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A high temperature heat exchanger and its manufacturing process

A technology of high-temperature heat exchangers and manufacturing processes, applied in the direction of indirect heat exchangers, heat exchanger types, sustainable manufacturing/processing, etc., can solve problems such as inconsistent thermal expansion coefficients, hidden dangers of equipment, weld corrosion, etc., to meet the requirements of welding Strength requirements, reduce weld lapping, and avoid salt corrosion effects

Active Publication Date: 2022-06-03
LUXI CHEM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the heat exchange medium is high-temperature and high-pressure process gas and deoxygenated water, in the manufacture of traditional high-temperature heat exchangers, the connection method between the heat exchange tube and the tube sheet is generally selected in the way of strength welding + expansion, and the heat exchange equipment operates at high temperature. During the process, due to the difference in the materials of the heat exchange tube and the tube sheet, the thermal expansion coefficients of the materials are inconsistent. During the start-up process, there will be a gap in the expansion joint area between the heat exchange tube and the tube sheet, and deoxygenated water will accumulate in the gap. After high temperature gasification Gradually accumulate salt in the gap, and long-term operation will cause corrosion and leakage of heat exchange tubes and welds in the place where salt accumulates, making the device in hidden danger. If it is not discovered in time, it will cause a vicious accident of high pressure and low pressure

Method used

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  • A high temperature heat exchanger and its manufacturing process
  • A high temperature heat exchanger and its manufacturing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] The production process of a high temperature heat exchanger with a heat exchange tube specification of Ф45×4 and a material of S32168:

[0063] (1) Polish the outer surface of the heat exchange tube in contact with the tube sheet on the heat exchange tube: use a 630 lathe, cooperate with polishing tooling to drive the thousand impeller for polishing, the polishing accuracy Ra is more than 0.8μm, and the size control after polishing is better than the outer surface of the heat exchange tube. The diameter is 0.2mm smaller;

[0064] (2) Spray high temperature anti-corrosion layer on the polished part of the heat exchange tube: spray the high temperature anti-corrosion layer on the front end of the tube sheet of the heat exchange tube, and protect the rest. The surface of the heat exchange tube should be cleaned according to the requirements of the first grade and the surface of the heat exchange tube should be cleaned; the end of the heat exchange tube is sprayed with a sp...

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Abstract

The invention relates to the technical field of heat exchangers, in particular to a high-temperature and high-pressure differential heat exchanger and a manufacturing process thereof. High temperature heat exchanger, including shell, heat exchange tube and tube sheet, high temperature resistant anti-corrosion layer and high temperature film tape are added between the contact surface of heat exchange tube and tube sheet, heat insulation sleeve is installed inside the heat exchange tube, heat insulation sleeve The surface is provided with high temperature film tape. And provide a high-temperature heat exchanger manufacturing process, through the improvement of the high-temperature heat exchanger structure and its manufacturing process, effectively solve the problem of corrosion at the end of the heat exchange tube, avoiding the shutdown of the entire device due to heat exchanger leakage, It meets the requirements of long-term stable operation of the device.

Description

technical field [0001] The invention relates to the technical field of heat exchangers, in particular to a high temperature and high pressure difference heat exchanger and a manufacturing process thereof. Background technique [0002] The information disclosed in this Background section is only for enhancement of understanding of the general background of the invention and should not necessarily be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. [0003] In chemical production, high temperature heat exchanger is an important equipment for cooling and heat exchange of high temperature gas or liquid. Through the recovery and conversion of heat, the energy efficiency balance of the device is effectively guaranteed. Since the heat exchange medium is high temperature and high pressure process gas and deoxidized water, in the production of traditional high temperature heat exch...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D7/16F28F19/00F28F19/02F28F27/00B23P15/26
CPCF28D7/16F28F19/002F28F19/02F28F27/00B23P15/26Y02P20/10
Inventor 王延吉甄立民郭保方王培锋高希改姚传滨
Owner LUXI CHEM GRP
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