Heat treatment process of hydrogenation reaction kettle

Abstract

The invention discloses a heat treatment process of a hydrogenation reaction kettle producing various chemical industry raw materials with a continuous hydrogenation method, which eliminates various stresses generated in the production process of the reaction kettle by the heat treatment process, improves the quality of the reaction kettle and further increases the service life of the reaction kettle. A welding test panel is thermally treated along with the furnace so as to ensure the welding consistency of the test panel and the reaction kettle and guarantee the various data checked by the test panel to accurately reflect the reaction kettle welding and the heat treatment quality. The heat treatment process can be not only applied to various hydrogenation reaction kettles, but also to other reaction kettles and products welded with thick wall.

Description

technical field [0001] The invention relates to a pressure vessel, in particular to a reactor heat treatment technology for producing various chemical raw materials by continuous hydrogenation. Background technique [0002] With the continuous advancement of science and technology, sorbitol, xylitol, maltitol and furfuryl alcohol and other products required by chemical and pharmaceutical industries are produced by continuous hydrogenation method, which is the most core equipment in the production of such products It is the hydrogenation reactor. At the same time, in order to increase the production capacity, the manufacturer requires the volume of the reactor to be larger and larger, and the largest must reach 30m 3 In the production process, the working pressure is required to reach 10-13MPa, and the working temperature is 150-200°C. Therefore, although the reaction kettle with carbon steel and enamel structure can meet the requirements of pressure and working temperature, ...

AI Technical Summary

Problems solved by technology

[0002] With the continuous advancement of science and technology, sorbitol, xylitol, maltitol and furfuryl alcohol and other products required by chemical and pharmaceutical industries are produced by continuous hydrogenation method, which is the most core equipment in the production of such products It is the hydrogenation reactor. At the same time, in order to increase the production capacity, the manufacturer requires the volume of the reactor to be larger and larger, and the largest must reach 30m 3 In the production process, the working pressure is required to reach 10-13MPa, and the working temperature is 150-200°C. Therefore, although the reaction kettle with carbon steel and enamel structure can meet the requirements of pressure and working temperature, its corrosion resistance cannot meet the requirements. Production requirements; if the reactor is all made of stainless steel, although it can meet the requirements of corrosion resistance and working temperature, its working pressure cannot meet the requirements. In order to make the pressure meet the design requirements, if the volume of the reactor reaches 30m 3 , the thickness of the reactor cylinder must reach more than 100mm, so that its cost will be greatly increased, which is more than three times that of ordinary carbon steel, and ordinary manufacturers cannot accept it.

For this reason, the domestic hydrogenation reactor cylinder adopts the composite method of carbon steel and stainless steel. Since the thickness of the cylinder reaches more than 100mm, and the materials of carbon steel and stainless steel are different, the welding of the cylinder, the welding of the cylinder and the head, and the cylinder Welding various pipelines on the body and head will generate a lot of stress, which will seriously affect the quality of the reactor. The reactor is used under high temperature and high pressure. Once the stress occurs in a certain link Concentration will soon lead to cracks or explosions. On the one hand, the service life of the reactor is reduced, and on the other hand, it seriously affects the safe production of the enterprise.