The three processes are carried out from time to time, and the water (solvent) inside the material is infiltrated, evaporated, and discharged from time to time. The equipment for drying in a short time is mainly composed of cylinder and frame, hollow hollow heating plate, main shaft, cross arm and rakes, disc feeder, hopper tray and finished product outlet, exhaust gas inlet, heat carrier inlet and outlet pipe, Inspection door, worm gear reducer, continuously variable transmission and motor. The main component of the equipment is a hollow heating plate, and the hollow part is welded with a baffle plate to strengthen, which not only increases the rigidity and strength, but also improves the heat transfer effect, and exerts the advantage of high utilization rate of conduction drying heat energy.
Continuous vacuum dryer
The material to be dried is rapidly frozen at a low temperature, and freeze-drying is a technique of drying by the principle of sublimation. Then, in a proper vacuum environment, the frozen water molecules are directly sublimated into a process in which water vapor escapes. The product obtained by freeze-drying is called a lyophilized product. The sublimation process does not cause concentration due to dehydration, and foam is prevented from being generated by water vapor. Side effects such as oxidation. The dry material is porous in the shape of a dry sponge, the volume is basically unchanged, and it is easily soluble in water and restored to its original state. The physicochemical and biological denaturation of dry matter is prevented at the maximum level. The material is always at a low temperature (freezing state) before drying, while the ice crystals are evenly distributed in the material.
Generally, the upper layers are made of low-pressure saturated steam or hot water, hot oil in series, parallel or series-parallel input heating, and each layer of heating plate has heat carrier inlet and outlet pipes. Control the temperature of each layer; the bottom two layers pass cooling water to reduce the product temperature, recover heat and ensure quality. The heating plate is fixed on the frame of the cylinder at a certain interval, and is placed horizontally. Each layer is equipped with a cross arm frame, and the upper and lower layers are staggered and fixed at 45° on the central spindle, and the worm wheel reducer and the continuously variable transmission are arranged. And the motor and other drives, slowly rotate at 0.6 ~ 3.7r / min. Each of the booms is provided with a plurality of detachable hoe-shaped rakes or flat squeegees arranged equidistantly. The raking leaf adopts hinged and reed oscillating structure, so that the bottom edge floats evenly on the disc surface, and the 耙 leaf angle can be arbitrarily adjusted according to the material properties to ensure that the material advances from time to time on the surface of the disc.
Under the mechanical action of the rotary rakes, the dried material is continuously fed from the top disc feeder to the inner ring surface of the uppermost first layer of the heating plate in the apparatus. While rolling and stirring, moving forward from the inside to the outside, it is zigzag covered on the entire surface of the disk, and is heated by contact; then the material falls from the outer edge to the outer surface of the second heating plate outside the second layer, and is installed in reverse. Under the action of the eucalyptus leaves, it moves from the outside to the inside to the inner edge and falls to the inner ring surface of the third heating plate. By analogy, the materials are moved layer by layer from top to bottom, and are continuously heated and dried.
Finally, the dry material falls onto the lower plate, and the evaporated moisture is naturally discharged from the upper inlet by mixing with the exhaust gas in the equipment. Qualified dry waste is obtained by continuously discharging the raking blade to the bottom discharge port. According to product performance, drying requirements and disposal volume, the plate dryer adopts a series of steps such as stepless speed regulation of the spindle, manual adjustment of the height of the disc feeder to adjust the height of the heating plate, control of the temperature distribution of each layer of the heating plate, and final cooling and cooling. The superior performance of the plate dryer.
Low-temperature plasma sterilizer
Plasma Sterilizer,Hydrogen Peroxide Plasma Sterilizer,Plasma Air Sterilizer
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