Method for air separation by storing cold energy of liquefied natural gas

A liquefied natural gas and air separation technology, applied in the fields of air separation and liquefied natural gas cold energy storage, can solve problems such as impact and unstable utilization of cold energy, and achieve the effects of reducing energy consumption, reducing work costs, and improving work efficiency

Inactive Publication Date: 2010-09-15
CHINA NAT OFFSHORE OIL CORP +2
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This brings unstable factors to the utilization of cold energy, and it is bound to be greatly affected when applied to air separation devices.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for air separation by storing cold energy of liquefied natural gas
  • Method for air separation by storing cold energy of liquefied natural gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The air compressor 1 is communicated with the heat exchanger one 2 through pipelines; one side of the rectification column 4 is communicated with the heat exchanger one 2, and the other side is communicated with the heat exchanger two 6; the heat exchanger one 2 and the heat exchanger A circulating nitrogen compressor 3 is arranged on the pipeline communicated between the two 6, and the rectifying tower 4 is connected with the argon tower 5, the liquid oxygen storage tank 7, and the liquid nitrogen storage tank respectively through the pipeline 9; the argon tower 5 is connected with the liquid argon storage tank through the pipeline. The tank 10 is in communication; the heat exchanger 2 6 is in communication with the cold storage tank 8 through the brine pipeline 12 , and the cold storage tank 8 is in communication with the liquefied natural gas pipeline 11 .

[0015] Wherein the brine in the brine pipeline 12 is Freon R22, and the cool storage agent in the cold storage ...

Embodiment 2

[0017] The air compressor 1 is communicated with the heat exchanger one 2 through pipelines; one side of the rectification column 4 is communicated with the heat exchanger one 2, and the other side is communicated with the heat exchanger two 6; the heat exchanger one 2 and the heat exchanger A circulating nitrogen compressor 3 is arranged on the pipeline communicated between the two 6, and the rectifying tower 4 is connected with the argon tower 5, the liquid oxygen storage tank 7, and the liquid nitrogen storage tank respectively through the pipeline 9; the argon tower 5 is connected with the liquid argon storage tank through the pipeline. The tank 10 is in communication; the heat exchanger 2 6 is in communication with the cold storage tank 8 through the brine pipeline 12 , and the cold storage tank 8 is in communication with the liquefied natural gas pipeline 11 .

[0018] Wherein the brine in the brine pipeline 12 is 30% methanol solution, and the cool storage agent in the c...

Embodiment 3

[0020] The air compressor 1 is communicated with the heat exchanger one 2 through pipelines; one side of the rectification column 4 is communicated with the heat exchanger one 2, and the other side is communicated with the heat exchanger two 6; the heat exchanger one 2 and the heat exchanger A circulating nitrogen compressor 3 is arranged on the pipeline communicated between the two 6, and the rectifying tower 4 is connected with the argon tower 5, the liquid oxygen storage tank 7, and the liquid nitrogen storage tank respectively through the pipeline 9; the argon tower 5 is connected with the liquid argon storage tank through the pipeline. The tank 10 is in communication; the heat exchanger 2 6 is in communication with the cold storage tank 8 through the brine pipeline 12 , and the cold storage tank 8 is in communication with the liquefied natural gas pipeline 11 .

[0021] Wherein the brine in the brine pipeline 12 is dichloromethane, and the cool storage agent in the cold st...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for air separation by storing cold energy of liquefied natural gas. The method comprises the following steps that: a cold storing groove is formed between the liquefied natural gas and an air separation device, wherein the cold storing groove is filled with a coolant which is used for storing the cold energy released when the liquefied natural gas is gasified; heat is exchanged by using a secondary refrigerant and the coolant; and the heat is exchanged between the secondary refrigerant and recycled nitrogen gas in a heat exchanger for supplying cold energy to the air separation. Compared with the prior art, the method for air separation by storing the cold energy of the liquefied natural gas is characterized by improving work efficiency of the device, greatly reducing the energy consumption of the device, and reducing the work cost, along with high use ratio and stable cold supply.

Description

technical field [0001] The invention relates to the technical field of applied cold storage, in particular to a method for storing liquefied natural gas cold energy for air separation. Background technique [0002] Liquefied natural gas is a low-temperature (-162°C) liquid mixture obtained by deacidification and dehydration of natural gas, which is frozen and liquefied by a low-temperature process. Its main component is methane. The liquefied natural gas receiving station needs to gasify the liquefied natural gas before it can be delivered to users. A large amount of heat will be absorbed in the process of reheating gasification and used as fuel. In theory, the cold energy that can be recovered by liquefied natural gas is 870kJ / kg. At present, most of this cold energy is released into seawater, which is not only a great waste, but also has a great impact on seawater quality. With the rapid development of liquefied natural gas, the utilization of its cold energy will be pai...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F25J3/04F25J5/00
Inventor 张锦宝曲顺利仇德朋马继红张数义夏修庆
Owner CHINA NAT OFFSHORE OIL CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap