Gas separation device and packing
The gas separation device separates or captures a target gas component from a gas to be processed by: causing an absorbing liquid to flow down on a surface of a packing disposed inside a processing tank while supplying the gas to be processed containing the target gas component into the processing tank; bringing the absorbing liquid flowing down on the surface of the packing and the gas to be processed into gas-liquid contact; and thereby causing the absorbing liquid to absorb the target gas component contained in the gas to be processed. The packing includes at least one packing unit formed from multiple expanded metal plates, which are disposed vertically and arranged in parallel. Each expanded metal plate includes strands forming the openings which are arranged like stairs. Each strand is inclined to the vertical direction at an angle in a range from 48° to 73°.
1. A gas separation device configured to separate or capture a target gas component from a gas to be processed by: causing an absorbing liquid to flow down on a surface of a packing disposed inside a processing tank while supplying the gas to be processed containing the target gas component into the processing tank; bringing the absorbing liquid flowing down on the surface of the packing and the gas to be processed into gas-liquid contact; and thereby causing the absorbing liquid to absorb the target gas component contained in the gas to be processed, wherein
the packing comprises at least one packing unit including a plurality of raised expanded metal plates which are disposed vertically and arranged in parallel, and are each provided with openings,
each expanded metal plate includes strands forming the openings,
each strand is inclined to the vertical direction at an angle in a range from 48° to 73°,
a first thickness of each expanded metal plate is in a range from 0.5 mm to 0.7 mm,
a second thickness of each expanded metal plate is in a range from 0.2 mm to 0.3 mm,
the first thickness is a height of the expanded metal plate from a plane when the plate is laid on the plane, and
the second thickness is a thickness of a material plate forming the expanded metal plate.
2. The gas separation device according to claim 1 , further comprising:
the processing tank in which the packing is installed;
a gas introduction unit configured to introduce the gas to be processed into the processing tank; and
an absorbing liquid supply unit configured to supply the absorbing liquid to the packing, wherein
the plurality of expanded metal plates are arranged in parallel at regular intervals in the packing unit.
3. The gas separation device according to claim 1 , wherein the packing unit comprises:
a holding member configured to hold the plurality of expanded metal plates into a state of being arranged in parallel; and
spacers configured to provide regular intervals between the plurality of expanded metal plates.
4. The gas separation device according to claim 3 , wherein the holding member includes a penetrating member configured to penetrate through the plurality of expanded metal plates.
5. The gas separation device according to claim 4 , wherein the plurality of expanded metal plates include a through-hole to allow penetration of the penetrating member.
6. The gas separation device according to claim 5 , wherein the spacers comprise erected portions formed in such a way that parts of the strands constituting the plurality of expanded metal plates at a periphery of the through-hole are bent and erected in a plate thickness direction.
7. The gas separation device according to claim 4 , wherein the spacers comprise tubular members disposed between the plurality of expanded metal plates and configured to allow penetration of the penetrating member.
8. The gas separation device according to claim 3 , wherein the spacers comprise erected portions formed by bending parts of the strands constituting the plurality of expanded metal plates.
9. The gas separation device according to claim 1 , wherein the packing unit further comprises an annular member configured to encircle an outer periphery of the plurality of expanded metal plates and thereby integrally fix the plurality of expanded metal plates.
10. A method of capturing carbon dioxide from an exhaust gas with the gas separation device according to claim 1 , comprising:
flowing down an aqueous solution of an amine compound as the absorbing liquid on the surface of the packing; and
supplying the gas to be processed containing carbon dioxide as the target gas component into the processing tank.
11. The gas separation device according to claim 1 , wherein a shape of the openings is rhombic or hexagonal.
12. A packing for a gas processing device to cause an absorbing liquid to absorb a target gas component contained in a gas to be processed, the packing being used in such a way as to allow the absorbing liquid to flow down on a surface of the packing in order to bring the absorbing liquid and the gas to be processed into sufficient contact, comprising:
at least one packing unit including a plurality of raised expanded metal plates which are disposed vertically and arranged in parallel, and are each provided with openings, wherein
each expanded metal plate includes strands forming the openings,
each strand is inclined to the vertical direction at an angle in a range from 48° to 73°,
a first thickness of each expanded metal plate is in a range from 0.5 mm to 0.7 mm,
a second thickness of each expanded metal plate is in a range from 0.2 mm to 0.3 mm,
the first thickness is a height of the expanded metal plate from a plane when the plate is laid on the plane, and
the second thickness is a thickness of a material plate forming the expanded metal plate.
13. The packing according to claim 12 , wherein a shape of the openings is rhombic or hexagonal.