High-pressure natural gas pressure energy refrigeration method for junked tire cryogenic pulverization
A technology for low-temperature crushing and waste tires, which is used in refrigerators, refrigeration and liquefaction, compressors, etc., can solve the problems of ice blockage, inability to meet the needs of producing fine rubber powder, and high temperature of cold energy when natural gas is cooled in pipelines. The effect of saving investment and operating costs, promoting recycling, and reducing operating costs
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[0049] Example one
[0050] A high-pressure natural gas pressure energy refrigeration method for low-temperature crushing of waste tires. The process flow is as follows figure 1 As shown, two expanders are used to achieve a two-stage depressurization of high-pressure natural gas, and nitrogen is used as the refrigerant.
[0051] The pressure of the high-pressure natural gas transported from the main natural gas pipeline network (high-pressure pipeline network) to the urban natural gas pressure regulating station is 4.0MPa (absolute pressure), the temperature is 15.0℃, and its volume composition is: methane 94.844%, ethane 2.353%, and propane 0.309 %, butane 0.079%, pentane 0.042%, hexane 0.032%, nitrogen 1.656%, carbon dioxide 0.655%, water 0.03%; the water dew point of the pipeline natural gas at 4.0MPa is 5.0℃, and the water dew point at 0.5MPa It is -15.0°C. In the natural gas pressure regulating station, the 4.0MPa high-pressure natural gas needs to be depressurized to 0.5MPa ...
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[0060] Example two
[0061] A high-pressure natural gas pressure energy refrigeration method for low-temperature crushing of waste tires. The process flow is as follows figure 2 As shown, an expander is used, and the refrigerant is nitrogen.
[0062] The pressure of the natural gas transported from the main natural gas pipeline network (high-pressure pipeline network) to the urban natural gas pressure regulating station is 1.6MPa (absolute pressure), the temperature is 15.0℃, and its volume composition is: methane 94.844%, ethane 2.353%, and propane 0.309% , Butane 0.079%, pentane 0.042%, hexane 0.032%, nitrogen 1.656%, carbon dioxide 0.655%, water 0.03%; the water dew point of the pipeline natural gas at 1.6MPa is -2.7℃, the water dew point at 0.5MPa It is -15.0°C. In the natural gas pressure regulating station, 1.6MPa high-pressure natural gas needs to be depressurized to 0.5MPa before entering the urban medium-pressure natural gas pipeline network (medium-pressure pipeline net...
Example Embodiment
[0071] Example three
[0072] A high-pressure natural gas pressure energy refrigeration method for low-temperature crushing of waste tires. The process flow is as follows image 3 As shown, two expanders are used, and the refrigerant is air.
[0073] The pressure of natural gas transported from the main natural gas pipeline network (high-pressure pipeline network) to the urban natural gas pressure regulating station is 4.0MPa (absolute pressure), the temperature is 15.0℃, and its volume composition is: methane 94.844%, ethane 2.353%, and propane 0.309% , Butane 0.079%, pentane 0.042%, hexane 0.032%, nitrogen 1.656%, carbon dioxide 0.655%, water 0.03%; the water dew point of this pipeline natural gas at 4.0MPa is 5.0℃, and the water dew point at 0.5MPa is -15.0°C. In the natural gas pressure regulating station, the 4.0MPa high-pressure natural gas needs to be depressurized to 0.5MPa before entering the urban medium-pressure natural gas pipeline network (medium-pressure pipeline net...
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