How to remove a steel chimney

Abstract

The inVention discloses a method for remoVing a steel chimney.The chimney consists of a chimney tube and a tower arranged outside the chimney tube, the tower is mainly composed of seVeral frame unitsconnected from top to bottom, a frame platform is arranged in the frame unit. The remoVing method comprises the following steps of: firstly, diViding the chimney cylinder body from top to bottom intoa plurality of cylinder sections according to the section remoVal height, and judging whether the bottom end position of the cylinder section to be remoVed is greater than the tower height, and determining the remoVal sequence of the frame unit and the cylinder section and the remoVal mode of the cylinder section according to the judgment result; remoVing the section of the cylinder section by means of two ways: a frame body platform and a hanging plate, and then lifting the section or the frame unit to be remoVed after the cutting remoVed by the crane to the ground. The method has the adVantages of simple and easy operation and good controllability, can saVe the cost of assembling and disassembling the chimney, improVe the construction efficiency and ensure the construction safety.

Description

Technical field [0001] The invention relates to the technical field of structure removal, in particular to a method for removing a steel chimney. Background technique [0002] Steel chimneys are widely used in the steel and petrochemical industries. In recent years, due to the large-scale industrial equipment and facilities, the chimneys need to provide greater pumping power, and the flue gas needs to be pumped into the higher air for faster release; Therefore, ultra-high steel chimneys with a height of 100-200m have been rapidly developed and applied in steel plants. Steel chimneys are generally rolled and welded by carbon steel plates to form chimney tube sections, and then the sections are hoisted and overlapped and welded. A steel structure tower is provided outside the chimney tube to protect and stabilize the chimney tube. The top of the chimney is provided with a roof. Cap, platform and navigation mark warning lights, the chimney tube is provided with a steel spiral stair...

AI Technical Summary

Problems solved by technology

[0003] If the steel chimney is used for a long time, it will cause serious corrosion and needs to be dismantled; in addition, due to the change of the production process or the need to build larger industrial equipment and facilities, the original steel chimney can no longer meet the needs of the production process and needs to be dismantled operation, but the existing ultra-high steel chimney removal method has the following defects:

This method requires the use of large crawler cranes, and when the distance between the tower platforms is large, the construction personnel cannot use the tower platforms to gas-cut and segment the chimney tube, and still need to erect and dismantle a large number of scaffold platforms, which is cumbersome and expensive. High and low construction efficiency

[0007] To sum up, the existing steel chimney demolition methods have poor controllability, high risk factor, cumbersome operation, long demolition period, low construction efficiency, and cannot meet the construction needs

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