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CRYOGENIC SEPARATION PROCESS OF COMPRESSED MATERIAL AIR FOR PRODUCING ELEVATED PRESSURE OXYGEN AND NITROGEN PRODUCT
CRYOGENIC SEPARATION PROCESS OF COMPRESSED MATERIAL AIR FOR PRODUCING ELEVATED PRESSURE OXYGEN AND NITROGEN PRODUCT
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机译:用于生产高压氧和氮产物的压缩空气的低温分离工艺
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摘要
PURPOSE: To produce elevated pressure oxygen and nitrogen products through low pressure distillation of air by cooling a portion of material air through indirect heat exchange with boosted nitrogen rich flow thereby condensing it partially and then withdrawing an oxygen flow and a vapor flow containing a specified quantity of nitrogen from a low pressure column. ;CONSTITUTION: Oxygen rich column bottom liquid from a high pressure column 5 in a pipe line 10 is fed from an intermediate part to a low pressure column 6 and that flow is distilled in the low pressure column 6 along with liquid air being fed to the top of the low pressure column 6 in a pipe line 162 and separated into a liquid oxygen column bottom liquid and nitrogen rich column top product containing at least 80% of nitrogen. A portion of the liquid oxygen column bottom liquid in the pipe line 20 is withdrawn from the bottom of the low pressure column 6 and separated into a liquid oxygen product and a gas oxygen product gasified through a heat exchanger 1. The nitrogen rich column top product is withdrawn from the top of the low pressure column 6 through a pipe line 30. According to the method, elevated pressure oxygen and nitrogen product can be produced through low pressure distillation of air.;COPYRIGHT: (C)1995,JPO
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