Method and device for reutilization of natural gas pipe network pressure energy in gas turbine working domain

Abstract

The invention relates to a recycling method for natural gas pipe network pressure energy in the gas turbine working field and a device thereof, aiming at solving the problem of the loss of energy in the depressurization of high-pressure natural gas. The technical proposal is that the cold air flow and the hot air flow generated after the high-pressure natural gas is depressurized through a vortex tube are respectively outputted, the cold air flow after absorbing the inverse air in a heat exchanger and the heat of the exhaust gas of the gas turbine and being heated up joins with the hot air flow and enters a combustion chamber of the gas turbine set; the air cooled by the heat exchanger enters a compressor of the gas turbine set for boosting pressure and then is introduced to the combustion chamber of the gas turbine set; in the combustion chamber, the natural gas is combusted with the air to lead the gas turbine to work and drive energy-consumed equipment. The method of the invention selects the vortex tube to complete the depressurization and pressure adjustment of the natural gas and utilizes the low temperature natural gas flow to cool the intake air of the compressor to increase the mass flow of the intake air, thereby greatly increasing the output of the gas turbine and the economy and effectively utilizing the pressure energy.

Description

technical field [0001] The invention relates to a natural gas pressure energy recovery method and device, in particular to a natural gas pipeline network pressure energy recovery method and device based on vortex tube depressurization, and belongs to the technical field of gas storage and distribution. Background technique [0002] Natural gas is a high-quality, efficient and clean energy. In recent decades, the global natural gas industry has developed rapidly, and the proportion of natural gas in the world's primary energy structure has also continued to increase. It was 9.9% in 1981 and 23% at the end of the 20th century. At present, in some developed countries, this proportion has reached 25%. %above. my country is also accelerating the development of the natural gas industry. It is planned to make the proportion of natural gas in my country's energy consumption structure reach 6% by 2010 and 10% by 2020. [0003] Experience in the development of the natural gas indust...

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Problems solved by technology

However, vortex tubes are mainly used in refrigeration, separation of gas mixtures, drying of gases, etc., and there have been no reports of their use in the field of power generation by gas turbines.

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