two more failures one finding an updraft gasifier can work , a down draft gasifier can work . But an updraft and down draft at the same time does not work . I found an internal leak . I need to bypass the hopper heater It has a leak that is reducing the down draft …
Pipe from cyclone . donut ball of tar . opened gasifier chipped out fuel from gasifier . used 1/4 inch screen , put fuel held by screen back in gasifier . used both propane and map gas torch to light gasifier . had successful run , low power 48 amps at 48 volts . I think I must have developed leak on engine side of intake manifold . air mix pulsing air , very low vacuum .
running on three out of four cylinders 2,3,4 . had 110 amps at 48 volts .Run ended after rubber pipe connectors melted . one melted patched it , next in line melted wrapped a lot of wet gloves around it , third in line melted , run ended .
Have temperature probe on order . grate shaker took temperature probe out . using Sea Foam .
For those searching this topic for moisture issues, see 1961 Land-Rover Series II post 64 and Gasifier the hive post 26.
the auger has failed on every run , I wanted to run for an hour , The run lasted a half hour . Today I emptied out fuel hopper and reset auger . I hope this time the auger will not imitatively come apart as it has all the other times , when I get it back together . I put some parts under water after the fittings melted . I replaced the fittings with metal parts and aluminum foil .
The gasifier actual ran on cool side under 700 c .
The blower to the flare caught fire , so I thought it was time to turn on the engine . Turned off gas to flare , turned off blower , blew out fire , turned on ignition , turned on gas to engine and started engine . I reconnected air preheat , gasifier had temp of 700 c . Run lasted 15 minutes . Not sure why it stopped . Do not have blower for flare . Need to make more fuel .
Your setup looks imbertish to me. Nothing wrong with the imbert.
I think you will appreciate a visit to my site where I show the evolution
of my imbert gasifier on a 4’ x 4’ platform. I ran into some burn
problems, but ironed them out for a successful imbert gasifier. Some of
it a similar approach as yours. It took me a long time to iron out the
crinks but I ended up with a great imbert burner. Check out “My first small
engine run” in the Small engines section.
Do you have a grate shaker? Maybe it got plugged up?
One way to troubleshoot would be to try to flare again, as soon as the engine quit.
No flare= bad gas.
It appears that your flaring blower failed, so maybe you need to take a step back fix that first anyway.
Why did the blower catch fire? Shouldn’t the gas be too cool for that by the time it reaches a blower?
I opened bottom of gasifier and took out char material . fresh fuel was in gasifier but none would fall to bottom . I could not reach . I poked it with wrench and it all dropped down . The auger failed , I will extend auger . I would put in grate shaker but want to get auger working first . Found the temp probe is sticking into the heating tube for incoming air . Pepe actually did use copper tube for air preheat . Capacitor blew out on fan , small scorch mark on circuit board . plastic fan blade melted and shredded , other blower is fine . no idea when I will get back to work on this .
Henry, Thanks for posting your updates. Your unfortunate troubles have given us some real life examples for this troubleshooting topic. We patiently await your next steps.
some time ago engine backfired and blew hose off blower , this could have damaged fan . I could have installed backfire preventor , I just did not purchase inch and a half cross fitting to install it .
I think I was having difficulty starting engine and restarted blower to draw more gas .
You should shut off flare before starting engine , But if engine does not start , you lost all flow thru gasifier .
I think at this time due to internal leak in hopper heater gasifier was both updraft and down draft .
I suggest you place a spring loaded pressure relief valve
in the blower line, might prevent blow aparts.
Have one just did not install it . Like you I had to use over head hoist to dismantle , reassembly gasifier . When I bypassed hopper heater I found a tube blocked with a donut of tar so it could be the hopper was not sealed but was path of most resistance , when the normal path got blocked gas flow went thru hopper bypassing cyclone . I have put extension on auger , tried brazing . side of cast to steel took . side of cast to stainless steel did not , should try nickle silver brazing rod . Just trying to put it together again .
Last run , started engine at 417 c . Installed grate shaker . auger cycled and grate shaker came out .
shut down and put hitch ball off truck in hole in gasifier . restarted gasifier restarted engine .
Power at 48 volts was 150 amps . I had found 4 inches of nickle silver brazing rod used all but 1/4 inch . Auger pulled out of chuck . repaired auger about 5 times in 45 minutes . gasifier reached 700 c
I moved the flare and fan past the engine . I now see this as a mistake , as all tar from starting gasifier winds up in engine . I will consider making a second forge blower flare and moving it out of the building . I will still start engine at over 400c . Matt said something about not using engine to pull temp up to operating temp of 700c . So far there has been no other way to bring gasifier to 700c .