and Unit injection fuel injectors operate at high pressures They are electronically controlled for optimum fuel metering and complete combustion End goal is cleaner diesel emissions
- 19. What could I see in a Diesel Fuel Filter? Severe water saturation High Water Concentration
- 23. What could I see in a Diesel Fuel Filter? Glycerin from off specification biodiesel Other contaminants like water and sediment
Notas do Editor
- Air enters all diesel systems and most of that time the air that comes in bring moisture with it. Air and moisture are the enemies of any fuel system—whether that system is petrodiesel or biodiesel. The presence of air will increase oxidation of the fuel over time. The best thing to do to minimize oxidation is to have good turn over of the fuel and not to store if for long periods of time. Most fueling systems do this as part of normal business, so it doesn’t end up being a problem. If there are systems where the fuel might stay around, fuel stabilizers are recommended as are desiccant dryers on the air vents which will minimize the potential for moisture contamination.
- Micro-organisms have been found in diesel fuel forever, and seem to be an increasing issue since the advent of ultra low sulfur diesel fuel. They grow at the water interface at the bottom of the tank, living in the water but feeding off of the fuel—whether that is petrodiesel or biodiesel or a biodiesel blend. If micro-organisms are present in a high enough quantity they can clog a fuel filter. They are relatively easily treated with a variety of conventional biocides which kill the organisms which can then be filtered out. Keeping the water out of tanks on a regular basis can go a long way toward reducing or eliminating micro-organisms. Filters with microbial growth appear black and slimy and typically have an odor different that is normal. There are a variety of microbial testing kits that users can buy to see if their fuel is starting to grow bugs. Its not desirable to regularly treat for bugs unless you actually have them, since you don’t want the bugs to develop a resistance to the biocide.
- The issue of water contamination is one that is poorly understood with biodiesel and biodiesel blends. This is primarily because of the issues with ethanol being water loving and people just automatically believe the same issues with ethanol exist with biodiesel. Pure biodiesel, B100, can hold slightly more water than diesel fuel—about 1200 ppm vs. 300 ppm) but even that is still a very, very small amount of water (0.12%) and is virtually the same as the amount of water gasoline holds (about 0.1%). In fact, biodiesel processors use the fact that water settles out of biodiesel, as many utilize a water wash step to helps to remove soaps and catalyst from B100. Data from NREL shows that B20 blends have similar water saturation characteristics as does petrodiesel alone. Both petrodiesel and B20 (or lower blends) hold somewhere between 100 and 300 ppm of water, with any more than that settling to the bottom of the tank. Keeping water out of tanks is always a good idea, and a good preventative maintenance program of checking tanks for water and if found removing that water is always a good idea for both petrodiesel and biodiesel.
- Here are some examples of filters that had high water content.
- Reading of the bullets is sufficient here.
- Reading of the bullets is sufficient here.
- Reading of the slides is sufficient here.
- Reading the slides is sufficient here.
- Reading the slides is sufficient here.
- You can use this handy checklist in the shop if you have filters coming in from the field and the user thinks it is a biodiesel problem. More than likely its not a biodiesel problem!