Cause Analysis
1. Material humidity is too high: If the humidity of the processed material is too high, it will be difficult to quickly dehydrate and evaporate during the rotation of the paddle, thus affecting the discharge speed.
2. The paddle speed is too low: The rotation speed of the paddle directly affects the drying effect. If the speed is too low, it will slow down the drying speed of the material and cause slow discharge.
3. The feed speed is too fast: If the feed speed is too fast, the material may stay in the drying chamber for too short a time, and the water cannot be fully evaporated, affecting the discharge speed.
4. Too much dust accumulation in the equipment: After long-term operation, a certain amount of dust, dirt or material residue may accumulate inside the paddle dryer, hindering the smooth flow of the discharge port.
5. Paddle wear: As a key component of the dryer, the paddle surface may be uneven due to long-term friction and wear, affecting the smooth flow of the material.
6. Low steam pressure or high water content: Insufficient steam pressure or high steam water content will affect the drying efficiency, resulting in insufficient material drying and slow discharge speed.
7. Heating surface sticks to the wall or scales: If the heating surface adheres to the material or scales, it will affect the heat conduction efficiency and slow down the material drying speed.
8. Condensate refluxes to the dryer: Condensate reflux will lower the temperature in the dryer and affect the drying effect.
9. Leakage of air and water from the paddle or jacket: This will cause heat loss and reduce the drying efficiency.
Solution suggestions
1. Adjust the material humidity: Before using the paddle dryer, make sure that the humidity of the material being treated is within the appropriate range. The humidity of the material can be adjusted by pre-treating the material before feeding, such as pre-drying, pre-dehydration, etc.
2. Adjust the paddle speed: According to the nature and requirements of the material, adjust the paddle speed appropriately. Generally, increasing the paddle speed can accelerate the drying process of the material and increase the discharge speed.
3. Control the feed speed: Reasonably control the feed speed to ensure that the material has enough residence time in the drying chamber to fully evaporate the water. Avoid feeding too fast, which will cause the material to not be fully dried.
4. Clean the equipment regularly: Clean and maintain the paddle dryer regularly, remove dust, dirt and material residue inside, and keep the equipment unobstructed. You can use vacuum cleaners, cleaning brushes and other tools for cleaning.
5. Check and replace the paddles: Check the wear of the paddles regularly. If the wear is serious, replace the paddles in time. Keeping the surface of the paddles flat will help smooth the flow of materials.
6. Adjust the steam pressure: Ensure that the steam pressure meets the equipment requirements, discharge the condensed water, and avoid excessive water content in the steam.
7. Clean the heating surface: Clean the heating surface regularly to prevent material adhesion and scaling, and improve heat transfer efficiency.
8. Check the condensate discharge system: Ensure that the condensed water can be discharged smoothly to avoid backflow to the dryer.
9. Repair or replace seals: Check the sealing of the paddles and jackets, repair or replace damaged seals to prevent air and water leakage.
