Forum Coffee Roasting

chaff burned in the cyclone, really. what's to keep from burning?

dua minggu yang lalu

good afternoon, everyone.

So this morning that happened to me almost a heart attack. More roasting Batch-3, suddenly coming out thin smoke from the cyclone direction. I immediately stop roasting, shut down the machine, keep checking.

When the chaff comes off the Collector, there's a couple of blobs of burnt chaff, some of them still small embers. Lucky for us, a quick break before it gets worse.

My machine custom local hood 3kg. If you think about it, maybe it's because:
1. I'm fine. Chaff Collector, it hasn't been drained in two weeks.
2. Batch to -3 immediately after batch to -2, pause only 5 minutes
3. Or there are other problems I don't quite understand.

My question:
- Is this normal or did I do something wrong?
- Ideal frequency clean cyclone.
- When this happens, the safest way to kill the fire. What's wrong with water?
- Anyone ever get to burn seeds in a drum? I'm worried about the effect on the long-term machine.

Please help me, it's making me want roasting again

950 24 0

dua minggu yang lalu

oh, my God. This happened to me two years ago. And I'm telling you: that's not a weird thing, almost all roaster has been on its way for at least once. But it's true. I haven't cleaned in two weeks. I'm usually a 3-4 batch once-in-a-race, if the batches are medium- dark even every two batches.

dua minggu yang lalu

that chaff is a very dry organic material, low burn point. It's like a stack of dry paper. A small splash of roasting or residual heat from the previous batch could be enough for an ignore. Plus the airflow in the cyclone is spinning, so if a small ember comes in, he gets hit with the fan on the wall. The most dangerous combination.

dua minggu yang lalu

i just found out about this spot on the fire. I clean up the cyclone once a month and I think it's safe. But with that explanation.

dua minggu yang lalu

sebulan sekali itu terlalu jarang kalau lo roasting intensif. seberapa banyak batch per minggu? kalau di atas 10 batch seminggu, gue rekomendasiin bersihin minimal 2x seminggu. chaff accumulation itu cepet banget terutama kalau banyak roast natural atau honey process karena chaff-nya lebih tebal.

dua minggu yang lalu

i'm about 15-20 batch a week. hell, i've been playing with fire this whole time without knowing. just set the reminder every monday and clean it up.

dua minggu yang lalu

when it comes to beans in drums, I've done worse than chaff. Last year when I was roasting Mandheling dark, Coming home. The smoke is already thick from inside the drum and some seeds are already black, the surface is shiny like ter.

The cause: I forgot to put the gas down after first crack. So the gas is still high, the seeds keep getting extreme heat unattended. One completely scorched batch, and one more stifling: It took me three days to get that deposit.

dua minggu yang lalu

brother Budi, the carbon deposit in the drum is the effect of the next batch of coffee. I'm afraid that if there ever was such a thing then the drums weren't perfect, the next batch goes off-flavor.

dua minggu yang lalu

there's influence, pretty significant. A couple of batches after that. My coffee results have an unusual smoky hints. I usually check with roast for cheap coffee first 2-3 batches as a "scientific batch" after the incident, before ZZZCF002Z bean is good again. Just think of it as cleaning the engine.

dua minggu yang lalu

oh, there's a "sacrical batch." i hope there's no need for that

dua minggu yang lalu

okay.
1. clean chaff collector every 3 batch of MAKSIMAL, if roast dark even 2 batches
2. There's always a 8-10 minute gap between batches, not just for machines, but also for mastiin chaff. The last batch is set and no embers active.
3. I put a little bucket of sand next to the machine. If there's a cyclone ember, I put it in the sand, not water.

Don't just flush the water into the hot metal chaff Collector. thermal shock can deformation metal. sand or cover all the vents first to die alone is much safer.

dua minggu yang lalu

i've had lighter versions: thin smoke from the cyclone but when checked there's no embers, just chaff scorched. Turns out it's one of the first signs that should be directly responded. I immediately compress a clean schedule after that. It's more dangerous: It happened in the middle of the night. If I had stayed asleep for a while, it would have been different.

dua minggu yang lalu

this is happening in the big production machine or smaller machines too? I used a roaster sample and no traditional cyclone, so I thought this was a problem that was only relevant to the big machine. Or am I wrong?

dua minggu yang lalu

small machines also have chaff collection system, maybe different forms but the same function. Ikawa, Kaffelogic, even the small roaster drums all have a dump of chaff. Still needs to be cleaned up routine. Same points, fried organic plus hot + airflow. Engine size reduces risk but doesn't mean zero.

dua minggu yang lalu

the unspecified tip: Place a small smoke detector near the ZZCF001Z. I bought a cheap one at the electric store around 80rban. I've helped the detective twice before I came here. Especially when left standing sometimes. It's not expensive and worth a lot of peace of mind.

dua minggu yang lalu

i want to make sure about what was asked at the post: if there was really a fire at the chaff Collector and couldn't stop, what was the first thing to do? Is the engine off first, is the vent cover first, or is it an APAR? I'm afraid the missequence is making it worse.

dua minggu yang lalu

the sequence I applied: 1) Turn off the gas / heat source directly, 2) Turn off the drum but don't turn off the Zairflow first because airflow helps to aim the smoke out and not let the smoke get into the room, 3) open the chaff Collector carefully with gloves, 4) If there's a small ember, put it in the sand or the metal container is closed. Only when the fire starts spreading. Water is the last option.

dua minggu yang lalu

thank you, Brother Ahmad. This is the most clear explanation of the order. I put it on sticky note and stick it on the machine deck.

dua minggu yang lalu

well, technically curious: chaff has an autopsy temperature about 250- 300C depending on his ZZZCF002Z. If the chaff was so dry, the point could be even lower. And in the cyclone, the temperature can be a local spike, especially if there's a airflow that mixes the chaff to a point. So the combination of dried + heat residual.

dua minggu yang lalu

a little different opinion about framing the problem. I think that chaff burns more often than not from airflow. That chaff passes to large-scale cyclone means there's a problem on fan speed or duct. If airflow is optimal, chaff doesn't stack that much. So in addition to cleaning, check if fans and dudes are in good shape.

dua minggu yang lalu

i'm gonna send Tommy a tip about the smoke detector. I've been putting this up since last year, and last month it actually sounded when there was smoke from the chaff in the batch to five nights. I'm sleepy and probably won't notice the visual. So buy it, it's a hell of a lot cheaper than losing if the machine gets hit or worse.

dua minggu yang lalu

a lot of useful information in this thread, I'm trying to make a long read:
- Clear chaff Collector max every 3 batches, dark roast every 2 batches.
- break between batches at least 8-10 minutes
- Get the sand bucket next to the engine!
- Put a smoke detector on.
- Check fan conditions and constant conditions, not just the chaff.
- If the seed burns in the drum, do "sacred batch" before the roast is essential.
- Fire sequence: kill gas first, airflow on first, handle embers

Good luck and stay safe everyone!

dua minggu yang lalu

i got paranoid and cleaned my cyclone this afternoon when I just got roasting. And it turns out that the chaff was pretty much there, and I was surprised myself when it was only five or six days ago. I think I'm roast more than I thought. From now on it's mandatory to clean every 3 batches, not be mistreated.

dua minggu yang lalu

one thing we haven't discussed: long-term impact on machines when there's often overheating in cyclone. gasket and seal systems pyrolysis can harden and crack faster. i got a pretty big service charge because the seal was leaking, so it's not just about the safety, it's about the cost of your machine ownership.

enam hari yang lalu

Put the suppression system in the clone + drum so the protection if there's a fire

chaff burned in the cyclone, really. what's to keep from burning?

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