Rotary disk type air jet impact drying machine

Abstract

The invention belongs to the technical field of agricultural product processing, and particularly relates to a rotary disk type air jet impact drying machine. The rotary disk type air jet impact drying machine comprises an air flow circulation system, a rotary disk system, a weighing system and an automatic control system. In the drying process, hot air flow with certain pressure is jetted into a drying chamber (23) through an adjustable strip-shaped air flow jet (38), multiple layers of round material racks (6) evenly distributed in the drying chamber (23) in the axial direction of a rotary material shaft (8) carry a material disk (7) to rotate in the horizontal plane, the rotary disk system can conduct drying in a rotation speed changing and rotation mode changing mode and the weighing system can indicate the drying condition of materials. The rotary disk type air jet impact drying machine solves the problems that an existing air jet impact drying machine is limited in carrying capacity, hard to meet the drying requirements of batch agricultural materials and high in manufacturing cost, and air flow adjustment is inconvenient; meanwhile, the rotary disk type air jet impact drying machine can realize the batch-type drying process of drying-tempering-drying-tempering, improve the drying efficiency, and lower the running energy consumption of the rotary disk system, and is high in automation degree and good in material adaptability.

Description

technical field [0001] The invention relates to a rotary disc type gas jet impact dryer, which belongs to the technical field of agricultural product processing. Background technique [0002] Gas jet impact drying is a drying method in which heated gas with a certain pressure is ejected through a nozzle of a certain shape and directly impacts the material. It has the advantages of high air velocity, high heat transfer coefficient, and controllable heat transfer rate. Jet impact drying technology has been put into use in drying grapes, drying Chinese herbal medicines and other agricultural materials, and achieved good results. [0003] The horizontal gas jet impingement oven disclosed in Chinese patent ZL02238211.9 sprays hot air with a certain pressure vertically through the circular nozzles arranged at intervals and then impacts the materials on the horizontal tray. The oven can be used for various materials. Drying and baking processing, but its disadvantage is that only ...

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Problems solved by technology

[0003] The horizontal gas jet impingement oven disclosed in Chinese patent ZL02238211.9 sprays hot air with a certain pressure vertically through the circular nozzles arranged at intervals and then impacts the materials on the horizontal tray. The oven can be used for various materials. Drying and baking processing, but its disadvantage is that only one layer of material can be laid flat on the material tray, the loading capacity is small, and the position between the nozzle and the material is relatively fixed, and the materials at different positions on the tray are not evenly dried

[0006] Chinese patent ZL110003774.6 discloses a pulsating gas jet impingement dryer, the material rack adopts a parallel four-bar mechanism, high-temperature gas is sprayed vertically downward through the nozzle on the top of the drying chamber, and the material tray group is under the action of the parallel four-bar mechanism Make a translation and rotation movement around the axis of the material rack on the vertical plane, and the bottom plane of the material tray is always perpendicular to the direction of the jet air flow. The impact of the air flow on the material at the bottom is the smallest, and then gradually decreases, realizing the pulsating drying of the material, but its shortcomings are: the structure of the rotating rack for pulsating drying is complicated, and the manufacturing process is inconvenient; the air jet assembly consists of nozzles, nozzles and nuts, etc. The nozzles are arranged at intervals on the jet plate. The manufacturing of the jet components is complex and requires a large number, and the manufacturing cost is high. When the airflow needs to be adjusted through the nozzles, the nozzles need to be replaced one by one, which is inconvenient to adjust; The way of rotating in the vertical plane restricts the size and quantity of drying trays, and the loading capacity of the machine is obviously limited, which makes it difficult to meet the drying needs of batches of large-scale agricultural materials, which is not conducive to the promotion of pulsating gas jet impact drying technology At the same time, the continuous rotation mode significantly increases the energy consumption of the turntable during the drying process; when the equipment is operated, it is necessary to manually set the fan control part, rotation control part and temperature and humidity control part, which is cumbersome and difficult to implement. The automatic multi-stage variable process drying limits the applicability of the dryer and the improvement of the drying effect; at the same time, the equipment does not have the functions of automatic weighing and online detection of moisture content during the drying process. insufficient

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