×

Gas-liquefying system including control means responsive to the temperature at the low-pressure expansion turbine

  • US 4,582,519 A
  • Filed: 08/07/1984
  • Issued: 04/15/1986
  • Est. Priority Date: 09/14/1983
  • Status: Expired due to Fees
First Claim
Patent Images

1. A gas liquefying system of the type in which a gas compressed by a circulation type compressor is cooled in a heat exchanger through a heat exchange with a returning gas of a low temperature, the cooled gas being then divided into a part which is to be used for the generation of cold heat and a part which is to be liquefied, the part of the gas for generation of cold heat being introduced into a high-pressure expansion turbine to generate the cold heat and, after an adjustment of the temperature thereof at the outlet of said high-pressure expansion turbine, supplied to a low-pressure expansion turbine to further generate the cold heat while becoming the returning gas of a low temperature, said returning gas being supplied to a liquefier to liquefy said part of gas to be liquefied and returned to said circulation type compressor after a recovery of temperature through a heat exchanger in said heat exchanger, said system comprising:

  • a heat exchanger, for gas passing through the turbines, disposed in the pipe between the outlet of said high-pressure expansion turbine and the inlet of said low-pressure expansion turbine and adapted for raising the temperature of the gas coming from said high-pressure expansion turbine;

    a first branch pipe and a second branch pipe for the gas to be liquefied, said first and second branch pipes shunting from each other at an upstream portion of said liquefier, said first branch pipe leading through said heat exchanger for gas passing through the turbines and merging in said second branch pipe at the downstream portion of said liquefier;

    automatic control valves disposed in said first and second branch pipes, respectively; and

    an automatic temperature controlling means for actuating said first and second automatic control valves upon sensing the gas temperature at the inlet or the outlet of said low-pressure expansion turbine.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×