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一、概述炼油厂装置大检修的时间,受到开、停工的限制,施工是十分紧张的。如何提高工效,确保施工质量,按时开车投产,施工预制深度是一个不容忽视的重要因素。影响检修施工预制深度的因素很多,其中主要因素是施工程序及装置构件的分布密度状况。因此,利用构件之间的有效空间,确定其最大通行能力是检修施工预制深度的一个重要依据。在镇海石化厂常减压装置大检修的减压塔的改造中,由于节能工艺上的需要,减压塔内部构件几乎全部更换。形成了质量要求高、工作量大、工期紧等施工特点。根据这一特点,采用了塔外大深度预制与塔内拆除平行作业
First, an overview of oil refinery installation overhaul time, subject to open, stop the restrictions, construction is very tight. How to improve ergonomics, ensure construction quality, drive on time and put into production, the depth of prefabrication is an important factor that can not be ignored. There are many factors that affect the depth of prefabrication of maintenance work, among which the main factors are the distribution density of construction procedures and equipment components. Therefore, the use of effective space between components, to determine its maximum capacity is an important basis for maintenance of prefabricated depth. In Zhenhai Petrochemical Plant atmospheric and vacuum unit overhaul large decompression tower in the transformation, due to the need of energy-saving technology, vacuum tower almost all the internal components replaced. Formed a high quality requirements, heavy workload, tight construction period and other characteristics. According to this feature, using a large depth prefabricated towers and tower demolition of parallel operations