System for capturing a gaseous compound from a surrounding gas with a coanda suction device

Abstract

The present invention relates to a system (1) for capturing a gaseous compound from a surrounding gas which comprises at least one compartment (2) for absorbing or adsorbing the gaseous compound, and a device (3) for applying suction to the surrounding gas. According to the invention, the device (3) for applying suction to the surrounding gas comprises at least one pipe (4) applying Coanda effect for blowing in the surrounding gas.

Description

[0001] SYSTEM FOR CAPTURING A GAS COMPOUND FROM AN SURROUNDING GAS WITH

[0002] COANDA EFFECT SUCTION DEVICE

[0003] technical field

[0004] The present invention relates to the field of capturing a gaseous compound, in particular a polluting gas such as carbon dioxide, from a surrounding gas, especially air. Specifically, the invention relates to the capture of atmospheric CO2, known as Direct Air Capture (DAC).

[0005] Globally, up to 660 billion tonnes of carbon dioxide (CO2) must be removed from the atmosphere by the end of the century to limit global warming to 1.5°C. This is according to the latest report from the Intergovernmental Panel on Climate Change (IPCC), which based its estimates on atmospheric CO2 concentrations measured in 2020.

[0006] To eliminate such a quantity of CO2, it will not be enough to plant many trees, nor to capture CO2 directly from the output of systems emitting these gaseous compounds: vehicles, industries, etc. Therefore, direct air capture (DAC) systems have been developed to extract large quantities of CO2 from the atmosphere while using very few resources.

[0007] Previous technique

[0008] Typically, a DAC unit uses large fans to push air through an absorbent or adsorbent material, liquid or solid, which can bind and remove CO2. The absorption or adsorption material is regenerated, for example when heated, leaving a CO2 concentrate.

[0009] Concentrated CO2 can either be stored permanently, usually underground in depleted oil and gas reservoirs or deep saline aquifers, or used to produce useful chemicals such as synthetic fuels. These fuels release CO2 again when burned and are therefore technically carbon neutral.

[0010] Patent applications WO2010 / 022339, WG2020 / 254208, and WO2020 / 212146 describe examples of DACs (Dynamic Air Capture). In these examples, several absorption compartments are placed side-by-side and stacked to form a comprehensive CO2 capture system. Each absorption compartment is also equipped with a fan at its outlet. Current DAC units have several limitations due to the use of numerous fans to move air through the absorption or adsorption material. This design necessitates sizing the fans to the size of the module to which they are attached, preventing the use of economies of scale and the selection of more efficient technologies. The result is a greater use of critical materials and higher energy consumption.Furthermore, the dispersed nature of rotating machinery makes it more difficult and costly to limit nuisances such as noise and vibration. Fans also exhibit start-up inertia, which hinders their use in cyclic processes, as is the case in reference units. In addition, they require numerous electrical connections, and the proliferation of equipment increases the risk of breakdowns and complicates potentially extensive maintenance. Moreover, the weight, cost (due to the increased number of fans), installation complexity, and environmental impact of this solution can be significant.

[0011] Summary of the invention

[0012] The invention aims to capture a gaseous compound from a surrounding gas using a simple, lightweight, inexpensive, low-maintenance, and quiet system. To this end, the present invention relates to a system for capturing a gaseous compound from a surrounding gas, comprising at least one compartment for absorbing or adsorbing the gaseous compound, and a device for drawing in the surrounding gas. According to the invention, the device for drawing in the surrounding gas includes at least one Coanda-effect insufflation duct for the surrounding gas. The Coanda effect generates an aerodynamic movement of the surrounding gas through each compartment so as to capture the gaseous compound. Thus, no fan with rotating blades is used in the flow of surrounding gas passing through the absorption and adsorption compartments, which notably limits pressure losses, maintenance, and vibrations, and simplifies the capture system.Furthermore, this design allows the suction device to be shared for several absorption and adsorption compartments, which simplifies the capture system and reduces costs, and enables the implementation of air compression devices that are more efficient than simple fans.

[0013] The invention relates to a system for capturing a gaseous compound, in particular carbon dioxide, from a surrounding gas, in particular air, comprising at least one absorption or adsorption compartment for said gaseous compound and at least one suction device for said surrounding gas to generate a flow of the surrounding gas through at least one absorption or adsorption compartment, said absorption or adsorption compartment comprising at least one absorbing or absorbing medium for said gaseous compound. Each suction device comprises at least one Coanda-effect insufflation duct for said surrounding gas.

[0014] According to one embodiment, said suction device includes an inlet of said surrounding gas, a compressor connected to said inlet, at least one distribution line connected to said compressor, at least one Coanda effect blowing line connected to at least one distribution line.

[0015] Advantageously, said suction device includes at least one shut-off valve on at least one distribution line.

[0016] According to one embodiment, said suction device includes a recirculation line between an outlet and an inlet of at least one distribution line, preferably said recirculation line includes a recirculation fan.

[0017] Advantageously, said suction device includes a heat exchanger arranged on a distribution pipe.

[0018] According to one aspect, each suction device is arranged to generate a flow of said surrounding gas through a plurality of absorption or adsorption compartments.

[0019] According to an implementation, at least one suction device is arranged downstream of each absorption or adsorption compartment in the direction of flow of the surrounding gas.

[0020] According to one embodiment, at least one suction device is arranged upstream of each absorption or adsorption compartment in the direction of flow of the surrounding gas.

[0021] Depending on the configuration, each blowing duct includes a section substantially shaped like an airplane wing and a slot for the passage of surrounding gas.

[0022] Advantageously, each supply line includes a partition to reduce the gas passage cross-section.

[0023] Depending on the implementation, these supply lines are either horizontal or vertical.

[0024] Advantageously, the suction device includes at least one counter blade parallel to the supply line downstream of said supply line in the direction of the surrounding gas flow. In one embodiment, said system comprises a plurality of absorption or adsorption compartments arranged side by side and / or one above the other.

[0025] According to one aspect, the surrounding gas aspiration device includes a means of absorption or adsorption of the gaseous compound.

[0026] According to one implementation, said surrounding gas aspiration device includes at least one pair of parallel blow-off ducts.

[0027] Other features and advantages of the system according to the invention will become apparent from the following description of non-limiting examples of implementations, with reference to the figures attached and described below.

[0028] List of figures

[0029] Figure 1 illustrates a capture system according to a first embodiment of the invention.

[0030] Figure 2 illustrates a cross-section of an insufflation duct according to a first embodiment variant.

[0031] Figure 3 illustrates the aerodynamic movement of the surrounding gas between two blow-in ducts.

[0032] Figure 4 illustrates a capture system according to a second embodiment of the invention.

[0033] Figure 5 illustrates a collection system according to a third embodiment of the invention. Figure 6 illustrates a cross-section of a supply duct according to a second embodiment.

[0034] Figure 7 illustrates a suction device according to a first implementation of the invention.

[0035] Figure 8 illustrates a capture system according to a fourth embodiment of the invention.

[0036] Figure 9 illustrates a suction device according to a second embodiment of the invention.

[0037] Figure 10 illustrates a suction device according to a third embodiment of the invention.

[0038] Figure 11 illustrates a suction device according to a fourth embodiment of the invention.

[0039] Figure 12 illustrates a suction device according to a fifth embodiment of the invention.

[0040] Figure 13 illustrates a suction device according to one variant embodiment.

[0041] Figure 14 illustrates a suction device according to one variant embodiment.

[0042] Figure 15 illustrates a suction device according to one variant embodiment.

[0043] Description of the implementation methods

[0044] The present invention relates to a system for capturing a gaseous compound from a surrounding gas. A gaseous compound is defined as one of the gases that constitute the surrounding gas. For example, the gaseous compound could be an acidic compound such as carbon dioxide, methane, water vapor, nitrogen dioxide, nitrogen oxides, particulate matter, ozone, sulfur dioxide, etc. As another example, the surrounding gas could be atmospheric air. According to one embodiment of the invention, the capture system can be designed to capture CO2 from the air; this is then referred to as a direct air capture (DAC) system.

[0045] The collection system includes:

[0046] - At least one compartment (also called a module) for the absorption or adsorption of the gaseous compound, i.e., a volume in which the gaseous compound present in the surrounding gas is absorbed or adsorbed; for this purpose, each compartment includes a material for the absorption or adsorption of the gaseous compound.

[0047] - At least one surrounding gas suction device to generate an aerodynamic movement of the surrounding gas through each absorption or adsorption compartment; in other words, the surrounding gas suction device allows a flow of surrounding gas within each absorption or adsorption compartment.

[0048] According to the invention, each ambient gas intake device comprises at least one ambient gas Coanda supply line (hereafter referred to simply as "supply lines"), preferably a pair of parallel supply lines. The Coanda effect is the attraction of a fluid jet to a convex surface over which it flows. The fluid follows the surface and undergoes a deflection before exiting with a trajectory different from its upstream path. This effect is partly responsible for the behavior of an aircraft wing. A Coanda surface is a known type of surface over which a fluid flow exiting an outlet near the surface exhibits the Coanda effect. The fluid tends to flow tightly over the surface, almost "clinging" or "hugging" it.The Coanda effect is already a proven and well-documented entrainment method by which a primary airflow is directed onto the Coanda surface. Thus, each supply duct has a Coanda surface, which can be roughly shaped like an aircraft wing (in its cross-section perpendicular to the aerodynamic motion of the surrounding gas), and includes, near the leading edge of the duct (the end of the duct facing upstream in the direction of the surrounding gas flow), a slot that injects pre-compressed surrounding air in the form of a jet. The low pressure created by this jet then draws in a quantity of external surrounding gas in the direction of the jet. The entrainment rate of the surrounding gas (relative to the quantity of surrounding gas drawn in by the jet) can reach a value greater than 10.According to one example, the blowing duct can be a duct perpendicular to the flow of the surrounding gas, which has a cross-section with a Coanda surface, with a leading edge, a slot, an intrados (Coanda surface, especially in the shape of an airplane wing), and a substantially flat extrados.

[0049] Preferably, the suction device does not include any rotating parts in the flow of the surrounding gas.

[0050] Thanks to this supply line, and particularly when the suction device has no rotating parts in the surrounding gas flow, pressure losses, vibrations, and reduced noise, weight, and maintenance and installation difficulties are avoided. In the embodiment where the suction device includes at least one pair of parallel supply lines, the intrados (the wing-shaped edge) of a pair of parallel lines can preferably face each other. In this way, the parallel supply lines, through the Coanda effect, generate suction of the surrounding gas between the supply lines. Alternatively, in the embodiment where the suction device includes at least one pair of parallel supply lines, the intrados of one line can face the extrados of a second line.

[0051] Advantageously, each supply line is arranged opposite at least one absorption or adsorption compartment (preferably opposite the absorption or adsorption compartments). In other words, the surrounding gas flows in a substantially straight line through the absorption or adsorption compartment and the suction device.

[0052] The gaseous compound is captured through a separation medium (also called an absorption or adsorption material) which captures the gaseous compound (absorption or adsorption phase). This separation medium is then regenerated. The separation medium can be liquid or solid, in the form of a fixed bed or a fluidized bed. When the separation medium is liquid, the absorption or adsorption compartment may include packing (structured or bulk) or exchanger trays on which mass exchange occurs between the liquid and the surrounding gas. The separation liquid can be any liquid capable of removing the gaseous compound from the surrounding gas. For example, for CO2 capture applications in air, the liquid could be a basic solution, such as KOH or NaOH. For this CO2 capture application in air, the material can be in granular form.Patent applications W02009 / 149292, WO2017 / 009241 and WO2016185387 describe examples of granular materials for this application: planar structures functionalized with amines (i.e. monoliths), a solid support functionalized with an amine, supports functionalized with K2CO3.

[0053] Advantageously, the capture system can comprise a plurality of compartments. In this configuration, the compartments are all identical and arranged side by side and above one another. For example, the installation can be similar to the configuration described in Figure 1 of patent application WO2010 / 022339, except that the fans are replaced by the suction device according to the invention. This installation facilitates, thanks to its modular structure (and therefore simplifies the process), the capture of a large quantity of gaseous compound.

[0054] According to one embodiment of the invention, each suction device may comprise:

[0055] An inlet of surrounding gas,

[0056] A compressor connected to the inlet of the surrounding gas, so as to compress the extracted gas,

[0057] At least one distribution line connected to the surrounding gas inlet, so as to distribute the compressed gas, and

[0058] - At least one Coanda effect supply line (preferably at least one pair of supply lines) connected to at least one distribution line, to propel the surrounding compressed gas from the distribution line in a jet.

[0059] This design is efficient, simple to install and maintain.

[0060] Advantageously, each suction device may include at least one shut-off valve on at least one distribution line, to control the circulation of the surrounding compressed gas in the distribution lines, and consequently in the blowing lines, in particular for the regeneration phase of the absorbing or adsorbent material.

[0061] Advantageously, each suction device can include a recirculation line between an outlet and an inlet of a distribution line (in the direction of ambient gas flow); preferably, the recirculation line includes a recirculation fan. Thus, the compressed ambient gas is reinjected into the supply lines, thereby reducing the effects of pressure variations along the distribution line and avoiding the need to modulate the ambient gas flow area.

[0062] According to one embodiment, the ambient gas inlet may include a sampling means arranged downstream of the extraction system outlet. This embodiment allows for the recycling of at least some of the ambient gas, which can promote the use of the compressor within its operating range.

[0063] According to one embodiment of the invention, the suction device may comprise a plurality of pairs of insufflation tubes parallel to each other. The Coanda effect is implemented within each pair of insufflation tubes. The upper surfaces (flat edges of the aircraft wing shape) of the insufflation tubes of two consecutive pairs face each other, or may be in contact.

[0064] According to one embodiment of the invention, at least one supply line may include an internal partition limiting the volume inside the supply line. The internal partition may be substantially perpendicular to the substantially flat upper surface. Furthermore, the distance between the internal partition and the leading edge may vary along the supply line. Alternatively, the internal partition may be inclined relative to the substantially flat upper surface. This internal partition allows the pressure within the supply line to be adjusted, and thus the injection velocity of the surrounding compressed gas to be adjusted.

[0065] According to one embodiment of the invention, each suction device can be arranged to generate an aerodynamic movement of the surrounding gas through a plurality of absorption or adsorption compartments. In other words, a single suction device is designed for several absorption or adsorption compartments. Thus, the number of suction devices is limited, which simplifies design, reduces weight and cost, and minimizes the risk of breakdowns and maintenance.

[0066] According to one embodiment of the invention, each suction device may include its own means for absorbing or adsorbing the gaseous compound upstream (in particular at the inlet of the ambient gas intake), thus the air treated by the suction device is itself freed of the gaseous compound to be captured and contributes to the overall efficiency of the system. This means for absorbing or adsorbing the gaseous compound is separate from the absorption or adsorption compartment.

[0067] According to one embodiment, each suction device may include a heat exchanger arranged between the compressor and the distribution line. This heat exchanger is designed to recover energy (heat) from the surrounding compressed gas and to cool the surrounding compressed gas.

[0068] According to a first embodiment of the invention, each suction device can be arranged downstream of each absorption or adsorption compartment, in the direction of the surrounding gas flow. Thus, in this embodiment, the surrounding gas first passes through the absorption or adsorption compartment and then through the suction device, which allows for better homogeneity of the flow at the inlet of the absorption or adsorption compartment, and thus limits pressure losses upstream of the absorption or adsorption compartment, thereby ensuring good performance in capturing the gaseous compound.

[0069] According to a second embodiment of the invention, each suction device can be arranged upstream of each absorption or adsorption compartment, in the direction of the surrounding gas flow. Thus, in this embodiment, the surrounding gas first passes through the suction device and then the absorption or adsorption compartment, thereby increasing the flow rate of surrounding gas for capturing the gaseous compound.

[0070] A third embodiment of the invention may consist of a combination of the two embodiments described above: the capture system then comprises a first suction device upstream of each absorption or adsorption compartment, and a second suction device downstream of each absorption or adsorption compartment, in the direction of flow of the surrounding gas. In this embodiment, the surrounding gas successively passes through the first suction device, an absorption or adsorption compartment, and the second suction device.

[0071] According to a first configuration, each supply line can be substantially horizontal.

[0072] Alternatively, each supply duct can be virtually vertical. This configuration limits fouling.

[0073] Alternatively, each supply line can be inclined relative to the horizontal, while remaining parallel to the other supply lines.

[0074] According to one embodiment of the invention, the capture system may include at least one counter blade parallel to and opposite at least one supply duct, to improve the homogeneity of the surrounding gas flow. The counter blade is arranged downstream of the supply duct in the direction of the surrounding gas flow. Preferably, a counter blade is arranged parallel to each supply duct. The counter blade improves the efficiency and homogeneity of the surrounding gas flow. The counter blade has an aerodynamic shape and substantially has a cross-section resembling an aircraft wing.

[0075] Advantageously, each absorption or adsorption compartment can have a substantially parallelepiped shape, so as to simplify its design, installation, and the arrangement of several absorption or adsorption compartments. According to one embodiment of the invention, the suction device can comprise a plurality of rows of supply lines. This embodiment increases the suction power and generates a more homogeneous flow. Preferably, the supply lines of consecutive rows can have different inclinations (for example, respectively horizontal and vertical). Advantageously, the suction device can comprise two rows of supply lines.

[0076] Depending on one embodiment option, each insufflation duct can be straight, circular, oval, rectangular, or any similar shape.

[0077] Figure 1 schematically and non-limitingly illustrates a capture system according to a first embodiment of the invention. Figure 1 is a cross-sectional view of the capture system. In this figure, the arrows illustrate the aerodynamic movement of the surrounding gas. The capture system 1 comprises three compartments 2 for absorbing or adsorbing the gaseous compound. The compartments 2 are substantially parallelepiped-shaped. The three compartments 2 are arranged one above the other. The capture system 1 also includes a suction device 3. For the illustrated embodiment, the suction device 3 is arranged downstream of the absorption or adsorption compartments 2, in the direction of flow of the surrounding gas. The suction device 3 comprises three pairs of blow-off ducts 4, having a substantially aircraft wing shape.In other words, the three pairs of supply lines 4 belong to the same suction device and generate an aerodynamic movement of the surrounding gas for a plurality of absorption or adsorption compartments 2. The surrounding gas is preferentially drawn between each pair of supply lines 4, in particular between each invert of the supply lines (detailed in Figures 2 and 3). The number of compartments and supply lines illustrated for this embodiment is given only as a non-limiting example.

[0078] Figure 2 schematically illustrates, without limitation, a cross-section of a blow-through duct. The blow-through duct 4 comprises a Coanda surface substantially shaped like an airplane wing. The blow-through duct 4 includes a slot 5, through which the surrounding compressed gas is blown as a jet, an intrados 6 having an aerodynamic profile to generate a Coanda effect, an extrados 8 that is substantially flat, and a leading edge 7 designed to face the flow of the surrounding gas (in other words, directed upstream). The jet-like blow-through, combined with the shape of the blow-through duct, draws the surrounding gas upstream of the blow-through duct 4, creating the suction effect. In the illustrated embodiment, the cross-section of the leading edge is substantially shaped like an arc of a circle.Figure 3 illustrates, schematically and without limitation, the flow of surrounding gas between two supply lines. In this figure, the shade of gray indicates the flow velocity of the surrounding gas: the lighter the gray, the higher the flow velocity. As can be seen in this figure, the surrounding gas injected through supply lines 4 has a high velocity and thus carries the surrounding gas upstream of the supply lines. The shape of the supply line generates this movement of the surrounding gas.

[0079] Figure 4 illustrates, schematically and without limitation, a capture system according to a second embodiment of the invention. Figure 4 is a cross-sectional view of the capture system. In this figure, the arrows illustrate the aerodynamic movement of the surrounding gas. The capture system 1 comprises three compartments 2 for absorbing or adsorbing the gaseous compound. The compartments 2 are substantially parallelepiped-shaped. The three compartments 2 are arranged one above the other. The capture system 1 also includes a suction device 3. For the illustrated embodiment, the suction device 3 is arranged upstream of the absorption or adsorption compartments 2, in the direction of flow of the surrounding gas. The suction device 3 comprises three pairs of blow-off ducts 4, having a substantially aircraft wing shape.In other words, the three pairs of supply lines 4 belong to the same suction device and generate an aerodynamic movement of the surrounding gas for a plurality of absorption or adsorption compartments 2. The surrounding gas is drawn between each pair of supply lines 4, in particular between each invert of the supply lines (detailed in Figures 2 and 3). The number of compartments and supply lines illustrated for this embodiment is given only as a non-limiting example.

[0080] Figure 5 schematically illustrates, without limitation, a capture system according to a third embodiment of the invention. Figure 4 is a cross-sectional view of the capture system. In this figure, the arrows illustrate the aerodynamic movement of the surrounding gas. The capture system 1 comprises three compartments 2 for absorbing or adsorbing the gaseous compound. The three compartments 2 are arranged one above the other. The capture system 1 also comprises a first suction device 3a. The first suction device 3a is arranged upstream of the absorption or adsorption compartments 2, in the direction of flow of the surrounding gas. The capture system 1 also comprises a second suction device 3b. The second suction device 3b is arranged downstream of the absorption or adsorption compartments 2, in the direction of flow of the surrounding gas.Each suction device 3a, 3b comprises three pairs of supply lines 4, substantially shaped like an airplane wing. In other words, the three pairs of supply lines 4 belong to the same suction device 3a or 3b and generate an aerodynamic movement of the gas for a plurality of absorption or adsorption compartments 2. The surrounding gas is drawn between each pair of supply lines 4, in particular between each invert of the supply lines (detailed in Figures 2 and 3). The number of compartments and supply lines illustrated for this embodiment is given only as a non-limiting example.

[0081] Figure 6 illustrates, schematically and without limitation, a second variant of a supply duct. Elements identical to those in Figure 2 are not detailed again. The supply duct 4 further includes an internal partition 9 that is impermeable or very slightly permeable to gas to limit the internal volume of the supply duct 4. The internal partition 9 is substantially perpendicular to the upper surface 8. Alternatively, the internal partition 9 may be inclined relative to the upper surface 8.

[0082] Figure 7 illustrates, schematically and without limitation, a suction device according to a first embodiment of the invention. Figure 7 is a front view of the suction device. The suction device 4 comprises an inlet 10 for the ambient gas, a compressor 11 for compressing the ambient gas from the inlet, distribution lines 12 for distributing the compressed ambient gas, and pairs of substantially horizontal supply lines 4 for supplying the compressed ambient gas from the distribution lines 12. Thus, the extracted ambient gas passes successively through the inlet 10, the compressor 11, the distribution lines 12, and the supply lines 4.

[0083] Figure 8 schematically and without limitation illustrates a collection system with a suction device according to a second embodiment of the invention. Figure 8 corresponds to the embodiment of Figure 1, in which the suction device 3 is specified. Elements identical to those in Figure 1 are not detailed again. In this embodiment, the suction device comprises, downstream of the collection system 1, a sampling means 17 for collecting the ambient gas from the collection system. The sampling means 17 is connected to the ambient gas inlet 10, which supplies the compressor 11, the distribution lines (not shown), and then the supply lines 4. Thus, the collected ambient gas passes successively through the sampling means 17, the inlet 10, the compressor 11, the distribution lines 12, and the supply lines 4.

[0084] Figure 9 illustrates, schematically and without limitation, a suction device according to a third embodiment of the invention. Figure 9 is a front view of the suction device. The suction device comprises an inlet 10, a compressor 11, a horizontal distribution line 12a connected to the compressor 11, a plurality of vertical distribution lines 12b connected to the horizontal distribution line 12a, and horizontal supply lines 4 connected to the vertical distribution lines 12b. These supply lines 4 are arranged opposite the absorption or adsorption compartments 2. Thus, the ambient gas drawn in passes successively through the inlet 10, the compressor 11, the horizontal distribution line 12a, the vertical distribution lines 12b, and the supply lines 4.Such a suction device can be arranged opposite a plurality of absorption or adsorption compartments (not shown). This embodiment can be combined with any of the other embodiments, in particular those described in relation to Figures 1, 4, 5, 7, and 8.

[0085] Figure 10 illustrates, schematically and without limitation, a suction device according to a fourth embodiment of the invention. Figure 10 is a front view of the suction device. The suction device comprises an inlet 10, a compressor 11, a horizontal distribution line 12a connected to the compressor 11, a plurality of vertical distribution lines 12b connected to the horizontal distribution line 12a by means of, in particular, shut-off valves 13, and horizontal supply lines 4 connected to the vertical distribution lines 12b. These supply lines 4 are arranged opposite the absorption or adsorption compartments 2. Thus, the surrounding gas taken from the intake passes successively through the inlet 10, the compressor 11, the horizontal distribution line 12a, the shut-off valves 13, the vertical distribution lines 12b, and the blow-off lines 4.Such a suction device can be arranged opposite a plurality of absorption or adsorption compartments (not shown). This embodiment can be combined with any of the other embodiments, in particular those described in relation to Figures 1, 4, 5, 7, and 8.

[0086] Figure 11 illustrates, schematically and without limitation, a suction device according to a fifth embodiment of the invention. Figure 11 is a front view of the suction device. The suction device comprises an inlet 10, a compressor 11, a horizontal distribution line 12a connected to the compressor 11, a plurality of vertical distribution lines 12b connected to the horizontal distribution line 12a by means of, in particular, shut-off valves 13, and horizontal supply lines 4 connected to the vertical distribution lines 12b. These supply lines 4 are arranged opposite the absorption or adsorption compartments 2. In addition, the suction device comprises a recirculation line 14 between an outlet of a distribution line 12b and an inlet of at least one distribution line 12a. In addition, the recirculation line includes a recirculation fan 15.Thus, the ambient gas extracted successively passes through the inlet 10, the compressor 11, the horizontal distribution line 12a, the shut-off valves 13, the vertical distribution lines 12b, and the supply lines 4. Furthermore, a portion of the compressed gas exits the vertical distribution lines 12b, passes through the recirculation line 14, and is reinjected into the horizontal distribution line 12a by means of a recirculation fan 15. Such a suction device can be arranged opposite a plurality of absorption or adsorption compartments (not shown). This embodiment can be combined with any of the other embodiments, in particular those described in relation to Figures 1, 4, 5, 7, and 8.

[0087] Figure 12 illustrates, schematically and without limitation, a suction device according to a sixth embodiment of the invention. Figure 12 is a front view of the suction device. The suction device comprises an inlet 10, a compressor 11, a vertical distribution line 12a connected to the compressor 11, a plurality of horizontal distribution lines 12b connected to the vertical distribution line 12a, and vertical supply lines 4 connected to the horizontal distribution lines 12b. Thus, the ambient gas extracted successively passes through the inlet 10, the compressor 11, the vertical distribution line 12a, the horizontal distribution lines 12b, and the supply lines 4. The difference in this embodiment is the orientation of the distribution lines 12a, 12b, and the supply lines 4.Such a suction device can be arranged opposite a plurality of absorption or adsorption compartments (not shown). This implementation is compatible with one of the embodiments described, in particular in Figures 1, 3, 5, 9 to 11.

[0088] Figure 13 schematically illustrates, without limitation, a suction device according to one embodiment of the invention. Figure 13 is a cross-sectional view of the extraction system. In this figure, the arrows illustrate the aerodynamic movement of the surrounding gas. The suction device comprises parallel counter blades 16 opposite the supply ducts 4, in the direction of the surrounding gas flow. Thus, the aerodynamic movement of the surrounding gas is modified first by the supply ducts 4 and then by the counter blades 16. The counter blades 16 have a cross-section substantially shaped like an airplane wing. Such a suction device can be arranged opposite a plurality of absorption or adsorption compartments (not shown) to improve flow efficiency.This embodiment can be combined with all the configurations described above, in particular those of Figures 1, 3, 5, and 7 to 12. Figure 14 illustrates, schematically and without limitation, a suction device according to a seventh embodiment of the invention. Figure 14 is a front view of the suction device. The suction device comprises an inlet 10, a compressor 11, a vertical distribution line 12a connected to the compressor 11, a plurality of horizontal distribution lines 12b connected to the vertical distribution line 12a, and vertical supply lines 4 connected to the horizontal distribution lines 12b. In addition, the distribution line 12a includes a heat exchanger 18 to capture heat from the surrounding compressed gas and reduce the temperature of the surrounding blown gas.Thus, the extracted ambient gas successively passes through the inlet 10, the compressor 11, the vertical distribution line 12a, the heat exchanger 18, the horizontal distribution lines 12b, and the supply lines 4. The difference in this implementation lies in the orientation of the distribution lines 12a, 12b, and the supply lines 4. Such a suction device can be arranged opposite a plurality of absorption or adsorption compartments (not shown). This implementation is compatible with one of the embodiments described, in particular in Figures 1, 3, 5, and 9 to 12.

[0089] Figure 15 illustrates, schematically and without limitation, a suction device according to a seventh embodiment of the invention. Figure 15 is a front view of the suction device. The suction device comprises an inlet 10, a compressor 11, a vertical distribution line 12a connected to the compressor 11, a plurality of horizontal distribution lines 12b connected to the vertical distribution line 12a, and vertical supply lines 4 connected to the horizontal distribution lines 12b. Furthermore, the inlet 10 includes a gaseous compound absorption or adsorption means 19 to capture the gaseous compound. Thus, the surrounding gas passing through the compressor 10 has a reduced gaseous compound content. In addition, the distribution line 12a includes a heat exchanger 18 to capture heat from the compressed surrounding gas and reduce the temperature of the supplied surrounding gas.Thus, the extracted ambient gas successively passes through inlet 10, compressor 11, vertical distribution line 12a, heat exchanger 18, horizontal distribution lines 12b, and supply lines 4. The difference in this implementation lies in the orientation of the distribution lines 12a, 12b, and supply lines 4. Such a suction device can be arranged opposite a plurality of absorption or adsorption compartments (not shown). This variant is shown with a heat exchanger; however, the latter is optional. This implementation is compatible with any of the embodiments described, in particular in Figures 1, 3, 5, and 9 to 12.

Claims

Demands 1. A system for capturing a gaseous compound, in particular carbon dioxide, from a surrounding gas, in particular air, comprising at least one compartment (2) for absorbing or adsorbing said gaseous compound and at least one suction device (3) for drawing in said surrounding gas to generate a flow of the surrounding gas through at least one compartment (2) for absorbing or adsorbing, said compartment (2) for absorbing or adsorbing said gaseous compound comprising at least one absorbing or adsorbing medium for said gaseous compound, characterized in that each suction device (3) comprises at least one Coanda-effect blowing duct (4) for said surrounding gas.

2. A gaseous compound capture system according to claim 1, wherein said suction device (3) comprises an inlet (10) of said surrounding gas, a compressor (11) connected to said inlet (10), at least one distribution line (12) connected to said compressor (11), at least one Coanda effect blowing line (4) connected to at least one distribution line (12).

3. A gaseous compound capture system according to claim 2, wherein said suction device (3) comprises at least one shut-off valve (13) on at least one distribution line (12).

4. A gaseous compound capture system according to any one of claims 2 or 3, wherein said suction device (3) comprises a recirculation line (14) between an outlet and an inlet of at least one distribution line (12), preferably said recirculation line (14) comprises a recirculation fan (15).

5. A gaseous compound capture system according to any one of claims 2 to 4, wherein said suction device (3) comprises a heat exchanger (18) arranged on a distribution line (12).

6. A gaseous compound capture system according to any one of the preceding claims, wherein each suction device (3) is arranged to generate a flow of said surrounding gas through a plurality of absorption or adsorption compartments (2).

7. A gaseous compound capture system according to any one of the preceding claims, wherein at least one suction device (3) is arranged downstream of each absorption or adsorption compartment (2) in the direction of flow of the surrounding gas.

8. A system for capturing a gaseous compound according to any one of the preceding claims, in which at least one suction device (3) is arranged upstream of each compartment (2) of absorption or adsorption in the direction of flow of the surrounding gas.

9. A gaseous compound capture system according to any one of the preceding claims, wherein each blowing duct (4) comprises a substantially aircraft wing-shaped section and a slot (5) for the passage of the surrounding gas.

10. A gaseous compound capture system according to any one of the preceding claims, wherein each blowing duct (4) includes a partition (9) to reduce the gas passage cross-section. 1 1. System for capturing a gaseous compound according to any one of the preceding claims, wherein said supply lines (4) are horizontal or vertical.

12. A gaseous compound capture system according to any one of the preceding claims, wherein said suction device (3) comprises at least one counter blade (16) parallel to the blow-through pipe downstream of said blow-through pipe in the direction of flow of the surrounding gas.

13. A gaseous compound capture system according to any one of the preceding claims, wherein said system comprises a plurality of absorption or adsorption compartments (2) arranged side by side and / or above each other.

14. A gaseous compound capture system according to any one of the preceding claims, wherein the surrounding gas suction device (3) includes a means for absorbing or adsorbing (19) the gaseous compound.

15. A gaseous compound capture system according to any one of the preceding claims, wherein said surrounding gas suction device (3) comprises at least one pair of parallel blowing ducts (4).

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