Expansion node

Abstract

The invention discloses an expansion joint which comprises a frame. The upper part of the frame is provided with a top expansion area, while the lower part thereof is provided with a bottom expansion area opened with a diversion trench, and a honeycomb duct is positioned in the diversion trench. The frame adopts carbon steel materials, the top expansion area adopts nonmetal fabric materials, and the bottom expansion area and the honeycomb duct adopt alloy materials. Different materials are adopted at different areas of the expansion joint and the angle and size of each part are adjusted reasonably, thus being capable of avoiding water accumulation at the bottom of the expansion joint, the corrosion and perforation of expansion material at the bottom as well as the deposition of solid matters in condensate; having the function of corrosion resistance and leakage resistance; prolonging the service life of the expansion joint and improving the reliability of the device.

Description

【Technical field】 [0001] The invention relates to a system for removing sulfur dioxide in flue gas at the tail of a coal-fired power plant boiler, that is, a limestone / gypsum wet flue gas desulfurization system, in particular to an improvement on an 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 accounts for more than 70% of the primary energy production and consumption in my country. 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 mature process in the world today, and it is also the leading process for desulfurization of domestic thermal power plants. The main process of this process is that the flue gas of the boiler enters the f...

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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