That looks similar to my 2" plastic drain line if my gasifier is cold. I like to dump it when it is warm. When it is hot it comes out fast and runny.
I don’t know If we have a thread for embarrasing moments. Anyway this is what happened yesterday.
The truck had been sittning for maybe 1.5 hours. I opened the lid to poke down some shrinking and glueing. I was only a couple of miles from home and I decided the chunks in funnel area was enough.
I did as I’m used to. I cranked up and drove off on the stored woodgas, hybrided for a while but was back on 100% wood in a couple hundered yards. That’s when the hopper sneezed, only this time it was a loud bang and I lost all hopper vacuum.
I stopped at the roadside. The hopper was smoking like a chimney and the lid was gone
I started walking and found the lid with a broken hinge 200 yards behind the truck in the ditch. Meanwhile several cars had stopped and I found myself in a situation where a lot of explanation was out of the question. I just told them the truck is so fast on wood the lid was ripped off by the wind
I went home on dino with a smoking hopper and the tail between my legs
Edit: Last night I made a new sturdier hinge and even went for a testdrive I wouldn’t like anything like this to happen while in town
The thing I have noticed causing the high pressure sneezes is excess spring pressure on the hopper lid
The guys using a leaf spring type lid have loud bangs
I am using a single 1/2 inch diameter by 6” long coil spring and the very few times it puffs is hardly noticible.
A 1” wide soft silicone gasket will seal airtight with minimal pressure
Wow JO, That’s a good one. You put it on the correct thread, your 91 Mazda B2600. Your explanations, I have to give you 10’s for scores.
Driving home with Smoking hopper and the Tailgate between your legs, another 10 for score.
You are in the lead for embarrassing moments for this year’s competition.
Correct. I’ve had problems lately making my lid seal. I have a weak spring too but the frying pan doesn’t allow for a wide enough gasket.
Also I think letting air in while poking down in an almost empty hopper and then pull start things allowed for maximum space and perfect conditions for a big bang.
Right, anyones embarrassing moments are welcome here. This is the right place
Haha, what I meant by keeping our OOPS, on our own threads is it helps everyone under stand what is going on with each ones builds, and what they are doing to correct it. No custom gasifier is the same in the build or in operation of running it. They all have their own quarks to them. It is a learning experience for everyone reading about the happenings, the positive and the negative ones, as long as no one is hurt it 's good reading and learning.
Yes a frying pan would be a challenge to seal
I managed to find a LARGE SST salad bowl, sandwiched washers and silicon rubber gaskets at top center (so it can rotate and self level) and it has a 3/4” wide flat rim for the seal.
My first several attempts for laid all leaked and I had many BANGS.
Yup all you need is a 1 to 1 air / gas ratio in the hopper, ignition and it is magic… BOOM!
My big hopper lid is more of a Rumble, Rumble Fart, but maybe I just haven’t had the perfect
BOOM ratio. I hope it never happens.