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In recent years, with the improvement of environmental standards, more and more domestic and industrial boiler flue gas power plants have been desulfurization, denitrification and other processes before discharge into the flue gas temperature is lower, humidity , causing the chimney condensation, corrosion serious, in which case the general design of telescopic chimney, the inner tube using corrosion-resistant materials, the traditional single-tube with brick masonry chimney and the chimney is not applicable to such inner cylinder has unit's flue gas emissions, and thus, most of the chimney design using steel inner cylinder, so the inner tube steel chimney installation except tube construction has become another key step outside. From the 1980s, there are many units in the study of foreign steel inner cylinder chimney installation process. China from the 1990s onwards, with steel inner cylinder widely used in the country, many construction units, research institutes are studying the inner tube steel chimney installation process as well as construction equipment. Current domestic steel inner cylinder chimney installation, there are three main methods: pneumatic jacking method, hydraulic lifting method, hoist lifting scheme. For specific projects, the use of which the most suitable installation process actual site conditions, and sometimes opinions are not uniform. In the basic scenario is determined, in the details of the implementation of many units varies considerably, the safety of the construction process access to a larger degree, some projects will therefore cause an accident. Author twenty years has been engaged in the construction of thermal power plant of the building structure, involved in organizing dozens of chimney construction technology management, this paper based on a large number of construction process firsthand, installation of steel inner cylinder pressure jacking method , hydraulic lifting method, hoist technology to enhance the process of these three principles, improve system design, processing, installation, commissioning, specific implementation process, demolition equipment, safety measures and other aspects made a more detailed description and analysis. Three processes from the scope, cost, and platform for the outer cylinder chimney effect, reliability, safety, schedule, quality control, and many other key technical points, made a comprehensive comparison. Particular the application of the basic theory of reliability from the human, machine, material, method, environmental impact of construction on five aspects of reliability, safety of the main factors is analyzed in detail, so that the process of implementation of the program how to improve reliability in order to ensure the safety of the construction. In this paper, three kinds of processes carried out a detailed description of clear, many of the elements from the construction site, with high practicality, for similar projects in the program selection and optimization and construction organization and management has some reference value.
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