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The building is an important raw material for the production of coatings, latex paint, emulsion worldwide annual production of about 1,000 tons, the company Rohm and Haas, BASF, Union Carbide, Nippon, ICI and other major manufacturers. Established early emulsion manufacturing enterprises, have been widely used automated production mode, to the development of large-scale, automated direction. The emulsion products quality, guarantee, as much as possible to use the automated system for control of the production process, companies save labor, saving the cost of management the key considerations direction of. BATF Industry Co., Ltd. From the end of 2009 to remain cost-effective construction emulsion market is fiercely competitive advantage, production process control automation concept. Full understanding of similar chemical companies, other companies of the automation process control has been achieved, combined with the actual situation of the company itself, gradually clear the company's production process automation and improvement program. Rely on existing technical capacity prior exploratory successfully improved set of reactor control system based on progressive, the other reactor automation of the production process to improve their work. The main work and innovation of this paper is to: 1, a detailed analysis of the existing buildings emulsion production process automation, and explore feasible methods of process control. In this thesis through the analysis of the original manual production process of feeding accuracy, dropping rate, stirring speed, and the process to ensure the reactor temperature control process method, the entire system control problem is divided into several different structural modules, again respectively for each structural block research solution. 2, the analysis of the technical performance of the inverter used in the original manual production system. In this thesis, analysis, inspection of the relevant technical information to confirm the original inverter can take advantage of the effective means of control, and to assess their ability to meet the improved control system requirements, as well as how to improve the control system application; 3, the choice of automatic control valves. Technical characteristics of this thesis by comparing the various available automatic valves, system used to determine the specifications of all valves, These valves include raw material into the valve, dropping speed control valve, hot and cold water inlet and outlet valves, etc.. The choice of these valves, it is necessary to ensure the explosion-proof performance requirements, but also be able to achieve the required control accuracy and functionality, the scene at the same time meet the installation requirements; 4, to select the most weight measurement device suitable for use by an automated system. Weighing the technical characteristics of a metering device according to the conventionally used in this thesis by comparing several differences, selections available site aids cylinder emulsified cylinder using a metering device. Different range and vary greatly, the accuracy of the dropping conducting dropping flow control requirements are not the same. Weight measurement device selected, weighing accuracy requirements than able to meet the test development system can also facilitate the subsequent entire workshop in networking. 5, to determine and control the means of communication between the various modules in the system used. This thesis by performing a performance comparison of several communication mode, and ultimately determine the communication mode used in the entire control system. Communication include: communication between the programmable controller (PLC) and weighing instruments communication between the inverter and the PLC and IPC. Determine the PROFIBUS-DP bus communication between the PLC and the weighing instrument to facilitate the expansion of the system; between IPC and PLC, RS232 serial communication. 6 to complete the circuit design and program design of the control system, and, ultimately, the newly developed control system debugging success in the field, and put into a production run.
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