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Plate air preheater

An air preheater, plate type technology, applied in heat exchanger types, indirect heat exchangers, heat exchange equipment, etc., can solve the problems of long manufacturing cycle and large welding workload, and achieve simple production and good sealing performance. Effect

Inactive Publication Date: 2011-04-06
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the disadvantages of the prior art, such as large welding workload and long manufacturing cycle, of the fully welded plate air preheater, and proposes a new type of plate air preheater with simple manufacture and good sealing performance - riveted or bolted plate air preheater. Preheater

Method used

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Embodiment Construction

[0037] like Figure 1-Figure 18 As shown, the four corners of the heat transfer plate 1 are cut off, and after the four corners are cut off, the plate 2 is folded, wherein the sides a and c are folded upward, and the sides b and d are folded downward. The rib support 4 is turned over, and the lower surface vertical rib support 5 is welded to the lower surface of the sheet 3 after hemming, so far to form a basic plate shape.

[0038] The basic plate type is interlocked in two, and the interlocking opposite sides are aa and cc. Each side is clamped with a U-shaped trim 6. After the U-shaped trim 6 is stuck, open holes together with the U-shaped trim 6 and the two sides of aa and cc. , and riveted with rivets 7 to form a single-channel core 8 . Then weld the four-corner sealing angle steel 9 at the four corners of the single-channel core 8, so that the four corners of the single-channel core 8 are completely sealed, and then superimpose and interlock a single-channel core 8, and...

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Abstract

The invention discloses a plate air preheater by which the defects of heavy welding workload, long manufacturing cycle and the like of the traditional all welded plate air preheater are overcome. The technical scheme comprises the following steps: selecting two rectangular heat transfer plates, cutting off four corners, and folding edges, wherein one pair of edges is folded upwards, the other pair of edges is folded downwards, and the two folded heat transfer plates are buckled with each other in the vertical direction; carrying out riveting or bolting seal on the two buckled edges, carrying out welding seal on four corners of the heat transfer plates with steel angles to form single-channel plate cores, and buckling the single-channel plate cores two by two; and carrying out riveting or bolting seal on the two buckled edges to form a multi-channel plate core of which the channel directions alternately change. The invention is applicable to the petrochemical tube heating furnace and the flue gas waste heat recovery system of various boilers (industrial boilers, station boilers, industrial boilers and kilns and the like), and has the advantages of simple manufacturing process and good sealing property.

Description

technical field [0001] The invention belongs to the field of air preheaters, in particular to a plate-type air preheater used in petrochemical tubular heating furnaces and flue gas waste heat recovery systems of various boilers (industrial boilers, power plant boilers, industrial furnaces, etc.) . Background technique [0002] In the flue gas waste heat recovery system of the petrochemical tubular heating furnace, at present, the plate air preheater successfully applied in China is a fully welded and sealed structure. Literature "Petrochemical Equipment", Volume 36, Issue 4, July 2007, Page 83 "Application of Large Plate Air Preheater in Petrochemical Plants" (Yu Liangjian, Li Jiamin, Zhang Yanfeng) Introduction: Successfully applied large plate air preheater The plate is made of stainless steel and other corrosion-resistant materials, and it is a fully welded and sealed structure. As of July 2007, it has been running continuously at full load for 2 years. In the patent li...

Claims

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Application Information

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IPC IPC(8): F23L15/00F28D9/02F28F3/10
CPCF28D9/0037
Inventor 王德瑞张铁峰杨利然
Owner CHINA PETROCHEMICAL CORP
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