Big ethylene optimizes operation: potential becomes "money force"
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The project leader Jiang Yong, director of the olefin plant of Yangzi Petrochemical Company of Sinopec, introduced that as one of the core technologies of the leading industry, key technologies for the optimal operation of ethylene plants have been started since September 2001 at the Yenzi Petrochemical olefin plant 700,000 tons/year ethylene The device is applied one after another. After 8 years of assessment of the operation of industrial production equipment, it has proved that without increasing the investment in major equipment, the operating potential of the existing production equipment has been fully utilized, and the goal of increasing production, saving energy and reducing consumption has been effectively achieved. In the past three years, a total of RMB 1.033 billion of new profits and taxes have been created for enterprises and the long-term foreign technology monopoly has been broken.
Jiang Yong pointed out that after the promotion and implementation of large-scale ethylene plant optimization and operation technologies, the major technical and economic indicators have reached or exceeded the international advanced level of similar devices. He believes that if the ethylene industry to promote the results in a wide range, not only can create significant economic benefits, but also will enable the automatic control of ethylene equipment to reach the international advanced level, to promote the integration of industrialization and information, to solve the independent innovation capability of China's equipment manufacturing industry Weak and high external dependence issues have important practical significance.
When it comes to the development of this technology, Jiang Yong introduced that building a new ethylene plant has a large investment and a long cycle. Relatively speaking, optimizing the technical and economic indicators and production and operating conditions of existing large-scale installations has the characteristics of low investment, short construction period, and quick results. It naturally becomes an important means for ethylene companies to independently innovate and improve their international competitiveness. This means using advanced process system engineering techniques to increase production, improve quality, and reduce consumption by eliminating bottlenecks.
Following this line of thinking, Yangzi Petrochemical focused on high-quality production and energy saving of large-scale ethylene plants. Based on the process characteristics and production operation of the key units in the production process, the research and development of large-scale cracking furnaces for ethylene plants was advanced from the perspective of optimal operation of industrial plants. Control and separation process advanced control and optimization of key production unit series of optimized operation technology, provide practical technology and optimize control software for industrial plant operation optimization.
With Yangzi Petrochemical as the main research and development entity, this large-scale ethylene plant optimized operation project, through years of integrated innovation and digestion and absorption and innovation, realized cracking process research and optimization, reaction process simulation and optimization, 100,000 tons cracking furnace temperature control and load The optimization of key technologies such as advanced optimization and other 11 subprojects has improved the yield of diene and significantly reduced energy consumption. In addition, through in-depth theoretical and applied research, they have also applied these technologies to the optimization of other complex industrial production processes.
The project has been applied to the Yangzi Petrochemical ethylene plant since March 2002. It has effectively solved the bottleneck problem of multiple-restriction devices with full-load, high-efficiency and safe operation, and further stabilized and optimized the operation of the ethylene production process. The main technical and economic indicators have reached or exceeded the international advanced level of similar devices, created direct economic benefits of accumulated new profits of several hundred million yuan, and promoted scientific and technological progress in China's ethylene industry and even the entire petrochemical industry.
Jiang Yong stated that many technologies and software developed by the project are first in the country, and 6 items have been formed in the aspects of cracking furnace simulation, intelligent control, optimization of combustion conditions, on-line automatic defocusing, and intelligent control of distillation towers. National invention patents, six computer software copyright registrations and five proprietary technologies. Among them, the intelligent control method for the invention patented ethylene plant cracking furnace won the first prize of Shanghai Invention and Creation Patent in 2004 and the 2005 China Patent Excellence Award.
The reporter also learned that the technical achievements of the project have been applied to many enterprises such as Shanghai Petrochemical, Qilu Petrochemical, and Guangzhou Petrochemical, effectively eliminating technical barriers that urgently need to be solved in the industrial production process. For example, the smoothness of key operating parameters such as cracking furnace temperature and load is increased by more than 30%, the loss of the finished Tower kettle in the distillation process is reduced by 2% to 12%, and energy consumption is reduced by more than 3% by avoiding “over-distillationâ€. Among them, advanced control and optimization technologies such as cracking furnaces, ethylene and propylene distillation towers have been widely applied to Sinopec's ethylene plants.