Natural gas differential pressure cold energy utilization device
A natural gas and pressure regulating device technology, which is applied in the direction of gas turbine devices, turbine/propulsion device cooling, engine cooling, etc., can solve the problems of wasting natural gas cold energy, wasting heat energy and electric energy, and achieve the effect of improving the efficiency of gas turbines
Active Publication Date: 2016-08-24
HUADIAN ZHENGZHOU MECHANICAL DESIGN INST
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is: the turbine power generation is to heat the natural gas before the natural gas enters the expander, which wastes the cold energy of the natural gas, and also wastes the heat energy and electric energy required for heating. In order to solve the above problems, a Natural gas differential pressure cold energy utilization device
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[0012] Such as figure 1 As shown, the filtered natural gas passes through the expander 1 for expansion and depressurization to generate electricity. The temperature of the expanded natural gas drops sharply. A temperature detection device 4 is installed at the outlet of the expander 1. When the outlet temperature is lower than the critical liquefaction pressure of the gas, it will Adjust the outlet pressure of expander 1 to increase the outlet gas temperature to prevent gas liquefaction.
[0013] The low-temperature natural gas from the expander 1 passes through the heat exchanger 2 installed at the inlet of the gas turbine compressor 3, and uses the heat exchange between the gas turbine intake air and the low-temperature natural gas to increase the temperature of the natural gas and reduce the temperature of the gas turbine intake air , improve the efficiency of gas turbine power generation.
[0014] After heat exchange, the natural gas passes through the temperature control...
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The invention relates to the technical field of fuel gas conveying and power generation, in particular to a natural gas differential pressure cold energy utilization device. The device comprises an expansion machine communicated with a natural gas inlet pipeline. Natural gas enters a pressure stabilizing and adjusting device through a heat exchanger after being expanded in the expansion machine, natural gas in the heat exchanger exchanges heat with inlet gas of a gas compressor of a gas turbine, the natural gas enters a combustion chamber or a gas-fired boiler through the pressure stabilizing and adjusting device, a natural gas pipeline at the front end of the expansion machine is provided with an adjusting valve II, the natural gas inlet pipeline is provided with a bypass pipeline connected with the pressure stabilizing and adjusting device, and the bypass pipeline is provided with an adjusting valve I. Compared with the prior art, low-temperature natural gas at an outlet of the expansion machine exchanges heat with air needed by the gas compressor of the gas turbine through the heat exchanger, cold energy of the outlet of the expansion machine can be utilized, the gas inlet temperature of the gas compressor of the gas turbine can be lowered, and gas turbine efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of gas transmission and power generation, in particular to a natural gas differential pressure cold energy utilization device. Background technique [0002] With the gradual completion of the West-East Gas Pipeline and the introduction of overseas liquefied natural gas, as well as the national requirements for energy conservation and emission reduction, natural gas, as a clean energy, is gradually replacing coal and becoming the main fuel for power plants. [0003] Natural gas in gas-fired power plants usually comes from pipelines, city gate stations, or LNG gasification. The gas source pressure is relatively high, and the gas inlet pressure required by gas turbines, gas boilers and other power plants is relatively low. Now commonly used turbine power generation is usually when natural gas enters the expansion Heating the natural gas in front of the machine wastes this part of cold energy, and also wastes he...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F02C6/00F02C7/18F01D15/10F01D17/00
CPCF01D15/10F01D17/00F02C6/00F02C7/18
Inventor 姚瑞锋李俊杨勇高林喜振雷华杰
Owner HUADIAN ZHENGZHOU MECHANICAL DESIGN INST