At present, the commonly used nitrogen supply methods are: bottled nitrogen transport, liquid nitrogen transport, pipeline transport, cryogenic separation, PSA pressure swing adsorption separation, VPSA vacuum analytical separation, membrane separation.

First, to determine the flow, first of all, we usually use the volume of a standard bottle of nitrogen is about 40L, the amount of nitrogen oxygen inside is 6Nm3, and often the actual use of the user is only 4.5-5Nm3, the rest can not be played out, the reason is that if the gas supply manufacturers let the user will use up the gas, then each time to wash the bottle, Second, it also has a certain relationship with the pressure, so you must first know how many cylinders of gas you use a day, and then how many hours of these cylinders of gas are used up, if you use 10 bottles of gas, it is 10 hours of use, then your hourly consumption is about 1 bottle, and the actual consumption of a bottle is about 5 quantities. So the flow rate should choose 5Nm3/h,

Second, determine the purity, in general, there will be a purity in the cylinder gas, you just need to look at it yourself, if there is no concept, then you to the peer, or design institute, nitrogen machine manufacturers to consult the specific purity, according to the specific use of nitrogen has a relationship.

At present, several nitrogen production methods have their own advantages, but PSA has the highest market share, followed by air separation equipment, and then VPSA nitrogen production, which is determined according to the specific amount, and purity, if the amount is large, high purity (99.99% or more), such as 1000 cubic meters or more, you can choose cryogenic, if smaller than this, Low purity (more than 90%,) it is recommended to choose PSA pressure swing adsorption nitrogen machine, if the initial degree is low, the flow rate is large, you can choose VPSA vacuum analysis, but the membrane separation is basically no longer used on the market.

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Oxygen generator: PSA pressure swing adsorption oxygen production equipment; VPSA pressure swing adsorption oxygen production equipment; Cryogenic air separation oxygen and nitrogen equipment;

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