Reinforced heat transfer tube

A technology of heat transfer tubes and outer tubes, applied in the field of heat transfer tubes, can solve the problems of deformation of the helical sheet, decrease of the guiding effect of the helical sheet, blockage of the heat transfer pipe, etc., and achieve the effects of reducing the volume, improving the rigidity and increasing the specific surface area.

Active Publication Date: 2010-01-06
WISON ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the structure of the heat exchange tube is relatively simple and easy to manufacture, after a period of use, the spiral sheet is prone to deformation, and the guiding effect of the spiral sheet is reduced at this time, and the heat exchange tube may even be blocked in severe cases.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of enhanced heat transfer tube, its structure is as figure 1 As shown, the technology of the present invention is used to manufacture radiant furnace tubes. The heat transfer tube is composed of an outer tube 1, a fixed rod 2 and a spiral band 3. A piece of spiral band 3 is welded by high-frequency welding technology on the fixed rod. The spiral band 3 is the right Spiral ribbon. The specific parameters of the radiant furnace tube are: the total length of the furnace tube is 12000 mm, and the inner diameter of the outer tube 1 is D 1 =100mm, the wall thickness is 6.5mm, the outer diameter D of the fixed rod 2 2 =25mm, the helix angle β=60° of the spiral band 3, the thickness of the spiral band 3 is 5mm, the length L of the spiral band 3 1 =11940mm. The circulation area of ​​the radiation furnace tube is 7175mm 2 , the specific surface area is 43.79 (unit is 1 / m), and the inner diameter of the ordinary tube with the same flow area as this radiant furnace tube ...

Embodiment 2

[0038] A kind of enhanced heat transfer tube, its structure is as figure 2 As shown, the heat transfer tube includes an outer tube 1, a fixed rod 2 and a spiral band 3, the outer tube 1 is a cylindrical hollow tube, the fixed rod 2 is a solid metal rod, and the spiral band 3 is continuously welded on the fixed rod 2 to form a spiral band , the fixed rod 2 and the spiral band 3 form an insert, which is placed in the outer tube 1, and the same helical segment on the fixed rod 2 is welded with two spiral bands 3 in the same spiral direction, and the spiral band 3 is made of stainless steel with the same material as the fixed rod. , the helical band 3 is a right-handed helical band, the helical angle β=45° with the horizontal direction, and the length L of the helical band 3 1 is the inner diameter of the outer tube 1 D 1 5 times of , the outer diameter D of the fixed rod 3 2 is the inner diameter of the outer tube 1 D 1 0.1 times of , the inner insert formed by the fixed rod ...

Embodiment 3

[0040] A kind of enhanced heat transfer tube, its structure is as image 3 As shown, the heat transfer tube includes an outer tube 1, a fixed rod 2 and a spiral band 3, the outer tube 1 is a cylindrical hollow tube, the fixed rod 2 is a solid metal rod, and the spiral band 3 is welded on the fixed rod 2 in sections to form a spiral section, the fixed rod 2 and the spiral band 3 form an insert, which is placed in the outer tube 1, and the same helical segment on the fixed rod 2 is welded with three spiral bands 3 in the same spiral direction, and the spiral band 3 is made of stainless steel with the same material as the fixed rod. Material, the spiral band 3 is a left-handed spiral band, the spiral angle β=85° with the horizontal direction, and the length L of the spiral band 3 1 is the inner diameter of the outer tube 1 D 1 50 times of , the number of helical segments is 4, and the pitch of helical segments is L 2 is the inner diameter of the outer tube 1 D 1 30 times of , ...

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Abstract

The invention relates to a reinforced heat transfer tube. The heat transfer tube comprises an outer tube, a fixed rod and a helical belt, wherein the outer tube is a column-shaped hollow tube; the fixed rod is a solid metal bar; and the helical belt is welded on the fixed rod to form a plug-in element and be placed into the outer tube. Compared with the prior art, the invention has the advantages of favorable heat transfer effect, low manufacture difficulty, high finished product rate, more reliable structure and flexible application, reduces the volume in the tube by the fixed rod on the premise of not changing the heat exchange area of a heat exchange tube, can increase the specific surface area of the heat exchange tube and is beneficial to the heat exchange of the heat exchange tube.

Description

technical field [0001] The invention relates to a heat transfer tube, in particular to an enhanced heat transfer tube. Background technique [0002] With the aggravation of the energy crisis, the problem of energy saving and consumption reduction of equipment has come to the fore. At present, ethylene cracking furnaces are the largest energy consumers in all ethylene plants. In terms of consumption. To reduce the energy consumption of the ethylene cracking furnace, an effective way is to increase the heat exchange efficiency of the ethylene cracking furnace. Those skilled in the art know that the heat transfer efficiency is related to the specific surface area and thermal resistance of the heat exchange tube. The larger the specific surface area, the higher the heat transfer efficiency; the smaller the thermal resistance, the higher the heat transfer efficiency. [0003] Patent CN1260469A describes a twisted sheet tube with a twist angle of 100-360 degrees and a twist rat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F1/40F28F13/02
Inventor 李保有涂国华刘海军乔亲亲卢永生郭英锋薄建民方守毅冯恩明
Owner WISON ENG
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