Conditions Need To Be Controlled for Nitrogen Production From Carbon Molecular Sieve
1. Air Compression Purification Process
It is very necessary for pure feed air to enter the carbon molecular sieve adsorption tower, because the entry of particles and organic atmosphere into the adsorption tower will block the micropores of carbon molecular sieve and gradually reduce the separation performance of carbon molecular sieve.
The methods of purifying raw air are as follows: 1. Keep the air inlet of the air compressor away from places with dust, oil mist and organic atmosphere; 2. Through the cold dryer and adsorbent purification system, the treated raw air enters the carbon molecular sieve adsorption tower.
2. Concentration And Gas Production Of Product Nitrogen
For the preparation of nitrogen from carbon molecular sieve, the N2 concentration and gas production can be adjusted arbitrarily according to the needs of users. When the gas production time and operating pressure are determined, reduce the gas production, the N2 concentration will increase, on the contrary, the N2 concentration will decrease. Users can adjust according to actual needs.
3. Equalizing Time
When the pressure of the adsorbed gas in the two molecular sieves reaches the same direction, the service life of the adsorbed gas can be prolonged by injecting the adsorbed gas into the two molecular sieves in the same direction, so as to prolong the service life of the two molecular sieves. Referring to the switching speed of the valve, the voltage equalizing time is generally 1 ~ 3 seconds.
4. Gas Production Time
According to the different absorption and diffusion rates of carbon molecular sieve for oxygen and nitrogen, its adsorbed O2 will reach equilibrium in a short time. At this time, the adsorption capacity of N2 is very small, and the shorter gas production time can effectively improve the gas production rate of carbon molecular sieve, but it also increases the action frequency of the valve, so the performance of the valve is also very important. Generally, the adsorption time is 30 ~ 120 seconds. Short gas production time is recommended for small-scale high-purity nitrogen generator, and long gas production time is recommended for large-scale low concentration nitrogen generator.
5. Operating Pressure
Carbon molecular sieve not only has dynamic effect, but also has equilibrium adsorption effect. The partial pressure of adsorbate is high and the adsorption capacity is high. Therefore, pressurized adsorption is beneficial, but the adsorption pressure is too high, which also increases the requirements for the selection of air compressor. In addition, the adsorption pressure requirements of atmospheric regeneration and vacuum regeneration are also different. Considering various factors, it is suggested that the adsorption pressure of atmospheric regeneration process should be 5 ~ 8kg / cm2; The adsorption pressure of vacuum regeneration process should be 3 ~ 5kg / cm2.
6. Service Temperature
As an adsorbent, choosing a lower adsorption temperature is conducive to the performance of carbon molecular sieve. If conditions permit, it is beneficial to reduce the adsorption temperature.
7. Packaging And Use Of Products
1) This product is strictly tested according to the enterprise standard when leaving the factory to ensure that the quality index is qualified.
2) The products are sealed and packaged in plastic barrels with good sealing performance. They can be opened when filling and use to prevent moisture absorption.
3) The filling must be tight and can be vibrated by appropriate methods. Do not tamp it directly with the rod head.
Inquiry for Our Product
Vicky Xiao
E-mail: info@cnpackingmall.com
Pingxiang Super Packing Mall Co., Ltd.
Home page:https://www.pm-chem.com/
