Troubleshooting to Fluidized bed operation

Posted by: FEIHONG Powders |on July 3, 2018

Problem, Cause and Remedy

PROBLEM	CAUSE	REMEDY
Dusting-powder blowing out of hopper	Air pressure too high	Adjust air regulator to lower pressure to fluid bed
Dusting-powder blowing out of hopper	Powder too fine	Too much reclaim added to virgin powder. Virgin powder pulverized too fine by manufacturer
No air-percolating through powder surface	Insufficient air pressure	Check air supply, increase air regulator pressure. Check air line size to equipment
	Plugged membrane	Check membrane for plugged pores from dirty air supply
	Obstructed membrane	Check bottom of bed for plastic, cardboard, or other large obstructions
	Compacted powder	Manually loosen powder and fluidize well with clean,dry air
Rat holing-air blowing large jet holes through powder surface	Powder level too low	Add powder until hopper is 2/3 full when fluidized
	Packed or moist powder	Manually loosen powder and fluidize well with clean, dry air. Check compressed air and booth air for high humidity
	Obstructed membrane	Check bottom of bed for plastics, cardboard, or other large obstructions.
	Plugged or broken membrane	Check membrane for plugged pores from dirty air supply, cracks, or holes.
Stratification-powder separating into layers of fine and coarse particles	Powder level too high	Remove powder until 2/3 full when fluidized
	Powder too fine	Too much reclaim added to virgin powder. Virgin powder pulverized too fine by manufacturer.