[Haichuan Modularization] Precise lifting of skid-mounted interdisciplinary integrated units completed for Lanzhou’s clean and intelligent heat source project

Thread Content

Recently, the precise lifting of the skid-mounted, interdisciplinary integrated unit for the Hehai New Energy Lanzhou Clean and Smart Heat Source project carried out by the Guangdong branch of China National Chemical Engineering Corporation’s 13th Construction Company was completed, marking a transition in this project’s construction approach from civil engineering to equipment integration, and bringing modular intelligence to the “Lanzhou Blue” community heat supply project. The skid-mounted unit is 16.5 meters long and 3 meters high, integrating six core heating systems. Over a period of 45 hours, the work on site involved welding two weldable pipes for flue gas waste heat recovery, two seamless pipes for unit extraction steam, as well as four pipes of medium and small diameter. At the same time, frame welding was carried out, and 66-meter-long galvanized cable trays were pre-assembled; compatibility with surrounding equipment was verified through 3D scanning, enabling a construction approach of \"prefabrication on the ground and installation in the air\". During the lifting process, the 100-ton truck crane used precise operations over a period of 5 hours to successfully place the 15-ton prefabricated cross-disciplinary integrated unit, which was prepared on the site ground, at axis 0-1 of the deaeration coal bin room. To overcome the challenge of having a work area of only 50 square meters, located right next to the boiler frame and the heat pump room, the project team employed a \"ground-to-air\" transfer method, enabling a 90-degree adjustment of the unit in the air within 17 minutes, with a positioning error of ≤30 millimeters. This approach reduced on-site operations by 60% compared to traditional methods of lifting individual components, saved 40% of the construction time, and effectively minimized the risks associated with construction in winter conditions.