An installation method of a thermal power plant wet chimney with a flame-retardant and anti-corrosion glass-steel structure

Abstract

Disclosed is a mounting method for a thermal power plant wet chimney with a flame retardant anti-corrosion glass fiber reinforced plastic structure. The mounting method is characterized by including the steps of 1), calculating, designing and determining structural parameters of parts of the wet chimney; 2), manufacturing a glass fiber reinforced plastic lining in segmentation; 3), independently mounting the chimney with the glass fiber reinforced plastic lining in segmentation in a reinforced-concrete external barrel or a steel-structured support frame, setting connecting and supporting nodes at positions of designed supporting nodes, and configuring non-metallic expansion joints at the upper end of each supporting node; setting and connecting shake stopping points at positions according to the designed shake stopping points. The wet chimney with the glass fiber reinforced plastic lining and the mounting method are major technical innovation in anti-corrosion engineering of the wet chimney. The puzzling problem about leakage corrosion during the anti-corrosion engineering of the wet chimney is solved, which is the major technical innovation of the anti-corrosion engineering of the wet chimney and the next-step smoke extraction technology development direction of thermal power plants.

Description

technical field [0001] The invention relates to a wet chimney of a thermal power plant, in particular to an installation method of a fire-resistant and anti-corrosion wet chimney. Background technique [0002] High chimneys (generally 180-270 meters in height) of thermal power plants are important structures. According to relevant regulations, they should meet the requirements of the structural design base period of 50 years and the process system design life of 30-35 years. At present, the problem of corrosion and leakage of wet chimneys in domestic thermal power plants is serious. Due to the quality of chimney anticorrosion materials, construction process control, project management, and variable operating conditions, a large number of desulfurization chimneys have been damaged and leaked to varying degrees. In 2009, the China Electric Power Planning and Design Institute conducted a survey of 226 chimneys that had undergone desulfurization transformation, including six ca...

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Problems solved by technology

[0004] At home and abroad, FRP is widely used in anti-corrosion equipment and projects such as chemical industry, metallurgy, shipbuilding and aerospace. However, how to apply FRP to ultra-high chimneys in the power industry is currently being tested and explored everywhere. There are no mature technical reports on the fixed installation of the FRP lining of the wet chimney, and the overall product design, material selection, structural design of each part, connection structure, and lifting installation of the FRP flue.

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