Natural gas liquefying device based on low-temperature liquid refrigeration
A low-temperature liquid and liquefaction device technology, applied in the field of gas liquefaction, can solve problems such as restrictions on liquefied natural gas, system design, operation and maintenance difficulties, and achieve the effect of overcoming manufacturing restrictions
Inactive Publication Date: 2011-05-18
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
However, the manufacturing level of key power equipment such as compressors limits the production scale of liquefied natural gas (LNG), and makes system design, operation and maintenance more difficult
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[0008] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.
[0009] Such as figure 1 As shown, the present invention includes a main heat exchanger 1, a low-temperature liquid refrigeration unit, and a natural gas throttling refrigeration unit.
[0010] The main heat exchanger 1 is the key place for natural gas liquefaction. The preferred type is a plate-fin heat exchanger, a wound tube heat exchanger or other heat exchangers, which can be one or more series or parallel plate-fin heat exchangers. Heater, or a combination of one or more series and parallel plate-fin heat exchangers and wound tube heat exchangers.
[0011] The cryogenic liquid used refers to liquid nitrogen with low manufacturing cost and mature technology (it can also be liquid air, liquid oxygen or liquid argon, using liquid oxygen or liquid argon cooling capacity, suitable for occasions where the amount of oxygen or argon is large) and other cryo...
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The invention provides a natural gas liquefying device based on low-temperature liquid refrigeration, mainly comprising a main heat exchanger, a natural gas throttling refrigeration unit and a low-temperature liquid refrigerating unit. The natural gas liquefying device based on low-temperature liquid refrigeration is characterized by adopting the latent heat and the sensible heat of low-temperature liquid gasification as cold sources for cooling, liquefying and supercooling natural gas in the low-temperature liquid refrigerating unit, thereby lowering or eliminating the evaporating rate of the liquefied natural gas, reducing the technical requirement on the filling equipment and operation and realizing large refrigerating capacity and the natural gas liquefaction circulation with the remotely separated refrigeration and liquefaction.
Description
Technical field [0001] The invention relates to the field of gas liquefaction, in particular to a natural gas liquefaction device. Background technique [0002] The volume of methane-based natural gas after liquefaction is only about 1 / 625 of the original volume. The liquefaction of natural gas is an economical and effective method for large-scale storage and long-distance transportation. There are currently three main types of natural gas liquefaction cycles: cascade refrigeration cycles (or "cascade" cycles), mixed refrigerant liquefaction cycles, and liquefaction cycles with expanders. The above methods are widely used and the technology is relatively mature. However, the manufacturing level of key power equipment such as compressors limits the production scale of liquefied natural gas (LNG), and makes system design, operation and maintenance more difficult. Summary of the invention [0003] The present invention proposes a natural gas liquefaction device based on cryogenic l...
Claims
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IPC IPC(8): F25J1/02
CPCF25J1/0022F25J1/0012F25J1/0015F25J1/0017F25J1/002F25J1/0052F25J1/0212F25J1/0223F25J1/0264F25J2210/06F25J2210/40F25J2210/42F25J2210/50F25J2210/58F25J2220/62F25J2220/64F25J2235/60F25J2240/40F25J2290/34
Inventor 舒水明孙川丁国忠胡兴华张晓青江蓉黄罡
Owner HUAZHONG UNIV OF SCI & TECH