Research on control system of disk pelletizing based on flow target control method
A disk pelletizing automatic control system based on flow rate target was proposed to ad-dress the difficulties in accurately controlling pellet size and outdated production methods in the pro-duction process of pellet ore.Firstly,relying on image recognition algorithms,basic information such as particle size,distribution,and number of pellets are extracted from actual production process pellet images.Secondly,the system analyzes and calculates the received pellet information to obtain the cur-rent production status and particle size change trend of the pellets.Finally,the system establishes a flow target setting value based on the trend of pellet particle size change and production status,and adjusts the valve opening adjustment cycle appropriately according to the pellet production status to adapt to production.The system was actually applied to the control of a disk pelletizer in a domestic steel plant.The practical results show that in terms of the difference between the average particle size and the target particle size,the automatic control mode reduces the error by 32.54％compared to traditional manual control mode.Moreover,under different pelletizing conditions,the proposed control system exhibits stable fluctuations in flow during actual production.Compared to manual control mode,the root mean square error of pellet size is reduced by 6.59％,which has good stability.It has a positive effect on improving the production efficiency and qualification rate of pellets,and reducing manual labor intensity.
flow target control methoddisk pelletizerparticle size detectionimage recognitionPLCindustrial control
NETL
NSTL
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