Upside-down method of lifting device and variable-diameter absorption tower

Abstract

The invention discloses a lifting device used for lifting a large cylinder during inverted installing of an absorption tower. The lifting device comprises a hydraulic lifting round frame, an expansion ring attached to the inner wall of the cylinder, and door-shaped steel clamps used for fixing the expansion ring. The door-shaped steel clamps are buckled on the expansion ring and welded and fixed to the inner wall of the cylinder. The hydraulic lifting round frame comprises hydraulic lifting frames evenly arranged on the inner side of the cylinder along the circumference, a center steel pipe arranged in the center position of the cylinder, circumferential box iron sequentially connected with the hydraulic lifting frames, and radial box iron used for connecting the center steel pipe with the hydraulic lifting frames. The hydraulic lifting frames and the center steel pipe are all welded and fixed to a bottom plate. Each hydraulic lifting frame comprises a support, an oil cylinder arranged over the support, a lifting rod, an upper clamping head arranged over the oil cylinder and used for driving the lifting rod to move upwards, a lower clamping head arranged between the support and the oil cylinder and used for limiting downward sliding of the lifting rod, and a sliding pull block capable of sliding along the support. According to an inverted installing method for the reducing absorption tower, the installing procedures of the absorption tower are simplified, and the installing quality of the absorption tower is improved.

Description

technical field [0001] The invention relates to a lifting device used for the installation of a desulfurization absorption tower. The invention also relates to an upside-down method of the variable-diameter absorption tower. Background technique [0002] In recent years, large-scale supercritical units and above have gradually become the main units of thermal power plants. According to the relevant regulations of the country on energy conservation, emission reduction and environmental protection: the design, construction and operation of boiler flue gas desulfurization systems in thermal power plants must be carried out at the same time run. [0003] Limestone-gypsum wet desulfurization process is generally used for boiler flue gas desulfurization, and the flue gas desulfurization absorption tower is one of the important equipment for this process. Due to the characteristics of large volume, wide inner diameter and heavy weight, the absorption tower needs to be combined an...

AI Technical Summary

Problems solved by technology

The installation methods of the absorption tower include: frontal installation method and inverted installation method. The frontal installation method is assembled with one or two truck cranes, and the installation starts from the first layer and goes up layer by layer; Assemble downwards layer by layer. Both the front-mounting method and the traditional flip-chip method have the disadvantages of slow progress, large investment of manpower, and difficulty in controlling the installation accuracy and welding quality. The installation process of the variable-diameter absorption tower is more complicated and Installation quality is more difficult to control

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