According to the search results, the common faults and solutions of LPG centrifugal spray dryer are as follows:

1、 Wall sticking problem of drying tower

1. Fault phenomenon:

The material clumps or forms water droplets on the tower wall, causing the product to be unable to be discharged normally.

The main reasons include: excessive feed volume, high hot air temperature (exceeding the melting point of the material), improper selection of atomizer, uneven distribution of hot air or insufficient circulating air volume.

2. Solution:

Adjust the feed pump speed to reduce the sample loading volume;

Reduce the temperature of the hot air to below the melting point of the material to avoid melting and adhesion;

Optimize the angle of the hot air distributor to ensure even distribution of hot air;

Add air sweeping devices, air hammers, or rotating scrapers to automatically shake off wall sticking materials;

Clean the air inlet filter and increase the circulating air volume.

2、 Nebulizer malfunction

1. Fault phenomenon:

The atomizer does not produce fog, has a small amount of fog, or frequently breaks the fuse.

The reasons include: chip aging and scaling, damage to circuit components (such as transistors and relays), abnormal base voltage, or changes in oscillation frequency.

2. Solution:

Replace the aging atomizer chip;

Check and repair circuit components (such as transistors and relays) to ensure parameter matching;

Adjust the base bias circuit (such as W1 and W2 potentiometers);

Regularly clean the chip to prevent scaling from affecting atomization efficiency.

3、 Abnormal temperature control

1. Fault phenomenon:

The intake/exhaust temperature is unstable or deviates from the set value (such as high exhaust temperature).

Reasons include: abnormal refrigerant dosage, condenser blockage, sensor malfunction or insufficient heat source output.

2. Solution:

• Supplement or adjust the refrigerant quantity to the standard range;

Clean the condenser and filter to ensure smooth heat dissipation;

Replace the faulty temperature sensor or controller;

Check the heat source system (such as steam pressure, electrical compensation device) to ensure stable heating.

4、 Material receiving system failure

1. Fault phenomenon:

The cyclone separator has low material collection efficiency or material residue.

The reasons include: blockage of the cyclone separator, malfunction of the shut-off fan, and poor sealing of the pipeline.

2. Solution:

Clean the cyclone separator and collection bin to avoid material accumulation;

• Check or replace the shut-off fan to ensure continuous discharge;

Check the airtightness of pipeline connections to prevent dust from escaping due to air leakage.

5、 Electrical and control system malfunction

1. Fault phenomenon:

The compressor does not start, the overload protection frequently operates, or the control fails.

The reasons include: abnormal power supply voltage, damaged capacitors, virtual connections in the circuit, or controller program errors.

2. Solution:

Check the stability of the power supply and the firmness of the wiring;

Replace burnt capacitors or relays;

Reset or replace the faulty controller and recalibrate the parameters.

6、 Abnormal vibration and mechanical failure

1. Fault phenomenon:

Excessive vibration or abnormal bearing noise during equipment operation.

Reasons include: rotor imbalance, bearing wear, or coupling failure.

2. Solution:

Clean or rebalance the rotor;

Replace damaged bearings and adjust clearances;

Tighten the coupling bolts and adjust the alignment.