Apparatus for recovering natural gas in a mine

Details Apparatus for recovering natural gas in a mine Apparatus for recovering natural gas in a mine

1981-01-19

1982-03-23

Capossela, Ronald C.

Refrigeration

Storage of solidified or liquified gas

Storing solidified gas

62 55, 62239, F17C 1300

Patent

active

043206271

ABSTRACT:
Method and apparatus are disclosed for the recovery and removal of natural gas from a mine by liquefying and collecting the gas within the mine, and then transporting the liquified gas to the surface in a mobile tank. Natural gas is withdrawn from bore holes in a coal mine and liquefied using liquid nitrogen. A unique apparatus permits both the liquid nitrogen and the liquefied natural gas to be contained within a same insulated tank, enhancing the portable characteristics. Liquid nitrogen and its vapor are used to cool the natural gas so as to separate water and CO.sub.2. Means are disclosed for controlling the cooling by the cryogenic liquid by regulating the venting flow rate of its vapor in response to the pressure of the liquefied natural gas. The disclosed system eliminates the need for extensive piping and on-site pumping associated with conventional degasification processes.

REFERENCES:
patent: 2784560 (1957-03-01), Johnson, Jr.
patent: 2834187 (1958-05-01), Loveday
patent: 3283530 (1966-11-01), Bayne et al.
patent: 3358472 (1967-12-01), Klipping
patent: 3714942 (1973-02-01), Fischel et al.

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