Study On The Corrosion Mechanism Of The Heated Surface In The Tail Of The Waste Heat Power Station Boiler Of The Glass Kiln

Glass kiln waste heat power generation technology at home and abroad have become more mature,it is recycled glass kiln exhaust temperature exhaust heat in the production process,the process of turning it into electricity.Glass kiln waste heat boiler tail-heating surface corrosion affects the normal operation of an important factor.This article on corrosion reasons and related factors,such as temperature,effects of acid concentration on the corrosion process of research,appropriate preservation measures based on the results,the results achieved to prevent the corrosion and safety operation of glass tank furnace waste heat boiler has the certain reference value.First of all,this article on glass furnace smoke,gas composition,flue gas heat up and sorted and analyzed through flue gas heat recovery of energy saving and emission reduction targets.Glass kiln waste heat power generation requirements,determine the appropriate boiler main parameters.By introducing the structure of a typical glass furnace waste heat boiler,discusses the role of its various parts.Second,heat recovery boiler of combined actual working condition and boiler internal inspection points,based on the failure mode of each part,internal test plan,and test the corrosion of tail heating surfaces.Rollup 8 for waste heat boiler internal test results found that the type of boiler failure mechanism for tail-heating pipes for corrosion.Maximum corrosion rate is greater than the 1.17mm/year,pipe in severely corrosive environment,the safe operation of the boiler had a serious adverse impact.Through the analysis of defects and identify the types of corrosion as the low temperature corrosion.Then against low-temperature corrosion mechanism and characteristics of linear polarization,via experimental study on boiler tail-pipe temperature sulfuric acid concentration and effect of low temperature corrosion on boiler tail-heating surface.Test results showed that at low concentration and temperature conditions,ND the corrosion rate of steel corrosion rate far below the 20G,when the concentration of sulfuric acid is greater than 65%,two steel passivation effect,when the temperature is higher,two steel corrosion rate difference now.This shows that:resistance to low temperature corrosion of ND steel is better than 20G.In experiment of based Shang proposed has several corrosion protection of method:using quality oil coke as glass kiln of fuel,can reduced SO3 of content to reduced sulfuric acid of dew point temperature;improve low temperature heated surface of wall surface temperature,not let its fell in extension serious corrosion effect temperature district;using resistance corrosion sex compared good of material,as 09CrCuSb seamless steel tube;due to product gray on boiler biography efficiency of effect larger,so keep boiler tail heated surface of clean degrees can effective reduce low temperature corrosion.Finally,the study guide,Zhangzhou city,glass kiln waste heat boiler tail-heating surface modification.Tail-heating surface of piping materials by 20G replaced by 09CrCuSb steel,suggest that enterprises monitor exhaust gas temperature at the end of,and adjust to increased water temperature through thermal deaerator will eventually exhaust gas temperature is above 170 ?.Run through three years of monitoring,conducted an internal examination and found the tail-heating surface corrosion defects significantly exceeded,explains tail heating surfaces of low temperature corrosion phenomena are subject to effective control,so as to ensure the stable operation of waste heat boiler and glass kilns.