Catalytic cracking regeneration flue gas water-sealed tank and method for preventing inner barrel from deformation

Abstract

The invention belongs to the technical field of petroleum processing, and discloses a catalytic cracking regeneration flue gas water-sealed tank and a method for preventing an inner barrel from deformation. The method is characterized in that an axial thermal expansion device is arranged on an overflow port tube of the inner barrel of the water-sealed tank and is composed of a cylindrical inner sleeve, an annular plate plug and a metal bellows, one end of the cylindrical inner sleeve is connected with the inner barrel of the water-sealed tank, the other end of the cylindrical inner sleeve is connected with the annular plate plug with an inner hole, and the inner hole of the annular plate plug is fixedly connected with the outer wall of the metal bellows communicated with the overflow port tube; a circumferential thermal expansion device which deforms under stress to absorb heating circumferential expansion of the inner barrel is arranged on the circumference of a wallboard of the inner barrel of the water-sealed tank. By the adoption of the catalytic cracking regeneration flue gas water-sealed tank and the method for preventing the inner barrel from deformation, axial expansion caused by heating of the inner barrel can be effectively absorbed, circumferential expansion caused by heating of the inner barrel can also be effectively absorbed, the problems that an inner barrel of an existing water-sealed tank expands and deforms under heat and can only be forced to protrude inwards, and then permanent deformation is generated are solved, the inner barrel is prevented from damage, and the service life of the inner barrel is prolonged.

Description

[0001] technical field [0002] The invention belongs to the technical field of petroleum processing, and in particular relates to a water-sealed tank for catalytic cracking regeneration flue gas and a method for preventing deformation of an inner cylinder involved in a comprehensive utilization system for regeneration flue gas of a catalytic cracking device. Background technique [0003] The solid powder catalyst used in the petroleum processing catalytic cracking unit, after completing a reaction process, the surface of the solid powder catalyst will produce carbon deposits, and the surface carbon will reduce the activity of the solid powder catalyst. In order to restore the activity of the solid powder catalyst, it is necessary to 0.2MPa compressed air is introduced into the regenerator of the catalytic cracking unit to burn off the carbon on the surface of the solid powder catalyst. The charring process of the solid powder catalyst in the regenerator will on the one ...

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Problems solved by technology

[0012] Through calculation, it is found that the thermal expansion and deformation of the inner cylinder 2 is very large. The current structural design of the water-sealed tank has not considered the problem of expansion and absorption, so that the deformation of the inner cylinder is caused.

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