Combined bionic anti-abrasion H-shaped fin elliptical flue gas heat exchange tube

A bionic anti-wear, combined technology, applied in damage protection, tubular components, heat exchange equipment, etc., can solve the problems of increased power consumption, no energy saving, and increased flow resistance of compressors, so as to reduce resistance and prolong service life. , the effect of reducing flow resistance

Active Publication Date: 2014-07-30
SHANDONG XINGQIANG CHEM IND TECH RES INST CO LTD
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  • Abstract
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Problems solved by technology

However, while this vortex generator improves the heat transfer performance, it will inevitably cause a substantial increase in flow resistance, which means a substantial increase in the power consumption of the compre

Method used

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  • Combined bionic anti-abrasion H-shaped fin elliptical flue gas heat exchange tube
  • Combined bionic anti-abrasion H-shaped fin elliptical flue gas heat exchange tube
  • Combined bionic anti-abrasion H-shaped fin elliptical flue gas heat exchange tube

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Example Embodiment

[0036] Example:

[0037] Considering that the first through hole 4 and the hemispherical cingule 3 can enhance airflow disturbance and reduce resistance; at the same time, considering the complexity and cost of processing and other factors, the present invention uses a mold to process four first through holes 4 and hemispherical Ding cells3.

[0038] The length of the elliptical tube and the length of the minor semi-axis are 64mm and 40mm respectively; the thickness of the fin is 3mm, the length is 76.5mm, the width is 54mm, the width of the slot is 10mm, the radius of the hemispherical cypher is 2mm, and the radius of the first through hole is 1mm, the bottom surface of the hemispherical chrysalis is perforated so that the airflow between the fins can flow together, and it can also enhance heat transfer and reduce the deposition of ash on the heat exchanger. The distance between the centers of the cytospheres on the same fin is 6 mm, and the distance between the centers of c...

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Abstract

The invention discloses a combined bionic anti-abrasion H-shaped fin elliptical flue gas heat exchange tube which comprises more than two rows of elliptical tubes in the flowing direction of gas and fins arranged on the two sides of the elliptical tubes, wherein a plurality of pairs of semispherical dimples are arranged on the windward sides of the fins; first through holes penetrating through the fins are formed in the bottoms of the semispherical dimples; a plurality of eddy generators are arranged on the leeward sides of the fins; a through hole adjacent to each eddy generator is formed in one side of the eddy generator. According to the flue gas heat exchange tube, the elliptical tubes are used as base tubes, the fins are arranged on the inner two sides of the elliptical tubes, the semispherical dimples and the eddy generators are arranged on the fins, and by the dimples, the flowing resistance can be effectively reduced to avoid the formation of large eddy turbulence in a flow field; in addition, by the novel combined fin structure, the comprehensive heat exchange efficiency can be effectively improved, and tail soot formation and tube abrasion can be greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of heat exchangers, in particular to a combined bionic wear-resistant H-fin elliptical flue gas heat exchange tube. Background technique [0002] my country's power station boilers are mainly coal-fired, while power coal is mostly low-quality coal, and the concentration of fly ash in the flue gas is high. Tail flue economizer is one of the main equipment for low temperature heat exchange. In the tail flue, there are fly ash, coal particles, sulfur and other components in the flue gas, the flue gas flows outside the pipe, and the water flows inside the pipe. The existence of fly ash will lead to serious ash accumulation in the heat exchanger, which will deteriorate the heat transfer effect, increase the exhaust temperature, and reduce the efficiency of the boiler. At the same time, the flue gas resistance will also increase accordingly, which will increase the power consumption of the induced draft fan. In ...

Claims

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Application Information

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IPC IPC(8): F28F1/02F28F1/24F28F19/00
Inventor 唐桂华赵学斌
Owner SHANDONG XINGQIANG CHEM IND TECH RES INST CO LTD
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