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FPSO发电机组模块吊装方案

2017-03-18钟伟怀

广东造船 2016年6期

钟伟怀

摘 要:发电机组是FPSO最重要的模块之一,发电机组模块由钢结构及设备构成,重量约500 t,需通过专用吊梁才能吊装。船东对模块安装精度及吊装安全措施要求严格,模块支座有多根支撑,且FPSO型深很大,水面以上高度达到23 m,模块底部距离吊钩68m,安装支座高度约5m,吊装间隙约1m,总体安装高度达到97m,对模块吊放到位及浮吊的要求极高。

关键词:FPSO;模块;吊装

中图分类号:671.4 文献标识码:A

Abstract: The generator set module is one of the most important module of FPSO, it is composed of steel structural members and equipment with total weight is about 500 tons and will be lifted by a special lifting beam. The ship owner has stringent requirements for the installation accuracy and safety control of the module, there are much supports for the module foundation, FPSOs mould depth is large, the FPSOs side shell is about 23 m above water, the space between the bottom of the module and the hook of the crane is about 68 m, the foundation height is about 5 m and the lifting space is only 1m and the total lifting height reaches 97 m, therefore the lifting work of the module is very hard.

Key words: FPSO; Module; Lifting

1 概述

1.1 模块主要参数

模块长×宽×高=25.5×26.5×26.2 m,重量约500 t,安装在FPSO甲板上#64-#68之间,如图1所示。模块采用“长大海升”3 200 t起重船进行吊装,由于吊装水域距码头直线距离400 m范围存在大量浅滩,码头停泊大量船舶,对拖轮拖带技术水平要求极高,途中穿过繁忙航线,需各相关船舶密切配合,且需对过往船只发布航行通告,因此吊装发电机组模块难度相当大。

1.2 3 200 t起重船主要参数

船长L 110 m;

型宽B 48 m;

型深D 8.4 m;

设计吃水(空载)T 4.8 m;

结构吃水(满载)T 6.0 m;

1.3 3 200 t起重机载荷曲线

见图2。

2 吊装组模块方案

2.1 吊装工艺流程

起重船抵达船厂码头(模块吊装准备工作就绪)→起重船组装吊梁及挂好钢丝吊梁、钢丝进行试吊→起重船起吊发电机模块→ 移动起重船到指定位置→起重船布锚及带好缆绳(锚艇配合)→发电机模块吊装上船固定→起重船松钩移动→起重船到码头卸吊梁→起重船离厂。

2.2 吊装前准备工作

(1)在FPSO右舷外板68#、86#耳板预先连接6 m左右的尼龙缆,尾部主甲板上带缆桩预先挂好长度约25 m钢丝缆供起重船移船绞车连接;

(2)FPSO与岸上带缆桩固定牢靠,防止吊装过程中发生小幅度晃动引起模块意外摇摆发生危险,船上容易滑动的物体应在吊装前固定牢靠;……

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