NL2021510A - Carbon dioxide application device and method for capturing carbon dioxide contained in a combustion exhaust gas - Google Patents

Carbon dioxide application device and method for capturing carbon dioxide contained in a combustion exhaust gas Download PDF

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Publication number
NL2021510A
NL2021510A NL2021510A NL2021510A NL2021510A NL 2021510 A NL2021510 A NL 2021510A NL 2021510 A NL2021510 A NL 2021510A NL 2021510 A NL2021510 A NL 2021510A NL 2021510 A NL2021510 A NL 2021510A
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carbon dioxide
exhaust gas
combustion exhaust
liquid
storage tank
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NL2021510A
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Dutch (nl)
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NL2021510B1 (en
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Saito Takashi
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Futaba Ind Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/62—Carbon oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/02—Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/0407—Constructional details of adsorbing systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B01D2253/108—Zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/151—Reduction of greenhouse gas [GHG] emissions, e.g. CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Treating Waste Gases (AREA)
  • Cultivation Of Plants (AREA)
  • Greenhouses (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

A carbon dioxide application device according to one aspect of the present disclosure includes at least one liquid storage tank, an adsorption tank, a supply flow path, and a discharge flow path. The adsorption tank is disposed in a position where a temperature of the adsorption tank becomes higher than a temperature of the at least one liquid storage tank.

Description

CARBON DIOXIDE APPLICATION DEVICE AND METHOD FOR CAPTURING
CARBON DIOXIDE CONTAINED IN A COMBUSTION EXHAUST GAS
BACKGROUND
[0001] The present disclosure relates to a technology for capturing carbon dioxide contained in a combustion exhaust gas and supplying carbon dioxide into an agriculture greenhouse.
[0002] Japanese Unexamined Patent Application Publication No. 2016-063755 discloses a technology wherein a combustion exhaust gas is dehumidified in the upstream side of an adsorption tank in the flow of the combustion exhaust gas. The adsorption tank has an adsorbent that adsorbs carbon dioxide. Due to the dehumidified combustion exhaust gas, adsorbing water by the adsorbent is inhibited. Thus, the adsorption tank can effectively store carbon dioxide.
SUMMARY
[0003] When the adsorption tank is cooled, the adsorption tank undergoes condensation, and water produced by the condensation is adsorbed by the adsorbent. As a result, the efficiency in adsorbing carbon dioxide in the adsorption tank may be decreased.
[0004] It is desirable that one aspect of the present disclosure can inhibit an adsorption tank from undergoing condensation in a carbon dioxide application device that captures and supplies carbon dioxide.
[0005] A carbon dioxide application device according to one aspect of the present disclosure comprises at least one liquid storage tank, an adsorption tank, a supply flow path, and a discharge flow path.
[0006] The at least one liquid storage tank is configured to store a liquid.
The at least one liquid storage tank is further configured to receive a combustion exhaust gas so as to allow a passage of the combustion exhaust gas through the liquid. The adsorption tank comprises an adsorbent configured to adsorb carbon dioxide. The adsorption tank is configured to adsorb, by the adsorbent, carbon dioxide in the combustion exhaust gas that has passed through the liquid. The adsorption tank is disposed in a position where a temperature of the adsorption tank becomes higher than a temperature of the at least one liquid storage tank. The supply flow path is configured to supply the combustion exhaust gas to the adsorption tank through the at least one liquid storage tank. The discharge flow path couples the adsorption tank and an agriculture greenhouse.
[0007] That is, in the carbon dioxide application device according to the present disclosure, the adsorption tank is disposed in a position where the temperature of the adsorption tank becomes higher than that of the at least one liquid storage tank. This configuration can inhibit a decrease in the temperature of the combustion exhaust gas in the adsorption tank that has passed through the at least one liquid storage tank, and can limit an increase in the relative humidity of the combustion exhaust gas. Accordingly, the adsorption tank can be inhibited from undergoing condensation, and the adsorption performance of the adsorption tank to adsorb carbon dioxide can be maintained.
[0008] If the temperature of the combustion exhaust gas that has passed through the at least one liquid storage tank can be increased by this configuration, the relative humidity of the combustion exhaust gas can be decreased.
The adsorption tank may be disposed in the agriculture greenhouse. The at least one liquid storage tank may be disposed in an exterior of the agriculture greenhouse.
[0009] In this case, the adsorption tank is disposed in the interior of the agriculture greenhouse where the temperature becomes relatively high in winter because of the combustion exhaust gas supplied by a heating operation, while the at least one liquid storage tank is disposed in the exterior of the agriculture greenhouse where the temperature becomes relatively low.
Accordingly, the adsorption tank can be inhibited from undergoing condensation.
[0010] The above-described carbon dioxide application device may further comprise a heater configured to beat the adsorption tank.
In this case, the adsorption tank can be heated by the heater so as to further increase the temperature of the adsorption tank. Accordingly, the adsorption tank can be further inhibited from undergoing condensation.
[0011] The heater may be configured to produce the combustion exhaust gas containing carbon dioxide by burning a fuel, to supply at least a portion of the combustion exhaust gas to the supply flow path, and to use at least a portion of heat produced by the burning so as to heat the adsorption tank.
[0012] In this case, the heater has a function to supply carbon dioxide produced by combustion to the adsorption tank, and a function to heat the adsorption tank with heat produced by combustion. Accordingly, the size of the carbon dioxide application device can be reduced as compared with a configuration wherein these functions are achieved by separate devices.
The liquid may include a toxic-substance removing liquid that is removable of a toxic substance contained in the combustion exhaust gas.
The toxic-substance removing liquid may include an aqueous solution of a compound that reacts to sulfide and/or nitride.
[0013] Another aspect of the present disclosure provides a method for capturing carbon dioxide contained in a combustion exhaust gas. The method comprises storing a liquid in at least one liquid storage tank, and supplying the combustion exhaust gas to an adsorption tank through the at least one liquid storage tank. The adsorption tank is disposed in a position where a temperature of the adsorption tank becomes higher than a temperature of the at least one liquid storage tank. The adsorption tank is configured to adsorb carbon dioxide in the combustion exhaust gas that has passed through the liquid.
Such method can inhibit the adsorption tank from undergoing condensation, and maintain the adsorption performance of the adsorption tank to adsorb carbon dioxide.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] An example embodiment of the present disclosure will be described hereinafter with reference to the accompanying drawings, in which: FIG. 1 is a block diagram schematically showing a configuration of a carbon dioxide application device according to an embodiment; FIG. 2 is a plan view showing an example of a layout of components of the carbon dioxide application device according to the embodiment; FIG. 3 is a plan view showing an example of a layout of components of a carbon dioxide application device according to a first comparative example; FIG. 4 is a plan view showing an example of a layout of components of a carbon dioxide application device according to a second comparative example; FIG. 5 is a graph showing a water content in an adsorption tank in an experimental example; FIG. 6 is a block diagram schematically showing a configuration of a carbon dioxide application device according to another embodiment; and FIG. 7 is a block diagram schematically showing a configuration of a carbon dioxide application device according to a further embodiment.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0015] [1. First Embodiment] [1-1. Configuration] A carbon dioxide application device 1 shown in FIG. 1 is configured to capture carbon dioxide contained in a combustion exhaust gas, and supply carbon dioxide into an agriculture greenhouse. As it will be described below, components of the carbon dioxide application device 1 are distributed and disposed in the interior and the exterior of the agriculture greenhouse.
[0016] The carbon dioxide application device 1 comprises a combustion device 2, a purifier 20, a blower 5, an adsorption tank 6, and a controller 7. The purifier 20 comprises a first liquid storage tank 3, a second liquid storage tank 4, and an adjustment valve 8. The purifier 20 may comprise the blower 5 and/or the controller 7.
[0017] The carbon dioxide application device 1 further comprises an exhaust gas flow path 10, a first receiving path 11, a cooling-air flow path 12, a second receiving path 13, a feed-air flow path 14, a supply flow path 15, and a discharge flow path 16. Each of the first receiving path 11, the second receiving path 13, and the supply flow path 15 is formed in a tubular manner, and serves as a path through which the combustion exhaust gas is supplied to the adsorption tank 6 via the first liquid storage tank 3 and the second liquid storage tank 4.
[0018] <Combustion Device>
The combustion device 2 is configured to burn a fuel, such as heavy oil, kerosene, and so on, mainly during night-time so as to warm up the air in the agriculture greenhouse. The combustion exhaust gas is discharged to the exterior of the agriculture greenhouse through the exhaust gas flow path 10, which is a smokestack.
[0019] The combustion device 2 is configured to supply at least a portion of the combustion exhaust gas to the first receiving path 11, the second receiving path 13, and the supply flow path 15. The combustion device 2 is also configured to use at least a portion of the heat generated by the combustion so as to heat the adsorption tank 6.
[0020] In the present embodiment, the combustion device 2 heats the interior of the agriculture greenhouse so as to heat up the adsorption tank 6 disposed in the agriculture greenhouse through the air in the agriculture greenhouse. The exhaust gas flow path 10 may be disposed closer to the adsorption tank 6 so as to heat up the adsorption tank 6 with the heat of the exhaust gas flow path 10.
[0021] <First Liquid Storage Tank>
The first liquid storage tank 3 is configured to allow a portion of the produced combustion exhaust gas from the combustion device 2 to pass through a first liquid LI so as to cool and purify the portion of the combustion exhaust gas by the first liquid LI.
[0022] The first liquid storage tank 3 stores the first liquid LI in the first liquid storage tank 3. The first liquid storage tank 3 is configured to receive the combustion exhaust gas from the combustion device 2 such that the received combustion exhaust gas goes through the first liquid LI. The combustion exhaust gas is cooled by a heat exchange with the first liquid LI. A portion of the components contained in the combustion exhaust gas is removed by a compound contained in the first liquid LI.
[0023] Specifically, the first liquid storage tank 3 is coupled to the first receiving path 11, and the combustion exhaust gas is supplied from the first receiving path 11 into the first liquid LI in the first liquid storage tank 3. The first receiving path 11 is coupled to the exhaust gas flow path 10, and the combustion exhaust gas is introduced through the exhaust gas flow path 10. The first liquid LI fills the first receiving path 11 up to the same level as the level of the liquid surface of the first liquid LI in the first liquid storage tank 3.
[0024] FIG. 1 shows a first end of the first receiving path 11 being coupled to the bottom surface of the first liquid storage tank 3. Alternatively, the first end may be coupled to the lateral surface of the first liquid storage tank 3. Or, the first receiving path 11 may be disposed such that the first receiving path 11 passes through the interior of the first liquid storage tank 3 from the top surface of the first liquid storage tank 3, and is open in the first liquid LI. The same applies to the second receiving path 13 of the second liquid storage tank 4, which will be described below.
[0025] The combustion exhaust gas supplied into the first liquid LI floats in the first liquid LI in the first liquid storage tank 3 in the form of air bubbles.
In other words, bubbling takes place in the first liquid storage tank 3. The combustion exhaust gas that has passed through the first liquid LI is introduced into the second liquid storage tank 4 through the second receiving path 13.
[0026] The first liquid LI stored in the first liquid storage tank 3 is preferably a liquid that can remove a toxic substance/toxic substances, such as sulfide and nitride, contained in the combustion exhaust gas. For example, an aqueous solution of a compound that reacts to sulfide and/or nitride can be preferably used as the first liquid LI.
[0027] The first liquid storage tank 3 is provided with a drain path 17. The drain path 17 is a flow path configured to drain the first liquid LI to the exterior of the first liquid storage tank 3 by the liquid pressure of the first liquid LI, when the liquid level of the first liquid LI is increased, so as to maintain the liquid level of the first liquid LI at a constant level.
[0028] In the present embodiment, the drain path 17 is provided with a check valve (in other words, a non-return valve) 17A. The drain path 17 does not have to be provided with the check valve 17A. Instead of the check valve 17A, or in addition to the check valve 17A, any configuration that can discharge the first liquid LI in response to an increase in the liquid level of the first liquid LI may be provided to the drain path 17.
[0029] The first liquid storage tank 3 is coupled to the cooling-air flow path 12 that cools the first liquid LI. The cooling-air flow path 12 cools the first liquid LI by supplying a cooling air into the first liquid LI. The cooling-air flow path 12 comprises a cooling pipe 12A and a first switching valve 12B.
[0030] A first end of the cooling pipe 12A is disposed in the first liquid LI in the first liquid storage tank 3. A second end of the cooling pipe 12A is coupled to the supply source of the cooling air (not shown).
The first switching valve 12B is installed in the cooling pipe 12A. The first switching valve 12B is opened when the cooling air is supplied through the cooling pipe 12A. The first switching valve 12B may be implemented, for example, by a solenoid valve.
[0031] The cooling air supplied into the first liquid LI in the first liquid storage tank 3 is supplied through the second receiving path 13 into a second liquid L2 in the second liquid storage tank 4. In other words, the cooling air supplied from the cooling-air flow path 12 cools the first liquid L I in the first liquid storage tank 3 and the second liquid L2 in the second liquid storage tank 4.
[0032] <Second Liquid Storage Tank>
The second liquid storage tank 4 is configured to once again cool and purify the combustion exhaust gas that has passed through the first liquid storage tank 3. In other words, the carbon dioxide application device 1 is configured to cool and purify the combustion exhaust gas in two steps.
[0033] The second liquid storage tank 4 stores the second liquid L2 in the second liquid storage tank 4. The second liquid L2 in the present embodiment is the same liquid as the first liquid LI. In other embodiments, the second liquid L2 may be a different liquid from the first liquid LI. The second liquid storage tank 4 is configured to receive the combustion exhaust gas that has passed through the first liquid storage tank 3 such that the received combustion exhaust gas goes through the second liquid L2.
[0034] Specifically, the second liquid storage tank 4 is coupled to the second receiving path 13, and the combustion exhaust gas is supplied from the second receiving path 13 into the second liquid L2. The combustion exhaust gas that has passed through the second liquid L2 is supplied through the supply flow path 15 to the adsorption tank 6. The second liquid storage tank 4 is provided with the drain path 17 that is similar to the drain path 17 of the first liquid storage tank 3. The second liquid L2 fills the second receiving path 13 up to the same level as the level of the liquid surface of the second liquid L2 in the second liquid storage tank 4.
[0035] The supply flow path 15 comprises a first supply pipe 15A and a second supply pipe 15B. A first end of the first supply pipe 15A is positioned in a space above the liquid surface in the second liquid storage tank 4. A second end of the first supply pipe 15A is coupled to the second supply pipe 15B and a feeding pipe 14A which will be described below.
[0036] <Blower>
The blower 5 is configured to supply the combustion exhaust gas to the adsorption tank 6. The blower 5 is provided to the second supply pipe 15B of the supply flow path 15.
[0037] In a carbon dioxide adsorption process, the interior of the first liquid storage tank 3 and of the second liquid storage tank 4 are negatively pressurized (vacuumed) in response to the operation of the blower 5, the combustion exhaust gas produced in the combustion device 2 is compressed and transferred to the adsorption tank 6 through the first liquid storage tank 3 and the second liquid storage tank 4.
[0038] <Adsorption Tank>
The adsorption tank 6 comprises, in the adsorption tank 6, an adsorbent 6A that adsorbs carbon dioxide in the combustion exhaust gas. In the carbon dioxide adsorption process, carbon dioxide in the combustion exhaust gas supplied by the blower 5 is adsorbed by the adsorbent 6A. The adsorbent 6A may be implemented, for example, by a porous material such as activated carbon, zeolite, and so on.
[0039] In a carbon dioxide feeding process, a feed air is supplied from the feed-air flow path 14 into the adsorption tank 6, and carbon dioxide is desorbed from the adsorbent 6A. The desorbed carbon dioxide is fed into the agriculture greenhouse through the discharge flow path 16.
[0040] In the present embodiment, the feed-air flow path 14 is coupled to the supply flow path 15. Specifically, the second supply pipe 15B is common to the feed-air flow path 14 and the supply flow path 15. The feed-air flow path 14 comprises the feeding pipe 14A and a second switching valve 14B.
[0041] A first end of the feeding pipe 14A is coupled to the second supply pipe 15B. A second end of the feeding pipe 14A is open to the atmosphere. The second switching valve 14B is installed in the feeding pipe 14A. The second switching valve 14B is opened when the feed air is supplied through the feeding pipe 14A. The second switching valve 14B may be implemented, for example, by a solenoid valve. The pressure of the inflow of the feed air from the feeding pipe 14A is smaller than the pressure that depresses the liquid surface of the second liquid L2 in the second liquid storage tank 4. Accordingly, the feed air is introduced into the supply flow path 15.
[0042] <Controller>
The controller 7 is configured to control the operation of the carbon dioxide application device 1. Specifically, the controller 7 is configured to control, for example, the blower 5 to operate and to stop, and control the first switching valve 12B and the second switching valve 14B to be open and closed.
[0043] <Adjustment Mechanism>
In the present embodiment, the carbon dioxide application device 1 comprises the adjustment valve 8. The adjustment valve 8 is an adjustment mechanism configured to adjust the pressure in the first liquid storage tank 3 and the second liquid storage tank 4.
[0044] The adjustment valve 8 is configured to block the flow of the gas from the adsorption tank 6 into the second liquid storage tank 4 after the operation of the blower 5 is stopped. The adjustment valve 8 configured as described above can inhibit the pressure in the first liquid storage tank 3 and the second liquid storage tank 4 from being increased after the operation of the blower 5 is stopped.
[0045] The adjustment valve 8 is disposed in the upstream side of the adsorption tank 6 in the supply flow path 15 in the direction of the flow of the combustion exhaust gas. In the present embodiment, the adjustment valve 8 is disposed in the upstream side of the blower 5 in the supply flow path 15.
[0046] The adjustment valve 8 may be implemented, for example, by a check valve. Alternatively, a gate valve, a globe valve, and/or a ball valve may be used as the adjustment valve 8. In this case, the carbon dioxide application device 1 may be configured such that the adjustment valve 8 is held open during the carbon dioxide adsorption process, and the adjustment valve 8 is closed manually or by the controller 7 after the operation of the blower 5 is stopped. The adjustment valve 8, which is implemented by the check valve, can simplify the configuration of the adjustment mechanism, and thus can reduce the cost required to implement the carbon dioxide application device 1.
[0047] [1-2. Layout]
As shown in LIG. 2, the combustion device 2 and the adsorption tank 6 of the carbon dioxide application device 1 are disposed in the interior 100A of the agriculture greenhouse 100, while the purifier 20 is disposed in the exterior 100B of the agriculture greenhouse 100. The components included in the carbon dioxide application device 1 other than the combustion device 2, the adsorption tank 6, and the purifier 20 may be disposed in any positions in the interior 100A or the exterior 100B of the agriculture greenhouse 100. The adsorption tank 6 is disposed in a position where the temperature of the adsorption tank 6 becomes higher than that of the purifier 20.
[0048] [1-3. Experimental Example]
The inventor ran an experiment to prove the superiority of the carbon dioxide application device 1 according to the aforementioned embodiment. FIG. 3 shows the configuration of a first comparative example 1Y of a carbon dioxide application device. FIG. 4 shows the configuration of a second comparative example 1Z of a carbon dioxide application device.
[0049] In the present experimental example, the amount of water adsorbed in the adsorbent 6A, that is, the water content, was measured, instead of directly measuring the amount of carbon dioxide adsorbed in the adsorbent 6A. The reason is that, as the adsorbent 6A adsorbs water, the amount of carbon dioxide that can be adsorbed in the adsorbent 6A decreases. In other words, if the adsorbent 6A adsorbs less water, the adsorbent 6A can adsorb more carbon dioxide.
[0050] In the first comparative example 1Y, all of the combustion device 2, the purifier 20, and the adsorption tank 6 are disposed in the interior 100A of the agriculture greenhouse 100. In the second comparative example 1Z, the combustion device 2 is disposed in the interior 100A of the agriculture greenhouse 100, while the purifier 20 and the adsorption tank 6 are disposed in the exterior 100B of the agriculture greenhouse 100.
[0051] FIG. 5 shows the change in the water content in the adsorption tank 6 when carbon dioxide is adsorbed in the adsorption tank 6 and when carbon dioxide is fed from the adsorption tank 6 with regard to each of the carbon dioxide application device 1, the first comparative example 1Y, and the second comparative example 1Z.
[0052] For all the carbon dioxide application devices 1, the first comparative example 1Y, and the second comparative example 1Z, the following conditions were set. When adsorption is performed, the temperature in the interior 100A of the agriculture greenhouse 100 was set to 15°C, while the temperature in the exterior 100B of the agriculture greenhouse 100 was set to 5°C. When feeding is performed, the temperature in the interior 100A of the agriculture greenhouse 100 was set to 25°C, and the relative humidity was set to 50%, while the temperature in the exterior 100B of the agriculture greenhouse 100 was set to 10°C, and the relative humidity was set to 30%.
[0053] In the present experimental example, the adsorbents 6A that have generally the same initial water content were used. In the first approximately 60 minutes, the fuel was burned by the combustion devices 2 under the identical conditions so as to perform adsorption of carbon dioxide by the adsorbents 6A. Subsequently, the operation of the combustion devices 2 was stopped, the conditions, such as the temperatures, were changed, and the carbon dioxide was fed from the adsorbent 6A over 300 minutes.
[0054] As FIG. 5 shows, the water content increased during the adsorption of carbon dioxide by about 0.3 to 0.4 kg in the first comparative example 1Y and the second comparative example 1Z, while the water content increased only by about 0.05 kg in the carbon dioxide application device 1 according to the present embodiment. In other words, FIG. 5 indicates that the carbon dioxide application device 1 according to the present embodiment can limit the increase in the water content to approximately 1/6 to 1/8, and thus can adsorb more carbon dioxide.
[0055] [1-2. Effects]
According to the embodiment described above in detail, the following effects can be achieved.
[0056] In the carbon dioxide application device 1 according to the present embodiment, the first liquid storage tank 3 and the second liquid storage tank 4 are disposed in a place where the ambient temperature is relatively low, and thus the temperature of the first liquid LI and the temperature of the second liquid L2 are maintained relatively low. Accordingly, by passing through the first liquid LI and the second liquid L2, the combustion exhaust gas is cooled down to a temperature lower than the ambient temperature of the adsorption tank 6, or to approximately the same temperature as the ambient temperature of the adsorption tank 6.
[0057] This mechanism inhibits a decrease in the temperature of the combustion exhaust gas in the adsorption tank 6 that has passed through the first liquid storage tank 3 and the second liquid storage tank 4, and limits an increase in the relative humidity of the combustion exhaust gas. Accordingly, the adsorption tank 6 can be inhibited from undergoing condensation, and the adsorption performance of the adsorption tank 6 to adsorb carbon dioxide can be maintained.
[0058] If the temperature of the combustion exhaust gas that has passed through the first liquid storage tank 3 and the second liquid storage tank 4 can be increased by the above-described configuration, the relative humidity of the combustion exhaust gas can be decreased.
[0059] In the carbon dioxide application device 1 as described above, the adsorption tank 6 is disposed in the interior 100A of the agriculture greenhouse 100 where the temperature becomes relatively high in winter because of the combustion exhaust gas supplied by a heating operation, while the first liquid storage tank 3 and the second liquid storage tank 4 are disposed in the exterior 100B of the agriculture greenhouse 100 where the temperature becomes relatively low. Accordingly, the adsorption tank 6 can be inhibited from undergoing condensation.
[0060] In the carbon dioxide application device 1 as described above, the adsorption tank 6 can be heated by the combustion device 2 so as to further increase the temperature of the adsorption tank 6. Accordingly, the adsorption tank 6 can be further inhibited from undergoing condensation.
[0061] In the carbon dioxide application device 1 as described above, the combustion device 2 can exhibit a function to supply carbon dioxide produced by combustion to the adsorption tank 6, and a function to heat the adsorption tank 6 with heat produced by combustion. Accordingly, the size of the carbon dioxide application device 1 can be reduced as compared with a configuration wherein these functions are achieved by separate devices.
[0062] [2. Other Embodiments]
Although the embodiment of the present disclosure has been described above, the present disclosure is not limited to the aforementioned embodiment, but may be embodied in various forms.
[0063] For example, the combustion device 2 may be disposed in the exterior 100B of the agriculture greenhouse 100.
The first liquid storage tank 3 or the second liquid storage tank 4 may be omitted, or at least one additional liquid storage tank may be provided.
[0064] The controller 7 may control the degree of openness of an switching valve (not shown) in the discharge flow path 16 in addition to controlling the rotational frequency of the blower 5. In other words, the controller 7 may control the switching valve so as to gradually open the switching valve so that the pressure in the downstream side of the blower 5 is always larger than the pressure in the adsorption tank 6.
[0065] As shown in FIG. 6, the carbon dioxide application device 1 may further comprises, separately from the combustion device 2, a heater 18 configured to heat the adsorption tank 6. The heater 18 may be implemented, for example, by a known heater with a heating wire system, or by a known boiler.
[0066] Due to this configuration, the temperature of the adsorption tank 6 can be adjusted by the heater 18 that is independent of the combustion device 2. Accordingly, the temperature of the adsorption tank 6 can be controlled independently from the temperature in the agriculture greenhouse 100.
[0067] The carbon dioxide application device 1 may be configured to use at least a portion of the combustion exhaust gas so as to directly heat the adsorption tank 6.
[0068] In such a case, the exhaust gas flow path 10 may be disposed, as shown in FIG. 7, for example, to make a detour around the adsorption tank 6 so as to be in contact with the adsorption tank 6.
This configuration allows direct heating of the adsorption tank 6 with the combustion exhaust gas, which can further increase the temperature of the adsorption tank 6, and thus the adsorption tank 6 can be inhibited from undergoing condensation.
[0069] It may be possible to divide a function of one element in the above-described embodiment to a plurality of elements, or to integrate functions of a plurality of elements into one element. The configurations in the above-described embodiments may be partly omitted. At least part of the configuration of the above-described embodiments may be added to or replaced with the configuration of other embodiments described above. Any form that falls within the scope of the technical idea defined by the language of the appended claims may be an embodiment of the present disclosure.
[0070] The combustion device 2 corresponds to one example of the heater according to the present disclosure. The first liquid storage tank 3 and the second liquid storage tank 4 correspond to one example of the liquid storage tank according to the present disclosure. The first receiving path 11, the second receiving path 13, and the supply flow path 15 correspond to one example of the supply flow path according to the present disclosure.

Claims (7)

1. Een koolstofdioxide-toedieningsinrichting omvattende: ten minste één vloeistofopslagtank ingericht om een vloeistof op te slaan, en ingericht om een verbrandingsuitlaatgas op te nemen om mogelijk te maken dat het verbrandingsuitlaatgas door de vloeistof gaat; een absorptietank omvattende een absorbeermiddel ingericht om koolstofdioxide te absorberen, waarbij de absorptietank is ingericht om koolstofdioxide in het verbrandingsuitlaatgas dat door de vloeistof is gegaan met het absorbeermiddel te absorberen, en waarbij de absorptietank in een positie geplaatst is waarin een temperatuur van de absorptietank hoger wordt dan een temperatuur van de ten minste ene vloeistofopslagtank; een toevoerstroomtraject ingericht om een verbrandingsuitlaatgas toe te voeren aan de absorptietank door de ten minste ene vloeistofopslagtank; en een uitlaatstroomtraject dat de absorptietank met een agrarische broeikas koppelt.A carbon dioxide delivery device comprising: at least one fluid storage tank adapted to store a fluid, and adapted to receive a combustion exhaust gas to allow the combustion exhaust gas to pass through the fluid; an absorption tank comprising an absorbent arranged to absorb carbon dioxide, the absorbent tank being adapted to absorb carbon dioxide in the combustion exhaust gas that has passed through the liquid with the absorbent, and wherein the absorbent tank is placed in a position where a temperature of the absorbent tank becomes higher then a temperature of the at least one liquid storage tank; a supply flow path adapted to supply a combustion exhaust gas to the absorption tank through the at least one liquid storage tank; and an exhaust flow path that couples the absorption tank to an agricultural greenhouse. 2. De koolstofdioxide-toedieningsinrichting volgens conclusie 1, waarbij de absorptietank in de agrarische broeikas is geplaatst, en waarbij de ten minste ene vloeistofopslagtank buiten de agrarische broeikas is geplaatst.The carbon dioxide delivery device according to claim 1, wherein the absorption tank is placed in the agricultural greenhouse, and wherein the at least one liquid storage tank is placed outside the agricultural greenhouse. 3. De koolstofdioxide-toedieningsinrichting volgens conclusie 1 of 2, verder omvattende een verwarmingseenheid die is ingericht om de absorptietank te verwarmen.The carbon dioxide delivery device according to claim 1 or 2, further comprising a heating unit adapted to heat the absorption tank. 4. De koolstofdioxide-toedieningsinrichting volgens conclusie 3, waarbij de verwarmingseenheid is ingericht om verbrandingsuitlaatgas dat koolstofdioxide bevat te produceren door een brandstof te verbranden, om ten minst een gedeelte van het verbrandingsuitlaatgas toe te voeren aan het toevoerstroomtraject en ten minste een gedeelte van de warmte die geproduceerd is door het verbranden te gebruiken om de absorptietank te verwarmen.The carbon dioxide delivery device according to claim 3, wherein the heating unit is adapted to produce combustion exhaust gas containing carbon dioxide by burning a fuel, to supply at least a portion of the combustion exhaust gas to the feed stream path and at least a portion of the heat produced by using the incineration to heat the absorption tank. 5. De koolstofdioxide-toedieningsinrichting volgens een van de conclusies 1-4, waarbij de vloeistof een giftige substanties verwijderende vloeistof omvat die giftige substanties uit het verbrandingsuitlaatgas verwijdert.The carbon dioxide delivery device according to any of claims 1-4, wherein the liquid comprises a toxic substance removing liquid which removes toxic substances from the combustion exhaust gas. 6. De koolstofdioxide-toedieningsinrichting volgens conclusie 5, waarbij de giftige substanties verwijderende vloeistof een waterig oplossing omvat van een samenstelling die reageert met sulfide en/of nitride.The carbon dioxide delivery device of claim 5, wherein the toxic substance removing fluid comprises an aqueous solution of a composition that reacts with sulfide and / or nitride. 7. Een werkwijze voor het afvangen van koolstofdioxide in een verbrandingsuitlaatgas, waarbij de werkwijze omvat: het opslaan van een vloeistof in ten minste één vloeistofopslagtank; en het toevoeren van het verbrandingsuitlaatgas naar een absorptietank door de ten minste ene vloeistofopslagtank, waarbij de absorptietank in een positie is geplaatst waarin een temperatuur van de absorptietank hoger wordt dan een temperatuur van de ten minste ene vloeistofopslagtank, en waarbij de absorptietank is ingericht om koolstofdioxide in het verbrandingsuitlaatgas, dat door de vloeistof gepasseerd is, te absorberen.A method for capturing carbon dioxide in a combustion exhaust gas, the method comprising: storing a liquid in at least one liquid storage tank; and supplying the combustion exhaust gas to an absorption tank through the at least one liquid storage tank, wherein the absorption tank is placed in a position in which a temperature of the absorption tank becomes higher than a temperature of the at least one liquid storage tank, and wherein the absorption tank is arranged for carbon dioxide in the combustion exhaust gas that has passed through the liquid.
NL2021510A 2017-08-31 2018-08-29 Carbon dioxide application device and method for capturing carbon dioxide contained in a combustion exhaust gas NL2021510B1 (en)

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