| Cement is an indispensable basic raw material in the national economic construction,industrial construction and industrial chain optimization and upgrading.But for a long time,China's cement production has been in a situate of heavy pollution and heavy energy consumption.In the current environment that advocates energy conservation,emission reduction and sustainable development,the cement industry needs to optimize the traditional capacity structure.As the main special equipment for clinker cooling and heat recovery in cement production process,grate cooler plays a crucial role in energy saving and emission reduction.Therefore,improving the operation stability and synchronization performance of the traditional grate cooler clinker driving system is one of the important links in the cement manufacturing process at present.In this paper,the control of the grate cooler clinker drive system and the synchronous characteristics of the load loop are studied respectively.The details are as follows:First,according to the working conditions in the actual production process of the fourth-generation grate cooler,this paper uses Solidworks software to reasonably design the relevant structure and render part of the structure;the energy consumption and efficiency of three conventional speed regulation circuits are compared and the load induction control speed regulation mode is more suitable for grate cooler clinker pushing system.Thus,the corresponding hydraulic drive circuit is established and relevant parameters in the circuit are set;then the principle and characteristics of load sensitive system are described in detail.Second,the load sensitive valve and load sensitive pump in the load sensitive system of grate cooler are modeled respectively,the dynamic characteristics of the system are analyzed in detail.According to the transfer function,Matlab/Simulink software was used to establish the controller models of the classical PID and the auto-disturbance rejection PID of the grate cooler clinker propulsion system respectively,and the comparison of simulation results and the setting of adjustable parameters were carried out.It is concluded that the response time of the controller built by the adrc algorithm is 0.24s higher than the traditional PID control,and the overshoot and hysteresis characteristics are greatly reduced.However,slight disturbance will occur,indicating that adrc can improve the deficiency of response and overshoot in the traditional control system.Third,research on dynamic characteristics of various components of grate cooler load-sensing system under various environments by using AMESim software.The synchronous hydraulic circuit formed by the improved load-sensing valve post-compensation(LUDV)system is finally suitable for the clinker clinker propulsion system.Finally,based on the four synchronization control strategies,the improved grate cooler load-sensitive hydraulic synchronization contro 1 system is simulated for synchronization characteristics,and the sy nchronization displacement error of the same PID is 0.008006m;the synchronous displacement error of master-slave PID is 0.002401m;t he incremental synchronous displacement error is 0.001475m;the syn chronous displacement error of the bias coupling is 0.000083m.It c an be seen from the results that the deviation coupling synchronizat ion control strategy has more accurate control accuracy,which is ap plicable to the synchronization requirements in the actual production process and improves the synchronization control effect and positio n accuracy of single pump multi-actuator. |
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