【Major Equipment in the Chemical Equipment Industry】Key equipment for the 1 million tons/year methanol capacity expansion project from 2018 to 2020: Column Preheater

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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 engage in discussions; let’s cheer for Made in China and support the development of chemical processing equipment! ------------------------------------------------------ On April 28, 2020, the tower preheater, a key piece of equipment for the 1 million tons per year methanol upgrade project carried out by China Fifth Ring Engineering Co., Ltd. in Ordos, Inner Mongolia, manufactured by Wuhan Donghai, was successfully produced. The equipment has a net weight of 154 tons, a diameter of 2200 mm, and a length of 18350 mm. The casing is made of 14Cr1MoR+S32168 composite steel plate, while the heat exchange tubes are made of S30408. This device features a pressure-difference design, has a complex structure, and represents a combination of heat exchangers and tower equipment. Heat exchange between the syngas in the shell side and the reaction gas in the tube side; the upper and lower spherical end caps are clad with electrode layers, and the upper end cap, tube sheet, and shell-side cylinder are welded together ； The equipment features high design parameters: the design pressure is 9.95 MPa, the design temperature is 275°C, and the design pressure difference between the tube side and shell side is 0.7 MPa. The processes of cutting, rolling, and assembly require strict control; when the length of the tube bundle exceeds 12 meters, special tools and manufacturing techniques are needed for threading the tubes and carrying out the assembly. After fabrication, a gradual increase in pressure is applied to ensure that the required design pressure difference is met.