Gas adsorption concentration device, seal therefor and method of concentrating high boiling point VOCS using device
The device has a honeycomb rotor which is rotated and which supports an adsorbant. A seal divides the honeycomb rotor into a desorption zone and at least one other zone including an adsorption zone. The seal has a heat resistant/non flammable portion and an elastic seal portion. The heat resistant portion has a slot cut in a surface which contacts the honeycomb rotor. The elastic seal portion is formed outside of the desorption zone with respect to the heat resistant portion. Desorption air is substantially completely sealed within the desorption zone. The seal may allow for hot (perhaps 300° C.) desorption gas to be used with a rotation type gas adsorption concentration device.
1. A seal to divide a honeycomb rotor supporting an adsorbent into at least an adsorbing zone and a desorbing zone, the seal comprising:
a heat resistant portion positioned a predetermined distance from an upper surface of the honeycomb rotor to define a small gap therebetween; and
an elastic portion contacting the honeycomb rotor and formed exterior to the desorbing zone with respect to the heat resistant seal portion to prevent desorption gas having passed through the gap from leaking beyond the seal,
wherein the heat resistant portion and the elastic portion at least partially surround the desorbing zone.
2. A rotary gas adsorption device, comprising:
the honeycomb rotor that supports the adsorbent; and
the seal claimed in claim 1 .
3. The rotary gas adsorption device according to claim 2 , wherein the seal extends parallel to all borders of the desorption zone, to substantially surround the desorption zone.
4. The rotary gas adsorption device according to claim 2 , wherein the heat resistant material is formed of a mica-paper laminate.
5. The rotary gas adsorption device according to claim 2 , wherein the heat resistant material is formed of a mica-paper laminate in a polysilicone binder.
6. The rotary gas adsorption device according to claim 2 , wherein the elastic portion is formed of silicone rubber.
7. The rotary gas adsorption device according to claim 2 , wherein
the heat resistant portion has a surface closely adjacent to the honeycomb rotor, and
the surface of the heat resistant portion closely adjacent to the honeycomb rotor has angled cutout portions.
8. The rotary gas adsorption device according to claim 7 , wherein
the rotor rotates in a rotation direction, past the seal, and
the cutout portions face an upstream side relative to the rotation direction.
9. The rotary gas adsorption device according to claim 2 , wherein
the heat resistant portion has a surface closely adjacent to the honeycomb rotor, and
the surface of the heat resistant portion closely adjacent to the honeycomb rotor is spring biased toward the honeycomb rotor.
10. The rotary gas adsorption device according to claim 2 , wherein
the desorbing zone is pie-shaped, and
to separate the desorbing zone from a remainder of the honeycomb rotor, the seal comprises two side portions and a top curved portion.
11. A method of removing and concentrating high boiling point volatile organic compounds, comprising:
passing high boiling point volatile organic compounds through the adsorbing zone of the honeycomb rotor claimed in claim 2 ; and
passing a desorbing gas through the desorbing zone of the honeycomb rotor.
12. A method of removing and concentrating high boiling point volatile organic compounds according to claim 11 , wherein the high boiling point volatile organic compounds have a boiling point of at least 250 degrees C.
13. A method of removing and concentrating high boiling point volatile organic compounds according to claim 11 , wherein the desorbing gas is air heated to a temperature of at least 300 degrees C.