Nitrogen manufacturing system and method for manufacturing nitrogen with different purities

Abstract

The invention relates to the technical field of nitrogen manufacturing, and discloses a nitrogen manufacturing system and method for manufacturing nitrogen with different purities. The nitrogen manufacturing system comprises an air filter, an air separation tower, a gas tank and a gas tank, wherein the air filter is communicated with an air compressor; the air compressor presses air into an air cooler; the air cooler is communicated with an air drying purifier correspondingly; the air drying purifier removes impurities in air; the air drying purifier is communicated with the air separation tower; the air separation tower is communicated with a liquid nitrogen storage tank; the liquid nitrogen storage tank is communicated with a vaporizer correspondingly; the gas tank and the vaporizer are communicated with nitrogen tanks correspondingly through flow valves; and three groups of the nitrogen tanks are provided. According to the system and the method, air pretreatment is facilitated, impurities contained in nitrogen are reduced, the purity of the nitrogen is improved, meanwhile, the service life of the device is greatly prolonged, the damage rate of the device can be reduced, and nitrogen proportioning is faster.

Description

technical field [0001] The invention relates to the technical field of nitrogen production, in particular to a nitrogen production system and a production method for producing nitrogen with different purities. Background technique [0002] The chemical formula of nitrogen is N2, which is a colorless and odorless gas; the chemical properties of nitrogen are very inactive, and it can only react with hydrogen to form ammonia under high temperature, high pressure and catalyst conditions; it can combine with oxygen to form nitric oxide under the condition of discharge; even Ca Active metals such as , Mg, Sr and Ba can only react with them when heated. [0003] The existing patent (notification number: CN108731378A) and the nitrogen production system and the nitrogen production method for producing nitrogen with different purity can separate the waste gas containing a large amount of low-boiling impurities in the upper part of the condenser, and the waste gas is introduced into th...

AI Technical Summary

Problems solved by technology

[0003] The current existing patent (notification number: CN108731378A) and the nitrogen production system and the nitrogen production method for producing nitrogen with different purity can separate the waste gas containing a large amount of low-boiling impurities in the upper part of the condenser, and the waste gas is introduced into the pipe through the waste gas , The expansion turbine is introduced into the heat exchanger as a heat medium, and is released after heat exchange with the raw material air; the waste gas is introduced into the expansion turbine, and the temperature is reduced by the expansion turbine, and then it is introduced into the heat exchanger; the temperature is reduced The exhaust gas exchanges heat with the raw air in the heat exchanger, and the cooled raw air is introduced into the rectification section, so the expansion turbine can play the role of maintaining the cold and heat balance of nitrogen separation, but it lacks air filtration and Purification, in addition to affecting the purity of nitrogen due to the impurities in it, the deposition of frozen moisture and carbon dioxide in the air separation tower will block channels, pipes and valves, and the accumulation of acetylene in liquid oxygen may cause explosion hazards, and dust will wear and tear the operating machinery. And the pipes are used to prepare nitrogen with different purity, the effect is not strong enough, and it is difficult to accurately compare the purity ratio, so there is a gap between nitrogen with different purity

Images