Ukusebenzisa Isigasemhlabeni Sokunqamula Isigasemhlabeni | Imisiko Yokususa kukaH2S neCO2

Incazelo Yokunqamula

·Inkcazo yeMDEA ebeka umbiko wokukhupha:

Igasi lokulayisha lilahlekelwa ngapha kwehlelo lokuhlambalazekayo futhi lihlangene ngezansi yesilinda sokumelana, lapho sithinta isolution ephansi ye-MDEA eshiywe kulesohlangothini kuqondana nokudla okuphakade. CO₂ ne-H₂S zimelanelwa khona. Isolution engenamandla ihlukunyezwa ngokudala kwe-flash tank ukususa i-hydrocarbons, ikhanyiselwa kulean-rich solution heat exchanger, bese lihlangene ngezansi yesilinda sokubuyisa. Ngaphansi kwegasi likagereka kwi-reboiler, CO₂ ne-H₂S zibuyiselwa. Isolution esiphinde siphinde sabekwe silahlukaniswa, silahlazelwa, futhi silahliselwa kabusha emuva kusilinda sokumelana ukuzulazula. Igasi elihlangothini lesilinda lingathunyelwa amathuba okubuyisa isulfur noma izigaba ze-CO₂ liquefaction.

·Inkcazo yendlela yokususa umlilo we-Molecular Sieve:

Emva kokukhupha ukhaboni, igesi yamandla ingena eToweni A yokumeka, lapho amanzi akhokhelwa ngokukhetha yi molecular sieve bed. Igesi esuswe emuva ekhulula ukugcina kwezimali ≤ -60°C bese isendelwa phansi. Emva kokugcina kwamandla, Towere B ihlanjiswa ngenqubo yokubuyisa: igesi esuswe emuva noma inyuthini iyashiselwa kwiheiti bese isetshenziswa ukucwasa ngokudluliselwa ku-molecular sieve bed. Amakhulu okugcina akhokhelwa kusihlwanjini kanye asungulwe kusihambe. Ngemuva kwalokho, igesi esuswe emuva esibindi setshenziswa ukusabela phambi kwesihlwanjini ku-40°C, ukuqeda ukubuyisana kusimemeza. Izitoweri ezimbili zihlanjiswa ngokuzenzakalelayo ngamatshini aphrogramekile, ngehora yokuqala ye-8–12.

·Umbiko wokwenza okwesibindi + Umbiko wokwenza Okusekelwe ku-Temperature Swing (TSA):

Emva kokususa umlilo ngomkhumbi we-molecular sieve, igesi yamva ikhona kwi-plate-fin heat exchanger ukulahlaza kabusha, okwakhiwa kumcondensela okuncane kwe-C₅+ imitholwane engenahlobo. Kantiya kulahlaziywa ngokugqagqayo ngendlela ye-turbo-expander noma ingcindezi egcinezileyo, kwaye igazi (lenzeke LPG/NGL) isungulwa kwi-low-temperature separator. Imitholwane engenahlobo ephakathi kwigasi ikhona kwi-TSA molecular sieve adsorption tower, apho imitholwane engenahlobo isungulwa ngokukhethileyo. Igasi eliselayo, enenani lezinto ezingenahlobo ≤ 20 mg/Nm³, lithunyelwa kwi-yuniti ye-liquefaction. Emva kokugcwalisa ngokusungulwa, igasi eligcweleyo elilahlaziywa lukhuselelwa ukwenza ukusabela kwakhona. Imitholwane engenahlobo ethathwa iyuqhafuza kwaye ihlanjululwe, kwaye igasi lokujikeleza liyisetyenziso njengegasi lokusiza.