【Ten Years of Rapid Development in Chemical Equipment】From 1885 to 2024, intelligent control technology for methanol-to-olefins reached international advanced levels
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Safety first. Prevention first: Let’s praise and encourage the achievements made in China’s chemical technology and equipment industry. **********************【Ten Years of Rapid Development in Chemical Equipment】A continuously updated summary post is available; feel free to join the discussions at https://bbs.hcbbs.com/thread-3576046-1-1.html (Source: Haichuan Chemical Industry Forum) *****************On June 20, 2024, the project \"Research and Application of Intelligent Control and Process Optimization Techniques for Large-Scale Methanol-to-Olefins Plants\", carried out in collaboration between China Coal Shaanxi Energy & Chemical Group Co., Ltd. and Beijing Saiputech Technology Co., Ltd., was evaluated as a scientific and technological achievement by the China Petroleum and Chemical Industry Federation in Beijing. The appraisal committee, headed by Zhang Laibin, an academician of the Chinese Academy of Engineering and professor at China University of Petroleum (Beijing), concluded that this achievement possesses fully independent intellectual property rights and has reached an internationally advanced level. In particular, the twin-model technology for the integrated reaction/regeneration/separation process in methanol-to-olefins industrial plants, along with its applications, are at the international leading level; the committee recommended accelerating the promotion and application of this achievement. The 1.8 million tons per year methanol-to-olefins plant built and put into operation by China Coal Shaanxi Company in July 2014 utilizes a domestically developed DMTO patent process technology. The control system of this plant is characterized by multiple variable disturbances and strong coupling nonlinearities, making it difficult for conventional control methods to keep the plant operating at its optimal level over the long term. It is imperative to achieve intelligent operation and control, as well as energy savings and consumption reduction, through intelligent process modeling, advanced control, and optimization. In 2021, the company collaborated with CipTek to develop integrated online and offline process twin models based on research using online process twin models. These models include reaction models, regeneration models, catalyst circulation models, separation models, etc., as well as modules for operation optimization and intelligent, precise control of 17 reaction/regeneration/separation systems. This led to a series of achievements in intelligent control and process optimization technologies for large-scale methanol-to-olefins plants.
【Ten Years of Rapid Development in Chemical Processing Equipment】1879–2024: Large-scale road use, 300-series, 3-eccentric 904L butterfly valves https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5666195 (Source: Haichuan Chemical Industry Forum)
This achievement has mainly yielded three innovations. First, a twin model of the integrated reaction/regeneration/separation process for methanol-to-olefins plants was developed; after online operation, the relative average error between the predicted yields of dienes and the actual values (as recorded in inventory data) was within 1%, meeting the requirements for precise control and operational optimization. Secondly, for the first time, an intelligent and precise control system along with a real-time operation optimization system specifically designed for industrial units that produce olefins from methanol has been developed. This enables full automation of the entire production process, intelligent optimization of operations, as well as rapid and automatic flexible adjustments during production, resulting in a significant reduction in fluctuations in key process parameters. Thirdly, based on the integrated reaction/regeneration/separation process twin model and safety island control concept of methanol-to-olefins plants, an abnormal operating condition management (safety avoidance) system for such industrial plants was developed for the first time, enabling the detection and early warning of abnormal conditions as well as online analysis to ensure safe and stable operation. To date, this achievement has resulted in **6 invention patents being granted**. It is reported that between May 2022 and September 2023, the MTO intelligent precision control system, the operation optimization system, and the intelligent precision control system for olefin separation were successively put into use in the methanol-to-olefins units located in the coal chemical plant area of China Coal Shaanxi Company. These systems enabled the intelligent and automated operation of the MTO and olefin separation units, filling a gap in the field of optimization and control for MTO reverse regeneration systems in China. The operation results show that the methanol consumption per ton was reduced by 0.6% (0.018 tons of methanol per ton of diene), energy consumption was decreased by 1.21% (5.08 kilograms of standard coal per ton of olefin), and carbon emissions were reduced by 0.66% (equivalent to 83,500 tons per year), resulting in significant economic and social benefits. At the same time, the operators transform from those who perform the tasks to supervisors, which significantly reduces the workload on the employees and enhances their sense of happiness and commitment.
Give a thumbs up and encouragement to the achievements of China’s chemical technology and equipment industry!