【In-depth Discussion on Modular Installation of HaiChuan】Construction Example – Hazard Rectification Project for the Second Vacuum Distillation Unit at Qilu Petrochemical Refinery
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The safety hazard remediation project for the second atmospheric and vacuum distillation unit at Qilu Petrochemical Refinery is a key task during this spring maintenance campaign; it features a tight schedule and high difficulty. To shorten the construction period, the contractor, Shandong Qilu Petrochemical Construction Co., Ltd., adopted modular installation for the framework structure for the first time.
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The prefabricated frames for this modular installation are divided into three modules, weighing 62 tons, 130 tons, and 150 tons respectively. On March 8, the old heat exchanger area began to be demolished. On the evening of March 17, the first lift of the framework began. On Saturday morning, March 18th, the second lift of the framework began.
This frame is 21 meters high, 12 meters long, and 8 meters wide, weighing 130 tons; it was the most challenging piece to lift in this operation. The lifting operation radius is 18 meters, while the positioning operation radius is 36 meters. The 650-ton crawler crane lifted the load while empty; after adjusting its orientation, a 200-ton super counterweight was attached and the crane moved on the ground for about 12 meters.
Compared to it, on-site prefabrication and welding are much faster
The issue in this case is the lack of space on site, as well as the short amount of time available for use
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