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Plate type air preheater

An air preheater, plate type technology, applied in lighting and heating equipment, combustion methods, indirect carbon dioxide emission reduction, etc. Low efficiency and other problems, to achieve the effect of solving the problem of equipment dust accumulation, reliable long-term operation and reducing equipment weight

Active Publication Date: 2009-06-17
GANSU LANPEC TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the air preheaters in the prior art are heat pipe, shell and tube, heat storage and plate-fin air preheaters, which generally have low heat transfer efficiency, air leakage, large volume, easy dust accumulation and high long-term operating costs. shortcoming
Moreover, the existing air preheaters that use corrugated plates as heat transfer elements are mostly staggered channels, which have low heat transfer efficiency and cannot solve the matching problem of heat transfer efficiency and pressure drop

Method used

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  • Plate type air preheater
  • Plate type air preheater
  • Plate type air preheater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: A plate-type air preheater for a one-layer plate bundle assembly.

[0033] structured as figure 1 As shown, it includes: a box body 1, heat exchange components and air and flue gas inlet and outlet pipe boxes, the plate heat exchange components arranged in the box body 1, and the plate heat exchange components are combined into a plate by a layer of plate bundle modules 4 A bundle assembly 7, the upper end of the plate bundle assembly 7 communicates with the flue gas inlet pipe box 3 and the air outlet pipe box 2, the lower end of the plate bundle assembly communicates with the smoke outlet pipe box 6 and the air inlet pipe box 5, the plate bundle The module 4 is composed of corrugated plates, and the air in the plate bundle module 4 and the flue gas passage are closed passages in opposite directions.

[0034] The shape of the corrugated sheet is hexagonal, with triangular distribution guide areas 401 and 403 on the top and bottom respectively, and a rectang...

Embodiment 2

[0040] Example 2: Plate Air Preheater for Two-layer Plate Bundle Assembly

[0041] like figure 2 As shown: including: box body 1, heat exchange components and air and flue gas inlet and outlet pipe boxes, the plate heat exchange components arranged in the box body 1, the plate heat exchange components are composed of upper and lower two-layer plate bundle modules 4 Combined into plate bundle assemblies I and II, the upper end of the plate bundle assembly I communicates with the flue gas inlet pipe box 3 and the air outlet pipe box 2, and the lower end of the plate bundle assembly II communicates with the flue gas outlet pipe box 6 and the air inlet pipe box 5 , the plate bundle module 4 is composed of stacked corrugated plates, and the air and flue gas channels in the plate bundle module 4 are closed passages in opposite directions.

[0042]The shape of the corrugated sheet is hexagonal, with triangular distribution guide areas 401 and 403 on the top and bottom respectively,...

Embodiment 3

[0049] Example 3: Air preheater for three-layer plate bundle assembly.

[0050] like image 3 As shown: the box body 1 is provided with upper, middle and lower three-layer plate bundle module layers, the upper layer is the plate bundle module layer I of the high temperature section, the middle layer is the plate bundle module layer II of the medium temperature section, and the lower layer is the plate bundle module layer of the low temperature section Layer III, the structure and arrangement of the board bundle module 4 are the same as those in Embodiments 1 and 2 and will not be described in detail. The materials used: the upper plate bundle module I adopts high temperature resistant 354 alloy material, which is suitable for medium heat exchange above 1000°C; the medium temperature section plate bundle module 4 adopts 304 alloy steel, which is suitable for medium heat exchange around 700°C; the low temperature section plate bundle module 4 adopts Below 170-180°C, low-tempera...

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Abstract

The invention relates to a sheet air preheating device, which comprises: a box, a heat exchange element, and an air-smoke entrance tubular box, wherein said box is arranged with sheet heat exchange element formed by sheet beam with at least one layer of one sheet beam module; the upper end of sheet beam is through to the smoke inlet tubular box and the air outlet tubular box, while the lower end is through to the smoke outlet tubular box and the air inlet tubular box; the sheet beam module is formed by layered ripple sheets; the air-smoke channels of sheet beam module are sealed channels with reversed direction. The invention uses reverse flow to exchange heat, with high efficiency, small volume, light weight and low cost.

Description

technical field [0001] The invention relates to a plate type air preheater used for heat exchange between high-temperature flue gas of boilers, heating furnaces and waste gas catalytic incinerators and cold air used for combustion for waste heat recovery. Background technique [0002] At present, heat exchange equipment using corrugated plates as heat transfer elements represents the mainstream development direction of heat exchange equipment, and more and more tube heat exchange equipment has been or will be replaced by plate heat exchange equipment. [0003] Most of the air preheaters in the prior art are heat pipe, shell and tube, heat storage and plate-fin air preheaters, which generally have low heat transfer efficiency, air leakage, large volume, easy dust accumulation and high long-term operating costs. shortcoming. Moreover, most of the existing air preheaters using corrugated plates as heat transfer elements are staggered channels, which have low heat transfer effi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23L15/00
CPCY02E20/34
Inventor 张延丰宋秉棠
Owner GANSU LANPEC TECH
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