【Major Industrial Equipment in the Chemical Industry】485-2020: DMC Separation Tower with 4800mm Diameter Composite Plates

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In September 2020, the first oversized piece of equipment for the 1.8 million tons per year ethylene glycol production project of Shaanxi Coal Group Yulin Chemical Co., Ltd., which was manufactured by Xinhe Company, namely the DMC separation tower (equipment code 20M017), was officially delivered to the client after 120 days of continuous efforts by the workers on site. The DMC separation tower is filled with process gas/methanol solution, which is a medium-flammability medium. The equipment is constructed from composite panels, and it is essential to carefully protect the inner stainless steel lining during manufacturing; otherwise, the medium contained within will corrode the tank body of the equipment, leading to leakage incidents. At the same time, the equipment has a large diameter (φ=4800mm) and a wall thickness of the cylinder that varies (δ=(3+14)mm). To address these technical challenges, the project team planned ahead, made thorough arrangements, and carefully developed the product manufacturing process. A large number of manufacturing tools were prepared based on the product’s structure. During production, the on-site staff worked hard to overcome extreme weather conditions such as sandstorms and continuous rain, adjusted the production schedule accordingly, and worked overtime to keep up with the timeline, ensuring that the equipment was manufactured successfully.