Method for cleaning, adsorbing bed by sucked air in sucking procedure in pressure varied adsorption
A technology of inhaling air and pressure swing adsorption, which is applied in the field of pressure swing adsorption, can solve the problems of incomplete desorption regeneration, decreased purity of purified gas, and reduced recovery rate of purified gas, and achieve the goal of improving regeneration effect, improving purity and high recovery rate Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0016] The invention discloses a method for flushing an adsorption bed with inhaled air during the evacuation process of the pressure swing adsorption, and is used for removing ethylene from the mixed gas discharged from the air-conditioning fresh-keeping store.
[0017] As shown in the drawings, this embodiment adopts the usual adsorption bed A and adsorption bed B, and the pipelines 10, 20, 30, 40 and control valves 1A, 2A, 3A, 4A respectively connected to the adsorption bed A and adsorption bed B are configured. , 1B, 2B, 3B, 4B, wherein the control valves 4A, 4B are suction valves that respectively connect Tower A and Tower B with the atmosphere, and the vacuum pump D that communicates with control valves 3A and 3B constitutes a pressure swing adsorption system. The bed is packed with adsorbent activated carbon.
[0018] The pressure swing adsorption system operates under the control of a computer program, and the two adsorption beds alternately perform the adsorption proc...
Embodiment 2
[0021] A method of using inhaled air to flush the adsorption bed during the evacuation process of the pressure swing adsorption of the present invention. This embodiment adopts a pressure swing adsorption system similar to that of Example 1 with 4 adsorption beds. For 2000Nm 3 / h of nitrogen containing 15% carbon dioxide for purification. The adsorption pressure is 0.4MPa, and the pressure in the evacuation step is 0.03MPa. The adsorbent is activated carbon. The process steps of the four adsorption beds are continuously and alternately cycled: adsorption, pressure equalization, reverse pressure release, evacuation and suction air flushing (inhaled air volume 600Nm 3 / h), pressure equalization, boost. The carbon dioxide contained in the purified gas is <0.01%, and the nitrogen recovery rate is 98%.
Embodiment 3
[0023] A method of flushing the adsorption bed with inhaled air during the evacuation process of the pressure swing adsorption according to the present invention. This embodiment adopts a pressure swing adsorption system similar to that of Embodiment 1 with 4 adsorption beds. For 3000Nm 3 / h of nitrogen containing 10% carbon dioxide for purification. The adsorption pressure is 0.6MPa, and the vacuum step pressure is 0.02MPa. The adsorbent is 30% activated carbon + 60% fine-pore silica gel + 10% activated alumina. The process steps of the 4 adsorption beds cycled continuously and alternately are: adsorption, primary pressure equalization, secondary pressure equalization, reverse pressure release, evacuation and suction air flushing (inhalation air volume 350Nm 3 / h), secondary pressure equalization, primary pressure equalization, step-up. The treated purified gas contains carbon dioxide <0.005%, and the nitrogen recovery rate is 98.5%.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More