Principle of pressure swing adsorption nitrogen production,a method in which air is used as a raw material, a carbon molecular sieve is used as an adsorbent, a pressure swing adsorption principle is utilized, and a selective adsorption of oxygen and nitrogen by a carbon molecular sieve is used to separate nitrogen and oxygen is generally referred to as PSA nitrogen production. Compared with the traditional nitrogen production method, it has simple process flow, high degree of automation, fast gas production, low energy consumption, product purity can be adjusted according to user needs in a wide range, convenient operation and maintenance, low operating cost, and equipment adaptation. It has strong characteristics, so it is competitive in nitrogen production equipment below 3000Nm3/h. It is more and more popular among small and medium-sized nitrogen users. PSA nitrogen production has become the preferred method for small and medium-sized nitrogen users.
Carbon molecular sieve can simultaneously adsorb oxygen and nitrogen in the air, and its adsorption amount also increases with the increase of pressure, and there is no significant difference in the equilibrium adsorption amount of oxygen and nitrogen under the same pressure. Thus, efficient separation of oxygen and nitrogen is difficult to accomplish by pressure alone. If the adsorption rate is further considered, the adsorption characteristics of oxygen and nitrogen can be effectively distinguished. The diameter of oxygen molecules is smaller than that of nitrogen molecules, so the diffusion rate is several hundred times faster than that of nitrogen. Therefore, the adsorption rate of oxygen by carbon molecular sieves is also very fast, and the adsorption reaches more than 90% in about 1 minute; at this time, the adsorption amount of nitrogen is only 5%. Left and right, so at this point the adsorption is mostly oxygen, and the rest is mostly nitrogen. Thus, if the adsorption time is controlled within 1 minute, the oxygen and nitrogen can be initially separated, that is, the adsorption and desorption are achieved by the pressure difference, the adsorption is carried out when the pressure is raised, and the desorption is caused when the pressure is lowered. The distinction between oxygen and nitrogen is achieved by controlling the adsorption time. The time control is very short, the oxygen is fully adsorbed, and the nitrogen is still adsorbed in the future, and the adsorption process is stopped. Therefore, there is a pressure change in pressure swing adsorption and nitrogen production, and the time should be controlled within 1 minute.
Jiayu PSA Nitrogen Generator adopts molecular sieve automatic compaction technology to produce high-purity nitrogen with purity up to 99.99% at one time. If it is equipped with high-purity nitrogen purification equipment produced by our company, it can produce nitrogen with purity up to 99.999%. . Jiayu CMS series nitrogen generator is the leading product of Jiangsu Jiayu Special Equipment Co., Ltd., with an annual output of 500 sets. Jiayu is one of the earliest enterprises engaged in the R&D and production of pressure swing adsorption high-purity nitrogen generators and the first batch of special equipment for the production of nitrogen generators in China. It is also an enterprise that can mass-produce and standardize production in China.