The Main Component of the Organic Fertilizer Drying Machine – The Lifting Plate
When it comes to organic fertilizer dryers, it is necessary to talk about the main components of the dryer – the lifting plate. The traditional sludge dryer has a simple lifting plate structure and a single geometric shape. Under the condition of constant speed, only the material can be fixed in the section I, which causes the hot air to be “opened” in the I zone; in the II and III areas, a large “cavity” is formed, which makes the hot air “short-circuit”. Therefore, the traditional sludge dryer has a low thermal efficiency.
In order to improve the working performance of the lifting plate, the technicians of the organic fertilizer dryer have developed a combination lifting plate arranged in a multi-geometric angle and a spiral cross misalignment manner. The lifting plate enables the material to be rapidly advanced from the heating and heating stage to the constant-speed drying stage, and at this stage, the material is formed into a thin and uniform “material curtain”, which increases the contact area between the material and the hot air flow. Since this layer of “material curtain” is formed by a chamfered surface and is propelled in a spiral shape, it does not affect the flow velocity of the hot gas flow, and can enhance the heat transfer and mass transfer of the material, thereby greatly improving the drying efficiency of the dryer and the energy saving effect.
It is known in the industry that organic fertilizer dryers are theoretically divided into three stages: heating, constant-speed drying, and slowing drying. The main functions of the sludge dryer suction plate are: guiding material, current sharing, lifting material, and material blocking, and orderly controlling the movement and drying process of the material in the cylinder. Therefore, the structural form of the lifting plate should be combined with the physical and chemical properties of different materials and the characteristics of the materials in each stage of the drying process.