Tree trash & Stump burning

I hope everyone is having a good week so far.

we’ve got over 100 cubic yards of tree trash and stumps. We just rented an air curtain and although it’s burning hotter, it’s creating more smoke.

has anyone found a better way of keeping a fire hotter but with less smoke?

I was thinking about laying a couple corrugated metal pipe angled downward from the base of the pit to level ground or digging a pit with one side sloped. Would be interesting to hear everyone’s ideas. Thanks in advance!

If you're burning green it's gonna smoke, burning at night helps

Run the blower a few days before lighting it to dry it out more....

Ronsii said:

If you're burning green it's gonna smoke, burning at night helps

Run the blower a few days before lighting it to dry it out more....

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What about burning in an open field in view of a highway? Isn’t it frowned upon to burn at night?

Aaron93 said:

What about burning in an open field in view of a highway? Isn’t it frowned upon to burn at night?

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That depends on your regualtions here they want you to burn after 6pm and be out by 8am but I have heard the opposite elsewhere

Beware of wind. Burn only on wet days. On one such slighty windy wet day the wind picked up about 20 mph and started drying the ground out and the top of trees. 200 yards away the tops lit up. It took knocking whole trees down with a loader to get the fires out. Large fires can last for days so day or night what difference does it make. Do it on a cloudy day... And make sure and hang around if your flames can be seen from space. lol...

I figure Aaron has already burned his 100CY but I thought I would share what little knowledge I have of air curtain burning.

Proper air curtain burning relies on the pit excavation. The manufacturer of the air curtain you are using should have a layout of the pit size, depth and manifold layout to optimize the burn and heat. It's all about the air curtain blowing across the top of the pit and creating a "vortex" inside the pit.

My situation is a bit different. The amount is much smaller I burn brush in a city, with burn permit. Large (for a city) 1 acre lot. Permit states no smoke. There's no way I can burn green stuff. It needs to dry for 6-8 months so I burn every fall. If I want to dispose of green it needs to be chipped or ground. I burned last weekend. One trick I use was to have my leaf blower (miniature air curtain LOL )sit at the fire just idling keeping the face red hot and burning. I fed the brush at the top of the burning face slowly and (by hand) and being dry , it lit right away and the blowing air kept it burning.
To me the secret is dry material, slowly fed, and don't "blow" the fire into a big pile of material especially if it green.