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Heat exchanger with twisted sheet

A twisted sheet and heat exchanger technology, applied in the field of heat exchangers, can solve the problems of high cost and difficulty in processing and manufacturing, and achieve the effects of reducing the rate of fouling, thinning the original boundary layer, and intensifying the severity.

Inactive Publication Date: 2010-09-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many types of enhanced heat transfer technologies for tubular heat exchangers, and they are widely used, these existing technologies also face some confusion. The main processing and manufacturing difficulties are high, and the cost is high. At the same time, long-term operation is also a bottleneck.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In this embodiment, the tube-and-tube heat exchanger is taken as an example. figure 2 It is a simplified schematic diagram of the shell and tube heat exchanger. Tube and tube heat exchanger is currently the most widely used heat transfer equipment in chemical production. The main advantage is that the heat transfer area per unit volume is large and the heat transfer effect is good; The advantages of large operating flexibility.

[0031] Next, select one section of the heat exchanger for calculation, its size and parameters are shown in Table 1, and the process parameters are shown in Table 2.

[0032] Table 1 Structural diagram of shell and tube heat exchanger

[0033]

[0034] Set or not set the twisted sheet in the heat exchange tube of the shell and tube heat exchanger, and carry out the heat transfer calculation of the two cases, and the calculation results are shown in Table 2:

[0035] Table 2 Process parameters of shell and tube heat exchanger

[0036] ...

Embodiment 2

[0038] This embodiment takes the coiled tube heat exchanger as an example, image 3 It is a simple structural diagram of a coiled tube heat exchanger. As the name suggests, the snake-tube heat exchanger is made of bent metal pipes, which resembles a snake. The advantages of this type of heat exchanger are simple structure, low price, easy corrosion resistance, and ability to withstand high pressure. Next, select a part of the tube section for calculation, its size and parameters are shown in Table 3, and the process parameters are shown in Table 4.

[0039] Table 3 Structural diagram of coiled tube heat exchanger

[0040] project

content

Remark

Tube length (mm)

9128.4

steel material

Tube inner diameter (mm)

40

Tube wall thickness (mm)

5

Number of heat exchanger positions

3

Twist Ratio of Heat Exchanger

2.5

Twist angle of heat exchanger

180°

[0041] ...

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Abstract

The invention discloses a heat exchanger with a twisted sheet. In order to overcome the limitation of a traditional enhanced heat transfer technology of a tubular heat exchanger, the twisted sheet is adopted by the invention and welded in the heat exchange tube of the heat exchanger, thereby improving the heat transfer effect of the heat exchanger and prolonging the operation cycle of the heat exchanger.

Description

technical field [0001] The present invention relates to a heat exchanger, more particularly, the present invention relates to a heat transfer enhanced heat exchanger. Background technique [0002] A heat exchanger is a heat transfer device that transfers internal heat when there is a temperature difference between two or more fluids. Most of the fluids inside a heat exchanger are separated by heat transfer surfaces. Heat exchangers are widely used in process, energy, petroleum, transportation, air conditioning, refrigeration, cryogenics, heat recovery, alternative fuels, and other industries. Heat exchangers can be found everywhere in people's daily life, such as car radiators, condensers, evaporators, air preheaters and oil coolers. [0003] There are many types of heat exchangers. According to different structures, heat exchangers can be divided into tube heat exchangers, plate heat exchangers, extended surface heat exchangers and regenerators. Tubular heat exchangers in...

Claims

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Application Information

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IPC IPC(8): F28D7/10F28D7/16F28D1/047F28F13/02F28F13/12
CPCF28F13/12
Inventor 王国清张利军周先锋张兆斌杜志国周丛刘俊杰
Owner CHINA PETROLEUM & CHEM CORP
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