Dryer Regeneration Control System Design Of Olefin Separating In MTO

Dryer regeneration equipment is an important part of a coal-to-olefins plant. The performance of the dryer directly influences the following cryogenic separation unit. If the dryer has not done a good job, the pipeline of the separation phase may be blocked due to the iced water, thus affecting the safety of the entire production process. The temperature, flow and other parameters of regeneration gas also have a direct impact on gas pressure of the subsequent pyrolysis furnace gas system. Considering these above, I believe it will be meaningful to research and design a robust control system for the regeneration and drying process.This paper has firstly introduced the composition and operation of a dryer regeneration, then I designed some relevant hardware and software of the entire device with the consideration of process conditions and the general design principles, and some design innovations are proposed. According to the control requirements and economic reasons, I choose Emerson's Delta V as the major part of the control system. Following this, I configured the hardware and finished the corresponding functional design. The principle of instruments selection and the balanced flow meter was also introduced. The last part introduced some system software development environment, the fulfillment of sequential control by use of on-site controller software configuration, and the development of PC software.The results of the simulation and imitation debugging of system have shown that system has met the design requirements and effectively controlled the dryer regeneration.