Recycling method and device for regenerated waste nitrogen in nitrogen purification process

Abstract

The invention discloses a recycling method and device for a regenerated waste nitrogen gas in a nitrogen gas purification process. The recycling method comprises the steps of assessing a water cooler on a regenerated waste nitrogen gas outlet pipeline of a nitrogen gas purification device; arranging a refrigerated dryer, a nitrogen gas buffer tank and an air micro-heat regeneration dryer in sequence behind the water cooler, wherein a gas outlet pipeline of the nitrogen gas buffer tank is connected to a regenerated gas inlet pipeline of the air micro-heat regeneration dryer; opening a valve on the regenerated waste nitrogen gas outlet pipeline to allow the regenerated waste nitrogen gas entering the water cooler for being cooled; freeze drying in the refrigerated dryer to obtain dry nitrogen gas; then buffering the dry nitrogen gas through the nitrogen gas buffer tank; introducing the nitrogen gas into the micro-heat regeneration dryer to regenerate and dry an activated alumina molecular sieve in the micro-heat regeneration dryer under purging of the dry nitrogen gas and at a high temperature of 160 DEG C; and releasing secondary regenerated waste nitrogen gas produced in a dry sieve through a release valve. By recycling the regenerated waste nitrogen gas in the nitrogen purification device, an object of saving energy and reducing consumption is realized.

Description

technical field [0001] The invention relates to a recovery technology for regenerating polluted nitrogen gas during nitrogen production, in particular to a recycling method and device for regenerating polluted nitrogen gas in the nitrogen purification process. Background technique [0002] At present, the technological process for producing high-purity nitrogen in large-scale gas stations is as follows: (1) Send the compressed air with a pressure of 0.7MPa produced by the centrifugal air compressor into the C-class filter to remove part of the dust, moisture and Impurities; (2) Send the compressed air into the refrigerated dryer, and further freeze the water molecules in the compressed air to condense and condense the water molecules in the compressed air into liquid water, entrain dust, and discharge the oil out of the refrigerated dryer to obtain dry compressed air with an atmospheric dew point of -20°C ;(3) Send the dry compressed air into the micro-heat regenerative drye...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a recycling method and device for regenerating polluted nitrogen gas in the process of nitrogen purification in order to solve the problem that the regenerated polluted nitrogen gas generated in the traditional nitrogen purification device is directly vented and treated, which wastes energy.

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