【Major Chemical Equipment in China】The 1,200-ton main purification unit of the Wulan Coal Chemical Project in Xingan League, built between 2014 and 2017 – China’s largest low-temperature methanol washing absorption tower

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It’s tough in the scorching summer heat! Keep up with heat prevention and cooling! Clarify the key tasks! Safety analysis must not be neglected! ---------------------------------------------- The past decade has been a period of rapid development in China’s chemical industry, with the emergence of many new processes, products, and equipment. China’s chemical processing equipment has also seen significant progress, 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 greater use of domestic equipment. We invite everyone to share their insights and discuss these topics together; let’s cheer for Made in China and support the development of chemical processing equipment! ------------------------------------------------------ At 7:00 a.m. on October 25, 2017, the low-temperature methanol wash absorption tower, a key piece of equipment in the purification system of Ulan Coal Chemical Project’s 1.35 million tons per year synthetic ammonia/2.4 million tons per year urea production facility, was slowly lifted with the assistance of several large cranes. The lifting is carried out using a 2,500-ton gantry hydraulic lifting system as the main lift device, along with a 650-ton crawler crane to assist in lifting the structure as a whole; an additional 400-ton crawler crane and a truck crane are used to support this process. The main lifting mechanism consists of four 650-ton hydraulic jacks, two main power units, and a control system. A total of 144 steel strands are used in this setup. Through the intense and orderly coordination and command by dozens of people on site over nearly 11 hours, the absorption tower was successfully installed in place. The methanol wash absorption tower is the core equipment of the purification system. It has a height of 88.56 meters, a diameter of 4.5 meters, and a wall thickness of 12 cm; its total weight is 1,200 tons. Its main function is to remove impurities such as hydrogen sulfide, carbon dioxide, and inert gases from the mixed gas. The main working principle of the low-temperature methanol wash absorption tower is to spray low-temperature methanol from the top of the tower downward, while feeding the shift gas upward from the bottom. Under a pressure of approximately 55 standard atmospheres, a series of physical absorption and dissolution processes take place, which enable the gradual removal of acidic gases such as hydrogen sulfide and carbon dioxide from the syngas, resulting in purified gas that meets the required standards. This absorption tower is capable of processing 380,000 cubic meters of shift gas at standard atmospheric pressure per hour. It is the largest single unit in Ulan Group’s coal chemical project in Xingan League, and it is also the largest low-temperature methanol washing absorption tower in China at present. The completion of this facility marks another significant advancement in the coal chemical project in Xingan League, laying a solid foundation for the early commencement of trial operations and full production of the project.