Comparison of nitrogen sources for nitrogen generators

Liquid nitrogen is a product of cryogenic air separation Nitrogen Production. Under standard conditions, 1m3 of liquid nitrogen can be gasified into 643m3 of nitrogen, but the actual utilization rate during use is generally around 95%, that is, 1m3 of liquid nitrogen can actually utilize about 610m3 of nitrogen. At present, the average market price of liquid nitrogen is about 1,000 yuan/m3, and the unit price of nitrogen is 1.67 yuan/m3. When using liquid nitrogen, users must be equipped with liquid nitrogen storage tanks, gasifiers corresponding to the flow rate, and pressure regulating valves corresponding to the pressure, which are necessary initial investments.

 Membrane separation air separation nitrogen production is also a new branch of non-cryogenic nitrogen production. It is a new nitrogen production method that has developed rapidly abroad in the 1980s. It uses air as raw material and uses the different permeation rates of oxygen and nitrogen in hollow fiber membranes under a certain pressure to separate oxygen and nitrogen to produce nitrogen. Compared with the above two nitrogen production methods, it has the characteristics of simpler equipment structure, smaller size, no switching valves, easier operation and maintenance, faster gas production (within 3 minutes), and more convenient capacity expansion.