Three-pipe conjoint chimney

Abstract

The invention discloses a three-pipe conjoint chimney comprising three round-section reinforced concrete cylinders and reinforced concrete connecting beams. The round-section reinforced concrete cylinders are arranged at three apexes of an equilateral triangle; each two cylinders are connected through the reinforced concrete connecting beams arranged in the height-wise direction at certain intervals. A steel inner cylinder is omitted, and building cost of the whole chimney structure is greatly reduced accordingly; the cylinders are connected in a whole through the reinforced concrete connecting beams, flexural rigidities of the whole structure in all directions are uniform, the whole structure is evenly stressed in all directions, and the whole structure is reasonable; the use of the reinforced concrete connecting beams decreases lateral displacement of the structure. The wall thickness of the cylinders gradually increases from top to bottom in the height-wise direction of the chimney, sectional rigidity also gradually increases from top to bottom, and stress is reasonable. A steel ladder between each two cylinders is safer and more reliable than the steel ladder in the traditional multi-pipe chimney with the steel inner cylinder, and using is more facilitated. By the use of the three-pipe conjoint chimney which is continuously cast, the problem that a chimney connector of the steel inner cylinder expands is solved.

Description

technical field [0001] The invention belongs to the technical field of power plant chimneys, and in particular relates to a three-pipe conjoined chimney formed by connecting three reinforced concrete cylinders with circular cross-sections by a reinforced concrete tie beam. Background technique [0002] With the continuous improvement of the country's requirements for flue gas emission standards, new thermal power plants are required to perform flue gas desulfurization treatment. Among the newly built chimneys using wet desulfurization technology, multi-tube steel inner tube chimneys become power plant chimneys A form commonly used in . The multi-pipe steel inner tube chimney can be divided into self-supporting type and hanging type according to the chimney structure. The design of the self-supporting steel inner tube chimney has higher requirements for the interface of the horizontal flue, and the temperature expansion of the horizontal flue will cause the steel inner tube. ...

AI Technical Summary

Problems solved by technology

However, whether it is a chimney with a concrete outer cylinder and a steel inner cylinder or a tower chimney, the steel inner cylinder in the chimney is one of the essential main components. Due to the large amount of steel used in the steel inner cylinder, the cost is very high

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