proces princip vakuum tlak nihanje adsorpcija (VPSA) kisik proizvodnja proces je v bistvu enako kot PSA. Glavna razlika je to po adsorpciji doseže ravnovesje (adsorpcija nasičenost), pot v ki dušik adsorbirana v zeolit molekularna sito je desorbirana drugačna.
Tlak nihanje adsorpcija kisik proizvodnja proces je v bistvu a PSA proces. VPSA proces, ki je trenutno največji razširjeno uporabljeno v industrijski proizvodnji, je a vrsta PSA proces. Za največja razširjena zeolit molekularna sito kisik proizvodnja proces, surova material uporabljena za proizvodnjo kisik uporaba tlak nihanje adsorpcija proces je zrak, ki se lahko poenostavlja kot a binarno mešano sistem sestavljeno iz kisik in dušik. adsorpcija sile dušika in kisika na zeolitu molekularnem situ so različni. sila dušik na zeolitu molekularnemu situ je večja kot to ti kisika, ki naredi dušik lažje adsorpirati na zeolit molekularno sito kot kisik.
Under isothermal conditions, when the pressurized air passes through the oxygen-producing zeolite molecular sieve packing layer in the adsorber (or tower), the equilibrium adsorption amount of nitrogen is much higher than that of oxygen. Under medium and low pressures, the oxygen-producing zeolite molecular sieve preferentially adsorbs nitrogen, thereby separating oxygen and nitrogen. When the pressure of the adsorber (or tower) decreases, the equilibrium adsorption amount of nitrogen decreases more than the equilibrium adsorption amount of oxygen. By utilizing this characteristic of the adsorption between nitrogen, oxygen and oxygen-producing zeolite molecular sieve, the adsorbed nitrogen is desorbed from the oxygen-producing zeolite molecular sieve by reducing the pressure or evacuating the vacuum, thereby restoring the adsorption performance of the oxygen-producing zeolite molecular sieve for nitrogen. In this way, the continuous production of oxygen can be achieved by using 2 or more adsorbers (or towers) for pressurized adsorption and decompressed desorption cyclic operation.
The VPSA process adds a vacuum pumping device compared to the PSA process. When the oxygen-producing zeolite molecular sieve adsorbs nitrogen to saturation, the pressure of the adsorber (or tower) is first reduced by venting, and then the vacuum pumping device is turned on to further reduce the pressure in the adsorber until it is below the standard atmospheric pressure. By maintaining a lower desorption pressure, the nitrogen adsorbed in the oxygen-producing zeolite molecular sieve is desorbed more fully, thereby enhancing the adsorption amount of nitrogen by the oxygen-producing zeolite molecular sieve after regeneration, thereby improving the purity of the product oxygen. By adding vacuum equipment, the VPSA process can produce oxygen with higher purity than the PSA device of the same scale, and the oxygen production capacity of the device is also greater, so the VPSA process has become a widely used pressure swing adsorption oxygen production process.
vakuum tlak nihanje adsorpcija (VPSA) kisik proizvodnja proces je razvit na osnovi PSA kisik proizvodnja proces.
Priljubljena oznake: VPSA kisik generator, Kitajska VPSA kisik generator proizvajalci, dobavitelji
