Advantages and disadvantages of disc dryer
Advantages and disadvantages of disc dryer
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1. The energy consumption of the disc dryer is relatively low, but the investment in equipment is relatively higher.
2. The output of the disc dryer is limited by its flow rate. Generally, it cannot be made very large. Generally, the drying tray with a diameter of 3 meters is already very large, which is basically the limit.
3. The rakes of the disc dryer generally have experience of damage, and the inspection door should be opened for inspection at regular intervals.
4. Maintenance is basically replaced by common, mast, and rakes need to be replaced.
5. For viscous materials, materials that are stuck to the material are generally not suitable for use with disc dryers.
But overall, the disc dryer is relatively energy efficient, and the advantages are quite obvious.
The advantages of the disc dryer are obvious:
1. Continuous operation, high thermal efficiency. The disc dryer is dried by conduction heat transfer. During the drying process, only a small amount (or no air) is introduced into the dryer, and the exhaust gas carrying amount is small, so the thermal efficiency can reach more than 65%.
2. Low power consumption and low noise. Due to the thin layer in the drying process, the spindle speed is low, the power required for the material conveying system is small, and the power consumption is small. The power consumption of the complete drying device is only 1/5~1/7 of the power consumption of the convection heat transfer device. And the noise is very small.
3. The material is evenly heated and the drying time is short. Since the material rolls in the drying tray along the Archimedes spiral movement path during the drying process, the material travels 5 times the radius of the drying disc and falls down layer by layer, so the material contacts the heating surface is basically the same time, and the heat is evenly distributed. .
4. Material loss is small and the working environment is good.
5. Large drying capacity.
6. The equipment is closed and continuous operation, and the labor intensity of the workers is low.
7. The drying medium can utilize the steam generated by the waste heat boiler, thus saving a lot of coal.
8. Product quality is stable.
9. The disc dryer can design the vacuum disc continuous dryer to continuously add the wet material to the main machine hopper. After opening the upper electric vacuum ball valve to distribute the materials into the top two tanks, the upper and lower vacuum ball valves are turned on and off. Continuously added to the upper part of the dryer by the stirring motor, the 耙 arm with the 耙 leaf rotates to make the 耙 leaf continuously pluck the material, so that the material fully absorbs heat, and the material flows along the exponential spiral Drying the surface of the disc, the material on the small drying tray is transferred to the outer edge, and the outer edge falls to the outer edge of the large drying tray below, the material on the large drying tray moves inward and falls into the lower layer from the intermediate feeding opening In the small drying tray, the size of the drying tray is alternately arranged up and down, the material is continuously flowed through the entire dryer, and the heating medium is introduced into the hollow drying tray. The heating medium enters the drying pan from one end of the drying pan and is led out from the other end. The dried material falls from the drying tray of the rear layer of Zui to the cooled bottom layer of the shell, and is transferred to the discharge port by the raking leaves to discharge the bottom two tanks, and is discharged by the upper and lower electric vacuum ball valve rotation switch. The moisture fraction evaporates from the material and evaporates, and is forced out by the vacuum pump in the upper and lower tanks. The solvent is condensed by the condenser into the buffer tank for recovery, and the wet portion is emptied.