JP2022099372A - Carbon dioxide collection system and movable body - Google Patents

Abstract

To provide a carbon dioxide collection system capable of collecting even carbon dioxide generating from a movable body, and also to provide the movable body.SOLUTION: A carbon dioxide collection system comprises: an absorption tower site 31 for obtaining a carbon dioxide-rich absorption liquid 3 by making carbon dioxide absorb in a carbon dioxide-lean absorption liquid 4; a regeneration tower site 32 for recovering the above carbon dioxide-lean liquid by desorbing the carbon dioxide from the carbon dioxide-rich liquid; a first movable body 33 conveying the carbon dioxide-rich liquid stored in a first storage part from the absorption tower site to the regeneration tower site; a second movable body 34 conveying the carbon dioxide-lean liquid stored in a second storage part from the regeneration tower site to the absorption tower site; a first absorption part absorbing the carbon dioxide generating from the first movable body in the carbon dioxide-rich liquid stored in the first storage part; and a second absorption part absorbing the carbon dioxide generating from the second movable body in the carbon dioxide-lean liquid store in the second storage part.SELECTED DRAWING: Figure 1

Description

The present invention relates to a recovery system, a mobile body, for recovering carbon dioxide from a gaseous carbon dioxide source.

Equipment for blast furnaces, lime furnaces, heating furnaces, reactors, boilers, etc. in power plants, steel mills, cement factories, refineries, chemical factories, etc. due to the recent demand for reduction of carbon dioxide emissions due to global warming. There is a method of separating and recovering carbon dioxide in the gaseous carbon dioxide source discharged from the source or carbon dioxide in the atmosphere.

As a typical method for recovering carbon dioxide in a gaseous carbon dioxide supply source, the gaseous carbon dioxide supply source is brought into contact with an absorbent consisting of an aqueous solution of alkanol (amine compound) to be absorbed and reacted. An absorption step of obtaining a carbon dioxide-rich absorption liquid in which carbon dioxide reacts with an absorbent, and a carbon dioxide-rich absorption liquid obtained by performing the absorption step to obtain carbon dioxide and regenerate the absorbent. There is a regeneration process and a method of performing.

Reference 1 shows a method of utilizing waste heat in such a carbon dioxide recovery process. In this method, the gaseous carbon dioxide supply source is supplied to the cooling tower to cool it, and the cooled gaseous carbon dioxide supply source is supplied to the absorption tower and brought into contact with the regenerated absorption liquid supplied from the regenerating tower. The step of absorbing the carbon dioxide in the gaseous carbon dioxide supply source into the regenerated absorption liquid and the carbon dioxide absorption solution stored in the bottom of the absorption tower are heated by exchanging heat with the regenerated absorption liquid supplied from the regeneration tower. After that, it is supplied to the regeneration tower, and the bottom of the regeneration tower is heated using saturated steam to separate the carbon dioxide absorption solution into carbon dioxide and the regeneration absorption liquid, and the carbon dioxide is discharged and recovered from the regeneration tower. including. In this method, the hot water return water is heat-exchanged with the regenerated absorption liquid after heat exchange, heat exchange with carbon dioxide exhausted from the regenerating tower, and heat exchange with saturated water after heating the bottom of the regenerating tower. Disclosed is a method of utilizing exhaust heat of a carbon dioxide recovery process, which is a continuous absorption method characterized in that hot water is obtained by heating by any one of the above or a combination of two or more.

Further, Cited Document 2 discloses a CO ₂ absorption tower and a CO ₂ emission tower. The CO ₂ absorption tower has a gaseous carbon dioxide supply source introduction port that introduces a gaseous carbon dioxide supply source into the CO ₂ absorption tower and a gaseous carbon dioxide supply source that discharges the gaseous carbon dioxide supply source from the CO ₂ absorption tower. A stationary type having a discharge port, an absorption liquid introduction port for introducing an amine compound-containing absorption liquid into a CO ₂ absorption tower, an absorption liquid discharge port for discharging an amine compound-containing absorption liquid from a CO ₂ absorption tower, and a spiral porous wing. It comprises a filler which is a mixer.

The CO ₂ emission tower has an absorption liquid introduction port for introducing an amine compound-containing absorption liquid into the CO ₂ emission tower, an absorption liquid discharge port for discharging the amine compound-containing absorption liquid from the CO ₂ emission tower, and a CO ₂ emission tower for steam. It is provided with a steam introduction port to be introduced into, a CO ₂ discharge port for discharging CO ₂ from a CO ₂ emission tower, and a filler which is a static mixer having a spiral porous blade. In the method of Cited Document 2, the carbon dioxide absorption method and the amine compound-containing absorbent liquid regeneration method are performed at the same time.

In the carbon dioxide absorption method, a gaseous carbon dioxide supply source containing CO ₂ and an amine compound-containing absorption liquid are brought into contact with each other in a countercurrent or parallel flow with a filler in the CO ₂ absorption tower, and the gaseous carbon dioxide is absorbed. In the first step of reacting and absorbing CO ₂ contained in the supply source with the amine compound-containing absorbing liquid, the gaseous carbon dioxide supply source is transferred from the gaseous carbon dioxide supply source introduction port to the gaseous carbon dioxide supply source discharge port. The first step in which the absorption liquid containing an amine compound flows from the absorption liquid introduction port to the absorption liquid discharge port, and the downstream side of the packing in the flow direction of the amine compound-containing absorption liquid from the absorption liquid introduction port to the absorption liquid discharge port. A part of the amine compound-containing absorption liquid is recovered from the CO ₂ absorption tower at the position, the recovered amine compound-containing absorption liquid is cooled, and the cooled amine compound-containing absorption liquid is filled in the flow direction of the amine compound-containing absorption liquid. Filling in the second step of supplying to the CO ₂ absorption tower at the position on the upstream side of the object and in the flow direction of the gaseous carbon dioxide supply source from the gaseous carbon dioxide supply source introduction port to the gaseous carbon dioxide supply source discharge port. A third that supplies a liquid to the CO ₂ absorption tower at a position on the downstream side of the object and brings it into contact with the gaseous carbon dioxide supply source, recovers the liquid in contact with the gaseous carbon dioxide supply source, and cools the recovered liquid. Includes steps and at least one step selected from the group consisting of.

The method for regenerating an absorption liquid containing an amine compound is to dissipate CO ₂ from the absorption liquid containing an amine compound by bringing the absorption liquid containing an amine compound containing CO ₂ and steam into contact with each other in a countercurrent manner in a CO ₂ emission tower. In the first step of regenerating the amine compound-containing absorbent solution and recovering CO ₂ , the amine compound _- containing absorbent solution flows from the absorbent solution introduction port to the absorbent solution discharge port, and the steam is discharged from the steam inlet. A part of the amine compound-containing absorption liquid from the CO ₂ emission tower at the position downstream of the packing in the first step of flowing to the outlet and the flow direction of the amine compound-containing absorption liquid from the absorption liquid introduction port to the absorption liquid discharge port. The recovered amine compound-containing absorption liquid is heated, and the heated amine compound-containing absorption liquid is supplied to the CO ₂ emission tower at a position downstream of the packing in the flow direction of the amine compound-containing absorption liquid. In the second step, a part of the amine compound-containing absorption liquid is recovered from the CO ₂ emission tower at a position on the downstream side of the packing in the flow direction of the amine compound-containing absorption liquid, and the recovered amine compound-containing absorption liquid is heated. Amine compound-containing absorption comprising a third step of generating steam and supplying the steam to a CO ₂ emission tower from the steam inlet, and at least one step selected from the group consisting of A carbon dioxide recovery process, which is a continuous absorption method in which a liquid regeneration method and a liquid regeneration method are performed at the same time, is disclosed.

Japanese Patent Application Laid-Open No. 2003-225537 International Publication No. 2018/190104

In Patent Document 1 and Patent Document 2, carbon dioxide in the gaseous carbon dioxide supply source is recovered by simultaneously performing the carbon dioxide absorption step and the carbon dioxide desorption step. However, depending on the operation of the factory, for example, in the case of equipment that operates only during the day and stops at night, the gaseous carbon dioxide supply source is not emitted at night, so the carbon dioxide recovery device must be stopped, and the operating rate must be stopped. Will be low driving.

On the other hand, if the absorption tower and the regeneration tower are installed at physically separated positions, such as when the absorption tower and the regeneration tower are installed in different areas or countries, it is necessary to transport carbon dioxide between the absorption tower and the regeneration tower. There is. However, there is a problem that the moving body becomes a source of carbon dioxide as a result of using fossil fuel with the transportation of carbon dioxide using the moving body.
Therefore, an object of the present invention is to provide a carbon dioxide recovery system and a mobile body capable of recovering carbon dioxide generated from the mobile body.

The above problem is solved by the following invention.

That is, the carbon dioxide recovery system of the present invention (1) has an absorption tower site that obtains a carbon dioxide-rich absorption liquid by absorbing carbon dioxide supplied from a gaseous carbon dioxide supply source into a carbon dioxide lean absorption liquid.
A regeneration tower site that desorbs carbon dioxide from the carbon dioxide-rich absorbent and recovers the carbon dioxide lean absorber and carbon dioxide.
A first moving body having a first storage unit and transporting the carbon dioxide-rich absorbent liquid stored in the first storage unit from the absorption tower site to the regeneration tower site.
A second moving body having a second storage portion and transporting the carbon dioxide lean absorbing liquid stored in the second storage portion from the regeneration tower site to the absorption tower site.
A first absorbing unit provided in the first moving body and absorbing carbon dioxide generated from the first moving body into the carbon dioxide-rich absorbing liquid stored in the first storage unit.
A second absorbing unit provided in the second moving body and absorbing carbon dioxide generated from the second moving body into the carbon dioxide lean absorbing liquid stored in the second storage unit, and a second absorbing unit.
To prepare for.

Further, the carbon dioxide recovery system of the present invention (2) is the carbon dioxide recovery system according to (1), and the carbon dioxide lean absorption liquid and the carbon dioxide rich absorption liquid contain an absorbent. It is a liquid
The absorbent is an amine compound.

Further, the moving body of the present invention (3) includes an internal combustion engine and
A storage unit that stores carbon dioxide-rich absorbent or carbon dioxide lean absorbent, and
An exhaust system that extends from the internal combustion engine and allows exhaust gas containing carbon dioxide to pass through.
An absorption unit provided in the middle of the exhaust system, which absorbs the carbon dioxide in the exhaust gas into the carbon dioxide-rich absorption liquid or the carbon dioxide lean absorption liquid supplied from the storage unit. ,
To prepare for.

Further, the moving body of the present invention (4) is the moving body according to (3).
The absorption unit is a pump unit that sends the carbon dioxide rich absorption liquid or the carbon dioxide lean absorption liquid to the absorption unit, and includes a pump unit to which driving force is supplied from the internal combustion engine.

Further, the present invention (5) is the moving body according to (3) or (4).
The carbon dioxide lean absorption liquid and the carbon dioxide rich absorption liquid are absorption liquids containing an absorbent.
The absorbent is an amine compound.

According to the present invention, it is possible to provide a carbon dioxide recovery system and a mobile body capable of recovering carbon dioxide generated from a mobile body.

It is a system diagram which shows the carbon dioxide recovery system of embodiment. It is a schematic diagram schematically showing the moving body of the first embodiment of the carbon dioxide recovery system shown in FIG. 1. It is a schematic diagram which shows typically the moving body of 2nd Embodiment.

The carbon dioxide recovery system of the present invention will be described with reference to FIG.

As shown in FIG. 1, the carbon dioxide recovery system 10 is a first moving body that transports the absorption tower site 31, the regeneration tower site 32, and the carbon dioxide rich absorber 3 from the absorption tower site 31 to the regeneration tower site 32. 33 and a second moving body 34 for transporting the carbon dioxide lean absorption liquid 4 from the regeneration tower site 32 to the absorption tower site 31. At the absorption tower site 31, an absorption step of absorbing carbon dioxide in the gaseous carbon dioxide supply source 1 is performed. At the regeneration tower site 32, a regeneration step of desorbing and recovering carbon dioxide from the carbon dioxide-rich absorbing liquid is performed.

The absorption tower site 31 has an absorption tower 11 having a contact mechanism 19a inside, a carbon dioxide rich absorption liquid storage tank 13a for the absorption tower, a carbon dioxide lean absorption liquid storage tank 14a for the absorption tower, and a lower portion of the absorption tower 11. A connected gaseous carbon dioxide supply source supply pipe 27, a tower top gas discharge pipe 28 connected to the top of the absorption tower 11 and discharging treated exhaust gas 2 from the absorption tower 11, and a carbon dioxide lean absorber storage tank for the absorption tower at one end. Carbon dioxide lean absorption liquid supply pipe 21 connected to 14a and the other end connected to the upper part of the absorption tower 11 and carbon dioxide connected to the bottom of the absorption tower 11 and the other end connected to the carbon dioxide rich absorption liquid storage tank 13a for the absorption tower. It has a rich absorbent liquid discharge pipe 22 and.

In the absorption tower 11, a carbon dioxide absorption step is performed. The carbon dioxide-rich absorption liquid storage tank 13a for the absorption tower can store the carbon dioxide-rich absorption liquid 3 obtained by performing the absorption step. The carbon dioxide lean absorption liquid storage tank 14a for the absorption tower can store the carbon dioxide lean absorption liquid 4 supplied to the absorption tower 11 prior to the absorption step. The gaseous carbon dioxide supply source supply pipe 27 supplies the gaseous carbon dioxide supply source 1 to the absorption tower 11.

The gaseous carbon dioxide supply source 1 is a gas containing carbon dioxide. Examples of the supply source of the gaseous carbon dioxide supply source 1 include equipment such as a blast furnace, a lime furnace, a heating furnace, a reaction furnace, and a boiler in a power plant, a steel mill, a cement factory, a refinery, a chemical factory, and the like. Further, the source of the gaseous carbon dioxide supply source 1 is the atmosphere.

The regeneration tower site 32 has a regeneration tower 12 in which a contact mechanism 19b is installed, a carbon dioxide lean absorption liquid storage tank 14b for the regeneration tower, and a carbon dioxide rich absorption liquid storage tank 13b for the regeneration tower. A carbon dioxide-rich absorbent liquid supply pipe 23 that is connected to the carbon dioxide-rich absorbent storage tank 13b for the tower and the other end is connected to the upper part of the regeneration tower 12, and one end is connected to the bottom of the regeneration tower 12 and the other end is the carbon dioxide lean for the regeneration tower. The carbon dioxide lean absorption liquid discharge pipe 24 connected to the absorption liquid storage tank 14b, the heat exchanger 15 provided at the intersection of the carbon dioxide rich absorption liquid supply pipe 23 and the carbon dioxide lean absorption liquid discharge pipe 24, and the carbon dioxide lean. The cooler 20 attached to the absorption liquid discharge pipe 24, the tower bottom heating branch pipe 25 branching from the vicinity of the tower bottom of the carbon dioxide lean absorption liquid discharge pipe 24 and connecting to the bottom of the tower, and the tower bottom heating branch pipe 25. An attached reboiler 16, a carbon dioxide discharge pipe 29 connected to the top of the regeneration tower 12 to discharge carbon dioxide 5 from the regeneration tower 12, and a carbon dioxide cooler 17 provided in the middle of the carbon dioxide discharge pipe 29. , A gas-liquid separator 18 provided on the downstream side of the carbon dioxide cooler 17 of the carbon dioxide discharge pipe 29, and a coolant return pipe having one end connected to the liquid recovery portion of the gas-liquid separator 18 and the other end connected to the upper part of the tower. 26 and.

In the regeneration tower 12, a regeneration step is performed in which carbon dioxide is released from the carbon dioxide rich absorption liquid to regenerate the carbon dioxide lean absorption liquid. The carbon dioxide lean absorbing liquid storage tank 14b for the regeneration tower can store the carbon dioxide lean absorbing liquid 4 obtained by performing the regeneration step. The carbon dioxide-rich absorption liquid storage tank 13b for the regeneration tower can store the carbon dioxide-rich absorption liquid 3 supplied to the regeneration tower 12 prior to the regeneration step. The heat exchanger 15 exchanges heat between the liquid in the carbon dioxide rich absorbing liquid supply pipe 23 and the liquid in the carbon dioxide lean absorbing liquid discharging pipe 24.

Although not shown, the carbon dioxide lean absorption liquid supply pipe 21, the carbon dioxide rich absorption liquid discharge pipe 22, the carbon dioxide rich absorption liquid feed supply pipe 23, the carbon dioxide lean absorption liquid discharge pipe 24, and the branch pipe for heating the bottom of the tower are not shown. 25. The coolant return pipe 26 is provided with a liquid feed pump for feeding the liquid.

The first moving body 33 transfers the carbon dioxide-rich absorption liquid 3 in the carbon dioxide-rich absorption liquid storage tank 13a for the absorption tower of the absorption tower site 31 into the carbon dioxide-rich absorption liquid storage tank 13b for the regeneration tower of the regeneration tower site 32. transport. The second moving body 34 transfers the carbon dioxide lean absorbing liquid 4 in the carbon dioxide lean absorbing liquid storage tank 14b for the regenerating tower of the regenerating tower site 32 into the carbon dioxide lean absorbing liquid storage tank 14a for the absorbing tower of the absorbing tower site 31. transport. Details of the first moving body 33 and the second moving body 34 will be described later.

A method of recovering carbon dioxide by the carbon dioxide recovery system 10 will be described with reference to FIG. 1.

The absorption process performed at the absorption tower site 31 will be described. The gaseous carbon dioxide supply source 1 is supplied to the lower part of the absorption tower 11 by the gaseous carbon dioxide supply source supply pipe 27 connected to the supply source. The carbon dioxide lean absorbing liquid 4 in the carbon dioxide lean absorbing liquid storage tank 14a for the absorption tower is supplied to the upper part of the absorbing tower 11 via the carbon dioxide lean absorbing liquid supply pipe 21. In the absorption tower 11, the gaseous carbon dioxide supply source 1 is flowed in an upward flow, and the carbon dioxide lean absorption liquid 4 is flowed in a downward flow. As a result, the gaseous carbon dioxide supply source 1 and the carbon dioxide lean absorbing liquid 4 are brought into contact with each other in a countercurrent manner in the absorption tower 11. At this time, the carbon dioxide in the gaseous carbon dioxide supply source 1 reacts with the absorbent in the carbon dioxide lean absorbing liquid 4, and the carbon dioxide is reacted and absorbed by the carbon dioxide lean absorbing liquid 4. As a result, the carbon dioxide-rich absorption liquid 3 is generated and accumulates at the bottom of the absorption tower 11. The carbon dioxide-rich absorption liquid 3 accumulated at the bottom of the absorption tower 11 is sent to the carbon dioxide-rich absorption liquid storage tank 13a for the absorption tower via the carbon dioxide-rich absorption liquid discharge pipe 22, and the carbon dioxide-rich absorption for the absorption tower is absorbed. It is held in the liquid storage tank 13a.

The regeneration process performed at the regeneration tower site 32 will be described. In the regeneration tower 12, a part of the carbon dioxide lean absorbing liquid 4 accumulated in the bottom of the regeneration tower 12 is extracted. The carbon dioxide lean absorbing liquid 4 is heated by the reboiler 16 heated by the high-temperature steam (steam) 45, and the heated carbon dioxide lean absorbing liquid 4 is returned to the lower part of the regeneration tower 12. As a result, the carbon dioxide lean absorption liquid 4 accumulated in the bottom of the tower is heated, and the absorption liquid at the bottom of the tower is used as the absorption liquid at the saturation temperature. As a result, an upward flow of vapor of the absorbing liquid having a saturation temperature is generated in the regeneration tower 12, and the inside of the regeneration tower 11 is heated. In this way, a part of the carbon dioxide lean absorbing liquid 4 accumulated at the bottom of the regeneration tower 12 is extracted, the carbon dioxide lean absorbing liquid 4 is heated by the reboiler 16, and the heated carbon dioxide lean absorbing liquid 4 is used in the regeneration tower. Repeatedly returning to the bottom of 12. This creates an upward flow of vapor of the absorbing liquid at the saturation temperature in the regeneration tower 12.

On the other hand, the carbon dioxide-rich absorption liquid 3 in the carbon dioxide-rich absorption liquid storage tank 13a for the regeneration tower is supplied to the upper part of the regeneration tower 12 via the carbon dioxide-rich absorption liquid supply pipe 23 to supply the carbon dioxide-rich absorption liquid 3. Form a downward flow. The carbon dioxide-rich absorbing liquid 3 is heated by the encounter between the upward flow and the downward flow in the regeneration tower 12. At this time, carbon dioxide is desorbed from the carbon dioxide rich absorbing liquid 3 and the carbon dioxide lean absorbing liquid 4 is generated. The generated carbon dioxide lean absorbing liquid 4 collects at the bottom of the regeneration tower 11. A part of the carbon dioxide lean absorbing liquid 4 accumulated in the bottom of the regeneration tower 11 is sent to and held in the carbon dioxide lean absorbing liquid storage tank 14b for the regeneration tower via the carbon dioxide lean absorbing liquid discharge pipe 24.

The desorbed carbon dioxide 5 is recovered via the carbon dioxide discharge pipe 29. The carbon dioxide 5 discharged from the regeneration tower 12 contains water vapor and a trace amount of an absorbent. Therefore, the carbon dioxide cooler 17 cools the carbon dioxide 5 discharged from the regeneration tower 12, and the gas-liquid separator 18 separates water (water vapor) and the absorbent from the carbon dioxide 5, and only the carbon dioxide 5 is used. To collect. The water and the absorbent separated by the gas-liquid separator 18 are returned to the upper part of the tower via the coolant return pipe 26.

When the absorption step is performed at the absorption tower site 31, the carbon dioxide lean absorption liquid 4 in the carbon dioxide lean absorption liquid storage tank 14a for the absorption tower decreases. Therefore, the second moving body 34 transfers the carbon dioxide lean absorption liquid 4 of the regeneration tower site 32 (carbon dioxide lean absorption liquid storage tank 14b for the regeneration tower) to the carbon dioxide lean absorption liquid storage tank 14a for the absorption tower. .. When the regeneration step is performed at the regeneration tower site 32, the carbon dioxide-rich absorption liquid 3 in the carbon dioxide-rich absorption liquid storage tank 13b for the regeneration tower decreases. Therefore, the carbon dioxide-rich absorption liquid 3 of the absorption tower site 31 (carbon dioxide-rich absorption liquid storage tank 13a for the absorption tower) is transferred to the carbon dioxide-rich absorption liquid storage tank 13b for the regeneration tower by the first moving body 33. ..

In the present invention, the absorption step at the absorption tower site 31 and the regeneration step at the regeneration tower site 32 can be performed independently. That is, the absorption step and the regeneration step may be performed in parallel, or there may be a time zone in which only the absorption step is performed or a time zone in which only the regeneration step is performed.

In this way, the carbon dioxide recovery system 10 performs the absorption step, the regeneration step, the carbon dioxide lean absorption liquid transfer step, and the carbon dioxide rich absorption liquid transfer step, whereby the subject of the present invention is subjected to. Carbon dioxide in the processing gas is recovered.

In the method for recovering carbon dioxide in the gaseous carbon dioxide supply source of the present invention, the carbon dioxide lean absorber and the carbon dioxide rich absorber are both absorbents containing an absorbent. The carbon dioxide lean absorption liquid is an absorption liquid in which carbon dioxide is desorbed in the regeneration step and the amount of carbon dioxide absorbed is small. On the other hand, the carbon dioxide-rich absorption liquid is an absorption liquid that has absorbed carbon dioxide in the absorption step and has a large amount of carbon dioxide absorbed.

Examples of the absorbent contained in the absorbent include all amine-based compounds, for example, monoethanolamine, diethanolamine, diisopropanolamine, dimethyldiethanolamine, alkanolamine such as triethanolamine, amino alcohol such as aminodiethylene glycol, and hindered amine-based compounds. , Piperazine-based compounds, piperidin-based compounds, polyalkylpolyamine-based compounds, amino acid-based compounds, amino acid salt-based compounds, derivatives thereof, organic amine-based compounds and the like. The absorbent may be one kind or a combination of the above two or more kinds at an arbitrary mixing ratio. As the absorbent, those having a high absorption rate, a large amount of carbon dioxide absorption, thermal stability, and a small energy during regeneration are preferable.

Examples of the absorbent liquid include an aqueous solution of an absorbent. As the absorbing solution, an aqueous solution of alkanolamine is preferable, and an aqueous solution of alkanolamine having a concentration of 15 to 45% by mass is particularly preferable.
[First Embodiment of a moving body]

Subsequently, the moving body 51 according to the first embodiment will be described with reference to FIGS. 1 and 2. The first moving body 33 and the second moving body 34 are composed of, for example, a transport vehicle having the same form, for example, a tank truck. Therefore, the moving body 51 described in the present embodiment can be utilized as the first moving body 33 when transporting the carbon dioxide-rich absorbent liquid 3 from the absorption tower site 31 to the regeneration tower site 32 at one time, and at other times, carbon dioxide. The lean absorption liquid 4 can be utilized as the second moving body 34 when transporting the lean absorption liquid 4 from the regeneration tower site 32 to the absorption tower site 31.

The moving body 51 is mounted on the vehicle body 52, the internal combustion engine 53 mounted on the vehicle body 52, the exhaust system 65 extending from the internal combustion engine 53 and passing exhaust gas containing carbon dioxide, and the loading platform 54 of the vehicle body 52. Carbon dioxide in the exhaust gas in the storage unit 55 that stores the absorption liquid inside and the absorption liquid (carbon dioxide rich absorption liquid 3 or carbon dioxide lean absorption liquid 4) in the storage unit 55 provided in the middle of the exhaust system 65. It is provided with an absorption unit 56 for absorbing carbon dioxide. The storage section 55 is composed of a general tank for a tank truck, and has a plurality of private chambers 55A and 55B inside. When the moving body 51 is used as the first moving body 33, the storage unit 55 (private room 55A) is used, for example, as a first storage unit for storing the carbon dioxide-rich absorbing liquid 3. When the moving body 51 is used as the second moving body 34, the storage unit 55 (private room 55B) is used as, for example, a second storage unit for storing the carbon dioxide lean absorbing liquid 4.

The internal combustion engine 53 is composed of, for example, a diesel engine or the like, but may be composed of another engine such as a gasoline engine.

The absorption portion 56 is formed in a so-called ejector type jet scrubber shape. When the moving body 51 is utilized as the first moving body 33, the absorbing unit 56 absorbs the carbon dioxide generated from the first moving body 33 into the carbon dioxide rich absorbing liquid 3 stored in the first storage unit. It is used as the first absorption unit. When the moving body 51 is utilized as the second moving body 34, the absorbing unit 56 absorbs the carbon dioxide generated from the second moving body 34 into the carbon dioxide lean absorbing liquid 4 stored in the second storage unit. It is used as a second absorption unit.

The absorption unit 56 is connected to the bottom of each of the private chambers 55A and 55B of the storage unit 55, and is connected to the first pipe unit 61 which joins as one pipe on the downstream side, and a plurality of branch pipes of the first pipe unit 61. Interlocking valves 100B to 105B provided in the middle of each, a pump section 62 connected to the downstream end of the first pipe section 61, and a second pipe section 63 extending from the pump section 62 to the upper side of the storage section 55. A jet nozzle 64 provided at an end opposite to the end connected to the pump portion 62 of the second pipe portion 63, an exhaust duct 66 covering the jet nozzle 64 and the outlet of the exhaust system 65, and a jet nozzle 64. A tubular scrubber portion 67 located on the downstream side of the pipe and integrally provided with the exhaust duct 66, a separator chamber 68 provided on the downstream side of the scrubber portion 67, and a separator chamber 68 having a substantially "L" -shaped cross section. It is provided in the middle of each of the disturbing plate 71, the third pipe portion 72 branched from the separator chamber 68 to the private chambers 55A and 55B of the storage portion 55, and the plurality of branch pipes of the third pipe portion 72. Interlocking valves 100A to 105A, an exhaust chamber 74 provided next to the separator chamber 68 and connected by a conduit 73, a filter 75 (mesh screen or the like) provided in the exhaust chamber 74, and downstream of the filter 75. It has an exhaust pipe 76 and the like. The interlocking valves 100A to 105A and the interlocking valves 100B to 105B are composed of, for example, solenoid valves, but may be valves that are manually switched between opening and closing.

Although the pump unit 62 is composed of a centrifugal pump, it may be composed of an axial flow pump or another pump. As shown in FIG. 2, the driving force of the pump unit 62 may be obtained from the internal combustion engine 53 via the drive shaft 77, the clutch 78, or the like, or the motor is supplied with power from the battery mounted on the vehicle body 52. May be rotationally driven by.

Subsequently, the operation of the moving body 51 of the present embodiment will be described. When the moving body 51 is used as the first moving body 33 for transporting the carbon dioxide-rich absorbing liquid 3 from the absorbing tower site 31 to the regenerating tower site 32, the storage portion 55 of the moving body 51 is rich in carbon dioxide. The absorption liquid 3 is stored. When the moving body 51 is used as the second moving body 34 for transporting the carbon dioxide lean absorbing liquid 4 from the regeneration tower site 32 to the absorbing tower site 31, the carbon dioxide lean is contained in the storage portion 55 of the moving body 51. The absorption liquid 4 is stored. Hereinafter, the operation when the moving body 51 is used as the first moving body 33 will be mainly described.

When the moving body 51 travels, the internal combustion engine 53 is driven to generate propulsive force, and exhaust gas containing carbon dioxide is generated due to the combustion explosion of fuel (light oil or the like). The exhaust gas flows inside the exhaust system 65 and is guided into the exhaust duct 66 in the vicinity of the jet nozzle 64, as shown by the broken line arrow. On the other hand, the pump unit 62, which receives rotational power from the internal combustion engine 53, is rotationally driven from the private chambers 55A and 55B of the storage unit 55 via the first pipe portion 61 and the second pipe portion 63, and the carbon dioxide-rich absorber 3 is used. Is pumped up to the upper part of the reservoir 55 as shown by an arrow. The jet nozzle 64 ejects the carbon dioxide-rich absorbent liquid 3, which has been made high pressure by the action of the pump unit 62, as a jet toward the downstream direction. When the exhaust gas is taken into this jet stream, the carbon dioxide in the exhaust gas is taken into the carbon dioxide rich absorbing liquid 3. The carbon dioxide-rich absorbing liquid 3 takes in a larger amount of carbon dioxide than the carbon dioxide lean absorbing liquid 4, but does not take in carbon dioxide to the limit that can be absorbed. Therefore, carbon dioxide can be taken into the carbon dioxide rich absorber 3 up to a limit amount corresponding to the concentration of carbon dioxide in the exhaust gas generated from the internal combustion engine 53.

The jet of the carbon dioxide-rich absorbent 3 collides with the obstruction plate 71 of the separator chamber 68. As a result, the carbon dioxide rich absorber 3 and the exhaust gas are separated. The carbon dioxide-rich absorbent liquid 3 that has collided with the baffle plate 71 collects in the lower part of the separator chamber 68. The carbon dioxide-rich absorbent liquid 3 stored in the lower part of the separator chamber 68 is returned to the private chambers 55A and 55B of the storage portion 55 via the third pipe portion 72 by the action of gravity. The interlocking valves 100A to 105A and the interlocking valves 100B to 105B are shown in the illustration in which power is supplied from an in-vehicle battery so that the carbon dioxide-rich absorbent liquid 3 emitted from the private chambers 55A and 55B is returned to the original private chambers 55A and 55B. It is preferable that the opening / closing control is performed by a control unit (computer). Alternatively, each interlocking valve may be opened and closed manually. That is, when the interlocking valves 100A are open and the interlocking valves 101A to 105A are closed, the interlocking valves 100B are open and the interlocking valves 101B to 105B are closed. Similarly, when the interlocking valves 101A are open and the interlocking valves 100A, 102A to 105A are closed, the interlocking valves 101B are open and the interlocking valves 100B, 102B to 105B are closed. When the interlocking valves 102A are open and the interlocking valves 100A, 101A, 103A to 105A are closed, the interlocking valves 102B are open and the interlocking valves 100B, 101B, 103B to 105B are closed. When the interlocking valves 103A are open and the interlocking valves 100A to 102A, 104A, 105A are closed, the interlocking valves 103B are open and the interlocking valves 100B to 102B, 104B, 105B are closed. When the interlocking valves 104A are open and the interlocking valves 100A to 103A and 105A are closed, the interlocking valves 104B are open and the interlocking valves 100B to 103B and 105B are closed. When the interlocking valves 105A are open and the interlocking valves 100A to 104A are closed, the interlocking valves 105B are open and the interlocking valves 100B to 104B are closed. The carbon dioxide-rich absorbent 3 that has absorbed the carbon dioxide in the exhaust gas and returned to the private chambers 55A and 55B becomes uniform with respect to the carbon dioxide-rich absorbent 3 originally remaining in the private chambers 55A and 55B. As such, it diffuses in each of the private rooms 55A and 55B.

The exhaust gas flowing into the separator chamber 68 together with the jet of the carbon dioxide rich absorbing liquid 3 is sent to the adjacent exhaust chamber 74 via the conduit 73 after the carbon dioxide is removed. The exhaust gas sent to the exhaust chamber 74 is further purified by a filter 75 (mesh screen or the like) and released into the atmosphere through the exhaust pipe 76. As described above, in the moving body 51 of the present embodiment, since carbon dioxide is removed from the exhaust gas, it is possible to significantly reduce the release of carbon dioxide into the atmosphere due to the movement.

A pretreatment device (sulfurization device, three-way catalyst device, etc.) is installed in the middle of the exhaust system 65, and before the exhaust gas is supplied to the exhaust duct 66, the hydrocarbon (HC) in the exhaust gas is one. Harmful substances such as carbon oxide (CO), sulfur oxides (SOx), nitrogen oxides (NOx), and particulate matter (PM) may be removed.

The operation when the moving body 51 is used as the second moving body 34 is also substantially the same as described above. When used as the second moving body 34, the carbon dioxide lean absorbing liquid 4 is stored in the storage unit 55 instead of the carbon dioxide rich absorbing liquid 3. The carbon dioxide lean absorbing liquid 4 pumped up to the upper part of the storage part 55 by the action of the pump part 62 is jetted from the jet nozzle 64 toward the obstruction plate 71 on the downstream side as a jet. The carbon dioxide in the exhaust gas is absorbed by the carbon dioxide lean absorbing liquid 4. Since the carbon dioxide lean absorbing liquid 4 is an absorbing liquid having a large capacity for absorbing carbon dioxide, it can absorb carbon dioxide in the exhaust gas up to the limit amount. The carbon dioxide lean absorbing liquid 4 that has absorbed carbon dioxide is returned to the private chambers 55A and 55B of the storage portion 55 via the third pipe portion 72 by the action of gravity. The exhaust gas from which carbon dioxide has been removed is purified by a filter 75 in the exhaust chamber 74 and released into the atmosphere.

According to the first embodiment, the following can be said. The carbon dioxide recovery system 10 has an absorption tower site 31 for obtaining a carbon dioxide-rich absorption liquid 3 by absorbing carbon dioxide supplied from a gaseous carbon dioxide supply source into a carbon dioxide lean absorption liquid 4, and a carbon dioxide-rich absorption liquid. A carbon dioxide lean absorber 4 that desorbs carbon dioxide from 3 and a regeneration tower site 32 that recovers carbon dioxide, and a carbon dioxide rich absorber 3 that has a first reservoir and is stored in the first reservoir. It has a first moving body 33 for transporting from the absorption tower site 31 to the regeneration tower site 32 and a second storage portion, and the carbon dioxide lean absorbing liquid 4 stored in the second storage portion is transferred from the regeneration tower site 32 to the absorption tower site. The second moving body 34 to be transported to 31 and the carbon dioxide rich absorbing liquid 3 provided in the first moving body 33 and generated from the first moving body 33 are absorbed in the carbon dioxide rich absorbing liquid 3 stored in the first storage unit 55. 1 Absorbing unit and a second absorbing unit provided in the second moving body 34 to absorb carbon dioxide generated from the second moving body 34 into the carbon dioxide lean absorbing liquid 4 stored in the second storage unit. Be prepared.

According to this configuration, the carbon dioxide generated from the moving body 51 can also be recovered by the first absorption unit and the second absorption unit. As a result, in the carbon dioxide recovery system 11, it is possible to minimize the trouble that the moving body 51, which is a component thereof, becomes a source of carbon dioxide.

The moving body 51 extends from the internal combustion engine 53, a storage unit 55 for storing the carbon dioxide rich absorbing liquid 3 or the carbon dioxide lean absorbing liquid 4, and the exhaust system 65 extending from the internal combustion engine 53 and through which exhaust gas containing carbon dioxide is passed. And, the carbon dioxide in the exhaust gas is put into the carbon dioxide rich absorption liquid 3 or the carbon dioxide lean absorption liquid 4 supplied from the storage unit 55 in the absorption unit 56 provided in the middle of the exhaust system 65. It is provided with an absorption unit 56 for absorbing.

According to this configuration, the carbon dioxide in the exhaust gas generated from the moving body 51 can be absorbed by the carbon dioxide rich absorbing liquid 3 or the carbon dioxide lean absorbing liquid 4 in the storage portion 55. This minimizes the problem that carbon dioxide generated from the moving body 51 is discharged into the environment when the carbon dioxide rich absorbing liquid 3 or the carbon dioxide lean absorbing liquid 4 is transported by using the moving body 51. Can be suppressed to.

The absorption unit 56 is a pump unit 62 that sends the carbon dioxide rich absorption liquid 3 or the carbon dioxide lean absorption liquid 4 to the absorption unit 56, and includes a pump unit 62 to which driving force is supplied from the internal combustion engine 53. According to this configuration, the pump unit 62 can be driven by the driving force from the internal combustion engine 53, and the motor is driven to send the carbon dioxide rich absorber 3 or the carbon dioxide lean absorber 4 toward the absorber 56. No need for a pump. As a result, the weight of the moving body 51 can be reduced, and the total amount of carbon dioxide generated during transportation by the moving body 51 can be reduced.

In the following embodiment, the parts different from the first embodiment will be mainly described. Illustrations and explanations of parts common to the first embodiment will be omitted.
[Second Embodiment]

The moving body 51 of the second embodiment will be described with reference to FIG. The absorption unit 56 is formed in a so-called spray shape in which the absorption liquid is sprayed onto the contact mechanism 85 to absorb carbon dioxide from the exhaust gas.

The storage unit 55 is composed of a general tank for a tank truck, and has a plurality of private rooms inside. In the present embodiment, the storage unit 55 has, for example, a front first private room 55A and a rear second private room 55B. Although two private rooms are shown in FIG. 3, the number of private rooms is not limited to this, and the storage unit 55 may have three or more private rooms.

The absorption unit 56 is provided in the middle of the first pipe portion 61, which is connected to the bottoms of the first private chamber 55A and the second private chamber 55B of the storage portion 55 and joins as one pipe on the downstream side, and the first pipe portion 61. The first three-way valve 82, the pump part 62 connected to the downstream end of the first pipe part 61, the second pipe part 63 extending from the pump part 62 to the upper side of the storage part 55, and the middle of the second pipe part 63. At the end opposite to the end connected to the second three-way valve 83, the exhaust duct 66 extending horizontally in a duct shape at the top of the storage portion 55, and the pump portion 62 of the second pipe portion 63. From a plurality of spray nozzles 84 located and provided in the exhaust duct 66, a plurality of porous filter-like contact mechanisms 85 provided in the exhaust duct 66 at positions facing the plurality of spray nozzles 84, and an internal combustion engine 53. The exhaust system 65 extending to the upstream end of the exhaust duct 66, the third pipe portion 72 extending from the intermediate portion of the exhaust duct 66 to the first private chamber 55A of the storage portion 55, and the storage portion 55 from the downstream end of the exhaust duct 66. A fourth pipe portion 86 extending to the second private chamber 55B, an exhaust pipe 76 provided at the downstream end of the exhaust duct 66, a filter 75 (mesh screen, etc.) provided in the middle of the exhaust pipe 76, and an exhaust duct 66. It has a plurality of partition plates 87 that partition the inside into a plurality of chambers. The plurality of spray nozzles 84 are provided in series in the exhaust duct 66 at predetermined intervals. Similarly, the plurality of contact mechanisms 85 are provided in series in the exhaust duct 66 at predetermined intervals. The plurality of partition plates 87 have ventilation holes 87A for passing exhaust gas toward the downstream side.

The first pipe portion 61 joins one pipe line via the first three-way valve 82. The second pipe portion 63 is branched into two pipes, the first auxiliary pipe 63A and the second auxiliary pipe 63B, via the second three-way valve 83 on the downstream side. The first auxiliary pipeline 63A is further branched into a plurality of pipelines on the downstream side and is connected to each of the plurality of spray nozzles 84. The second auxiliary pipeline 63B is further branched into a plurality of pipelines on the downstream side and is connected to each of the plurality of spray nozzles 84.

The first three-way valve 82 can switch between a state in which the pump unit 62 is connected to the first private room 55A and a state in which the pump unit 62 is connected to the second private room 55B. In the present embodiment, the first three-way valve 82 is a method of manually switching, but the first three-way valve 82 is configured by a solenoid valve and automatically connected by control from a separately provided control unit (computer). You may switch the state.

The second three-way valve 83 can switch between a state in which the pump unit 62 is connected to the first auxiliary pipe line 63A and a state in which the pump unit 62 is connected to the second auxiliary pipe line 63B. In the present embodiment, the second three-way valve 83 is a method of manually switching, but the second three-way valve 83 is configured by a solenoid valve and automatically connected by control from a separately provided control unit (computer). You may switch the state.

The spray nozzle 84 is composed of a nozzle that takes into consideration the optimum particle size, particle size distribution, and spray pattern of the droplet to be ejected. The contact mechanism 85 is formed, for example, by laminating sheet-shaped steel wool in a plurality of layers in the thickness direction. The spray nozzle 84 can inject a mist-like absorbing liquid onto the contact mechanism 85 and uniformly wet the contact mechanism 85 with the absorbing liquid.

The structure of the contact mechanism 85 is not limited to the above. Examples of the contact mechanism 85 include fillings, shelves, sprays, fluidized fillings, liquid film cross-flow contacting materials, high-speed swirling flow-type fillings, mechanical force-based fillings, and combinations thereof, which are effective. It is not particularly limited as long as it has a sufficient contact area and mass transfer amount.

Subsequently, the operation of the moving body 51 of the present embodiment will be described. When the moving body 51 is used as the first moving body 51 for transporting the carbon dioxide-rich absorbing liquid 3 from the absorbing tower site 31 to the regenerating tower site 32, the storage portion 55 of the moving body 51 (first private chamber 55A and The carbon dioxide-rich absorbing liquid 3 is stored in the second private room 55B). When the moving body 51 is used as the second moving body 51 for transporting the carbon dioxide lean absorbing liquid 4 from the regeneration tower site 32 to the absorbing tower site 31, the carbon dioxide lean is contained in the storage portion 55 of the moving body 51. The absorption liquid 4 is stored. Hereinafter, the operation when the moving body 51 is used as the first moving body 51 will be mainly described. In the initial state, it is assumed that the first three-way valve 82 is in a state in which the pump portion 62 and the first private chamber 55A are connected (first state). In the initial state, it is assumed that the second three-way valve 83 is in a state in which the pump portion 62 and the first auxiliary pipe line 63A are connected (third state).

When the moving body 51 travels, propulsive force is generated by driving the internal combustion engine 53, and exhaust gas containing carbon dioxide is generated due to a combustion explosion of fuel (light oil or the like). The exhaust gas flows inside the exhaust system 65 and is guided upstream of the exhaust duct 66. On the other hand, the pump unit 62, which receives rotational power from the internal combustion engine 53, is rotationally driven from the first private chamber 55A of the storage unit 55 to the carbon dioxide rich absorber 3 via the first pipe portion 61 and the second pipe portion 63. Is pumped up to the upper part of the storage portion 55.

The spray nozzle 84 ejects the carbon dioxide-rich absorbent liquid 3 whose high pressure is increased by the action of the pump unit 62 toward the contact mechanism 85 in the form of mist. The contact mechanism 85 is uniformly wetted by the mist-like carbon dioxide-rich absorbent liquid 3. The exhaust gas flows through the exhaust duct 66 and passes through the contact mechanism 85 from the upstream side to the downstream side. At that time, when the exhaust gas comes into contact with the carbon dioxide-rich absorbing liquid 3 in the contact mechanism 85, the carbon dioxide in the exhaust gas is taken into the carbon dioxide-rich absorbing liquid 3. The carbon dioxide-rich absorbing liquid 3 takes in a larger amount of carbon dioxide than the carbon dioxide lean absorbing liquid 4, but does not take in carbon dioxide to the limit that can be absorbed. Therefore, if the concentration level of carbon dioxide in the exhaust gas generated from the internal combustion engine 53 is high, carbon dioxide can be taken into the carbon dioxide rich absorbent 3 without any problem.

The carbon dioxide-rich absorbent liquid 3 that has absorbed carbon dioxide in the contact mechanism 85 collects in the lower part of the exhaust duct 66 and is returned to the first private chamber 55A via the third pipe portion 72 by the action of gravity. The carbon dioxide-rich absorbent 3 that has absorbed the carbon dioxide in the exhaust gas and returned to the first private chamber 55A is the first so as to be uniform with respect to the carbon dioxide-rich absorbent 3 originally remaining in each private chamber 55A. It diffuses in one private room 55A.

Exhaust gas that has passed through the plurality of contact mechanisms 85 is depleted of carbon dioxide and sent to the downstream side of the exhaust duct 66. The exhaust gas sent to the downstream side of the exhaust duct 66 is further purified by a filter 75 (mesh screen or the like) and released into the atmosphere through the exhaust pipe 76. As described above, in the moving body 51 of the present embodiment, since carbon dioxide is removed from the exhaust gas, it is possible to significantly reduce the release of carbon dioxide into the atmosphere due to the movement.

A pretreatment device (sulfurization device, three-way catalyst device, etc.) is installed in the middle of the exhaust system 65, and before the exhaust gas is supplied to the exhaust duct 66, the hydrocarbon (HC) in the exhaust gas is one. Harmful substances such as carbon oxide (CO), sulfur oxides (SOx), nitrogen oxides (NOx), and particulate matter (PM) may be removed.

The driver who drives the moving body 51 may switch the connection state of the first three-way valve 82 and the second three-way valve 83 at a predetermined timing, for example, every time the moving body 51 moves 100 to 200 km. That is, the driver has connected the first three-way valve 82 from the state in which the pump unit 62 and the first private room 55A are connected (first state) to the state in which the pump unit 62 and the second private room 55B are connected (second state). Can be manually switched to. Further, at the same time as the above switching of the first three-way valve 82, the driver changes the second three-way valve 83 from the state in which the pump section 62 and the first auxiliary pipe line 63A are connected (third state) to the pump section 62 and the first. 2 It is possible to manually switch to the state in which the auxiliary pipeline 63B is connected (fourth state).

As a result, the pump unit 62 is rotationally driven to pump the carbon dioxide-rich absorbing liquid 3 from the second private chamber 55B of the storage unit 55 to the upper part of the storage unit 55 via the first pipe unit 61 and the second pipe unit 63. The spray nozzle 84 ejects the carbon dioxide-rich absorbent liquid 3 whose high pressure is increased by the action of the pump unit 62 toward the contact mechanism 85 in the form of mist. The contact mechanism 85 is uniformly wetted by the mist-like carbon dioxide-rich absorbent liquid 3. The exhaust gas flows through the exhaust duct 66 and passes through the contact mechanism 85 from the upstream side to the downstream side. At that time, when the exhaust gas comes into contact with the carbon dioxide-rich absorbing liquid in the contact mechanism 85, the carbon dioxide in the exhaust gas is taken into the carbon dioxide-rich absorbing liquid 3.

The carbon dioxide-rich absorbent liquid 3 that has absorbed carbon dioxide in the contact mechanism 85 collects in the lower part of the exhaust duct and is returned to the second private chamber 55B via the fourth pipe portion 86 by the action of gravity. The carbon dioxide-rich absorbent liquid 3 that has absorbed the carbon dioxide in the exhaust gas and returned to the second private chamber 55B is made uniform with respect to the carbon dioxide-rich absorbent liquid 3 that originally remained in the second private chamber 55B. Spread. In this way, by switching the connection state of the first three-way valve 82 and the second three-way valve 83 at a predetermined timing, it is possible to prevent the amount of carbon dioxide possessed from varying between the private rooms. As a result, only the carbon dioxide-rich absorber 3 in one private room protrudes and the amount of carbon dioxide possessed increases, and the carbon dioxide-rich absorbent liquid 3 in the other private room decreases the amount of carbon dioxide possessed. Can be prevented.

The operation when the moving body 51 is used as the second moving body 51 is almost the same as the above. When used as the second moving body 51, the carbon dioxide lean absorbing liquid 4 is stored in the storage unit 55 (first private room 55A and second private room 55B) instead of the carbon dioxide rich absorbing liquid 3. .. The carbon dioxide lean absorbing liquid 4 pumped up to the upper part of the storage part 55 by the action of the pump part 62 is ejected in a mist form from the spray nozzle 84 toward the contact mechanism 85. When the exhaust gas passes through the contact mechanism 85, the carbon dioxide in the exhaust gas is absorbed by the carbon dioxide lean absorbing liquid 4. The carbon dioxide lean absorbing liquid 4 that has absorbed carbon dioxide is returned to the first private chamber 55A or the second private chamber 55B of the storage portion 55 via the third pipe portion 72 or the fourth pipe portion 86. Since the carbon dioxide lean absorbing liquid 4 is an absorbing liquid having a large capacity for absorbing carbon dioxide, it can absorb carbon dioxide in the exhaust gas up to the limit amount. The exhaust gas from which carbon dioxide has been removed is purified by the filter 75 and released into the atmosphere. Similar to the case where the moving body 51 is used as the first moving body 51, the driver switches the connection state of the first three-way valve 82 between the first state and the second state at a predetermined timing, and the second three-way valve 82 is used. The connection state of the valve 83 may be switched between the third state and the fourth state.

In this embodiment, since the storage unit 55 is provided with the first private room 55A and the second private room 55B, for example, the carbon dioxide rich absorbent liquid 3 is stored in the first private room 55A and the second private room 55B. The absorption liquid having different properties may be stored in each private room, such as storing the carbon dioxide lean absorption liquid 4. Even in that case, there is no problem that the carbon dioxide-rich absorbent 3 in the first private chamber 55A and the carbon dioxide lean absorbent 4 in the second private chamber 55B are mixed during the movement of the moving body 51. ..

The above-described embodiment can be implemented with various replacements and modifications. That is, the moving body 51 of the first embodiment and the second embodiment is composed of a vehicle such as a tank lorry, but is not limited to this, and may be composed of a vehicle such as a diesel locomotive other than the tank lorry. It may be composed of a ship such as a tanker. When the moving body 51 is composed of a ship such as a tanker, the connection state of the first three-way valve 82 is switched between the first state and the second state, and the connection state of the second three-way valve 83 is the third state. The timing for switching between the fourth state and the fourth state may be every time the moving body 51 moves several thousand kilometers. Further, one invention can be constructed by appropriately combining the components of the inventions of different embodiments.

1 Gaseous carbon dioxide source 2 Processing gas 3 Carbon dioxide rich absorbent 4 Carbon dioxide lean absorber 5 Carbon dioxide 10 Carbon dioxide recovery system 11 Absorption tower 12 Regeneration tower 31 Absorption tower site 32 Regeneration tower site 33 First moving object 34 Second moving body 51 Moving body 53 Internal combustion engine 55 Storage part 56 Absorption part 62 Pump part 65 Exhaust system

Claims (5)

An absorption tower site that obtains a carbon dioxide-rich absorbent by absorbing carbon dioxide supplied from a gaseous carbon dioxide source into a carbon dioxide lean absorber.
A regeneration tower site that desorbs carbon dioxide from the carbon dioxide-rich absorbent and recovers the carbon dioxide lean absorber and carbon dioxide.
A first moving body having a first storage unit and transporting the carbon dioxide-rich absorbent liquid stored in the first storage unit from the absorption tower site to the regeneration tower site.
A second moving body having a second storage portion and transporting the carbon dioxide lean absorbing liquid stored in the second storage portion from the regeneration tower site to the absorption tower site.
A first absorbing unit provided in the first moving body and absorbing carbon dioxide generated from the first moving body into the carbon dioxide-rich absorbing liquid stored in the first storage unit.
A second absorbing unit provided in the second moving body and absorbing carbon dioxide generated from the second moving body into the carbon dioxide lean absorbing liquid stored in the second storage unit, and a second absorbing unit.
A carbon dioxide recovery system equipped with. The carbon dioxide lean absorption liquid and the carbon dioxide rich absorption liquid are absorption liquids containing an absorbent.
The carbon dioxide recovery system according to claim 1, wherein the absorbent is an amine compound. With an internal combustion engine
A storage unit that stores carbon dioxide-rich absorbent or carbon dioxide lean absorbent, and
An exhaust system that extends from the internal combustion engine and allows exhaust gas containing carbon dioxide to pass through.
An absorption unit provided in the middle of the exhaust system, which absorbs the carbon dioxide in the exhaust gas into the carbon dioxide-rich absorption liquid or the carbon dioxide lean absorption liquid supplied from the storage unit. ,
A moving body equipped with. The third aspect of claim 3, wherein the absorption unit is a pump unit that sends the carbon dioxide-rich absorbing liquid or the carbon dioxide lean absorbing liquid to the absorbing unit, and includes a pump unit to which a driving force is supplied from the internal combustion engine. Moving body. The carbon dioxide lean absorption liquid and the carbon dioxide rich absorption liquid are absorption liquids containing an absorbent.
The mobile body according to claim 3 or 4, wherein the absorbent is an amine compound.

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