Fluoroplastic-steel air preheater with anti-corrosive and anti-blockage functions

Abstract

The invention discloses a fluoroplastic-steel air preheater with anti-corrosive and anti-blockage functions. The fluoroplastic-steel air preheater comprises a plurality of fluoroplastic-steel tubes which are arranged at intervals in parallel and tube plates arranged at the two ends of each fluoroplastic-steel tube respectively, wherein each fluoroplastic-steel tube is produced by coating a fluoroplastic tube with a stainless steel tube; the two ends of each fluoroplastic-steel tube are fixedly connected to the corresponding tube plates through a tube expansion process respectively; and the sidewall of each fluoroplastic-steel tube faces a preheater smoke inlet. The fluoroplastic-steel air preheater disclosed by the invention can solve the easily-caused problems of low-temperature corrosion, ash attachment and slag formation, and the like of the traditional steel air preheaters, and overcomes the defect that fluoroplastic tubes are liable to generate jiggle deformation to influence working life and heat exchange performance under a smoke scouring action due to too thin tube walls in common plastic heat exchangers; and low-temperature corrosion of the air preheater can be prevented, and the fluoroplastic tube bundles can keep the original design shape and are not liable to generate jiggle deformation under the smoke scouring.

Description

technical field [0001] The invention relates to a fluorine-plastic steel air preheater with anti-corrosion and anti-blocking functions, which is used for the replacement and replacement of the last-stage air preheaters at the tails of power plant boilers and various industrial boilers. Background technique [0002] Statistics show that by the end of 2013, my country's annual coal consumption reached 2.475 billion tons of standard coal, oil consumption reached 690 million tons of standard coal, and natural gas consumption reached 217.5 million tons of standard coal. The huge energy consumption puts the entire society and the natural environment under enormous pressure. At the same time, the issue of global climate change has also been put on the political agenda of various countries. In recent years, the issue of carbon emissions in major countries in the world has been Become the main focus of public opinion, the essence of carbon emissions is the issue of energy consumption. ...

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Problems solved by technology

[0008] The purpose of the present invention is to provide a fluorine-plastic steel air preheater with anti-corrosion and anti-blocking functions, which can improve the problems existing in the prior art, and can solve the problems of low-temperature corrosion, ash staining and slagging that are prone to occur in traditional steel air preheaters At the same time, it overcomes the disadvantages of fluoroplastic tubes in general plastic heat exchangers, which are prone to vibration and deformation under the action of flue gas erosion due to the thin wall of the tube, which affects the working life and heat transfer performance. It can prevent air preheating Low-temperature corrosion of the device, and the fluoroplastic tube bundle can maintain the original design shape under the scouring of the flue gas, and it is not easy to shake and deform

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