an expansion joint

Abstract

The invention discloses an expansion joint, which comprises a frame and a side telescopic area. The upper part of the frame is provided with a top telescopic area, and the lower part is provided with a bottom telescopic area. The flow tube, the frame is made of carbon steel, the top expansion zone is made of non-metallic fabric material, the bottom expansion zone is made of alloy material, the guide tube is made of alloy material, and the side expansion zone is composed of alloy and non-metallic fabric. The invention adopts different materials in different areas of the expansion joint, and reasonably adjusts the angle and size of each component, so as to prevent the occurrence of liquid accumulation at the bottom of the expansion joint, prevent the expansion material at the bottom from being corroded and worn out, and prevent solid matter in the condensate Deposition, has the function of anti-corrosion and anti-leakage, which prolongs the service life of the expansion joint and improves the reliability of the equipment.

Description

【Technical Field】 [0001] The invention relates to a system for removing sulfur dioxide in the tail flue gas of a coal-fired power station boiler, that is, a limestone / gypsum wet flue gas desulfurization system, in particular to an improvement of the expansion joint in the system. 【technical background】 [0002] my country is one of the few countries in the world where coal is the main energy source. Coal has always accounted for more than 70% of my country’s primary energy production and consumption. The sulfur dioxide emissions produced by coal combustion have caused huge environmental pollution. It is imperative to control the environmental pollution caused by sulfur dioxide emissions. [0003] The limestone / gypsum wet flue gas desulfurization process is the most widely used and most mature process in all countries in the world today, and it is also the leading process for domestic thermal power plant desulfurization. The main flow of the process is that the flue gas of the boile...

AI Technical Summary

Problems solved by technology

[0006] The current expansion joints are all made of non-metallic materials, and their structure and design basically follow the old-fashioned design ideas, without considering the humid environment where the inner wall will condense. From the actual use situation, there are the following problems: 1) Traditional non-metallic The service life of the expansion joint is short; 2) Traditional non-metallic expansion joints have the phenomenon of running, emitting, dripping, and leaking, and running, emitting smoke, dripping, and leaking condensate have a serious impact on peripheral equipment, the surrounding environment, and inspection personnel; 3 ) reduces the reliability of the system equipment

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