Multi-field collaborative dryer for crop seeds

Abstract

The invention discloses a crop seed multi-field cooperation dryer which comprises a hot-blast stove, a heat exchanger, a hot air pipeline, a flue gas pipeline, a proportional valve, a far infrared generation device, a tempering section, a depressurization flash drying section, a counter mixed-flow air-induced drying section, a grain discharge section, an air-in angle box, an exhaust angle box, an exhaust pipeline, a drainage pipe, an induced draft fan, a dust chamber, an elevator, a grain discharge device, an under belt conveyor and a moisture and drying temperature online detector. In the invention, the flue gas waste heat of the drying system is recycled, far infrared thermal radiation is generated, the seed tissue functions are improved, and the heat transfer is intensified; by adopting the depressurization flash quick drying and counter mixed-flow air-induced drying multi-field cooperation, the drying speed and drying uniformity are improved, the seeds flow under gravity, mechanical damage and residual seeds are avoided, and the universality of the dryer is remarkably increased; and moreover, the structure is simple and suitable for drying various crop seeds and particle materials, and the problems such as low drying efficiency, slow water removal, non-uniform drying and high energy consumption in the prior art are effectively solved.

Description

technical field [0001] The invention relates to the technical field of crop seed drying, in particular to a crop seed multi-field cooperative dryer and a drying method thereof. Background technique [0002] Crop seeds include grain crop seeds, oil crop seeds, vegetable seeds, etc. The drying process and method have a great impact on their vigor, germination rate, processability and storage resistance. In order to strengthen the drying process, increase the drying rate and save energy consumption, various process methods and systems such as static layer drying, fluidized layer (cross-flow, downstream, counter-current, mixed-flow) drying, continuous drying, circular drying-slow recovery, etc. Heat consumption, etc., designed a variety of dryers with different structures. Based on the design concept of heat supply and water removal, the common practice is to artificially heat the air and send it into the drying layer. The dry air provides the seeds with the heat required for w...

AI Technical Summary

Problems solved by technology

Based on the design concept of heat supply and water removal, the common practice is to artificially heat the air and send it into the drying layer. The dry air provides the seeds with the heat required for water vaporization and absorbs water, and then takes it outside the machine. The common defect is: when designing the dryer, the attention of energy saving, consumption reduction and quality improvement is focused on the subjective heat consumption, but the objective factors of different forms of the drying system are ignored. The effective use of water and the role of multi-field synergistic water removal

This method is not only difficult to make substantial progress in the efficiency and energy saving of the dryer, but also can only rely on raising the temperature of the hot air to strengthen the drying process and increase the drying rate. During ventilation, the seeds experience a process of continuous heating. It often happens that the temperature of the seeds exceeds the limit value, which affects their drying quality. Moreover, this method has poor water removal uniformity, high energy consumption, and poor versatility of the dryer.

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