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Piecewise heat treatment method of large pressure container

A heat treatment method and pressure vessel technology, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve problems such as easy deformation of large pressure vessels, achieve good heat treatment effects, avoid deformation defects, and improve heat treatment speed.

Inactive Publication Date: 2011-09-28
傅家仁 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a method for segmental heat treatment of a large pressure vessel. By setting the pressure vessel segment that needs to be heat treated as a furnace, the process of heat treatment is simplified, thereby improving the efficiency of segmental heat treatment; in addition, by The vertical pressure vessel section is heat treated to solve the problem of easy deformation of large pressure vessels during heat treatment

Method used

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  • Piecewise heat treatment method of large pressure container
  • Piecewise heat treatment method of large pressure container
  • Piecewise heat treatment method of large pressure container

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Embodiment Construction

[0034] The large pressure vessel of the present invention refers to an integral pressure vessel that cannot be transported on roads, and the diameter of such a pressure vessel is usually equal to or greater than 4 meters.

[0035] figure 2 The staged heat treatment method of a large pressure vessel of the present invention is shown. Due to the large size of large pressure vessels, manufacturing plants usually build large pressure vessels in sections, and then transport the sections of the sectioned pressure vessels to the installation site. Since each section of a large pressure vessel is a circular cylinder, for the sake of convenience of description, the present invention refers to a section of a large pressure vessel as a pressure vessel section (or pressure vessel cylinder) 3 .

[0036] like figure 2 Shown, the staged heat treatment method of large pressure vessel of the present invention comprises the following steps:

[0037] Construction of a temporary firing furna...

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Abstract

The invention discloses a piecewise heat treatment method of a large pressure container, which comprises the following steps: building a temporary combustion heating furnace near an installation site of the large pressure container; vertically installing the pressure container section into the combustion heating furnace, setting an inner cavity of the pressure container section into a hearth; butting a combustor with the bottom of the pressure container section; and combusting and heating the pressure container section by using the combustor. Compared with the traditional method for heat treatment by using an industrial furnace, the invention can improve the heat treatment speed to the pressure container section by building the temporary combustion heating furnace to perform the piecewiseheat treatment on the pressure container section.

Description

technical field [0001] The invention relates to a post-weld heat treatment technology, in particular to a segmental heat treatment method for a large pressure vessel. Background technique [0002] Post-weld heat treatment of pressure vessels is a key process in the final stage of pressure vessel manufacturing. The quality of post-weld heat treatment directly affects the overall internal quality of the pressure vessel. Unlike weld defects, post-weld heat treatment cannot be reworked, and heat treatment takes a long time and costs a lot. The effect of post-weld heat treatment is guaranteed by the post-weld heat treatment process. Therefore, the faithful execution of post-weld heat treatment process is the key to ensure the effect of post-weld heat treatment. The uniformity of heat treatment temperature, the rationality of holding time, and the accuracy of temperature measurement are all key. For large pressure vessels (such as towers in petroleum and chemical plants), after ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/00C21D1/00
Inventor 傅家仁傅敏杰
Owner 傅家仁
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