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Tube bundle of heat exchanger of slurry oil vapor generator and production method of tube bundle
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A technology of a steam generator and a production method, which is applied in the directions of heat exchanger shells, tubular elements, heat exchange equipment, etc., can solve the problems of economic losses of enterprises, affecting the normal operation of enterprises, production stagnation, etc., to improve production efficiency and simple structure. , the effect of reducing the number of maintenance
Active Publication Date: 2013-12-18
WUXI DINGBANG HEAT EXCHANGE EQUIP
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Problems solved by technology
The tube bundle can only be scrapped after several times of repair welding, resulting in production stagnation, affecting the normal operation of the enterprise, and causing large economic losses to the enterprise
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Embodiment 1
[0021] Embodiment 1: The diameter of the welded tube sheet is 1600 mm; the diameter of the welded heat exchange tube is 32 mm, and the wall thickness of the heat exchange tube is 3 mm; the diameter of the circle where the arc surface of the spherical cutout is located is 2.5 mm.
[0022] a. Preheating: Preheat the tube sheet and heat exchange tubes before welding, so that the temperature of the tube sheet and heat exchange tubes reaches 180 °C.
[0023] b. Automatic welding: After preheating, the tube sheet and heat exchange tubes are automatically welded. Low-speed multi-pass continuous welding is used for welding, and the welding temperature is 180°C. The electrodes used are conventional electrodes.
[0024] c. The first heat preservation: After the welding is completed, heat the tube bundle to 650°C, and then hold it for 3 hours, with a heating rate of 40°C / h.
[0025] d. The first cooling: After the heat preservation of the tube bundle is completed, the temperature is...
Embodiment 2
[0029] Embodiment 2: The diameter of the welded tube sheet is 1500 mm; the diameter of the welded heat exchange tube is 32 mm, and the wall thickness of the heat exchange tube is 3 mm; the diameter of the circle where the arc surface of the spherical cutout is located is 2.8 mm.
[0030] a. Preheating: Preheat the tube sheet and heat exchange tubes before welding, so that the temperature of the tube sheet and heat exchange tubes reaches 160 °C.
[0031] b. Automatic welding: after the preheating is completed, the tube sheet and heat exchange tubes are automatically welded. Low-speed multi-pass continuous welding is used for welding, and the welding temperature is 160°C.
[0032] c. The first heat preservation: After the welding is completed, heat the tube bundle to 660°C, and then hold it for 2 hours, with a heating rate of 30°C / h.
[0033] d. The first cooling: After the heat preservation of the tube bundle is completed, the temperature is lowered to 420°C, and the coolin...
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Abstract
The invention relates to a tube bundle of a heat exchanger of a slurry oil vapor generator and a production method of the tube bundle, belonging to the technical field of chemical equipment. The tube bundle of the heat exchanger of the slurry oil vapor generator comprises a tube board and a heat exchange tube, wherein a through tube hole is formed inside the tube board; and a spherical groove is arranged at the end part of the tube board; the heat exchange tube is mounted in the tube hole; and the heat exchange tube and the tube board are welded together at the spherical groove. The production method of the tube bundle of the heat exchanger of the slurry oil vapor generator comprises the following steps of pre-heating, automatic welding, primary thermal insulation, secondary thermal insulation, secondary cooling and natural cooling. The tube bundle of the heat exchanger of the slurry oil vapor generator provided by the invention is simple, compact and reasonable in structure; a welding strain of a welding part can be effectively reduced; anti-fatigue strength and anti-heat strain capability of the welding part can be greatly improved; the service life of the tube bundle is prolonged, so that the heat exchanger of the slurry oil vapor generator is safe and continuous to operate; and the maintenance frequency is reduced, and the productivity effect is finally improved.
Description
technical field [0001] The invention relates to a heat exchanger tube bundle of an oil slurry steam generator and a production method thereof, belonging to the technical field of chemical equipment. Background technique [0002] Slurry steam generator heat exchanger is one of the key equipment in the catalytic cracking unit of petroleum refining and chemical enterprises. The traditional oil slurry steam generator heat exchanger is designed and manufactured according to the GB151 standard. Since the GB151 standard has relatively general regulations on the section of the tube sheet and the connection form with the heat exchange tube, it has a wide range of applications. For medium pressure, high temperature and shell and tube There are no special requirements for the tube bundle of the slurry steam generator with a large process temperature difference. After this type of equipment is put into use, within one year, some only three months or so, the tube sheet cracks, and the c...
Claims
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Application Information
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