Large oxygen/nitrogen liquefying device with low-temperature refrigerating machine

• Main Authors: ZHANG FEIMING, WU ZHENGJUN, XU GENZHU, HOU XINGANG, YANG RONG, ZHANG YUZHE, SHANG YAXING
• Format: Patent
• Language: Chinese; English
• Published: 14.12.2016
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; MIXTURES BY PRESSURE AND COLD TREATMENT; REFRIGERATION OR COOLING; WEAPONS

A large oxygen/nitrogen liquefying device with a low-temperature refrigerating machine is mainly provided with a cyclic supercharger, a turbine pressurization expander, a liquefying cold box, the low-temperature refrigerating machine and a pipeline which is used for connecting equipment. An inlet of the cyclic supercharger is connected with a raw material nitrogen feeding pipe. A discharging pipe of the cyclic supercharger is connected with the pressurizing end of the expander to continuously pressurize compressed raw material nitrogen. An outlet pipe at the pressurizing end of the expander is connected into a front section pressure nitrogen heat exchange channel in a plate heat exchanger in the liquefying cold box, and the front section pressure nitrogen heat exchange channel exchanges heat with backflow low-temperature nitrogen. The front section pressure nitrogen heat exchange channel in the middle of the plate heat exchanger is provided with a drawing-out port connected with the externally arranged RU ref