Carbon dioxide gas separation/concentration device capable of feeding conditioned air
View Patent ↗A system separates and concentrates carbon dioxide not only from exhaust gas, but also from air conditioned air. A carbon dioxide gas sorption rotor is rotated in a foam module board laminated unit structure casing, which is divided and sealed into at least a processing gas zone, a recovery zone, and a desorption zone in the order of the rotor rotation direction. Carbon dioxide gas is sorbed in the processing gas zone while evaporating and cooling the honeycomb in a wet state. The carbon dioxide gas is sorbed by condensation heat by introducing saturated vapor into the sorption zone. The carbon dioxide gas is then purged through the recovery zone at the front of the rotation direction. This prevents thermal and oxidative degradation of the sorbent, and at the same time, carbon dioxide gas can be efficiently separated, concentrated, and recovered.
1 . A carbon dioxide gas separation and concentration system, comprising:
a rotor having a sorption ability for carbon dioxide;
a sealed casing accommodating the rotor and rotationally supporting the rotor, the sealed casing having at least a treatment gas zone, a recovery zone and a desorption zone in an order of rotor rotation, the recovery and desorption zones being formed from a stack of material layers, the material layers having an insulated construction to at least reduce condensate produced in the recovery and desorption zones,
the rotor being brought into contact with a mixed gas containing carbon dioxide gas in the treatment gas zone while the rotor is moistened with condensate, to sorb carbon dioxide gas while evaporating and cooling the condensate; and
a vaporizer to produce saturated vapor at approximately the normal boiling point of water at current atmospheric and operating conditions, the vapor being introduced into the desorption zone to desorb carbon dioxide sorbed in the treatment gas zone, by condensation heat of the vapor, the carbon dioxide being collected in the recovery zone.
2 . The carbon dioxide gas separation and concentration system according to claim 1 , wherein
the mixed gas containing carbon dioxide is supplied to an inlet of the treatment gas zone,
the mixed gas containing carbon dioxide is outside air or conditioned air from a building,
outlet air having carbon dioxide sorbed is produced at an outlet of the treatment gas zone, and
the outlet air having carbon dioxide sorbed is supplied to an air conditioning system to condition air in a building.
3 . The carbon dioxide gas separation and concentration system according to claim 1 , wherein
the rotor is incorporated into a rotor cassette module foam board together with a drive system for rotating the rotor, the drive system comprising a drive motor and a drive belt,
the rotor cassette module foam board is sandwiched between a front face module plate and a rear face module plate, the front face module plate and the rear face module plate holding a rotor shaft to support the rotor, the front face module plate and the rear face module plate sealing both sides of the rotor,
the front face module plate and the rear face module plate together form the recovery and desorption zones, the front face module plate being formed from a front stack of material layers, the rear face module plate being formed from a rear stack of material layers, the front and rear stacks of material layers each comprising at least one heat-resistant foam rubber plate, the material layers of the front stack of material layers and the rear stack of material layers have spaces therein to define at least one gas passageway in the front stack of material layers and at least one gas passageway in the rear stack of material layers, and
an airflow system module board incorporates a process gas blower that blows the mixed gas containing carbon dioxide, the airflow system module board being laminated to the front face module plate or the rear face module plate.
4 . The carbon dioxide gas separation and concentration system according to claim 1 , wherein
the stack of material layers is a fan-shaped block structure covering a fan-shaped portion of the rotor, the stack of material layers comprises:
at least two laminated foam rubber passage layers, each passage layer having a zone space selectively formed therein such that when the passage layers are laminated, the zone spaces together form a continuous passageway through the passage layers;
a heat-resistant and abrasion-resistant sliding sheet that defines a sliding surface in contact with an end face of the rotor, the heat-resistant and abrasion-resistant sliding sheet being provided on a first side of the passage layers; and
a heat-insulating plate without a zone space, the heat-insulating plate being provided on a second side of the passage layers, opposite the heat-resistant and abrasion-resistant sliding sheet, wherein
a vapor introduction section is in communication with at least one zone space, to introduce vapor into the stack of material layers, and
a desorption gas collection section is in communication with at least one zone space, to collect gas from the stack of material layers.
5 . A carbon dioxide gas separation and concentration system, comprising:
a rotor having a sorption ability for carbon dioxide;
a sealed casing accommodating the rotor and rotationally supporting the rotor, the casing having at least a treatment gas zone, a treatment gas purge zone, a recovery zone, a desorption zone, and a desorption gas purge zone, in an order of rotor rotation, the treatment gas purge zone, the recovery zone, the desorption zone, and the desorption gas purge zone being formed from a stack of material layers, the material layers having an insulated construction to at least reduce condensate produced therein, the stack of material layers defining a channel to circulate gas between the treatment gas purge zone and the desorption gas purge zone,
the rotor being brought into contact with a mixed gas containing carbon dioxide in the treatment gas zone, while the rotor is moistened with condensate, to sorb carbon dioxide while evaporating and cooling the condensate; and
a vaporizer to produce saturated vapor at approximately the normal boiling point of water at current atmospheric and operating conditions, the vapor being introduced into the desorption zone to desorb carbon dioxide sorbed in the treatment gas zone, using condensation heat of the vapor, the carbon dioxide being recovered in the recovery zone.
6 . The carbon dioxide gas separation and concentration system according to claim 5 , wherein
the mixed gas containing carbon dioxide is supplied to an inlet of the treatment gas zone,
the mixed gas containing carbon dioxide is outside air or conditioned air from a building,
air having carbon dioxide sorbed is produced at an outlet of the treatment gas zone, and
the air having carbon dioxide sorbed is sent to an air conditioner to condition air in a building.
7 . The carbon dioxide gas separation and concentration system according to claim 5 , wherein
the rotor is incorporated into a rotor cassette module foam board together with a drive system for rotating the rotor, the drive system comprising a drive motor and a drive belt,
the rotor cassette module foam board is sandwiched between a front face module plate and a rear face module plate, the front face module plate and the rear face module plate holding a rotor shaft to support the rotor, the front face module plate and the rear face module plate sealing both sides of the rotor,
the front face module plate and the rear face module plate together form the treatment gas purge zone, the recovery zone, the desorption zone, and the desorption gas purge zone, the front face module plate being formed from a front stack of material layers, the rear face module plate being formed from a rear stack of material layers, the front and rear stacks of material layers each comprising at least one heat-resistant foam rubber plate, the material layers of the front stack of material layers and the rear stack of material layers have spaces therein to define at least one gas passageway in the front stack of material layers and at least one passageway in the rear stack of material layers, and
an airflow system module board incorporates a process gas blower that blows the mixed gas containing carbon dioxide, the airflow system module board being laminated to the front face module plate or the rear face module plate.
8 . The carbon dioxide gas separation and concentration system according to claim 5 , wherein
the stack of material layers is a fan-shaped block structure covering a fan-shaped portion of the rotor, the stack of material layers comprises:
at least two laminated foam rubber passage layers, each passage layer having a zone space selectively formed therein such that when the passage layers are laminated, the zone spaces together form at least one continuous passageway through the passage layers;
a heat-resistant and abrasion-resistant sliding sheet that defines a sliding surface in contact with an end face of the rotor, the heat-resistant and abrasion-resistant sliding sheet being provided on a first side of the passage layers; and
a heat-insulating plate without a zone space, the heat insulating plate being provided on a second side of the passage layers, opposite the heat-resistant and abrasion-resistant sliding sheet, wherein
a vapor introduction section is in communication with at least one zone space, to introduce vapor into the stack of material layers, and
a desorption gas collection section is in communication with at least one zone space, to collect gas from the stack of material layers.
9 . The carbon dioxide gas separation and concentration system according to claim 8 , wherein the continuous passageway connects the treatment gas purge zone and the desorption gas purge zone.
10 . A carbon dioxide gas separation and concentration system, comprising:
a rotor having a sorption ability for carbon dioxide;
a sealed casing accommodating the rotor and rotationally supporting the rotor, the casing having at least a treatment gas zone, a treatment gas purge zone, a desorption zone, and a desorption gas purge zone, in an order of rotor rotation, the treatment gas purge zone, the desorption zone, and the desorption gas purge zone being formed from a laminated stack of layers, the laminated stack of layers defining a channel to circulate gas between the treatment gas purge zone and the desorption gas purge zone,
the rotor being brought into contact with a mixed gas containing carbon dioxide in the treatment gas zone, while the rotor is moistened with condensate, to sorb carbon dioxide while evaporating and cooling the condensate; and
a vapor source to produce saturated vapor for introduction into the desorption zone to desorb carbon dioxide sorbed in the treatment gas zone, wherein
the laminated stack of layers comprises a block structure covering at least a fan-shaped portion of the rotor, the stack of material layers comprises:
at least two laminated passage layers, each passage layer having a zone space selectively formed therein such that when the passage layers are laminated, the zone spaces together form the channel to circulate gas between the treatment gas purge zone and the desorption gas purge zone.
11 . The carbon dioxide gas separation and concentration system according to claim 10 , wherein the stack of material layers further comprises:
a heat-resistant and abrasion-resistant sliding sheet that defines a sliding surface in contact with an end face of the rotor, the heat-resistant and abrasion-resistant sliding sheet being provided on a first side of the passage layers; and
a heat-insulating plate without a zone space, the heat insulating plate being provided on a second side of the passage layers, opposite the heat-resistant and abrasion-resistant sliding sheet, wherein
a vapor introduction section is in communication with at least one zone space, to introduce vapor into the stack of material layers, and
a desorption gas collection section is in communication with at least one zone space, to collect gas from the stack of material layers.
12 . The carbon dioxide gas separation and concentration system according to claim 10 , wherein
the mixed gas containing carbon dioxide is supplied to an inlet of the treatment gas zone,
the mixed gas containing carbon dioxide is outside air or conditioned air from a building,
air having carbon dioxide sorbed is produced at an outlet of the treatment gas zone, and
the air having carbon dioxide sorbed is sent to an air conditioner to condition air in a building.
13 . The carbon dioxide gas separation and concentration system according to claim 10 , wherein
the rotor is incorporated into a rotor cassette module board together with a drive system for rotating the rotor,
the rotor cassette module board is sandwiched between a front face module plate and a rear face module plate,
the rear face module plate contains the laminated stack of layers comprising the block structure,
the front face module plate and the rear face module plate together form the treatment gas purge zone, the desorption zone, and the desorption gas purge zone,
the front face module plate comprises a channeling section provided opposite to the block structure provided on the rear face module plate, such that together, the channeling section and the block section sandwich at least the fan-shaped portion of the rotor, and
the channeling section of the front plate module plate completes the channel to circulate gas between the treatment gas purge zone and the desorption gas purge zone such that gas passes through one of the treatment gas purge zone and the desorption gas purge zone, then is channeled through the block section of the rear face module plate, then passes through the other of the treatment gas purge zone and the desorption gas purge zone, then is channeled through the channeling section of the front face module plate.
14 . The carbon dioxide gas separation and concentration system according to claim 13 , further comprising a purge pump to propel gas between the treatment gas purge zone and the desorption gas purge zone.