JP2000061302A - Apparatus for discharging carbon dioxide for dilution in the sea - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for discharging carbon dioxide for dilution in the sea, in which the dilution ratio of liquefied carbon dioxide discharged, dissolved and diluted in the sea from a discharging pipe, is raised by increasing the volume of seawater to dissolve the carbon dioxide. SOLUTION: In this apparatus for discharging carbon dioxide, in which liquefied carbon dioxide 6 is fed into a discharging pipe 4 dangled from a ship 3 and towed during sailing and is discharged into the sea through discharging holes 12 provided on the discharging pipe 4, the discharging pipe 4 is equipped with a pipe extending in the direction crossing the sailing course of the ship 3, and plural discharging holes 12 are provided in line on this pipe. This pipe is connected flexibly with an upper section so as to be able to rotate, and this pipe is equipped with guide members which work toward making the direction of this pipe cross, at the center of the pipe, the sailing course of the ship.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for diluting and releasing carbon dioxide, which releases the recovered carbon dioxide into the sea and dissolves it in seawater.

[0002]

BACKGROUND ART Recently, has a global warming is a big problem, the carbon dioxide (CO ₂₎ having a greenhouse effect which is pointed out that there is a possibility of causing global climate change due to this It has become particularly important to suppress the increase in concentration in the atmosphere. Then, as one of the countermeasures, there has been proposed a concept of separating carbon dioxide from the atmosphere for a long period by collecting carbon dioxide in combustion exhaust gas discharged from a thermal power plant and sending it to the ocean. To achieve this, it is necessary to prevent new environmental impacts from occurring in the ocean into which carbon dioxide is sent.

The following two types of systems have been proposed as systems for reducing the influence of carbon dioxide feeding on the marine environment. One of them is called the savings type, which is a method of concentrating and storing carbon dioxide in a place such as a depression on the deep sea floor to limit the affected area to a specific place and localize it.

Another system is called a dissolution-diffusion type, in which carbon dioxide is dissolved in seawater, diluted thinly and widely diffused to suppress an increase in carbon dioxide concentration in seawater. This method is based on the idea that the concentration of carbon dioxide, which is originally dissolved in seawater, rises only to some extent.

As a concrete method of this dissolution diffusion type, there is a middle-layer dilution release system in which a release point of carbon dioxide is moved by a ship to release carbon dioxide in the middle layer in the sea. This method will be described with reference to FIGS. FIG. 8 is an explanatory view schematically showing a system of a middle-layer dilution discharge system, and FIG. 9 (a) is an explanatory view schematically showing a state in which carbon dioxide is discharged and diffused into the sea from a discharge pipe in the same system, FIG. 9A is an enlarged view of the Z portion of FIG. 9A, and FIG. 10 is an explanatory view showing a state of droplets formed by discharging carbon dioxide from the discharge pipe.

[0006] This mid-layer dilution discharge system is based on the land plant 1.
Liquefy the carbon dioxide that was separated and recovered from the combustion exhaust gas with
The liquefied gas is filled in the storage tank 2a and transported to a predetermined sea area by the liquefied gas carrier 2 and the liquid carbon dioxide in the storage tank 2a is transferred to the storage tank 3a mounted on the work vessel 3 there. Liquid carbon dioxide has a pressure of 6 atm and a temperature of −55 ° C., for example. FIG. 11 is a diagram showing the phase state of carbon dioxide. As can be seen from this diagram, the pressure of 6 atm and the temperature of −55 ° C. are the conditions under which liquid carbon dioxide can be economically obtained. Work boat 3 has a depth of 2
The discharge pipe 4 is made of a very long steel pipe or the like, which is suspended in the sea of 000 m to 2500 m. The discharge pipe 4 is closed at its lower end surface, and a plurality of discharge holes 5 are vertically arranged on the peripheral wall of the lower end portion. Then, they are formed side by side in the same row. Then, the liquid carbon dioxide is sent from the storage tank 3a to the discharge pipe 4 and discharged into the sea from a plurality of discharge holes 5 formed in the lower end of the discharge pipe 4 aligned in the vertical direction. The work boat 3 advances the liquid carbon dioxide from the hole 5 of the discharge pipe 4 while discharging the liquid carbon dioxide into the sea, thereby moving the discharge point of the liquid carbon dioxide without locally limiting it to enhance the dilution of carbon dioxide. The carrier ship 2 and the work ship 3 may be different from each other, or both may be used together. SL is the sea level.

The state of the liquid carbon dioxide discharged from the discharge pipe 4 is assumed as follows from the current knowledge. The liquid carbon dioxide 6 discharged into the sea from the hole 5 of the discharge pipe 4 is not immediately dissolved in the seawater, and a large number of fluctuations are generated in the fluctuating flow field 9 due to the vortex 8 which the discharge pipe 4 is generated and left behind. The liquid droplets 7 are dispersed and are almost uniformly mixed with seawater. The discharge pipe 4 receives the resistance of seawater due to the traveling of the work boat 3 and is inclined rearward in the traveling direction of the ship due to the relative flow velocity with the ocean current,
The wake vortex having a rotation axis substantially parallel to the axis behind it is continuously generated. The pattern of the vortex 8 varies depending on the shape of the discharge pipe, the state of the surface and the conditions such as the size and moving speed. When a pipe with an outer diameter of several 10 cm travels at a speed of several knots, it usually moves to the left and right in the direction of travel. It is conceivable that vortices are generated by exchanging from both sides to leave the fluctuating flow field 9 behind, in which liquid carbon dioxide and seawater mix.

The liquid carbon dioxide droplets 7 gradually rise in the seawater while further dissolving in the surrounding seawater from the wake of the discharge pipe 4. That is, the droplets 7 of liquid carbon dioxide rise in the seawater and melt into the seawater, so that the diameter thereof becomes smaller. Then, while the droplet 7 rises to a certain height, the liquid carbon dioxide is completely dissolved in the seawater, and the droplet 7 disappears.

The middle-layer diluted release system is about 2000 from the sea level.
The liquid carbon dioxide is discharged in the sea of a depth (middle layer) of m to 2500 m. That is, if liquid carbon dioxide is released in the sea above 2000 m, droplets may reach the sea surface before the released liquid carbon dioxide is completely dissolved in seawater.
Discharging liquid carbon dioxide in the sea at a depth of 00 m allows all the carbon dioxide to be dissolved in seawater before the droplets reach the sea surface.

[0010]

The discharge device adopting the middle-layer diluted discharge system is considered to be a very promising device for discharging and isolating carbon dioxide into the ocean.
This discharge device has the following problems.

That is, in the middle-layer diluted release system, if liquid carbon dioxide released into the sea dissolves in seawater, it may affect marine organisms. Therefore, in order to minimize such an effect, the release into the sea is performed. It is important to dilute the generated carbon dioxide as much as possible to suppress the increase in carbon dioxide concentration in seawater. As described above, the liquid carbon dioxide discharged into the seawater from the discharge hole of the forward-moving discharge pipe becomes droplets and dissolves in the seawater while rising in the width of the wake of the discharge pipe, and finally. Droplets disappear and all dissolve in seawater. For this reason, the liquid carbon dioxide released into seawater enters the seawater of a volume surrounded by the running speed of the ship (moving speed of the discharge pipe), the width of the wake of the discharge pipe, and the rising height of the droplets. It will be dissolved and diluted.

By the way, in the currently proposed discharge device, as a structure for discharging liquid carbon dioxide from the discharge pipe into the sea, a plurality of discharge holes are vertically arranged on the peripheral wall of the discharge pipe suspended from the ship into the sea. Direction, that is, they are formed side by side along the tube axis direction. However, according to this configuration, the width of the fluctuating flow field 9 due to the vortex 8 generated and left in the wake of the discharge pipe 4 is restricted to the size of the diameter of the discharge pipe 4, and at most the diameter ( Since it is about 3 to 4 times the width and not so wide, the liquid carbon dioxide discharged into the sea is dissolved and diluted (movement distance of the discharge pipe, width of the discharge pipe wake, and rising height of droplets). There is a limit to the size of the volume in seawater. Therefore, there is a limit to the degree to which the carbon dioxide released into the sea is diluted.

The present invention has been made based on the above-mentioned circumstances, and carbon dioxide intended to increase the dilution rate by increasing the volume of seawater diluted by the liquid carbon dioxide discharged into the sea from the discharge pipe. It is an object of the present invention to provide a diluting and discharging device of the above.

[0014]

According to a first aspect of the present invention, there is provided a device for diluting and releasing carbon dioxide, wherein liquid carbon dioxide is sent into the inside of a discharge pipe suspended in the sea from a ship traveling on the sea, and the carbon dioxide is discharged from the sea into the sea. In the discharge device for discharging to, the discharge pipe has a pipe along a direction intersecting with the traveling direction of the ship, and a plurality of pipes for discharging the liquid carbon dioxide sent to the discharge pipe are provided in this pipe. It is characterized in that the discharge holes are formed side by side along the axial direction.

In the apparatus for diluting and releasing carbon dioxide according to the invention of claim 2, liquid carbon dioxide is sent to the discharge pipe while the ship having the discharge pipe suspended in the sea travels over the sea and tows the discharge pipe. In the discharge device for discharging into the sea from the discharge hole formed in the discharge pipe, the discharge pipe rotatably connects the discharge hole forming portion to a portion above the discharge hole forming portion, and connects the discharge hole forming portion to the discharge hole forming portion. Is provided with a guide member that exerts a force for displacing the discharge hole forming portion in a direction intersecting the towing direction with the rotation connecting portion as a center when the discharge pipe is towed.

According to a third aspect of the present invention, in the apparatus for diluting and releasing carbon dioxide according to the second aspect, the guide members provided in the discharge hole forming portion are located on both sides of the discharge pipe with respect to the towing direction. It is characterized by a pair of wings protruding in the intersecting direction and having angles of attack with respect to the flow of seawater which are opposite to each other.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a diagram schematically showing a discharge device according to this embodiment, and FIG. 2 is an enlarged sectional view showing a liquid carbon dioxide discharge part of a discharge pipe in this discharge device. The present invention is directed to a device for discharging the liquid carbon dioxide shown in FIGS. 6 to 8 to the ocean by the middle-layer diluted discharge system. In FIG. 1, the same parts as those in FIG. There is. That is, in the figure, 3 is a work boat, 3a is a tank mounted on the work boat 3 for storing liquid carbon dioxide,
Reference numeral 4 denotes a discharge pipe which is attached to the work boat 3 and which is suspended in the sea and which stores the liquid carbon dioxide stored in the tank 3a from the upper end thereof to flow and discharge into the sea.

In this embodiment, the structure described below is adopted to discharge the liquid carbon dioxide to the lower end of the discharge pipe 4. The discharge pipe 4 has a circular cross section, and has a length that allows the discharge pipe 4 to be suspended in the sea at a depth of 2000 m to 2500 m from the work boat 3 and towed by the traveling of the work boat 3. At the lower end of the discharge pipe 4, in a direction crossing the traveling direction of the work boat 3 (the direction in which the discharge pipe 5 is towed by the traveling of the work boat 3, in other words, the pipe axis direction of the discharge pipe 4). A lateral discharge pipe 11 is provided, which is a pipe having a circular cross section extending along the side discharge pipe 11. The lateral discharge pipe 11 extends toward the left and right sides of the discharge pipe 4 at the same length along a direction (diameter direction of the discharge pipe 4) intersecting at right angles with the ship traveling direction. . The longitudinal center of the lateral discharge pipe 11 is connected to the lower end of the discharge pipe 4 so that the inside of the lateral extension 11 and the inside of the discharge pipe 4 communicate with each other. The lateral discharge pipe 11 is integrally fixed to or integrally formed with the discharge pipe 4 by an appropriate method, and both end faces of the lateral discharge pipe 11 in the pipe axial direction are closed. Side discharge pipe 1
A plurality of discharge holes 12 are formed in a row along the axial direction of the side discharge pipe 11 on the peripheral wall of the first side wall 1. The row of the discharge holes 12 assumes that the side discharge pipe 11 will be in various states when the discharge pipe 4 is towed in the sea, and also considers the discharge amount of liquid carbon dioxide and the like. It is formed at a plurality of locations on the circumferential wall of the circumferential wall 11 spaced apart in the circumferential direction.

Here, the diameter and overall length of the lateral discharge pipe 11 are set in consideration of conditions such as the discharge amount of liquid carbon dioxide. For example, the length of the lateral discharge pipe 11 is set to be a multiple of the diameter of the discharge pipe 4, for example, 10 to several tens of times. Also, the diameter of the discharge holes 12, the number and intervals of the discharge holes 12 in a row,
The number and position of rows of the discharge holes 12 are set in consideration of conditions such as the discharge amount of liquid carbon dioxide.

The discharge device constructed as described above is used in the work boat 3
The discharge pipe 4 is towed and moves. The side discharge pipe 11 moves together with the discharge pipe 4. And work boat 3
The liquid carbon dioxide stored in the storage tank 3a mounted on is discharged into the sea through the discharge pipe 4. In this case, if liquid carbon dioxide is sent from the upper end of the discharge pipe 4 to the inside,
The liquid carbon dioxide flows down the inside of the discharge pipe 4 and reaches the lower end of the discharge pipe 4. Then, the liquid carbon dioxide flows by flowing into the inside of the side discharge pipe 11 provided at the lower end of the discharge pipe 4, and further from the plurality of rows of discharge holes 12 formed in the side discharge pipe 11 along the axial direction, respectively. It is discharged into the sea in the direction of vessel travel (the rear side of the direction of discharge pipe travel).

Here, the lateral discharge pipe 11 is provided with a length that is a multiple of the diameter of the discharge pipe 4 along a direction intersecting at right angles with the ship traveling direction (the discharge pipe advancing direction).
Since the plurality of discharge holes 12 are also arranged along the same direction, the liquid carbon dioxide discharged from the plurality of discharge holes 12 spreads in a band shape in a direction intersecting at right angles to the ship traveling direction (the discharge pipe advancing direction). . The carbon dioxide 6 discharged into the sea from the discharge hole 12 of the discharge pipe 11 is not immediately dissolved in the seawater, and in the fluctuating flow field 9 due to the vortex 8 which the side discharge pipe 11 forms and leaves in the wake. A large number of droplets 7 are dispersed and mixed with seawater almost uniformly. The lateral discharge pipe 11 receives the resistance of seawater due to the traveling of the work boat 3 but maintains a horizontal posture, and advances while continuously generating a wake vortex 8 behind it with a rotation axis substantially parallel to the axis. Go out. As the side discharge pipe 11 advances, the fluctuating flow field 9 is left behind, in which carbon dioxide and seawater are mixed. The width of this fluctuating flow field 9 is the lateral discharge pipe 1
In order to correspond to the direction and length of the row in which the discharge holes 12 are aligned, the width of the fluctuating flow field 9 when the conventional discharge holes 12 are arranged in the vertical direction is a multiple of the width, which is 10 times the diameter of the discharge pipe 4. To several tens of times. Then, the carbon dioxide droplets 7 gradually dissolve in the surrounding seawater from the wake of the discharge pipe 4 while gradually rising in the seawater, and gradually melt into the seawater, whereby the diameter becomes smaller.

In this way, the liquid carbon dioxide discharged into the sea dissolves and is diluted (surrounded by the moving distance of the discharge pipe 4, the width of the discharge pipe wake and the rising height of the liquid droplets) in seawater. Is increased by the amount by which the width of the wake of the discharge pipe is expanded by the side discharge pipe 11 and is increased by a multiple times as compared with the conventional case, and accordingly, the dilution rate of liquid carbon dioxide in the sea is significantly increased.

The pipes along the direction intersecting the traveling direction of the work boat 3 are not limited to the above-mentioned embodiments, but can be modified in various ways. In the configuration shown in FIG. 3, a mountain-shaped side discharge pipe 13 is used and its top is connected to the lower end of the discharge pipe 4. In the form shown in FIG. 4, the branch pipes 14 that are bifurcated from the lower end of the discharge pipe 4 are connected in a vertical direction, and, for example, two side discharge pipes 15 are arranged between the branch pipes 14 on the upper and lower sides. It is connected to the branch pipe 14. In the form shown in FIG. 5, two discharge pipes 4 are suspended from the work boat in the sea,
For example, two lateral discharge pipes 15 are arranged on the upper and lower sides of the two discharge pipes 4 and are connected to the discharge pipe 4. The lateral discharge pipes 14 and 15 in FIGS. 4 and 5 are arranged along a direction intersecting at right angles with the traveling direction of the work boat 3. 3 to 5, the same parts as those in FIG. 2 are designated by the same reference numerals.

FIG. 6 and FIG. 7 for the second embodiment.
Will be described with reference to.

FIG. 6 (a) is a schematic view of the discharge device according to this embodiment, FIG. 6 (b) is an enlarged view of the main part of the discharge pipe in FIG. 6 (a), and FIG. (A) is a figure which shows typically the state at the time of discharge pipe towing in the discharge device of this Embodiment, and FIG.7 (b) is a figure which expands and shows the principal part of the discharge pipe in FIG.7 (a). .

This embodiment is also directed to a device for discharging the liquid carbon dioxide shown in FIGS. 8 to 10 to the ocean by the middle-layer dilution discharge system, as shown in FIGS. 6 and 7.
7, the same parts as those in FIG. 7 are denoted by the same reference numerals. That is, in the figure, 3 is a work boat, 3a is a tank for storing liquid carbon dioxide mounted on the work boat 3, and 4 is the work boat 3
It is a discharge pipe that is attached to, is suspended in the sea, and stores the liquid carbon dioxide stored in the tank 3a from the upper end to flow and discharge it into the sea.

In this embodiment, in order to discharge the liquid carbon dioxide to the lower end portion of the discharge pipe 4, the structure described below is adopted. The discharge pipe 4 has a circular cross section, and the work boat 3
Has a length that allows it to be suspended in the sea at a depth of 2000 m to 2500 m and towed by the traveling of the work boat 3. A lower end portion of the discharge pipe 4 is configured as a discharge hole forming portion 4a forming a discharge hole, which is separated from a main body portion 4b of the discharge pipe 4 above the discharge hole forming portion 4a. A pipe having a circular cross section having a length required to form the holes 5 in the axial direction of the pipe (a length that is a multiple of the diameter of the discharge hole forming portion 4a, for example, several tens of meters) is formed. The discharge hole forming portion 4a has a closed lower end and an open upper end, and a large number of discharge holes 5 are formed side by side on the peripheral wall over the entire pipe axial direction. An upper end of the discharge hole forming portion 4a is rotatably connected to a lower end of a main body portion 4b of the discharge pipe 4, and the discharge hole forming portion 4a can be rotated about all of the vertical and horizontal directions about the rotary connecting portion. The main body portion 4b and the discharge hole forming portion 4a communicate with each other via a rotary connecting portion. Examples of the member that rotatably connects the discharge hole forming portion 4a and the main body portion 4b include a universal joint and a flexible pipe. Here, the flexible pipe 21 having a simple structure and high economical efficiency is used. I am using.

At the lower end of the discharge hole forming portion 4a, a streamlined member 31 is fixed by an appropriate means or integrally formed. As shown in FIG. 6, the streamlined member 31 is oriented such that its tip is directed to the front side of the discharge pipe towing direction A, and its axis is perpendicular to the pipe axis of the discharge pipe 4, that is, the discharge line. It is arranged along a direction parallel to the towing direction A. Further, blades 32 and 33 are provided on both left and right sides in the width direction (diameter direction of the discharge pipe axis direction) of the streamlined member 31, and these blades 32 and 33 are perpendicular to the axial direction of the streamlined member 31. It is fixed by an appropriate means so as to project outward along a right direction, that is, a direction perpendicular to the discharge pipe towing direction A, or is integrally formed. This pair of wings 3
2 and 33 have the same width and length, respectively,
The elevation angle is set to be opposite. For example, one of the blades 32 is inclined so that the front side edge of the discharge tube towing direction is downward, while the other blade 33 is inclined so that the rear side edge of the discharge tube towing direction is low. As a result, for example, a downward lift is generated on one blade 32 and an upward lift is generated on the other blade 33. That is, the pair of blades 32 and 33 is an example of a guide member that exerts a force that displaces the discharge hole forming portion 4a in a direction intersecting with the towing direction about the rotary connecting portion when the discharge pipe is towed. The portion where the pair of wings 32 and 33 is provided is the streamlined member 31 in order to reduce the resistance of seawater during towing of the discharge pipe as much as possible.

The operation of the discharge device thus configured will be described. As shown in FIG. 7, when the work boat 3 travels, the discharge pipe 4 suspended in the sea receives the resistance of seawater and is towed in a tilted rearward direction. Here, the pair of blades 32, 33 provided at the lower end of the discharge hole forming portion 4a constituting the lower end portion of the discharge pipe 4 receive the resistance of seawater. A downward lift is generated on one of the wings 32 which is located on one side of the discharge hole forming portion 4a and inclines so that the front edge of the discharge pipe towing direction is directed downward, and is positioned on the other side and is positioned on the other side of the discharge pipe towing direction An upward lift is generated on the other wing 33 that inclines so that the side edge is low. When vertical lift forces are generated on the left and right sides at the lower end (tip) of the discharge hole forming portion 4a of the discharge pipe 4 in this way, the rotary connecting portion, that is, the main body portion 4b of the discharge pipe 4 is formed at the tip of the discharge hole forming portion 4a. A moment is generated that attempts to rotate the discharge hole forming portion 4a about the tube axis.
Then, the discharge hole forming portion 4a rotates about the rotation coupling portion in a direction intersecting with the discharge pipe towing direction A to be in an inclined state.

The storage tank 3 mounted on the work boat 3
Liquid carbon dioxide stored in a is discharged into the main body portion 4b of the discharge pipe 4.
Send to. Liquid carbon dioxide sent is the main body 4b
Flowing from the upper end to the lower end, further flowing into the discharge hole forming portion 4a through the flexible pipe 21 which is a rotary connection body, and being discharged into the sea from a large number of discharge holes 5 arranged in the pipe axis direction of the discharge hole forming portion 4a. It

Here, since the discharge hole forming portion 4a is inclined along the direction intersecting with the discharge pipe towing direction A, the discharge hole forming portion 4a is discharged from the plurality of discharge holes 5 arranged in the pipe axis direction in the discharge hole forming portion 4a. The liquid carbon dioxide spreads in a band shape in a direction intersecting the discharge pipe towing direction A at a right angle. The carbon dioxide 6 discharged into the sea from the discharge hole 5 of the discharge hole forming portion 4a does not immediately dissolve in the seawater, and the fluctuation flow field 9 due to the vortex 8 generated and left behind by the discharge hole forming portion 4a 9 A large number of droplets 7
And is dispersed and mixed almost uniformly with seawater. The discharge hole forming part 4a of the discharge pipe 4 advances while continuously generating a wake vortex 8 having a rotation axis substantially parallel to the axis behind it. As the discharge hole forming portion 4a progresses, vortices are exchanged and vortices are generated to leave the fluctuating flow field 9 behind, in which carbon dioxide and seawater are mixed. The width of this fluctuating flow field 9 is equal to
In order to correspond to the direction and length of the row in which the discharge holes 5 of a are arranged,
It becomes a multiple of the width of the fluctuating flow field 9 when the conventional discharge holes 5 are arranged in the vertical direction, and is several ten times to several tens of the diameter of the discharge pipe 4.
Doubled. Then, the carbon dioxide droplets 7 gradually dissolve in the surrounding seawater from the wake of the discharge pipe 4 while gradually rising in the seawater, and gradually melt into the seawater, whereby the diameter becomes smaller.

In this way, the liquid carbon dioxide discharged into the sea is dissolved and diluted (surrounded by the moving distance of the discharge pipe 4, the width of the downstream flow of the discharge pipe 4 and the rising height of the droplet 7). Is increased by the width of the wake of the discharge pipe 4 by the discharge hole forming portion 4a, and is increased several times as compared with the conventional one, and accordingly, the dilution rate of the liquid carbon dioxide 6 in the sea is also greatly increased. Increase to. Further, in this embodiment, the guide members provided in the discharge hole forming portion are located on both sides of the discharge pipe and protrude in a direction intersecting with the towing direction, and the angles of attack with respect to the seawater flow are opposite to each other. It is configured as a proper structure by the wing.

The present invention is not limited to the above-mentioned embodiments, but can be modified in various ways.

[0035]

As described above, according to the apparatus for diluting and releasing carbon dioxide of the present invention, liquid carbon dioxide is discharged into the sea from a plurality of discharge holes formed in a pipe along a direction crossing the traveling direction of a ship. The width of the fluctuating flow field due to the vortices that are generated and left by the discharge pipe is greatly expanded compared to the conventional one,
Liquid carbon dioxide released from the discharge pipe into the sea dissolves and the volume of diluted seawater is greatly increased compared to the conventional one, thereby significantly increasing the dilution rate of liquid carbon dioxide in seawater. be able to.

According to the apparatus for diluting and discharging carbon dioxide of the present invention, the discharge hole forming portion of the discharge pipe is rotatably connected to the upper portion thereof, and the discharge pipe is towed by the running of the ship. When liquid carbon dioxide is discharged into the sea from the discharge pipe formed in the discharge hole forming part, the guide hole provided in the discharge hole forming part intersects the discharge hole forming part with respect to the towed direction around the rotary connection part. In order to displace in the direction, the width of the fluctuating flow field due to the vortices generated and left by the discharge pipe is greatly expanded compared to the conventional one. Therefore, it is possible to significantly increase the dilution rate of liquid carbon dioxide in seawater by significantly increasing the volume of seawater diluted by the dissolution of liquid carbon dioxide discharged from the discharge pipe into the sea compared to the conventional method. You can Furthermore, the guide member provided in the discharge hole forming portion can be appropriately configured as a pair of blades.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a discharge device according to a first embodiment of the present invention.

FIG. 2 is a view showing a discharge part of a discharge pipe provided in the discharge device in the same embodiment.

FIG. 3 is a diagram showing another form of the discharge portion of the discharge pipe provided in the discharge device.

FIG. 4 is a view showing another form of the discharge portion of the discharge pipe provided in the discharge device.

FIG. 5 is a view showing another form of the discharge portion of the discharge pipe provided in the discharge device.

FIG. 6 is a diagram schematically showing a discharge device according to a second embodiment of the present invention.

FIG. 7 is a view schematically showing a discharge pipe towed state in the discharge device of the same embodiment.

FIG. 8 is a diagram showing a system for releasing carbon dioxide into the ocean.

FIG. 9 is a diagram schematically showing a discharge device of carbon dioxide to the ocean.

FIG. 10 is a diagram schematically showing a state of liquid carbon dioxide discharged into the sea by a discharge device.

FIG. 11 is a diagram showing a phase state of carbon dioxide.

[Explanation of symbols]

3 ... work boat, 4 ... Discharge pipe, 4a ... Discharge hole forming part 4b ... main body, 6 ... Liquid carbon dioxide, 11 ... Side discharge pipe, 12 ... Discharge hole, 21 ... Flexible tube (rotary connecting body), 31 ... Streamline member, 32 ... Wing (guide member), 33 ... Wing (guide member).

Continued front page    F-term (reference) 4D047 AA05 BA06 BA07 BA08                 4G035 AA04 AE13 AE19                 4G046 JB00 JB21                 4G075 AA03 AA04 BB01 BB03 BB08                       BD03 BD09 BD15 CA74 EB21                       EC02 FC17

Claims (3)

[Claims] 1. A discharge device for feeding liquid carbon dioxide into a discharge pipe suspended in the sea from a ship traveling on the sea and discharging the discharge from the discharge pipe into the sea, wherein the discharge pipe is in the traveling direction of the ship. A pipe is provided along a direction intersecting with each other, and a plurality of discharge holes for discharging the liquid carbon dioxide sent to the discharge pipe are formed side by side in the pipe along the axial direction. A device for diluting and releasing carbon dioxide. 2. A ship in which a discharge pipe is suspended in the sea is run over the sea towing the discharge pipe, and liquid carbon dioxide is sent to the discharge pipe to discharge it into the sea from the discharge hole formed in the discharge pipe. In the discharge device for discharging, the discharge pipe rotatably connects the discharge hole forming portion to a portion above it, and the discharge hole forming portion has the discharge hole forming portion when the discharge pipe is towed. A device for diluting and releasing carbon dioxide, characterized in that a guide member for exerting a force for displacing the rotary connecting portion in a direction intersecting the towing direction is provided. 3. The guide member provided in the discharge hole forming portion,
The carbon dioxide according to claim 2, which is a pair of blades located on both sides of the discharge pipe and projecting in a direction intersecting with the towing direction and having angles of attack opposite to each other with respect to the flow of seawater. Dilution discharge device.