Method for purifying and liquefying coalbed gas

A coalbed methane and liquid technology, which is applied in the field of coalbed methane purification and liquefaction, can solve the problems of unsafe deoxidation after pressurization, unable to meet production needs, and small production capacity of daily processing raw coal seams, and achieves expansion of transportation and utilization radius, compression safety, etc. Guaranteed and improving the effect of gas extraction and drainage utilization

Inactive Publication Date: 2012-11-28
CNPC GREATWALL DRILLING ENG
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a coalbed methane purification and liquefaction method, which solves the problems in the prior art that it is not safe to pressurize first and then deoxidize, and the daily production capacity of raw coal seams is small, which cannot meet the production needs.

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 purifying and liquefying coalbed gas
  • Method for purifying and liquefying coalbed gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] exist figure 1 Among them, a process in the purification and liquefaction method of coalbed methane, deoxidation: the sulfur-resistant catalytic deoxidation process is that the raw material coalbed methane is mixed with part of the deoxygenated circulating gas in the gas tank at 70Kpa, and enters the reactor after being preheated by the preheater. In the temperature range of 500°C-700°C, methane and oxygen react in the catalyst bed to form CO 2 and H 2 O: After the high-temperature deoxygenation enters the preheater and the reaction raw material gas is transferred by heat, the waste heat boiler generates steam to recover heat, and enters the gas cabinet after cooling;

[0010] exist figure 2 Among them, the coalbed methane purification and liquefaction method is realized through the following processes: raw material coalbed methane - deoxygenation - pressurization - decarburization - dehydration - denitrogenation - storage and transportation: from figure 1 Pressuriz...

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 relates to a method for purifying and liquefying coalbed gas, the method is used for purifying and liquefying the exhausted oxygen-containing mixed coalbed gas of worked-out areas and mining areas, and the method is mainly realized through the following process: raw material coalbed gas-deoxidation-pressure boosting-decarburization-dehydration-denitrification-storage and transportation, wherein, the dioxidation is carried out as follows: the sulfur-tolerant catalytic deoxidation process mixes the raw material coalbed gas with part of deoxidizing circulating gas in a gas cabinet at 70KPa, the mixed gas enters a reactor after pre-heating by a pre-heater, methane and oxygen are reacted in a catalyst bed within a certain temperature range to generate CO2 and H2O; then the pressure boosting is carried out, the MEA plus MDEA decarburization process is adopted for decarburization, the physical absorption method is utilized for dehydration, the mixed refrigerant process is adopted for denitrification, and the storage and the transportation are carried out according to the standards. The method solves the problems that the deoxidization after pressure boosting is unsafe and the daily processing capacity of the raw material layer for production is small of the prior art. The method can be widely used for purifying and liquefying the exhausted oxygen-containing mixed coalbed gas of the worked-out areas and the mining areas.

Description

Technical field: [0001] The invention relates to a coal bed gas purification and liquefaction method for pumping and liquefying oxygen-containing mixed coal bed gas in goafs and active mining areas. Background technique: [0002] At present, domestic research on the purification and liquefaction of oxygen-containing coalbed methane has just started. In July 2007, Beijing Zancheng International Investment Co., Ltd. and Yangquan Coal Industry Group Co., Ltd. built the first oxygen-containing coalbed methane purification and liquefaction device in Yangquan, Shanxi. The volume is 5,000 cubic meters, and its technological process is: pressurization-decarbonization, sulfur-dehydration-liquefaction denitrogenation, deoxygenation-storage and transportation. The existing oxygen-containing coalbed methane purification and liquefaction process is pressurized first and then deoxidized. The problem with this method is that it is not safe, and the daily production capacity of raw coal sea...

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
Patent Type & Authority Patents(China)
IPC IPC(8): F25J3/00
Inventor 夏艳东王柱军梁红义陈德民吴辅兵
Owner CNPC GREATWALL DRILLING ENG
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