1、 Membrane separation method uses the permeability selectivity of some organic polymeric membranes. When air passes through the membrane (0.1um) or hollow fiber membrane, the speed of oxygen passing through the membrane is about 4-6 times that of nitrogen, so as to realize the separation of oxygen and nitrogen.

這種方法裝置簡(jiǎn)單，操作方便，啟動(dòng)快，投資少。但它的氧濃度比較低，一般在28%-35%，所以它一般應用在氧氣純度不算高的地方。

This method has the advantages of simple device, convenient operation, fast start-up and less investment. However, its oxygen concentration is relatively low, generally 28% - 35%, so it is generally used where the oxygen purity is not high.

二、電解法采用的原理是在稀的硫酸、氫氧化鈉或硫酸鈉的水溶液中通直流電，使水電離。每制取1m3氧氣，同時(shí)獲得2m3氫氣。但由于制取1m3氧氣耗電量為12-15度耗電量太大，這種方法也不能大量生產(chǎn)。

2、 The principle of electrolysis method is to apply direct current in dilute sulfuric acid, sodium hydroxide or sodium sulfate aqueous solution to ionize water. Every 1m3 of oxygen is produced and 2m3 of hydrogen is obtained at the same time. However, because the power consumption for preparing 1m3 oxygen is 12-15 degrees, the power consumption is too large, and this method can not be produced in large quantities.

三、變壓吸附法分子篩式制氧機是一種氣體分離。物理方法(PSA法)直接從空氣中提取氧氣，即制即用，新鮮自然。在制氧機中裝填有分子篩，每克分子篩的表面積能達到800-1000m2/g，在加壓的情況下，利用分子篩的物理吸附和解吸，吸附空氣中的氮氣，未被吸附的氧氣則會(huì )被收集起來(lái)，通過(guò)對其進(jìn)行凈化處理，就能夠得到純度比較高的氧氣。分子篩制氧機是目前成熟的，具有標準和標準的制氧機，可實(shí)現周期性的循環(huán)制氧，是一個(gè)動(dòng)態(tài)的過(guò)程不存在高壓易爆等危險。

3、 Pressure swing adsorption molecular sieve oxygen generator is a kind of gas separation. Physical method (PSA method) directly extracts oxygen from the air, which is ready to use, fresh and natural. The oxygen generator is filled with molecular sieve, and the surface area of each gram of molecular sieve can reach 800-1000m2 / g. under pressure, nitrogen in the air is adsorbed by physical adsorption and desorption of molecular sieve, and the non adsorbed oxygen will be collected. Through purification treatment, oxygen with high purity can be obtained. Molecular sieve oxygen generator is mature at present. It has standard and standard oxygen generator, which can realize periodic circulating oxygen production. It is a dynamic process without high-pressure explosion and other risks.