New-type hinge expansion joint for high-temperature flue of flue gas turbine

Abstract

The invention discloses a new-type hinge expansion joint for a high-temperature flue of a flue gas turbine. The new-type hinge expansion joint comprises a pipe nipple I, a pipe nipple II, a corrugatedpipe, a load-bearing frame I, a load-bearing frame II, two sets of hinge mechanisms and eight sets of support assemblies, wherein the pipe nipple I, the corrugated pipe and the pipe nipple II are connected in sequence; the load-bearing frame I is located on the side where the pipe nipple I is located and supports the pipe nipple I through four of the sets of support assemblies; the load-bearing frame II is located on the side where the pipe nipple II is located and supports the pipe nipple II through the other four sets of support assemblies; and the two sets of hinge mechanisms are mounted between the load-bearing frame I and the load-bearing frame II. The invention ensures the persistent working of the expansion joint under high temperature, thereby prolonging the service life of the product.

Description

Technical field [0001] The invention belongs to the technical field of expansion joints, and in particular relates to a hinge expansion joint for a novel flue gas turbine high-temperature flue. Background technique [0002] The energy recovery system of the catalytic cracking unit is the key device of the oil refining system. The energy recovery system uses the flue gas of the catalytic cracking unit to drive the flue gas temperature and pressure energy, and use the flue gas pressure and temperature energy to generate power to drive the main fan to do work. Or drive the generator to generate electricity in order to fully recover the energy of the regenerated flue gas. The inlet pipeline of the hood is a hot wall structure, and there is no heat insulation material inside. Its working pressure is relatively high, generally 0.2~0.38MPa. In recent years, in order to improve the energy efficiency of the hood, each catalytic cracking unit has generally increased the temperature of the...

AI Technical Summary

Problems solved by technology

However, as mentioned above, the working temperature at the inlet of the smoke machine reaches 700-750°C, which causes the stressed structural parts to be in the creep temperature range. During the operation, the weld bead of the stressed structural parts often cracks, seriously affecting the normal operation of the equipment

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