Reasons for blockage of nebulizer in spray dryer and Solutions

The blockage of the atomizer is mainly some mechanical impurities in the system. For the problem of preventing the atomizer from clogging, bold drying is recommended. According to many years of experience, several methods can be generally adopted.

Reasons for blockage of nebulizer in spray dryer and Solutions

The blockage of the atomizer is mainly some mechanical impurities in the system. The viscosity of crystal or feed liquid in the process of conveying large particles in the material exceeds the conveying limit. If the atomizer is completely blocked, it can be judged from two phenomena: first, the pressure of the high-pressure pump rises suddenly; second, the tower outlet temperature increases significantly. If the atomizer is partially blocked or can not be completely atomized, the pressure change of the high-pressure pump is not obvious, but the outlet gas temperature of the dryer will be significantly increased. No matter what kind of situation occurs, it must be treated in time, otherwise, a large amount of waste will be generated, and even other faults will be caused. In order to prevent the atomizer from clogging, Haomai drying summarized the following methods according to many years of production experience

Choose the right filter

The filter is the equipment for filtering impurities in the filter material liquid. The selection of the filter screen mesh should be suitable for the inlet channel and aperture of the atomizer. Generally, the mesh diameter of the filter is 0.2 times of the inlet channel or aperture of the atomizer.

Set up monitor

The camera is set at the position where the atomization state can be observed, and then the atomization state is transmitted to the monitor in the control room in time, so that the operator can grasp the atomization state in time and find out the fault in time

Use air pressure or compound atomizer

This atomizer has the dual functions of airflow atomizer and pressure atomizer. When the pressure of high-pressure pump has not reached the atomization pressure, compressed air is used for atomization, and the compressed air is stopped when the high-pressure pump works normally. In the same way, if the atomizer has abnormal atomization for some reason, this method is also adopted to prevent the occurrence of wet materials. This method is an additional means to deal with the failure

Quick opening structure with atomizer

The location of the atomizer adopts the method of card making. It is very convenient to install and disassemble the atomizer components in an instant without any tools. It is not only convenient to operate, but also saves a lot of time for troubleshooting.