Waste heat boiler

Abstract

The invention provides a waste heat boiler. The waste heat boiler comprises a shell body, a pipe box, a pipe box inner part, a flat cover, a closure head, a manhole and a supporting base plate, wherein the shell body is formed by fixedly connecting a front barrel, a special-shaped middle-section barrel and a rear barrel in sequence, a pipe plate is arranged between the front barrel and the pipe box, an air distribution barrel is arranged near the pipe plate and arranged at the rear end of the pipe box inner part, a plurality of supporting plates are arranged inside the shell body, a plurality of heat exchange straight pipes are arranged on the supporting plates, each heat exchange straight pipe is of a semi-closed structure with one open end and the closed other end, the open ends of the heat exchange straight pipes penetrate through the pipe plate, sleeves are arranged inside the heat exchange straight pipes, inner pipes are arranged inside the sleeves, the front ends of the inner pipes penetrate through the outer wall of the air distribution barrel and are fixedly connected with the outer wall of the air distribution barrel, backflow channels are arranged between the rear ends of the inner pipes and the closed ends of the heat exchange straight pipes, and bent heat conduction pieces are arranged between the heat exchange straight pipes and the sleeves. The waste heat boiler has the advantages of being good in heat exchange effect and long in service life.

Description

technical field [0001] The invention belongs to the technical field of boilers, in particular to a waste heat boiler. Background technique [0002] Waste heat boilers mainly use the waste heat in the industrial production process to produce steam boilers, which can rationally use the remaining energy and reduce pollution. At present, the heat exchange tubes of waste heat boilers generally use U-shaped tubes, but there are two major defects in bending: one is that the inner surface of the bent part may be compressed when the tube is bent; the other is that the outer surface of the bent part is stretched Fine cracks may occur, which will not only reduce the performance of the heat exchange tube, but also have uncertain quality risks. During the use of the waste heat boiler, generally the U-shaped tube is fed in a straight section, after heat exchange, and then enters the second straight section through the curved semicircular part for heat exchange. When the heat exchange tub...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a waste heat boiler, which solves the technical problems that the heat exchange tubes in the existing waste heat boiler are difficult to manufacture and easy to be damaged.

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