Hydrophilic and hydrophobic composite packing-based rotating packed bed and system
The present application provides a hydrophilic and hydrophobic composite packing-based rotating packed bed and a system. A hydrophobic packing and a hydrophilic packing are formed into a composite packing. When said packing cuts liquid, the hydrophobic packing can sufficiently disperse the liquid so as to make the dispersion of the liquid in the packing zone more uniform, and the wettability of the hydrophilic packing allows the liquid to spread sufficiently so as to increase the wetting efficiency of said packing. The phenomenon of droplet aggregation caused to liquid in a single hydrophobic packing zone and the phenomenon of reduction of liquid turbulence caused to liquid in a single hydrophilic packing zone can be avoided. Therefore, applying a hydrophilic and hydrophobic composite packing to a rotating packed bed can further improve the mass transfer and mixing performance thereof.
1. A hydrophilic and hydrophobic composite packing-based rotating packed bed, wherein the rotating packed bed comprises:
a rotating chamber, a packing is provided in the rotating chamber, the packing is used to cut a liquid into liquid microelements in micron-nano size, wherein
the packing comprises a first part and a second part provided around a center of the rotating chamber, the second part is located on an outer side of the first part, the surface of one of the first part and the second part is a hydrophilic surface, and the surface of the other is a hydrophobic surface
wherein the packing further comprises a third part, the third part is located between the first part and the second part, and a water contact angle of the surface of the third part is between the surfaces of the first part and the second part.
2. The rotating packed bed according to claim 1 , wherein the packing comprises a plurality of cutting layers formed through rolling of shaft, and the first part and the second part each comprise at least one cutting layer.
3. The rotating packed bed according to claim 2 , wherein two side surfaces of each cutting layer are respectively fit with one side surfaces of adjacent cutting layers.
4. The rotating packed bed according to claim 3 , wherein in the plurality of cutting layers, at least one side surface of at least one cutting layer is fit with one side surface of the adjacent cutting layer, and a gap with a set width is formed between at least one side surface of at least one cutting layer and one side surface of the adjacent cutting layer.
5. The rotating packed bed according to claim 2 , wherein water contact angles of the surfaces of the plurality of cutting layers sequentially increase or decrease along a direction towards the center of the rotating chamber.
6. The rotating packed bed according to claim 1 , wherein the roughness of the hydrophilic surface is 412.6 nm, the water contact angle is 44±0.6°, the roughness of the hydrophobic surface is 83.7 nm, and the water contact angle is 113±0.9°.
7. The rotating packed bed according to claim 1 , wherein the hydrophilic surface is formed by grinding through a sand blasting process and the hydrophobic surface is formed by spraying different types of particles.
8. The rotating packed bed according to claim 1 , wherein the packing further comprises a third part, the third part is located on an inner side of the first part or an outer side of the second part, and a water contact angle of the surface of the third part is between the surfaces of the first part and the second part.
9. A reaction system, wherein the reaction system comprises the rotating packed bed according to claim 1 .