【Major Industrial Equipment in the Chemical Industry】217 – The demethanization tower, pre-demethanization tower, and C3 washing tower of the Gulei Refining and Chemical Plant, manufactured in Tianjin
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Red May for chemical industry workers! Reply reward! ---------------------------------------------- The past decade has been a period of rapid development in China’s chemical industry, marked by the emergence of many new processes, products, and equipment. There has also been significant progress in China’s chemical processing equipment, which has contributed to the swift advancement of the petrochemical sector. Here, we have compiled some of the achievements and breakthroughs made by Chinese equipment manufacturers in terms of larger-scale production and increased use of domestic equipment. We invite everyone to share their insights and engage in discussions, to cheer for Made in China and to support the development of chemical processing equipment! ========================== The demethanization tower, pre-demethanization tower, and C3 washing tower for the ethylene unit of the Zhangzhou Gulei petrochemical integration project were constructed in June 2020 by SEI Sinopec Engineering Co., Ltd.; Hanyang Heavy Industry Equipment Manufacturing (Tianjin) Co., Ltd. was responsible for the implementation of the construction work, while Tianjin Lingang Port Group Co., Ltd. handled the transportation. These units were delivered to the Dagukou port area within the Tianjin Port Free Trade Zone, where they were successfully loaded onto a ship at berth No. 18. The demethanizer, pre-demethanizer, and C3 scrubber – these three key units being transported – are essential equipment for the downstream processing facilities for million-ton-scale ethylene production in Fujian Gulei’s integrated refining and chemical project. Among them, the demethanization tower has a maximum diameter of 3.9 meters, a maximum length of 59.3 meters, and a transport weight of 390 tons ； The pre-methanation tower has a maximum diameter of 5 meters, a maximum length of 58.3 meters, and a transport weight of 539 tons ； The carbon tri-washing tower has a maximum diameter of 3.2 meters, a maximum length of 26.4 meters, and a transport weight of 144 tons.
There are still units in Tianjin capable of carrying out such a major task – let’s give them a thumbs up
The operating pressure at the top of the ethylene distillation column is 0.61 MPaG, the temperature in the reactor vessel is approximately -39°C, and the temperature at the top of the column is about -61.7°C. The bottom of the tower can require an ethylene level of ≤0.5 mol% (1 mol% in the simulation program), while the ethylene level at the top of the tower should be ≥99.97 mol% (for ethylene towers and ethylene pump heat pumps); the yield of ethylene is at a world-class level. The ethylene distillation tower has a maximum inner diameter of 6,000 millimeters. It is constructed from austenitic stainless steel S30408, with a wall thickness of 42 millimeters. Its total length is approximately 89.5 meters, and its weight is 830 tons; it is the largest tower equipment in China to be manufactured using stainless steel. The tower is designed for low temperatures and operates under harsh conditions, making equipment manufacturing very difficult.