Apparatus for rapidly gasifying liquid nitrogen through circulating water bath, and operating method thereof

Abstract

The invention provides an apparatus for rapidly gasifying liquid nitrogen through circulating water bath, and an operating method thereof. The apparatus comprises a pressure cryogenic liquid tank C1, a boost gasifier C2, a circulating water bath liquid nitrogen gasifier C3, a water cooling tower circulating water collecting pool C4 and a control valve C18; the bottom of the pressure cryogenic liquid tank C1 is connected with the circulating water bath liquid nitrogen gasifier C3 through the control valveC18, liquid nitrogen from the pressure cryogenic liquid tank C1 is heated by flowing circulating water and gasifies, the gasified liquid nitrogen enters a nitrogen pipe network system C5, and the flowing circulating water is from the water cooling tower circulating water collecting pool C4. The apparatus can realize the emergent rapid demands of a nitrogen system, can complete preset operation within 1-2min, gasifies liquid nitrogen to form nitrogen, and sends nitrogen to the nitrogen pipe network, and the liquid tank with a proper volume is selected according to production process requirements to maintain a liquid nitrogen emergency gasifying device within a certain time in order to win precious time to deal with unexpected accidents.

Description

technical field [0001] The invention belongs to the technical field of separation of oxygen and nitrogen from cryogenic liquefied air in industrial production, gasification of liquid nitrogen and compression transportation, and in particular relates to a circulating water bath liquid nitrogen rapid gasification device and an operation method. Background technique [0002] In large-scale industrial production, there are generally supporting scale air separation units, and the separated nitrogen is transported to the pipe network through compression, which is used by each production unit as emergency replacement of equipment containers, sealing and isolation, and conveying materials. The continuous and stable supply of nitrogen Very important. However, in the long-term production, due to the constraints of certain conditions, it is inevitable that the abnormal operation of the air separation unit needs to be reduced, the nitrogen compressor suddenly stops in chains, and the ex...

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Problems solved by technology

The steam water bath liquid nitrogen gasification system has a complicated process and cumbersome operation. It needs to pre-cool the liquid pump, boil the water pump, and pass the steam. It usually takes more than 30 minutes, especially in the cold winter climate in northern China. It is more difficult to start. There is a problem of freezing blockage in the water system and steam system, and it cannot provide emergency nitrogen supply. However, the equipment has a compact structure and a small footprint. Once it is put into use, it can run stably for a long time

The air bath liquid nitrogen gasification system has a simple process and relatively simple operation, but the equipment is bulky, and the operation of the equipment is affected by rainy weather or winter rain and snow in northern China.

The existing steam water bath liquid nitrogen gasification system consumes a lot of steam and electric energy; the process is relatively complicated, the operation is cumbersome, and it is more restricted by external conditions; the start-up time is relatively long

The existing air bath liquid nitrogen gasification process is greatly affected by the regional climate

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