Rapid replacement method for fixed section flue of large converter
A replacement method and technology for large-scale converters, which are applied in the directions of manufacturing converters, improving process efficiency, and improving energy efficiency, can solve the problems of reduced construction efficiency, low construction efficiency, inconvenient installation and operation, etc., so as to reduce potential safety hazards and shorten construction. time, the effect of reducing the demolition process
Pending Publication Date: 2022-03-25
SHANGHAI BAOYE GRP CORP
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Problems solved by technology
[0003] In order to realize the rapid and efficient dismantling of the flue in the movable section, CN 201210111947.0 discloses a hoisting method for overhauling and dismantling the flue in the movable section of the furnace mouth. The removal and maintenance of the flue in the movable section of the furnace mouth is completed on the premise of the upper part of the flue, but it is only suitable for the replacement and removal of the flue in the movable section of the furnace mouth, and cannot meet the replacement and removal of the flue in the fixed section
CN 201810781788.2 discloses a post-use maintenance and partial replacement process for the vaporization flue of a large-scale converter waste heat boiler. Specifically, it is to make the flue sub-section, remove the fatigue leakage part of the original flue, and install the flue sub-section on site. The overall operation is relatively complicated , the installation and operation are inconvenient, the construction efficiency is low, and there is a large room for improvement
[0004] The above technologies cannot achieve efficient replacement of the fixed-section flue, and the current fixed-section flue replacement has the following inconveniences: (1) It is necessary to remove the fully enclosed top panel of the converter, which cannot avoid the formation of marginal holes around the fixed-section flue, and the operation When personnel perform replacement operations, there is a risk of falling from a high place, which poses a great safety hazard. (2) The process of removing the fully enclosed top panel of the converter increases the construction time and reduces the construction efficiency
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Embodiment 1
[0044] A method for quickly replacing the flue in a fixed section of a large-scale converter, which specifically includes the following steps:
[0045] Step 1: Preparations
[0046] 1.1 Before the converter is shut down, make a temporary construction platform (such as figure 1 and 2 As shown), the temporary construction platform 9 is a regular octagon, including platform panel 1 (with pattern on the top) and platform outrigger 2 (made of I-beam, whose length is confirmed according to the size of the converter support ring to the furnace mouth), the platform panel A plurality of platform outriggers 2 perpendicular to the platform panel 1 are welded below the platform panel 1, channel steel clad beams are provided on the outer edge of the platform panel 1, and a fence 3 is also provided on the outer edge of the upper side of the platform panel 1 to ensure construction safety;
[0047] 1.2 Before the converter is shut down, according to the size of the flue in the fixed section...
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The invention discloses a method for quickly replacing a fixed-section flue of a large converter, which comprises the following steps of: cooling and disassembling the converter after the converter is shut down, removing a movable-section flue, and disassembling a movable flue; straightening the converter, and mounting the temporary construction platform on the converter backing ring; a flue jacking device is installed on the lower side of the fixed section flue to be replaced; after connecting pieces and accessories of the to-be-replaced fixed-section flue are detached, the to-be-replaced fixed-section flue is jacked to the position above a totally-closed top panel of the converter, and the to-be-replaced fixed-section flue is lifted away; the fixed section flue for replacement is hoisted to the movable flue hydraulic lifting device and clamped and fixed with an annular clamp groove in the movable flue hydraulic lifting device; descending the fixed section flue for replacement to a mounting position; the flue jacking device and the temporary construction platform are dismantled; and reassembling. According to the method, the fixed-section flue is replaced by utilizing the original movable flue hydraulic lifting device, a totally-closed top panel of the converter does not need to be dismantled, potential safety hazards are few, and the construction efficiency is high.
Description
technical field [0001] The invention relates to the technical field of metallurgical equipment maintenance, and relates to a method for quickly replacing a flue in a fixed section of a large-scale converter, in particular to a method for replacing the flue in a fixed section of a large-scale converter that can greatly improve the efficiency of replacing the flue in the fixed section of the converter and the safety of the construction process method. Background technique [0002] In recent years, for the convenience of follow-up maintenance, the large-scale converter vaporization cooling flue has decomposed the traditional furnace mouth fixed section flue into a fixed section flue and a movable section flue. It is easy to replace the flue. You only need to remove the movable section of the flue to perform the replacement operation, which reduces the two processes of dismantling the smoke door in front of the furnace and removing the beam of the smoke door in front of the furn...
Claims
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IPC IPC(8): C21C5/40
CPCC21C5/40Y02P10/25
Inventor 蒋林钢张建模柳建龙秦保仁
Owner SHANGHAI BAOYE GRP CORP