Title:
METHOD FOR PREPARING COALBED METHANE HYDRATE
Document Type and Number:
WIPO Patent Application WO/2017/088753
Kind Code:
A1
Abstract:
A method for preparing a coalbed methane hydrate. Coalbed methane forms micro bubbles by means of a gas distributor, enters an inner circulation reactor from the bottom, and has a hydration reaction by being in contact with a low-temperature and high-pressure water flow so as to generate coalbed methane hydrate slurry, and reaction heat is removed by a refrigeration unit. The reactor is provided with an inner circulator so as to form a buoyancy adjusting area, thereby promoting the separation efficiency of a gas-water-hydrate multi-phase system, realizing the fine control over a heat and mass transfer process, and increasing the gas content of a hydrate. Unreacted gas flows through the inner circulator, is then separated from the water and the hydrate, and is recycled back to the reactor; and the hydrate slurry flows through the inner circulator to realize liquid-solid separation, and separately flows in a light phase flow channel and a heavy phase flow channel. The hydrate slurry is discharged into an intermediate storage tank for carrying out gas-liquid and liquid-solid separation; after being concentrated, the slurry is separated to obtain a 'dry' hydrate product; and the separated unreacted gas and low-temperature water are recycled back to a reaction system. The method is capable of continuously, stably and efficiently preparing the hydrate.
Inventors:
ZHANG JIANWEN (CN)
XIN YANAN (CN)
ZHOU FENG (CN)
YANG LIN (CN)
XIN YANAN (CN)
ZHOU FENG (CN)
YANG LIN (CN)
Application Number:
PCT/CN2016/106900
Publication Date:
June 01, 2017
Filing Date:
November 23, 2016
Export Citation:
Assignee:
UNIV BEIJING CHEMICAL TECH (CN)
CHINA SOLID GAS ENERGY TECH (BEIJING) CO LTD (CN)
CHENGDU QIANNENG TECH CO LTD (CN)
CHINA SOLID GAS ENERGY TECH (BEIJING) CO LTD (CN)
CHENGDU QIANNENG TECH CO LTD (CN)
International Classes:
C10L3/10
Foreign References:
CN105779049A | 2016-07-20 | |||
CN205223137U | 2016-05-11 | |||
CN103571557A | 2014-02-12 | |||
CN203620609U | 2014-06-04 | |||
CN1281420A | 2001-01-24 | |||
US6192691B1 | 2001-02-27 |
Attorney, Agent or Firm:
BEIJING SIHAI TIANDA INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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