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1 前言为了适应生产装置规模不断扩大和生产工艺指标日趋提高的要求,塔器正向大型化发展。由于受运输条件、现场吊装能力和现场施工环境等因素的限制,对于大型塔器一般采用分段供货、现场分段组焊的安装方法。由于现场组焊施工条件差,并且大多为空中组对,塔器的直线度控制是现场组焊施工的难点之一。因为塔器的直线度将直接影响塔内件的整体水平度,进而影响气-液传质效率及塔操作的稳定性,直线度严重超标时还会危急塔器的安全
1 Introduction In order to adapt to the continuous expansion of production scale and the increasing demand of production process indicators, tower is large-scale development. Due to transportation conditions, on-site lifting capacity and on-site construction environment and other factors, for large tower generally used sub-supply, field sub-group welding installation method. Due to the poor construction site welding conditions, and mostly for the air group, the tower straightness control is one of the difficulties of spot welding construction. Because the tower’s straightness will directly affect the overall level of tower parts, thus affecting the gas-liquid mass transfer efficiency and the stability of the tower operation, the seriousness of overweight standard will be critical safety tower