Onion is a multifunctional health food, which has many functions such as lowering blood pressure, refreshing, increasing metabolism, anti-aging, and preventing osteoporosis. The dried onions can be made into onion powder, which is widely used in nutrition and health products, functional foods, seasonings, convenience foods, etc. Traditional drying methods such as drying in the sun tend to cause excessive heat and necrosis of the onion skin, and the temperature is not controlled, and it is prone to mosquitoes and rain. Our drying oven can dry onions efficiently and quickly while ensuring quality.
Why choose our onion drying machine？
Hot air circulation drying oven has reached the advanced level at home and abroad by a lot of upgrading, SL-C series special drying oven adopts the axial flow fan, with the automatic constant temperature control system. Its thermal efficiency is more than 95%, adopts a convective heat transfer method to heating the air. Fresh air from the air inlet supplement, waste damp is out from the dehumidification system. Constantly added fresh air and discharged damp to keep the correct relative humidity in the oven. The biggest characteristic of this series of drying ovens is part of the hot air cycling in the cabinet, the entire cycle is closed, so as to enhance the heat transfer, saving energy.
The process of the onion drying
The drying process should be based on different varieties to determine different drying temperatures and drying time, the color and moisture content of the finished product. Next, I will introduce the process of drying onions.
- Temperature: Vegetables generally have a high moisture content, so it is necessary to set a low constant temperature for drying. The high temperature will destroy the nutritional value of vegetables. For ordinary onions, the temperature should generally not exceed 50°C, and the water output rate during drying should reach more than 20%. When drying, the method of stepped cooling and drying is adopted. The initial temperature is set to 40-50°C, and it is in the rapid drying stage at this time. Then lower the temperature to 30-40°C and dry slowly. Finally, the temperature is lowered to about 25°C. At this time, the moisture content has basically met the requirements. If the temperature is too high, the color of the onion will be damaged.
- Drying time: The drying cycle for a batch of onions is about 15 hours, and rapid drying will destroy the quality of the product.
- Humidity: The moisture of onions contains a certain amount of sugar, which makes dehydration difficult. Controlling the speed of dehydration is critical.
Kelebihan yang onion drying machine
- Bahagian dalam dan luar ketuhar diperbuat daripada keluli tahan karat atau keluli warna, yang mempunyai kelebihan rintangan kelembapan, rintangan kakisan, kekuatan tinggi, dan tiada karat.
- Ketuhar menggunakan dua pintu untuk memudahkan pemeriksaan, pembongkaran bahagian, pembukaan mudah, dan pembersihan mudah.
- Peralatan menggunakan tenaga haba untuk meminimumkan kehilangan tenaga haba dari pembakaran, dan secara saintifik menggunakan semula tenaga haba.
- Keseluruhan peralatan mempunyai tapak yang kecil, mudah alih, dan tiada kos pemasangan.
- Jumlah aliran udara, suhu pemanasan, masa kediaman bahan, dan kelajuan pengisian boleh disesuaikan untuk mendapatkan kesan pengeringan terbaik.
- Bukan sahaja bahan boleh dikeringkan, tetapi kadang-kadang bahan tersebut boleh dibakar atau diperap.
- Peranti pengedaran udara unik menjadikan pengedaran udara panas lebih sekata dan memastikan konsistensi kualiti produk.
- Reka bentuk yang sederhana, pemasangan yang mudah, dan ia boleh berjalan lama.
The applications of the onion drying machine
It is suitable for the drying of various materials such as meat products, vegetables, fruits, food, medicinal materials, crops, etc. It makes full use of the different harvesting seasons of unused crops, and uses equipment in time to improve the utilization rate of equipment and funds.
