一、工作原理及应用范围介绍 Introduction of Working Principle and Scope of Application
4. 饲料、 肥料
Wet materials self-charger continuously charges materials to the first layer of drying tray on the top of the drier, and the rabble arm with shovel blade conducts a rotary motion to make the rabble arm shovel the materials continuously. The materials flow through the surface of drying tray along the specified spiral line to conduct heat and mass transfer, and the materials on the small drying tray are transferred to its outer edge and fall on the outer edge of the large drying tray, the materials on the large drying tray move inward and fall on the inner edge of next layer of small drying tray from the middle blanking mouth. Large and small drying trays are arranged up and down alternay, so that the materials can continuously flow through the whole drier. The hollow drying tray is added with heating media such as steam, hot water, conduction oil and high-temperature molten salt. The heating medium enters from one end of drying tray and derived from the other end. The materials which have been dried fall on the bottom layer of shell from the last layer of drying tray, and finally moved to the outlet by shovel blade for discharging. The moisture overflows from the materials and discharged from the moisture discharge outlet on the head cover (the moisture of vacuum type tray drier is discharged from the vacuum pump outlet on the head cover).
Tray drier is a continuous vertical and heat conduction-oriented drying unit, which is widely used in the fields such as chemical industry, dye, pesticide, plastics, medicine and food. Drying technology has its wide development prospects. It can be used for drying the following products:
1. Organic chemical industry
2.Inorganic chemical industry
3.Medicine and food
4. Feed and fertilizer
1.Continuous operation and high thermal efficiency. Continuous tray drying machine conducts drying by the means of conduction heat transfer. In the process of drying, the drier is injected with a small amount of air (or with no air), it has very little end gas carrying volume, thus its thermal efficiency can reach over 65%.
2.Low power consumption and small noise. Due to very thin bed of materials, low spindle speed, less power required for materials transfer system and less power consumption in the process of drying, the power consumption of the full set of drying unit is 1/5~1/7 of that of convective heat transfer unit and it has very small noise.
3.Materials evenly heated and short drying time. In the processing of drying, the materials roll forward in the drying tray along the Archimedes spiral motion curve and the journey passed by the materials is 5 times of radius of the drying tray, and then the materials fall layer by layer, therefore, the time that the materials contact with the heating plate surface is basically identical and the materials are heated very evenly.
4.Small material loss and good environmental protection.
5.Closed continuous operation of equipment and low labor intensity of worker.
三、工艺流程图Process flow diagram
Technical parameters (the values in the table below are for reference in type selection only)