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Fixed-tubesheet prestressed heat exchanger with external guide shell and treatment method thereof

A technology of fixed tube-sheet type and external guide tube, applied in the direction of heat exchanger shell, indirect heat exchanger, heat exchanger type, etc., can solve the problems of large residual stress of the shell, complicated manufacturing process, etc., and reduce heat transfer Effect of dead zone, improvement of stress state, and improvement of stress state

Inactive Publication Date: 2011-04-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a common feature in the above three patents, that is, a girth weld needs to be reserved on the shell, which not only complicates the manufacturing process, but also produces a large residual stress on the shell after the girth weld is welded. so that it may completely offset the original prestress

Method used

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  • Fixed-tubesheet prestressed heat exchanger with external guide shell and treatment method thereof
  • Fixed-tubesheet prestressed heat exchanger with external guide shell and treatment method thereof
  • Fixed-tubesheet prestressed heat exchanger with external guide shell and treatment method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] In this embodiment, a fixed tube-sheet type prestressed heat exchanger with an external guide tube has a structure such as figure 1 As shown, it includes a shell 5, a tube plate 1 arranged at both ends of the shell and a tube box 6, a heat exchange tube 3 connecting the tube plates 1 at both ends of the shell 5, a baffle assembly inside the shell 5, and a The support 7 supporting the heat exchanger, and the tube boxes 6 at both ends of the shell 5 are respectively arranged on the outside of the tube sheet 1, wherein the shell 5 has at least one prestressed outer guide tube 2, and the outer guide tube 2 Set at the inlet port 9 or outlet port 10 of the shell side of the heat exchanger.

[0036] The outer guide tube 2 is a cylindrical structure with a positive ring shell 11 and a negative ring shell 12 respectively on both sides, such as Figure 4 As shown, the positive ring housing 11 is connected to the negative ring housing 12 , and the negative ring housing 12 is conn...

Embodiment 2

[0049] This embodiment is a fixed tube-sheet prestressed heat exchanger with an external guide tube, the structure of which is the same as that of Embodiment 1.

[0050] This embodiment is used for the treatment method of the above-mentioned fixed tube-sheet prestressed heat exchanger with an external guide tube, including the following steps:

[0051] (1) After forming the housing 5 with the outer guide tube 2, the baffle assembly is installed inside the housing 5 of the heat exchanger, and one end of the heat exchange tube 3 is welded to the tube plate 1 at one end of the housing 5, Then the tube sheets 1 at both ends of the shell 5 are respectively welded tightly on the shell 5;

[0052] (2) if Figure 5 As shown, multiple bundles of steel wire ropes 15 are respectively connected to the flange structure of the tube plate 1 at both ends of the housing 5, and the other ends of the steel wire ropes 15 are crossed and connected to the hoist 16 at the other end of the housing 5...

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Abstract

The invention provides a fixed tubesheet prestressed heat exchanger with an external guide shell and a treatment method thereof. The heat exchanger comprises a housing, tubesheets and tube chambers arranged at two ends of the housing, a heat-exchange tube connecting the tubesheets at two ends, a baffling component arranged in the housing and a support for supporting the heat exchanger; the tube chambers at two ends of the housing are arranged outside the tubesheet; and the housing is at least provided with an external guide shell treated with prestress arranged at the inlet or outlet end of the shell side of the heat exchanger. The treatment method comprises the following steps: firstly, welding one end of the heat-exchange tube on the tubesheet at one end of the housing and mounting the baffling component after the housing with the external guide shell is formed; then, applying prestress on the housing until the pre-deformation of the external guide shell reaches a predetermined value; finally, mounting the tube chambers at two ends of the housing. The external guide shell of the invention can improve the processing capacity of the heat exchanger and prevent the fluid at the inlet from striking the heat-exchange tube, thereby ensuring the even distribution of the fluid; and the external guide shell can facilitate the pre-stressing treatment, thereby reducing pressure and temperature stress under the operating condition of the heat exchanger and improving the reliability.

Description

technical field [0001] The invention relates to the technical field of heat exchangers, in particular to a fixed tube-sheet prestressed heat exchanger with an outer guide tube and a processing method thereof. Background technique [0002] Heat exchangers are heat exchange equipment widely used in the national economy and industrial production. Among various types of heat exchangers, shell-and-tube heat exchangers are widely used due to their simple structure, reliable use, and convenient manufacture. Among them, the fixed tube-sheet heat exchanger is the most widely used, but the biggest weakness of the fixed tube-sheet heat exchanger is when the pressure difference and temperature difference between the tube side and the shell side are large, or when the tube and shell material When the linear expansion coefficients of the tube and the shell are inconsistent due to the difference, the deformation of the tube and the shell is often inconsistent, resulting in the tube being p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D7/16F28F9/22F28F9/24B23K37/00
Inventor 江楠乔竞冯毅
Owner SOUTH CHINA UNIV OF TECH
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