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Flue gas air preheater, and a method for installation, as well as air pipe component for flue gas air preheater

A technology of air preheater and air pipeline, which is applied in the direction of heat exchanger sealing device, combustion method, indirect heat exchanger, etc., and can solve problems such as long boiler downtime

Active Publication Date: 2013-01-30
VALMET POWER OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Clearly, replacing and repairing the entire LUVO bank would result in a long downtime of the boiler and no effort could be made against other shorter interruptions in operation

Method used

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  • Flue gas air preheater, and a method for installation, as well as air pipe component for flue gas air preheater
  • Flue gas air preheater, and a method for installation, as well as air pipe component for flue gas air preheater
  • Flue gas air preheater, and a method for installation, as well as air pipe component for flue gas air preheater

Examples

Experimental program
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Embodiment Construction

[0028] FIG. 1 shows a schematic diagram of a system for generating and utilizing heat energy, for example a boiler utilizing the combustion of solid fuels. The system comprises: a furnace 1 in which the combustion of the fuel takes place; a flue gas duct 2 into which the flue gases formed in the combustion are led; a flue gas air preheater 3 for the combustion air used for the combustion heated by the flue gas air preheater before it is introduced into the furnace; and the chimney 4 . A preheater 3 is arranged in the flue gas duct 2 . As can be seen from the drawings, the preheater 3 is arranged at the terminal end of the flue gas duct 2 along the flow direction F of the flue gas.

[0029] Figure 2 shows an embodiment of the preheater 3 in more detail. In this example, the air flows S and P to be heated are guided into the preheater 3 from the lower air supply regions 5 , 6 of the preheater 3 . The heated air is exhausted from the upper part of the preheater 3 . In this ex...

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PUM

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Abstract

A flue gas air preheater and a method for the installation of air pipes for a flue gas air preheater (3), wherein a set of air pipes (7) is connected to said preheater, the method comprising: cutting an air pipe (7) connected to the preheater and detaching the portion of the air pipe (7) that is to be removed from the preheater for replacement; fitting a separate new air pipe (7a) in place of the air pipe portion to be removed; and connecting said new air pipe (7a) to the remaining portion (7b) of the air pipe (7) in a sealed manner, as an extension of it. In an example, the fixing is performed utilizing a fastening sleeve (13) fixed to the end of the new air pipe (7a) and inserting it in the remaining portion (7b) of the air pipe (7). In an example, the fixing is performed by means of a mechanical sealing solution (13d, 13f) without welding. The air pipe component for the flue gas air preheater (3) comprises: an air pipe (7a), and a fastening sleeve (13).

Description

technical field [0001] The invention relates to a method for installing air ducts of a flue gas air preheater. Furthermore, the invention relates to a flue gas air preheater. The invention also relates to air duct components for flue gas air preheaters. Background technique [0002] To preheat combustion air for large solid fuel boilers, flue gas air preheaters (German Luftvorwörmer, LUVO) are commonly used, in which the heating medium (i.e. flue gas) flows outside the heat exchanger tubes and is to be The heated medium (ie air) flows inside the heat exchanger tubes. Heat exchanger ducts (also called air ducts in this description) are generally arranged horizontally within the flue gas duct, and a large number of heat exchanger ducts constitute a heat exchanger unit. The heat exchanger units at different height levels are connected to each other by means of air ducts arranged outside the flue gas ducts. There are also configurations in which the flue gas flows inside the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D7/16F28F11/00
CPCF28F11/00F28F2275/00F28D7/1607F28D21/001Y10T29/4973Y02E20/34F23L15/04
Inventor J.尼库尔V.凯努
Owner VALMET POWER OY