【In-depth Discussion on Modular Installation of HaiChuan】Segmental Lifting of the Wash Tower in Gulei Refining & Chemical’s 2,400-ton EO/EG Plant
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On April 23, 2020, the wash tower (1060-C-115) of the EO/EG unit in the Gulei Refining and Chemical Integration Project, constructed by Nanjing Engineering Company, was successfully lifted into place with the assistance of a 4,000-ton crawler crane for main lifting and a 1,250-ton crawler crane for assisting the lift. The successful completion of the wash tower’s construction marked the successful finish of the key phases of the EO/EG unit’s installation work, creating favorable conditions for the subsequent construction tasks on this unit; it represents an important milestone.
As early as the afternoon of March 18, the lower section of wash tower C-115, part of the Gulei refining and chemical integration project’s facility with an annual production capacity of 100,000/700,000 tons of ethylene oxide/ethylene glycol (EO/EG), was successfully delivered to the project site. It became the first large-scale equipment of over 1,000 tons to arrive at the site since work resumed on the project, and it is also the largest of its kind in the world. It is understood that the equipment has a diameter of 9.1 meters, a length of 102.5 meters, and a total weight of 2,120 tons; its extremely large diameter and high weight make it the largest of its kind among washing towers used in similar processes worldwide. Due to the extreme difficulty of lifting the entire tower, it is divided into upper and lower sections at the time of manufacture for loading.
The C-115 tower is the \"largest\" washing tower in the world; it is the largest and heaviest equipment among all the units in the Guli Refining and Chemical Integration Project. It is also the largest equipment in the EOEG unit in terms of arrival time, the heaviest one in terms of lifting weight, the tallest among tower-type equipment, and the most challenging to construct； The total weight of the equipment exceeds 2,400 tons (including pipelines attached to the tower, ladder platforms, etc.), and it is lifted in two sections, upper and lower.
The lower section weighs about 1,400 tons, while the upper section has a lifting weight of around 1,000 tons； The tower is 102.3 meters tall, with a cylinder diameter (inner diameter) of 9.1 meters and a maximum wall thickness of 86+3 mm ； It is lifted in two sections; the lower section is 55.67 meters long, and the upper section is 46.63 meters long ； To reduce work at heights and lower safety risks, pipeline installations attached to the towers as well as ladder platforms are assembled on the ground, and anti-corrosion and insulation measures are applied; in this way, the tower equipment is equipped with protective coverings, ensuring that lights are on once the towers are erected. This represents the first application of such methods for the pipeline installations attached to the 17 modularly installed tower devices in the EO/EG plants.
To reduce work at heights and lower safety risks, pipeline installations attached to the towers as well as ladder platforms are assembled on the ground, and anti-corrosion and insulation measures are applied; in this way, the tower equipment is equipped with protective coverings, ensuring that lights are on once the towers are erected. This represents the first application of such methods for the pipeline installations attached to the 17 modularly installed tower devices in the EO/EG plants. The lower section of this equipment was lifted and installed in place on April 8. Now is the time for lifting the upper section of the equipment, that is, lifting it to complete its construction. After the upper and lower sections are joined together, the EO/EG unit with \"one center (the wash tower) and two key points (the two reactors)\") is successfully completed.