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Heat exchange pipe of heat exchanger and heat exchanger adopting heat exchange pipe

A technology of heat exchange tubes and heat exchangers, which is applied in the field of reactor engineering, can solve problems such as inapplicability, and achieve the effects of improving service life, reducing the number of occurrences, and avoiding cracking

Pending Publication Date: 2018-12-18
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the basic structure of the intermediate heat exchanger, other solutions such as hockey tubes and bellows are not applicable

Method used

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  • Heat exchange pipe of heat exchanger and heat exchanger adopting heat exchange pipe
  • Heat exchange pipe of heat exchanger and heat exchanger adopting heat exchange pipe
  • Heat exchange pipe of heat exchanger and heat exchanger adopting heat exchange pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The working condition of the heat exchanger is that the inlet and outlet temperatures of the primary side are 516°C and 353°C. The inlet and outlet temperatures of the secondary side are 310°C and 495°C;

[0034] The heat exchanger adopts the heat exchange tube with the above structure. The material of the heat exchange tube is 304 stainless steel. The specification of the heat exchange tube is φ16×1.4. The length of the first straight pipe section is 1300mm, the length of the second straight pipe section is 1900mm, and the length of the middle straight pipe section is 100mm. The bending radius of the joint of the corresponding space spiral elbow section is 100mm, and the center distance of the heat exchange tubes is arranged equally from the innermost layer of 133.5mm to the outermost layer of 305.5mm; the first and second space spiral elbow sections of the nine-layer heat exchange tube The central angles from inside to outside are: 90°, 78°, 68.5°, 61°, 55°, 50°, 46°...

Embodiment 2

[0038] Present embodiment adopts the same device of embodiment 1, and its difference is:

[0039] The working condition of the heat exchanger is that the inlet and outlet temperatures of the primary side are 516°C and 353°C. The inlet and outlet temperatures of the secondary side are 310°C and 495°C;

[0040] The heat exchanger adopts the heat exchange tube with the above structure. The material of the heat exchange tube is 304h stainless steel. The specification of the heat exchange tube is φ14×1.2. The length of the first straight pipe section is 1700mm, the length of the second straight pipe section is 3000mm, and the length of the middle straight pipe section is 80mm. The bending radius of the joint of the spiral elbow section in the corresponding space is 90mm, and the center distance of the heat exchange tubes is arranged equally from the innermost layer of 300mm to the outermost layer of 500mm; the centers of the first and second space spiral elbow sections of the nine...

Embodiment 3

[0044] Present embodiment adopts the same device of embodiment 1, and its difference is:

[0045] The working condition of the heat exchanger is that the inlet and outlet temperatures of the primary side are 516°C and 353°C. The inlet and outlet temperatures of the secondary side are 310°C and 495°C;

[0046]The heat exchanger adopts the heat exchange tube with the above structure. The material of the heat exchange tube is 316 stainless steel. The specification of the heat exchange tube is φ16×1.2. The length of the first straight pipe section is 2100mm, the length of the second straight pipe section is 1700mm, and the length of the middle straight pipe section is 70mm. The bending radius of the joint of the spiral elbow section in the corresponding space is 130mm, and the center distance of the heat exchange tubes is arranged equally from the innermost layer of 500mm to the outermost layer of 700mm; the centers of the first and second space spiral elbow sections of the nine-...

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Abstract

The invention belongs to the field of reactor engineering, and particularly relates to a heat exchange pipe of a heat exchanger and a heat exchanger adopting the heat exchange pipe. A space spiral structure is adopted in the heat exchange pipe adopts, and the heat exchange pipe includes a first straight pipe section, a first space spiral bent pipe section, a middle straight pipe section, a secondspace spiral bent pipe section and a second straight pipe section. One end of the first straight pipe section is fixedly connected to an upper pipe plate, the first straight pipe section, the first space spiral bent pipe section, the middle straight pipe section, the second space spiral bent pipe section and the second straight pipe section are fixedly connected in sequence, and the second straight pipe section is fixedly connected to a lower pipe plate. According to the heat exchange pipe and the heat exchanger adopting the heat exchange pipe, the heat exchange pipe solves the problem of thermal stress of the heat exchanger caused by thermal expansion difference.

Description

technical field [0001] The disclosure belongs to the field of reactor engineering, and in particular relates to a heat exchange tube of a heat exchanger and a heat exchanger using the heat exchange tube. Background technique [0002] The intermediate heat exchanger is the heat exchange equipment that connects the primary and secondary circuits of the main heat transfer system of the pool-type sodium-cooled fast reactor. Sodium coolant is introduced and exported coaxially (central downcomer) in the intermediate heat exchanger. Such a structure determines that the heat exchange tube bundles of the intermediate heat exchanger are arranged in concentric circles. [0003] Due to the large number of heat exchange tube bundles in large heat exchangers in nuclear power plants, the temperature of different parts in the heat exchange area is inconsistent. Large differential thermal expansion. Due to the existence of thermal expansion difference, unacceptable thermal stress will be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D7/02F28F1/36
CPCF28D7/02F28F1/36
Inventor 宋广懂余华金杨红义申凤阳张振兴彭康玮
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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