Theoretical study of the impact aimed at improving the efficiency of fiber cleaning

Abstract

Since cotton cleaning in Uzbekistan is carried out mainly manually, this paper discusses the methods and technologies established in the process of cleaning cotton and fiber. The process of fiber cleaning is one of the important processes that complete the technological process of cotton processing, given that the quality of fiber largely depends on the efficiency of this process, the research work on the mechanization of the type of collection and improving the efficiency of its cleaning is analyzed. In order to improve the efficiency of cleaning cotton collected on the machine, information is provided on the need to improve the equipment for cleaning fiber used in cotton gins. The research results are based on the need to replace a special structural device that guides the fiber to the correct tooth of the first sawtooth cylinder located on two drum cleaning plants. New fiber-cleaning equipment was installed in the Jizzakh regional JSC “Zarbdor cotton cleaning» and experimental tests were conducted in production conditions. In addition, the process of changing the pressure, density and speeds in the furnace and the effect of their cleaning efficiency has been modeled and theoretically analyzed, when the efficiency of cleaning the cotton fiber flow using a column system allows changing the raw material from 4 mm to 15 mm based on the device. By results of the conducted analysis it was shown that the increase of efficiency of purification depends on the device attached to the saw teeth, factor of the taxation of the distribution coefficient B and p 0 efficiency factor of increasing the initial pressure and coefficient of efficiency savings from the analysis of graphs, which present graphs of the distribution depending on the type of saw teeth. Based on the results of the research, recommendations are given for the widespread introduction of fiber cleaning equipment installed at enterprises of primary cotton processing, with the installation of a special structural guide device.

Study on the effect of cotton fiber temperature on cleaning effects

“…It was found that the cleaning efficiency of the equipment increased from 58.8% to 62.5% due to the increase in fiber temperature from 25 0 C to 55 0 C in industrial grade II cotton, and the cleaning efficiency at 56 0 S was 62.0%. A similar situation is observed in the experiments conducted on IV-industrial grade cotton [24,25].…”

Research on the geometric dimensions of fine pollutants in cotton

“…As a result of the increase in the volume of machine-picked cotton in Uzbekistan, the fiber quality has been improved. The most important indicators of the produced fiber are the contents of contaminants and defective impurities [7][8][9][10][11].…”

“…A number of researchers [7][8][9] have recommended the maximum number of cleaning repetitions in pile and sawdust drums to largely remove pollutants from cotton, and on this basis, the primary processing technology of cotton involves cleaning equipment. However, increasing the cleaning frequency by adding additional cleaning equipment could lead to an increase in defects in the produced fiber [10,11].…”

“…However, this pollutant classification is not enough to determine their bonding mechanisms to fibers to determine optimal separation conditions [9][10][11][12]. Therefore, the purpose of this article is to deeply study the relationship between the geometric dimensions, mass and number of impurities in cotton.…”

Investigation of air velocity in expanding and contracting pipes for the transport of fibrous materials

“…If the speed of the air flow is further reduced, then after 18 m/s the particles of fibrous materials fall to the bottom of the pipe and move unevenly, bouncing. The results of monitoring the process of air transportation of fibrous materials showed that the raw materials are unevenly transferred to the pipes of pneumatic transport [5][6][7]. As a result, the cotton moves in separate sections in the pipe, somewhere concentrated, and somewhere in a rarefied state.…”