Several factors affecting the separation effect of centrifuge
The working table of the centrifuge should be flat and firm, the work room should be neat and clean, dry and well ventilated, and the ambient temperature should be 5-32 °C. The safe and smooth operation of the centrifuge is a prerequisite for achieving good separation. In order to make it run at the best condition and ensure better separation effect, the interlock and alarm functions should be set to protect the equipment. The main and auxiliary motors should be controlled by independent inverters and set a separate start button. In special cases, the spiral is started separately. Wear affects both the separation of the centrifuge and the safe and smooth operation of the instrument. And when the ambient temperature is below 0 e, it is necessary to do antifreeze work.
Centrifuges are inertial test equipment that tests and calibrates the performance of high precision accelerometers at high overloads. The accuracy of the acceleration generated by the rotation of the centrifuge directly affects the calibration accuracy of the accelerometer [1~5]. The drum diameter, drum cone angle, diameter-to-length ratio and manufacturing materials not only determine the processing capacity of the centrifuge, but also affect the separation effect; the drum rotation speed of the centrifuge, the difference between the drum and the spiral The influence of factors such as the thickness of the liquid layer, the amount of feed, and the nature of the raw materials and the operating conditions of the equipment on the separation effect are also crucial.
The adjustment of the thickness of the centrifuge liquid layer is very important, which directly affects the separation effect and the vibration degree of the centrifuge, and also determines the residence time of the clear liquid in the centrifuge. When the feed amount is constant, the thicker the liquid layer, the longer the residence time of the feed liquid in the centrifuge, and the better the separation effect is achieved. It is obvious that the reasonable liquid layer thickness is also important to maintain the optimal working state of the centrifuge. factor.
The centrifugal maneuver balance system consists of data acquisition, data analysis and processing, unbalanced amount calculation, and execution part. In order to ensure the accuracy of the system balance, a high-performance capacitive micrometer is selected as the vibration sensor. Through the data processing of the vibration signal, the first harmonic component generated by the unbalanced vibration is separated; the principle of the influence coefficient method is used to measure the unevenness. Measure and solve the problem. Finally, the PLC controls the stepping motor to drive the balance slider of the adjustment surface of the centrifuge to complete the dynamic balance of the centrifuge.
The centrifuge is flushed with fresh EG after each run. Increasing the amount of flushing EG and the number of flushing, and draining the residual solid phase particles in the machine as much as possible can not only improve the separation effect of the centrifuge, but also effectively avoid the occurrence of equipment vibration and drum blockage accidents, which is beneficial to the maintenance and repair of the equipment. .
This article was edited by the laboratory instrument - Hunan Gilson Technology Development Co., Ltd.
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