Liquid nitrogen gasification cold energy recycling system

Abstract

The invention discloses a liquid nitrogen gasification cold energy recycling system. The liquid nitrogen gasification cold energy recycling system comprises power refrigeration equipment, a reaction kettle, a liquid nitrogen storage tank, a cooling water storage tank, a vaporizer and a liquid nitrogen cold energy recycling bin full of cooling water, wherein a liquid nitrogen inlet, a nitrogen outlet, a cooling water inlet and a cooling water outlet are respectively formed in side walls of a box body of the liquid nitrogen cold energy recycling bin; the vaporizer is arranged in the liquid nitrogen cold energy recycling bin; a liquid inlet of the vaporizer is communicated with the liquid nitrogen inlet of the liquid nitrogen cold energy recycling bin; a gas outlet of the vaporizer is communicated with the nitrogen outlet of the liquid nitrogen cold energy recycling bin; the liquid nitrogen storage tank is communicated with the liquid nitrogen inlet of the liquid nitrogen cold energy recycling bin; the nitrogen outlet of the liquid nitrogen cold energy recycling bin is communicated with the reaction kettle; the cooling water storage tank is communicated with the cooling water inlet of the liquid nitrogen cold energy recycling bin; and the cooling water outlet of the liquid nitrogen cold energy recycling bin is communicated with power refrigeration equipment. The liquid nitrogen gasification cold energy recycling system has the advantages that cold energy generated during gasification of liquid nitrogen is recycled fully, safe and smooth production is guaranteed, and the running cost of the power refrigeration equipment is reduced.

Description

technical field [0001] The invention relates to a liquid nitrogen gasification refrigeration recovery system. Background technique [0002] Nitrogen is generally used as a protective gas in the chemical production process to participate in and protect chemical reactions. Nitrogen is liquid nitrogen that is first vaporized by a vaporizer exposed to the air, and then transported to each reactor through a pipeline after decompression treatment. Since the vaporization of liquid nitrogen in the vaporizer mainly absorbs the heat of the air outside the vaporizer, the water in the air will form hoarfrost on the surface of the vaporizer under the action of the cold generated when the liquid nitrogen is vaporized, which will easily cause liquid nitrogen in the vaporizer. Incomplete gasification, when incompletely gasified nitrogen flows into the pipeline, it will continue to absorb heat and gasify, so that the pipeline operates at an extremely low temperature, which not only greatly ...

AI Technical Summary

Problems solved by technology

Since the vaporization of liquid nitrogen in the vaporizer mainly absorbs the heat of the air outside the vaporizer, the water in the air will form hoarfrost on the surface of the vaporizer under the action of the cold generated when the liquid nitrogen is vaporized, which will easily cause liquid nitrogen in the vaporizer. Incomplete gasification, when incompletely gasified nitrogen flows into the pipeline, it will continue to absorb heat and gasify, so that the pipeline operates at an extremely low temperature, which not only greatly shortens the service life of the pipeline, but also increases maintenance. cost, but also buried hidden dangers for the safe and smooth production

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