If the air pre-cooling system is working properly, the temperature of the air into the molecular sieve purifier will not change and the adsorption temperature curve is basically a straight horizontal line. The temperature of the air out of the adsorber is slightly higher than the inlet temperature due to the exothermic effect of adsorption, and is also approximately a straight line.
The difference between the air inlet and outlet temperature is related to the high or low air inlet temperature. The higher the temperature of the air inlet, the greater the saturated moisture content in it, the higher the removal load of the adsorber, the greater the heat of adsorption generated, and the temperature difference will increase accordingly. When the air inlet temperature is 10°C, the temperature rise is approximately 4°C.
If the outlet temperature of the purifier rises suddenly during use, it means that the air has brought the water from the air-cooled tower into the adsorber and should be dealt with urgently.
At the beginning of the switchover, there is a large temperature difference between the inlet and outlet, even up to 20°C. This is due to the fact that the adsorber is switched to the process of pressure charging, the adsorption capacity of the molecular sieve increases, and some molecules (including oxygen and nitrogen molecules) are adsorbed in the process of pressure charging, and the corresponding adsorption heat is then brought out by the air when it is switched to use. In addition, when the adsorber is first used, the adsorption capacity of the molecular sieve is large, so the temperature rises significantly, which is not due to the reason that the cold blowing is not complete.
Dear Air Separation small air separation units and large air separation plants are manufactured with complete technical requirements and specifications for each system, so that the air separtion unit operates stably and efficiently.
