High-purity nitrogen equipment

A high-purity nitrogen and equipment technology, applied in lighting and heating equipment, liquefaction, solidification and other directions, can solve the problem of high energy consumption, achieve the effect of low energy consumption, simple process configuration and material saving
CN101929790BActive Publication Date: 2012-07-18苏州制氧机股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
苏州制氧机股份有限公司
Publication Date
2012-07-18

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Abstract

The invention provides high-purity nitrogen equipment which comprises a preprocessing system, a purifying system and a fractionating tower, wherein the fractionating tower comprises a turboexpander, a main heat exchanger and a subcooler for heat exchange, a rectifying tower and a condensation evaporator, the rectifying tower comprises an upper tower and a lower tower, the outlet of the purifying system is connected with the air inlet of the lower tower through a pipeline, and the pipeline passes through the main heat exchanger; the lower tower is also provided with an oxygen-enriched liquid air outlet for oxygen-enriched liquid air generated by rectification to flow out, the oxygen-enriched liquid air outlet is connected with the purifying system through a pipeline, and the pipeline passes through the main heat exchanger; and the upper tower is provided with a nitrogen gas outlet, and the pipeline connected with the outlet passes through the main heat exchanger. In the invention, the pipeline of enriched oxygen, the pipeline of raw material air and the pipeline of nitrogen gas are simultaneously connected with the main heat exchanger, so that the cold quantities of the enriched oxygen and the nitrogen gas are fully utilized, and the high-purity nitrogen equipment saves the energy and protects the environment; meanwhile, the enriched oxygen is sent into the expander for refrigeration, and the high-purity nitrogen equipment has the advantages of reasonable structure, material saving and simple flow configuration.
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Description

technical field

[0001] The invention relates to a high-purity nitrogen device, in particular to a device for producing high-purity nitrogen by adopting a low-temperature rectification method. Background technique

[0002] Nitrogen is an industrial gas with a wide range of applications. It is mainly used in electronic packaging / chemical processing / lighting / heat treatment / food packaging / food freezing / metal manufacturing / glass production / petroleum refining / rubber crushing / biopharmaceuticals, etc.

[0003] The current high-purity nitrogen equipment mainly uses low-temperature rectification to produce high-purity nitrogen. As a traditional means of separation and purification, rectification has a history of hundreds of years, and it is widely used in metallurgy, chemical industry, glass, electronics and other industries. The raw material of high-purity nitrogen equipment is air, the production method is mainly low-temperature rectification, and the main consumption of the produ...

Claims

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