As the most critical equipment in the process of oil and grease processing, centrifuges in the operation of a variety of alarms, now the centrifuge common types of alarms and solutions are summarized below:

1、Centrifuge stall alarm

Some brands of centrifuges will appear in the normal operation of the stall alarm, the main reason is that the feed flow of the centrifuge is too large, the centrifuge in the slagging when the rotational speed drops too much, in the specified time can not be restored to the rated speed, then the monitoring program will think that the centrifuge stalled. For safety reasons, the centrifuge will be forced to stop after the stall alarm.

Solution: reduce the feed flow, so that the normal operating current within a reasonable range, while observing the centrifuge slagging speed and current changes.

2、The centrifuge slagging amount is too large alarm or slagging strength is too high alarm

Centrifuge in the process of slagging will appear larger vibration, while the speed drop, in order to control the speed in the rated range, the motor load increases, the current rises. If the centrifuge often appears slag discharge amount is too large alarm or slag discharge strength is too high alarm, it has irreversible damage to the centrifuge, and it is also not conducive to the stability of product quality. Therefore, the corresponding parameters need to be adjusted according to the operating conditions of the centrifuge. Different brands of centrifuges have certain differences in parameter adjustment, domestic centrifuges are generally adjusted slagging time or operating water pressure, while the imported centrifuges are adjusted slagging strength.

Solution: domestic centrifuges is to shorten the slagging time or lower operating water pressure, imported centrifuges is to reduce the parameters of slagging strength.

3, centrifuge slagging failure alarm or slagging strength is too low alarm

Alarm with the slagging amount is too large alarm or slagging strength is too high alarm on the contrary, the centrifuge slagging failure alarm or slagging strength is too low alarm common reasons for slagging time is short or low pressure of the operating water. In addition, the centrifuge slagging failure alarm or slagging strength is too low alarm may also be the operation of the water channel blockage or slagging operation water seal broken, although the surface of the operation of the water pressure in the normal range, but slagging into the bottom of the drum when the operation of the water pressure can not be the top of the slider up, the slag deposited in the solid slag area can not be discharged in its entirety.

Solution: extend the slag time / raise the operating water pressure pressure / clean up the operation of the water channel / replace the slag operation water sealing ring

4, centrifuge current high alarm

Normal operation of the centrifuge if there is a high current alarm, the common causes are mainly centrifuge feed flow bias, or centrifuge slagging intensity is too large, or drum sealing is not tight leakage phenomenon, etc., these factors will increase the motor load and cause the current to rise, the need to investigate the cause and solve the problem in a timely manner.

Solution: reduce the feed flow / reduce the intensity of slagging / check the drum seals and replace the broken seals

5、Centrifuge vibration high alarm

Normal operation of the centrifuge if the vibration of high alarm, usually due to drum imbalance. The cause of centrifuge drum imbalance is mainly due to the impurities contained in the raw material oil unevenly distributed in the drum and lead to imbalance in dynamic balance. Generally centrifuges are set up with two levels of vibration alarms, i.e., a primary alarm and a secondary alarm. Centrifuge vibration high level alarm centrifuge can still continue to run, but in order to equipment safety, need to find the cause of high vibration as soon as possible and be eliminated. If it can not be eliminated, and the centrifuge still continues to run, it is likely to trigger the secondary alarm, then, for safety, the centrifuge will be forced to shut down.           

Solution: Disassemble the drum and clean the disks.

Translated with DeepL.com (free version)