the drying process of rice dumpling leaves
was studied
The drying of brown leaves also belongs to intensive drying. The upper and lower circulation system with top outlet air can not achieve uniform drying of brown leaves in the drying room. Therefore, the side 360 circulation system with side air outlet is more suitable. The side circulation drying system has certain requirements for the placement of rice dumpling leaves. The hot air needs to pass through the gap between the brown leaves and return to the tail air outlet, so the brown leaves should be placed To leave a gap in the wind path, about 5-10cm is more appropriate.
according to the calculation that one 12p host is equipped heat recovery exchanger， manufacture heat exchanger with a 6 m long, 4 m wide and 2.2 m high drying room, 2000 Jin of fresh brown leaves can be put in at a time, and the total time is 24 hours, which is divided into three stages. The first stage is 3 hours, the temperature is 60 ℃, and the mode is dried. In the second stage, the temperature is 65 ℃, the relative humidity in the drying room is 35%, and the mode of drying + dehumidification is adopted. In the third stage, 68 ℃, the relative humidity in the drying room was 18%, and the drying time was 11 hours. The moisture content of brown leaves after drying was less than 13%. After drying, the brown leaves will be dark green, grayish black or yellowish gray, not cyan. The moisture content of palm leaves after drying is lower than 13%, and it can be cooled naturally.
the most difficult part to dry is the stem part of the bundle. hepa air filter manufacturer If this part is not so thick, the drying time will be shortened. Do not block the exhaust air of axial flow fan when drying brown leaves, otherwise air dehumidifier machine the heat generated by the main engine can not blow out normally, which is easy to cause high pressure protection of compressor.
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