Four-tube conjoint chimney

Abstract

The invention discloses a four-tube conjoint chimney comprising four round-section reinforced concrete cylinders and reinforced concrete connecting beams. The round-section reinforced concrete cylinders are arranged at four apexes of a square; each two adjacent cylinders are connected through the reinforced concrete connecting beams in the height-wise direction. The four-tube conjoint chimney has the advantages that a steel inner cylinder is omitted so that building cost of the whole chimney structure is greatly lowered; the chimney is integrated and centrally arranged, the floor area is decreased as compared with that of the independent chimney, the cylinders are connected in a whole through the reinforced concrete connecting beams, the whole structure has uniform flexural rigidities in all directions and is evenly stressed in all directions, the whole structure is reasonable, and lateral displacement of the whole structure can be decreased by the use of the connecting beams; the wall thickness and size of the cylinders gradually increase from top to bottom in the height-wise direction of the chimney, sectional rigidity of the chimney gradually also increases from top to bottom, and stress is reasonable; a ladder between each two cylinders is safer and more reliable than the steel ladder in the traditional many-tube chimney with the steel inner cylinder, and using is more facilitated; by the use of the four-tube conjoint chimney which is continuously cast, the problem that a chimney connector of the steel inner cylinder expands is avoided.

Description

technical field [0001] The invention belongs to the technical field of power plant chimneys, and in particular relates to a four-pipe conjoined chimney formed by connecting four reinforced concrete cylindrical bodies 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...

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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