Normal-pressure low altitude nitrogen recycling method for air separation unit

The invention provides a normal-pressure low altitude nitrogen recycling method for an air separation unit. According to the method, low-pressure nitrogen is pressurized by an oil-free screw compressor and fed into a pipe network used by a methanol gas washing and nitrogen extracting device, and the...

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Main Authors GUO JUNLIN, XIE ZHONGPING, YIN RUOKUI, LIANG CHUN, WU ZISONG, YANG TINGWEN, SHAO ZHENGJUN, CAO JIAN
Format Patent
LanguageChinese
English
Published 25.06.2014
Subjects
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Summary:The invention provides a normal-pressure low altitude nitrogen recycling method for an air separation unit. According to the method, low-pressure nitrogen is pressurized by an oil-free screw compressor and fed into a pipe network used by a methanol gas washing and nitrogen extracting device, and the nitrogen requirement of a synthesis ammonia device is met. According to the method, the resource waste brought by evacuation of low-pressure nitrogen is solved, and stable nitrogen amount of the synthesis ammonia device is further ensured.
Bibliography:Application Number: CN2014163503