| 摘要 |
The instant invention provides a gas depressurization station, comprising a preheater for preheating a gas, an expander having an output shaft for expanding and depressurizing the gas, and an air compressor coupled to the output shaft for creating high pressure air for use in controlling the depressurization process. The invention is also directed to a method for safely depressurizing a gas, comprising: passing the gas through a preheater and a gas expander which drives an output shaft; driving an air compressor attached to said output shaft to produce compressed air; and controlling the pressure of said compressed air by means of control throttling means; whereby unwanted variations in the speed of rotation of said output shaft may be safely controlled by said control throttling means.
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