The biggest success in the history of Chinese chemical industry: independent PX Technology

wallpapers Industry 2020-12-09
As of July 31, the 600000 T / a Aromatics Complex of Sinopec Hainan refining and Chemical Co., Ltd. has been running smoothly for 20 months, and its overall performance has reached the international leading level.

to the insiders, the annual capacity of 600000 tons, compared with the annual demand of nearly 20 million tons in China, is simply "not enough for foreigners"; however, the device is still regarded as "an unprecedented success in the history of China's chemical industry", and some experts even described its achievements as "a thunderbolt". The reason is that, for decades, aromatics, the last short link in China's petrochemical industry chain, has a huge impact on China's petrochemical industry Fill in the blanks.

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the pain in people's hearts: "only want to eat a peach, but want to buy the entire orchard"

Wu Wei, deputy chief engineer of

China Petrochemical Institute of petrochemical technology, introduced that most of the organic chemicals in the world are 8 million kinds, of which more than 30% use aromatics; and 40% use ethylene, which adds up to more than 80%. Therefore, ethylene and aromatics are two basic raw materials, and their technology and production capacity mark the petrochemical industry level of a country.

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are the most important two rings of modern petrochemical industry chain, but the development level of ethylene and aromatics in China shows a serious imbalance: the ethylene production capacity increased from 459000 tons / year in 1978 to more than 17 million tons / year in 2014, and the global ranking rose from the 10th to the 2nd. At the same time, the technical level has rapidly entered the advanced ranks of the world.

has formed a number of independent core technologies through "Introduction digestion absorption integrated innovation independent innovation", and the localization rate of ethylene equipment has reached more than 80%, including complete sets of technologies such as large-scale ethylene cracking furnace, polypropylene, acrylonitrile, catalytic pyrolysis of heavy raw materials, SBS Elastomer, etc., and the million ton ethylene cracking gas compressor technology has reached the world advanced level Based on the domestic market, it has reached or approached the advanced level in the world. In general, it has the ability to build a million ton ethylene plant with independent technology, and has formed an ethylene industrial cluster with "two continents and one bay" in the Pearl River Delta, Yangtze River Delta and Bohai Bay Rim.

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however, before that, only UOP company in the United States and IFP company in France mastered the complete set of aromatic hydrocarbon technology in the world, forming a monopoly in the technology market, and the technology was extremely tight and expensive. Sun Lili, general manager of Sinopec Engineering Construction Corporation, recalled that in 1975, the technical cost of PX plant with an annual output of 27000 tons was as high as 4 million US dollars; at present, for a set of PX plant with an annual output of 600000 tons, the technical license fee is more than 100 million yuan, and the imported adsorbent is as high as 200-300 million yuan. This situation of "only want to eat a peach, but want to buy the whole orchard" has become a great pain in the hearts of Sinopec people. The petrochemical foundation of

,

and "aromatics" must be in our own hands and can not be controlled by others. The petrochemical foundation of

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and "aromatics" must be in our own hands and can not be controlled by others Sun Lili stressed. At present, the global annual consumption of aromatics for chemical purposes is about 120 million tons, and there are more than 130 aromatic production plants in developed countries and regions such as the United States, Europe, Japan and South Korea, she said. However, PX is the most representative aromatic hydrocarbon with the largest consumption. In 2014, China's PX consumption was about 20 million tons, and the fiber produced by PX was equivalent to replacing the cotton produced by about 230 million mu of land, which has irreplaceable strategic significance for solving the contradiction between grain and cotton and maintaining the "red line" of 1.8 billion mu of cultivated land.

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are such important basic raw materials that "if you don't do it yourself, others will have the right to speak". Sun Lili said that China is currently the world's largest PX consumer, with an average annual growth rate of more than 20% in the past 15 years. However, due to the lack of self-sufficiency and dependence on imports for a long time, the imports in 2014 were about 10 million tons, accounting for about half of the consumption. At the same time of domestic people's protest against the development of PX industry, foreign countries have built new PX devices for the Chinese market. Industry insiders believe that it is possible for foreign consortia to create public opinion in China and instigate people to boycott PX project.

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have worked hard for more than 40 years and generations to create many "world's most"

and

aromatics complete sets of technologies. They are high-end technologies with complex systems and technology intensive, and are highly integrated and difficult to develop. "It is not a feat in a day.". Xie Zaiku, director of Sinopec's science and Technology Department, said that the success came after more than 40 years and generations of efforts.

he introduced that PX technology is the core part of the complete set of aromatic technology. Most of the PX units introduced in China earlier came from UOP company of the United States. After that, the successful localization of adsorbent and the promotion and application of the adsorbent in the 600000 T / a large PX project of Hainan refining and Chemical Co., Ltd. at the end of 2013, the scale reached the maximum processing capacity of a single series. The device has been successfully put into operation for nearly 20 months, creating many "world's highest": the energy consumption per ton of product is only 75% of the international advanced technology, and the cost per ton of product is reduced by 6% compared with the international advanced level The purity of the product is above 99.8%. The overall technology is in the international leading level.

Xie Zaiku stressed that in view of the social panic that PX was demonized, Hainan refining and chemical company has taken "zero pollution, zero leakage, zero emission and intrinsic safety" as an important construction goal since the beginning of the project construction. The sulfur dioxide content in the flue gas is as low as 20 mg / standard cubic meter, which is far lower than the national first class emission standard, reaching the world advanced level; innovative and efficient furnace integration Its greenhouse gas carbon dioxide emission is 12000 tons per year compared with the international advanced level; it is the first energy cascade heat utilization technology, which not only greatly reduces the energy consumption of the device, but also realizes the power transmission from outside to outside, with 70000 kilowatt hours per day; it makes a breakthrough in replacing physical adsorption with catalytic reaction, which greatly extends the catalyst life and reduces solid waste emissions by 98%. "Deep energy conservation and emission reduction meet the requirements of sustainable development of resources and environment".


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