Abstract
In chemical production, in order to correctly guide the production operations to ensure production safety and product quality and achieve process automation, an indispensable work is accurate and timely checking out the production process in all relevant parameters. This article is mainly about the process control design on the Tacsifun project based on the relevant national norms and standards and the provided relevant professional design information. The main content of design includes the following five sections. Firstly, identify the controlled variable (temperature, flow, level, pressure, etc.) and manipulate variables based on process requirements. Secondly, select the appropriate instruments to measure the accused variables, choosing manipulated variable reasonable to ensure that the accused variable index. Thirdly, select the executive body by the production of technical features. Fourthly, select the controller and the control law and determine the control parameters depending on the control objectives and the characteristics. Fifthly, design the section control to automatically control, implementation of its operations, high level alarm and interlock and control requirements in DCS system by the requirements,. This article is mainly charged by the identified variables to select the appropriate detection instruments and actuator, and gives all the detection principle and the principle of selection in all the selected instruments.
Key Words: Chemical industry Process control DCS Temperature Flow
