Kev sib piv ntawm qhov zoo thiab qhov tsis zoo ntawm kev siv sodium carbonate lossis sodium hydroxide los kho pH tus nqi rau boiler pub dej

1, boiler pub dej los kho tus nqi pH ntawm yog vim li cas

Niaj hnub no, feem ntau ntawm cov boilers nyob rau hauv Tuam Tshoj siv rov qab osmosis demineralized dej los yog sodium ion resin pauv softened dej, rov qab osmosis demineralized dej los yog sodium ion resin pauv softened dej pH nqi feem ntau yog tsawg thiab acidic, rov qab osmosis demineralized dej pH nqi feem ntau yog 5-6, sodium ion resin pauv softened dej pH nqi feem ntau yog 5.5-7.5, thiaj li yuav daws tau cov corrosion ntawm acidic dej mov rau boilers thiab kav, Raws li cov kev cai ntawm lub teb chaws tus qauv BG / T1576-2008, pH tus nqi ntawm cov boiler muaj dej yog nyob nruab nrab ntawm 7-9 thiab pH tus nqi ntawm cov dej demineralized nyob nruab nrab ntawm 8-9.5, yog li cov dej boiler yuav tsum tau kho tus nqi pH.

2, lub hauv paus ntsiab lus ntawm kev ntxiv sodium carbonate rau boiler pub dej los kho tus nqi pH

Sodium carbonate feem ntau hu ua dej qab zib, dej qab zib tshauv, soda tshauv, ntxuav alkali, cais raws li ntsev, tsis alkali, tshuaj formula Na2CO3, nyob rau hauv ib txwm muaj rau cov hmoov dawb los yog nplua ntsev.Lub hauv paus ntsiab lus tseem ceeb ntawm kev ntxiv sodium carbonate rau hauv boiler pub dej los kho tus nqi pH yog siv sodium carbonate kom yaj hauv dej thiab ua alkaline, uas tuaj yeem cuam tshuam cov pa roj carbon dioxide hauv cov kua qaub pub dej thiab daws qhov corrosion ntawm acid softened dej los yog ntsev. dej ntawm lub boiler thiab pipeline.Sodium carbonate yog ib qho tsis muaj zog electrolyte, yaj nyob rau hauv dej los tsim ib qho kev daws teeb meem ntawm sodium carbonate thiab sodium bicarbonate, muaj qhov sib npaug electrolytic hauv cov tshuaj, nrog rau kev noj cov electrolytic hydroxide, qhov nyiaj tshuav yuav txuas ntxiv mus rau sab xis, yog li ntawd. pH tam sim no nyob rau hauv cov tshuaj tiv thaiv tsis hloov ntau.

Sodium carbonate thawj txheej txheem hydrolysis:

Na2CO3 Sodium carbonate + H2O dej = NaHCO3 sodium bicarbonate + NaOH sodium hydroxide

Sodium carbonate theem nrab hydrolysis txheej txheem:

NaHCO3 sodium bicarbonate + H2O dej = H2CO3 carbonic acid + NaOH sodium hydroxide

Sodium carbonate thawj hydrolyzed ion equation:

(CO3) 2-carbonic acid + H2O dej = HCO3- bicarbonate + OH- hydroxide

Sodium carbonate theem nrab hydrolyzed ion equation:

HCO3- bicarbonate + H2O dej = H2CO3 carbonic acid + OH- hydroxide

3, lub hauv paus ntsiab lus ntawm kev ntxiv sodium hydroxide rau boiler dej los kho tus nqi pH

Sodium hydroxide tseem hu ua caustic soda, caustic soda, caustic soda, caustic soda, feem ntau yog dawb flake, tshuaj formula NaOH, sodium hydroxide muaj zog alkaline, tsis tshua muaj corrosive.

Kev sib npaug ionization rau sodium hydroxide: NaOH = Na + OH-

Ntxiv sodium hydroxide rau cov dej ntawm lub boiler tuaj yeem txhim kho cov yeeb yaj kiab tiv thaiv ntawm qhov chaw ntawm cov hlau, txhim kho pH tus nqi ntawm boiler pub dej thiab cov dej hauv qhov cub, kom daws tau qhov corrosion ntawm cov kua qaub softened dej los yog dej demineralized. lub boiler thiab cov kav dej, thiab tiv thaiv cov khoom siv hlau los ntawm corrosion.

4. Qhov zoo thiab qhov tsis zoo ntawm kev siv sodium carbonate lossis sodium hydroxide los kho pH tus nqi rau boiler pub dej yog muab piv

4.1 Qhov ceev ntawm nce pH tus nqi nrog sodium carbonate thiab sodium hydroxide rau boiler pub dej thiab lub sij hawm tswj kev siv cov nyhuv txawv.

Qhov ceev ntawm kev ntxiv sodium carbonate rau cov dej boiler kom nce pH nqi yog qeeb dua li ntawm sodium hydroxide.Vim tias sodium carbonate tsim cov tshuaj tsis haum, nws muaj qhov hloov pauv me me thiab ruaj khov thiab yooj yim kho.Txawm li cas los xij, qhov ntau ntawm kev hloov pH yog txwv.Thaum kho tib tus nqi pH, tus nqi ntawm sodium carbonate yuav loj dua li ntawm sodium hydroxide.Cov nyhuv siv tau khaws cia ntev, thiab pH ntawm cov dej tsis yooj yim poob.

Sodium hydroxide yog lub hauv paus muaj zog thiab muaj zog electrolyte, sodium hydroxide los kho cov pH tus nqi ntawm cov volatility yog loj, sodium hydroxide tom qab ntxiv cov dej pH yog ib qho yooj yim kom nce, kho tus nqi pH sai dua thiab ncaj qha, tab sis kuj yooj yim rau nruab. overthrow tsis tuaj yeem tso ntau dhau, piv nrog sodium carbonate ntxiv kom tsawg dua tuaj yeem ncav cuag pH qhov ntsuas qhov xav tau, uas yog hais, txawm hais tias sodium hydroxide pH tus nqi nce ntxiv, Txawm li cas los xij, tus nqi ntawm sodium hydroxide ntxiv tsis loj, uas yog, muaj peev xwm ntawm cov dej kom tsis txhob muaj cov kua qaub ntawm pawg hydroxide tsis nce ntau, pH yuav sai sai.

4.2 Cov teeb meem tshwm sim los ntawm kev sib ntxiv ntawm sodium carbonate thiab sodium hydroxide ntau ntxiv kom nce pH nqi rau boiler pub dej sib txawv

Ntxiv cov sodium carbonate ntau dhau rau hauv boiler dej los kho tus nqi pH yuav ua rau cov ntsev cov ntsiab lus ntawm lub lauj kaub dej thiab cov conductivity;Muaj ntau bicarbonate ions nyob rau hauv lub lauj kaub dej, thiab bicarbonate ions tau yooj yim decomposed rau hauv carbon dioxide thaum rhuab.CO2 nkag mus rau hauv lub tshav kub exchanger thiab condensate dej nrog lub chav.Sodium carbonate tsis tsuas yog kho tsis tau pH tus nqi ntawm chav thiab chav condensate rov qab dej, tab sis kuj txo cov pH nqi ntawm chav thiab condensate, corroding lub tshav kub exchanger thiab condensate pipeline.Yog vim li cas vim li cas hlau ions nyob rau hauv chav condensate rov qab dej tshaj cov qauv xim daj lossis xim liab.

Ntxiv sodium hydroxide ntau dhau rau hauv lub qhov cub dej los kho tus nqi pH yuav ua rau lub lauj kaub dej alkali siab dhau, thiab dej thiab dej qab zib yuav tshwm sim.Tus nqi ntawm sodium hydroxide tsis yooj yim los tswj, thiab ntau NaOH dawb yuav ua rau cov txheeb ze alkalinity loj, thiab alkali embrittlement kuj yuav ua rau corrosion rau cov khoom siv.Tus sau tau pom ib lub iav fiber reinforced yas debrine tank tag nrho ntawm thaj ua rau thaj ntawm tus neeg siv qhov chaw, uas tau corroded thiab perforated vim yog siv sodium hydroxide los tswj pH tus nqi ntawm debrine.Sodium hydroxide tsis tuaj yeem kho tus nqi pH ntawm chav thiab chav ua kom rov qab dej, thiab tsis tuaj yeem tswj qhov corrosion ntawm chav thiab chav condensation rov qab cov khoom siv dej thiab cov yeeb nkab network.

4.3 Kev nyab xeeb ntawm sodium carbonate thiab sodium hydroxide siv hauv boiler pub dej kom nce pH tus nqi sib txawv

Sodium carbonate kuj yog me me, belongs rau cov khoom noj khoom haus qib, stimulation me me, me ntsis corrosion, ib txwm muaj peev xwm kov tau ntawm tes, mus sij hawm ntev yuav tsum hnav hnab looj tes.

Sodium hydroxide yog cov khoom txaus ntshai, corrosive, thiab nws cov tshuaj los yog plua plav tawm ntawm daim tawv nqaij, tshwj xeeb tshaj yog nyob rau hauv daim tawv nqaij, tuaj yeem tsim cov pob txha mos, thiab tuaj yeem nkag mus rau hauv cov ntaub so ntswg sib sib zog nqus.Ib qho hlawv tawm ib qho caws pliav.Splashing rau hauv lub qhov muag, tsis tsuas yog ua rau lub cornea, tab sis kuj ua rau cov ntaub so ntswg sib sib zog nqus ntawm lub qhov muag.Yog li ntawd, tus neeg teb xov tooj yuav tsum siv cov tshuaj tsw qab thiab hydrophobic rau ntawm daim tawv nqaij, thiab yuav tsum hnav khaub ncaws ua haujlwm, qhov ncauj qhov ntswg, tsom iav tiv thaiv, hnab looj tes roj hmab, roj hmab aprons, khau looj plab hlaub ntev thiab lwm yam khoom siv tiv thaiv kev ua haujlwm kom ua haujlwm zoo ntawm kev tiv thaiv tus kheej.

Muaj kev siv thiab kuaj cov ntaub ntawv uas qhia tau hais tias: Sodium hydroxide thiab sodium carbonate yog siv hloov pauv, lossis sib xyaw, nws kev lag luam thiab cov txiaj ntsig zoo dua li siv qee qhov pH regulator ib leeg.Thaum tus nqi pH ntawm boiler pub dej pom tias qis dhau lawm, qee qhov sodium hydroxide tuaj yeem raug ntxiv kom tsim nyog kom nce pH tus nqi sai.Tom qab sodium hydroxide tau yaj tag, qee qhov sodium carbonate tuaj yeem muab ntxiv los txhawb cov carbonate hauv dej.Qhov no tuaj yeem yooj yim poob ntawm tus nqi pH ntawm cov dej pub;Vim tias cov sodium carbonate tuaj yeem muab tso rau hauv ntau dua, lub peev xwm los tswj cov carbonates hauv dej yog ntau dua, yog li feem ntau sodium carbonate tuaj yeem siv los tswj pH tus nqi ntawm cov dej thiab lub lauj kaub dej, tsuas yog thaum pH tus nqi ntawm cov dej tsawg dhau lawm, tus sau tau pom zoo kom siv sodium hydroxide kom ceev pH tus nqi, kom ob qho tib si hloov pauv, kev lag luam thiab cov txiaj ntsig zoo.