Bench spray dryerDuring the operation, various problems may be encountered. Here are some common issues and their solutions:

　　1、 Serious wall sticking phenomenon

Phenomenon description: There are sticky wet powders everywhere in the drying room.

resolvent:

1. Reduce the feeding amount appropriately to ensure that the material can evaporate fully.

2. Properly increase the inlet and outlet temperatures of the hot air to enhance the drying effect.

3. At the beginning of spray, the flow should be small, gradually increased, and adjusted to the appropriate time.

4. Check if the pipeline is blocked, adjust the solid content of the material, and ensure the fluidity of the liquid material.

　　2、 The moisture content of the product is too high

Phenomenon description: The moisture content of the finished product exceeds the expected standard.

resolvent:

1. Reduce the feeding amount appropriately to increase the exhaust temperature, thereby reducing the moisture content of the finished product.

2. Check and adjust the temperature and air intake of the hot air system to ensure even temperature distribution in the drying room.

　　3、 Low product purity and excessive impurities

Phenomenon description: The finished product contains too many impurities, which affects the purity of the product.

resolvent:

1. Check whether the filter material in the air filter is evenly laid and whether the filter has been used for too long. If so, replace it immediately.

2. Check the coke powder situation at the hot air inlet to overcome eddy currents.

Before spraying, the material should be filtered to ensure its purity.

4. Clean the equipment again to remove any impurities that may be present inside.

　　4、 The product particles are too fine

Phenomenon description: The particles of the finished product are too fine, which affects the solubility and blending performance of the product.

resolvent:

1. Increase the solid content of the feed solution to increase the particle size.

2. Increase the feed rate to improve the efficiency of spray drying.

3. Reduce the centrifugal speed to slow down the refinement process of particles.

4. Increase the inlet air temperature to enhance the drying effect and promote particle formation.

　　5、 Excessive loss of followers

Phenomenon description: Excessive loss of finished products during the collection process has affected the yield of finished products.

resolvent:

1. Check whether the cyclone separator has been deformed due to impact or collision, and repair it in a timely manner if there is any deformation.

2. Improve the airtightness of the inlet and outlet of the cyclone separator to prevent powder leakage.

3. Check whether there is any material accumulation or blockage on the inner wall and discharge port of the cyclone separator. If there is any blockage, it should be cleaned in a timely manner.

4. Add a second level of dust removal as needed to improve the efficiency of powder collection.

　　6、 The evaporation rate is too low

Phenomenon description: The evaporation capacity of the spray dryer is lower than the expected standard.

resolvent:

1. Check whether the rotation speed of the centrifuge of the spray dryer is normal, and adjust it in time if there is any abnormality.

2. Check whether the position of the centrifuge regulating valve is correct and ensure that the regulating valve is in the correct working state.

3. Check whether the air filter and air heater pipes are blocked, and clean them in a timely manner if there is any blockage.

4. Check if the voltage of the power grid is normal to ensure that the equipment can work properly.

5. Check whether the connections of each component of the equipment are sealed, and if there is any air leakage, it should be repaired in a timely manner.

7、 Abnormal vibration or noise of the equipment

Phenomenon description: abnormal vibration or noise occurs during the operation of spray dryer.

resolvent:

1. Check whether the installation foundation and fasteners of the equipment are firm, and tighten them in a timely manner if they are loose.

2. Check whether the rotating components inside the equipment are balanced, and adjust the balance if there is any imbalance.

3. Check and maintain the lubrication system of the equipment to ensure good lubrication.

The desktop spray dryer may encounter many problems during operation, but as long as the correct solutions are mastered, these problems can be effectively solved to ensure the normal operation of the equipment and product quality.