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

1, boiler pub dej los kho tus nqi pH ntawm qhov laj thawj

Niaj hnub no, feem ntau cov boilers hauv Suav teb siv cov dej demineralized lossis sodium ion resin pauv dej mos, rov qab osmosis demineralized dej lossis sodium ion resin pauv dej mos pH tus nqi feem ntau qis thiab acidic, rov qab osmosis demineralized dej pH tus nqi feem ntau yog 5-6, sodium ion resin pauv dej mos pH tus nqi feem ntau yog 5.5-7.5, txhawm rau daws qhov xeb ntawm cov dej acidic rau boilers thiab cov kav dej, Raws li cov kev cai ntawm lub teb chaws tus qauv BG / T1576-2008, tus nqi pH ntawm cov dej boiler kev lag luam yog ntawm 7-9 thiab tus nqi pH ntawm cov dej demineralized yog ntawm 8-9.5, yog li cov dej boiler yuav tsum kho tus nqi pH.

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

Sodium carbonate feem ntau hu ua soda, soda tshauv, soda tshauv, ntxuav alkali, faib ua ntsev, tsis yog alkali, tshuaj mis Na2CO3, nyob rau hauv qhov xwm txheej ib txwm rau hmoov dawb lossis ntsev zoo. Lub hauv paus ntsiab lus ntawm kev ntxiv sodium carbonate rau hauv boiler pub dej kom kho tus nqi pH yog siv sodium carbonate los yaj hauv dej thiab ua alkaline, uas tuaj yeem neutralize carbon dioxide hauv acidic pub dej thiab daws qhov corrosion ntawm acid softened dej lossis ntsev dej ntawm boiler thiab pipeline. Sodium carbonate yog ib qho electrolyte tsis muaj zog, yaj hauv dej los ua ib qho buffer solution ntawm sodium carbonate thiab sodium bicarbonate, muaj ib qho electrolytic balance hauv cov tshuaj, nrog rau kev noj ntawm electrolytic hydroxide, qhov sib npaug yuav txuas ntxiv mus rau sab xis, yog li pH tam sim no nyob rau hauv cov tshuaj tiv thaiv tsis hloov pauv ntau.

Cov txheej txheem hydrolysis sodium carbonate thawj zaug:

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

Cov txheej txheem hydrolysis theem nrab ntawm sodium carbonate:

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

Cov kab zauv hydrolyzed ion thawj zaug ntawm sodium carbonate:

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

Cov kab zauv hydrolyzed ion theem nrab ntawm sodium carbonate:

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

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

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

Cov qauv ionization rau sodium hydroxide: NaOH = Na ++ OH-

Ntxiv sodium hydroxide rau hauv dej ntawm lub boiler tuaj yeem ua kom cov zaj duab xis tiv thaiv ntawm qhov chaw ntawm cov hlau ruaj khov, txhim kho tus nqi pH ntawm cov dej pub boiler thiab cov dej hauv lub cub tawg, yog li daws qhov xeb ntawm cov kua qaub mos lossis cov dej demineralized ntawm lub boiler thiab cov kav dej, thiab tiv thaiv cov khoom siv hlau los ntawm kev xeb.

4. Cov txiaj ntsig thiab qhov tsis zoo ntawm kev siv sodium carbonate lossis sodium hydroxide los kho tus nqi pH rau cov dej pub boiler raug muab piv rau

4.1 Qhov ceev ntawm kev nce pH nrog sodium carbonate thiab sodium hydroxide rau cov dej pub boiler thiab lub sijhawm ntawm kev tswj hwm kev siv cov txiaj ntsig sib txawv

Qhov ceev ntawm kev ntxiv sodium carbonate rau hauv cov dej boiler kom nce pH yog qeeb dua li ntawm sodium hydroxide. Vim tias sodium carbonate tsim cov tshuaj buffer, nws muaj qhov hloov pauv me me thiab ruaj khov thiab yooj yim kho. Txawm li cas los xij, qhov ntau ntawm kev kho pH yog txwv. Thaum kho tib tus nqi pH, qhov ntau ntawm sodium carbonate yuav loj dua li ntawm sodium hydroxide. Cov txiaj ntsig 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 qhov pH ntawm qhov volatility yog loj, sodium hydroxide tom qab ntxiv dej pH yog yooj yim kom nce, kho qhov pH sai dua thiab ncaj qha dua, tab sis kuj yooj yim rau overthrow tsis tuaj yeem muab ntau dhau, piv nrog sodium carbonate ntxiv ntau tsawg dua tuaj yeem ncav cuag pH index xav tau, uas yog hais tias, txawm hais tias sodium hydroxide pH nqi nce, Txawm li cas los xij, qhov ntau ntawm sodium hydroxide ntxiv tsis loj, uas yog, lub peev xwm ntawm dej los neutralize cov kua qaub ntawm hydroxide pawg tsis nce ntau, pH yuav sai sai poob.

4.2 Qhov kev puas tsuaj los ntawm kev ntxiv ntau dhau ntawm sodium carbonate thiab sodium hydroxide kom nce pH rau cov dej pub boiler yog txawv

Ntxiv sodium carbonate ntau dhau rau hauv dej boiler kom kho qhov pH yuav ua rau cov ntsev ntawm cov dej lauj kaub thiab qhov conductivity nce ntxiv; Muaj ntau bicarbonate ions hauv cov dej lauj kaub, thiab bicarbonate ions yooj yim decomposed rau hauv carbon dioxide thaum cua sov. CO2 nkag mus rau hauv lub tshuab hloov cua sov thiab dej condensate nrog lub pa. Sodium carbonate tsis yog tsuas yog tsis tuaj yeem kho qhov pH ntawm cov pa thiab cov dej condensate rov qab, tab sis kuj txo qhov pH ntawm cov pa thiab condensate, corroding lub tshuab hloov cua sov thiab cov kav dej condensate. Yog vim li cas cov hlau ions hauv cov dej condensate rov qab ntau dua li xim daj lossis liab.

Ntxiv sodium hydroxide ntau dhau rau hauv dej kub kom kho qhov pH yuav ua rau cov dej hauv lub lauj kaub alkali ntau dhau, thiab cov dej thiab dej qab zib yuav tshwm sim. Qhov ntau ntawm sodium hydroxide tsis yooj yim rau kev tswj hwm, thiab NaOH dawb ntau dhau yuav ua rau muaj alkalinity loj, thiab alkali embrittlement kuj tseem yuav ua rau cov khoom siv xeb. Tus sau tau pom lub thawv iav fiber reinforced yas debrine puv ntawm cov thaj ntawm tus neeg siv qhov chaw, uas tau corroded thiab perforated vim yog siv sodium hydroxide los tswj qhov pH ntawm debrine. Sodium hydroxide tsis tuaj yeem kho qhov pH ntawm cov pa thiab cov pa condensation rov qab dej, thiab tsis tuaj yeem tswj qhov xeb ntawm cov pa thiab cov pa condensation rov qab dej cov khoom siv thiab cov yeeb nkab network.

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

Sodium carbonate yog qhov tsis hnyav, yog cov khoom siv qib zaub mov, me ntsis kev txhawb nqa, me ntsis xeb, ib txwm tuaj yeem kov los ntawm tes, ntev ntev yuav tsum hnav hnab looj tes.

Sodium hydroxide yog ib yam khoom txaus ntshai, xeb, thiab nws cov kua lossis hmoov av uas txau rau ntawm daim tawv nqaij, tshwj xeeb tshaj yog rau ntawm daim nyias nyias, tuaj yeem ua rau cov qhov txhab mos mos, thiab tuaj yeem nkag mus rau hauv cov nqaij tob. Kev kub hnyiab tawm qhov caws pliav. Kev txau rau hauv lub qhov muag, tsis yog tsuas yog ua rau lub qhov muag puas tsuaj xwb, tab sis kuj ua rau cov nqaij tob ntawm lub qhov muag puas tsuaj. Yog li ntawd, tus neeg teb xov tooj yuav tsum siv tshuaj pleev xim tsis muaj zog thiab tsis muaj dej rau ntawm daim tawv nqaij, thiab yuav tsum hnav khaub ncaws ua haujlwm, lub ntsej muag, tsom iav tiv thaiv, hnab looj tes roj hmab, daim ntaub npog roj hmab, khau roj hmab ntev thiab lwm yam khoom siv tiv thaiv kev ua haujlwm kom ua haujlwm zoo ntawm kev tiv thaiv tus kheej.

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