Elastic sealing sleeve device for floating tube sealing of air pre-heater

Abstract

According to the requirement for operation of an air pre-heater, a heat exchange tube stretches in a tube hole of an upper tube board, and air is not leaked. At present, the well known sealing structure is of a floating tube sealing structure which cannot easily ensure that the tube hole is sealed under the high temperature working state mainly because that the rigidity of a sealing sleeve is too large and the sealing sleeve cannot be sealed with a heat exchange tube with poor installation coaxiality. An elastic sealing sleeve device for floating tube sealing of the air pre-heater is composed of a packing gland, sealing packing, an elastic sealing sleeve, an upper tube board, a heat exchange tube and the like, and is characterized in that the elastic sealing sleeve is composed of an upper part, a middle part and a lower part, the upper part is a packing box, the lower part is a sealing ring, and the middle connection part is an elastic cylinder. As the elastic cylinder is arranged in the middle, the rigidity, in various directions, of the sealing ring is largely lowered, the sealing problems such as the poor installation coaxiality of the heat exchange tube can be solved under the high temperature working state, and therefore the hidden danger of occurrence of large-area fire of the upper tube board is eliminated, and the safety performance of the elastic sealing sleeve device is improved.

Description

technical field [0001] The present invention relates to a kind of carbon black production equipment, especially air preheater Background technique [0002] The operation of the air preheater requires the heat exchange tube to expand and contract in the tube hole of the upper tube sheet without air leakage; because once the air leaks, the high temperature carbon black flue gas mixed with the air can cause a fire when the concentration reaches a certain concentration; the leakage of a single tube hole can cause a single A local fire in the hole and the simultaneous air leakage of multiple pipe holes can cause a large-scale fire on the upper tube sheet, which is a major safety accident. At present, the known air preheater heat exchange tube telescopic sealing device on the tube hole of the upper tube sheet is "a kind of air preheater floating tube sealing structure" (patent number: 200820176623.4); figure 2 It is a schematic diagram of its structure, consisting of a sealing sl...

AI Technical Summary

Problems solved by technology

[0005] The beneficial effects of the invention are: the new sealing sleeve improves the elasticity, solves the problem that the high rigidity is not conducive to the high-temperature sealing of the tube hole in the past, eliminates the hidden danger of a large-area fire on the upper tube plate, and greatly improves the safety performance of the equipment

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