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Heat treating method for large-scale device integral anneal

A heat treatment method and large-scale equipment technology, applied in heat treatment furnaces, heat treatment equipment, heat treatment process control, etc., can solve problems such as narrow application areas and inability to solve large-scale equipment heat treatment problems, and achieve the effect of reducing welding residual stress

Inactive Publication Date: 2008-03-26
贵阳白云铝工业设备制造厂
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  • Abstract
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Problems solved by technology

These methods all have a certain overall annealing effect, but these methods have narrow application areas and cannot solve the heat treatment problem of overall annealing of large equipment.

Method used

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  • Heat treating method for large-scale device integral anneal

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Embodiment 1

[0015] Embodiment 1: In July 2007, the self-evaporator of ф4000×9000mm manufactured by Guiyang Baiyun Aluminum Industrial Equipment Manufacturing Plant was subjected to overall annealing treatment by the method of the present invention, as shown in Figure 1. The process is as follows:

[0016] The first step is to arrange the electric heating plate: inside the evaporator shell 3, the electric heating plate 1 is arranged in a stepwise manner according to its shape,

[0017] The second step is to establish a temperature control system: connect the electric heating plate 1 arranged in the previous step with the connecting wire 8, first connect it inside the device separately, and then connect it outside the device after checking it is correct, and finally connect it to the temperature control system through the interface converter 5 Box 6; then arrange the thermocouple thermometer 2, and connect it to the temperature control box 6 with a data line to build a temperature control sy...

Embodiment 2

[0020] Example 2 In April 2007, the on-site assembled chemical cleaning tank with a volume of ф6000×6000 was subjected to overall annealing heat treatment in the alumina plant of Chalco Guizhou Branch, as shown in Figure 2, and the process was the same as in Example 1.

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Abstract

The heat treatment process for annealing large apparatus integrally includes the following steps: 1. arranging heating plates inside the large apparatus; 2. connecting the heating plates through a interface converter to a temperature control system comprising temperature control box and temperature measuring thermocouples; 3. coating the outside of the apparatus with heat insulating material; and 4. heating homogeneously in the controlled temperature raising rate, maintaining for required time, lowering the temperature slowly to anneal and eliminate stress and powering off. The present invention is suitable for annealing large apparatus integrally.

Description

technical field [0001] The present invention is related to the electric heating method, also related to the annealing technology, especially related to the heat treatment method of the overall annealing of large-scale equipment. Background technique [0002] As we all know, the welding stress generated in the process of equipment manufacturing or repair must be eliminated by annealing heat treatment, otherwise it will affect the service life of the equipment. At present, the overall annealing heat treatment is mostly realized by a large oil furnace or a large electric furnace. However, the cost of large-scale heating furnaces is high and the utilization rate is low, so many enterprises cannot afford to build them. Moreover, large heating furnaces cannot perform overall annealing of equipment in use. For this reason, people have successfully researched some annealing heat treatment technologies, such as Chinese patent application No. 99112345.X "On-line continuous bright an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/00C21D1/26C21D1/40C21D11/00
Inventor 江泉罗淑平陈勤发汪亚平郭毅
Owner 贵阳白云铝工业设备制造厂
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