JP2019041642A - Carbon dioxide application device - Google Patents

Abstract

To provide a carbon dioxide application device capable of suppressing decrease in liquid level in a liquid storage tank when the adsorption of carbon dioxide is stopped.SOLUTION: There is provided a carbon dioxide application device for supplying carbon dioxide contained in a combustion exhaust gas in an agricultural greenhouse. The carbon dioxide application device comprises at least one liquid storage tank which is configured to store a liquid and pass the combustion exhaust gas through the liquid, a supply passage which is configured to supply the combustion exhaust gas passed through the liquid to the downstream side of the liquid storage tank, a device which is provided in the supply passage and leads the combustion exhaust gas passed through the liquid to the downstream side of the liquid storage tank and an open passage which is configured to release the inside of the at least one liquid storage tank to the atmosphere.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a carbon dioxide application device.

  In order to improve the yield and quality of horticultural plants, carbon dioxide application devices are known which apply carbon dioxide into agricultural houses. On the other hand, the agricultural house is provided with a heater for preventing the temperature decrease at night. A heater burns heavy oil or kerosene to supply warm air to an agricultural house.

  Then, the carbon dioxide application device which recovers and stores the carbon dioxide in the combustion exhaust gas generated from a heating machine, and supplies carbon dioxide to the house for agriculture at arbitrary timing is devised (refer to patent documents 1).

  In this carbon dioxide application device, after the flue gas is allowed to pass through the liquid in the liquid storage tank for cooling, the carbon dioxide in the flue gas is adsorbed by the adsorption tank. The liquid storage tank is provided with a drainage mechanism operated by the pressure in the liquid storage tank in order to keep the internal liquid level constant.

  The carbon dioxide adsorbed to the adsorption tank is desorbed from the adsorption tank, for example, in the daytime, and applied to the agricultural house.

JP, 2015-142531, A

  In the above-mentioned carbon dioxide application device, the combustion exhaust gas is sucked in order to pass the combustion exhaust gas to the liquid in the liquid storage tank and send it to the adsorption tank or the agricultural house, and the combustion exhaust gas passing through the liquid storage tank is used for A device for guiding the inside (so-called aspirator) is provided. This aspirator is operated at the time of adsorption of carbon dioxide, and is stopped at the time of stopping adsorption.

  Since the negative pressure remains in the liquid storage tank after the aspirator is stopped, the drainage mechanism does not operate even if the liquid level rises, and the liquid level can not be maintained.

  One aspect of the present disclosure is to provide a carbon dioxide application device capable of suppressing a liquid level rise in a liquid storage tank when carbon dioxide adsorption is stopped.

  One aspect of the present disclosure is a carbon dioxide application device that supplies carbon dioxide contained in combustion exhaust gas into an agricultural house. The carbon dioxide application device stores the liquid, and supplies at least one liquid storage tank configured to allow the flue gas to pass through the liquid and the flue gas passing through the liquid to the downstream side of the liquid reservoir tank. And a device provided in the feed passage for guiding the combustion exhaust gas having passed through the liquid to the downstream side of the liquid storage tank, and the inside of at least one liquid storage tank can be opened to the atmosphere. And an open channel.

  According to such a configuration, the negative pressure in the liquid storage tank is released by opening the inside of the liquid storage tank to the atmosphere by the open flow path after the operation of the device is stopped. As a result, the drainage mechanism operates normally, and it is possible to suppress the liquid level rise in the liquid storage tank after the operation of the device is stopped.

  One aspect of the present disclosure may include a cooling pipe that supplies cooling air into at least one liquid storage tank as the open flow path. In addition, the cooling pipe may have a through hole communicating with a space above the liquid level of the at least one liquid storage tank while the end is disposed in the liquid in the at least one liquid storage tank . According to such a configuration, since the cooling pipe for cooling the liquid in the liquid storage tank can be used as the open flow path, it is not necessary to provide a new pipe or valve in the liquid storage tank.

  One aspect of the present disclosure may include, as at least one liquid storage tank, a first liquid storage tank, and a second liquid storage tank to which the flue gas that has passed through the first liquid storage tank is supplied. In addition, the carbon dioxide application device may include, as an open flow path, a cooling pipe that supplies cooling air into the first liquid storage tank, and a supply pipe that constitutes a part of the supply flow path. The supply pipe may be connected to an application pipe for supplying carbon dioxide application air, with its end portion being disposed in a space above the liquid level in the second liquid storage tank. According to such a configuration, the cooling pipe can be used as the open flow path in the first liquid storage tank as described above, and the application pipe can be used as the open flow path in the second liquid storage tank. Therefore, while providing the liquid cooling mechanism and the application air supply mechanism, it is possible to suppress the rise in liquid level in each liquid storage tank after the operation of the device is stopped without providing a dedicated pipe as the open flow path.

  In one aspect of the present disclosure, the through hole may constitute a bypass flow path for transferring the cooling air from the cooling pipe to the second liquid storage tank without passing through the liquid in the first liquid storage tank. According to such a configuration, the liquid in the first liquid storage tank and the liquid in the second liquid storage tank are simultaneously cooled by one cooling air channel, and the cooling time of the liquid in these liquid storage tanks is shortened. it can.

FIG. 1 is a block diagram schematically showing a configuration of a carbon dioxide application apparatus in the embodiment.

Hereinafter, embodiments to which the present disclosure is applied will be described using the drawings.
[1. First embodiment]
[1-1. Constitution]
The carbon dioxide application device 1 shown in FIG. 1 is a device for recovering carbon dioxide contained in combustion exhaust gas and supplying the carbon dioxide to the inside of an agricultural house. The carbon dioxide application device 1 is disposed inside or outside of the agricultural house.

The carbon dioxide application device 1 includes a combustion device 2, a first liquid storage tank 3, a second liquid storage tank 4, a blower 5, an adsorption tank 6, a control unit 7, and a heat exchanger 8.
Further, the carbon dioxide application apparatus 1 includes the exhaust gas flow path 10, the first intake flow path 11, the cooling air flow path 12, the second intake flow path 13, the application air flow path 14, and the supply flow path. And 15.

<Combustion device>
The combustion device 2 is a device that burns fuel such as heavy oil or kerosene mainly at night, and warms the air in the agricultural house. The combustion exhaust gas is discharged out of the agricultural house through the exhaust gas flow path 10 which is a chimney.

<First liquid storage tank>
The first liquid storage tank 3 is a device for cooling and purifying a part of the combustion exhaust gas generated from the combustion device 2 with the liquid L.

  The first liquid storage tank 3 stores the liquid L inside. Further, the first liquid storage tank 3 is configured to take in the combustion exhaust gas generated by the combustion device 2 and to allow the taken combustion exhaust gas to pass through the liquid L. The flue gas is cooled by heat exchange with the liquid L, and some of the components contained in the liquid L are removed by the compounds contained in the liquid L. The volume of the liquid L stored in the first liquid storage tank 3 is smaller than the volume of the first liquid storage tank 3.

  Specifically, the first intake channel 11 is connected to the first liquid storage tank 3, and the combustion exhaust gas is supplied from the first intake channel 11 into the liquid L. The first intake passage 11 is connected to the exhaust gas passage 10 and takes in the combustion exhaust gas. The liquid L enters the first intake channel 11 to the same position as the liquid level in the first liquid storage tank 3.

  In FIG. 1, the end of the first intake channel 11 is connected to the lower surface of the first liquid storage tank 3, but the end of the first intake channel 11 is the first liquid storage tank 3. It may be connected to the side of Further, the first intake channel 11 may be disposed so as to open into the liquid L from the upper surface of the first liquid storage tank 3 through the inside of the first liquid storage tank 3. The same applies to the second intake channel 13 of the second liquid storage tank 4 described later.

  The combustion exhaust gas supplied into the liquid L floats up as bubbles in the liquid L. That is, bubbling is performed. The combustion exhaust gas that has passed through the liquid L is taken into the second liquid storage tank 4 by the second intake passage 13.

  The liquid L stored in the first liquid storage tank 3 is preferably one that can remove harmful substances such as sulfides and nitrides contained in the combustion exhaust gas. For example, an aqueous solution of a compound that reacts with sulfide or nitride can be suitably used as the liquid L.

  Further, a drain 17 is provided in the first liquid storage tank 3. The drainage path 17 is a flow path for keeping the liquid level of the liquid L constant by discharging the liquid L to the outside of the first liquid storage tank 3 by the hydraulic pressure when the liquid level of the liquid L rises. is there.

  In the present embodiment, the drainage path 17 is provided with a check valve (that is, a check valve) 17A. If the liquid L can be discharged according to the rise of the liquid level of the liquid L, the drain 17 does not necessarily have to be provided with the check valve 17A.

  A cooling air channel 12 for cooling the liquid L is connected to the first liquid storage tank 3. The cooling air flow path 12 cools the liquid L by supplying cooling air into the liquid L. The cooling air flow path 12 has a cooling pipe 12A and an on-off valve 12B.

  One end of the cooling pipe 12 </ b> A is disposed in the liquid L in the first liquid storage tank 3. The other end of the cooling pipe 12A is directly open to the atmosphere or is open to the atmosphere via a supply source of cooling air (not shown). Further, the cooling pipe 12A has a through hole 12C.

  The through hole 12 </ b> C communicates with the space above the liquid level of the first liquid storage tank 3. That is, in the cooling pipe 12A, the through hole 12C is provided between the upper surface of the first liquid storage tank 3 and the liquid surface. The size of the through hole 12C is not particularly limited as long as the gas flows. For example, the diameter can be 5 mm or more and 20 mm or less.

  The cooling pipe 12A is also used as an open flow path configured to open the inside of the first liquid storage tank 3 to the atmosphere. The through hole 12 </ b> C opens the inside of the first liquid storage tank 3 to the atmosphere by taking in air from the cooling pipe 12 </ b> A into the first liquid storage tank 3.

  The on-off valve 12B is attached in the cooling pipe 12A. The on-off valve 12B is opened at the time of supply of cooling air by the cooling pipe 12A, or at the time of air release in the first liquid storage tank 3 by the cooling pipe 12A. For example, a solenoid valve can be used as the on-off valve 12B. After the operation of the blower 5 is stopped, the on-off valve 12B is opened, so that the inside of the first liquid storage tank 3 is opened to the atmosphere by the cooling pipe 12A.

  The cooling air supplied into the liquid L in the first liquid storage tank 3 is supplied into the liquid L in the second liquid storage tank 4 by the second intake channel 13. That is, the cooling air supplied from the cooling air flow path 12 cools the liquid L in the first liquid storage tank 3 and the liquid L in the second liquid storage tank 4. Further, the through holes 12C constitute a bypass flow path for transferring the cooling air from the cooling pipe 12A to the second liquid storage tank 4 without passing the liquid in the first liquid storage tank 3.

<Second liquid storage tank>
The second liquid storage tank 4 is a device for cooling and purifying the flue gas that has passed through the first liquid storage tank 3 again. That is, the carbon dioxide application device 1 cools and purifies the combustion exhaust gas in two steps.

  The second liquid storage tank 4 stores the same liquid L as the first liquid storage tank 3 inside. Further, the second liquid storage tank 4 is configured so as to take in the combustion exhaust gas that has passed through the first liquid storage tank 3, and the taken combustion exhaust gas passes through the liquid L.

  Specifically, the second intake channel 13 is connected to the second liquid storage tank 4, and the combustion exhaust gas is supplied into the liquid L from the second intake channel 13. The combustion exhaust gas having passed through the liquid L is supplied to the adsorption tank 6 by the supply flow path 15. The second liquid storage tank 4 is provided with a drain 17 similar to the first liquid storage tank 3. The liquid L has entered the second intake flow path 13 to the same position as the liquid level in the second liquid storage tank 4.

  The supply flow path 15 is configured to supply the combustion exhaust gas having passed through the liquid to the inside of the agricultural house or the outside of the agricultural house via the adsorption tank 6 on the downstream side of the liquid storage tank. The supply flow path 15 includes a first supply pipe 15A, a second supply pipe 15B, and a discharge flow path 16. One end of the first supply pipe 15 </ b> A is disposed in a space above the liquid level in the second liquid storage tank 4. The other end of the first supply pipe 15A is connected to a second supply pipe 15B and an application pipe 14A described later. The first supply pipe 15A, together with the application pipe 14A, constitutes an open flow path configured to open the inside of the second liquid storage tank 4 to the atmosphere.

<Blower>
The blower 5 is a device provided in the supply flow path 15 and configured to guide the flue gas passing through the liquid of the first liquid storage tank 3 and the second liquid storage tank 4 to the downstream side of the liquid storage tank. . In the present embodiment, the blower 5 supplies the combustion exhaust gas to the adsorption tank 6, the inside of the agricultural house, and the outside of the agricultural house. The blower 5 is disposed in the second supply pipe 15 B of the supply flow path 15.

  In the carbon dioxide adsorption step, negative pressure is generated in the first liquid storage tank 3 and the second liquid storage tank 4 by the operation of the blower 5, and the combustion exhaust gas generated by the combustion device 2 is the first liquid storage tank 3 and the second liquid storage tank 3. The pressure is sent to the adsorption tank 6 via the liquid storage tank 4.

<Suction tank>
In the adsorption tank 6, an adsorbent that adsorbs carbon dioxide in the combustion exhaust gas is disposed inside. In the carbon dioxide adsorption process, carbon dioxide in the flue gas supplied by the blower 5 is adsorbed by the adsorbent. As an adsorbent, porous materials, such as activated carbon and a zeolite, etc. can be used, for example.

  On the other hand, in the carbon dioxide application process, application air is supplied from the application air flow path 14 into the adsorption tank 6, and carbon dioxide is desorbed from the adsorbent. The desorbed carbon dioxide is applied to the agricultural house through the discharge flow path 16.

  In the present embodiment, the application air flow channel 14 is connected to the supply flow channel 15. Specifically, the application air flow path 14 and the supply flow path 15 share the second supply pipe 15B. Moreover, the application air flow path 14 has the application piping 14A and the on-off valve 14B.

  One end of the application pipe 14A is connected to the second supply pipe 15B. The other end of the application pipe 14A is open to the atmosphere. The application pipe 14A, together with the first supply pipe 15A, constitutes an open flow path configured to be able to open the inside of the second liquid storage tank 4 to the atmosphere.

  Since the inflow pressure of the application air flowing in from the application pipe 14A is smaller than the pressure that depresses the liquid level of the second liquid storage tank 4, the application air is guided to the supply flow path 15.

  The on-off valve 14B is attached in the application pipe 14A. The on-off valve 14B is opened at the time of supply of the application air by the application pipe 14A, or at the time of air release in the second liquid storage tank 4 by the application pipe 14A and the first supply pipe 15A. For example, a solenoid valve can be used as the on-off valve 14B. After the operation of the blower 5 is stopped, the on-off valve 14B is opened, whereby the inside of the second liquid storage tank 4 is opened to the atmosphere by the application pipe 14A.

<Heat exchanger>
The heat exchanger 8 is provided in the first intake channel 11 and cools the flue gas in the first intake channel 11 supplied to the first liquid storage tank 3. The refrigerant in the heat exchanger 8 is not particularly limited.

  In the flow path of the combustion exhaust gas in the heat exchanger 8, condensed water is generated by cooling. The condensed water flows in the first intake channel 11 and is accumulated in the first liquid storage tank 3. Excess water accumulated in the first liquid storage tank 3 is drained by the check valve 17A of the drainage passage 17 in order to keep the fluid pressure constant.

<Control unit>
The control unit 7 is a device that controls the operation of the carbon dioxide application device 1. Specifically, the control unit 7 controls the operation and stop of the blower 5, the opening and closing of the solenoid valve, and the like.

[1-2. effect]
According to the embodiment described above, the following effects can be obtained.
(1a) The negative pressure in each liquid storage tank is released by opening the inside of the first liquid storage tank 3 and the second liquid storage tank 4 to the atmosphere by the respective open flow paths after the operation of the blower 5 is stopped. As a result, the drainage channel 17 in each liquid storage tank operates normally, and the rise in liquid level in the first liquid storage tank 3 and the second liquid storage tank 4 after the operation of the blower 5 is stopped can be suppressed.

  (1b) Since the cooling pipe 12A for cooling the liquid L in the first liquid storage tank 3 can be used as an open flow path, it is not necessary to provide a new pipe or valve in the first liquid storage tank 3. Further, in the second liquid storage tank 4, the application pipe 14A can be used as an open flow path. Therefore, while providing the cooling mechanism of the liquid L and the supply mechanism of the application air, it is possible to suppress the rise in liquid level in each liquid storage tank after the operation of the blower 5 is stopped without providing a dedicated pipe as the open flow path.

[2. Other embodiments]
As mentioned above, although embodiment of this indication was described, it can not be overemphasized that this indication can take various forms, without being limited to the above-mentioned embodiment.

  (2a) In the carbon dioxide application device 1 of the above embodiment, the number of liquid storage tanks for storing the liquid L may be one. Moreover, the carbon dioxide application apparatus 1 may be equipped with three or more liquid storage tanks.

  (2b) In the carbon dioxide application apparatus 1 of the above embodiment, the first liquid storage tank 3 may be provided with an open pipe independent of the cooling pipe 12A, and the open pipe may be configured by the open pipe. In addition, the second liquid storage tank 4 may be provided with an open pipe independent of the application pipe 14A and the first supply pipe 15A to configure an open flow path. The open pipe may be connected at one end to a position above the liquid level of the first liquid storage tank 3 or the second liquid storage tank 4 and open at the other end to the atmosphere.

  (2c) In the carbon dioxide application apparatus 1 of the above embodiment, an auxiliary pipe may be connected to the through hole 12C of the cooling pipe 12A. One end of the auxiliary pipe is connected to the through hole 12C, and the other end is disposed in a space above the liquid level of the first liquid storage tank 3. Further, the auxiliary piping may be connected to the outside of the first liquid storage tank 3 and the atmosphere may be opened by the through hole 12C.

  (2d) In the carbon dioxide application device 1 of the above embodiment, the flue gas passing through the liquid storage tank may be supplied directly into the agricultural house by the blower 5.

  (2e) The function of one component in the above embodiment may be distributed as a plurality of components, or the function of a plurality of components may be integrated into one component. In addition, part of the configuration of the above embodiment may be omitted. In addition, at least a part of the configuration of the above-described embodiment may be added to or replaced with the configuration of the other above-described embodiment. In addition, all the aspects contained in the technical thought specified from the wording as described in a claim are an embodiment of this indication.

1 ... carbon dioxide application device, 2 ... combustion device, 3 ... first liquid storage tank,
4 ... 2nd liquid storage tank, 5 ... blower, 6 ... adsorption tank, 7 ... control unit, 8 ... heat exchanger,
10 exhaust gas flow path 11 first intake flow path 12 cooling air flow path 12A cooling piping
12B: opening and closing valve, 12C: through hole, 13: second intake passage, 14: application air passage,
14A: application piping, 14B: on-off valve, 15: supply flow path, 15A: first supply piping,
15B: second supply piping, 16: discharge flow path, 17: drainage path, 17A: check valve.

Claims (4)

A carbon dioxide application apparatus for supplying carbon dioxide contained in combustion exhaust gas into an agricultural house, comprising:
At least one liquid storage tank configured to store liquid, and the flue gas is configured to pass through the liquid;
A supply flow passage configured to supply the combustion exhaust gas having passed through the liquid to the downstream side of the liquid storage tank;
A device provided in the supply flow channel for guiding the combustion exhaust gas having passed through the liquid to the downstream side of the liquid storage tank;
An open channel configured to be open to the atmosphere in the at least one liquid storage tank;
Equipped with a carbon dioxide application device. It is a carbon dioxide application device according to claim 1,
The open channel includes a cooling pipe for supplying cooling air into the at least one liquid storage tank,
The cooling pipe has an end disposed in the liquid in the at least one liquid storage tank, and has a through hole communicating with a space above the liquid level of the at least one liquid storage tank. Carbon application device. The carbon dioxide application apparatus according to claim 2,
The at least one liquid storage tank includes a first liquid storage tank, and a second liquid storage tank to which the combustion exhaust gas having passed through the first liquid storage tank is supplied.
As the open flow path, the cooling pipe for supplying cooling air into the first liquid storage tank, and a supply pipe that constitutes a part of the supply flow path,
The feed pipe is connected to an application pipe having an end portion disposed in a space above the liquid surface in the second liquid storage tank and supplying carbon dioxide application air. It is a carbon dioxide application device according to claim 3,
The carbon dioxide application device, wherein the through hole forms a bypass flow path for transferring cooling air from the cooling pipe to the second liquid storage tank without passing through the liquid in the first liquid storage tank.

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