Liquefaction system and method for NG (Natural Gas)
A natural gas and subsystem technology, applied in refrigeration and liquefaction, liquefaction, gas fuel and other directions, can solve the problems of high complexity and energy consumption of liquefaction system
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[0038] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples cited are only used to explain the present invention, and are not used to limit the scope of the present invention.
[0039] image 3 It is a structural diagram of the natural gas liquefaction system provided by the present invention. Such as image 3 As shown, the system includes:
[0040] Cold box 310; NG input pipe 32; No. 1 refrigerant liquefaction subsystem; No. 2 refrigerant liquefaction subsystem; heavy hydrocarbon separation tank 45; LNG storage tank 46;
[0041] The cold box 310 includes: NG pre-cooling channel 3111, NG deep cooling channel 3112, No. 1 refrigerant pre-cooling channel 3121, No. 2 refrigerant pre-cooling channel 3131, No. 1 refrigerant cooling channel 3122, No. 2 refrigerant cooling channel 3132 ;
[0042] The input end of the NG pre-cooling channel 3111 is connected to the NG input pipe 32 through the valve 320, the out...
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