Background / Requirement
In the manufacture of laundy detergent, a large amount of scrap is produced. Often this scrap results from the build-up of wet, warm or sticky detergent on the walls and surfaces of process equipment.
In this particular application, a slurry of detergent ingredients is dried by a spray dryer to a granular free flowing form. Hot gasses from the spray dryer are exhausted into a cyclone where hot, moist airborne particulates of detergent are separated from the gas and collected. Due to the high velocity at which these hot, wet particulates travel, they tend to build up on the cyclone wall over time due to impaction. This build-up can become quite thick and must be constantly removed manually.
Due to the cost of the detergent and problems encountered with trying to dispose of it, a suitable method of reclaiming the scrap had to be found. The large, moist core chunks of detergent scrap had to be size reduced to a granular form so that it could be easily reintroduced into the original detergent slurry.
Comil Performance
The Comil accepts up to 10 inch (250 mm) chunks of detergent scrap directly from the cyclone and reduces them to a granular, free flowing form at a rate of 7,000 lb/hr (3,200 kg/hr). The particle size produced is less than 1/8 of an inch (3 mm).
Summary
The Comil produced an excellent free flowing granular product ideally suited for reintroduction into the pre-dryer slurry. The warm moist nature of the product did not hinder the milling process in the least. It was found that scrap collected from other areas in the plant could be reclaimed in the same Comil. This is an excellent, trouble-free Comil application. |
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