We recently installed a dilute phase pneumatic conveying line from our production plant to the storage silo. The material we are conveying is 5 TPH of Hydrated lime (Ca(OH)2) which comes out of the production plant at 100 deg C. It's PSD is D50 8 microns. It is conveyed using 1200 m3/hr of air at positive pressure. The conveying is without any problems. The problem is with the bag filter on the top of the silo which gets blocked frequently. The filter area is 17.6m2 and the fabric is standard polyester with liquid repellant treatment 500 gr/m2.
The cleaning device of the bags is positive pressure puffs and it working perfectly.
The bags do not look blocked. No layer of material is seen to accumulate on them.
Is the problem with the size of the filter, the material of the bags?
What should I do solve the problem of the frequent blockage of the bags ?
Pneumatic Conveying of Hydrated Lime
Hello all,
We recently installed a dilute phase pneumatic conveying line from our production plant to the storage silo. The material we are conveying is 5 TPH of Hydrated lime (Ca(OH)2) which comes out of the production plant at 100 deg C. It's PSD is D50 8 microns. It is conveyed using 1200 m3/hr of air at positive pressure. The conveying is without any problems. The problem is with the bag filter on the top of the silo which gets blocked frequently. The filter area is 17.6m2 and the fabric is standard polyester with liquid repellant treatment 500 gr/m2.
The cleaning device of the bags is positive pressure puffs and it working perfectly.
The bags do not look blocked. No layer of material is seen to accumulate on them.
Is the problem with the size of the filter, the material of the bags?
What should I do solve the problem of the frequent blockage of the bags ?
Amit Segev ■