Semi-circle type low-temperature novel expansion joint

Abstract

The invention discloses a semi-circle type low-temperature novel expansion joint, and belongs to the technical field of flue gas desulfurization. The novel expansion joint comprises a plurality of wave joints which are sequentially connected end to end, wherein each wave joint comprises an arc-shaped wave joint body and first connecting parts which extend towards the horizontal direction of two sides through the wave joint body; and second connecting parts welded with the wave joint bodies and the first connecting parts into a whole are arranged above the head-section wave joint and below thetail-section wave joint. The smooth inner wall of each wave joint body has a good flow guide effect, the interior of the wave joint body is guaranteed to be dry, free of accumulated water and free ofcorrosion, effective telescopic deformation generated by the wave joint body is sufficient to compensate for flue temperature difference and additional stress caused by mechanical vibration under thecondition that the temperature is not high, and the novel expansion joint is suitable for a flue gas desulfurization flue.

Description

technical field [0001] The invention relates to the technical field of flue gas desulfurization, in particular to a semi-arc type low-temperature novel expansion joint. Background technique [0002] At present, power plants generally add low-temperature economizers, and after this equipment, there are multiple metal or non-metallic expansion joints to the flue gas system at the flue outlet of the power plant. Because the flue gas contains a certain amount of water, it condenses into a strong corrosive liquid when it is cold, and part of it is deposited in the lower part, especially at the expansion joint, causing corrosion and leakage. [0003] In the prior art, rubber expansion joints are mostly used in traditional desulfurization expansion joints, and metal expansion joints are used in the dry flue gas side. The design life of rubber expansion joints is generally 4 years. Uneven stress, problems with rubber formulations and vulcanization processes, etc., can easily cause ...

AI Technical Summary

Problems solved by technology

The design life of rubber expansion joints is generally 4 years. Uneven stress, problems with rubber formulations and vulcanization processes, etc., can easily cause the rubber body of rubber expansion joints to bond with the skeleton, cord fabric, etc. Expansion joints mostly use double wave joints. Due to the large bending angle and excessive extension of the outer material, corrosion and perforation are prone to occur.

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