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A Finned Tube Fluidized Bed Heater

A heat extractor and finned tube technology, which is applied in the field of finned tube fluidized bed heat extractors, can solve the problems of unresolved thermal stress and unresolved finned tubes, etc., so as to reduce the occurrence of local dead zones The probability of the increase in the degree of turbulence, the effect of heat transfer process intensification

Active Publication Date: 2020-04-07
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN2457555Y proposes annular fin and oblique fin structure, which strengthens the heat transfer process outside the finned tube and improves the overall heat transfer efficiency of the finned tube, but the problem of thermal stress has not been solved, and the heat transfer efficiency has further improvement room for improvement
[0006] In short, the published finned tube patents and related documents do not solve the above problems well

Method used

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  • A Finned Tube Fluidized Bed Heater
  • A Finned Tube Fluidized Bed Heater
  • A Finned Tube Fluidized Bed Heater

Examples

Experimental program
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Effect test

Embodiment 1

[0050] figure 1 As an example of combined finned tube implementation, the three types of fins 2 are reasonably combined to obtain combined finned tubes, so that the secondary flow caused by the three types of fins 2 near the surface of the finned tube is common When the effect occurs, the fluid disturbance intensity is significantly increased, and the heat transfer coefficient can be increased by 20-40%; the boundary layer on the surface of the finned tube is destroyed, and the heat transfer resistance is reduced; The contact between B and the finned tube is more sufficient; the existence of the fin 2 increases the heat transfer area; the fin 2 is installed in a spiral form, which disperses the thermal stress and solves the problem of tube explosion caused by the stress concentration of the finned tube.

Embodiment 2

[0052] Image 6 For the combined finned tube heat extractor of the present invention, in the shell side, the catalyst B to be cooled enters the heat extractor from the catalyst inlet pipeline, and under the action of fluidizing wind A, the catalyst B to be cooled flows convectively with the finned tube After the heat exchange, the cooling catalyst C flows out from the catalyst outlet at the bottom of the heat collector; in the tube side, water D flows in from the upper casing of the finned tube, and after heat exchange with the catalyst, it becomes water vapor E from the upper steam outlet of the finned tube discharge. Figure 7 For the tube bundle layout diagram of the external heat extractor of the present invention, the novel finned tubes are arranged according to Figure 7 Installed in the arrangement shown, the secondary flow on the surface of each finned tube will disrupt the entire flow field of the heat collector, thereby increasing the turbulence of the entire shell-...

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Abstract

The invention discloses a finned tube fluidized bed heater. The finned tube fluidized bed heater comprises a shell, a vertical tube bundle and a gas distributor. The vertical tube bundle is composed of a plurality of finned tubes. Each finned tube comprises a light tube and fins, wherein the fins are longitudinally welded to the surface of the light tube. The fins include different structures, andspecifically, a fin bending structure, a fin trepanning structure, a fin notching structure and a fin structure in the combined form of the three kinds of fins are included. According to the finned tube fluidized bed heater, heat transfer is enhanced, and the heat transfer efficiency is improved.

Description

technical field [0001] The invention relates to a heat collector for a finned tube fluidized bed, which belongs to the field of heat exchange devices for petroleum processing and chemical industry. Background technique [0002] In technical fields such as petroleum processing and chemical industry, in order to ensure the controllability and stability of the system temperature, reasonable heat collectors are generally configured in the industry to adjust the temperature of the system, so as to achieve temperature regulation. Fluidized bed heat collectors are widely used in petroleum, chemical and other industries due to their good heat transfer effect and small axial and radial temperature differences. [0003] Fluidized bed heat extractors can be divided into internal heat extractors and external heat extractors according to the layout, that is, the heat extractors installed inside the regenerator are internal heat extractors, and the heat extractors installed outside the re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D13/00F28F1/10
CPCF28D13/00F28F1/10
Inventor 卢春喜李建涛姚秀颖
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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