WATERWALL STRUCTURE FOR BOILER

PROBLEM TO BE SOLVED: To provide a reliable boiler waterwall structure avoiding adverse effects to pipe welding parts due to thermal stress of fins, and suppressing burning of the fins. SOLUTION: In the waterwall structure, a waterwall is formed by connecting the fin 2 to an adjacent waterwall pipe...

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Hauptverfasser: KAWANE KOZO, TOKAWA KENJI
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creator KAWANE KOZO
TOKAWA KENJI
description PROBLEM TO BE SOLVED: To provide a reliable boiler waterwall structure avoiding adverse effects to pipe welding parts due to thermal stress of fins, and suppressing burning of the fins. SOLUTION: In the waterwall structure, a waterwall is formed by connecting the fin 2 to an adjacent waterwall pipe 1 in a pipe axial direction. The fin 2 is comprised of a plurality of plates mutually independent in the pipe axial direction, and respective plates are arranged with intervals along the pipe axial direction. The fin connected to each of adjacent waterwall pipes is formed shorter than half of a distance between the waterwall pipes for a portion of a predetermined length, and by forming it short, a temperature of a fin tip is provided below a burning temperature range. In the plurality of independent plates, respective plates are connected by a connecting member to form an integral plate, and the integral plate is welded to the waterwall pipe. A support plate 3 is provided for partially fixing the shortly formed fins of each waterwall pipe, and a refractory material 5 is supported in a fin fixing opposite side of the support plate 3. COPYRIGHT: (C)2007,JPO&INPIT
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SOLUTION: In the waterwall structure, a waterwall is formed by connecting the fin 2 to an adjacent waterwall pipe 1 in a pipe axial direction. The fin 2 is comprised of a plurality of plates mutually independent in the pipe axial direction, and respective plates are arranged with intervals along the pipe axial direction. The fin connected to each of adjacent waterwall pipes is formed shorter than half of a distance between the waterwall pipes for a portion of a predetermined length, and by forming it short, a temperature of a fin tip is provided below a burning temperature range. In the plurality of independent plates, respective plates are connected by a connecting member to form an integral plate, and the integral plate is welded to the waterwall pipe. A support plate 3 is provided for partially fixing the shortly formed fins of each waterwall pipe, and a refractory material 5 is supported in a fin fixing opposite side of the support plate 3. 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subjects BLASTING
HEATING
LIGHTING
MECHANICAL ENGINEERING
METHODS OF STEAM GENERATION
STEAM BOILERS
STEAM GENERATION
WEAPONS
title WATERWALL STRUCTURE FOR BOILER
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