【In-depth Discussion on Modular Installation of HaiChuan】Installation of modular steel structure equipment for 107-meter degassing tanks

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At the 450,000 tons per year LLDPE production facility of Liaoning Baolai Chemical Co., Ltd., which is part of the Light Hydrocarbons Comprehensive Utilization Project operated by the Sixth Branch of Thirteenth Construction Company, the final module (the fourth module) of the 107-meter-high degassing tank’s steel framework was successfully assembled upon the signal given by the chief crane operator. The completion of the installation of this fourth module marked the end of all large-scale lifting operations in the entire PE production area. From planning and deployment to assembly and lifting installation, the entire construction process witnessed the hard work and dedication of the Baolai project team, as well as all the management staff and workers involved. It also reflected the diligent work ethic of the employees from Thirteen Construction Group, who worked tirelessly despite the scorching summer heat. The total weight of the steel structure for the degassing chamber is 1,170 tons, while the weight of the equipment in this chamber is 320 tons. The installation height of the steel structure ranges from 32.6 meters to 107 meters. The framework is designed as a super-high-rise steel structure; all the steel columns are made of welded cross-shaped members. The weight of each main column alone reaches 27 tons. For this reason, the project team decided to prefabricate the steel structure in a factory and then transport it to the construction site for assembly. Throughout the construction process, the hazardous factors and operational risks were kept under control. Many difficulties and problems arose during construction, such as the installation of the weighing modules, the extremely high lifting heights required when moving equipment through the steel structure framework, and the large dimensions of the framework itself ； Continuous rainy weather, delayed supply of materials, and various other constraints. To ensure quality and schedule, the project team carries out timely deployment and coordination. Regarding the work, a two-shift system is implemented throughout the welding process to ensure continuous welding 24 hours a day. From a technical standpoint, the project team organized multiple specialized discussions and evaluations in the form of thematic meetings to ensure the feasibility and safety of lifting and installation. This series of efforts demonstrated the cohesion of the team at the Sixth Branch and their spirit of working together diligently, ensuring the successful completion of the heavy-lifting operations for the PE equipment.