Manufacturing method of large air preheater

A technology of an air preheater and a manufacturing method, applied in the field of boilers, can solve the problems of inconvenience and heavy transportation of large air preheaters, and achieve the effects of improving stability, reducing overall quality and reducing weight

Active Publication Date: 2019-01-29
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problems of heavy and inconvenient transportation of traditional large-scale air preheaters, the present invention provides a large-scale air preheater with light weight and convenient transportation

Method used

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  • Manufacturing method of large air preheater
  • Manufacturing method of large air preheater
  • Manufacturing method of large air preheater

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] like Figure 6 ~ Figure 11 Shown, the manufacture method of large-scale air preheater of the present invention comprises the following steps:

[0037] (1) Prefabrication of the inner and outer ring compartments at the production site: divide the compartment part of the air preheater into multiple fan-shaped inner rings distributed around the circumference of the central cylinder according to the designed radial size and circumferential division The bins 9 and a plurality of fan-ring outer ring bins 12, the outer ring bins 12 are connected to the central cylinder 1 through the inner ring bins 9, the inner ring bins 9 are formed by the inner ring radial partition 10 and the inner ring ring Composed of partitions 11, the outer ring compartment 12 is composed of radial partitions 13 of the outer ring and circumferential partitions 14 of the outer ring;

[0038] (2...

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Abstract

The invention discloses a manufacturing method of a large air preheater. The manufacturing method comprises the following steps of prefabricating an inner ring warehouse grid and an outer ring warehouse grid on a production site, transportation, field splicing and field welding, the warehouse grid part of the air preheater is divided into a plurality of fan-shaped inner ring warehouse grids and aplurality of fan-shaped outer ring warehouse grids which are distributed around the circumference of a center cylinder according to the design radial size and the circumference dividing degree, the outer ring warehouse grids are connected with the center cylinder through inner ring warehouse grids, each inner ring warehouse grid is composed of an inner ring radial partition plate and an inner ringcircumferential partition plate, and each outer ring warehouse grid is composed of an outer ring radial partition plate and an outer ring circumferential partition plate. According to the manufacturing method, the inner ring warehouse grids and the outer ring warehouse grids are prefabricated on the production site firstly, are transported to the site for splicing and are welded into an empty pre-heater whole finally, so that the large air preheater is convenient to carry and transport.

Description

technical field [0001] The invention relates to the field of boilers, in particular to a method for manufacturing a large-scale air preheater used for boiler flues. Background technique [0002] The air preheater, also referred to as the air preheater for short, is a preheating device that improves the heat exchange performance of the boiler and reduces heat loss. The function of the air preheater is to conduct the heat carried in the flue gas discharged from the tail flue of the boiler to the air before entering the boiler through the heat sink, and preheat the air to a certain temperature. Air preheaters are mostly used in coal-fired power plant boilers, and can be divided into two types: tube box type and rotary type. The rotary air preheater is arranged at the tail of the boiler and is a regenerative heat exchanger that operates in countercurrent. Metal heat storage elements processed into special corrugations are tightly placed in the fan-shaped compartment of the rot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23L15/04F23J15/06
CPCF23J15/06F23L15/04Y02E20/34
Inventor 张智慧魏永贵付平潘正权黄雪飞任德刘君舒红梅
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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