Method for Recovering the Energy of Gas Expansion and Recovery Device for Carrying out Said Method

摘要

1. Technical Result Increase in efficiency. 2. Essence A method comprising reducing the pressure of natural gas in two or more stages successively by converting the energy of a gas expansion into mechanical energy at each stage; after first and/or following stage of reducing pressure one part of the gas is utilized as a coolant and another part after first and/or following stage of reducing pressure or all the natural gas utilized as a coolant is used for the next stage of converting the energy of a gas expansion into mechanical energy. A gas expansion engine is embodied in two parts, which are arranged successively in the direction of the natural gas pressure control. The amount of heat transfer refrigerators 6 and 8 in the device is no less than that of the gas expansion engine, and the input of the heat transfer refrigerator coolant is connected to the appropriate part of the gas expansion engine. 3. Field of Application Gas industry.