How to Avoid High and Low Pressure Surge in High-speed Refrigerated Centrifuge?

During the experiment, the failure of the high-speed refrigerated centrifuge can cause the experiment to fail, or not to run. In the face of centrifuge failure, many centrifuge operators are helpless. Although they can find a centrifuge supplier to solve the problem, it takes two or three days from communication to after-sales maintenance. Therefore, it is still time-consuming. In fact, many uncomplicated problems of the centrifuge can be solved by the operators themselves, which can save a lot of time.

1. The hazards of high and low pressure surges produced by high-speed refrigerated centrifuges

From the perspective of the performance curve of the high-speed refrigerated centrifuge , when the surge of the refrigerated centrifuge occurs, its operating point must enter the surge area, so the severe surge of the refrigerated centrifuge is also closely related to the pipe network. In the theoretical operation of the high-speed refrigerated centrifuge, the following factors will lead to the occurrence of surge and ignition: the switching defect of the air separation system. The vent valve or anti-surge valve is not opened in time during electrical defect or chain shutdown. The valve entering the main heat exchanger or the molecular sieve adsorber cannot be opened in time, resulting in a high discharge pressure of the high-speed refrigerated centrifuge, resulting in a sharp steepening of the characteristic curve of the pipe network, and the centrifuge and the pipe network are separated from the working point to move rapidly and enter the surge area incurs surge. During the high-speed refrigerated centrifuge start-up operation and boosting process, the operation is not harmonious, the boosting speed is fast, and the opening of the inlet guide vane is small; the quality of the power grid is not good, the power grid cycle is dropped or the voltage is too low, which makes the motor stall, and the flow rate of the centrifuge is reduced. Surge zone; refrigerated centrifuge flow path obstruction. Due to the leakage of the cooler or the fouling of dust, the flow passage of the stage is rough, and the section section becomes smaller.

2. How to avoid high and low pressure surge of high-speed refrigerated centrifuge?

The spindle control system controls the rotation of the entire centrifuge boom, and its accuracy and stability are critical to the entire system. The spindle control system controls the rotation speed, rotation mode and display operating status of the centrifuge. The high-speed refrigerated centrifuge is responsible for transmitting some operating status to the remote central management machine, and can receive the control command of the central management machine and control the operation of the spindle through the WDM driver.

The frequency converter drives the drum of the high-speed refrigerated centrifuge, with stable start and adjustable separation factor; it overcomes the shortcomings of the traditional DC carbon brush centrifuge, such as high noise, high failure rate, short service life, and unstable rotation speed. Separation equipment replacement products. AC variable frequency centrifuge has distinct characteristics and representation in several important indicators such as shock absorption system and variable frequency motor.

High-speed refrigerated centrifuges have large air intake resistance, such as filter blockage or impeller inlet blockage; under normal conditions, the device is debugged through surge debugging, and the pressure and current are set through PI to effectively avoid high/low pressure surges.

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+86 13485601308