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Method for producing machining type impregnated graphite tube

A technology of impregnated graphite and production method, which is applied in the production field of processed impregnated graphite tubes, can solve the problems of easy failure of equipment, short service life, low yield rate, etc., and achieve the effects of saving energy, reducing consumption, and shortening the cycle

Active Publication Date: 2011-01-05
NANTONG JINGTONG GRAPHITE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional production method of impregnated graphite tubes is produced by mixing materials, extruding, roasting, impregnating, processing and other processes. The yield is low, the energy consumption is high, the operating environment is poor, and the pollution to the environment is very serious. The graphite tubes obtained The strength is low, the service life is short, and it cannot be used in high temperature and high pressure conditions. It is used to make high temperature heat exchanger equipment, which is prone to failure and cannot be used normally.
[0003] The publication number is CN101186523A, the publication date is May 28, 2008, and the name is the production method of impregnated graphite tube, which discloses a production method of impregnated graphite tube, which mixes graphite powder and pitch according to a certain ratio, and puts It is extruded in a molding die, then roasted and impregnated to obtain a finished product. The purpose is to obtain a graphite tube with no bubbles, cracks, etc., long service life, and no bursting, etc., but the processing cycle is longer.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A production method for processed impregnated graphite tubes, comprising the following steps:

[0028] Graphite raw materials; choose block graphite raw materials with different shapes, such as rectangle, cylinder or tubular profiles, and the length is determined according to the processing requirements.

[0029] Raw material processing: The graphite raw material is processed according to the required pipe specifications, and the machine tool is processed into a pipe shape with a certain wall thickness, the wall thickness is 4mm, and the length is 1000mm.

[0030] Drying: Hold the processed tube with a bracket, place it in an oven for drying, and raise the temperature according to the heating curve (heating rate 6°C / h), the drying time is 28 hours, and the drying temperature is 120°C.

[0031] Resin impregnation: transfer the dried pipe to the impregnation kettle, and impregnate it with phenolic resin to make it have certain strength and compactness.

[0032] The macer...

Embodiment 2

[0041] A production method for processed impregnated graphite tubes, comprising the following steps:

[0042] Graphite raw materials; choose block graphite raw materials with different shapes, such as rectangular or cylindrical or tubular profiles, and the length is determined according to processing requirements.

[0043] Raw material processing: The graphite raw material is processed according to the required pipe specifications, and the machine tool is processed into a pipe shape with a certain wall thickness, the wall thickness is 10mm, and the length is 500mm.

[0044] Drying: Hold the processed tubes with a bracket, place them in an oven for drying, and raise the temperature according to the heating curve (heating rate 5°C / h), the drying time is 30 hours, and the drying temperature is greater than 150°C.

[0045] Resin impregnation: transfer the dried pipe to the impregnation kettle, and impregnate it with phenolic resin to make it have certain strength and compactness. ...

Embodiment 3

[0055] A production method for processed impregnated graphite tubes, comprising the following steps:

[0056] Graphite raw materials; choose block graphite raw materials with different shapes, such as rectangular or cylindrical or tubular profiles, and the length is determined according to processing requirements.

[0057] Raw material processing: The graphite raw material is processed according to the required pipe specifications, and the machine tool is processed into a pipe shape with a certain wall thickness, the wall thickness is 6mm, and the length is 1500mm.

[0058] Drying: Hold the processed tube with a bracket, place it in an oven for drying, and raise the temperature according to the heating curve (heating rate 8°C / h), drying time is 30 hours, and the drying temperature is 170°C.

[0059] Resin impregnation: transfer the dried pipe to the impregnation kettle, and impregnate it with phenolic resin to make it have certain strength and compactness.

[0060] The macera...

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Abstract

The invention relates to a method for producing a machining type impregnated graphite tube, which comprises the steps of: processing blocky graphite raw materials in different shapes into a pipe shape; drying; impregnating; curing at high temperature; processing a pipe material; connecting, and the like. Processes of mixing, extruding, and the like are not used, pipe materials meeting the requirements for manufacturing various graphite tube exchangers are produced; meanwhile, the manufactured graphite tube has high hardness and large strength, and threads can be processed at the end part of the manufactured graphite tube; the graphite tubes are connected together by combining a connecting mode of internal and external threads with a mode of bonding agent, which avoids the problem that thegraphite tube leaks water after used for a period of time.

Description

technical field [0001] The invention relates to a production method of a processed impregnated graphite tube. Background technique [0002] The traditional production method of impregnated graphite tubes is produced by mixing materials, extruding, roasting, impregnating, processing and other processes. The yield is low, the energy consumption is high, the operating environment is poor, and the pollution to the environment is very serious. The graphite tubes obtained The strength is low, the service life is short, and it cannot be used in high temperature and high pressure conditions. It is used to make high temperature heat exchanger equipment, which is prone to failure and cannot be used normally. [0003] The publication number is CN101186523A, the publication date is May 28, 2008, and the name is the production method of impregnated graphite tube, which discloses a production method of impregnated graphite tube, which mixes graphite powder and pitch according to a certain...

Claims

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Application Information

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IPC IPC(8): C04B41/48
Inventor 陈汉明陈汉军吴栋梁陈玉培杨钧张茂海
Owner NANTONG JINGTONG GRAPHITE EQUIP
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