Discuss the advantages and disadvantages of large-scale ethylene cracking units with a capacity of one million tons in China!

The new furnace that Zhenhai Refining & Chemical added this year has a capacity of 200,000 units

I’m keeping an eye on this – there are way too many ethylene projects being launched recently. Quanzhou is using KBR, and it seems that other new projects also use S&W; Lummus no longer focuses on this area, as it has achieved good results in the coal chemical industry. It seems that Linde also pays little attention to the domestic patent market; after working with Jihua and Dushanzi, it has basically achieved no significant results

It seems you know more about this. I’m currently comparing different cracking furnaces, and it seems that using SEI panels requires a large investment – mainly in terms of cost! But comparisons still need to be made with other furnace types! It’s a bit difficult!

The northern furnace of SEI seems to be pretty good; its separation process isn’t much different from that of S&W, and Wuhan Ethylene uses SEI’s technology.

Dear seniors, are there any comparison documents for mainstream furnace types? There are those quite obvious advantages and disadvantages. For example, with the KBR SC-1 model, the yield is relatively good, but its obvious drawback is that the tubes are too thin; once coking occurs, it has a significant impact, and the tubes can easily get blocked

2016-07-25 On July 21, the country’s largest gas cracking furnace with a capacity of 200,000 tons per year underwent performance evaluation. This gas cracking furnace, which possesses entirely independent intellectual property rights owned by Sinopec, has been operating steadily at Zhenhai Refining & Chemical Complex for 30 days. This marks another improvement in the quality of China’s independent innovation capabilities in the field of large-scale ethylene production, adding further value to China’s reputation in terms of refining technologies. 　　The cracking furnace is the key facility and core equipment for producing ethylene. The operation of Zhenhai Refining & Chemical’s 200,000 tons per year gas cracking unit has not only increased the production capacity of the ethylene plant by 10%, but it has also provided greater opportunities for optimizing raw materials and more flexible methods, thereby raising the overall competitiveness of ethylene production to a new level. 　　The gas pyrolysis furnace utilizes Sinopec’s own CBL pyrolysis technology, and features four innovative advantages: the largest scale, the ability to handle both gas and liquid materials, a dual-chamber design, and environmentally friendly technology. 　　The design, manufacturing, and construction of the 200,000 tons per year gas cracking furnace were all carried out domestically; it was designed and constructed by Sinopec Refining & Chemical Engineering Company (SEG), highlighting the competitive advantages of China’s refining and chemical technology. As the owner, Zhenhai Refining & Chemical, along with the research, design, construction, and supervision units, work together in unity to strive to create high-quality and exemplary projects. It took only 25 months from pile driving to completion by CCCC, and only 5 months from the start of furnace heating to the commencement of production. 　　Currently, the operation of this furnace remains stable; the proportion of naphtha has further decreased, the raw materials are more lightweight, and the yield of high-value-added products has increased.

On May 4, 2020, TechnipFMC announced that Zhejiang Petrochemical Co., Ltd.’s (ZPC) large-scale ethylene plant with an annual production capacity of 1.4 million tons in Zhoushan had been successfully put into operation, using TechnipFMC’s patented technologies and process designs. The trial run took only about three days. This ethylene cracking furnace is the main unit of the ZPC refining and petrochemical integration project, and construction began on it in 2016. In addition to ethylene cracking technology, TechnipFMC also provides key proprietary technology components, including thermally integrated rectification systems, corrugated trays, and air oxidation processes. TechnipFMC’s Ultra-Specific Conversion (USC®) U-shaped coiling ethylene technology is an energy-saving and efficient solution.

The Hengli Petrochemical (Dalian Changxing Island) Industrial Park is gradually making full use of its integrated advantages. Hengli’s 1.5 million tons per year ethylene and 1.8 million tons per year ethylene glycol production facilities boast the largest-scale plants for producing ethylene, ethylene glycol, and styrene in the world. These facilities utilize world-class process technologies from companies such as Technip and SD, and they can take advantage of the high-quality ethylene cracking feedstock produced by Hengli’s 20 million tons per year integrated refining and chemical processing facility. Compared with existing ethylene plants of similar scale at home and abroad, Hengli’s ethylene yield can reach the highest level in the world at 48%, marking a new breakthrough in the history of this industry; this figure far exceeds the conventional ethylene yield of 30%-33%, and it also allows for the savings of up to 1.65 million tons of raw materials per year. Once the project is put into operation, it will be able to **reduce China’s reliance on imports of high-end chemical raw materials such as ethylene glycol and polyolefins**.

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