The adsorption capacity of alumina and molecular sieve filled in the adsorber of the air separation equipment is limited, and after adsorption saturation, analytical regeneration operation is required. For continuous operation, two adsorbers were set up, one in an adsorption state and the other in a regeneration state.
Based on the characteristics of low-temperature and high-pressure adsorption and high-temperature and low-pressure desorption of the adsorbent, the adsorber with saturated adsorption is depressurized and blown away. Then, a steam heater or electric heater (special regeneration) is used to heat the low-pressure sewage nitrogen reheated from the low-pressure tower to a certain temperature for the bed layer to undergo heating, desorption, and regeneration. The temperature of the sewage nitrogen after heating is high enough to analyze the adsorbed water and carbon dioxide in the bed layer. After heating, use the reheated polluted nitrogen to cool the bed layer and remove the heat inside the bed layer. The cold blowing flow rate and time need to ensure that the residual heat in the bed layer is within a certain range when the cold blowing is completed, otherwise the outlet temperature of the regenerated adsorber will fluctuate after being put into use, which will affect the subsequent sections. After the regeneration is completed, the adsorber is pressurized and paralleled with the current running adsorber for a period of time before being put into adsorption.
The production technology of the DEAR air separation equipment is mature and standardized, with strict technical control. The equipment is safe and high-quality, ensuring safe operation and stable and efficient operation.
