I've recieved my first delivery of Biodiesel. The fuel runs so well that the jets in my boiler have to be detuned. Currently, set on regular #2 fuel oil, they burn too violently on that setting. I need to get a smaller jet for less fuel usage. The boiler keeps on shutting down due to the flame being to hot.

This happen typically? or is it just mine?

I already went through a filter in about 9 hours of it getting topped off here at the house.

 

sorry to hijack your thread, but why are you running heat in JULY!

 

well you know, some people do enjoy hot water. In most cases, heating oil is used to heat up the hot water in the house as well.

 

Also turn up the pressure on the pump. That should help also. Keith

 

It sounds like the bio is a lower viscosity than heating oil. As you said, a smaller jet will probably take care of it. Maybe it will run cleaner and stop high limiting so much.

It seems like turning up the pressure would only make the situation worse by increasing the amount of fuel and then running even hotter.

I ran a batch of about 30% through mine a few years back. Mine was for heat only and it sat for the summer after the heating season. The next season I found a varnish layer in the metering system that was really hard to disolve and clean out.

After that mess and the bio being more expensive I decided to run straight #2. I'd be interested to hear if you find anything like that in your boiler after some time.

 

Some does not sound right , bio has less BTUs , so burns cooler , as for jet size it may be that its running lean , just like engines , running lean makes for hotter burning .
Just some ideas , I do not know for sure and have not put into an oil burner yet [ was planing on it , but mostly with the waste of making bio - the glycerin as fuel ] .
Just saying that you may want to continue to do diagnostics being that bio has less BTUs it should burn cooler .

 

I have an indoor coal/wood boiler with an oil backup. I called Riello, the maker of the oil burner, and asked them if i could burn Bio. They said I could IF I bought the bio kit that included non rubber seals etc.... But the Bio would quickly eat the rubber seals if the kit was not installed...

 

I have a friend that is a serious bio maker and we had to change the nozzle size to a smaller one and we upped to pump pressure for better atomization, made a big difference. You will eat up the rubber seals though, he has gone threw many pumps I think he has been experimenting for about 6 years.

 

Change all the seals, and o rings to Viton. Keith