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尿素框架是尿素装置最高的结构物,总高75米,30.5米以下为现浇钢筋混凝土结构,30.5米以上为焊接钢结构,钢结构截面尺寸6×6米,高44.5米,总重80多吨。垂直度设计要求允许误差±15毫米。框架紧挨着造粒塔,是为吊装尿素合成塔、高压换热器和支承其他几台工艺设备用的。钢结构的安装要在造粒塔主体土建施工基本完成后,设备安装前进行,施工工期紧。而国外提供的是高空单根拼装的方案,只能搭好脚手架,由下而上,一根一根地安装,这样施工需要四个月时间。我们发动群众、群策群力、成
The urea frame is the highest structure of the urea plant, with a total height of 75 meters, 30.5 meters below the cast-in-place reinforced concrete structure, 30.5 meters above the welded steel structure, the steel structure section size 6 x 6 meters, height 44.5 meters, total weight more than 80 Ton. The verticality design requires an allowable error of ±15 mm. The frame is next to the prilling tower and is used for hoisting urea synthesis towers, high pressure heat exchangers and supporting several other process equipment. The installation of the steel structure shall be carried out after the completion of the civil construction of the main body of the prilling tower and before the installation of the equipment. The construction period shall be tight. In contrast, foreign countries provide a single high-altitude assembly program that can only be scaffolded and installed from bottom to top, one by one. It takes four months for the construction to take place. We mobilize the masses, work together, and develop