Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 30455
Air Pollution Control from Rice Shellers - A Case Study

Authors: S. M. Ahuja

Abstract:

A Rice Sheller is used for obtaining polished white rice from paddy. There are about 3000 Rice Shellers in Punjab and 50000 in India. During the process of shelling lot of dust is emitted from different unit operations like paddy silo, paddy shaker, bucket elevators, huskers, paddy separator etc. These dust emissions have adverse effect on the health of the workers and the wear and tear of the shelling machinery is fast. All the dust emissions spewing out of these unit operations of a rice Sheller were contained by providing suitable hoods and enclosures while ensuring their workability. These were sucked by providing an induced draft fan followed by a high efficiency cyclone separator that has got an overall dust collection efficiency of more than 90%. This cyclone separator replaced two cyclone separators and a filter bag house, which the Rice Sheller was already having. The dust concentration in the stack after the installation of cyclone separator is well within the stipulated standards. Besides controlling pollution, there is improvement in the quality of products like bran and the life of shelling machinery has enhanced. The payback period of this technology is less than four shelling months.

Keywords: Air Pollution, cyclone separator, pneumatic conveying, Rice Sheller

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1108014

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2878

References:


[1] P. Pillayer, “ Rice Post Production manual, Wiley Eastern Limited ,1984
[2] S. M. Ahuja, Powder Technology, 204, 48-53 (2010)
[3] M. E. Fayed, L. Otten, “Handbook of Powder Science and Technology”, Van Nostrand Reinhold Company, New York, 1984
[4] R. Jackson , Mechanical Equipment for Removing Grit and Dust from Gases , Cheney and Sons ,Banbury, England (1963)
[5] R. H. Perry and C. H. Chilton, Chemical Engineer’s Handbook, 6th edition, 1984.