According to the process characteristics of bread crumbs, a vibrating fluidized bed dryer is selected. A vibrating fluidized bed is formed by applying vibration to an ordinary fluidized bed. The fluidization of the ordinary fluidized bed is realized entirely by the energy of air, while the fluidization and transportation of materials in the vibrating fluidized bed are mainly realized by means of vibration, and the hot air is mainly used for heat transfer and transportation. Mass transfer and take away heat, which significantly reduces the amount of hot air and saves energy. In addition, material crushing is reduced, and dust entrainment is less.
This drying system mainly includes blower, air heater, vibrating fluidized bed, cyclone collector, bag filter, induced draft fan, exhaust pipe and other equipment.
Features:
(1) The heat transfer effect is good. Due to the large contact area of the drying medium of the material and the continuous intense fluidization of the material in the bed, the heat transfer effect is good, and the heat capacity coefficient is large, which can reach 8400~25000KJ/m3h℃.
(2) The temperature distribution is uniform, because the temperature distribution in the fluidized bed is uniform, any local overheating of the product is avoided, and it is especially suitable for drying some heat-sensitive materials.
(3) Flexible operation, continuous operation of drying and cooling can be carried out in the same equipment.
(4) The bed board is punched by laser, the shape is a strip hole, and the hole width is only a dozen wires to reduce material leakage.
(5) The residence time can be adjusted, and the residence time of the material in the dryer can be adjusted as needed, so it is more suitable for the situation where the water content of the product fluctuates.
(6) Less investment, the drying device itself does not include mechanical moving parts, the investment cost of the device is low, and the maintenance workload is small.
(7) The fluidization and transportation of materials are mainly realized by means of vibration, so the air consumption and energy consumption are obviously reduced.
(8) The fluidization is well-proportioned, without voids and blow-through, and uniform drying and cooling products can be obtained.
(9) The adjustability is good, adapting to the face width. Layer thickness and movement speed in the machine, as well as full amplitude changes can be adjusted.
(10) The damage to the surface of the material is small, and it can be used for drying fragile materials; it does not affect the working effect when the material particles are irregular.
(11) The fully enclosed structure is used to effectively prevent cross infection between materials and air, and the working environment is clean.
(12) High mechanical efficiency and thermal efficiency, good energy saving effect, which can save energy by 30-60% compared with ordinary drying devices.
(13) Smooth transitions are adopted at all the corners of the contact part between the main body of the equipment and the material, and the welding is fully welded. The inner and outer surfaces are polished, with no dead ends and easy to clean.
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