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Liquefaction khase ea tlhaho, eo haufinyane e bitsoang LNG, e etsa hore khase ea tlhaho e be mokelikeli ka ho pholisa khase ea tlhaho tlas'a khatello e tloaelehileng ho - 162 ℃. Liquefaction ea khase ea tlhaho e ka boloka haholo sebaka sa polokelo le lipalangoang, 'me e na le melemo ea boleng bo phahameng ba lik'halori, ts'ebetso e phahameng, e loketseng ho leka-lekana ha taolo ea mojaro oa litoropo, e loketseng ts'ireletso ea tikoloho, ho fokotsa tšilafalo ea litoropo joalo-joalo.

Liquefaction ke motheo oa tlhahiso ea LNG. Hajoale, lits'ebetso tse holileng tsa ho qoelisoa ha khase ea tlhaho haholo-holo li kenyelletsa ts'ebetso ea "cascade liquefaction", ts'ebetso e tsoakiloeng ea sehatsetsing le ts'ebetso ea ho qhibiliha ka metsi.

Cascade khase ea tlhaho liquefaction process e sebelisa lintlha tse fapaneng tse belang tsa sehatsetsi tlas'a khatello e tloaelehileng ho fokotsa mocheso oa sehatsetsi mohato ka mohato ho fihlela sepheo sa ho qhibiliha ha khase ea tlhaho.

Mixed refrigerant cycle (MRC) ke ts'ebetso eo ho eona mefuta e fetang e mehlano ea lihatsetsi tse tsoakiloeng tse nang le likarolo tse ngata, joalo ka C1 ~ C5 Hydrocarbons le N2, e sebelisoang e le maro a sebetsang ho condense, mouoane le ho holisa mohato ka mohato ho fumana matla a sehatsetsi maemong a fapaneng a mocheso, ebe butle-butle ho pholile le ho qhibilisa khase ea tlhaho. Ts'ebetso e tsoakiloeng ea liquefaction ea refrigerant e arotsoe ka mefuta e mengata e fapaneng ea potoloho ea sehatsetsi.

Ts'ebetso ea liquefaction e nang le expander e bua ka mokhoa oa ho qhibiliha ha khase ea tlhaho ka ho sebelisa sehatsetsi se phahameng sa khatello ho hlokomela sehatsetsing sa Claude cycle sehatsetsing se nang le katoloso ea adiabatic ea turbo expander.

Lenaneo la ts'ebetso haholo-holo le kenyelletsa: yuniti ea taolo ea khatello ea khase ea phepelo le metering, yuniti ea tlhoekiso ea khase ea tlhaho le yuniti ea liquefaction ea khase ea tlhaho, sistimi ea polokelo ea sehatsetsing, sistimi e potolohang ea sehatsetsing, polokelo ea LNG le yuniti ea ho kenya.

Khase ea tlhaho e kenang seteisheneng pele e feta ka har'a yuniti e laolang khatello le metering, e hlokomelang taolo ea khatello le metering ea khase ea tlhaho e kenang; Khase ea tlhaho e kena setsing sa tlhoekiso ea khase, moo khase ea tlhaho e leng tlas'a ho tlosoa ha CO2, ho tlosoa ha H2S le phekolo ea ho ntša metsi. Ts'ebetso ea MDEA e khothaletsoa bakeng sa decarbonization le ho tlosoa ha H2S, ts'ebetso ea ho felloa ke metsi ka molek'hule e nang le tora e meraro OR TEG ts'ebetso ea dehydration e khothaletsoa bakeng sa ho felloa ke metsi; 'Me Ho kgothaletswa ho sebelisa BOG e tsosolositsoeng le e hatelitsoeng bakeng sa khase ea tsosoloso;

Khase ea tlhaho e hloekisitsoeng ka har'a yuniti ea liquefaction ea khase ea tlhaho, sehatsetsing se tsoakiloeng (MRC liquefaction process) e khothaletsoa bakeng sa mokelikeli oa khase ea tlhaho; LNG e nang le liquefied e bolokiloe ka tanka ea polokelo, 'me mokhoa oa ho boloka sepakapaka le mocheso o tlase o buelloa bakeng sa polokelo ea LNG. Tanka e le 'ngoe ea sepakapaka e nang le mocheso o tlase oa mocheso o na le BG compressor,' me BOG compressor e sebelisetsoa ho hatella BOG pele e kena ka molecular sieve dryer Regeneration, ho itšetlehile ka pompo ea cryogenic ho finyella ho kenya.