| 摘要 |
1,014,711. Gas liquefaction process. PHILIPS GLOEILAMPENFABRIKEN N.V. Jan. 31, 1964 [Feb. 4, 1963], No. 4222/64. Heading F4P. A permanent gas to be liquefied is supplied periodically from a pressure vessel 1, Fig. 1, through a valved duct 2 to a condensation chamber 4 cooled by a cold gas refrigerator 3 and from which condensed gas is run into a collecting chamber 6 having a valved outlet duct 7 leading to a storage container (not shown) operating at about ambient pressure, the gas supply valve 8 being closed after a predetermined time and condensed gas in chamber 4 being further cooled by the refrigerator 3 until the pressure therein and in chamber 6 falls to that of the storage container after which the outlet valve 9 is opened to effect discharge of chambers 4, 6. Valve 9 is then closed and valve 8 opened at the start of the next condensation cycle. As shown, valve 8 is controlled by a device 10 responsive to the level of liquid in chamber 6 and valve 9 is controlled by a device 11 responsive to gas pressure in chamber 6. In a modification the valves are controlled by a timing device. In a further modification a gas supply duct 32, Fig. 3, leads to a condensation chamber 34 cooled by a refrigerator 33 and from which condensed gas is run through one or other of valved ducts 35, 36 to cooling chambers 37, 38 cooled by refrigerators 45, 46 and having valved outlet ducts 39, 40 leading to a storage container (not shown). In operation valves 41, 42 are initially closed, valve 43 is closed and valve 44 open until such time that pressure in chamber 37 is reduced by the cooling thereof sufficient to allow outlet valve 41 to be opened by pressure responsive control means 48. The resulting drop in level in chamber 37 then causes control means 47 to close valve 43 and open valve 44 thereby allowing cooling of liquefied gas to be continued in chamber 38. |
