The demolition phase of 5 used tower units at Jinxi Petrochemical was successfully completed
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On April 21, at Jinxi Petrochemical in Huludao, Liaoning – with the last tall tower being carefully lowered to the ground using the precise control of crane arms – the removal phase of the five most challenging towers, which were reused from existing equipment at Jinxi Petrochemical as part of Fushun Petrochemical’s refinery optimization project for reforming and hydrogenation units, was successfully completed. It is reported that starting from the demolition of the C202 debutanization tower on April 19, within just three days, the lifting team of CPECC First Construction Company successfully lowered four large towers one by one in a safe manner. The lifting operation of the C-102 naphtha distillation tower, carried out on April 21, saw the entire process from lifting to steady lowering completed in merely 45 minutes. The core equipment for this demolition operation, the C-102 naphtha distillation tower, is a true behemoth. The tower has a lifting capacity of 155 tons, a diameter of 4 meters, and a height of 57.7 meters, which is equivalent to nearly 20 floors. Faced with such a \"giant,\" the lifting team employed the proven and reliable single-machine lifting and delivery method used in the industry. The main lifting equipment consists of one ZCC5200S type 400-ton crawler crane, supplemented by one 200-ton truck crane to assist in lifting the tail section. With the coordinated operation of two large machinery units, the entire lifting, turning, and lowering process was carried out smoothly, and the task was completed safely within 45 minutes.
According to the person in charge of the project site, there are two major challenges in this demolition operation: first, the working space is extremely tight. The plant area is densely packed with equipment and filled with pipelines; on one side there are pipe racks awaiting demolition, while on the other side there are units ready to be put into operation. There is very little space available for cranes to rotate or for towers to be tilted. To overcome this challenge, the lifting team carried out continuous and meticulous optimization of the layout in the initial stages; through CAD modeling and actual measurements, they repeatedly evaluated the potential use of every inch of space. By scientifically adjusting the crane’s positioning and carefully planning the direction and path for lowering the tower, the team ensured that subsequent operations could be carried out promptly after the tower was lowered. The platforms, pipelines attached to the tower, and other accessories were removed as soon as possible, thereby saving valuable time and space for subsequent loading and transportation. Second, safety risks are highly concentrated. The tower to be demolished is located adjacent to an aromatic unit that is about to come online. The device is in a critical preparatory stage prior to operation, and any accidental collision, vibration, or even the presence of foreign objects could have irreversible effects on it, thereby delaying the overall project timeline. Therefore, throughout the entire lifting process, the operators must work with precision akin to that of \"surgical procedures\" to ensure everything goes perfectly. To address the aforementioned risk factors, the project team developed a set of comprehensive measures. Before the lifting operation, the technical experts carefully evaluated the feasibility of the lifting plan, used specialized software to simulate the entire lifting process, and developed specific emergency response plans for potential issues such as tail slip and instability, sudden changes in wind conditions, and crane overload. During the lifting process, safety supervisors ensured effective monitoring of key aspects such as the tower’s center of gravity, lifting points, and foundation settlement. The operators and commanders maintained real-time communication via walkie-talkies, striving for precision and smoothness in every movement of lifting, rotating, or lowering the tower. As a result, it was possible to achieve \"zero interference, zero impact, and zero damage\" to the adjacent aromatic compounds processing units. It is reported that following the C-102 naphtha distillation column, the demolition of the remaining three columns (stripper C-101, pentane removal column C201, and butane removal column C202) has also been completed successfully as planned. The total lifting weight of the four tower structures exceeded 400 tons, all of which were lowered in an orderly manner within three days. It is understood that the four towers to be demolished are an important part of Fushun Petrochemical Company’s refinery optimization project for its reforming and hydrogenation units. An important part of this project is to relocate and reuse some of the core equipment from Jinxī Petrochemical’s 1 million tons per year continuous reforming complex. By identifying, repairing, and reusing old equipment, it is possible to significantly reduce the investment costs associated with building new facilities and shorten the construction period; this approach also aligns with the current trends in the petrochemical industry toward green, low-carbon, and circular economic development. With the safe dismantling of the four towers, the subsequent removal of the reverse regeneration framework and the reactor will be carried out in full scale.
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