水泥聯(lián)合粉磨生產(chǎn)過程控制系統(tǒng)研發(fā)
[Abstract]:Cement grinding is a key link in the production of new dry cement, which not only relates to the power consumption of cement production, but also determines the quality of cement finished products. The combined grinding system has the characteristics of strong coupling, large time-delay and time-varying, which makes it difficult to control the production process, and it is difficult to guarantee the output and quality of cement products by relying solely on the related process parameters and the test results of specific surface area. With the aid of Malvern particle size analyzer, a cement combined grinding process control system is developed based on particle size distribution and mill load. Supported by the key technology research and application demonstration project of intelligent factory (2015ZDXX0101F01), the work of this paper is as follows: (1) in order to establish a reasonable control scheme, on the basis of in-depth analysis of the combined grinding process, The control points of mill load and cement particle size distribution are determined. The key technological parameters affecting the load and particle size distribution of the mill are determined, and the corresponding control ideas and strategies are put forward. (2) in order to overcome the characteristics of time-varying, coupling and time-delay of grinding system, Bang-Bang control is used to adjust the opening of cold air valve according to different working conditions of mill load; According to the different working conditions of particle size distribution, the control method of combining Bang-Bang and dynamic matrix control is used to adjust the separator and other equipment. After filtering the field data, two models of particle size content less than 3 渭 m and 32 渭 m grain size content were established by least square method. On this basis, the particle size controller of cement combined grinding system is designed. After prediction model, rolling optimization, feedback correction, the controller parameters are determined and verified by simulation. The controller is encapsulated into a dynamic link library file for mixed programming. (3) in order to realize the process control of cement combined grinding production, the production line DCS and the OPC Server, of cement granularity analyzer are configured, and the OPC client based on C # is developed, which realizes the data exchange between different platforms. On the basis of (1) and (2), the production process control system of cement combined grinding is developed. The effectiveness of the control system for cement combined grinding process was analyzed from three aspects of mill load, particle size distribution and 28 days compressive strength combined with engineering application.
【學(xué)位授予單位】:濟南大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TQ172.632;TP273
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