Large-span flue and construction method thereof

Abstract

The invention relates to the technical field of flue support, and discloses a large-span flue and a construction method thereof. The bottoms of the two ends of the flue are equipped with supporting frames; the flue comprises a flue wall plate, longitudinal ribs which are arranged in a flue gas flow direction, ring ribs which are arranged around the outer side wall of the flue, and a supporting rodarranged in the flue, wherein the span of the flue is not smaller than 35 m, and flue span is 4-6 times the height of a flue section; a ratio of width of the flue section to the height of the flue section is not greater than 1 to 2; the flue wall plate is of a rectangular structure enclosed by an upper wall plate, a lower wall plate and side vertical plates at the two sides; the longitudinal ribsare welded and fixed on the outer side wall of the flue wall plate; the longitudinal ribs are arranged in a spaced mode in an annular direction of the flue section; and the ring ribs are perpendicular to the flue gas flow direction. A support point of a supporting system is relatively great in span setting, setting number of the supporting system is small, occupied space is small, and integral stability of the flue is good.

Description

technical field [0001] The invention relates to the technical field of flue support, in particular to a large-span flue and a construction method thereof. Background technique [0002] Among the domestic flue support systems, the most widely used and mature technology is to set a support every 6-8m, but this setting method needs to occupy a large space and site. [0003] For a new power plant project, the cost of land accounts for a large proportion of the overall cost, and maximizing the use of every inch of land can effectively control the overall cost of the project. In power plant desulfurization and denitrification transformation projects, due to the limitations of existing layout conditions, downtime and other objective factors, the site conditions are often relatively harsh, and the construction period is tight. There is no machine tool to enter the site for operation, and the construction is difficult. [0004] In the denitrification and desulfurization processes, ...

AI Technical Summary

Problems solved by technology

In power plant desulfurization and denitrification transformation projects, due to the limitations of existing layout conditions, downtime and other objective factors, the site conditions are often relatively harsh, and the construction period is tight. There is no machine tool to enter the site, and the construction is difficult

[0004] In the denitrification and desulfurization processes, the space ratio of the flue is relatively large. If the traditional method is still adopted, the space occupied by the flue support system will greatly limit the layout and application of the entire process, and increase the design difficulty and construction cost.

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