Ke kumu o ka hoʻomaʻamaʻa mua ʻana no ka mea kanu LNG

Wehe i nā haumia ʻino i loko o ke kinoea hānai a me nā mea hiki ke paʻa i ka wā cryogenic. E like me ka hydrogen sulfide, carbon dioxide, wai, hydrocarbon kaumaha a me ka mercury. ʻOkoʻa ke kinoea hānai e mālama ʻia e nā ʻano mea kanu LNG, no laila ʻokoʻa nā ʻano hana a me nā kaʻina hana.
ʻO ke kinoea ʻakika ma ke ʻano he H2S, CO2, cos, RSH a me nā mea haumia ʻē aʻe. ʻO ka wehe ʻana i ke kinoea waikawa i kapa ʻia ʻo desulfurization a decarbonization, a i ʻole desulfurization maʻamau. Ke hoʻomaʻemaʻe kinoea maoli, hiki ke hoʻoneʻe ʻia ka H2S a me CO2 i ka manawa like, no ka mea hiki ke wehe pū ʻia kēia mau ʻāpana ʻelua ma ke ʻano amine alcohol a me ka molecular sieve adsorption hoʻomaʻemaʻe.
2.3.2 koho o ke ano desulfurization
I loko o ka hui hoʻoheheʻe kinoea maoli, aia ʻekolu mau ʻano hoʻomaʻemaʻe maʻamau, ʻo ia ke ala amine alkohol, ke ʻano potash wela (benfied) a me ke ʻano sulfonol amine.
Mercury: hiki i ka hiki ʻana o ka mercury ke hōʻino nui i nā lako alumini. Ke noho nei ʻo Mercury (me ka mercury elemental, nā ʻona mercury a me nā pūhui mercury organik), e hana ka alumini me ka wai e hana i nā huahana ʻino pauda keʻokeʻo, kahi e hōʻino nui ai i nā waiwai o ka alumini. ʻO ka nui liʻiliʻi o ka mercury ua lawa i mea e hōʻino nui ai i nā lako alumini, a ʻo Mercury hoʻi e hoʻopōʻino i ke kaiapuni a me ka pōʻino i nā limahana i ka wā mālama. No laila, pono e kaupalena ʻia ka ʻike o ka mercury. Hoʻokumu ʻia ka wehe ʻana o Mercury ma ka hopena o ka mercury a me ka sulfur i loko o kahi reactor catalytic.
ʻO ka hydrocarbon kaumaha: e pili ana i nā hydrocarbons ma luna o C5 +. I loko o ka hydrocarbons, ke hoʻololi ke kaumaha molekala mai ka liʻiliʻi a i ka nui, hoʻololi kona wahi paila mai ka haʻahaʻa a i ke kiʻekiʻe. No laila, i ka pōʻai o ka condensing maoli kinoea, kaumaha hydrocarbons mau condensed mua. Inā ʻaʻole i hoʻokaʻawale mua ʻia ka hydrocarbon kaumaha, a i ʻole hoʻokaʻawale ʻia ma hope o ka condensation, hiki i ka hydrocarbon kaumaha ke maloʻo a paʻa i nā mea hana. Hoʻokaʻawale ʻia nā hydrocarbons kaumaha e ka molecular sieve a me nā adsorbents ʻē aʻe i ka wā dehydration, a hoʻokaʻawale ʻia ke koena e ka hoʻokaʻawale cryogenic.
Cos: hiki ke hoʻomaʻemaʻe ʻia e kahi wai liʻiliʻi loa e hana i ka H2S a me CO2, e hoʻoheheʻe ai i nā mea hana. Maʻalahi e hui pū me ka propane i hoʻihoʻi ʻia. Hoʻopau pinepine ʻia me H2S a me CO2 i ka wā deacidification.
Helium: ʻO ke kinoea maoli ke kumu nui o ka helium a pono e hoʻokaʻawale ʻia a hoʻohana ʻia. Loaʻa iā ia ka waiwai hoʻohana kiʻekiʻe e ka hui pū ʻana o ka wehe ʻana o ka membrane a me ka hoʻokaʻawale cryogenic.
Nitrogen: ʻo ka hoʻonui ʻia ʻana o kāna ʻike e paʻakikī i ka hoʻoheheʻe kinoea maoli. Hoʻohana pinepine ʻia ke ala uila hope loa no ka wehe ʻana i ka LNG.
ʻO ka mea nui o ke kinoea maoli he methane (CH4), a ʻo kona wahi paila maʻamau ʻo 111k (- 162 ℃).
ʻO 426kg / m3 ka nui o ka methane wai ma ka pae paila maʻamau, a ʻo ka nui o ke kinoea methane ma ke kūlana maʻamau ʻo 0.717kg/m3, me ka ʻokoʻa ma kahi o 600 mau manawa. ʻO ka ʻokoʻa nui o ka leo ke kumu nui o ka mālama ʻana i ke kinoea kūlohelohe liquefied a me ka lawe ʻana.


Ka manawa hoʻouna: Dec-03-2021