EFFECTIVE CLEANING AND GINNING OF LOW-GRADE COTTON IN A SAW GIN

Abstract

To increase the gin's productivity by effectively cleaning low-grade cotton from small trash impurities in a saw gin, an industrial-experimental sample of a grate of a new design was produced. The manufactured industrial-experimental sample was installed on a 90-saw gin feeder at the “Boyovut techno claster” LLC cotton ginning enterprise in the Bayavut district of the Syrdarya region, and the gin was improved. Comparative-research work was carried out on a 90-saw gin with a feeder with a mesh surface operating in the workshop with an improved gin. Experimental work was carried out with a distance of 16-18 mm between the spiked drum and the grate bars on the feeder and a distance of 8 mm between the grate bars on the grate bars.

When cleaning cotton of the 2nd class of the III grade of Sultan breeding on the improved grate feeder of the saw gin at the above-mentioned intermediate distances, the contamination of the cleaned cotton averaged 1.3-1.35%, and the quality of the cotton improved by an average of 0.09 (abs)%-0.07 (abs)% compared to the cleaned cotton on the mesh surface feeder. The cleaning efficiency of the feeder during cotton cleaning averaged 21.7-18.7%, which is on average 2.9 (abs)%-2.3 (abs)% higher than the cleaning efficiency of the feeder with a mesh surface. The fiber contamination after ginning averaged 3.48-3.62%, which is on average 0.12-0.15 (abs)% less than the fiber contamination obtained from gin with a mesh surface feeder. When ginning cotton, the gin's productivity averages 863-916 kg/hour, which is 42-48 kg/hour higher than the existing spiked drum gin.

When cleaning the post-djin fiber on a 5VP cleaner, the fiber contamination averaged 2.93% and 3.0%, the fiber quality improved by an average of 0.21-0.19 (abs)% compared to the fiber produced on a mesh-surface post-djin cleaner, and according to the state standard UzSst 604:2016, grade III belongs to the “Superior” class. As a result of the research work carried out in production, it was studied that the improvement of the gin feeder cleaning with a grate with a long arc length and a grate gap of 8 mm leads to an increase in the efficiency and productivity of cleaning the gin when cleaning low-grade cotton, improving the quality of the produced fiber.