Problems with the feeding plate in the rotary kiln?
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Our company has installed a new rotary kiln that uses alcohol-based fuel as its fuel source for internal heating. The inner diameter of the rotary kiln is 800 mm, and heat is applied in a counter-current manner; the heating temperature reaches 700 degrees. Silica-containing filter cakes with 40% moisture content are fed into the kiln. The interior of the rotary kiln is lined with refractory material, and it is equipped with distribution plates throughout. During operation, it was observed that after the materials were dried and calcined to form powder, 80% of them did not exit the system; instead, they remained trapped in the labyrinth seal at the feed end. I am wondering if this is caused by the material lifting plate, given that the wind speed inside the kiln is 2 m/s. I was wondering if experts in rotary kiln operation could offer some suggestions.
Even with the speed set to 5 revolutions per minute, it still doesn’t work. The bulk density of the collected powder is 0.9; it’s a quite heavy powder. I’m not sure what the reason for this is
The rotation speed is related to the angle of the Yang material plate
The rotation speed is related to the angle of the Yang material plate
The inclination angle of the rotary kiln and the wind speed can be increased appropriately
I’m not sure if there is a feeding screw at the material inlet side of yours; the humidity of the material there is high and its flowability is poor, so a preheating zone can be installed in the section where the feeding screw is located.
In the design specifications for chemical rotary kilns, there is a calculation for the residence time of the material on the tray; what do parallel flow and counterflow mean when selecting the value of k?