JP4822746B2 - Carbon dioxide supply device for greenhouse for horticulture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and device for supplying carbon dioxide for a nursery horticultural green house, capable of supplying the carbon dioxide necessary for photosynthesis effectively to horticultural crops for obtaining a high quality horticultural crops, also reducing the fuel consumption necessary for producing the carbon dioxide widely and having a high energy-saving effect. <P>SOLUTION: This device for supplying the carbon dioxide for the nursery horticultural green house 1 is characterized by being equipped with a carbon dioxide-absorbing means 3 containing a carbon dioxide-absorbing material 2 for absorbing and storing the carbon dioxide, a wind-blowing means 4 for blowing air containing the carbon dioxide or combustion exhaust gas to the carbon dioxide-absorbing means 3, and a heating means 5 for releasing the carbon dioxide gas into the green house by heating the carbon dioxide-absorbing material 2. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

The present invention is capable of obtaining a facility horticultural relates to carbon dioxide subjected KyuSo location of the greenhouse, high-quality horticultural be particularly provided to effectively horticultural carbon dioxide necessary for photosynthesis, yet carbon dioxide The present invention relates to a carbon dioxide supply device for greenhouses for horticultural horticulture that can greatly reduce the consumption of fuel necessary for manufacturing and has a high energy saving effect.

  In order to grow and produce horticultural crops such as sugar beets, fruits, garden trees, and flower buds in addition to normal seasons, a facility horticulture farming method for cultivating the horticultural crops in a greenhouse or other facility is widely practiced in suburbs of cities. In the greenhouse of this facility horticulture, a heater (heater) is operated to heat the inside of the greenhouse particularly during cold nights in winter. This warmer uses liquefied petroleum gas (LPG) and city gas as fuel as well as heavy oil and kerosene, and burns it with a burner as a heat source.

On the other hand, in order to produce high-quality horticultural crops, CO ₂ application devices that increase the concentration of carbon dioxide (hereinafter referred to as CO ₂ ), which is one of the raw materials used when plants perform photosynthesis in a greenhouse, are also in widespread use. The exhaust gas discharged from the warmer contains CO ₂ having a higher concentration than that in the atmosphere in order to burn fuel, which is a hydrocarbon, and the exhaust gas is supplied directly into the greenhouse as CO ₂ application. Has been put into practical use, and is disclosed in many technical documents such as Japanese Patent Application Laid-Open Nos. 2004-344154 and 2004-169937.
JP 2004-344154 A JP 2004-169937 A

However, in the above-mentioned conventional carbon dioxide supply apparatus, the photosynthesis reaction of the plant does not proceed at night when the warmer is operated for heating during cold weather, and there is no need to perform CO ₂ application. Operating the heater to produce the CO ₂ gas to be applied has a problem in that energy costs are increased due to wasteful consumption of fuel and the like. At present, the period of time during which CO ₂ application is carried out is several hours from the early morning of sunrise until the ventilation in the greenhouse is carried out, and there is little need for heating with a warmer during this period of time.

In other words, in the conventional carbon dioxide supply device, the time zone in which heating is required and the time zone in which CO ₂ application is required do not match, and therefore, only to obtain CO _{2 in} a time zone in which heating is unnecessary. It is necessary to operate the warmer, and the precious fuel that should be consumed for the original heating is consumed wastefully, causing a problem that goes against energy saving. In summer, it is warm even at night, and it is often unnecessary to raise the temperature in the greenhouse with a heater, and there is a problem that fuel costs increase by burning fossil fuel only for CO ₂ application. there were.

  The present invention has been made based on such a background, and can effectively supply carbon dioxide necessary for photosynthesis to horticultural crops, and can obtain high quality horticultural crops. An object of the present invention is to provide a carbon dioxide supply method and supply device for greenhouses for horticultural horticulture, which can greatly reduce the amount of fuel consumption required for the purpose, and have a high energy saving effect.

In order to achieve the above object, a carbon dioxide supply device for greenhouses for horticultural use according to the present invention includes a carbon dioxide absorbing means that contains a carbon dioxide absorbent and absorbs and stores carbon dioxide, and an absorption and storage process by the carbon dioxide absorbing means. A supply passage for supplying air or combustion exhaust gas to the carbon dioxide absorber and supplying air or combustion exhaust gas absorbed with carbon dioxide to a greenhouse, and air or combustion exhaust gas containing carbon dioxide through the ventilation passage A blowing means for blowing air to the carbon dioxide absorbing means, a heating means for heating the carbon dioxide absorbing material to release carbon dioxide, and in the carbon dioxide releasing process by the heating means, air blown by the blowing means is And bypass the carbon dioxide absorbing means from the primary side to the secondary side without passing through the carbon dioxide absorbing means. A bypass passage provided in parallel with the serial air passage, characterized in that it comprises a switching valve for switching a passage of air blown by the blowing means and the bypass passage and the air passage.

According to the carbon dioxide supply device for greenhouses for horticulture according to the present invention, carbon dioxide that absorbs and stores carbon dioxide (CO ₂ ) contained in air or exhaust gas, while releasing carbon dioxide as necessary. Since the absorption means are provided, it becomes possible to set the time zone to apply carbon dioxide separately from the time zone that requires heating, effectively making the carbon dioxide necessary for photosynthesis optimal for horticultural crops High quality horticultural crops can be obtained. In addition, precious fossil fuel or the like is not burned only for producing carbon dioxide to be applied, and the fuel cost is reduced and the energy saving effect can be enhanced.

Next, an embodiment of the carbon dioxide supply device for greenhouses for horticultural use according to the present invention will be specifically described below with reference to the accompanying drawings.

[Example 1]
FIG. 1 and FIG. 2 are block diagrams showing the system configuration of a supply apparatus for carrying out the carbon dioxide supply method for a greenhouse for horticulture according to the present invention and the operation method thereof. FIG. 1 shows an operation method in summer when the heater is not operated, and is divided into a carbon dioxide (carbon dioxide) absorption process (FIG. 1 (a)) and a release process (FIG. 1 (b)). Yes.

  On the other hand, FIG. 2 shows an operation method in the winter season in which the heater is operated, and shows a carbon dioxide absorption process (FIG. 2A) and a discharge process (FIG. 2B) separately.

  A carbon dioxide supply device 1 for greenhouses for horticultural use shown in FIGS. 1 and 2 contains carbon dioxide absorbing means 3 that contains lithium composite oxide as a carbon dioxide absorbent 2 and absorbs and stores carbon dioxide, and carbon dioxide. It comprises air blowing means 4 for blowing air or combustion exhaust gas to the carbon dioxide absorbing means 3, and a heater as heating means 5 for heating the carbon dioxide absorbing material 2 and releasing carbon dioxide into the greenhouse. Is done. Further, each carbon dioxide supply device 1 is provided with a heater (a heater) 6 for heating the inside of the greenhouse in winter.

That is, the system shown in FIG. 1 and FIG. 2 is basically composed of the warmer 6 and the CO ₂ supply device 1, but as shown in FIG. In addition, it is configured to supply fuel to the greenhouse with air that has been sprinkled with fuel only during the cold season of winter. The CO ₂ supply device 1 has a built-in carbon dioxide absorbent 2 mainly containing a lithium composite oxide. The absorbent 2 absorbs CO ₂ based on the reaction shown in the following formula (1), or Or release.
[Equation 1]
Li ₄ SiO ₄ + CO ₂ ⇔Li ₂ SiO ₃ + Li ₂ CO ₂ + Q (1)

This reaction is a reversible reaction, and when heated to about 650 ° C., CO ₂ is released by the reverse reaction, and the absorbent material can be reused. Due to the chemical enthalpy change accompanying the reaction, the reaction in the right direction is an exothermic reaction, and the reaction in the left direction is an endothermic reaction. The CO ₂ absorbing temperature range of this absorbent material is from room temperature to 600 ° C., and the CO ₂ supply device 1 of the greenhouse for horticulture is constructed using this feature.

The CO ₂ supply device 1 configured as described above is operated as follows. That is, in the summer when heating by the heater 6 is not required as shown in FIG. 1 (a), carbon dioxide contained in the atmosphere inside and outside the greenhouse is taken in as a CO ₂ source, and the equation (1) The CO ₂ is absorbed and accumulated in the CO ₂ absorbent 2 by the reaction in the right direction.

When supplying CO ₂ to the greenhouse in summer, as shown in FIG. 1B, the CO ₂ absorbent 2 is heated to a predetermined temperature by a heater 5 as a heating means to release CO _2, and the released CO ₂ is discharged. Dilute ₂ with air and send CO ₂ rich air into the greenhouse.

On the other hand, in the winter season, as shown in FIG. 2 (a), the warmer 6 for greenhouse heating is operated, so that the exhaust gas from the warmer 6 containing CO ₂ having a higher concentration than air is used as CO _2. Absorb and store as a source. As a characteristic of the CO ₂ absorbent 2 made of the lithium composite oxide, the CO ₂ absorption rate is fast at a high concentration and high temperature, and a sufficient amount of CO ₂ can be absorbed and stored in a short time operation.

When supplying CO ₂ into the greenhouse in winter, as shown in FIG. 2B, the CO ₂ absorbent 2 is heated to a predetermined temperature by a heater 5 as heating means, as in the summer shown in FIG. 1B. To release CO ₂ and dilute with air to send CO ₂ rich air into the greenhouse.

3 and 4, respectively show a typical example of operation diagram over one day and night of the CO ₂ supply device 1 in summer and winter (24 hours), the time variation of the amount of sunshine in order from the top of each figure, the CO ₂ storage amount And the time change of the average concentration of CO ₂ in the greenhouse.

In the case of the summer driving diagram shown in FIG. 3, assuming that the sunrise is 6 o'clock and the sunset is 18 o'clock, the greenhouse is ventilated from 6 o'clock for a certain horticultural crop as shown in the middle diagram of FIG. the CO ₂ may be supplied to the time zone of a few hours up to. Takes in air in FIG. 3 at night (22:00 pm to 3), although the operation of absorbing accumulated CO ₂ contained in the atmosphere absorber 2, select the time zone is not supplied CO ₂ It is also possible to appropriately change the time period for absorption. CO ₂ is thought to be most depleted during the time period from sunrise to the time of ventilating the greenhouse. By executing CO ₂ application during this time, the average concentration of CO _{2 in} the greenhouse is within the possible range of photosynthesis. It can be controlled to always exceed the lower limit of.

On the other hand, in the winter driving diagram shown in FIG. 4, for the horticultural crops cultivated in the greenhouse where there is sunshine in the time zone from 7:00 to 16:00 and no open ventilation is performed, the diagram shown in the middle of FIG. Apply CO ₂ from sunrise to sunset. In order to keep the temperature in the greenhouse constant from evening (around 18:00) to early morning (around 7:00) when the inside of the greenhouse cools down, the heater 6 was operated intermittently as shown in the diagram in the middle of FIG. Then, the absorbent ₂ that has absorbed CO ₂ by effectively using the exhaust gas follows a CO ₂ accumulation amount curve as shown in the middle of FIG. If such operation is carried out, the average concentration of CO _{2 in} the greenhouse will not fall below the lower limit of the photosynthesizable range, and CO _{2 is} applied during the daylight hours when heating is not necessary. It is not necessary to burn the precious fuel and operate the heater 6.

According to the carbon dioxide supply method and supply apparatus for greenhouses for horticulture according to the first embodiment, CO ₂ contained in the atmosphere or the exhaust gas of the warmer is absorbed and accumulated, and the optimum time zone is obtained. In addition, effective CO ₂ application that supplies CO ₂ to the greenhouse can be expected to nurture high-quality horticultural crops, and energy saving in the field of horticulture can be realized.

That is, since carbon dioxide absorbing means 3 that absorbs and stores carbon dioxide (CO ₂ ) contained in air or exhaust gas and releases carbon dioxide as necessary is provided, it is a time zone in which heating is required. In addition to this, it is possible to set the time zone for applying carbon dioxide, effectively supplying the carbon dioxide necessary for photosynthesis to the horticultural crops in the optimal time zone, and obtaining high-quality horticultural crops. . In addition, precious fossil fuel or the like is not burned only for producing carbon dioxide to be applied, and the fuel cost is reduced and the energy saving effect can be enhanced.

Note in the above embodiment, the positional relationship between the blower means 4 and CO ₂ absorption means 3, primary CO ₂ absorption means 3 consisting of CO ₂ absorbing material 2 and a heater 5 which as shown in FIG. 5 (a) it is also possible to configure by arranging the push-type blowers -4a the side, the secondary side of the CO ₂ absorption means 3 consisting of CO ₂ absorbing material 2 and a heater 5 which as shown in FIG. 5 (b) It is also possible to arrange the suction type blower-4b.

In the CO ₂ absorption process, as shown in FIG. 5A, carbon dioxide in the air or exhaust gas supplied to be pushed into the CO ₂ absorbing means 3 by the push-type blower 4a is absorbed and accumulated by the CO ₂ absorbent 2. Meanwhile, air or exhaust gas from which carbon dioxide has been removed is supplied to the greenhouse. Further, as shown in FIG. 5B, the carbon dioxide in the air or exhaust gas supplied so as to be sucked into the CO ₂ absorbing means 3 by the suction type blower 4b is absorbed and accumulated by the CO ₂ absorbent 2. Then, air or exhaust gas from which carbon dioxide has been removed is supplied to the greenhouse.

On the other hand, in the CO ₂ releasing process, as shown in FIG. 6A, the air supplied to be pushed into the CO ₂ absorbing means 3 by the pushing type blower 4 a and the heating of the CO ₂ absorbent 2 by the heater 5. CO ₂ enriched air is supplied to the greenhouse is mixed with carbon dioxide gas which is released by. Further, as shown in FIG. 6B, air supplied so as to be sucked into the CO ₂ absorbing means 3 by the suction type blower 4b, and carbon dioxide gas released by the heating of the CO ₂ absorbent 2 by the heater 5 Are mixed to supply CO ₂ rich air to the greenhouse.

Thus example CO ₂ supply device according to 1, heating the CO ₂ absorbing material 2, and the blower as blower means 4 for blowing exhaust gas discharged from the air or heating unit, a CO ₂ absorber 2 The CO ₂ absorbent 2 and the blower 4 are connected by an appropriate pipe or duct. The CO ₂ supply device 1 can absorb, store, and release CO ₂ as long as it includes these devices.

[Example 2]
7 and 8 are cross-sectional views showing the main part of another embodiment of the CO ₂ supply device according to the present invention and its operation. That is, in the CO ₂ supply device according to the second embodiment, the carbon dioxide absorbing means 3a supplies air or combustion exhaust gas to the carbon dioxide absorbent 2 in the carbon dioxide absorption process, and the air or combustion exhaust gas absorbed with carbon dioxide. A bypass passage 8 for supplying air to the greenhouse, and a bypass passage 8 for bypassing the air blown in the carbon dioxide release process from the primary side to the secondary side of the carbon dioxide absorbing means 3a without passing through the carbon dioxide absorbent 2 It is comprised so that it may comprise. That is, the bypass passage 8 is provided in parallel with the portion of the blower passage 7 that includes the carbon dioxide absorbent 2. Further, a switching valve 9 is provided at a portion where the air passage 7 branches from the bypass passage 8 so that these passages can be switched depending on the operation process.

By the way, when the configuration in which the entire amount of air or exhaust gas supplied and ventilated by the blowing unit 4 to the CO ₂ absorbing unit 3 passes through the CO ₂ absorbent 2 as in the carbon dioxide supply device according to the first embodiment is adopted. In the process of releasing carbon dioxide, the CO ₂ absorbent 2 is maintained at a high temperature of 650 ° C. to maintain a high release efficiency, and the heat required for the release reaction is large enough to be supplied by convection of heated air. Heater is required, and power consumption is also increased. Therefore, there is a risk that the operating cost due to the amount of power used will increase significantly.

Therefore, as shown in FIGS. 7 and 8, paths (passages) through which air flows in the carbon dioxide absorption process and the discharge process are provided separately. In the carbon dioxide absorption process, as shown in FIG. 7, the entire amount of air or exhaust gas sent from the blower 4 is vented to the CO ₂ absorbent 2 with the bypass passage 8 closed by the switching valve 9. The carbon dioxide gas contained in the gas is absorbed and accumulated in the CO ₂ absorbent 2. On the other hand, in the carbon dioxide gas release process, as shown in FIG. 8, the air passage 7 toward the CO ₂ absorbing means 3a is closed by the switching valve 9, while the bypass passage 8 is opened. And the air sent out from the ventilation means 4 is not passed through the CO ₂ absorbent 2, but is supplied to the secondary side of the CO ₂ absorbent 3a through the bypass passage 8. Since the passage switching valve is not provided at the portion where the bypass passage 8 joins the blower passage 7, the air supplied to the secondary side of the CO ₂ absorbing means 3 a through the bypass passage is released by the heating of the heater 5. Diluted CO ₂ is used as application gas.

In this case, the heat transfer form to the CO ₂ absorbent 2 in the process of releasing carbon dioxide is mainly heat conduction in the packed bed of the absorbent 2, so that the packed bed is once heated to a high temperature up to 650 ° C. In this case, since only heat supply with heat radiation and reaction heat is required thereafter, the heat supply cost is greatly reduced. Further, since there is no fear that the CO ₂ absorbent 2 is cooled by a large amount of air at a low temperature, the CO ₂ release efficiency is not lowered in the release process, and effective CO ₂ application is possible. .

Note that FIG. 5 and FIG. 6, in the FIGS. 7 and 8, although the arrangement of the CO ₂ absorbing material 2 is different than O by vertically or horizontal, place the monitor or the orientation of the CO ₂ absorbing material 2 is no the present invention For example, even if the CO ₂ absorbent 2 shown in FIG. 5 is disposed obliquely or the CO ₂ absorption / release system shown in FIG. 7 is inverted, there is no significant difference in their functions. .

[Example 3]
FIGS. 9 and 10 are cross-sectional views showing the principal part of another embodiment of the CO ₂ supply device according to the present invention and the operation thereof, and the following conveyance is carried out in the configuration of the embodiment 2 shown in FIGS. An air passage is further added. That is, the CO ₂ supply device for greenhouses for horticultural use according to the third embodiment guides carbon dioxide (carbon dioxide) released from the carbon dioxide absorbent 2 toward the greenhouse and assists its transportation in the carbon dioxide release process. It is configured to include a carrier air passage 10 through which air flows.

When the CO ₂ absorbing material 2 from the CO ₂ is released, CO ₂ partial pressure in the air gap of the packed bed filled with CO ₂ absorbing material 2 is increased. Experimental results have shown that this increase in CO ₂ partial pressure reduces the release reaction rate. Therefore, it is effective to take measures to quickly remove generated CO ₂ .

That is, as shown in FIGS. 9 and 10, a carrier air passage (carrier gas passage) 10 is branched from the bypass passage 8, and the other end of this carrier air passage is the secondary surface portion of the CO ₂ absorbent 2. Is open. A small amount of air that branches from the bypass path 8 and flows through the carrier air path 10 flows as a carrier gas through the surface layer of the CO ₂ absorbent 2. At this time, the carrier gas is quickly transported CO ₂ generated by moving stream, the effect of lowering the partial pressure of CO ₂ in the surface layer of the CO ₂ absorbing material 2 is obtained. Therefore, it is possible to prevent the CO ₂ partial pressure in the voids of the packed bed filled with the CO ₂ absorbent 2 from increasing, and the carbon dioxide gas release efficiency can be maintained high.

[Example 4]
FIG. 11A is a cross-sectional view of the main part showing another embodiment of the CO ₂ supply device according to the present invention, and a carrier gas preheating function is added to the configuration of the embodiment 3 shown in FIG. It is principal part sectional drawing which shows the structure of done Example 4. That is, the CO ₂ supply device for a greenhouse for horticulture according to the fourth embodiment is a preheating unit that preheats the air that assists the transportation of the carbon dioxide released from the carbon dioxide absorbent 2 by the heating unit 5 in the carbon dioxide release process. 11 is configured.

The preheating means 11 shown in FIG. 11 (a) is composed of a container 12 packed with a CO ₂ absorbent 2 and a heater 13 as shown in FIG. 11 (b). The bottom surface of the container 12 has a structure in which a mesh material 14 finer than the particle diameter of the CO ₂ absorbent 2 is disposed, and the carrier gas can be easily passed. In addition, as shown in FIG. 11C, the heater 13 distributes the carrier gas over the entire surface of the heater block 17, for example, with a heater block 17 having a predetermined number of insertion holes 16 through which the cartridge heater 15 is inserted. And a manifold 19 is formed. Since a large number of through holes 18 through which the carrier gas flows are opened in the thickness direction of the heater block 17, the carrier gas from below can be easily passed and the carrier gas can be sufficiently preheated. Since the heater block 17 is in contact with the container 12, heat can be efficiently transferred to the internal CO ₂ absorbent ₂ by heat conduction.

In the case of the CO ₂ absorbing means 3a shown in no 9 preheating means, until the carrier gas reaches the surface of the CO ₂ absorbing material 2 is substantially ambient temperature, lowering the temperature of the CO ₂ absorbent material And may inhibit CO ₂ release. However, according to the CO ₂ supply device according to the fourth embodiment to which the carrier gas preheating means 11 as shown in FIG. 11 is added, the carbon dioxide released from the carbon dioxide absorbent 2 is transported in the carbon dioxide releasing process. the to and a preheating means 11 for preheating air (carrier gas) to assist, can maintain a high emission efficiency of CO ₂ without the temperature of the CO ₂ absorbing material 2 by the carrier gas is lowered.

[Example 5]
FIG. 12A is a cross-sectional view of an essential part showing another embodiment of the CO ₂ supply device according to the present invention, and is configured to include a preheating means 11a different from the preheating means 11 shown in FIG. FIG. 10 is a cross-sectional view of a main part showing the configuration of Example 5.

The preheating means 11a shown in FIG. 12 (a) includes a container 12 packed with a CO ₂ absorbent 2 and a heater 13 as shown in FIG. 12 (b), and a container 12 as shown in FIG. 12 (c). It is comprised from the manifold 19a arrange | positioned at the side surface. Several perforated pipes 20 extending from the manifold 19a to the inside of the container 12 are disposed. The carrier gas is evenly distributed in the CO ₂ absorbent ₂ by the perforated pipe 20. The manifold 19a is sufficiently heated because it is integrated or in close contact with the container 12, and the carrier gas passing through the interior of the manifold 19a is also effectively heated. Accordingly, Example 4 to be able to maintain a high emission efficiency of CO ₂ without the temperature of the CO ₂ absorbing material 2 is lowered as well by the carrier gas.

  In addition, although illustration is abbreviate | omitted, in addition to the said structure, the said perforated pipe | tube may be bend | folded 1-2 and it may be stretched around the container 12 bottom part, and a preheating means may be comprised. Further, the perforated pipe may be integrated with the heater block. In addition, although a heater and a container are rectangular parallelepipeds, even if it is a cylindrical shape, a problem does not arise in particular.

When the aspects of Examples 1 to 5 are summarized, as a minimum configuration, the CO ₂ absorbent 2, the air blowing means (blower) 4 for blowing air or the exhaust gas of the warmer, and the CO ₂ absorbent 2 If the heating means (heater) 5 for heating is provided, the CO ₂ supply device of each embodiment can be realized. In order to suppress the power consumption and capacity of the heater 5, a bypass passage for the discharge process may be added.

In order to generate and release CO ₂ more efficiently, a method for quickly removing CO ₂ using a carrier gas or a mechanism for preheating the carrier gas by a combination of the heater 5 and the CO ₂ absorbent container 12 may be provided. According to the present embodiment, it is possible to provide a CO ₂ supply device for greenhouses for horticulture that is highly efficient and energy saving is improved.

[Example 6]
FIGS. 13 and 14 are cross-sectional views showing the principal parts of another embodiment of the CO ₂ supply device according to the present invention. The following flow rate adjusting means is added to the configuration of the embodiment 3 shown in FIGS. In addition. That is, the CO ₂ supply device for a greenhouse for horticulture according to Example 6 supplies air or combustion exhaust gas to the carbon dioxide absorbent 2 in the carbon dioxide absorption process, and the air or combustion exhaust gas absorbed by carbon dioxide to the greenhouse. The air supply passage 7 to be supplied and the bypass air passage 10 that bypasses the carbon dioxide absorbing material 2 from the primary side to the secondary side without passing through the carbon dioxide absorbing material 2. Of the two passages, the bypass passage 10 is provided with a damper as flow rate adjusting means 21 for adjusting the flow rate of air or combustion exhaust gas.

In the CO ₂ supply device according to the third embodiment in which the switching valve 9 is used to open and close the air passage 7 and the bypass passage 8 as shown in FIGS. 9 and 10, in the carbon dioxide gas absorption process and the discharge process, The passages through which air or exhaust gas flows are different, and one of the blower passage 7 and the bypass passage 8 has to be closed.

  However, according to the sixth embodiment, as shown in FIGS. 13 and 14, by providing one damper as the automatic or manual flow rate adjusting means 21 in the bypass path 8, the flow path can be easily switched. .

In the sixth embodiment, in the carbon dioxide absorption process, as shown in FIG.
Is closed and all the air / exhaust gas is passed through the CO ₂ absorbent 2. On the other hand, in the CO ₂ releasing process, as shown in FIG. 14, the damper 21 is opened, air is drawn into the bypass passage 8, and a small amount of air is also sent into the carrier gas passage 10. One damper can also be provided in the main path (air passage 7).

[Example 7]
FIGS. 15 and 16 are cross-sectional views showing the principal parts of another embodiment of the CO ₂ supply device according to the present invention. The following flow rate adjusting means is added to the configuration of the embodiment 2 shown in FIGS. In addition. That is, the CO ₂ supply device for a greenhouse for horticulture according to the seventh embodiment includes dampers 21 a and 21 b as flow rate adjusting means 21 for adjusting the flow rate of air or combustion exhaust gas in both the air passage 7 and the bypass passage 8. It is provided and configured. In other words, the dampers are disposed at two locations of the air passage 7 and the bypass passage 8 as main passages.

In the seventh embodiment configured as described above, in the carbon dioxide gas absorption process, as shown in FIG. 15, the main path damper 21a is fully opened, while the bypass damper 21b is fully closed, so that all air / exhaust gas is absorbed by CO _2. Pass through material 2. On the other hand, in the carbon dioxide gas release process, as shown in FIG. 16, the bypass damper 21b is fully opened and used as dilution air. On the other hand, the main path damper 21a is opened slightly to allow air to flow and can be used as a carrier gas. .

When the above Examples 6 to 7 are summarized, a flow rate adjusting mechanism such as a damper or a flow rate adjusting means capable of opening and closing the passage is arranged in either or both of the blower passage (main route) and the bypass passage 8. It is possible to provide a CO ₂ supply device for a greenhouse for horticulture that allows easy switching of exhaust gas.

[Example 8]
FIG. 17 is a cross-sectional view of an essential part showing another embodiment of the CO ₂ supply device according to the present invention, in which the CO ₂ absorbing means 3b includes a plurality of CO ₂ absorbents 2a, 2b, 2c and a plurality of heaters 5a, 5b. 5c. That is, the CO ₂ supply device for greenhouses for horticulture according to the eighth embodiment includes the carbon dioxide absorbents 2a, 2b, and 2c and the heating for heating the carbon dioxide absorbents 2a, 2b, and 2c to release carbon dioxide. A plurality of combinations with heaters 5a, 5b, and 5c as means are provided.

Here, the CO ₂ release reaction rate in the carbon dioxide release process is much faster than the absorption rate. Therefore, as shown in Examples 1-3, with CO ₂ supply device combining one heater 5 with respect to CO ₂ absorbing material 2 of the lump is at once CO from CO ₂ absorbing material 2 that has been heated to the reaction temperature _{results 2} from being released, there is a difficult to uniformly emit carbon dioxide over a long time, which is any case difficult also to accurately control the discharge amount of carbon dioxide gas problem. As for the heat loss due to heat dissipation from the CO ₂ absorbing material 2, in the case of uniformly heating the CO ₂ absorbing material 2, the thermal loss increases problems from the completion of the reaction portion of the CO ₂ absorbing material 2 there were.

However, as shown in FIG. 17, a combination of a plurality of CO ₂ absorbents 2a, 2b, and 2c formed in a disk shape and heaters 5a, 5b, and 5c attached to the outer periphery of the CO ₂ absorbents 2a, 2b, and 2c If a plurality of heaters 5a, 5b, 5c are individually provided, it is possible to individually control the energization amount of the heaters 5a, 5b, 5c, and there is no risk of CO ₂ being released from the CO ₂ absorbents 2a, 2b, 2c all at once. It becomes possible to discharge carbon dioxide evenly over a long time.

FIG. 18 shows the amount of electricity supplied to the heaters 5a, 5b, and 5c individually for sequentially heating the three carbon dioxide absorbers 2a, 2b, and 2c of the CO ₂ supply device according to Example 8 to release carbon dioxide. It is the graph which shows the time fluctuation of the driving | running diagram to control and the discharge | release density | concentration of the carbon dioxide gas discharge | released in a greenhouse.

As is clear from the results shown in FIG. 18, the CO ₂ absorbent is divided into small portions, while the heaters attached to the divided CO ₂ absorbents are controlled so as to be sequentially energized individually, thereby dividing the divided CO ₂ absorbent. ₂ Carbon dioxide gas can be sequentially released from the absorbent material, CO ₂ can be released over a long period of time, and heating and heat loss in other absorbent material parts not involved in the release reaction are reduced, resulting in an energy saving effect. . In Example 8 shown in FIG. 17 shows the case of providing three of the combination of CO ₂ absorbent material and a heater, effect of two can be expected. Of course, if the number is four or more, the cost is increased, but the function is further improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows one Example of the carbon dioxide supply apparatus of the greenhouse for horticulture which concerns on this invention, and shows the structure in the summer which does not operate a heater, (a) shows the operation | movement in the absorption process of a carbon dioxide gas (B) is a block diagram which shows the operation | movement in the discharge | release process of a carbon dioxide gas. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows one Example of the carbon dioxide supply apparatus of the greenhouse for greenhouses for horticulture concerning this invention, and shows the structure in the winter season which operates a heating machine, (a) shows the operation | movement in the absorption process of a carbon dioxide gas (B) is a block diagram which shows the operation | movement in the discharge | release process of a carbon dioxide gas. The graph which shows the driving | running diagram of the summer in the carbon dioxide supply apparatus of the greenhouse for greenhouses. The graph which shows the driving diagram in the winter in the carbon dioxide supply apparatus of greenhouses for horticulture. Is a side view showing the positional relationship between the CO ₂ absorbent material in the carbon dioxide supply apparatus horticulture for greenhouses and blowing means, (a) shows the structure and absorption process in which a blower means to the primary side of the CO ₂ absorbent material shows the effect of in, (b) is a side view showing the operation of the configuration and absorption process in which a blowing means on the secondary side of the CO ₂ absorber. It is a side view which shows the effect | action of the carbon dioxide release process in the carbon dioxide supply apparatus shown in FIG. 5, (a) is a side view which shows the effect | action of the carbon dioxide release process in the apparatus shown in FIG. ) Is a side view showing the action of the carbon dioxide gas releasing process in the apparatus shown in FIG. Sectional drawing which shows the effect | action of the absorption process of the carbon dioxide supply apparatus which added the bypass channel. Sectional drawing which shows the effect | action of the discharge | release process of the carbon dioxide supply apparatus which added the bypass channel. Sectional drawing which shows the effect | action of the absorption process of the carbon dioxide supply apparatus which added the conveyance air channel | path (carrier gas channel | path). Sectional drawing which shows the effect | action of the discharge | release process of the carbon dioxide supply apparatus which added the conveyance air channel | path (carrier gas channel | path). It is a figure which shows the structure of the carbon dioxide supply apparatus which added the preheating means of carrier gas, (a) is sectional drawing which shows the whole structure of the carbon dioxide supply apparatus which added the said preheating means, (b) is the said preheating. It is a perspective view which shows the structure of a means, (c) is a perspective view which shows the structure of a heater. It is a figure which shows the structure of the carbon dioxide supply apparatus which added the other preheating means of carrier gas, (a) is sectional drawing which shows the whole structure of the carbon dioxide supply apparatus which added the said preheating means, (b) It is a perspective view which shows the structure of the said preheating means, (c) is a perspective view which shows the structure of a container. Sectional drawing which shows the effect | action in the absorption process of the carbon dioxide supply apparatus which added the damper as a flow volume adjustment means. Sectional drawing which shows the effect | action in the discharge | release process of the carbon dioxide supply apparatus which added the damper as a flow volume adjustment means. Sectional drawing which shows the effect | action in the absorption process of the carbon dioxide supply apparatus which added the damper as a flow volume adjustment means. Sectional drawing which shows the effect | action in the discharge | release process of the carbon dioxide supply apparatus which added the damper as a flow volume adjustment means. Cross-sectional view showing the action at emission process of carbon dioxide supply device combined with three arranged to configure the CO ₂ absorbing material and the heating means. The graph which shows the driving | running diagram of the carbon dioxide supply apparatus shown in FIG.

Explanation of symbols

1 Carbon dioxide supply device (CO ₂ supply device)
2, 2a, 2b, 2c Carbon dioxide absorbent (CO ₂ absorbent)
3,3a Carbon dioxide absorption means (CO ₂ absorption means)
4, 4a, 4b Blower (blower)
5, 5a, 5b, 5c Heating means (heater)
6 Heating machine (heating machine)
7 Air passage (main route)
8 Bypass passage 9 Switching valve 10 Carrier air passage (carrier gas passage)
11, 11a Preheating means 12 Container 13 Heater 14 Mesh material 15 Cartridge heater 16 Insertion port 17 Heater block 18 Through hole 19, 19a Manifold 20 Perforated pipes 21, 21a, 21b Flow rate adjusting means (damper)

Claims (4)

A carbon dioxide absorbing means containing a carbon dioxide absorbent and absorbing and storing carbon dioxide;
An air supply passage for supplying air or combustion exhaust gas to the carbon dioxide absorbent in the absorption storage process by the carbon dioxide absorption means, and supplying air or combustion exhaust gas absorbed with carbon dioxide to the greenhouse;
Blower means for blowing air containing carbon dioxide or combustion exhaust gas to the carbon dioxide absorption means through the blow passage,
Heating means for heating the carbon dioxide absorbent to release carbon dioxide;
In the process of releasing carbon dioxide by the heating means, the air blown by the blowing means is arranged in parallel with the blowing passage so as to bypass the carbon dioxide absorbing means from the primary side to the secondary side without passing through the carbon dioxide absorbing means. A bypass passage provided in
A carbon dioxide supply device for greenhouses for horticultural use, comprising: a switching valve for switching a passage of air blown by the blower means to the blower passage and the bypass passage . In the carbon dioxide release process, a carrier air passage branched from the bypass passage and opened in the secondary side surface portion of the carbon dioxide absorbing means is provided, and the carbon dioxide released from the carbon dioxide absorbent by the carrier air passage is carbon dioxide supply apparatus of horticulture for greenhouses as claimed in claim 1, wherein the help induce and its transport to the greenhouse direction by the air blown by the blowing means. 3. The greenhouse for horticultural horticulture according to claim 2 , further comprising preheating means for preheating air for assisting transport of carbon dioxide released from the carbon dioxide absorbent by the heating means in the carbon dioxide releasing process. Carbon dioxide supply device. The greenhouse for horticultural horticulture according to claim 1 , wherein a flow rate adjusting means for adjusting a flow rate of air or combustion exhaust gas is provided in at least one of the air passage and the bypass passage instead of the switching valve. CO2 supply device.

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