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Then, statistical analyses of obtained regression equation were a) Experiment errors;
carried out (3): b) Value of regression equation coefficients (3)
References:
1. Shershnev, P. P., - 1998, Russian Federation Patent - No 2108147.
2. Kablov V. F., Jeltobryukhov V. F., Mikhalchuk T. A., Kargin Y. N., - 2000, Russian Federation Patent - No 2148024.
3. Karayev S. F., Shikhaliyev K. Ecological issues of oil and oil products and new methods for treatment of oil and oil products from water surface, Hannover (in Russian), - 2014, P. 444.
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7. Aliyeva S. F., Chemistry J. and petrochemistry (in Azerbaijani), - Baku, Elm, - 2004 (3), P. 60-62.
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9. Yusubov F. V., Chemistry J. and technology of fuel and oil (in Russain), - Moscow, - 2007 (4), P. 16-18.
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Parpiyev Azimjan, Tashkent institute of textile and light industry, doctor of technical sciences, professor, E-mail: [email protected]. Kayumov Abdul-malik, Tashkent institute of textile and light industry, research associate — the competitor, E-mail: [email protected].
Pardayev Hanimkul, Tashkent institute of textile and light industry, Ph. D., Associate Professor, E-mail: [email protected]
Effect of temperature of steady heating components of cotton-seed at drying process
Abstract: The problem of temperature regime effect on the heating cotton-seed components in the drum (cylindrical) dryers have not been studied profoundly. In the article were received mechanisms (principles) of heating cotton-seed components in the drum dryers in relation to the initial of cotton-seed humidity; and mechanisms (principles) of efficiency ofmaterial which is drying. Keywords: drying, cotton-seed, fiber, seed, temperature, heating, humidity, uniformity.
Introduction: One of the present-day quotes in organization of dry process is studying the heating temperature of cotton-seed components at process of its thermal deprive. Apparently, the less temperature of heating amount is the less probability of getting worse of its natural properties.
There [1] have been determined the mechanisms (principles) of initial humidity and temperature of dry agent on the heating of cotton-seed components. But the productivity of dry drum with humid cotton-seed has not been taken into consideration in the article, and the research was done by initial humidity till 14%.
Experimental researches: Our researches were done on the dryer 2SB-10 with humid cotton-seed by dry agent temperature T=100 and 200 °C, by productivity 3,5 and 10 t/h. The research object was cotton-seed of variety C-6524, and industrial sort II, with initial humidity W=10,5 and 22,3 percent.
Tests have been done in-one, two, and three times (multiply) drying.
Analysis of receiving regress equations shows that all accepted factors have been highly influenced on the output parameters either independently or during interaction.
Processing of experiments results on the computer let us to get the individual regress equations for each dry multiplicity [2].
The regress equation for the one-time drying of fiber heating temperature is:
Y=47,7-4,29X1-3,79X2+11,2X2-0,79X1X2-2,79X1X3 -
-1,29 X2X3
The regress equation of temperature of heating seeds: Y=41,08-3,41X,-2,33X+9,58X3-0,83X,X-1,91X,X3-
c ' ' 1 ' 2 ' 3 1 2 ' 13
-0,83X1X2X3
The regress equation for two-times drying of fiber temperature heating is:
Y = 59,6-5,12X1-6,5X2+12,9X3-3,5X1X3-1,87X2X3 The regress equation of temperature of heating seeds:
Yc = 53,16-4,75X1-5,75 X2+11,0X3-2,75 X1X3-1,25X2X3 The regress equation for three-times drying temperature of heating fibers:
Y = 74,37-6,875X19,12X2+ 19,37X3 -4,75X1X3-2,12X2X3 The regress equation of temperature of heating seeds:
Yc = 68,75-6,5X1-7,25X2 + 17,5X3 + 4,75X1XJ-1,5X2X3
Section 13. Technical sciences
Test results allowed (permitted) to determine exactly, that more intensive cotton-seed heating take places at parallel drying than the other variants.
Results analysis: Digital calculations of regression function of equation in different amount (value) of the main factors influencing on the heating temperature of fibers and seeds have been done to analyze and receive mathematical models.
The results of digital calculations of production tests were done on computer and sown on drawings (see picture 1-5).
We define attitude toward fiber temperature t, to seeds i with non-dimensional coefficient 9 for full calculations analysis of influence on cotton-seed's initial humidity, productivity of dry drum on humid cotton-seed, temperature dry agent and multiplicity of drying on cotton-seed components heating:
t
0 = -,0m.. = -m-
(1)
where tMd- and tMd- are maximal allowable temperature of fiber and seed appropriately.
As you see, current coefficient of cotton-seed during drying must be less or equally of amount 9max, it is means 9 < 9max. If tMd- = 105 °C, and tMd- =70 °C, it is means 9 = 1,5.
Besides that, it is necessary to do appropriate conditions for equably drying of cotton-seed components in order to warm components equably and coefficient is not exceeded 1,5.
There are amounts of 9, dependence on the initial humidity of cotton-seed, productivity of dry agent and multiplicity of drying in the table № 1.
Table 1. - Importance of stretch coefficient
№ п/п Factors Drying multiplicity
Initial humidity of cotton, W, % Productivity n, t/h Temperature of heat carrying agent T, °C One-time drying Two-times drying Three-times drying
1. 10,5 3,5 100 1,18 1,10 1,08
2. 22,3 3,5 100 1,19 1,11 1,09
3. 10,5 10,0 100 1,16 1,10 1,06
4. 22,3 10,0 100 1,14 1,11 1,05
5. 10,5 3,5 200 1,23 1,14 1,09
6. 22,3 3,5 200 1,20 1,13 1,12
7. 10,5 10,0 200 1,17 1,14 1,07
8. 22,3 10,0 200 1,13 1,12 1,07
Analysis of table facts shows, that the least steadiness come out at one-time drying, where the temperature of dry agent is T=200 °C, and the highest steadiness come out at three-times consecutively drying, at more productivity and in the soft regime drying (where the temperature of dry agent is T=100 °C).
The analysis of picture from 1 to 5 shows that the speed of seeds heating is low than the speed of fibers heating, and they achieve slower limiting heating temperature. With the increasing of tempera-
One-time
ture of dry drum on humid cotton-seed, especially at the most initial humidity of cotton-seed, the difference between the heating temperature of fiber and seeds is increasing. Despite the fact that a little drop of temperature, seeds are dried very slowly. Because of high temperature in the beginning of the process it is inevitably transference of humidity particles from surface into the seeds, and also it is inevitably influence of negative-braking effect on the gradients of temperature.
drying
Picture 1. Dependence of heating temperature of fibers and seeds on temperature agent with the initial humidity of cotton-seed where Wx/c = 10,5%; 1, 2, 3, 4 and 1', 2', 3', 4' — according to fibers and seeds with productivity10; 7; 5 and 3,5 within the limit of an hour
Picture 2. Dependence of heating temperature of fibers and seeds by drying temperature agent with the initial humidity of cotton-seed where Wx/c = 22,3%; 1, 2, 3, 4 and 1', 2', 3', 4' — according to fibers and seeds with productivity10; 7; 5 and 3,5 within the limit of an hour
Two-time drying
IpC
60
59
/
/ f
3> 2, s, s
4 / // /. Sjf / y y *
// A // *
r it / i s • y ✓ * * y y
* * V *
* /
iai ljo 1U ®
Picture 3. Dependence of heating temperature of fibers and seeds on temperature agent with the initial humidity of cotton-seed where Wx/c = 10,5%; 1, 2, 3, 4 and 1', 2', 3', 4' — according to fibers and seeds with productivity10; 7; 5 and 3,5 within the limit of an hour
0 100 lli 150 175 L.V
Picture 4. Dependence of heating temperature of fibers and seeds on temperature agent with the initial humidity of cotton-seed where Wx/c = 22,3%; 1, 2, 3, 4 and 1', 2', 3', 4' — according to fibers and seeds with productivity10; 7; 5 and 3,5 within the limit of an hour
Three-time drying
/
y / / ✓ s J
4 a / s J S/ ✓ s '2
/ // * y K. *
y ' $ s t Xv // 2-> > l-J, y / * * * *
V*' s As f y y *> ✓ ✓ * y
/ r ** * * y
IÎ5
150
Hi
Picture 5. Dependence of heating temperature of fibers and seeds on temperature agent with the initial humidity of cotton-seed where Wx/c = 22,3%; 1, 2 and 1', 2'- according to fibers and seeds with productivity 10; 7; within the limit of an hour; 3, 4 and 3', 4'- according to fibers and seeds with productivity10;7; within the limit of an hour with the initial humidity. W . = 10,5%
Exception or decreasing of putting on the brakes effects of temperature gradient and increasing a coefficient of humidity diffusion from the seeds, possible during drying with relatively the equal temperature in all volume oflayer, close to maximum permissible value, that it is achieved by increasing of seed heating speed in the beginning of drying process of cotton-seed in the regime which ensures a heating without maximum permissible value of temperature.
x/c
Conclusions: Heating process of fiber and seeds in one-time, two-time, and three-time drying of cotton-seed has been considered. It was settled that with the increasing of multiplicity of drying coefficient of unevenness heating components of cotton-seed have been lessen and brought to unit of power.
It is settled by studying of multiple drying, that equably heating of cotton-seed components can be provided by increasing of productivity of dryer and decreasing temperature of dry agent.
2.
References:
Krygina L. F., Khafizov E. K., Salvin K. M. The influence of temperature of drying agent on the heat of cotton-seed influence on its humidity./Cotton industry. T., 1988. - 14. - P. 24-25.
Sevostyanov A. G. Methods and resources of mechanical-technological processes in textile industry. MSTU, OOO Sovyage Beveau, -M., 2007.
