来源：https://www.sdqyjn.com/ 日期：2021-07-28 浏览量：
At present, the commonly used nitrogen supply methods include bottled nitrogen transportation, liquid nitrogen transportation, pipeline transportation, cryogenic separation, PSA pressure swing adsorption separation, VPSA vacuum analytical separation and membrane separation.
1、 To determine the process, first of all, we need to know that generally, we usually use bottled nitrogen. The standard bottle has a volume of about 40L and contains 6nm3 of nitrogen and oxygen content. The actual amount is only 4.5-5nm3 for users who often use it. The rest is not called out because they want users to supply the manufacturer's gas lamp and wash the bottle every time, but it also has a certain relationship, You first need to know the amount of gas in the cylinder all day, and then how many hours you use up. If you use 10 bottles of gas, it is light for 10 hours. You should have about 1 bottle per hour, and the amount of one bottle is 5M3. Therefore, the flow shall be 5M3 / hour.
2、 To determine its purity, generally speaking, the gas in the cylinder will be pure. You only need to look at your own will. If there is no concept, you have a companion, or a design institute, or a manufacturer of nitrogen making mechanism to consult the specific purity, which should be based on the specific relationship between the use of nitrogen.
3、 At present, several nitrogen methods have their own advantages, but PSA has a high market share, followed by air separation equipment, and then vacuum pressure swing adsorption of nitrogen, which depends on the specific amount and purity. If the amount is large and the purity is more than 99.99%), for example, more than 1000 cubic meters, you can choose cryogenic. If it is smaller than this, the purity is more than 90%, ）It is recommended to select PSA pressure swing adsorption nitrogen generator. If the purity is low and the flow is large, VPSA vacuum analysis can be selected, but membrane separation is basically not used in the market.