PWHT (postweld heat treatment) device for mounting utility boiler water wall

A technology for post-weld heat treatment and power plant boilers, which is applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve the problems of increasing the difficulty of fixing and heater fixing, and achieves the effect of effective local heat treatment

Active Publication Date: 2015-04-29
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is very difficult to fix the heater of the heat treatment device without destroying the integrity and sealing of the water wall, and heat sources must be arranged on both sides for heat treatment, which further increases the difficulty of fixing

Method used

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  • PWHT (postweld heat treatment) device for mounting utility boiler water wall
  • PWHT (postweld heat treatment) device for mounting utility boiler water wall
  • PWHT (postweld heat treatment) device for mounting utility boiler water wall

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Embodiment

[0019] First, introduce the specific structure of the present invention. The present invention includes a thermal insulation cotton fixing plate 2 provided with thermal insulation cotton 1, a heating assembly arranged on the lower end surface of the thermal insulation cotton fixing plate 2, and a heating assembly arranged on the upper end surface of the thermal insulation cotton fixing plate 2 for The heating plate fixing plate 3 for fixing the heating assembly, and the adsorption component arranged on the heating plate fixing plate 3 for adjusting the adsorption strength of the device.

[0020] Considering that the water-cooled wall dissipates heat quickly during heat treatment, it not only causes waste of energy, but also causes excessive temperature gradient near the weld. Utilizing the good flexibility and heat insulation performance of thermal insulation cotton, it can be attached to the uneven surface of the water-cooled wall under the action of pressure. Therefore, this ...

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Abstract

The invention relates to a heat treatment device, in particular to a PWHT device for mounting a utility boiler water wall. The PWHT device comprises an insulation cotton fixing plate provided with insulation cotton, a heating component arranged on the lower end surface of the insulation cotton fixing plate, a heating plate fixing plate used for fixing the heating component and arranged on the upper end surface of the insulation cotton fixing plate, and an absorption component used for adjusting the absorption strength of the device and arranged on the heating plate fixing plate. Therefore, the PWHT device for mounting the utility boiler water wall has the advantage of being capable of performing local heat treatment on a welded joint of the water wall quickly, conveniently and effectively.

Description

technical field [0001] The invention relates to a heat treatment device, in particular to a post-weld heat treatment device for installing a water-cooled wall of a power station boiler. Background technique [0002] Power plant boilers are developing in the direction of large capacity and high parameters, and efficient and clean ultra-supercritical boilers are gradually replacing traditional subcritical boilers. The continuous improvement of working medium parameters, pressure and temperature puts forward high requirements for water-cooled wall components. It is necessary to increase the wall thickness of the tube, or use new low-alloy heat-resistant steel with high strength, such as T23, T24 and other materials, or even T91 , T92 and other martensitic heat-resistant steel. In order to reduce the welding residual stress and improve the performance of the joint, post-weld heat treatment must be performed on the welded joints installed on the water wall. The post-weld heat t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/50
Inventor 王学耿韶宁
Owner WUHAN UNIV
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