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Welding process of hydrogenation reaction kettle cylinder body

A hydrogenation reactor and welding process technology, applied in the field of pressure vessels, can solve the problems of different properties of low-alloy steel and stainless steel materials, and easy occurrence of welding cracks, so as to improve the fusion quality and prevent welding cracks

Inactive Publication Date: 2009-11-18
倪加明
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Problems solved by technology

[0003] The purpose of the present invention is to provide a welding process for hydrogenation reactor cylinder, which welds and processes the composite plates made of low-alloy steel and stainless steel into a cylindrical shape by explosive technology, so as to solve the problem of the difference in material properties between low-alloy steel and stainless steel Welding between low-thickness alloy steels is prone to welding cracks and other phenomena

Method used

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  • Welding process of hydrogenation reaction kettle cylinder body

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Embodiment Construction

[0022] From figure 1 It can be seen from the figure that a welding process for hydrogenation reactor cylinder: first, roll the explosively composited plate of 00Cr17Ni14Mo2 stainless steel 1 and 16MnR carbon steel 3 into the required cylinder shape, and sequentially spot-fix at the front end of the required welding position. The arc starting plate and the test plate are fixed at the end of the arc extinguishing plate, and the oil, rust, scale and other harmful impurities within the range of 18-22mm on both sides of the welding groove of the vertical and circular edges to be welded are cleaned; The required welding rods are dried: J507 and HJ350 are dried at 340-360°C and kept for 2 hours, and A042 and A022 are dried at 140-160°C and kept for 1 hour.

[0023] Preheat the required welding parts to not less than 150°C, and perform tack welding. J507 electrode is used for tack welding, welding current is 150-170A, arc voltage is 23-24V, and welding speed is 15-18cm / min; the assemb...

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Abstract

The invention discloses a welding process of a hydrogenation reaction kettle cylinder body which is used for producing various chemical raw materials with a method of continuous hydrogenation. A plate resulted from compounding common carbon steel and stainless steel with the explosive technology is welded and processed into a cylinder shape, thereby overcoming phenomena such as easily-occurring welding cracks, and the like, which are caused by different material properties of the carbon steel and the stainless steel and by the welding among great-thickness carbon steels; and the production cost of the reaction kettle is greatly reduced. The hydrogenation reaction kettle cylinder body produced according to the welding process is widely applied in chemical engineering, pharmaceutical and other industries for producing sorbierite, xylitol, maltose, furfuryl alcohol, and the like.

Description

technical field [0001] The invention relates to a pressure vessel, in particular to a welding technology for a reaction kettle cylinder for producing various chemical raw materials by a continuous hydrogenation method. 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 ...

Claims

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Application Information

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IPC IPC(8): B23K20/08B23K20/24
Inventor 倪加明
Owner 倪加明
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