Internal combustion segmental heat treatment method for pressure container

Abstract

The invention discloses a segmental heat treatment method for a large-scale pressure container in the manufacturing and mounting field. The method comprises the following steps of: building a heat-treatment underground facility which is lower than the ground in a manufacturing shop for the large-scale pressure container, and mounting a burner used for heating in the heat-treatment underground facility; translating the large-scale pressure container segment to be subjected to heat treatment by a travelling crane in the manufacturing shop so as to vertically mount the large-scale pressure container segment on the heat-treatment underground facility; mounting a heat-insulating furnace shell for heat preservation on the periphery of the large-scale pressure container segment; mounting a temperature-uniformizing device at the top of the heat-insulating furnace shell; and heating the large-scale pressure container segment by the burner so as to realize heat treatment. The segmental heat treatment method solves the technical problem that the large-scale pressure container is susceptible to deformation during the heat treatment through the heat treatment of the vertical large-scale pressure container.

Description

technical field [0001] The invention relates to post-weld heat treatment technology, in particular to a method for performing segmental heat treatment on a large pressure vessel by means of a combustion method at the manufacturing and installation sites. Background technique [0002] Post-weld heat treatment of pressure vessels is the key process in the final stage of pressure vessel manufacturing and installation. 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 mea...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for on-site segmental heat treatment of large pressure vessels by using the combustion method, and solve the problem that large pressure vessels are easily deformed during heat treatment by performing heat treatment on erected large pressure vessel segments

Images