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Self-cleaning air preheater

An air preheater and self-cleaning technology, applied in heat exchanger types, indirect heat exchangers, clean heat transfer devices, etc., can solve the problems of low heat exchange efficiency, general waste heat recovery effect, low heat utilization rate, etc. problems, to achieve the effect of improving heat exchange efficiency, reducing dust accumulation, and improving heat transfer efficiency

Pending Publication Date: 2020-06-05
GUANGDONG JUMPER THERMAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common shell-and-tube air preheater uses the high-temperature flue gas and air generated in industrial production to exchange heat energy, and then effectively recovers the waste heat of the flue gas to achieve the purpose of energy reuse. However, the traditional shell-and-tube air preheater The heat exchange efficiency is not high, the heat utilization rate is low, and the waste heat recovery effect is average

Method used

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  • Self-cleaning air preheater
  • Self-cleaning air preheater
  • Self-cleaning air preheater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as Figure 1-4 As shown, the self-cleaning air preheater includes a heat exchange chamber 1, the top of the heat exchange chamber 1 is provided with a flue gas inlet 2, and the bottom of the heat exchange chamber 1 is provided with a flue gas exhaust port 3, and the flue gas inlet The gas port 2, the heat exchange chamber 1 and the flue gas exhaust port 3 form a high-temperature flue gas channel. A plurality of heat exchange tubes 4 are arranged horizontally in the heat exchange chamber 1, and both ends of the heat exchange tubes 4 are provided with partitions 5, and the partitions 5 are provided with openings 51 corresponding to the number of heat exchange tubes 4, wherein the openings The aperture of 51 is not less than the diameter of heat exchange tube 4, and heat exchange tube 4 comprises upper layer heat exchange tube 41 and lower layer heat exchange tube 42, and one end of lower layer heat exchange tube 42 is provided with air inlet 6, and upper layer heat e...

Embodiment 2

[0064] Such as Figure 14 As shown, this embodiment includes three heat exchange chambers 1 connected side by side, a plurality of heat exchange tubes 4 running through the three heat exchange chambers 1 horizontally, and the two ends of the heat exchange tubes 4 and the two adjacent heat exchange chambers 1 There are partitions 5 between them, and the partitions 5 are provided with openings 51 corresponding to the number of heat exchange tubes 4, wherein the diameter of the openings 51 is not smaller than the diameter of the heat exchange tubes 4, and the heat exchange tubes 4 include the upper heat exchange Tube 41 and lower layer heat exchange tube 42, one end of lower layer heat exchange tube 42 is provided with air inlet 6, the same end of upper layer heat exchange tube 41 is provided with air exhaust port 7, lower layer heat exchange tube 42 and upper layer heat exchange tube The other end of 41 is provided with an air transfer chamber 8, and the air inlet 6, the lower h...

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Abstract

The invention relates to the field of heat exchangers, in particular to a self-cleaning air preheater. The top end of a heat exchange chamber is provided with a flue gas inlet, the bottom end of the heat exchange chamber is provided with a flue gas exhaust port, a plurality of heat exchange tubes are arranged in the horizontal direction of the heat exchange chamber, partition plates are arranged at both ends of the heat exchange tubes, and the partition plates are provided with holes in the number corresponding to the number of the heat exchange tubes. The heat exchange tubes comprise the upper-layer heat exchange tubes and the lower-layer heat exchange tubes. One end of each lower-layer heat exchange tube is provided with an air inlet, the same ends of the upper-layer heat exchange tubesare provided with air exhaust ports. The other ends of the lower-layer and upper-layer heat exchange tubes are provided with an air changing chamber. The air inlets, the lower-layer heat exchange tubes, the air changing chamber, the upper-layer heat exchange tubes and the air exhaust ports form an air heat exchange channel. By increasing the heat transfer coefficient and the heat transfer temperature difference, the purpose of strengthening heat transfer is achieved, and a dust removal device is arranged on a heat exchanger, so that the dust accumulation phenomenon of the heat exchange tubes is reduced and the heat exchange efficiency of the air preheater is further improved.

Description

technical field [0001] The invention relates to the technical field of heat exchangers, in particular to a self-cleaning air preheater. Background technique [0002] There are various types of air preheaters, including rotary air preheaters, plate air preheaters and shell-and-tube air preheaters, etc. Among them, the theoretical research and design technology of shell-and-tube air preheaters are perfect and reliable. Good performance, the most widely used. The common shell-and-tube air preheater uses the high-temperature flue gas and air generated in industrial production to exchange heat energy, and then effectively recovers the waste heat of the flue gas to achieve the purpose of energy reuse. However, the traditional shell-and-tube air preheater The heat exchange efficiency is not high, the heat utilization rate is low, and the waste heat recovery effect is average. Contents of the invention [0003] Aiming at the above-mentioned defects in the prior art, the present ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23L15/04F28D7/16F28G1/08
CPCF23L15/04F28D7/1607F28G1/08Y02E20/34
Inventor 万鹏赖日东唐转清杨培忠宋旭吴德富
Owner GUANGDONG JUMPER THERMAL TECH