Research and Modernization of the Automated Control System of the Grain Drying Technological Process at the Olgopil Agricultural Company
Students Name: Viniarskyi Bohdan Ihorovych
Qualification Level: magister
Speciality: Computer-Integrated Systems for Industrial Control
Institute: Institute of Power Engineering and Control Systems
Mode of Study: full
Academic Year: 2022-2023 н.р.
Language of Defence: ukrainian
Abstract: Vinyarskyi B.I., Stasyuk I.D. (head). Research and modernization of the system of automated control of the technological process of grain drying at the Olgopil agricultural company. Master’s qualification work. - Lviv Polytechnic National University, Lviv, 2022. Extended annotation. The master’s thesis is devoted to the development of a system for automating the grain drying process. The work provides a general overview of the technological process carried out in the drying process. The dryer is analyzed as a technological control object, on the basis of which the optimal scheme for automating the grain drying process is selected. The Siemens S7-1200 controller was used to build the technological process automation system. Also, the MKR developed a program for the operation of the controller and a diagram of external connections of the microprocessor controller with selected technical means of automation. Modeling of the system of automatic humidity control of the spent drying agent in the process of grain drying was carried out. Provisions are made for alarming, protection and blocking of regulation circuits. The object of the researchis the Grotter-6 grain dryer. The purpose of the study is to analyze the operating modes of solid substance dryers regarding the possibilities of saving thermal energy in the technological process of drying under the condition of preserving the quality indicators of grain for the development and further implementation of measures to improve the system of automatic control of the technological process. In the first chapter of the master’s qualification work, a description of the technological part of the grain drying process is made. The theoretical foundations of the technological process, the material and heat balance are given, and a technological map of the parameters of the grain drying process is created. In the second section, the FSA of the process was developed, a schematic diagram of the relationships between the technological parameters of the dryer was drawn up, and its input, output and disturbing parameters were determined. During the execution of the third section of the simulation, a study of the SAR of the humidity control of the spent drying agent was carried out. In the fourth chapter, the principle of selection and technical characteristics of peripheral devices of the automation system are given, the Siemens S7-1200 microprocess automation tool is selected. TIA Portal software was used to implement SCADA/HMI software. In the fifth chapter, the software of the computer-integrated technological process control system is developed. Algorithms for the functioning of regulation circuits have been created. The program development procedure is described, tags and excerpts of SCADA/HMI functioning scripts are given. An example of the graphic interface of KISK and all additional displays, emergency messages and scripts is given. During the implementation of the sixth section, excerpts of connecting peripheral devices to the PLC, implementation of the PLC power circuit are given and described. The device is fully connected to the PLC channel. In the seventh chapter, the specification of technical means of atomization for the grain drying process was selected.