Environmental control equipment for greenhouse cultivation

Abstract

To provide an environment controller for facility cultivation in which stable cultivation environment can be realized while utilizing carbonic acid gas and exhaust heat generated in biomass power generation.SOLUTION: An environment controller comprises: biomass power generation means 10 configured by including a gasification furnace 11 which generates inflammable gas by using biomass as a fuel, an engine 12 which obtains power by using the inflammable gas as a fuel, and a power generator 13 which generates electricity by the power; and a cultivation installation 20 which can utilize exhaust from the biomass power generation means 10 for environmental control in order to grow farm products by facility cultivation. Since the cultivation installation 20 utilizes exhaust from the biomass power generation means 10 for environmental control in order to raise farm products by facility cultivation, the raising of field crops in a stable cultivation environment can be realized while utilizing exhaust generated by biomass power generation.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an environmental control device for greenhouse cultivation that utilizes carbon dioxide gas and exhaust heat generated by woody biomass power generation. [Background technology]

[0002] For wood biomass power generation with an output of 100 to 2000kW, the "gasification engine method" is often used, which is highly efficient even on a small scale. In wood biomass power generation, thinned wood, which is difficult to use for building materials, is accumulated in a stockyard and processed into chips, which are used as fuel. These are dried from a chip silo and fed into a gasification furnace, which then operates a generator to generate electricity. By-products of power generation include waste heat and exhaust gas containing a lot of carbon dioxide.

[0003] Meanwhile, greenhouse agriculture is being considered as a way to effectively utilize the waste heat and exhaust gases generated as by-products of power generation. Greenhouse agriculture is a type of agriculture in which crops are grown in glasshouses or vinyl greenhouses, where the temperature, humidity, and other growth environments are controlled.

[0004] The applicant is aware of the following Patent Documents 1 to 4 as prior art documents related to such woody biomass power generation and greenhouse cultivation.

[0005] Patent Document 1 contains the following description.

[0020] Furthermore, the biomass power generation system 10 has a biomass gas generation means 16 that generates biomass gas from the wood material dried by the wood material drying means 12. This biomass gas generation means 16 has a fuel shaping section 17 that compresses and heats the wood material dried by the wood material drying means 12, and a gasification furnace 18 that is connected to the fuel shaping section 17 and pyrolyzes the briquettes shaped in the fuel shaping section 17. Details of the biomass gas generation means 16 will be described later.

[0021] Finally, the biomass power generation system 10 includes a power generation unit 20 that generates electricity by driving an engine (gas engine) using biomass gas (hereinafter simply referred to as gas) produced in the gasifier 18. The gas produced in the gasifier 18 is purified by a purification unit to remove impurities (condensate) such as tar, if necessary, and then compressed to 3 to 5 atmospheres before being supplied to the engine (not shown) of the power generation unit 20. The engine, supplied with gas (fuel), is then driven, generating electricity in the power generation unit 20. Heat can be recovered from the engine's exhaust gas by heat exchange or the like and supplied to the wood drying unit 12 (wood drying and conveying unit 14) (arrow a in FIG. 1), thereby allowing wood to be dried using a portion of the exhaust heat from the power generation unit 20. Similarly, a portion of the exhaust heat from the power generation unit 20 can also be used as an auxiliary heating source for the fuel molding unit 17 and the gasifier 18 (arrow b in FIG. 1).

[0006] Patent Document 2 contains the following description.

[0020] Example 1: Figure 1 is a flow diagram of a bioenergy utilization system centered on a floating, externally heated gasification reaction facility that produces high-calorie gas according to the present invention. The gasification reaction facility 101 includes a reaction tube 306 (see Figures 2 and 3). The reaction tube receives reaction water 115 and biomass fine powder 112 and is configured to be heated externally by high-temperature biomass combustion gas 114. The crushing facility 102 receives biomass and produces fine powder with an average particle size of 3 mm or less, preferably 1 mm or less, and is configured to separate and discharge the fine powder 112 with an average particle size of 3 mm or less from the coarse powder 113 with an average particle size exceeding 3 mm. In this example, a crusher and impact mill were used in combination. The thermal gas generator 103 receives the biomass coarse powder 113 and combusts it with a combustion support such as air to produce high-temperature biomass combustion gas 114. The dehydration device 104 has an internal cooling heat transfer surface and is structured to condense and remove high boiling point substances such as moisture and sulfur compounds in the gas introduced into the tower. The gas tank 105 is a water-sealed tank and is structured to be able to store the generated gas. The gas engine 106 has the capacity to burn the generated gas in this example and operate a generator.

[0007] Patent Document 3 contains the following description.

[0014] This exhaust gas utilization device 10 is connected to the reformer 2 of the fuel cell 1 and is equipped with an exhaust main pipe 11 that discharges exhaust gas from the reformer 2. The ends of this exhaust main pipe 11 are connected to two exhaust branch pipes 12 and 13. One exhaust branch pipe 12 is connected to the inside of a plant greenhouse 14, and the other exhaust branch pipe 13 is open to the atmosphere via a heat exchanger 15.

[0015] Each exhaust branch pipe 12, 13 is provided with a damper, i.e., a shut-off valve device 16, 17, upstream of the plant greenhouse 14 and the heat exchanger 15. These shut-off valve devices 16, 17 are configured to be controlled by means not shown so that when one shut-off valve device 16 is open, the other shut-off valve device 17 is closed, or vice versa, or both shut-off valve devices 16, 17 are open.

[0008] Patent Document 4 contains the following description.

[0022] In Figure 1, 1 is a sealed carbon dioxide dissolution tank, and 2 is a lid that can seal the carbon dioxide dissolution tank 1 and is used to store water, liquid fertilizer concentrate, or powdered liquid fertilizer. 3 is the gas layer of the carbon dioxide dissolution tank 1, and 4 is the liquid layer. An aspirator 5 is installed below the liquid layer 4, and its liquid supply port 6 is connected to a liquid supply pipe 9 from a dual-purpose pump 8 for liquid supply circulation and liquid supply, which is equipped with a switch cock 7 for supplying liquid to the outside. Furthermore, a pipe 12 connected to an air supply port 11 installed in the gas layer 3 is connected to the air intake port 10 of the aspirator 5. Furthermore, a liquid supply port 14 of a pipe 13 for supplying liquid from the dual-purpose pump 8 is installed in the liquid layer 4. A carbon dioxide supply port 15 for supplying carbon dioxide to the carbon dioxide dissolution tank 1 is installed in the gas layer 3. Furthermore, a carbon dioxide area-type flow meter 16 connected to the outside is installed in the gas layer 3. When producing water or growing solution with dissolved carbon dioxide, first set the switch cock 7 of the dual-purpose pump 8 to the liquid supply circulation position, add a predetermined amount of water, liquid fertilizer concentrate, or powdered liquid fertilizer through the lid 2, seal it, operate the dual-purpose pump 8, supply carbon dioxide from the carbon dioxide gas cylinder 17 through the piping 18 and adjustment valve 19 to the supply port 15, and circulate the growing solution through the aspirator 5. This homogenizes the fertilizer components in the growing solution, and the carbon dioxide in the air layer 3 is drawn into the intake port 10 of the aspirator 5 through the intake port 11, forming bubbles that dissolve in the growing solution. Furthermore, the carbon dioxide that flows out into the air layer 3 as bubbles or that separates again after dissolution is drawn in again through the intake port 11 and dissolved in the liquid layer 4. When the carbon dioxide becomes saturated, the carbon dioxide dissolution tank becomes pressurized, and carbon dioxide flows out from the carbon dioxide area flow meter 16, confirming that there is an excess of carbon dioxide. Then, the supply of carbon dioxide from the carbon dioxide cylinder 17 is stopped, the switching cock 7 is set to the liquid supply side, and water or growth liquid with a high concentration of dissolved carbon dioxide can be supplied by supplying the water or growth liquid with dissolved carbon dioxide. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Publication No. 2020-15793 [Patent Document 2] Patent No. 4227771 [Patent Document 3] Japanese Patent Application Publication No. 6-333589 [Patent Document 4] Japanese Patent Application Laid-Open No. 2012-10687 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0010] The above-mentioned Patent Document 1 discloses a "biomass power generation device" that generates electricity by thermally decomposing and gasifying wood biomass fuel obtained by drying chips of unused wood resources (wood material) such as thinned wood. The above-mentioned Patent Document 1 also describes the use of heat recovered from engine exhaust gas to dry the wood material. However, the above-mentioned Patent Document 1 does not include any technical idea of ​​utilizing waste products from biomass power generation in agriculture.

[0011] The above-mentioned Patent Document 2 discloses a "biomass gasification method" that can be used even on a small scale to obtain high-calorie, clean fuel gas suitable for power-generating gas engines from biomass resources at a high yield. However, the above-mentioned Patent Document 2 does not include any technical idea of ​​utilizing waste products from biomass power generation in agriculture.

[0012] The above-mentioned Patent Document 3 relates to a "method for utilizing exhaust gas from a fuel cell." The Patent Document 3 discloses an example in which exhaust gas generated when fossil fuels are reformed in a reformer is sent to a plant greenhouse during the daytime, causing plants to absorb carbon dioxide in the exhaust gas and generate oxygen through photosynthesis, and the heat contained in the exhaust gas is used to heat the plant greenhouse, thereby promoting plant growth. However, Patent Document 3 does not include any technical idea of ​​utilizing waste materials obtained by utilizing biomass in agriculture.

[0013] The above-mentioned Patent Document 4 relates to an "efficient supply device and supply method for carbon dioxide dissolved water and growth water containing dissolved carbon dioxide to be applied to plants and algae." The above-mentioned Patent Document 4 discloses a device that selectively supplies carbon dioxide without loss, reduces running costs, and efficiently supplies carbon dioxide when increasing the carbon dioxide concentration in a greenhouse or plant factory where plants are grown. However, Patent Document 4 does not include any technical idea of ​​utilizing waste products obtained from biomass in agriculture.

[0014] 〔the purpose〕 The present invention is intended to solve the above problems and has been made with the following objectives. An environmental control device for greenhouse cultivation is provided that utilizes waste generated by biomass power generation and can realize a stable cultivation environment. [Means for solving the problem]

[0015] In order to achieve the above object, the environmental control device for greenhouse cultivation of claim 1 employs the following configuration. a biomass power generation means including a gasification furnace that generates combustible gas using biomass as fuel, an engine that obtains power using the combustible gas as fuel, and a generator that generates power using the power; a cultivation facility capable of utilizing the wastewater from the biomass power generation means for environmental control for growing agricultural products through greenhouse cultivation, a waste heat recovery device that exchanges waste heat, which is the discharged product, with a fluid passing through a waste heat recovery path; a circulation path for circulating a thermal fluid that is heated by heat exchange with the fluid in the exhaust heat recovery path; Further provided is a boiler for heating the thermal fluid circulated through the circulation path, The heat of the thermal fluid circulated through the circulation path is utilized for the environmental control by the heating using the exhaust heat of the discharged product and the heating using the boiler. 、 The present invention is configured to include a dryer that dries the biomass by passing a fluid through the exhaust heat recovery path and utilizing a portion of the exhaust heat of the discharged product, and to utilize the remaining portion of the exhaust heat of the discharged product, excluding the heat utilized in the dryer, for the environmental control on the secondary side of the dryer. are.

[0019] Claim 2 The environmental control device for greenhouse cultivation is 1st article In addition to the above configuration, the following configuration was adopted. The carbon dioxide-containing exhaust gas, which is the discharged product, is supplied to the cultivation facility and used for the environmental control.

[0020] Claim 3 The environmental control device for greenhouse cultivation is 2 In addition to the above configuration, the following configuration was adopted. a virgin carbon dioxide supply means for supplying virgin carbon dioxide to the cultivation facility for use in the environmental control, The amount of virgin carbon dioxide supplied from the virgin carbon dioxide supply means is controlled in accordance with the amount of carbon dioxide-containing exhaust gas supplied to the cultivation facility.

[0021] Claim 4 The environmental control device for greenhouse cultivation employs the following features in addition to the features described in claim 1. The combustion exhaust gas from the boiler is supplied to the cultivation facility and used for the environmental control.

[0022] Claim 5 The environmental control device for greenhouse cultivation employs the following features in addition to the features described in claim 1. a virgin carbon dioxide supply means for supplying virgin carbon dioxide to the cultivation facility for use in the environmental control, The amount of virgin carbon dioxide supplied from the virgin carbon dioxide supply means is controlled in accordance with the amount of combustion exhaust gas from the boiler supplied to the cultivation facility. [Effects of the Invention]

[0023] The environmental control device for greenhouse cultivation described in claim 1 includes a biomass power generation means and a cultivation facility. The biomass power generation means includes a gasifier, an engine, and a generator. The gasifier generates combustible gas using biomass as fuel. The engine obtains power using the combustible gas as fuel. The generator generates power using the power. The device also includes a waste heat recovery device, a circulation path, and a boiler. The waste heat recovery device exchanges waste heat, which is the discharge, with a fluid passing through the waste heat recovery path. The circulation path circulates a thermal fluid that is heated by heat exchange with the fluid in the waste heat recovery path. The boiler heats the thermal fluid circulated through the circulation path. The heating by the waste heat, which is the discharge, and the heating by the boiler are configured so that the heat of the thermal fluid circulated through the circulation path is used for the environmental control. In this way, the cultivation facility uses the discharge from the biomass power generation means for environmental control for growing agricultural products through greenhouse cultivation. Therefore, by utilizing the waste generated by biomass power generation, it is possible to realize the cultivation of agricultural crops in a stable cultivation environment. Furthermore, the exhaust heat, which is the exhaust, is utilized for the environmental control. In particular, during periods such as winter when heating control of the cultivation environment is required, the exhaust heat generated by biomass power generation can be utilized, resulting in significant cost benefits for stabilizing the cultivation environment. Furthermore, by circulating a thermal fluid in the cultivation facility, the heat of the thermal fluid is utilized for the environmental control. In this case, the exhaust heat generated by biomass power generation is utilized to heat the circulating fluid, thereby achieving a stable cultivation environment. By utilizing the exhaust heat, boiler operation can be reduced, thereby reducing the boiler combustion costs required for heating and controlling the cultivation environment. The environmental control device for greenhouse cultivation also includes a dryer that dries the biomass by passing a fluid through the exhaust heat recovery path and utilizing a portion of the exhaust heat emitted by the drain, and is configured to utilize the remaining portion of the exhaust heat emitted by the dryer, excluding the heat utilized by the dryer, for the environmental control on the secondary side of the dryer. By utilizing a portion of the exhaust heat for drying the biomass used as fuel for biomass power generation and utilizing the remaining portion of the exhaust heat emitted by the dryer, excluding the heat utilized by the dryer, for heating control of the cultivation environment on the secondary side of the drying, it is possible to realize an efficient heat cycle in biomass power generation while utilizing the exhaust heat generated by biomass power generation to stabilize the cultivation environment.

[0027] Claim 2 The environmental control device for greenhouse cultivation supplies the carbon dioxide-containing exhaust gas, which is the discharged product, to the cultivation facility and uses it for the environmental control. Since the carbon dioxide-containing exhaust gas generated by biomass power generation can be used as the carbon dioxide necessary to stabilize the cultivation environment, there is a significant cost advantage in stabilizing the cultivation environment.

[0028] Claim 3 The environmental control device for greenhouse cultivation is equipped with a virgin carbon dioxide supply means. The virgin carbon dioxide supply means supplies virgin carbon dioxide to the cultivation facility for use in the environmental control. The amount of virgin carbon dioxide supplied from the virgin carbon dioxide supply means is controlled according to the amount of carbon dioxide-containing exhaust gas supplied to the cultivation facility. The supply of virgin carbon dioxide can be reduced by the amount of carbon dioxide-containing exhaust gas generated by biomass power generation that is used, thereby reducing the cost of consuming virgin carbon dioxide required to stabilize the cultivation environment.

[0029] Claim 4 The environmental control device for greenhouse cultivation supplies combustion exhaust gas from the boiler to the cultivation facility and utilizes it for the environmental control. The combustion exhaust gas generated from the boiler that circulates thermal fluid through the cultivation facility and is utilized for the environmental control is supplied to the cultivation facility. Carbon dioxide contained in the combustion exhaust gas is utilized for the environmental control, resulting in significant cost benefits for stabilizing the cultivation environment.

[0030] Claim 5 The environmental control device for greenhouse cultivation is equipped with a virgin carbon dioxide supply means for supplying virgin carbon dioxide to the cultivation facility for use in the environmental control. The amount of virgin carbon dioxide supplied from the virgin carbon dioxide supply means is controlled according to the amount of combustion exhaust gas from the boiler supplied to the cultivation facility. Since the combustion exhaust gas contains carbon dioxide, the supply of virgin carbon dioxide can be reduced according to the supply of combustion exhaust gas, thereby reducing its consumption cost. [Brief explanation of the drawings]

[0031] [Figure 1] 1 is a diagram illustrating the configuration of an environmental control device for greenhouse cultivation according to one embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0032] Next, an embodiment of the present invention will be described.

[0033] [First embodiment] FIG. 1 is a diagram illustrating the configuration of an environmental control device for greenhouse cultivation according to an embodiment of the present invention.

[0034] [Basic structure] The environmental control device for greenhouse cultivation in the above embodiment includes a biomass power generation means 10 and a cultivation facility 20.

[0035] The cultivation facility 20 can utilize the discharge from the biomass power generation means 10 for environmental control for growing agricultural products through greenhouse cultivation.

[0036] The cultivation facility 20 is, for example, a greenhouse such as a vinyl greenhouse or a glass greenhouse, and is capable of controlling the cultivation environment inside. The environmental control device for greenhouse cultivation of this embodiment is configured to utilize the exhaust heat, which is the discharge from the biomass power generation means 10, for the environmental control. In addition, the exhaust gas containing carbon dioxide, which is the discharge, is supplied to the cultivation facility 20 and used for the environmental control.

[0037] [Biomass power generation means 10]

[0038] The biomass power generation means 10 is configured to include a gasifier 11, an engine 12, and a generator 13. It is a so-called gasification-engine type biomass power generation facility. The gasifier 11 generates combustible gas using biomass as fuel. The engine 12 obtains power using the combustible gas as fuel. The generator 13 generates power using the power obtained by the engine.

[0039] Examples of biomass that can be used as fuel for the gasification furnace 11 include wood chips, bamboo chips, sawdust, rice husks, and sludge. When wood chips are used as fuel, wood gas is generated as the combustible gas. The wood gas is obtained as a mixed gas mainly composed of hydrogen, carbon monoxide, carbon dioxide, and nitrogen. When the wood gas is used as engine fuel to generate electricity, high-temperature exhaust gas is emitted. The high-temperature exhaust gas has a heat of about 400°C. The heat of the high-temperature exhaust gas is utilized as the exhaust heat of the present invention. The high-temperature exhaust gas is a mixed gas mainly composed of water vapor, carbon dioxide, and nitrogen. Carbon dioxide-containing exhaust gas, the exhaust of the present invention, is recovered from the high-temperature exhaust gas and utilized.

[0040] [Recovery of carbon dioxide-containing exhaust gas] The high-temperature exhaust gas discharged from the biomass power generation means 10 passes through a high-temperature exhaust gas passage 10A, a harmful substance purifier 14, an exhaust heat recovery device 15, and a moisture remover 23, and is then supplied to the cultivation facility 20 via a carbon dioxide supply passage 22. In the illustrated example, the harmful substance purifier 14 is provided in a one-to-one correspondence with each biomass power generation means 10. Also, in the illustrated example, one exhaust heat recovery device 15 is provided, but similar to the harmful substance purifier 14, a harmful substance purifier 14 may be provided in a one-to-one correspondence with each biomass power generation means 10. The harmful substance purifier 14 removes harmful substances such as nitrogen oxides and carbon monoxide from the high-temperature exhaust gas. The exhaust heat recovery device 15 recovers exhaust heat from the high-temperature exhaust gas. The moisture remover 23 removes moisture from the high-temperature exhaust gas. In this way, the high-temperature exhaust gas is cooled by the exhaust heat recovery device 15, and a carbon dioxide-containing exhaust gas mainly composed of carbon dioxide and nitrogen is recovered. The carbon dioxide-containing exhaust gas contains a large amount of carbon dioxide, approximately 10% to 20% by volume.

[0041] [Supply of carbon dioxide-containing exhaust gas] The carbon dioxide-containing exhaust gas recovered as described above is supplied to the cultivation facility 20 via a carbon dioxide supply line 22 equipped with a blower 36, and is used for the environmental control of the cultivation facility 20.

[0042] In this embodiment, the cultivation facility 20 is provided with a virgin carbon dioxide supply means 40 that supplies virgin carbon dioxide to be used for the environmental control. The virgin carbon dioxide supply means 40 includes a liquefied carbon dioxide cylinder 41, an evaporator 42, and a control valve 43. The cultivation facility 20 is also provided with a carbon dioxide concentration meter 21 that detects the carbon dioxide concentration inside. The virgin carbon dioxide supply means 40 controls the opening of the control valve 43 in response to a detection signal from the carbon dioxide concentration meter 21, thereby controlling the carbon dioxide concentration inside the cultivation facility 20 to be within an appropriate range.

[0043] In this way, the amount of virgin carbon dioxide supplied from the virgin carbon dioxide supply means 40 is controlled according to the amount of carbon dioxide-containing exhaust gas supplied to the cultivation facility 20. In other words, if the amount of carbon dioxide-containing exhaust gas derived from the biomass power generation means 10 is large, the carbon dioxide concentration detected by the carbon dioxide concentration meter 21 will increase, and the amount of virgin carbon dioxide supplied from the virgin carbon dioxide supply means 40 will be controlled to decrease. Conversely, if the amount of carbon dioxide-containing exhaust gas derived from the biomass power generation means 10 is small, the carbon dioxide concentration detected by the carbon dioxide concentration meter 21 will decrease, and the amount of virgin carbon dioxide supplied from the virgin carbon dioxide supply means 40 will be controlled to increase.

[0044] [Waste heat recovery] The exhaust heat recovery device 15 recovers exhaust heat from the high-temperature exhaust gas discharged from the biomass power generation means 10. The exhaust heat recovery device 15 recovers the exhaust heat by exchanging heat from the high-temperature exhaust gas with a fluid circulating in an exhaust heat recovery path 15A equipped with a circulation pump 15B.

[0045] [Use of waste heat] The exhaust heat recovered as described above is utilized for the environmental control of the cultivation facility 20 by circulating a thermal fluid.

[0046] A portion of the exhaust heat is used to dry the biomass, and the remainder is used for the environmental control. That is, the fluid circulating through the exhaust heat recovery path 15A is branched and passed through the dryer 16, and a portion of the exhaust heat is used for drying the biomass in the dryer 16. At this time, the entire amount of hot water coming out of the exhaust heat recovery device 15 is first introduced into the dryer 16, and then introduced into a heat exchanger 51 (described later) on the secondary side. In this way, the exhaust heat can be effectively recovered.

[0047] The remainder of the exhaust heat is supplied via the exhaust heat recovery passage 15A and the heat exchanger 51 to the boiler 30, which will be described later.

[0048] In the heat exchanger 51, exhaust heat from the biomass power generation means 10 is heat exchanged with the fluid circulating in the circulation path 62. The fluid circulating in the circulation path 62 passes through the inlet flow path 31 of the boiler 30, and the exhaust heat from the biomass power generation means 10 heats the fluid passing through the inlet flow path 31 of the boiler 30.

[0049] [Boiler 30] This embodiment includes a boiler 30 for circulating a thermal fluid through the cultivation facility 20 and utilizing the heat of the thermal fluid for the environmental control. As described above, the fluid circulated through the cultivation facility 20 by the boiler 30 is heated using exhaust heat from the biomass power generation means 10. In this way, the exhaust heat is utilized for the environmental control.

[0050] The boiler 30 has an inlet flow path 31 and an outlet flow path 32. The fluid passing through the inlet flow path 31 is heated by combustion in the boiler 30 to become a thermal fluid, which is then circulated through the cultivation facility 20 via the outlet flow path 32 and a circulation pump 33. The fluid that has circulated through the cultivation facility 20 returns to the inlet flow path 31. In this circulation, the fluid passing through the inlet flow path 31 of the boiler 30 is heated by the exhaust heat from the biomass power generation means 10, as described above.

[0051] [Use of combustion exhaust gas] In this embodiment, the combustion exhaust gas from the boiler 30 is supplied to the cultivation facility 20 and utilized for the environmental control. That is, the combustion exhaust gas discharged from the boiler 30 passes through the combustion exhaust gas passage 30A, the damper 34, and the inducer fan 35 and flows into the carbon dioxide supply passage 22. In the damper 34, air is mixed into the combustion exhaust gas by the inducer action of the inducer fan 35. The combustion exhaust gas contains carbon dioxide, which is supplied to the cultivation facility 20 and utilized for the environmental control.

[0052] At this time, the amount of virgin carbon dioxide supplied from the virgin carbon dioxide supply means 40 is controlled according to the amount of combustion exhaust gas from the boiler 30 supplied to the cultivation facility 20. In other words, if the amount of combustion exhaust gas from the boiler 30 is large, the carbon dioxide concentration detected by the carbon dioxide concentration meter 21 will increase, and the amount of virgin carbon dioxide supplied from the virgin carbon dioxide supply means 40 will be controlled to decrease. Conversely, if the amount of combustion exhaust gas from the boiler 30 is small, the carbon dioxide concentration detected by the carbon dioxide concentration meter 21 will decrease, and the amount of virgin carbon dioxide supplied from the virgin carbon dioxide supply means 40 will be controlled to increase.

[0053] [Effects of the embodiment] The above embodiment has the following advantages.

[0054] The environmental control device for greenhouse cultivation in the above embodiment is equipped with a biomass power generation means 10 and a cultivation facility 20. The biomass power generation means 10 is composed of a gasifier 11, an engine 12, and a generator 13. The gasifier 11 generates combustible gas using biomass as fuel. The engine 12 obtains power using the combustible gas as fuel. The generator 13 generates power using the power. The cultivation facility 20 uses waste from the biomass power generation means 10 for environmental control for growing agricultural products through greenhouse cultivation. Therefore, it is possible to realize the growth of agricultural products in a stable cultivation environment by utilizing waste generated from biomass power generation.

[0055] The environmental control device for greenhouse cultivation of the above embodiment utilizes the exhaust heat, which is the exhaust, for the environmental control. In particular, during times such as winter when heating control of the cultivation environment is required, the exhaust heat generated by biomass power generation can be utilized, resulting in significant cost benefits for stabilizing the cultivation environment.

[0056] The environmental control device for greenhouse cultivation of the above embodiment utilizes a portion of the exhaust heat for drying the biomass and the remainder for the environmental control. By utilizing a portion of the exhaust heat for the drying required for the biomass used as fuel for biomass power generation and the remainder for heating control of the cultivation environment, it is possible to realize an efficient heat cycle in biomass power generation while utilizing the exhaust heat generated in biomass power generation to stabilize the cultivation environment.

[0057] The environmental control device for greenhouse cultivation in the above embodiment includes a boiler 30. The boiler 30 circulates a thermal fluid through the cultivation facility 20, thereby utilizing the heat of the thermal fluid for the environmental control. The boiler 30 uses the exhaust heat to heat the fluid circulated through the cultivation facility 20, thereby utilizing the exhaust heat for the environmental control. The exhaust heat generated by biomass power generation is used to heat the fluid circulated by the boiler 30, thereby achieving a stable cultivation environment. The utilization of the exhaust heat can reduce the operation of the boiler 30, thereby reducing the combustion cost of the boiler 30 required for heating and controlling the cultivation environment.

[0058] The environmental control device for greenhouse cultivation in the above embodiment supplies the carbon dioxide-containing exhaust gas, which is the discharged product, to the cultivation facility 20 and uses it for the environmental control. Since the carbon dioxide-containing exhaust gas generated by biomass power generation can be used as the carbon dioxide necessary to stabilize the cultivation environment, there is a significant cost advantage in stabilizing the cultivation environment.

[0059] The environmental control device for greenhouse cultivation in the above embodiment is equipped with a virgin carbon dioxide supply means 40. The virgin carbon dioxide supply means 40 supplies virgin carbon dioxide to the cultivation facility 20 for use in the environmental control. The amount of virgin carbon dioxide supplied from the virgin carbon dioxide supply means 40 is controlled according to the amount of carbon dioxide-containing exhaust gas supplied to the cultivation facility 20. The supply of virgin carbon dioxide can be reduced by the amount of carbon dioxide-containing exhaust gas generated by biomass power generation that is used, thereby reducing the cost of consuming virgin carbon dioxide required to stabilize the cultivation environment.

[0060] The environmental control device for greenhouse cultivation of the above embodiment supplies the combustion exhaust gas from the boiler 30 to the cultivation facility 20 and utilizes it for the environmental control. The combustion exhaust gas generated from the boiler 30, which circulates a thermal fluid through the cultivation facility 20 and utilizes it for the environmental control, is supplied to the cultivation facility 20. Carbon dioxide gas contained in the combustion exhaust gas is utilized for the environmental control, which has a significant cost benefit in stabilizing the cultivation environment.

[0061] The environmental control device for greenhouse cultivation in the above embodiment controls the amount of virgin carbon dioxide supplied from the virgin carbon dioxide supply means 40 depending on the amount of combustion exhaust gas from the boiler 30 supplied to the cultivation facility 20. Since the combustion exhaust gas contains carbon dioxide, the supply of virgin carbon dioxide can be reduced depending on the supply of combustion exhaust gas, thereby reducing its consumption cost.

[0062] Furthermore, the Sustainable Development Goals (SDGs) include ensuring access to sustainable and modern energy and promoting sustainable agriculture, and the present invention can contribute to some of these activities.

[0063] [Modification] The above describes a particularly preferred embodiment of the present invention, but the present invention is not intended to be limited to the illustrated embodiment, and can be modified and implemented in various ways, and the present invention is intended to encompass various modified examples. [Explanation of symbols]

[0064] 10: Biomass power generation methods 10A: High temperature exhaust gas passage 11: Gasifier 12: Engine 13: Generator 14: Harmful substance purifier 15: Waste heat recovery device 15A: Exhaust heat recovery path 15B: Circulation pump 16: Dryer 20: Cultivation facility 21: Carbon dioxide concentration meter 22: Carbon dioxide supply channel 23: Moisture remover 30: Boiler 30A: Combustion exhaust gas passage 31: Inlet channel 32: Outlet channel 33: Circulation pump 34: Damper 35: Inducement Fan 36: Blower 40: Virgin carbon dioxide supply means 41: Liquefied carbon dioxide gas cylinder 42: Evaporator 43: Control valve 51:Heat exchanger 62: Circulation path

Claims

1. a biomass power generation means including a gasification furnace that generates combustible gas using biomass as fuel, an engine that obtains power using the combustible gas as fuel, and a generator that generates power using the power; a cultivation facility capable of utilizing the wastewater from the biomass power generation means for environmental control for growing agricultural products through greenhouse cultivation, a waste heat recovery device that exchanges waste heat, which is the discharged product, with a fluid passing through a waste heat recovery path; a circulation path for circulating a thermal fluid that is heated by heat exchange with the fluid in the exhaust heat recovery path; Further provided is a boiler for heating the thermal fluid circulated through the circulation path, the heat of the thermal fluid circulated through the circulation path is utilized for the environmental control by the heating using the exhaust heat of the discharged product and the heating using the boiler; The system is configured to include a dryer that dries the biomass by passing a fluid through the exhaust heat recovery path and utilizing a portion of the exhaust heat that is the exhaust, and to utilize the remaining portion of the exhaust heat that is the exhaust, excluding the heat utilized in the dryer, for the environmental control on the secondary side of the dryer. An environmental control device for greenhouse cultivation.

2. The carbon dioxide-containing exhaust gas, which is the discharged product, is supplied to the cultivation facility and used for the environmental control. The environmental control device for greenhouse cultivation according to claim 1.

3. a virgin carbon dioxide supply means for supplying virgin carbon dioxide to the cultivation facility for use in the environmental control, The amount of virgin carbon dioxide gas supplied from the virgin carbon dioxide gas supply means is controlled in accordance with the amount of carbon dioxide gas-containing exhaust gas supplied to the cultivation facility. The environmental control device for greenhouse cultivation according to claim 2.

4. The combustion exhaust gas from the boiler is supplied to the cultivation facility and used for the environmental control. The environmental control device for greenhouse cultivation according to claim 1.

5. a virgin carbon dioxide supply means for supplying virgin carbon dioxide to the cultivation facility for use in the environmental control, The amount of virgin carbon dioxide supplied from the virgin carbon dioxide supply means is controlled in accordance with the amount of combustion exhaust gas from the boiler supplied to the cultivation facility. The environmental control device for greenhouse cultivation according to claim 1.

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