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Heat exchanger and heat exchange method

A technology of heat exchanger and heat method, applied in the direction of indirect heat exchanger, heat exchanger type, heat transfer modification, etc., can solve the problems of affecting heat exchange efficiency, small flow rate, easy to cause fouling, etc., and achieve improved heat transfer Effects of thermal performance, increased flushing force, and small specific gravity

Inactive Publication Date: 2018-09-25
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a heat exchanger and a heat exchange method, which are used to solve the problem of low material flow rate near the tube wall in the prior art, which easily causes fouling and affects the heat exchange efficiency. The problem

Method used

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  • Heat exchanger and heat exchange method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Such as Figure 1 ~ Figure 3 As shown, this embodiment provides a heat exchanger, the heat exchanger at least includes:

[0055] Shell 1 , head 2 , base 7 , heat exchange tube 8 .

[0056] Such as figure 1 As shown, the housing 1 is a barrel-shaped structure with both ends open. In this embodiment, the housing 1 is a cylindrical structure, and the diameter of the housing 1 is D1. The housing 1 is arranged laterally on the base 7, the upper surface of the base 7 is an arc-shaped structure, which fits with the arc-shaped surface of the housing 1, and the lower surface of the base 7 is a plane , used to support the housing 1 to keep the housing 1 stable.

[0057] Such as figure 1 As shown, the two ends of the housing 1 are connected to the sealing head 2 to form a closed space. In this embodiment, the sealing head 2 is an arc-shaped surface protruding outward. The shell 1 is provided with a material inlet 3 , a heat exchange medium outlet 4 , a material outlet 5 and a...

Embodiment 2

[0065] This embodiment provides a heat exchanger, the structure of the heat exchanger is similar to the first embodiment, the difference is that the size of the heat exchange tubes in this embodiment is different from the size of the heat exchange tubes in the first embodiment .

[0066] Specifically, the inner wall of the heat exchange tube 8 is provided with a screw thread 10, the pitch L of the screw thread 10 is 30 mm, and the groove depth H is 0.9 mm. The ratio of the helical diameter D2 of 8 was set to 0.18. The heat exchanger of this embodiment can also achieve the purpose of anti-fouling.

Embodiment 3

[0068] This embodiment provides a heat exchanger, the structure of the heat exchanger is similar to the first embodiment, the difference is that the size of the heat exchange tubes in this embodiment is different from the size of the heat exchange tubes in the first embodiment .

[0069] Specifically, the inner wall of the heat exchange tube 8 is provided with a screw thread 10, the pitch L of the screw thread 10 is 30 mm, and the groove depth H is 1.0 mm. The ratio of the helical diameter D2 of 8 was set to 0.2. The heat exchanger of this embodiment can also achieve the purpose of anti-fouling.

[0070] The purpose of anti-fouling can be achieved by different combinations of thread pitch L, groove depth H, and ratio of heat exchange tube diameter D3 to screw diameter D2 within the set range, and will not be listed here.

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Abstract

The invention provides a heat exchanger and a heat exchange method. The heat exchanger comprises a shell, a shell cover and a heat exchange pipe, wherein the shell and the shell cover form a closed space, the heat exchange pipe is arranged in the shell, and a thread is arranged on the inner wall of the heat exchange pipe. A heat exchange medium enters the shell through a heat exchange medium inlet, and flows out of the shell through a heat exchange medium outlet; a material enters the heat exchange pipe in the shell through a material inlet, and flows out of the heat exchange pipe through a material outlet; energy of the material and energy of the heat exchange medium are exchanged through the pipe wall of the heat exchange pipe, the flow speed of the material is gradually increased from the center to the inner wall of the heat exchange pipe, and the inner wall of the heat exchange pipe is prevented from scaling. In the heat exchanger, the threaded screw heat exchange pipe is adopted,the scouring force of the material to the pipe wall is greatly increased, and condensation and scaling are prevented from being generated on the pipe wall; through optimization of the size of the heatexchange pipe, the balance between scaling and energy saving is achieved; the heat exchange pipe is prepared from aluminum-based alloy containing nano graphene, the heat transfer performance is high,the heat exchange pipe has corrosion resistance, the application range is wide, the specific gravity is low, and the weight is low.

Description

technical field [0001] The invention relates to the field of heat exchangers, in particular to a heat exchanger and a heat exchange method. Background technique [0002] A heat exchanger is a device that transfers part of the heat of the heating medium to the refrigerant, also known as a heat exchanger. Heat exchangers play an important role in chemical, petroleum, pharmaceutical, power, food, energy and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc. ,Wide range of applications. [0003] A common problem in heat exchangers in the prior art is that materials are prone to fouling on tube walls, and once fouling occurs, the heat exchange efficiency of the heat exchanger will be seriously affected. Regarding the fouling problem, the material flow rate is one of the more important factors. The straight tubes and spiral tubes commonly used in existing heat exchangers are smoo...

Claims

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Application Information

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IPC IPC(8): F28F13/12F28F19/00F28D7/02C22C21/14C22C21/16C22C21/02C22C21/00C22C32/00
CPCF28F13/12C22C21/00C22C21/02C22C21/14C22C21/16C22C32/0084F28D7/024F28F19/00
Inventor 刘彦孔巧玲黄伟光
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI