Boiler and convection bank structure of boiler

Abstract

The invention discloses a convection bank structure of a boiler. The convection bank structure comprises a plurality of pipes which are vertically arranged in a boiler wall and used for exchanging heat with high temperature flue gas, a flue gas inlet is formed in the top of the boiler wall, and a flue gas outlet is formed in the bottom of the boiler wall; upper headers and lower headers communicated with the multiple pipes are connected to the tops and the bottoms of the multiple pipes correspondingly, and the upper headers and the lower headers are communicated with a boiler barrel through guide-out pipes and down pipes correspondingly; saturated water in the boiler barrel enters the lower headers through the down pipes, absorbs flue gas waste heat to form a steam-water mixture in the saturated state, rises along the pipes to enter the upper headers, and is then guided into the boiler barrel through the guide-out pipes for steam-water separation, and a natural circulation loop is formed; and the upper headers and the lower headers can adopt structures with small diameters, and the multiple pipes are vertically arranged in the boiler wall, so that the structure is simple and compact, hanging and installation are easy, the height space of a heated face is large, the convection heat absorption effect is good, and the cooling requirement of the boiler flue gas can be met. The invention further discloses the boiler comprising the above convection bank structure.

Description

technical field [0001] The invention relates to the field of boiler flue gas cooling, in particular to a boiler convection tube bundle structure. In addition, the present invention also relates to a boiler comprising the above convection tube bundle structure. Background technique [0002] Industrial boilers, especially saturated steam boilers and vertical boilers with very low superheat, have different structural arrangements from superheated steam boilers with conventional parameters. Convection tube bundles with relatively large heat absorption must be used instead of superheaters with conventional parameters to absorb flue gas. waste heat to reduce smoke temperature. [0003] There are generally two types of industrial boilers: horizontal and vertical. Generally, vertical boilers have large capacity, long combustion time, and high thermal efficiency, so they are more widely used. There are many types of flow tube bundle structures and arrangements for vertical boilers,...

AI Technical Summary

Problems solved by technology

[0004] Therefore, how to solve the problems such as the complex structure of the boiler convection tube bundle, difficult sealing, and difficult installation is a technical problem that those skilled in the art need to solve at present.

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