Superheat temperature control method for centrifugal compressor in MVR evaporation system

According to the overheat temperature control method for the centrifugal compressor in the MVR evaporation system, the PLC automatic control technology is adopted, temperature changes are tracked in real time, the water pumping flow of the variable frequency water pump is adjusted according to the outlet steam temperature deviation and the deviation change rate, the characteristic state of the corresponding condition is selected from the characteristic mode library, and the overheat temperature of the centrifugal compressor in the MVR evaporation system is controlled. The frequency given value is transmitted to an input channel of the frequency converter through the analog-to-digital conversion module, the deviation between the outlet steam temperature and the target temperature is tracked in real time, the frequency increasing value or the frequency decreasing value of the variable frequency water pump is compensated, automatic frequency adjustment of the frequency converter is completed, and therefore the w