JP4243578B2 - Plant growth system that can promote plant growth - Google Patents

Description

  The present invention relates to a plant growth system that can promote plant growth. In particular, the present invention relates to a plant growing system that guides carbon dioxide generated by a reformer to a plant growing space.

In recent years, it has been recognized that plant growth under an atmosphere with a concentration higher than the concentration of carbon dioxide in the atmosphere has an effect on the growth and yield. 2. Description of the Related Art Conventionally, in a temperature control system such as a horticultural house, a technique for growing a plant using combustion exhaust gas containing carbon dioxide generated from a temperature control combustion device is known (see, for example, Patent Document 1).
JP-A-1-305809

  However, the combustion exhaust gas cannot be supplied to the horticultural house during a period when the temperature adjusting combustion device is not driven, such as in summer. Further, the combustion exhaust gas contains impurities such as sulfur in addition to carbon dioxide. Therefore, providing a device for removing impurities from the combustion exhaust gas is wasteful and is not preferable. Moreover, the amount of impurities contained in the combustion exhaust gas can be reduced by using a high-quality fuel as the fuel for the combustion apparatus. However, using high quality fuel is not preferable because the fuel cost increases.

  In order to solve such a problem, a plant growing system according to the first embodiment of the present invention includes a plant growing space for growing plants, a reformer that generates hydrogen and carbon dioxide from fossil fuel, and a reformer The carbon dioxide piping which leads the carbon dioxide produced | generated by the plant growth space, and the hydrogen piping which guide | induces the hydrogen produced | generated by the reformer to the hydrogen demand which consumes hydrogen.

  For this reason, it is possible to promote the growth of plants grown in the plant growing space.

  The plant growing system according to the present embodiment further includes a separation device that separates carbon dioxide from the mixture of hydrogen and carbon dioxide generated by the reformer, and the carbon dioxide pipe grows the carbon dioxide separated by the separation device. Lead to space. The hydrogen pipe leads the hydrogen separated by the separation device to the hydrogen demand. The reformer is provided in the vicinity of the plant growing space.

  For this reason, high purity carbon dioxide can be supplied to the plant growing space. In addition, the utilization rate of hydrogen used for power generation of the fuel cell can be increased.

  The hydrogen demand is a fuel cell that drives a pump that generates power using hydrogen and supplies carbon dioxide to the plant growing space.

  The fuel cell takes in a mixture of hydrogen and carbon dioxide and exhausts the mixture. The reformer burns the air-fuel mixture having a reduced hydrogen concentration and discharges hydrogen combustion gas. The carbon dioxide pipe guides the hydrogen combustion gas to the plant growing space.

  For this reason, both hydrogen and carbon dioxide can be utilized effectively.

  The reformer further includes a fossil fuel combustion chamber for burning fossil fuel, and a hydrogen combustion chamber that is separated from the fossil fuel combustion chamber and burns an air-fuel mixture having a reduced hydrogen concentration. The carbon dioxide pipe does not guide the exhaust gas from the fossil fuel combustion chamber to the plant growth space, but guides the hydrogen combustion gas to the plant growth space.

  For this reason, carbon dioxide with little pollution can be supplied to a plant growth space.

  Further, the plant growing system in this embodiment includes a carbon dioxide storage device that stores carbon dioxide generated by the reformer, and an amount of carbon dioxide that is consumed in the plant growing space is supplied from the separation device. When the amount of carbon dioxide that is excessive is stored in the carbon dioxide storage device, the amount of carbon dioxide consumed in the plant growing space is larger than the amount of carbon dioxide supplied from the separation device. In this case, the apparatus further includes a control unit that supplies an insufficient amount of carbon dioxide from the carbon dioxide storage device to the plant growing space.

  A control part supplies the quantity of the carbon dioxide according to the amount of solar radiation to the plant growth space to the plant growth space.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  According to the present invention, since the carbon dioxide generated by the reformer is supplied to the plant growing space, plant growth can be promoted.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the development means of the invention.

  FIG. 1 is a diagram illustrating an example of a configuration of a plant growing system 30 according to an embodiment of the present invention. An object of the present embodiment is to provide a plant growing system capable of promoting the growth of plants.

  The plant growing system 30 includes a greenhouse 40, a reformer 44, a reformed gas pipe 56, a separator 42, a hydrogen pipe 58, a fuel cell 50, a carbon dioxide pipe 48, a carbon dioxide storage tank 106, a pump 108, and a carbon dioxide storage valve. 102, a carbon dioxide supply valve 104, a control unit 100, a pyranometer 110, a heat demand 52, and a power demand 54. Plants 41 are cultivated inside the greenhouse 40.

  The reformer 44 is provided adjacent to the greenhouse 40. The reformer 44 generates reformed gas containing hydrogen and carbon dioxide from the raw material gas containing fossil fuel. The reformer 44 reforms, for example, city gas, propane gas, etc., for example, around 70% hydrogen, around 20% carbon dioxide, 2-3% methane, 2-3% nitrogen, and A reformed gas containing 10 ppm or less of carbon monoxide is generated. The reformer 44 generates heat necessary for generating reformed gas by burning fossil fuel supplied from outside. The reformed gas generated by the reformer 44 is guided to the separation device 42 by the reformed gas pipe 56.

  The separation device 42 separates carbon dioxide from the reformed gas generated by the reformer 44. A hydrogen pipe 58 and a carbon dioxide pipe 48 are connected to the separation device 42. The hydrogen pipe 58 guides the reformed gas from which carbon dioxide has been separated by the separation device 42 to the fuel cell 50. The carbon dioxide pipe 48 connects the greenhouse 40 and the separation device 42, and the carbon dioxide separated from the reformed gas by the separation device 42 is guided to the greenhouse 40 by the pump 108.

  The greenhouse 40 grows plants 41. The plant 41 grown in the greenhouse 40 performs photosynthesis and consumes carbon dioxide supplied from the carbon dioxide pipe 48 to generate oxygen.

  The fuel cell 50 is provided in the vicinity of the heat demand 52 and generates power using hydrogen contained in the reformed gas generated by the reformer 44. The fuel cell 50 is, for example, a polymer electrolyte fuel cell (PEFC) provided in a residential premises. The electric power generated by the fuel cell 50 is supplied to the pump 108 and the electric power demand 54. Further, the exhaust heat generated together with the power generation of the fuel cell 50 is supplied to the heat demand 52. The heat demand 52 is equipment that consumes hot water, for example, provided in a residence. Moreover, the heat demand 52 may be a hot water storage tank that accumulates hot water. Moreover, the heat demand 52 may be a device for heating the inside of the greenhouse 40. The power demand 54 is equipment that consumes power, for example, provided in a residence. The electric power demand 54 may be a device that warms the inside of the greenhouse 40, and may be a device that is necessary for the greenhouse 40 to function, such as a lighting device of the greenhouse 40.

  The carbon dioxide storage valve 102 connects the carbon dioxide pipe 48 and the carbon dioxide storage tank 106, and the ratio of the amount of carbon dioxide stored in the carbon dioxide storage tank 106 to the amount of carbon dioxide supplied from the separation device 42. To control. The carbon dioxide supply valve 104 connects the carbon dioxide storage tank 106 and the carbon dioxide pipe 48 to control the amount of carbon dioxide supplied from the carbon dioxide storage tank 106 to the greenhouse 40. The solar radiation meter 110 is provided inside the greenhouse 40 and measures the amount of solar radiation into the greenhouse 40.

  When the amount of carbon dioxide consumed in the greenhouse 40 is smaller than the amount of carbon dioxide supplied from the separation device 42, the control unit 100 controls the carbon dioxide storage valve 102 to provide an excess amount. Of carbon dioxide is stored in the carbon dioxide storage tank 106. Further, when the amount of carbon dioxide consumed in the greenhouse 40 is larger than the amount of carbon dioxide supplied from the separation device 42, the control unit 100 controls the carbon dioxide supply valve 104 to make an insufficient amount. Of carbon dioxide is supplied from the carbon dioxide storage tank 106 to the greenhouse 40.

  Further, the control unit 100 stores the relationship between the amount of solar radiation measured in the solar radiation meter 110 and the amount of carbon dioxide to be supplied to the greenhouse 40, and the amount of solar radiation into the greenhouse 40 is stored. The carbon dioxide storage valve 102 and the carbon dioxide supply valve 104 are controlled so as to supply a corresponding amount of carbon dioxide to the greenhouse 40. The greenhouse 40 may include a photon sensor that measures the photon density in the photosynthesis effective wavelength region, or an illuminance sensor that measures the intensity of light, in addition to the pyranometer 110. The amount of carbon dioxide to be supplied to the greenhouse 40 may be determined based on the photon density inside or the illuminance.

  Thus, in the plant growing system 30, the carbon dioxide contained in the reformed gas generated by the reformer 44 is supplied to the greenhouse 40, so that the growth of the plant 41 can be promoted. In addition, since the carbon dioxide pipe 48 guides the carbon dioxide separated by the separation device 42 to the greenhouse 40, high-purity carbon dioxide can be supplied to the greenhouse 40. In this way, carbon dioxide generated by the reformer 44 can be used effectively, and the amount of carbon dioxide discharged to the outside air can be reduced. Further, when the photosynthesis of the plant 41 is not active compared to the sunny daytime, such as the daytime cloudy time zone or nighttime, carbon dioxide is stored in the carbon dioxide storage tank 106 and the daytime sunny time zone, etc. Since the carbon dioxide stored in the carbon dioxide storage tank 106 can be supplied when the photosynthesis of the plant 41 is thriving, the carbon dioxide generated by the reformer 44 can be used without wasting it. Moreover, since the control part 100 supplies the amount of carbon dioxide according to the amount of solar radiation to the plant 41, even when the plant 41 is grown in a place open to the outside air, an appropriate amount of carbon dioxide is supplied. The plant 41 can be supplied.

  Further, since the separator 42 separates carbon dioxide from the reformed gas generated by the reformer 44, the utilization rate of hydrogen used for power generation of the fuel cell 50 is increased. In addition, the reformed gas produced by the reformer 44 has a lower content of impurities such as sulfur than the combustion gas obtained by burning fossil fuel. Therefore, the cost for installing the separation device 42 and the separation device 42 are reduced. The cost for maintaining can be reduced.

  In general, in order to grow the plant 41, it is desirable that the carbon dioxide concentration is around 10%. Therefore, the control unit 100 is supplied from the carbon dioxide pipe 48 so that the concentration of carbon dioxide in the greenhouse 40 is maintained at around 10% by controlling the carbon dioxide storage valve 102 and the carbon dioxide supply valve 104. The amount of carbon dioxide may be adjusted appropriately. Moreover, when the greenhouse 40 is for growing algae, the carbon dioxide concentration may be increased to around 50%. In this case, more carbon dioxide contained in the reformed gas produced by the reformer 44 can be consumed.

  FIG. 2 is a diagram illustrating an example of the configuration of the separation device 42. The separation device 42 includes a water absorption device 62, an amine absorption device 64, and an amine regeneration device 66. The separation device 42 absorbs carbon dioxide contained in the reformed gas supplied from the reformer 44 in water and an amine absorbing solution, and supplies the reformed gas having a reduced carbon dioxide concentration to the fuel cell 50. .

  The reformed gas generated by the reformer 44 is supplied to the water absorption device 62 through the reformed gas pipe 56. The reformed gas passing through the reformed gas pipe 56 is cooled by exchanging heat with the amine regenerator 66 and then supplied to the water absorber 62. Water is accumulated in the water absorption device 62, and by contacting the reformed gas with the water accumulated in the water absorption device 62, 60% or more of carbon dioxide in the reformed gas is absorbed by water. Let The water in the water absorption device 62 is desirably alkaline. The water that has absorbed carbon dioxide by the water absorbing device 62 is supplied to the greenhouse 40 through the carbon dioxide pipe 48. The water that has absorbed the carbon dioxide supplied to the greenhouse 40 is sprayed on the plant 41 to supply the plant 41 with carbon dioxide.

  The amine absorber 64 further absorbs carbon dioxide contained in the reformed gas supplied from the water absorber 62 by the amine absorbing liquid of the amine absorber 64, thereby further adding carbon dioxide contained in the reformed gas. To separate. As the amine absorbing liquid, an alkanolamine absorbing liquid such as monoethanolamine or diethanolamine is desirable. The reformed gas from which the carbon dioxide is further separated by the amine absorber 64 is supplied to the fuel cell 50 through the hydrogen pipe 58.

  The amine absorbing liquid circulates between the amine absorbing device 64 and the amine regenerating device 66. The amine absorbing liquid repeats absorption of carbon dioxide from the reformed gas in the amine regeneration device 66 and desorption of carbon dioxide in the amine regeneration device 66. The amine regenerator 66 desorbs carbon dioxide from the amine absorbing liquid by increasing the temperature of the amine absorbing liquid that has absorbed the carbon dioxide. As the heat source for desorbing carbon dioxide from the amine absorbing liquid, the heat of the reformed gas passing through the reformed gas pipe 56 is used. Further, the exhaust heat of the reformer 44 may be used as a heat source for desorbing carbon dioxide from the amine absorbing solution. For example, the combustion exhaust gas for heating the reformer 44 and the amine absorbent of the amine regeneration device 66 may be subjected to heat exchange. Carbon dioxide desorbed from the amine absorbing solution by the amine regenerator 66 is supplied to the greenhouse 40 through the carbon dioxide pipe 48.

  In addition, when the amount of carbon dioxide consumed in the greenhouse 40 is smaller than the amount of carbon dioxide supplied from the separation device 42, the excess amount of carbon dioxide accumulated in the water absorption device 62 is stored. The carbon dioxide may be stored by absorbing water and storing the water that has absorbed the carbon dioxide. Further, carbon dioxide may be stored by absorbing an excess amount of carbon dioxide in the amine absorption liquid and storing the amine absorption liquid that has absorbed the carbon dioxide.

  Another example of the separation device 42 is a separation device 42 that utilizes a pressure swing adsorption method (PSA method). In this case, the separation device 42 separates carbon dioxide from the reformed gas by the PSA method. As still another example of the separation device 42, the separation device 42 separates hydrogen using a PSA method, a membrane separation method, a hydrogen storage alloy purification method, or the like. In this case, the reformed gas is separated into hydrogen gas and the reformed gas from which hydrogen has been separated by the separator 42, and the reformed gas from which hydrogen has been separated is guided to the greenhouse 40 by the carbon dioxide pipe 48.

  FIG. 3 shows an example of the configuration of a plant growing system 30 according to another embodiment of the present invention. The plant growing system 30 includes a greenhouse 40, a reformer 44, a hydrogen pipe 58, a fuel cell 50, an offgas pipe 60, a carbon dioxide pipe 48, a heat demand 52, and a power demand 54. Plants 41 are cultivated inside the greenhouse 40. In FIG. 3, the configuration denoted by the same reference numeral as in FIG. 1 has the same or similar function as the configuration in FIG.

  The reformed gas generated by the reformer 44 is supplied to the anode of the fuel cell 50 through the hydrogen pipe 58. The fuel cell 50 generates power by consuming hydrogen in the reformed gas supplied to the anode of the fuel cell 50, and exhausts off-gas from the anode with a hydrogen concentration lower than that of the reformed gas supplied to the anode. . The off gas exhausted from the anode is guided to the reformer 44 through the off gas pipe 60.

  The reformer 44 burns off gas guided by the off gas pipe 60 and discharges hydrogen combustion gas. The reformer 44 has a combustion chamber for burning fossil fuel and a combustion chamber for burning off-gas, and a carbon dioxide pipe 48 connects the combustion chamber for burning off-gas and the greenhouse 40.

  Thus, since the carbon dioxide pipe 48 guides the hydrogen combustion gas generated by burning off-gas to the greenhouse 40, the greenhouse 40 is supplied with carbon dioxide having a low impurity concentration. Thereby, the growth of the plant 41 can be further promoted. Moreover, the energy for warming the greenhouse 40 can be reduced by supplying the warm hydrogen combustion gas obtained by combustion to the greenhouse 40. Moreover, both hydrogen and carbon dioxide can be used effectively.

  FIG. 4 is a diagram illustrating an example of the configuration of the reformer 44. FIG. 4 shows a cross section of the reformer 44. The reformer 44 has a fossil fuel combustion chamber 78, a hydrogen combustion chamber 80, and a catalyst chamber 92 in a cylindrical container formed by an outer cylinder 84, a lid 90, and a bottom 91. The inner cylinder 85 is disposed concentrically with a space on the radially inner side of the outer cylinder 84, and a catalyst chamber 92 is formed between the outer cylinder 84 and the inner cylinder 85. The catalyst chamber 92 includes a reforming layer 72, a CO conversion layer 74, a CO selective removal layer 76, an intermediate first cylinder 88, and an intermediate second cylinder 89. The intermediate first cylinder 88 and the intermediate second cylinder 89 are disposed concentrically between the outer cylinder 84 and the inner cylinder 85. The intermediate first cylinder 88 is disposed radially inward of the intermediate second cylinder 89.

  The fossil fuel combustion chamber 78 and the hydrogen combustion chamber 80 are formed inside the inner cylinder 85 in the radial direction, and are separated from each other by a combustion chamber partition wall 87. The fossil fuel combustion chamber 78 is formed in a space surrounded by the inner cylinder 85, the combustion chamber partition wall 87, and the lid 90, and includes a combustion cylinder 86 and a fossil fuel burner 79. A fossil fuel pipe 96 is connected to the fossil fuel burner 79. The hydrogen combustion chamber 80 is formed by a space surrounded by the inner cylinder 85, the combustion chamber partition wall 87, and the bottom 91, and includes a hydrogen burner 81 and a combustion cylinder 86. An off-gas pipe 60 is connected to the hydrogen burner 81. The combustion cylinder 86 is arranged concentrically at intervals on the radially outer side of the fossil fuel burner 79 and the hydrogen burner 81.

  The lid 90 includes a raw material gas inlet 71 and a fossil fuel combustion gas outlet 82. The bottom 91 includes a reformed gas outlet 77 and a hydrogen combustion gas outlet 83. The outer cylinder 84 is provided with an air inlet 94.

  Fossil fuels such as city gas and LP gas are supplied from the fossil fuel pipe 96 to the fossil fuel burner 79 and burned by the fossil fuel burner 79. The fossil fuel combustion gas is discharged to the outside from the fossil fuel combustion gas discharge port 82. Further, the offgas supplied from the anode of the fuel cell 50 is supplied to the hydrogen burner 81 through the offgas pipe 60 and burns in the hydrogen combustion chamber 80. The hydrogen combustion gas generated by the combustion of the hydrogen burner 81 flows out from the carbon dioxide pipe 48 connected to the hydrogen combustion gas discharge port 83. The reformed layer 72 is heated by combustion in the fossil fuel burner 79 and the hydrogen burner 81.

  A raw material gas that is a mixed vapor of reforming raw material gas such as city gas and LP gas and water vapor flows to the reforming layer 72 through a raw material gas pipe 98 connected to the raw material gas inlet 71. The raw material gas sequentially passes through the reforming layer 72, the CO conversion layer 74, and the CO selective removal layer 76 included in the catalyst chamber 92, and then flows out as a reformed gas to the hydrogen pipe 58 connected to the reforming gas outlet 77. .

化学式（１）で示される反応は吸熱反応である。このため、化学式（１）で示される反応は、化石燃料バーナ７９および水素バーナ８１の燃焼熱を吸収することで反応が進行する。 The reforming layer 72 is formed by filling the space between the inner cylinder 85 and the intermediate first cylinder 88 with the reforming catalyst. As the reforming catalyst for the reforming layer 72, for example, a nickel-based or ruthenium-based catalyst is used. The source gas flowing from the source gas inlet 71 is converted into a reformed gas containing hydrogen and carbon monoxide by the reaction represented by the following chemical formula (1) in the reformed layer 72.

The reaction represented by the chemical formula (1) is an endothermic reaction. For this reason, the reaction represented by the chemical formula (1) proceeds by absorbing the combustion heat of the fossil fuel burner 79 and the hydrogen burner 81.

  The CO shift layer 74 is formed by filling a space between the intermediate first cylinder 88 and the intermediate second cylinder 89 with a CO shift catalyst. As the CO conversion catalyst for the CO conversion layer 74, for example, a platinum-based or ruthenium-based catalyst is used. The CO metamorphic layer 74 is adjacent to the modified layer 72 with the intermediate first cylinder 88 interposed therebetween. In addition, the modified layer 72 communicates with a gap between the intermediate first cylinder 88 and the bottom 91. As a result, the reformed gas generated in the reformed layer 72 flows from the reformed layer 72 to the CO shift layer 74 through the gap between the intermediate first cylinder 88 and the bottom 91. While the reformed gas passes through the CO shift layer 74, a CO shift reaction occurs. As a result, the concentration of carbon monoxide in the reformed gas after passing through the CO conversion layer 74 is reduced to around 0.5%.

  The CO selective removal layer 76 is formed by filling the space between the intermediate second cylinder 89 and the outer cylinder 84 with a selective oxidation catalyst. As the selective oxidation catalyst for the CO selective removal layer 76, for example, a ruthenium-based or platinum-based catalyst is used. The CO selective removal layer 76 is adjacent to the CO metamorphic layer 74 with the intermediate second cylinder 89 interposed therebetween. Further, it communicates with the CO metamorphic layer 74 through a gap between the intermediate second cylinder 89 and the lid 90. As a result, the reformed gas flowing out from the CO conversion layer 74 flows from the CO conversion layer 74 to the CO selective removal layer 76 through the gap between the intermediate second cylinder 89 and the lid 90. While the reformed gas passes through the CO selective removal layer 76, a CO selective oxidation reaction with oxygen in the air taken in from the air inlet 94 occurs. This further reduces the carbon monoxide concentration in the reformed gas. Desirably, the concentration of carbon monoxide in the reformed gas flowing out to the hydrogen pipe 58 is reduced to 10 ppm or less.

  As described above, hydrogen contained in the off-gas discharged from the anode of the fuel cell 50 is burned by the hydrogen burner 81 included in the hydrogen combustion chamber 80 of the reformer 44. The combustion heat of the off gas promotes the reforming reaction in the reforming layer 72. The hydrogen combustion gas generated by off-gas combustion has less impurities such as sulfur compared to the case where fossil fuel is burned. Therefore, the hydrogen combustion gas can be directly supplied to the greenhouse 40. That is, the growth of the plant 41 can be further promoted by supplying the greenhouse gas 40 with the hydrogen combustion gas containing carbon dioxide while utilizing the heat generated during the combustion of the off-gas for the generation of the reformed gas of the raw material gas. . Further, since the fossil fuel combustion gas discharged from the fossil fuel burner 79 is not supplied to the greenhouse 40, an inexpensive fuel containing sulfur or the like can be used as the fuel for the fossil fuel burner 79.

  As apparent from the above description, according to the plant growing system 30 in the first and second embodiments, the carbon dioxide pipe 48 guides the carbon dioxide generated by the reformer 44 to the greenhouse 40, so It can promote growth. Moreover, according to the plant growing system 30 in the first embodiment, the carbon dioxide pipe 48 guides the carbon dioxide separated from the reformed gas by the separation device 42 to the greenhouse 40, so that high-purity carbon dioxide is supplied. Can do. Therefore, the growth of the plant 41 can be further promoted. Further, since the separation device 42 separates carbon dioxide from the reformed gas generated by the reformer 44, the utilization rate of hydrogen used for power generation of the fuel cell 50 can be increased. Further, according to the plant growing system 30 in the second embodiment, the offgas containing hydrogen and carbon dioxide discharged from the anode of the fuel cell 50 is led to the reformer 44 by the offgas pipe 60, and the hydrogen combustion chamber 80 The hydrogen combustion gas obtained by burning and off-gas combustion is guided to the greenhouse 40. Therefore, both hydrogen and carbon dioxide can be used effectively. Moreover, since carbon dioxide with few impurities can be supplied to the greenhouse 40, the growth of the plant 41 can be further promoted.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements are also included in the technical scope of the present invention.

An example of the composition of the plant breeding system 30 concerning the embodiment of the present invention is shown. An example of the configuration of the separation device 42 is shown. An example of the composition of the plant breeding system 30 concerning other embodiments of the present invention is shown. An example of the configuration of the reformer 44 is shown.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 30 ... Plant upbringing system, 40 ... Greenhouse, 41 ... Plant, 42 ... Separation device, 44 ... Reformer, 48 ... Carbon dioxide piping, 50 ... Fuel cell, 52 ... Heat demand, 54 ... Electricity demand, 56 ... Reformed gas piping, 58 ... Hydrogen piping, 60 ... Off-gas piping, 62 ... Water absorption device, 64 ... Amine Absorber, 66 ... Amine regenerator, 71 ... Raw material gas inlet, 72 ... Modified layer, 74 ... CO conversion layer, 76 ... CO selective removal layer, 77 ... Modified Gas outlet, 78 ... fossil fuel combustion chamber, 79 ... fossil fuel burner, 80 ... hydrogen combustion chamber, 81 ... hydrogen burner, 82 ... fossil fuel combustion gas outlet, 83 ... Hydrogen combustion gas discharge port, 84 ... outer cylinder, 85 ... inner cylinder, 86 ... combustion cylinder, 87 ... combustion chamber space 88 ... Intermediate first cylinder, 89 ... Intermediate second cylinder, 90 ... Lid, 91 ... Bottom, 92 ... Catalyst chamber, 94 ... Air inlet, 96 ... Fossil Fuel piping, 98 ... Raw material gas piping, 100 ... Control unit, 102 ... Carbon dioxide storage valve, 104 ... Carbon dioxide supply valve, 106 ... Carbon dioxide storage tank, 108 ... Pump 110 ... Solarimeter

Claims (3)

A plant growing space for growing plants,
A reformer that generates hydrogen and carbon dioxide from the source gas;
Hydrogen and carbon dioxide generated by the reformer are supplied to a fuel cell that generates power by exhausting a mixture of hydrogen and carbon dioxide generated by the reformer and exhausts the mixture having a reduced hydrogen concentration. Leading hydrogen piping,
A carbon dioxide pipe for guiding the hydrogen combustion gas discharged from the reformer by burning the air-fuel mixture having the reduced hydrogen concentration to the plant growth space;
The reformer is
A fossil fuel combustion chamber for burning fossil fuel;
A hydrogen combustion chamber that separates from the fossil fuel combustion chamber and burns the mixture with a reduced hydrogen concentration;
The carbon dioxide pipe is connected to the hydrogen combustion chamber, and is a plant growth system that guides the hydrogen combustion gas generated by burning the air-fuel mixture having a reduced hydrogen concentration to the plant growth space. The reformer is
A reforming layer that absorbs combustion heat in the fossil fuel combustion chamber and the hydrogen combustion chamber and generates a reformed gas containing hydrogen and carbon monoxide from the source gas;
A CO conversion layer formed adjacent to the modification layer and reducing the carbon monoxide concentration in the reformed gas generated in the modification layer by a CO conversion reaction;
A CO selective removal layer formed adjacent to the CO conversion layer, and further reducing the carbon monoxide concentration in the reformed gas from the CO conversion layer by a CO selective oxidation reaction ;
I have a,
The fossil fuel combustion chamber and the hydrogen combustion chamber are formed inside the reforming layer,
The fossil fuel combustion chamber, the hydrogen combustion chamber, and the reformed layer are formed in a cylindrical container formed by an outer cylinder, a lid, and a bottom,
The fossil fuel combustion chamber has a combustion chamber partition wall that separates the fossil fuel combustion chamber and the hydrogen combustion chamber, the lid, and the inner cylinder on the radially inner side of the inner cylinder disposed radially inward of the outer cylinder. Formed in a space surrounded by
The hydrogen combustion chamber is formed in a space surrounded by the bottom, the inner cylinder, and the combustion chamber partition wall on the radially inner side of the inner cylinder.
The fossil fuel combustion chamber and the hydrogen combustion chamber are formed radially inside the reformed layer,
The lid has a source gas inlet for supplying the source gas to the modified layer,
The plant growth system according to claim 1, wherein the hydrogen pipe guides the reformed gas from the CO selective removal layer to the fuel cell. The plant growth system according to claim 1, wherein the fuel cell drives a pump that supplies carbon dioxide generated by the reformer to the plant growth space.

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