The disc continuous dryer is a kind of high-efficiency conductive continuous drying equipment, and the disc dryer is also called multi-layer disc dryer. Rotary rake stirring, vertical continuous drying device, is a conduction drying type contact dryer. The main structure is composed of shell, stirring rake, large and small drying plates, transmission device, manhole and so on.

   The leached meal contains about 25%-30% solvent. In order to recover the solvent, the solvent characteristics can be used, and the solvent in the meal can be evaporated and condensed to be reused after indirect steam heating. In the process of heating and desolventizing, the urease activity in the meal is inactivated, and the protein is denatured and undergoes Maillard reaction during the heating process, so that the meal has a special fragrance. Make the moisture and temperature in the meal meet the product quality and storage requirements. Its unique structure and working principle determine that it has the characteristics of high thermal equivalent efficiency, low energy consumption, small footprint, simple configuration, convenient operation and control, and good operating environment. It is widely used in chemical, pharmaceutical, pesticide, food, Drying operations in industries such as feed and agricultural by-product processing.

   The wet material is continuously fed from the feeder to the first layer of the drying plate on the upper part of the dryer, and the rake arm with rake leaves makes a rotary motion to make the rake arm make a rotary motion to make the rake leaves continuously turn over the material. The material flows through the surface of the drying plate along the exponential spiral line. The material on the small drying plate is moved to the outer edge and falls to the outer edge of the large drying plate below. The material on the large drying plate moves inward and falls from the middle. The feed port falls into the next layer of small drying trays. Both large and small drying plates are arranged alternately so as materials can go through the whole dryer continuously. The heating medium is passed into the hollow drying plate. The heating medium is in the form of saturated steam, hot water, heat transfer oil, etc. The heating medium enters from one end of the drying plate and is exported from the other end. The dried materials will drop from the last layer of the drying plate to the bottom layer of the shell body, and will be moved by rakes to the dischargeport. Solvent vapor and moisture overflow from the material and are discharged from the steam outlet on the top cover. The dry material discharged from the bottom layer can be directly packaged, or transported to the meal storage through the conveying equipment, measured and packaged. By adding auxiliary equipment such as heater, solvent recovery condenser, bag filter, dry material back-mixing mechanism, induced draft fan, etc., the drying production capacity can be improved, and the solvent can be recovered conveniently when drying pasty and heat-sensitive materials, and Capable of pyrolysis and reaction operations.

Product performance characteristics

 ⑴ High thermal efficiency. The disc continuous dryer is dried by conduction and heat transfer. During the drying process, only a small amount (or no) of air is introduced into the dryer, and the amount of tail gas carried is very small, so its thermal efficiency can reach more than 65%.

  ⑵ Low power consumption and low noise. Because the material layer is very thin during the drying process, the spindle speed is low, the power required by the material conveying system is small, and the power consumption is very small. The power consumption of the whole drying device is only 1/5-1/7 of the power consumption of the convection heat transfer device. , and the noise is very small.    

  ⑶ Less material damage. During the drying process, the material is slowly pushed or pushed by the rake blades in the drying plate, and the material particles wear little to each other, so the particle shape of the material does not change before and after drying, and the damage rate is extremely low, especially without affecting the crystal. The surface quality of the material.  

  ⑷ The material is heated evenly. During the drying process, the material rolls along the Archimedes spiral trajectory in the drying plate, and the distance traveled by the material is 5 times the radius of the drying plate, and it falls layer by layer. Therefore, the contact time of the material with the heating plate is basically the same, and the heating is very uniform. .     

  ⑸ Small material loss and good environmental protection. During the drying process, the material goes in and out from the top, and the distribution of the material is wet at the top and dry at the bottom, and the gas flow rate of the drying exhaust is extremely low (about 0.1 m/s), so it is difficult for the material dust to float to the top of the equipment, and it will not be carried by the exhaust gas. Walking, not only does not lose materials, but also does not pollute the environment.

  ⑹ Easy to recover solvent. The main component of the tail gas discharged from the dryer during the drying process is methanol, and the flammable, explosive and toxic methanol can be recovered conveniently through the condensation recovery device.

  ⑺ Simple structure, small footprint, easy to operate. Due to the small amount of tail gas discharged from the dryer during the drying process and almost no material dust, there is no need to configure dust removal equipment that occupies a large area and is complicated to operate.