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تأثیر خشککن دوار بر خشــک کردن شلتوک رقم هاشمی و کیفیت فراوری برنج | ||
| تحقیقات سامانهها و مکانیزاسیون کشاورزی | ||
| مقاله 3، دوره 21، شماره 74، شهریور 1399، صفحه 17-32 اصل مقاله (1.47 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/erams.2018.120173.1235 | ||
| نویسندگان | ||
| حمیدرضا گازر* 1؛ محمدرضا علیزاده2 | ||
| 1دانشیار مؤسسه تحقیقات فنی و مهندسی کشاورزی، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران | ||
| 2دانشیارمؤسسه تحقیقات برنج کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، رشت، ایران | ||
| چکیده | ||
| دو مشکل مهم در خشــک کردن برنج، یکی مصرف بالای انرژی و دیگری غیر یکنواختی خشک شدن شلتوک در خشککنهای خوابیدۀ رایج است که شانس شکستگی دانه را در مراحل فراوری برنج افزایش میدهد. در این مقاله، عملکرد یک دستگاه خشککن دوار جدید ساخته شده در کارخانۀ شالیکوبی برادران زارع با خشککن رایج برنج (خشککن خوابیده) برای خشــک کردن شلتوک رقم هاشمی ارزیابی شده است. علاوه بر شاخصهای مدتزمان خشــک کردن، روند تغییرات رطوبت شلتوک و میزان انرژی مصرف شده در فرایند خشــک کردن، تأثیر کاربرد هر یک از خشککنها بر شاخصهای کیفی راندمان تبدیل، درصد پوستکنی شلتوک، راندمان تبدیل برنج کامل و درصد شکستگی دانه ها نیز بررسی شده است. نتایج به دست آمده از تحقیق نشان میدهد بهدلیل گرمای محیط قرارگیری خشککن خوابیده، کاربرد این خشککن موجب کاهش مدتزمان خشــک کردن در حدود 9 درصد و صرفه جویی در مصرف انرژی تا 8/9 درصد شده است.انرژی ویژه مصرفی برای تبخیر رطوبت شلتوک در خشککن خوابیده نیز 13/5 مگا ژول بر کیلوگرم آب تبخیرشده به دست آمده که حدود 11 درصد نسبت به خشککن دوار کمتر است. با استفاده از خشککن دوار، راندمان تبدیل برنج 3/8 درصد بیشتر شده است. کاربرد خشککن دوار تأثیر قابل توجهی بر پوستکنی شلتوک خشکشده نداشته است. استفاده از خشککن دوار برای خشــک کردن شلتوک، راندمان تبدیل برنج کامل (سالم) را حدود 7/5 درصد افزایش و مقدار خرده برنج را نیز تا حدود 7/8 درصد کاهش داده است. | ||
| کلیدواژهها | ||
| انرژی؛ پوست کنی؛ تبدیل برنج؛ خشککن؛ شکستگی | ||
| عنوان مقاله [English] | ||
| Influence of Rotary Dryer on Paddy (Hashemi Var.) Drying and Rice Milling Quality | ||
| نویسندگان [English] | ||
| Hamid Reza Gazor1؛ Mohammad Reza Alizadeh2 | ||
| 1Associate Professor, Agricultural Engineering Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran | ||
| 2Associate Professor, Rice Research Institute of Iran, Agricultural Research, Education and Extension Organization (AREEO), Rasht, Iran | ||
| چکیده [English] | ||
| Long time processing, high energy consumption and non-uniformity in layers moisture are common problems in paddy drying using conventional batch type dryer, leading to increase the chance of kernel breaking during milling process. In this research, drying time, grains moisture content change and energy consumption of a newly rotary dryer were compared with that of a conventional batch type dryer for paddy (Hashemi variety) drying. Besides, quality parameters as hulling milling ratio, head rice yield and white rice breaking percent were studied in paddy dried using both dryers. All Experiments were done triplicate and data analyzed using T- student method in 5% probability. Results showed that newly rotary dryer caused uniformity in drying processes and cleaning of dried paddy; but, in conventional batch type dryer, because of environmental warm air around it, drying time and energy consumption were about 9 and 8.9 percent, respectively, less than what were calculated in newly rotary dryer. Specific energy consumption for paddy moisture evaporation was 13.5 MJ/kgH2O and it was about 11 percent less than that in rotary dryer. The difference of paddy moisture contents and temperatures in top and lower part of layers of batch type dryer were 2 percent and 6 °C respectively. Milling ratio increased 3.8 percent when rotary dryer was used. Rotary dryer did not have significant effect on paddy hulling. The main effect of using rotary dryer occurred on head rice yield and it was increased about 7.5 percent, comparing with batch dryer. Using rotary dryer caused 7.8 percent decrease in broken kernels, comparing with conventional batch type dryer. | ||
| کلیدواژهها [English] | ||
| Breakage, Dryer, Energy, Hulling, Paddy | ||
| مراجع | ||
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