Umthengisi weDiethylhydroxylamine (DEHA) eMzantsi Afrika

Yintoni iDiethylhydroxylamine?

I-Diethylhydroxylamine (DEHA, N,N-diethylhydroxylamine) yikhompawundi ye-nitrogen yendalo esebenza njengesixhobo sokukhupha ioksijini eguquguqukayo kunye ne-arhente yokudlulisa amanzi kwi-boiler nakwinkqubo yomphunga. Ngokungafaniyo ne-inorganic oxygen scavengers (i-sodium sulfite, i-hydrazine), i-DEHA iguquguqukayo - isasazeka phakathi kwamanzi e-boiler kunye nesigaba somphunga, ihamba nomphunga ukuya kwinkqubo ye-condensate apho iqhubeka nokukhupha ioksijini kwaye ibonelela ngokhuseleko lokugqwala kuyo yonke isekethe ye-steam-condensate. Oku kwenza i-DEHA isebenze ngokukodwa kwiinkqubo apho ukungena kweoksijini kwenzeka kuyo yonke i-condensate return, kungekuphela nje kwicandelo le-deaerator-to-boiler.

Indlela Yokuhlutha Ioksijini kunye Nokusebenzisa I-Passivation

I-DEHA inciphisa ioksijini enyibilikisiweyo emanzini okusela ebhoyila ngokusebenzisa i-reaction: 2(C₂H₅)₂NOH + O₂ → 2(C₂H₅)₂NO + H₂O (efakwe i-oxidised kwi-diethylnitroxide). I-reaction yokuhlutha iqhubeka kumaqondo obushushu angaphezu kwama-60°C kwaye isebenza kumanqanaba obushushu obusebenzayo kwiibhoyila eziphantsi ukuya kweziphakathi. Ngaphaya kokususwa kweoksijini, inzuzo eyahlukileyo ye-DEHA kukungashukumi: ikhuthaza ukwenziwa kwefilimu yokungashukumi yemagnetite (Fe₃O₄) kwiindawo zentsimbi kwibhoyila nakwinkqubo yokuxinana, endaweni ye-iron oxide enemingxuma, engakhuseli kakhulu (hematite, Fe₂O₃) eyenziwa phantsi kweemeko ezinganciphisi kangako. Le filimu yemagnetite exineneyo inika ukhuseleko oluphezulu lokugqwala ixesha elide kwaye inciphisa ukuthuthwa kwesinyithi kwibhoyila.

Iingenelo ngaphezu kweSodium Sulfite

I-Sodium sulfite, isixhobo esiqhelekileyo sokususa ioksijini engadalwanga, singenisa i-sulfate emanzini ebhoyila (Na₂SO₃ + ½O₂ → Na₂SO₄) kwaye asiguquguqukiyo — asiyikhuseli inkqubo ye-condensate. Xa uxinzelelo lwebhoyila lungaphezulu kwe-~40 bar, i-sodium sulfite ikwabola ngobushushu ibe yi-SO₂ kunye neegesi ze-H₂S, ezibangela ukubola kwe-condensate. I-DEHA iyayiphepha le ngxaki — ayivelisi sulfate okanye iimveliso zokubola kwe-corrosive kwaye ihamba nomphunga ukukhusela ukubuya kwe-condensate. I-Terracore Chemicals inikezela nge-DEHA (95% grade) kwiidrama ezingama-25 kg kunye nama-200 kg kwiinkqubo zonyango lwamanzi ebhoyila kuMzantsi Afrika.