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Natural gas isobaric liquefaction device

A technology of liquefaction equipment and natural gas, applied in the field of pressure liquefaction equipment, can solve the problems of reducing energy consumption, high energy consumption, equipment maintenance and material reserve reduction, etc.

Active Publication Date: 2013-06-12
NANJING RECLAIMER ENVIRONMENTAL TEKNIK
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  • Description
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Problems solved by technology

[0028] The purpose of the present invention is to solve the incompleteness of Carnot's theorem applied to the theoretical analysis of the natural gas liquefaction plant cycle, to propose a new refrigeration theory corresponding to the thermodynamic theory, that is, the cold dynamics theory, and to propose a new natural gas isobaric system designed using this principle. The liquefaction device overcomes the shortcomings of the traditional natural gas liquefaction process such as complexity, high energy consumption, and excessive public facilities such as circulating cooling water systems, retains and develops the advantages of the liquefaction process with an expander, and greatly reduces energy consumption by more than 30%. , and at the same time realize the isobaric condensation of natural gas, greatly reduce equipment maintenance and material reserves, thereby realizing the transformation of natural gas liquefaction technology

Method used

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Embodiment 1

[0096] Such as Figure 6 Shown, a kind of natural gas isobaric liquefaction device, refrigerant adopts nitrogen, specific embodiment is as follows:

[0097] (1) The raw natural gas 1 is removed by the pretreatment device 2 to remove moisture and carbon dioxide, and then enters the cold exchanger 3 and the heavy hydrocarbon separator 4 to separate the liquid heavy hydrocarbon component 5, and then passes through the cold exchanger 6 to become the pre-cooled feed gas 7 into the tower ;

[0098] (2) The pre-cooled feed gas 7 entering the tower enters the lower tower 8, and the subcooled methane liquid generated by the condensing evaporator 9 is refluxed for rectification, and isobarically condensed to produce liquefied natural gas 11, namely LNG1, and the LNG is sent to the LNG storage tank 12;

[0099] (3) The pure methane liquid 13 produced by isobaric condensation in the condensing evaporator is introduced into the liquid pure methane storage tank 14;

[0100] (4) The liquid...

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Abstract

The invention relates to a natural gas isobaric liquefaction device. A Rankine cycle system of similar heat energy power cycle devices at a low temperature end is adopted, a cryogenic liquid pump is adopted to input power, and cold is compensated for the natural gas liquefaction device through refrigerant so as to realize the isobaric liquefaction of natural gas. On the premise of the same refrigerating capacity, compared with the conventional advanced unit, the natural gas liquefaction device disclosed by the invention can save energy by more than 30%, breaks through the conventional natural gas liquefaction technology, and has obvious economical, social and environment-friendly benefits.

Description

technical field [0001] The invention relates to a natural gas isobaric liquefaction device, specifically belonging to the technical field of deep freezing. Background technique [0002] Natural gas is a high-quality and clean fossil energy, which plays a very important role in the national economy. The liquefaction and storage of natural gas is the key technology for its development and utilization. It has formed an industry at home and abroad, with an average annual growth rate of 8%. In recent years, it has grown rapidly in China's energy consumption structure. Liquefied natural gas technology has become a high-tech technology, which has been valued by more and more scientific and technological disciplines. [0003] It is estimated that by the middle of this century, if China consumes 5000*10 natural gas 8 m 3 / a, of which imported LNG1000*10 8 m 3 / a calculation (equivalent to Japan's current import volume), the available cold energy equivalent to electric energy is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J1/02
CPCF25J3/0209F25J3/0233F25J3/0257F25J2200/06F25J2200/20F25J2205/04F25J2210/42F25J2215/04F25J2235/42F25J2240/12F25J2240/90F25J2270/904F25J2220/64F25J1/0022
Inventor 王海波
Owner NANJING RECLAIMER ENVIRONMENTAL TEKNIK
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