JP2020131166A - Carbon dioxide adsorption equipment - Google Patents

Abstract

To provide carbon dioxide adsorption equipment capable of efficiently removing carbon dioxide in atmosphere.SOLUTION: Carbon dioxide adsorption equipment has a cooler for cooling a heated refrigerant with atmosphere and an adsorber for adsorbing carbon dioxide in the atmosphere. The cooler has an air current generation unit for generating an air current with the atmosphere and a cooling unit for cooling the refrigerant with the air current generated by the air current generation unit. The adsorber has an adsorbent layer having air permeability, and the adsorbent layer has an adsorbent capable of adsorbing carbon dioxide, and the adsorber is positioned so that the air current passes through the adsorbent layer.SELECTED DRAWING: Figure 2

Description

The present invention relates to a carbon dioxide adsorption facility provided with an adsorption device for adsorbing carbon dioxide in the atmosphere.

In recent years, as a measure against global warming, efforts have been made in various fields to reduce the emission of carbon dioxide, which is a greenhouse gas.
In addition to efforts to reduce emissions, it is also being considered to remove carbon dioxide from the atmosphere.
Regarding such an examination, the following Patent Document 1 describes technical matters for removing carbon dioxide from the atmosphere by using an adsorbent having an ability to adsorb carbon dioxide.

In the method of removing carbon dioxide from the atmosphere using an adsorbent, the adsorbent that can regenerate the adsorption performance by desorbing the carbon dioxide adsorbed by heating or evacuation (hereinafter also referred to as "renewable adsorbent"). Is used.
Then, in such a method using a renewable adsorbent, carbon dioxide is removed by heating the renewable adsorbent in the air when a sufficient amount of carbon dioxide is adsorbed on the renewable adsorbent. Separation treatment is performed, and air containing a high concentration of carbon dioxide is recovered and processed.
That is, as such a method for recovering carbon dioxide from the atmosphere, as described in paragraph 0004 of Patent Document 1, a method in which adsorption and desorption are repeated (a cyclic adaptation / destruction process). It has been known.

US Patent Publication US2017 / 0106330A1

Since the concentration of carbon dioxide in the atmosphere is much smaller than that of nitrogen, oxygen, etc., consideration is given to efficiently adsorbing carbon dioxide to the adsorbent by a method using an adsorbent as described in Patent Document 1. Then, it is considered desirable that the adsorbent layer provided with the adsorbent has good air permeability and a large specific surface area.
However, if the air flow to the adsorbent layer depends on the natural wind, it may take a long time for the adsorbent to adsorb a sufficient amount of carbon dioxide.
On the other hand, it is thought that the adsorption of carbon dioxide is promoted by forcibly passing the atmosphere through the adsorbent layer with a blower or the like, but power is required to operate the blower, and the power consumption to obtain this power is required. May become a new factor in the generation of carbon dioxide.

For this reason, the conventional carbon dioxide adsorption facility has room for improvement in order to efficiently remove carbon dioxide in the atmosphere.
The present invention has been made in view of these points, and an object of the present invention is to provide a carbon dioxide adsorption facility capable of efficiently removing carbon dioxide in the atmosphere.

As a result of diligent studies by the present inventor focusing on the above-mentioned problems, in the refrigeration cycle in air conditioning and district heating and cooling, airflow by the atmosphere is routinely generated in order to cool the refrigerant such as water and hydrofluorocarbon. We have found that the above problems can be solved by effectively utilizing this air conditioner for the adsorption of carbon dioxide, and have completed the present invention.

That is, in order to solve the above problems, the present invention includes a cooling device for cooling the heated refrigerant in the atmosphere and an adsorption device for adsorbing carbon dioxide in the atmosphere, and the cooling device is based on the atmosphere. The adsorbent is provided with an air flow generating unit for generating an air flow and a cooling unit for cooling the refrigerant with the air flow generated by the air flow generating unit, and the adsorbing device includes an adsorbent layer having air permeability. The layer is provided with a carbon dioxide adsorbent capable of adsorbing carbon dioxide, and the adsorber provides a carbon dioxide adsorption facility in which the air flow is arranged so as to pass through the adsorbent layer.

According to the present invention, the airflow used for cooling the refrigerant can be effectively used for adsorbing carbon dioxide, so that carbon dioxide in the atmosphere can be efficiently removed.

Schematic diagram of the facility where the carbon dioxide adsorption facility is installed. The schematic perspective view which showed a part of the carbon dioxide adsorption equipment of one Embodiment. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 6 is a schematic view showing an example of an open / closed state of a damper (cross-sectional view taken along the line BB in FIG. 2). The schematic perspective view which showed the carbon dioxide adsorption equipment which concerns on another embodiment. The schematic perspective view which showed the carbon dioxide adsorption equipment which concerns on another embodiment. FIG. 6 is a schematic view showing how the adsorbent layer is regenerated by the carbon dioxide adsorption facility of FIG. The schematic perspective view which showed the carbon dioxide adsorption equipment which concerns on another embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing the configuration of the facility X in which the carbon dioxide adsorption facility 1 is installed. As shown in the figure, the carbon dioxide adsorption facility 1 of the present embodiment uses a refrigeration cycle. It is attached to the facility 2 where the cooling is performed.

The facility 2 provided in the facility X together with the carbon dioxide adsorption facility 1 has a device for cooling using a refrigeration cycle, and includes an air conditioner 21 as the device.
More specifically, the refrigerating cycle in the equipment 2 is a heat pump type refrigerating cycle, and in the equipment 2, the cooling target is cooled by the refrigerant and the refrigerant whose temperature has risen due to the heat taken from the cooling target is compressed. That, cooling the compressed refrigerant, releasing the pressure of the cooled refrigerant to expand it, and then performing the cooling again with the refrigerant whose temperature has dropped due to the expansion are performed. ing.
The air conditioner 21 of the present embodiment includes a refrigerator 211 provided with a compression unit (not shown) for compressing the refrigerant to a state where the temperature drops sufficiently by expanding.
The air conditioner 21 further includes an indoor heat exchanger 212 for exchanging heat with indoor air in a state where the refrigerant supplied from the refrigerator 211 has a temperature lowered due to expansion, and the indoor heat exchanger 212 includes the indoor heat exchanger 212. It is configured to allow air conditioning in the facility.

As shown in FIGS. 1 and 2, the carbon dioxide adsorption facility 1 includes a cooling tower 11 for releasing the exhaust heat of the refrigerator 211 into the atmosphere.
That is, the cooling tower 11 of the present embodiment is provided in the facility X as a cooling device for cooling the refrigerant heated by the refrigerator 211 in the atmosphere.

In the facility X, a non-organic compound (non-organic refrigerant) is used as a refrigerant for heat transport between the refrigerator 211 and the cooling tower 11, and the refrigerator 211 and the indoor heat exchanger 212 are used. An organic compound (organic refrigerant) is used as a refrigerant for transporting heat between them.
Specifically, in the facility X, water is used as the non-organic refrigerant, and hydrofluorocarbon is used as the organic refrigerant.

The facility X is configured such that the hydrofluorocarbon circulates between the refrigerator 211 and the indoor heat exchanger 212. More specifically, the hydrofluorocarbon is decompressed and expanded to lower the temperature, and the temperature is lowered. The hydrofluorocarbon has taken heat from the indoor air, and the hydrofluorocarbon that has taken heat from the indoor air is returned to the refrigerator 211, and the hydrofluorocarbon is compressed by the refrigerator 211 to raise the temperature, and the temperature rises. The elevated hydrofluorocarbon is cooled by heat exchange with the water and then sent to the indoor heat exchanger 212 again.

The facility X is configured such that the water circulates between the refrigerator 211 and the cooling tower 11, and more specifically, heat exchange with the hydrofluorocarbon (hydrofluorocarbon that has been compressed and the temperature has risen). The water that has become hot water is sent to the cooling tower 11, and the hot water is cooled by the airflow F by the atmosphere in the cooling tower 11, and the cooled water is sent to the refrigerator 211 again. ing.

The cooling tower 11 of the present embodiment includes an airflow generating unit 111 for generating the airflow F by the atmosphere, and a cooling unit 112 for cooling the refrigerant with the airflow generated by the airflow generating unit 111. ..
The carbon dioxide adsorption facility 1 includes an adsorption device 12 for adsorbing carbon dioxide in the atmosphere together with the cooling tower 11.
As shown in FIG. 3 and the like, the adsorbent 12 includes an adsorbent layer 121, and the adsorbent layer 121 is provided with an adsorbent AD capable of adsorbing carbon dioxide.
The adsorption device 12 includes the adsorbent layer 121 having air permeability, and is arranged in the carbon dioxide adsorption facility 1 so that the air flow F due to the atmosphere passes through the adsorbent layer 121.

As will be described later, the adsorbent layer 121 of the present embodiment is provided with a renewable adsorbent that releases the adsorbed carbon dioxide by an operation such as heating to regenerate the adsorbing ability for carbon dioxide.
The carbon dioxide adsorption facility 1 is provided with a carbon dioxide recovery device 13 for recovering carbon dioxide generated by the regeneration operation of the adsorbent.
The carbon dioxide adsorption facility 1 is for transporting the carbon dioxide to the carbon dioxide recovery device 13 when the adsorbent AD releases the carbon dioxide adsorbed up to that point by heating the adsorbent layer 121 or the like. The transport device 14 is provided.
The carbon dioxide adsorption facility 1 further includes a photovoltaic power generation device 15.

The cooling tower 11 in the present embodiment may be a cross-flow type or a counter-flow type, and may be a square type or a round type.
The cooling tower 11 in the present embodiment may be an open type or a closed type.
The cooling tower 11 in the present embodiment illustrated below is a cross-flow type and a square type open type.

The cooling tower 11 includes a sprinkling unit 113 for sprinkling the water to be cooled, and the cooling unit 112 for cooling the water by evaporating a part of the water sprinkled by the sprinkling unit 113. ..
The cooling tower 11 is provided with a cavity V in the center of the tower, and at least a part of the side wall W surrounding the cavity V is the cooling unit 112.

The cooling tower 11 in the present embodiment is provided with a side wall portion W that has a square tubular shape and surrounds the cavity portion V.
The side wall portion W is provided so as to be open at the top and bottom, and a pair of side walls w1 and w2 (hereinafter, "first side wall w1") facing each other via the cavity portion V in the first direction D1 parallel to the horizontal plane. , "Second side wall w2") and a pair of side walls w3, w4 (hereinafter, "third side wall w4") that face each other through the cavity in the second direction D2 that is parallel to the horizontal plane and orthogonal to the first direction. It also has a side wall w3 ”and a“ fourth side wall w4 ”).
In the following, the first direction D1 may be referred to as a "length direction" and the second direction D2 may be referred to as a "width direction".
Further, in the following, the third direction D3 orthogonal to both the first direction D1 and the second direction D2 may be referred to as a "height direction" or a "vertical direction".
The shape and capacity of the cooling tower 11 are not particularly limited, but the cooling tower 11 in the present embodiment has, for example, dimensions of 1 m or more in the length direction, the width direction, and the height direction. Therefore, a water having a maximum circulating water volume of 300 m ³ / h or more can be adopted.

The airflow generating portion 111 includes a large-diameter nozzle 111a located above the cavity portion V and extending upward, and a blower 111b housed in the nozzle.
The blower 111b is arranged so as to form an air flow F that moves upward inside the nozzle 111a when driven.
That is, the airflow generating portion 111 is configured so that the air in the cavity portion V can be sucked out by the blower 111b and moved upward.

As described above, the cooling tower 11 of the present embodiment includes the sprinkling unit 113 for sprinkling the water to be cooled, and cools the water by evaporating a part of the water sprinkled by the sprinkling unit 113. A cooling unit 112 is provided, and the cooling tower 11 is provided with a cavity V in the center of the tower, and at least a part of the side wall portion W surrounding the cavity V is the cooling unit 112 and the cooling unit 112 is provided. The airflow generating unit 111 has air permeability, and the airflow F is discharged from the cavity V to the outside of the tower again so that the air outside the tower that has flowed into the cavity V through the cooling unit 112 is discharged from the cavity V again. It is causing it.

The blower 111b in the present embodiment is not particularly limited, but may be a propeller type axial fan or the like.

In the cooling tower 11 of the present embodiment, the first side wall w1 and the second side wall w2 serve as the cooling unit 112.
Each of the first side wall w1 and the second side wall w2 is erected so as to be inclined upward slightly outward from the vertical, and is formed in a board shape by one or a plurality of filler units. It is composed of a filler board 112a and an eliminator 112b having substantially the same size as the filler board 112a and having a thickness thinner than that of the filler board 112a.
The eliminator 112b is arranged so as to face the filler board 112a in the first direction D1 and is arranged between the filler board 112a and the cavity V.

The filler board 112a includes a plurality of fillers, and an appropriate gap is provided between the fillers in order to ensure air permeability in the thickness direction.
That is, the filler board 112a of the present embodiment has excellent air permeability.
Further, the eliminator 112b also has air permeability like the filler board 112a.

The third side wall w3 and the fourth side wall w4 in the present embodiment are composed of a plate having substantially no air permeability.
That is, the cooling tower 11 of the present embodiment has better air permeability than the third side wall w3 and the fourth side wall w4 when the blower 111b of the airflow generating unit 111 is driven. And the atmosphere outside the tower is guided to the cavity V through the second side wall w2.

The watering portion 113 is configured so that water (warm water) heated by the refrigerator 211 can be sprinkled on the upper end portion of the filler board 112a.
The sprinkler portion 113 has a hot water pit 113a provided above the upper ends of the first side wall w1 and the second side wall w2, and a hot water pipe 113b for supplying the hot water to the hot water pit 113a. ing.
The hot water pit 113a has a size corresponding to the upper end surface of the filler board 112a constituting the first side wall w1 and the second side wall w2.
That is, the hot water pit 113a has a shape that overlaps the upper end surface of the filler board 112a when viewed in the third direction D3.
A plurality of through holes 113h penetrating vertically are bored in the bottom wall of the hot water pit 113a.
The through hole 113h is provided over the entire bottom wall of the hot water pit 113a.
That is, the sprinkling section 113 of the present embodiment is configured so that the hot water supplied to the hot water pit 113a can be sprinkled over substantially the entire upper end surface of the filler board 112a.

The cooling unit 112 passes through the filler board 112a while the hot water moves from the upper end portion to the lower end portion of the filler board 112a along the filler provided in the filler board 112a. It is configured so that a part of the hot water can be evaporated to change the hot water into cold water.
The eliminator 112b has the same air permeability as the filler board 112a, but prevents water droplets generated by water moving along the filler board 112a from moving to the cavity side through the eliminator 112b. It is composed of board-shaped members with smaller gaps than the filler unit so that it can be used.

The cooling tower 11 of the present embodiment further includes a chilled water pit 115a for storing water (cold water) after being cooled by the cooling portion 112 below the side wall portion W and the cavity portion V, and the chilled water pit It is configured so that the water of 115a can be supplied to the refrigerator 211.

As described above, the adsorbent 12 of the present embodiment includes the adsorbent layer 121 having air permeability, and the adsorbent layer 121 is provided with the adsorbent AD capable of adsorbing carbon dioxide.
The adsorption device 12 is configured so that the carbon dioxide contained in the airflow F can be adsorbed on the adsorbent AD when the airflow F generated by the blower 111b passes through the adsorbent layer 121.
The adsorbent AD is not particularly limited, but is preferably a renewable adsorbent that is regenerated by releasing carbon dioxide adsorbed by heating.
As such a renewable adsorbent, for example, a substrate coated with a carbon dioxide absorbent selected from amines and the like can be used.
The carbon dioxide absorber may be supported on the substrate by a surface treatment other than coating.
Examples of the substrate include resin members and the like.
The substrate for supporting the carbon dioxide absorber may be a porous body such as activated carbon, silica gel, diatomaceous earth, alumina, or zeolite.
That is, the adsorbent may be one in which the carbon dioxide absorbent is supported in the pores of the porous body, or one in which the surface is coated with the carbon dioxide absorbent.
Further, activated carbon, diatomaceous earth, alumina, zeolite and the like may be used as they are as a carbon dioxide adsorbent.

The specific shape of the adsorbent layer 121 is not particularly limited, and the adsorbent layer 121 can be formed of, for example, a plate-shaped member in which the adsorbent is supported on a lattice-shaped or honeycomb filter-shaped substrate. , A shape that does not easily cause pressure loss is preferable.
The adsorbent layer 121 may be composed of a plate-shaped member or the like in which a plurality of lumps containing the adsorbent are sandwiched between two wire meshes.
In this embodiment, one adsorbent layer may be provided with a plurality of types of adsorbents.

The adsorption device 12 has a duct 122 that is connected to the nozzle 111a and serves as a flow path for the air flow F, and the adsorbent layer 121 is housed in the duct.
The duct 122 of the suction device 12 includes a first duct portion 122a connected to the nozzle 111a and a second duct portion 122b connected to the first duct portion 122a on the side opposite to the nozzle 111a. ing.
The duct 122 is provided with a diffuser 122c for attracting an air flow outside the duct by an air flow flowing inside the duct.
The diffuser 122c is provided between the first duct portion 122a and the second duct portion 122b, and by providing a gap in the connecting portion between the first duct portion 122a and the second duct portion 122b. It is formed.

The adsorbent layer 121 in the present embodiment is provided in the second duct portion 122b.
The suction device 12 of the present embodiment includes a damper 122d for controlling the formation state of the air flow in the second duct portion 122b.
The adsorption device 12 of the present embodiment is configured to have the damper 122d so that at least a part of the adsorbent layer 121 can be accommodated in a closed space.
Specifically, the adsorption device 12 of the present embodiment has a first damper 122d1 that can be opened and closed on the upstream side of the adsorbent layer 121 in the flow direction of the air flow F, and a first damper 122d1 that can be opened and closed on the downstream side. The adsorbent layer 121 is accommodated between the first damper 122d1 and the second damper 122d2 by closing both the first damper 122d1 and the second damper 122d2. It is configured so that it can be a closed space.

The carbon dioxide adsorption facility 1 of the present embodiment has a pipe P for connecting the transport device 14 and the second duct portion 122b of the suction device 12, and the pipe P includes the first damper 122d1 and the said. One end is connected to the second damper 122d2.
That is, the second duct portion 122b has the opening OP in which the pipe P is opened between the first damper 122d1 and the second damper 122d2.

The pipe P is provided with an on-off valve that controls the inside of the pipe into an open state in which distribution is possible and a closed state in which distribution is not possible.
In the present embodiment, a solenoid valve MV is provided as the on-off valve.

A heat exchanger 122e for adjusting the temperature of the air flow is provided on the upstream side of the adsorbent layer 121.
The heat exchanger 122e in the present embodiment is provided between the second duct portion 122b and the adsorbent layer 121.

As described above, in the present embodiment, the airflow generating portion 111 is configured so that the air discharged from the cavity portion V to the outside of the tower passes through the adsorbent layer 121, and the airflow generating portion 111 is configured from the cavity portion V. A diffuser 122c for attracting the surrounding air to the airflow leading to the adsorbent layer 121 is further provided.
The duct 122 has a damper 122c1 that opens and closes a flow path for attracting the air outside the duct into the duct through the diffuser 122c, and is configured to be able to control the amount of air attracted from outside the duct. ing.

The adsorbent may easily adsorb carbon dioxide when the relative humidity of the atmosphere constituting the air flow is high.
Further, the adsorbent may easily adsorb carbon dioxide when the atmospheric temperature is low.
The atmosphere used for cooling hot water in the cooling tower 11 and discharged from the nozzle 111a has an advantage in being used for adsorbing carbon dioxide because the humidity is usually high.
On the other hand, the atmosphere discharged from the nozzle 111a may receive not only latent heat but also sensible heat from the hot water to increase the temperature, which may offset the advantages.
Therefore, in the present embodiment, the atmosphere outside the tower (the atmosphere around the duct) whose temperature is lower than the atmosphere discharged from the nozzle 111a is mixed by the diffuser 122c, and the temperature of the atmosphere passing through the adsorbent layer 121 is lowered. Is planned.

The adsorption device 12 of the present embodiment is provided with the heat exchanger 122e on the upstream side (upstream side in the flow direction of the air flow F) of the adsorbent layer 121 as described above.
Therefore, in the present embodiment, the temperature of the atmosphere passing through the adsorbent layer 121 can be lowered by the heat exchanger 122e instead of the diffuser 122c.
Both the diffuser 122c and the heat exchanger 122e may be used in combination to lower the temperature of the atmosphere.

The second duct portion 122b of the present embodiment has a partition wall 122b1 for dividing the flow path of the atmosphere after passing through the adsorbent layer 121 into a plurality of parts.
The partition wall b1 and the peripheral wall of the second duct portion 122b may be provided with a hollow portion as a double structure, or the hollow portion may be provided with a heat insulating material to have heat insulating properties.
The second duct portion 122b of the present embodiment has the partition wall 122b1 so that four flow paths of the first flow path c1, the second flow path c2, the third flow path c3, and the fourth flow path c4 are formed therein. Is provided.
That is, the second duct portion 122b uses the airflow F discharged from the nozzle 111a as the first airflow f1 flowing through the first flow path c1, the second airflow f2 flowing through the second flow path c2, and the third flow path. The partition wall 122b1 is provided so that the third airflow f3 flowing through the c3 and the fourth airflow f4 flowing through the fourth flow path c4 can be divided into four.
Then, in the present embodiment, the adsorption device 12 is provided with a plurality of the adsorbent layers 121, and the plurality of adsorbent layers include the first adsorbent layer 121a provided in the first flow path c1 and the second flow. A second adsorbent layer 121b provided on the path c2 is included.
Further, the plurality of adsorbent layers further include a third adsorbent layer 121c provided in the third flow path c3 and a fourth adsorbent layer 121d provided in the fourth flow path c4.

The first damper 122d1 and the second damper 122d2 are configured so that the open / closed state can be individually set in each of the flow paths c1, c2, c3, and c4.
That is, in the suction device 12 of the present embodiment, as shown in FIG. 4, the damper 122d in the other flow path is opened while the damper 122d is closed in the first flow path c1 so as not to form the first air flow f1. In this state, the second airflow f2, the third airflow f3, and the fourth airflow f4 can be formed.
Further, in the suction device 12 of the present embodiment, the damper 122d in the second flow path c2 is closed to prevent the second airflow f2 from being formed, and the damper 122d in the other flow path is opened. The airflow f1, the third airflow f3, and the fourth airflow f4 can be formed.
The airflow blocked by the damper 122d does not have to be one, and may be plural.

In the adsorption device 12 of the present embodiment, both the first damper 122d1 and the second damper 122d2 are closed in the first flow path c1 to accommodate the first adsorbent layer 121a in the closed space. (2) The adsorbent layer 121b, the third adsorbent layer 121c, and the fourth adsorbent layer 121d can pass the airflows f2, f3, and f4, respectively.
That is, the adsorption device 12 of the present embodiment is configured so that carbon dioxide can be adsorbed by the other adsorbent layer while keeping one of the plurality of adsorbent layers accommodated in the closed space. Has been done.

In the adsorption device 12 of the present embodiment, each of the second adsorbent layer 121b, the third adsorbent layer 121c, and the fourth adsorbent layer 121d may be accommodated in a closed space by the damper 122d. It is possible to make a plurality of adsorbent layers among these adsorbent layers simultaneously housed in a closed space.

In the suction device 12 of the present embodiment, the pipe P provided with the solenoid valve MV is connected to each of the flow paths in the second duct portion 122b.
That is, the adsorption device 12 of the present embodiment includes a plurality of adsorbent layers, and one adsorbent layer and the other adsorbent layer among the plurality of adsorbent layers can be accommodated in different closed spaces. It has a pipe P that is configured and has a flow path that communicates with each closed space.

As described above, in the carbon dioxide adsorption facility 1 of the present embodiment, the adsorption device 12 is provided with a plurality of the adsorbent layers 121, and the plurality of adsorbent layers include the first adsorbent layer 121a and the second adsorbent. Layer 121b and the like are included.
Moreover, in the suction device 12 of the present embodiment, the airflow F generated by the airflow generating unit 111 is divided into a plurality of parts, and one of the plurality of divided airflows (first airflow f1) is the first. It is configured to pass through the adsorbent layer 121a, and another airflow (second airflow f2) different from the one airflow passes through the second adsorbent layer 121b.
Therefore, in the adsorption device 12 of the present embodiment, a difference can be provided between the adsorption environment of the first adsorbent layer 121a and the adsorption environment of the second adsorbent layer 121b, and if necessary, the first adsorption. It is also possible to regenerate the adsorbent AD in the second adsorbent layer 121b while adsorbing carbon dioxide in the material layer 121a.

In the present embodiment, when the adsorbent AD is regenerated in the adsorbent layer 121, the adsorbent layer 121 to be regenerated is housed in the closed space by the damper 122d, and the closed space is decompressed. The pressure reducing pump 141 is provided so as to promote the release of carbon dioxide from the adsorbent AD.
The decompression pump 141 constitutes a transfer device 14 for transporting carbon dioxide released from the adsorbent AD to the carbon dioxide recovery device 13, and the closed space formed by the damper 122d is connected to the closed space. It is provided so that the gas inside can be discharged through the pipe P, and the carbon dioxide generated in the closed space can be conveyed to the carbon dioxide recovery device 13.

In the present embodiment, for example, carbon dioxide can be released from the adsorbent layer by heating the adsorbent layer after the carbon dioxide is sufficiently adsorbed on the adsorbent layer.
Therefore, in the present embodiment, the carbon dioxide adsorbed on the adsorbent layer can be recovered as a gas containing carbon dioxide at a high concentration (hereinafter, also referred to as “recovered gas”).
The recovered carbon dioxide may be recovered in a liquid state or a solid state in addition to the gaseous state.
For example, when the recovered carbon dioxide is used as calcium carbonate, the carbon dioxide recovery device 13 may be provided with, for example, an alkaline water tank (not shown) storing an aqueous solution of calcium hydroxide.
Then, if the recovered gas is dispersed in the calcium hydroxide aqueous solution stored in the alkaline water tank, the calcium carbonate will precipitate, so that the calcium carbonate can be recovered and used as it is.
The recovered carbon dioxide can be effectively utilized in industrial applications and the like.

When the adsorbent AD is heated and regenerated, hot water, steam, or superheated steam may be circulated through the heat exchanger 122e.
The heater for heating the adsorbent AD may be an electric heater provided separately from the heat exchanger 122e.
The carbon dioxide adsorption facility 1 in the present embodiment heats the adsorbent AD of the adsorbent layer housed in the closed space formed by the damper 122d, drives the decompression pump 141, and is connected to the closed space. By opening the solenoid valve MV provided in the pipe P, the release of carbon dioxide from the adsorbent AD can be promoted.
Regeneration by heating the adsorbent is performed by checking in advance the time required for carbon dioxide to be desorbed from the adsorbent when heated to a predetermined temperature, and controlling the heating time by timer control or the like. Can be done.

For the regeneration of the adsorbent AD, the electric energy obtained by the photovoltaic power generation device 15 can be utilized.
When the photovoltaic power generation device 15 has a photovoltaic power generation panel on which photoelectric conversion is performed, it is necessary to remove the photovoltaic power generation panel whose temperature rises due to solar radiation from the photovoltaic power generation panel in order to maintain an appropriate temperature. The adsorbent AD may be regenerated using thermal energy.
The thermal energy required for the regeneration of the adsorbent AD may be secured from the refrigerator 211, which is a cooling target to be cooled by the cold water obtained in the cooling tower 11.
The adsorbent AD in the present embodiment is a regenerative adsorbent that is regenerated by releasing carbon dioxide adsorbed by heating, and is cooled by the refrigerant as a heat source for regenerating the regenerative adsorbent. By utilizing the heat of the refrigerator, which is the object of cooling, it is possible to suppress the generation of extra energy consumption, and carbon dioxide in the atmosphere can be removed more efficiently.

Since the exhaust heat discharged from the equipment 2 in which the cooling tower 11 is installed may exist in addition to the exhaust heat discharged from the refrigerator 211, the heat energy required for the regeneration of the adsorbent AD is , It can be secured from other than the refrigerator.

In the carbon dioxide adsorption facility 1 of the present embodiment, the adsorbent layer 121 is arranged on the downstream side of the cooling unit 112 in the flow direction of the airflow F, and the adsorbent layer 121 and the cooling unit 112 A heat exchanger 122e that can be used as a cooler for cooling the airflow F is provided between them.
Therefore, in the carbon dioxide adsorption facility 1 of the present embodiment, the adsorption property of carbon dioxide in the adsorbent layer 121 can be improved as described above.
The electric energy obtained from the photovoltaic power generation device 15 can also be utilized for cooling by the heat exchanger 122e.

In the carbon dioxide adsorption facility 1 of the present embodiment, the adsorbent layer 121 is arranged on the downstream side of the cooling unit 112 in the flow direction of the air flow F, and the adsorbent layer 121 and the cooling unit 112 A duct for supplying the airflow F to the adsorbent layer 121 is provided between the ducts 122, and the duct 122 is provided with a diffuser 122c that attracts the air outside the duct into the duct.
Therefore, in the carbon dioxide adsorption facility 1 of the present embodiment, the temperature of the airflow passing through the adsorbent layer 121 can be lowered as described above, and the adsorption property of carbon dioxide in the adsorbent layer 121 can be improved. ..
Moreover, since the carbon dioxide adsorption facility 1 of the present embodiment has a damper 122c1 that opens and closes a flow path for attracting the atmosphere outside the duct into the duct, the atmosphere is attracted into the duct by the outside air temperature or the like. It is also possible to adjust the amount.

In the present embodiment, the adsorbent layer 121 is provided on the downstream side of the cooling unit 112 in the flow direction of the air flow, but the upstream side of the cooling unit 112 in order to allow the adsorbent layer 121 to pass the air flow as low as possible. The adsorbent layer 121 may be provided on the surface.
Further, in that case, it is preferable to adsorb carbon dioxide on the upstream side of the device such as a blower that generates heat.
That is, in the carbon dioxide adsorption facility 1 of the present embodiment, the airflow generating portion 111 is provided with a blower 111b for generating the airflow, and the adsorbent layer 121 is provided from the blower 111b in the flow direction of the airflow F. May be arranged on the upstream side, and the cooling unit 112 may be arranged on the downstream side of the adsorbent layer 121.

If the carbon dioxide adsorption performance of the adsorbent AD is improved when the humidity of the air is high, the adsorbent layer 121 may be arranged on the downstream side of the cooling unit 112, contrary to the above. preferable.
That is, the carbon dioxide adsorption facility 1 of the present embodiment further includes a sprinkling section 113 in which the cooling tower 11 sprinkles water, and in the cooling section 112, a part of the water sprinkled by the sprinkling section 113 is the airflow. It is as if the adsorbent layer 121 was arranged on the downstream side of the cooling unit 112 in the flow direction of the airflow F after being evaporated by F and the cooling was performed by the heat of vaporization in the evaporation. May be good.

In the present embodiment, the cooling tower 11 is a square type and a cross-flow type, but the cooling tower may be a counterflow type or a round type.
Further, in the present embodiment, the cooling tower 11 is an open type, but the cooling tower may be a closed type.
In the closed type, a sprinkling unit for sprinkling water on the pipe through which the hot water flows is provided, and the cooling unit evaporates the sprinkled water by an air flow to cool the hot water in the pipe. The point that the humidity of the airflow after passing through the cooling unit is improved, and the action exerted by the improvement are the same as those of the open type cooling tower illustrated in FIGS. 2 and 3.

In the present embodiment, a case where the cooling device cools the water heated by the refrigerator 211 in the cooling tower is illustrated by the cooling unit, but the cooling device is an outdoor heat exchanger in a heat pump type refrigeration cycle. Even if the refrigerant cooled by the cooling unit is an organic refrigerant, the same effect as in the above embodiment can be obtained.
In particular, when the outdoor heat exchanger is provided with a fin coil for cooling the organic refrigerant in the cooling section and has a sprinkling section for sprinkling pure water or the like on the fin coil, the cooling tower according to the present embodiment. The same action and effect can be expected.

In the present embodiment, the cooling target of the refrigerant cooled by the cooling device is the refrigerator 211, but in order to obtain the effects shown above, the same applies even if a cooling target other than the refrigerator is used.
Explaining this point, for example, in the case where a refrigerant is circulated and supplied to the photovoltaic power generation panel to prevent an excessive temperature rise due to sunlight, the refrigerant is cooled by a cooling tower or the like. At that time, the same effect as that of the above-exemplified embodiment can be obtained even if the airflow generated in the cooling tower is circulated through the adsorbent layer.

The adsorption device 12 illustrated in the present embodiment is provided with a plurality of the adsorbent layers 121 including the first adsorbent layer 121a and the second adsorbent layer 121b, and the adsorption device 12 is the airflow generating unit. The airflow F generated by 111 is divided into a plurality of airflows (f1, f2, f3, f4) including a first airflow f1 and a second airflow f2, and the first airflow f1 is the first adsorbent layer. It is configured to pass through 121a and the second airflow f2 to pass through the second adsorbent layer 121b.

Each of the plurality of adsorbent layers in the present embodiment is provided with a renewable adsorbent.
Therefore, in the adsorption device 12 of the present embodiment, not only the adsorption state of carbon dioxide in each adsorbent layer can be individually adjusted as described above, but also carbon dioxide in one adsorbent layer among the plurality of adsorbent layers. And the regeneration of the adsorbent in the other adsorbent layer (recovery of the adsorbed carbon dioxide) can be carried out in parallel.
Therefore, in the carbon dioxide adsorption facility 1 of the present embodiment, it is avoided that the adsorption of carbon dioxide in the atmosphere must be temporarily interrupted in order to regenerate the adsorbent layer having deteriorated adsorption performance. It is possible to continuously adsorb carbon dioxide over a long period of time.

The carbon dioxide adsorption facility may be as shown in FIG. 5 in order to exert the above functions.
The airflow generating unit 111'of the carbon dioxide adsorption facility 1'shown in FIG. 5 is provided with a plurality of blowers including a first blower 111b1 and a second blower 111b2 as blowers for generating the airflow, and the adsorption The device 12 includes a plurality of the adsorbent layers including the first adsorbent layer 121a'and the second adsorbent layer 121b', and the airflow f1'generated by the first blower 111b1 is the first adsorbent. The airflow f2'generated by the second blower 111b2 passes through the material layer 121a'and passes through the second adsorbent layer 121b'.

The carbon dioxide adsorption facility 1'shown in FIG. 5 is provided with a point where the airflow generating portion 111'is located above the cavity portion and a blower inside the nozzles (111a1, 111a2, 111a3, 111a4), respectively. In that respect, it is the same as the carbon dioxide adsorption facility 1 shown in FIGS. 2 and 3.
The carbon dioxide adsorption facility 1'shown in FIG. 5 is configured such that the airflow generating portion 111'can suck out the air in the cavity of the cooling tower 11'with the blower and move it upward. Is the same as the carbon dioxide adsorption facility 1 shown in FIGS. 2 and 3.

Similar to the cooling tower 11 shown in FIGS. 2 and 3, the cooling tower 11'shown in FIG. 5 also has a sprinkling unit for sprinkling the water to be cooled.
The cooling tower 11'is provided with a cooling unit 112'that cools the water by evaporating a part of the water sprinkled by the watering unit 113', and the cooling tower 11'has a tower center. A cavity portion V'is provided in the portion, and at least a part of the side wall portion W'surrounding the cavity portion V'is the cooling portion 112'and the cooling portion 112' has air permeability, and the airflow is generated. FIG. 2 shows that the unit 111'generates an air flow so that the air outside the tower that has flowed into the cavity V'through the cooling unit 112'is discharged from the cavity V'to the outside of the tower again. , The same as the cooling tower 11 shown in FIG.

It should be noted that the function of continuously adsorbing carbon dioxide over a long period of time is provided not only for the cooling tower 11'as shown in FIG. 5 but also for the outdoor heat exchanger in the heat pump type refrigeration cycle. It can also be exhibited when a blower is provided and the adsorption device is provided with a plurality of adsorbent layers.

The carbon dioxide adsorption facility of the present invention is not limited to the one shown in FIGS. 2 to 5, and may have, for example, a plurality of cooling devices as shown in FIG.
The carbon dioxide adsorption facility 1 "shown in FIG. 6 includes a plurality of the cooling devices including the first cooling device 11x" and the second cooling device 11y ", and the first cooling device 11x" cools the refrigerant. It is arranged so as to straddle both the first duct 122x "in which the airflow Fx generated in the above is circulated and the second duct 122y" in which the airflow Fy generated for cooling the refrigerant by the second cooling device 11y "is circulated. The adsorbent layer 121 ”is provided.

That is, the carbon dioxide adsorption facility 1 "shown in FIG. 6 is provided with a plurality of the cooling devices including the first cooling device 11x" and the second cooling device 11y ", and the adsorbent layer of the adsorption device 12". The 121 "is provided with a first adsorption region 121x" through which the airflow Fx by the first cooling device 11x "passes, and a second adsorption region 121y" through which the airflow Fy by the second cooling device 11y "passes. There is.

Even in such a case, the carbon dioxide adsorption equipment exemplified so far can be used in that the adsorbent can be regenerated in the first adsorption region 121x "and the carbon dioxide from the atmosphere can be adsorbed in the second adsorption region 121y". It is the same.

This point will be described with reference to FIG. 7.
In the carbon dioxide adsorption facility 1 "described in FIG. 6, the airflow Fx by the first cooling device 11x" circulates through the first duct 122x "and the airflow Fy by the second cooling device 11y" passes through the second duct 122y ". It is configured so that the first state of circulation and the second state in which the two airflows Fx and Fy merge and circulate in either the first duct 122x "or the second duct 122y" can be taken. There is.
The carbon dioxide adsorption facility 1 "described in FIG. 6 is configured so that the change between the first state and the second state can be performed by the damper 122d".

FIG. 7A shows a state in which carbon dioxide is adsorbed in both the first adsorption region 121x ”and the second adsorption region 121y” in the carbon dioxide adsorption facility 1 ”shown in FIG. 6 (first state). In FIG. 7B, the adsorbent AD "is regenerated in the first adsorption region 121x" in the carbon dioxide adsorption equipment 1 "shown in FIG. 6, and the first in the second adsorption region 121y". It shows a state (second state) in which the airflow Fx from the cooling device 11x "and the airflow Fy from the second cooling device 11y" are merged and carbon dioxide is adsorbed using both airflows. ..

The carbon dioxide adsorption facility 1 "shown in FIG. 6 is also openable and closable on the downstream side with the first damper 122d1" provided on the upstream side of the adsorbent layer 121 "as shown in FIG. It is equipped with two dampers 122d "with a second damper 122d2" provided.
Therefore, even in the carbon dioxide adsorption facility 1 "shown in FIG. 6, if the first adsorption region 121x" is accommodated in the closed space by the damper 122d ", the heat exchanger 122e is used to accommodate the first adsorption region 121x". The closed space can be depressurized by using the decompression pump 141 "while heating the adsorbent AD" provided in the above, and the carbon dioxide discharged from the closed space is conveyed to the carbon dioxide recovery device 13 ". be able to.

The carbon dioxide adsorption facility 1 "shown in FIG. 6 is changed to the one shown in FIG. 8, for example, so that the first cooling device can regenerate the adsorbent AD" in the first adsorption region 121x ". It is possible to avoid circulating both the airflow Fx from the 11x "and the airflow Fy from the second cooling device 11y" to only one duct (second adsorption region 121y ").

The carbon dioxide adsorption facility 1a "exemplified in FIG. 8 is provided with a plurality of the cooling devices including the first cooling device 11x" and the second cooling device 11y ", and the adsorbent layer 121" of the adsorption device 12 ". Is provided with a first adsorption region 121x "through which the airflow Fx by the first cooling device 11x" passes, and a second adsorption region 121y "through which the airflow Fy by the second cooling device 11y" passes. Is common to the carbon dioxide adsorption facility 1 "exemplified in FIG.
In the carbon dioxide adsorption facility 1a "exemplified in FIG. 8, the airflow Fx by the first cooling device 11x" circulates through the first duct 122x "and the airflow Fy by the second cooling device 11y" passes through the second duct 122y ". It is also in common with the carbon dioxide adsorption facility 1 "exemplified in FIG. 6 in terms of distribution.

The carbon dioxide adsorption facility 1a "exemplified in FIG. 8 is for dividing the flow path of the atmosphere after passing through the adsorbent layer 121" into a plurality of each of the first duct 122x "and the second duct 122y". It differs from the carbon dioxide adsorption facility 1 "exemplified in FIG. 6 in that it has a partition wall 122b1".
In the carbon dioxide adsorption facility 1a "exemplified in FIG. 8, the first duct 122x" is formed with the first flow path Cx1 "and the second flow path Cx2" by the partition wall 122b1 ", and the second duct 122y" is the first. One flow path Cy1 "and second flow path Cy2" are formed.
The first adsorption region 121x "of the adsorbent layer 121" is arranged in the first flow path Cx1 "of the first duct 122x", and the adsorption is performed in the first flow path Cy1 "of the second duct 122y". The second adsorption region 121y "of the material layer 121" is arranged.
On the other hand, different adsorbent layers 1211 "and 1212" are arranged in the second flow path Cx2 "of the first duct 122x" and the second flow path Cy2 "of the second duct 122y", respectively.

The carbon dioxide adsorption facility 1a "exemplified in FIG. 8 is provided with a plurality of the cooling devices including the first cooling device 11x" and the second cooling device 11y "as described above, and the adsorption of the adsorption device 12". The material layer 121 "provides a first adsorption region 121x" through which the airflow Fx by the first cooling device 11x "passes, and a second adsorption region 121y" through which the airflow Fy by the second cooling device 11y "passes. The airflow from the first cooling device 11x "is divided into a first airflow Fx1 that passes through the first adsorption region 121x" and a second airflow Fx2 that does not pass through the first adsorption region 121x ". The airflow from the cooling device 11y "is divided into a first airflow Fy1 that passes through the second adsorption region 121y" and a second airflow Fy2 that does not pass through the second adsorption region 121y ".

In the carbon dioxide adsorption facility 1a "exemplified in FIG. 8, a plurality of the airflows generated by the airflow generating portions of the first cooling device 11x" and the second cooling device 11y "including the first airflow and the second airflow. It is common with the carbon dioxide adsorption facility 1 illustrated in FIG. 2 in that it is divided into the airflows of the above and the divided airflows pass through different adsorbent layers.
Therefore, the carbon dioxide adsorption facility 1a "exemplified in FIG. 8 can be regenerated in the adsorbent layer in the same manner as the carbon dioxide adsorption facility 1 illustrated in FIG.
Specifically, when the adsorbent is regenerated in the first adsorption region 121x "in the carbon dioxide adsorption facility 1a" illustrated in FIG. 8, only the first air flow Fx1 is stopped and the first cooling device is used. The entire amount of the airflow Fx generated from 11x "can be circulated as a second airflow Fx2 to another adsorbent layer 1211" which is not regenerated.
Further, in the carbon dioxide adsorption facility 1a "exemplified in FIG. 8, when the carbon dioxide adsorption facility 1a" is regenerated by another adsorbent layer 1211 ", the second airflow Fx2 is similarly stopped and the airflow generated from the first cooling device 11x". The total amount of Fx can be the first airflow Fx1.
This point is the same on the side of the second cooling device 11y ”.

In the above, the adsorbent layer is housed in a closed space to reduce the pressure of the closed space and is provided in the adsorbent layer in that the adsorbent can be efficiently regenerated and carbon dioxide can be efficiently recovered. Although the adsorbent is regenerated by heating the adsorbent, it is not always necessary to form a reduced pressure environment for the regeneration of the adsorbent.
For example, in a carbon dioxide adsorbing facility provided with a plurality of adsorbent layers, the adsorbent is regenerated in one adsorbent layer and carbon dioxide is adsorbed in another adsorbent layer, and then regenerated by the damper. The amount of airflow passing through the one adsorbent layer (surface wind velocity) is reduced from the amount of airflow passing through the other adsorbent layer (surface wind velocity), and the carbon dioxide concentration in the atmosphere that has passed through the one adsorbent layer is reduced. The atmosphere after passing through the one adsorbent layer may be transported to the carbon dioxide recovery device as a recovery gas, which is higher than that before the passage.
In this case, the degree of regeneration can be grasped by providing a carbon dioxide concentration meter for measuring the carbon dioxide concentration in the atmosphere after passing through the one adsorbent layer.

In the above description, an embodiment in which the adsorbent is regenerated with the adsorbent layer installed in the carbon dioxide adsorption facility is illustrated, but for example, the nozzle of the cooling tower is simply provided without a duct or the like. An adsorbent layer is provided on the adsorbent layer in a detachable state, and after a sufficient amount of carbon dioxide is adsorbed by the adsorbent layer, the adsorbent layer is removed to install a new adsorbent layer and the removed adsorption Carbon dioxide may be recovered from the material layer.
As described above, the present invention is not limited to the above examples, and various modifications can be made to the above examples.

1,1', 1 ": Carbon dioxide adsorption equipment, 2: Equipment, 11,11': Cooling tower, 12,12": Adsorption equipment, 13: Carbon dioxide recovery equipment, 14: Conveyor equipment, 15: Solar power generation Equipment, 21: Air conditioner, 111, 111': Air flow generator, 111a: Nozzle, 111b: Blower, 112: Cooling unit, 113, 113': Sprinkler, 113a: Hot water pit, 115a: Cold water pit, 121: Adsorption Material layer, 122: Duct, 122c: Diffuser, 122d: Damper, 122e: Heat exchanger, 211: Refrigerator, AD: Adsorbent, F: Airflow, V: Cavity, W: Side wall, X: Facility

Claims (11)

It is equipped with a cooling device that cools the heated refrigerant in the atmosphere and an adsorption device for adsorbing carbon dioxide in the atmosphere.
The cooling device includes an air flow generating unit for generating an air flow by the atmosphere and a cooling unit for cooling the refrigerant with the air flow generated by the air flow generating unit.
The adsorbing device includes a breathable adsorbent layer, and the adsorbent layer is provided with an adsorbent capable of adsorbing carbon dioxide, and the adsorbing device allows the air flow to pass through the adsorbent layer. Carbon dioxide adsorption equipment arranged in the same way. The carbon dioxide adsorption facility according to claim 1, wherein the refrigerant is water, and the cooling device is an open type or closed type cooling tower that cools the water with the air flow. The carbon dioxide adsorption facility according to claim 1, wherein the refrigerant is an organic refrigerant used in a heat pump type refrigeration cycle, and the cooling device is an outdoor heat exchanger in the heat pump type refrigeration cycle. The airflow generating unit is provided with a blower for generating the airflow.
Any one of claims 1 to 3 in which the adsorbent layer is arranged on the upstream side of the blower and the cooling unit is arranged on the downstream side of the adsorbent layer in the flow direction of the air flow. The carbon dioxide adsorption equipment described in the section. The cooling device further includes a sprinkler for sprinkling water.
In the cooling section, a part of the water sprinkled in the sprinkling section is evaporated by the air flow, and the cooling is performed by the heat of vaporization in the evaporation.
The carbon dioxide adsorption facility according to any one of claims 1 to 3, wherein the adsorbent layer is arranged on the downstream side of the cooling unit in the flow direction of the air flow. The adsorption device is provided with a plurality of the adsorbent layers including a first adsorbent layer and a second adsorbent layer.
In the adsorption device, the airflow generated by the airflow generating portion is divided into a plurality of airflows including a first airflow and a second airflow, and the first airflow passes through the first adsorbent layer, and the above-mentioned The carbon dioxide adsorption facility according to any one of claims 1 to 5, wherein the second air flow is configured to pass through the second adsorbent layer. The airflow generating unit is provided with a plurality of blowers including a first blower and a second blower as blowers for generating the airflow.
The adsorption device includes a plurality of the adsorbent layers including a first adsorbent layer and a second adsorbent layer, and the airflow generated by the first blower passes through the first adsorbent layer. The carbon dioxide adsorption facility according to any one of claims 1 to 5, wherein the airflow generated by the second blower passes through the second adsorbent layer. A plurality of said cooling devices including a first cooling device and a second cooling device are provided.
1. The adsorbent layer of the adsorbent is provided with a first adsorption region through which the airflow by the first cooling device passes and a second adsorption region through which the airflow by the second cooling device passes. The carbon dioxide adsorption facility according to any one of 5 to 5. In the flow direction of the air flow, the adsorbent layer is arranged on the downstream side of the cooling unit, and a duct for supplying the air flow to the adsorbent layer between the adsorbent layer and the cooling unit. Is provided,
The carbon dioxide adsorption facility according to any one of claims 1 to 3, wherein the duct is provided with a diffuser that attracts the air outside the duct into the duct. In the flow direction of the air flow, the adsorbent layer is arranged on the downstream side of the cooling unit, and a cooler for cooling the air flow is provided between the adsorbent layer and the cooling unit. The carbon dioxide adsorption facility according to any one of claims 1 to 3. The adsorbent is a regenerative adsorbent that is regenerated by releasing carbon dioxide adsorbed by heating, and is cooled by the refrigerant as a heat source for regenerating the regenerative adsorbent. The carbon dioxide adsorption facility according to any one of claims 1 to 10, wherein the carbon dioxide adsorption facility is used.