Convection section middle header internal structure convenient to overhaul

Abstract

The invention relates to a convection section middle header internal structure convenient to overhaul, and belongs to the field of waste heat boiler header structures.The convection section middle header internal structure convenient to overhaul comprises a first convection section and a second convection section, and the first convection section is arranged on the upper portion of the second convection section; the second convection section comprises a third coiled pipe and a fourth coiled pipe which are symmetrically arranged, and an expansion space is reserved between the third coiled pipe and the fourth coiled pipe; a first middle collecting box is arranged at the bottom of the third coiled pipe, a second middle collecting box is arranged at the bottom of the fourth coiled pipe, the first middle collecting box and the second middle collecting box are symmetrically arranged, and a maintenance space is arranged between the first middle collecting box and the second middle collecting box. The positions of the multiple inlet headers and the multiple outlet headers are reasonably designed, the space can be utilized to the maximum extent, the situation that layout is affected by cross between the inlet headers and the outlet headers and the serpentine pipes can be prevented, and meanwhile great convenience is brought to maintenance and use through the design of the expansion space and the maintenance area.

Description

technical field [0001] The invention relates to an internal structure of an intermediate header in a convection section which is convenient for maintenance, and belongs to the field of waste heat boiler header structures. Background technique [0002] The organic heat carrier boiler is mainly composed of combustion equipment, square box coil furnace, convection tube bundle and other components. Square box coil furnace is divided into left coil furnace and right coil furnace, so when designing the convection tube bundle, it is divided into left and right parts, and it is inconvenient to check and repair the welding point of the tube and header; when designing the convection section, it is necessary to consider The convective heat exchange surface, which must ensure the distance between the middle elbow of the left and right convection tube bundles; the existing header structure layout, the design and dimension standards for the shortest distance between the left and right con...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the above disadvantages and provide an internal structure of the intermediate header in the convection section that is convenient for maintenance, which can solve the problem of inspection and maintenance of the welding point between the header and the serpentine tube, and ensure the service life of the header

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