Tswj Flue Gas Acid Dew Point los tiv thaiv qis-kub Acid Corrosion Ntawm Boilers

Coal, roj thiab lwm yam roj muaj ib tug npaum li cas ntawm leej faj. Thaum lub sij hawm combustion txheej txheem, sulfur ua ke nrog oxygen los tsim sulfur dioxide thiab taug qab sulfur trioxide. Cov kab ntawm cov sulfur trioxide zoo heev ua rau cov kua dej ntws tawm. Thaum qhov kub ntawm qhov cua sov ntawm qhov chaw tom qab ntawm lub boiler qis dua qhov flue roj dew taw tes, cov tshuaj sulfuric acid uas muaj concentrated heev yuav condense rau ntawm phab ntsa, ua rau corrosion loj heev. Yog li ntawd, qhov dew point yog hu ua acid dew point. Yog ntsuas qhovflue gas acid dew pointtuaj yeem tswj cov cua kub kom tsim nyog, tiv thaiv kom tsis txhob muaj kev sib tsoo, thiab rov qab tau ntau npaum li qhov ua tau kom muaj kev nyab xeeb thiab kev lag luam ntawm boiler.

Covflue gas acid dew pointyog qhov kub ntawm cov kua mus txog ob theem sib npaug nrog cov chav npog nws qhov chaw. Lub boiler flue gas muaj txog 10% H2O chav thiab ib qho nyiaj ntawm SO3. Thaum qhov kub qis dua 200 degree, SO3 thiab H2O tsim H2SO4 chav. Yog li ntawd, lubflue gas acid dew pointyog qhov ntsuas kub uas H2O-H2SO4 sib xyaw ua ke thiab H2O-H2SO4 tov yog nyob rau hauv ob-theem equilibrium.

Tom qab siv lub flue gas acid dew point analyzer, koj tuaj yeem paub tseeb tias cov kua qaub dew point tus nqi hauv cov roj flue ntawm lub boiler thiab cua sov rauv, nrog rau cov ntsiab lus oxygen, dej vapor (% dej vapor tus nqi) lossis dew point tus nqi ( -50 degree -100 degree ) thiab dej cov ntsiab lus (G grams/KG ib kilogram) thiab av noo tus nqi RH. Cov neeg siv tuaj yeem tswj cov pa cua kub hauv qhov ntau me ntsis siab dua qhovflue gas acid dew pointraws li lub ntsuas ntsuas los yog 2- txoj kev 4-20mA tso zis teeb liab kom tsis txhob kub-kub acid corrosion thiab nce boiler kev nyab xeeb.