Chii chinonzi boiler low temperature corrosion?
Sulfuric acid corrosion inoitika kuseri kwekudziya kwepamusoro pebhailer (economizer, air preheater) inonzi yakaderera-tembiricha corrosion nekuti iyo flue gasi uye chubhu madziro tembiricha muchikamu chekumashure chekudziya kwakadzikira. Mushure mekudzika-kupisa kwekupisa kunoitika mueconomizer chubhu, kuvuza kunogona kuitika mukati menguva pfupi, zvichiunza njodzi yekuchengetedza. Kudzima choto kuti chigadziriswe kuchakonzerawo kurasikirwa kukuru kwehupfumi.
Chikonzero chikuru chekudzika-kupisa kwekushisa kwema boilers
Sarufa iri muhuturu inopiswa kuita sarufa dhiokisi (S+02=SO2). Iyo sulfur dioxide inowedzerwa oxidized pasi pechiito checatalyst kuita sulfur trioxide (2SO2+02=2S03). SO3 uye mhute yemvura mugasi reflue inogadzira sulfuric acid mhute (SO3+H2O =H2SO4). Kuvapo kwe sulfuric acid vapor kunowedzera zvakanyanya dova re flue gasi. Sezvo tembiricha yemhepo mumhepo preheater yakadzikira, tembiricha yegesi gasi muchikamu chepreheater haina kukwirira, uye tembiricha yemadziro kazhinji yakaderera pane flue gasi dova point. Neiyi nzira, sulfuric acid mhute inonamira pamusoro pekudziya pamusoro pemhepo preheater, zvichikonzera sulfuric acid corrosion. Kudzikira-kupisa kwekupisa kunowanzoitika mumhepo preheaters, asi kana sarufa iri mumafuta yakakwira, iyo yakawandisa mhepo coefficient yakakura, iyo SO3 yemukati mugesi reflue yakakwira, iyo acid dova inokwira, uye tembiricha yemvura yekudyisa inokwira. yakaderera (iyo turbine yakavharwa pakupisa kwepamusoro), iyo economizer chubhu inogonawo kutambura nekudzika-kupisa ngura.
Boiler yakaderera tembiricha corrosion kesi
Boiler yekambani inotenderedza mubhedha wakaiswa mukushanda nguva nenguva kwerisingasviki gore, uye mapaipi akawanda mupombi yepasi economizer akatambura nekubuda uye kubuda. Iyo boiler mafuta musanganiswa webituminous marasha uye sludge, iyo economizer chubhu zvinhu isimbi makumi maviri (GB/T 3087-2008), uye economizer inlet tembiricha inowanzodzika kupfuura 100 ° C.
Zvikonzero zvekuboora uye kudonha kwechubhu yeeconomizer zvakaongororwa kuburikidza nekuongorora kuumbwa kwezvinhu, bvunzo yemidziyo yemuchina, ongororo yemetallographic, kuongorora maelectronic microscope morphology uye simba rekuongorora simba, X-ray diffraction phase analysis, etc. Ongororo yakawana kuti economizer chubhu. inoshanda pane yakaderera tembiricha, uye corrosion zvigadzirwa zvine huwandu hukuru hweS uye Cl zvinhu. Rusvingo rwekunze rweeconomizer chubhu inotambura nekudzikira-kupisa pasi pekushanda kwakadzika-tembiricha uye acid corrosion panguva yekudzima, izvo zvinozopedzisira zvaita kuti marasha apone. Iyo pombi ine corrod, perforated uye kubuda.
Kudzika kwekushisa kwekushisa kwekudzivirira matanho
1. Wedzera tembiricha yemudhuri yemhepo preheater chubhu kuitira kuti tembiricha yemadziro ikwire pane flue gasi dova point.
2. Zvinowedzera kune flue gasi kuti neutralize SO3 uye kudzivirira chizvarwa che sulfuric acid mhute. 3. Shandisa yakaderera-kupisa-inodzivirira corrosion zvinhu kugadzira mhepo preheater uye economizers.
4. Shandisa pasi-oxygen combustion kuti uderedze okisijeni yakawandisa mumhepo yeflue uye kudzivirira uye kuderedza kutendeuka kweSO2 muSO3.
5. Nekuona iyo acid dew point tembiricha, iyo acid dova inonongedza pasi pemamwe mamiriro ekushanda anogona kunyatsozivikanwa, nekudaro kugadzirisa tembiricha yekuburitsa gasi kuti iwane yakanakisa mamiriro ekuchengetedza simba uye kuwedzera hupenyu hwebhailer.
Nguva yekutumira: Nov-30-2023
