Natural-gas low-temperature helium extracting system and method

A natural gas and low temperature technology, applied in the field of natural gas low temperature helium extraction system, can solve the problems of high requirements on tower material, small average temperature difference, poor ability to change working conditions, etc., and achieve the effects of abundant adjustment means, high operating pressure and stable operation.

Active Publication Date: 2013-02-20
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF2 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the low temperature method, although the existing external refrigeration process can co-produce LNG, it has high energy consumption. However, in the pre-expansion refrigeration process, the operating pressure and operating temperature of the helium extraction tower are low High, in the case

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
  • Natural-gas low-temperature helium extracting system and method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] A low-temperature helium extraction system from natural gas, such as figure 1 Shown, including: raw gas cooler 1, primary concentration tower 2, secondary concentration tower 3, cryocooler 4, expansion unit 5, nitrogen compressor 6, cooling capacity adjustment tank 7, nitrogen buffer tank 8, etc. ,among them:

[0029] The left inlet of the raw gas cooler 1 is connected to helium-containing purified natural gas, and the bottom outlet and the inlet of the raw gas cooler 1 are respectively connected to the inlet and outlet of the evaporator at the bottom of the primary enrichment tower 2 through pipelines; the right of the raw gas cooler 1 The outlet is connected to the middle inlet of the first-stage enrichment tower 2 through a pipeline; the right-hand middle inlet of the raw gas cooler 1 is connected to the upper outlet of the first-stage enrichment tower 2 top condenser through a pipeline, and the low-pressure gas outlet at the bottom of the cryocooler 4 ; The left middl...

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 natural-gas flow-temperature helium extracting system and a natural-gas flow-temperature helium extracting method. According to the system and the method, the post-expansion and nitrogen circulating refrigerating two-column separating technology is carried out for fully recovering the cooling capacity of the device in order to pre-cool the natural gas which serves as the raw material, and thereby the system can be applied to the natural gas which has an extremely low content of helium, and has the characteristics of being low in energy consumption, high in helium recovery rate, small in investment, flexible in operation, and high in adaptability to variable working conditions. The system and the method have the positive effects that little helium in the helium-containing natural gas can be extracted by a pre-cooling system and a low-temperature rectifying system, an independent nitrogen circulating refrigerating system is adopted and used for supplying an ultralow-temperature cold source required in helium concentration, and the independent system is rich in adjusting means and cannot be influenced by upstream operations; and a post-expansion refrigerating system is adopted, so that the natural-gas low-temperature helium extracting system has the operation pressure higher than that in conventional technology, and higher concentration of the helium can also be obtained at the same refrigerating temperature.

Description

technical field [0001] The invention relates to a system and method for extracting helium from natural gas at low temperature. Background technique [0002] Because of its unique properties, helium has important uses in national defense and scientific research. With its low boiling point of -268.9°C, liquid helium can be used for ultra-low temperature cooling; used as a cleaning medium and pressurized propellant for liquid hydrogen fuel systems in rockets and aerospace; in superconductor applications that have attracted wide attention in fields such as suspension trains , helium is also indispensable. In addition, helium is used as superconducting electromagnet cooling in MRI equipment in the medical field, as a heat transfer medium in nuclear power plants, as cooling and inert gas protection in optical fiber production, and as a gas phase in instrumental analysis. Chromatography and other aspects of the carrier gas have been widely used. [0003] With the rapid developme...

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): F25J3/02
Inventor 龙增兵琚宜林刘家洪冼祥发钟志良郭成华杨晓秋刘泽军陈运强汪宏伟陶真汪贵孙林谌天兵陆永康蒲黎明刘志荣盛炳林李均方兰小平
Owner BC P INC CHINA NAT PETROLEUM 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