Industrial mud pump has the characteristics of (flow) Q∝N (speed), (head) H∝N2, (shaft power) W∝N3 and so on. If the vortex flowmeter is used, when the flow rate is reduced, the speed of the pump is also decreased, and the shaft power can be reduced a lot. If the speed of the mud pump is changed to adjust the flow of mud, a large amount of electric energy can be saved. And frequency converter has good driving performance, including * control algorithms such as PID control, the control function of the rich and remarkable energy-saving power saving features, so the frequency converter can be used for modification of the original feed way, through the electromagnetic flowmeter and kiln speed feedback signal of mud pump to realize frequency control of motor speed, speed and slurry pump kiln speed synchronization, cancel the original slurry tank back, So the rotary kiln feeding automatic control, to achieve energy saving, consumption reduction, improve the kiln running rate and clinker quality.
The speed signal of the kiln system is sent to the PLC A/D module after adjusting by the kiln speed proportional given device, and then sent to the PLC after processing and conversion by the A/D module; Flow meter changes the flow signal into 4-20mA standard signal and then sends it to PLC A/D module, and sends it to PLC after processing; PLC will kiln speed ratio output signal as the given value, given to traffic input signal as the measured value, PID arithmetic, the arithmetic results to the D/A module for processing, standard 4-20 ma output signal, sent to the inverter F540L, control the output of the inverter, control motor speed, in order to achieve the purpose of the control of quantificationally, achieve closed-loop control. In the selection of flowmeter, in order to meet the safety, stability and reliable demand of production, XD-LDE series electromagnetic flowmeter is specially selected. The flowmeter has stable performance, accurate measurement, high degree, and can provide a variety of signal transmission modes, has a high reputation and degree in the field of flow measurement, has been widely used.
In the use of electromagnetic flowmeter in the technical requirements are also very high, Hangzhou Yucheng instrument in the test time mainly used in the field of industrial automation technology is more mature, the application of a wide range of solutions - PLC control frequency conversion speed regulation technology. The technical scheme considers the automatic/manual operation function, when the manual/automatic switch, can achieve no disturbance switch, debugging and maintenance is more convenient.
Electromagnetic flowmeter has a very high status in the large family of flowmeter. When tested with electromagnetic flowmeter, the measurement accuracy of electromagnetic flowmeter is not affected by the changes of fluid density, viscosity, temperature, pressure and conductivity, and has good stability. Electromagnetic flowmeter sensor induced voltage signal and the average flow rate is linear relationship, so the measurement accuracy is high. At the same time in the composition of the electromagnetic flowmeter, the sensor part only lining and electrode contact with the measured liquid, as long as the reasonable choice of electrode and lining material, corrosion and wear resistance.
