Break foreign monopolies and alleviate the shortage of resources
On July 10, 2019, the "Industrial Application of 300,000 Tons/Year Styrene Complete Technology" project completed by Changzhou Ruihua Chemical Engineering Technology Co., Ltd. passed the evaluation of scientific and technological achievements organized by the China Private Science and Technology Promotion Association in Beijing. The experts at the meeting agreed that the complete set of technology has independent intellectual property rights, the technical level has reached the leading level, and the economic and social benefits are significant.
The picture shows the site of the scientific and technological achievement evaluation meeting of "Industrial Application of 300,000 Tons/Year Styrene Complete Technology"
After passing the review, the expert group believed that the main innovation and characteristic of the project technology was the development of low energy consumption liquid phase alkylation ethylbenzene synthesis and high vacuum, low water ratio ethylbenzene adiabatic dehydrogenation reaction process, and the unique design of ethylbenzene The dehydrogenation high-temperature system treatment plan has formed a new set of 300,000 tons/year styrene technology; key equipment such as dehydrogenation reactor, ethylbenzene superheater and intermediate heat exchanger has been designed to increase the styrene production capacity by 10% and extend the equipment During the operation cycle, the device runs stably; the device achieves a material consumption of 1.0555t (benzene + ethylene)/t styrene, and an energy consumption of 208.9kg standard oil/t styrene. Compared with the advanced indicators of the national standard GB32053-2015, the energy consumption is reduced by 21%; According to the inspection by Changzhou City Product Quality Supervision and Inspection Institute, the purity of styrene reaches 99.9%, which is better than the 99.8% index of national standard GB/T3915-2011 superior grade.
Used by Xinyang Technology Group Co., Ltd. and other users, the feedback is good. Experts suggest to further increase the promotion of complete sets of technologies to meet market demand.
According to Xu Zhigang, chairman of Changzhou Ruihua Chemical, the industrial application of 300,000 tons/year styrene package technology was independently developed by the company. The first domestic package with independent intellectual property rights was placed in a successful start-up in May 2016. In more than a year, it has achieved long-term, excellent and stable operation with excellent performance indicators, making it the largest and best operating performance device for domestic styrene technology construction and application. Currently, the National Development and Reform Commission industry catalog requires an annual output of 200,000 tons, and the international average production capacity is 260,000 tons/year. The existing domestically-produced styrene plant in operation in my country is 250,000 tons/year, and the 300,000-ton/year technology has been successfully applied, breaking the foreign monopoly, marking a major breakthrough in my country’s domestically-produced styrene complete set of technology, which is a super-large scale technology in my country. The development of the chemical styrene project has laid a solid foundation.
At present, the total energy consumption of domestic styrene plants is generally about 280kg standard oil/t styrene, and the total material consumption is generally 1.075t (benzene + ethylene)/t styrene. Due to the reduced energy consumption and material consumption, this complete set of technology can save costs every year. About 80 million yuan. In order to alleviate the shortage of styrene resources in my country, after the success of the 300,000 tons/year technical project, the company signed contracts and gradually implemented 400,000 tons/year, 500,000 tons/year, and 600,000 tons/year complete technical projects. In the near future, an 800,000-ton/year project will be launched to create a world-class super large-scale styrene complete set of technology to meet the needs of domestic and foreign markets with advanced technology.
It is understood that in recent years, with the advancement of science and technology and the rapid development of various industries, the demand for polystyrene resin is increasing, which has contributed to the sharp increase in the demand for styrene. Although my country's styrene production capacity and output have made considerable progress, due to the more rapid development of styrene downstream products, there is a large market gap. In the past 10 years, the import volume of styrene monomer in my country has maintained a scale of 3.5 million tons per year. Domestic styrene products still cannot meet the market demand, and the gap has not been alleviated. In addition, in addition to importing styrene monomer, my country also needs to import a large amount of polystyrene, ABS, and downstream products of styrene such as styrene butadiene rubber and latex. If all are converted into styrene, the contradiction between supply and demand of styrene in my country is still Very big.
Xu Zhigang said that before the successful development of the complete set of technology, all styrene plants with an annual output of 300,000 tons/year and above in my country were constructed using foreign styrene technology. Foreign technology is in a monopoly position, and domestic technology is used to construct styrene. The equipment, especially the early construction of styrene equipment, has serious problems of high energy and material consumption and poor economic benefits. Therefore, the development of technologically advanced large-scale styrene technology is of great significance.
The picture shows the exterior view of the 300,000-ton styrene complete technology project.
In order to maintain the continuity of styrene technology research and development and seek technological progress in large-scale equipment in this field, Ruihua Company proposed to develop advanced large-scale styrene complete sets of technology as the company’s long-term research task. The problem of storage vaporization and supply. Under the conditions of low benzene to ene ratio, the alkylation reaction improves the selectivity of ethylbenzene, avoids the formation of butadiene benzene by-products and reduces the production of polyethylbenzene residual oil, and reduces the energy consumption of the alkylation reaction; Low-temperature heat recovery and utilization; high-vacuum reaction; high-temperature system stability and other technical difficulties and process bottlenecks. On the basis of domestic styrene technology, after ten years of continuous technical research, the industrial application of 300,000 tons/year styrene package technology has been successfully developed, and the main technical indicators have all reached the design requirements.
Xu Zhigang said that the industrial application prospects of 300,000 tons/year styrene package technology are broad, especially in Southeast Asia where styrene resources are scarce, and there are broad prospects for the promotion of styrene package technology abroad.
Group photo of experts and relevant persons in charge of the organization and enterprise at the review meeting
This award has been published in China Chemical Industry News