【Haichuan Project Updates】Ethylene tower for ethylene production from ethane at Lanzhou Petrochemical Yulin installed
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On July 3, the third section of the ethylene column in the ethylene production unit of Lanzhou Petrochemical’s Yulin ethane-to-ethylene project was successfully installed, with a weight of 127 tons. The installation of this \"tallest tower\" – which weighs 523 tons and is 76 meters high – marks a significant advancement in the installation of large-scale equipment for this project. The ethylene column is the core reactor in the ethylene production facility of ethane-to-ethylene projects. Its main function is to transfer the light components from the liquid phase of ethylene to the gas phase, and to transfer the heavy components from the gas phase to the liquid phase, thereby achieving separation and improving the purity of ethylene. With a total weight of 523 tons and a height of 76 meters, it was lifted in 3 sections and is the tallest tower in the ethylene plant. Liujian Company, which is part of CNPC Global and acts as the general contractor, has been increasing the degree of prefabrication. After completing the installation of the first section by the end of May, it succeeded in installing the second and third sections within just over 30 days. The successful installation of the ethylene tower marks an acceleration in the modular construction process for the equipment in the ethane-to-ethylene project, laying the foundation for subsequent modular construction. Facing the challenges of being located far from its headquarters, as well as poor operating conditions and high construction difficulties, Yulin Chemical Co., Ltd. adheres to the overall goal of \"using the most advanced technologies to achieve maximum efficiency.\" It implements the requirements of \"five modernizations\" – standardized design, modular manufacturing, factory-based prefabrication, mechanized operations, and information-based management – focuses on \"five key areas of control,\" pays close attention to the scheduled milestones, improves plans, reverses the timeline for tasks, and assigns responsibilities to ensure that the project remains fully under control. A series of labor competitions were organized to boost the enthusiasm of the construction workers; over 4,500 workers on site worked with great determination, working together to overcome difficulties and creating a surge in construction activity. As a result, some facilities such as the liquefied gas and light hydrocarbon storage areas as well as the vehicle loading/unloading stations were put into use ahead of schedule. Out of the 43 individual projects, 40 have already begun construction. At present, the builders are going all out to meet the challenge of this \"severe winter,\" and through their hard work and dedication, they are striving to ensure that this **model project for high-quality development, a strategic project for the group company’s transformation and upgrading, a project aimed at strengthening Lanzhou Petrochemical’s capabilities, and a project to support the economic development of rural areas** is completed and put into operation at a high quality as soon as possible.
Global Sixth Construction’s modular construction methods aid in the development of key infrastructure projects. 2020/07/13 Source: China Petroleum News, China Petroleum Network. (Special correspondent: Xu Bing; Correspondent: Ma Binkē) On July 7, the first module of the convection section of Unit 4 of the ethylene cracking furnace in the Tarim ethane-to-ethylene project, constructed by Global Sixth Construction, was lifted into place. Modular construction boosts the quality and efficiency of **key demonstration projects thanks to its fast turnaround time and high productivity. Liu Jian Company is accelerating the implementation of the \"five modernizations\" approach in its on-site construction projects. Standardized prefabrication factories are set up at the construction sites, where pipe welding is carried out through prefabrication in factory conditions; this results in a welding efficiency that is more than three times higher compared to manual welding. At the same time, modular construction is vigorously promoted; while the modules are prefabricated and transported, the prefabrication and installation of the ground steel structure are carried out as well, doubling the construction efficiency. The ethylene cracking furnaces in the Tarim ethane-to-ethylene project total 5 units, with each furnace consisting of 7 convection section modules. Through scientific planning and lean management, Liujian Company completed the installation of the frames for the transition sections of 5 boilers by June 15, laying a solid foundation for the subsequent installation of the convection section modules. Affected by the COVID-19 pandemic and poor road transportation conditions, the delivery time of the modules was delayed by 20 days compared to the original plan, putting significant pressure on on-site construction. To avoid disrupting the normal progress of subsequent construction tasks, Liu Jian Company quickly adjusted its construction plan. At the same time, it took advantage of this time to accelerate the prefabrication of the steel structures, cleared out several unloading areas, and prepared parking spaces that met the lifting requirements for the 3 modules arriving simultaneously. To ensure even stress distribution on the steel cables, minimize the effects of deformation, and guarantee the quality of module installation, before the actual lifting, Liu Jian Company conducted trial lifts to check the connection between the balance beam and the modules, thereby identifying any potential issues in a timely manner. During the period when the convection section modules were delayed in arrival, Liu Jian Company focused on accelerating the prefabrication of the convection section framework, completing 40% of the ground assembly for the outer frames of the 12 modules in 3 furnaces, thus preparing in advance for the advancement of the convection section installation work.
Both Tarim Ethylene and Yulin Ethylene are under construction by Huanqiu Sixth Construction