Pressure Recovery and Cascade Utilization of Energy in the Process of Natural Gas Transportation

Natural gas is generally transported with high pressure, and most of the gas pressure is above 10MPa, which will be 0.4MPa after the vacuum treatment at pressure regulating station. So there is huge pressure energy that can be recovered. The research uses turbo expander instead of throttle valve in the natural gas transport process, which will avoid the threat and damage to the equipment and lower network by the low temperature natural gas. The huge demand for natural gas pipeline in China makes the research of “pressure recovery and cascade utilization of energy in the process of natural gas transportation” to be true. The research can not only avoid the huge waste of pressure in the network, but it can also improve the comprehensive utilization rate of energy, which is of vital importance to our conservation-oriented society today.