Overlapped natural gas liquified system in mixed refrigerant cycling expansion machine

A mixed refrigerant and natural gas technology, applied in refrigeration and liquefaction, refrigerators, liquefaction, etc., can solve the problems of complex system control and expensive equipment costs, and achieve the effects of streamlining the liquefaction process, reducing investment costs, and compact structure

Inactive Publication Date: 2013-01-16
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

AP-X TM The disadvantage of the process is that the multi-stage refrigeration cycle is cascaded, the system control is complicated, and the equipment is expensive. A large number of compressors and wound heat exchangers are the main costs.

Method used

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  • Overlapped natural gas liquified system in mixed refrigerant cycling expansion machine
  • Overlapped natural gas liquified system in mixed refrigerant cycling expansion machine
  • Overlapped natural gas liquified system in mixed refrigerant cycling expansion machine

Examples

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Embodiment Construction

[0027] Such as figure 1 As shown, a cascade natural gas liquefaction system in a mixed refrigerant cycle expander, which includes a compressor module CU, a pre-cooling module PU, a condensation module LU and a liquefaction module EU; the high-pressure outlet pipe of the compressor module CU is connected to the pre-cooling module The high-pressure inlet pipe of the PU; the low-pressure inlet pipe of the compressor module CU is connected to the low-pressure outlet pipe of the condensing module LU; the high-pressure outlet pipe of the pre-cooling module PU is connected to the high-pressure inlet pipe of the condensing module LU; the high-pressure outlet pipe of the condensing module LU is connected to the liquefaction module The high-pressure inlet pipe of EU; the low-pressure inlet pipe of the condensing module LU is connected to the low-pressure outlet pipe of the liquefaction module EU.

[0028] Such as figure 2 As shown, the compressor module CU includes a main compressor 1...

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Abstract

The invention relates to the field of natural gas liquified systems in refrigeration and at low temperature, and in particular relates to an overlapped natural gas liquified system in a mixed refrigerant cycling expansion machine. The overlapped natural gas liquified system in the mixed refrigerant cycling expansion machine comprises a compressor module, a precooling module, a condensation module and a liquified module; multi-element mixed medias are adopted as refrigerants, MRC (mixed refrigerant cycling) and expansion machine refrigeration cycling are internally overlapped; the system runs reliably; the energy consumption is low; the load match is flexible, and the single line production energy is high; the liquified flow is simplified; the structure is compact; and the modular design is easy to adopt flexibly in various occasions.

Description

technical field [0001] The invention relates to the field of natural gas liquefaction systems in refrigeration and low temperature, in particular to a cascade natural gas liquefaction system in a mixed refrigerant cycle expander. Background technique [0002] LNG (Liquefied Natural Gas), that is, liquefied natural gas, is to cool the treated gaseous natural gas under normal pressure to -162°C to condense it into a liquid. The volume of LNG is about 1 / 625 of its gaseous volume, which greatly saves storage and transportation space and cost, and has the characteristics of large calorific value and high performance. Therefore, LNG is a clean and efficient energy source. China's energy structure is dominated by coal, with oil and natural gas accounting for only a small proportion. At present, the proportion of natural gas in China's energy consumption structure is only 4%, while in the world's energy consumption structure, natural gas consumption accounts for 24.1% of the total ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J1/02F25B7/00
Inventor 郭开华鹿来运张镨皇甫立霞何力
Owner SUN YAT SEN UNIV
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