Carbon dioxide adsorption device

Abstract

The invention discloses a carbon dioxide adsorption device. The carbon dioxide adsorption device comprises a sheet-shaped base material; the adsorption material is attached to the surface of the sheet-shaped base material; the heating structure is used for heating the sheet-shaped base material; and the supporting structure is used for supporting the sheet-shaped base material. According to the carbon dioxide adsorption device provided by the invention, the sheet-shaped base material is supported by the supporting structure, so that the adsorption material attached to the surface of the sheet-shaped base material can be prevented from being limited by high pressure drop and mass transfer resistance, and the adsorption efficiency of the adsorption material on carbon dioxide is kept on the basis of realizing low pressure drop; moreover, the heating structure is used for heating the sheet-shaped base material, so that the temperature can be uniformly distributed on the adsorption material, and the adsorption material can desorb carbon dioxide. Through the arrangement, the productivity is effectively improved, and the energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of carbon dioxide adsorption equipment technology, and particularly to a carbon dioxide adsorption device. Background Technology

[0002] The carbon dioxide content in the air is about 0.04%, which means that obtaining 1 kilogram of carbon dioxide would require at least 1400 meters. 3 Air. At such high ventilation rates, the use of spherical particle packed beds is limited by high pressure drop and mass transfer resistance, resulting in lower productivity and higher energy consumption, and significantly increasing investment and operating costs.

[0003] Therefore, how to improve productivity and reduce energy consumption is an urgent problem to be solved by personnel in this technical field. Summary of the Invention

[0004] In view of this, the present invention provides a carbon dioxide adsorption device to improve productivity and reduce energy consumption.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A carbon dioxide adsorption device, comprising:

[0007] Sheet substrate;

[0008] An adsorbent material, wherein the adsorbent material is attached to the surface of the sheet-like substrate;

[0009] A heating structure for heating the sheet-like substrate;

[0010] A support structure for supporting the sheet-like substrate.

[0011] Optionally, in the above-mentioned carbon dioxide adsorption device, the sheet-like substrate is a thin film material with a thickness ranging from 0.1 to 1 mm.

[0012] Optionally, in the above-mentioned carbon dioxide adsorption device, the adsorption material is a particulate solid amine material, and the particle size of the particulate solid amine material ranges from 0.3 to 1 mm.

[0013] Optionally, in the above-mentioned carbon dioxide adsorption device, the particles in the granular solid amine material have a uniform particle size and form a smooth air-passing surface;

[0014] And / or,

[0015] The granular solid amine material is evenly spread on the surface of the sheet substrate and adhered by an adhesive material, and then compacted and rolled flat.

[0016] And / or,

[0017] The particulate solid amine material is attached to one or both sides of the sheet-like substrate.

[0018] Optionally, in the above-mentioned carbon dioxide adsorption device, the sheet-like substrate is made of insulating material;

[0019] The heating structure is a graphene material disposed on the sheet-like substrate, so that the graphene material layer disposed on the sheet-like substrate can heat the sheet-like substrate when energized.

[0020] Optionally, in the above-mentioned carbon dioxide adsorption device, the support structure includes:

[0021] A support sheet connected to the side of the sheet-like substrate;

[0022] A support strip connected to the middle region of the sheet-like substrate.

[0023] Optionally, in the above-described carbon dioxide adsorption device, the thickness of the support sheet and / or the support strip ranges from 1 to 3 mm, and the direction of the thickness is the arrangement direction of the support strip and the sheet-like substrate; and / or,

[0024] The width of the support sheet ranges from 5-10 mm, and the direction of the width is the arrangement direction of the side edges on both sides of the sheet-like substrate; and / or,

[0025] The width of the support strip ranges from 1 to 3 mm, and the direction of the width is the arrangement direction of the side edges on both sides of the sheet-like substrate; and / or,

[0026] The support sheet and / or the support strip are connected to the sheet substrate by an adhesive material.

[0027] Optionally, in the above-mentioned carbon dioxide adsorption device, there are multiple sheet-like substrates, and an airflow channel is provided between two adjacent sheet-like substrates.

[0028] Optionally, in the above-mentioned carbon dioxide adsorption device, the height of the airflow channel ranges from 1 to 3 mm, and the direction of the height is the arrangement direction of two adjacent sheet-like substrates; and / or,

[0029] The air passage length of the carbon dioxide adsorption device is 200-1000 times the height of the airflow channel.

[0030] Optionally, the carbon dioxide adsorption device described above also includes a housing, in which the sheet-like substrate is disposed in a stacked or wound manner.

[0031] As can be seen from the above technical solution, the carbon dioxide adsorption device provided by the present invention supports the sheet-like substrate through a support structure, allowing the adsorption material attached to the surface of the sheet-like substrate to avoid the limitations of high pressure drop and mass transfer resistance. This maintains the adsorption efficiency of the adsorption material for carbon dioxide while achieving a low pressure drop. Furthermore, the heating structure is used to heat the sheet-like substrate, thereby ensuring a uniform temperature distribution on the adsorption material, enabling the adsorption material to desorb carbon dioxide. Through these features, productivity is effectively improved and energy consumption is reduced. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A schematic diagram of the combined structure of the sheet-like substrate, adsorption material, heating structure and support structure provided in an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of a carbon dioxide adsorption device provided in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of another carbon dioxide adsorption device provided in an embodiment of the present invention.

[0036] in,

[0037] Sheet substrate-1;

[0038] Adsorbent material-2;

[0039] Heating structure -3;

[0040] Support plate -4;

[0041] Opening -5;

[0042] Support bar -6;

[0043] Outer shell - 7;

[0044] Airflow channel -8. Detailed Implementation

[0045] This invention discloses a carbon dioxide adsorption device to improve productivity and reduce energy consumption.

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] like Figure 1 As shown, this embodiment of the invention provides a carbon dioxide adsorption device, including a sheet-like substrate 1, an adsorption material 2, a heating structure 3, and a supporting structure. The adsorption material 2 is attached to the surface of the sheet-like substrate 1; the heating structure 3 is used to heat the sheet-like substrate 1; and the supporting structure is used to support the sheet-like substrate 1.

[0048] The carbon dioxide adsorption device provided in this embodiment of the invention supports the sheet-like substrate 1 through a support structure, allowing the adsorption material 2 attached to the surface of the sheet-like substrate 1 to avoid the limitations of high pressure drop and mass transfer resistance. This maintains the adsorption efficiency of the adsorption material 2 for carbon dioxide while achieving a low pressure drop. Furthermore, the heating structure 3 heats the sheet-like substrate 1, ensuring a uniform temperature distribution on the adsorption material 2, enabling the adsorption material 2 to desorb carbon dioxide. Through these features, productivity is effectively improved and energy consumption is reduced.

[0049] In this embodiment, the sheet substrate 1 is a thin film material with a thickness ranging from 0.1 to 1 mm. It is understood that the selection of the sheet substrate 1 is crucial. To ensure service life and performance, the sheet substrate 1 needs to possess good mechanical properties, thermal stability, chemical stability, and resistance to high and low temperatures.

[0050] The inventors discovered that the application of traditional spherical particulate adsorbents is limited due to low throughput. To meet the demands for high throughput, low pressure drop, low energy consumption, and high productivity, methods such as coating powdered adsorbent onto a substrate or pulverizing spherical particulate adsorbent material 2 and then coating it onto a substrate can achieve high throughput and low pressure drop. However, the efficiency for capturing carbon dioxide from lower concentrations of air is relatively low. In particular, the method of pulverizing spherical particulate adsorbent material 2 and then coating it onto a substrate reduces the performance of the original adsorbent material 2 by 30%.

[0051] To ensure the adsorption rate, in the carbon dioxide adsorption device provided in this embodiment of the invention, the adsorption material 2 is a particulate solid amine material, and the particle size of the particulate solid amine material ranges from 0.3 to 1 mm. The solid amine carrier can be a high specific surface area and porous material such as zeolite, silica, alumina, or polymer. The particulate solid amine material is a combination structure of the aforementioned carrier particles and solid amine.

[0052] The preferred material is a spherical granular polymeric solid amine material with a particle size range of 0.3-1 mm. More specifically, the optimal particle size range is 0.3-0.5 mm. After the granular solid amine material is attached to the sheet-like substrate 1, a relatively flat surface is formed, reducing disturbance to airflow.

[0053] In this embodiment, the particles in the granular solid amine material have a uniform particle size and form a smooth airflow surface. Uniform particle size means that the difference in particle size between any two particles in the granular solid amine material is within an allowable range. This allowable range can be determined based on actual needs. The airflow surface is the surface where the airflow (air) contacts the granular solid amine material.

[0054] To facilitate the adhesion of granular solid amine material to the surface of sheet substrate 1, the granular solid amine material is evenly laid on the surface of sheet substrate 1 and adhered by adhesive material, and then compacted and rolled flat.

[0055] Preferably, the particulate solid amine material is attached to one or both sides of the sheet substrate 1. In this embodiment, it is preferable that the particulate solid amine material is attached to both sides of the sheet substrate 1. Alternatively, the particulate solid amine material may be attached to a predetermined area on the surface of the sheet substrate 1; no specific limitation is made here, and all are within the scope of protection.

[0056] The inventors discovered that most carbon dioxide adsorption devices use steam heating, which results in built-in steam pipes occupying significant space and sometimes requiring dedicated electric steam generators. Furthermore, since the heat transfer performance of the adsorbent material 2 is generally low, indirect heating methods, such as steam flowing through steam pipes and heating the adsorbent material 2 directly, lead to longer heating times and affect the uniformity of heating. While direct steam heating of the adsorbent material 2 provides uniform heating, it causes the steam to condense into water upon cooling, leaving a significant amount of moisture inside the carbon dioxide adsorption device, which is detrimental to subsequent operations (such as the next carbon dioxide adsorption cycle).

[0057] Therefore, in order to simplify the carbon dioxide adsorption device, improve energy efficiency, and enable the adsorption material 2 to be heated quickly and uniformly, in the carbon dioxide adsorption device provided in this embodiment of the invention, the sheet substrate 1 is made of insulating material; the heating structure 3 is graphene material disposed on the sheet substrate 1, so that the graphene material layer disposed on the sheet substrate 1 can heat the sheet substrate 1 when energized.

[0058] The sheet substrate 1 needs to meet the environmental changes (such as high and low temperature cycles and vacuum environment) during the carbon dioxide adsorption cycle of the carbon dioxide adsorption device, as well as the high insulation performance during the electric heating process of the graphene material. Therefore, the sheet substrate 1 is preferably a thin film material of polyester (PET, polyethylene terephthalate), polymethyl methacrylate (PMMA), polyimide (PI), or polystyrene (PS). Preferably, the thickness of the thin film material used as the sheet substrate 1 is in the range of 0.1-0.5 mm.

[0059] Graphene material can be coated onto a sheet-like substrate 1 to form a sheet-like substrate 1 with heating function. Each sheet-like substrate 1 has pre-reserved wiring terminals for heating the graphene by electricity. Figure 1 As shown, the coating area of ​​the graphene material can be the region between the two dashed lines.

[0060] Graphene heating primarily heats the entire surface of the sheet-like substrate 1 through radiation, resulting in a uniform temperature distribution. This allows for rapid and even heating of the adsorbent material 2 attached to the surface of the sheet-like substrate 1. Taking the adsorbent material 2 as a particulate solid amine material as an example, graphene heating can complete the temperature rise within 5-10 minutes and the desorption process of the adsorbent material 2 can be completed within 10-20 minutes.

[0061] The use of electric heating to heat the adsorbent material 2 (solid amine) makes the desorption of adsorbent material 2 (solid amine) particularly suitable for situations where green electricity is abundant but difficult to utilize. It eliminates the need to first convert electrical energy into steam and then use steam to regenerate adsorbent material 2 (solid amine), which simplifies the equipment and further saves energy consumption.

[0062] To facilitate the fabrication of the carbon dioxide adsorption device, the sheet material used to make the sheet substrate 1 can be cut as needed. That is, after attaching the adsorption material 2 (and coating it with graphene) to a whole sheet material, it is cut to the required size as needed to form the sheet substrate 1 with the adsorption material 2 attached (and coated with graphene). The sheet substrate 1 is then supported by a support structure to form the carbon dioxide adsorption device.

[0063] In some embodiments, the support structure includes support sheets 4 connected to the sides of the sheet substrate 1 and support strips 6 connected to the middle region of the sheet substrate 1. That is, support sheets 4 are connected to both sides of the cut sheet substrate 1. The support sheets 4 may possess thermal stability, chemical stability, and high and low temperature resistance, as well as certain strength and toughness, and are made of materials such as PP (polypropylene), aluminum alloy, or stainless steel. The support strip 6 is connected to the middle region of the cut sheet substrate 1. The support strip 6 may be made of a material with the same properties as the support sheets 4, and together with the support sheets 4, increases the strength of the sheet substrate 1.

[0064] The central area of ​​the sheet substrate 1 can be any area of ​​the sheet substrate 1 excluding the edges. Therefore, the support sheet 4 and the support strip 6 respectively support the edge and non-edge areas of the sheet substrate 1, ensuring the support structure's effectiveness in supporting the sheet substrate 1. Alternatively, only the support sheet 4 or the support strip 6 can be provided according to actual needs, or a support frame or other structures can be provided; no specific restrictions are imposed here, and all are within the scope of protection.

[0065] The carbon dioxide adsorption device provided in this embodiment of the invention has a thickness of 1-3 mm for the support sheet 4 and / or support strip 6, and the direction of the thickness is the arrangement direction of the support strip 6 and the sheet substrate 1.

[0066] In a carbon dioxide adsorption device having multiple sheet-like substrates 1 stacked together, the support sheet 4 and / or support strip 6 connected on two adjacent sheet-like substrates 1 can be in contact, or the support sheet 4 and / or support strip 6 of one of the two adjacent sheet-like substrates 1 can be in contact with the surface of the other sheet-like substrate 1, thereby forming an airflow channel 8 of at least 1-3 mm between the two adjacent sheet-like substrates 1, so that gas (air) can flow through the airflow channel 8 between the two adjacent sheet-like substrates 1 and come into contact with the adsorption material 2 attached to the opposite surfaces of the two adjacent sheet-like substrates 1.

[0067] To ensure support strength, the width of the support piece 4 ranges from 5-10 mm, and the direction of its width is the same as the arrangement direction of the side edges of the sheet-like substrate 1. For example... Figure 1 As shown, the width of support piece 4 is Figure 1 The horizontal direction is shown.

[0068] Preferably, the width of the support strip 6 is in the range of 1-3 mm, and the direction of the width is the arrangement direction of the side edges of the sheet substrate 1. For example... Figure 1 As shown, the width of support bar 6 is Figure 1 The horizontal direction is shown.

[0069] In this embodiment, the support sheet 4 and / or support strip 6 are connected to the sheet substrate 1 by an adhesive material. The adhesive material can be a liquid adhesive or double-sided tape, etc.

[0070] For easy fixing, the support plate 4 has openings 5 ​​extending through both sides, and the portion of the sheet-like substrate 1 corresponding to the openings 5 ​​is a hollow structure. During the fixing of the sheet-like substrate 1, connecting parts such as through screws can pass through the openings 5 ​​and connect to a housing containing gas (air), allowing the sheet-like substrate 1 to be assembled into the corresponding housing. The housing can be the outer shell 7 of the carbon dioxide adsorption device, or the housing of equipment used in conjunction with the carbon dioxide adsorption device.

[0071] Furthermore, there are multiple sheet-like substrates 1, and an airflow channel 8 is provided between two adjacent sheet-like substrates 1.

[0072] To ensure structural compactness and smooth airflow, the height of the airflow channel 8 is preferably in the range of 1-3 mm, and the direction of the height is the arrangement direction of two adjacent sheet substrates 1.

[0073] In some embodiments, the air passage length of the carbon dioxide adsorption device is preferably set to 200-1000 times the height of the airflow channel 8. The air passage length of the carbon dioxide adsorption device is the length of the airflow passing through the single sheet substrate 1. Therefore, the air passage length can be the length of the sheet substrate 1 along the airflow direction.

[0074] like Figure 2 As shown, in some embodiments, the carbon dioxide adsorption device further includes a housing 7, within which sheet-like substrates 1 are stacked. The sheet-like substrates 1, adsorption material 2, heating structure 3, and support structure are all located within the housing 7. The housing 7 has an inlet duct, an outlet duct, an inlet valve corresponding to the inlet duct, and an outlet valve corresponding to the outlet duct. A filter is installed on the inlet side, and a fan is installed on the outlet side. Multiple sheet-like substrates 1 are stacked, and an airflow channel 8 is formed between adjacent sheet-like substrates 1 through the support structure (supporting plates 4 and supporting strips 6). The housing 7 is preferably a square housing 7, and the sheet-like substrates 1 can be square, assembled into the square housing 7 by the supporting plates 4.

[0075] like Figure 3As shown, in some embodiments, the carbon dioxide adsorption device further includes a housing 7, within which a sheet-like substrate 1 is wound. The housing 7 has an inlet duct, an outlet duct, an inlet valve corresponding to the inlet duct, and an outlet valve corresponding to the outlet duct. A filter is installed on the inlet side, and a fan is installed on the outlet side. The sheet-like substrate 1 is wound to form a cylindrical structure, and an airflow channel 8 is formed between adjacent layers of sheet-like substrate 1 by support strips 6. Preferably, the housing 7 is a cylindrical housing 7, assembled into the cylindrical housing 7 by support pieces 4 located at the center or outer side of the cylindrical structure.

[0076] The capture of carbon dioxide from the air generally follows a cyclical process involving adsorption, venting, heating, vacuuming, and cooling. During adsorption, the inlet and outlet valves are opened. When the carbon dioxide concentration at the outlet is less than 100 ppm, the fan is turned off, and the inlet and outlet valves are closed. Subsequently, a vacuum pump removes the residual air from the outer casing 7 of the carbon dioxide adsorption device, maintaining the pressure inside the device at 10-20 kPa. The heating structure 3 (electrically energized graphene material) heats the adsorption material 2 (solid amine material) to 90-100℃, initiating carbon dioxide desorption. The vacuum pump continues to operate, drawing the desorbed carbon dioxide into a storage tank. At this point, carbon dioxide with a purity of over 95% can be obtained.

[0077] In this embodiment, the adsorption time, apparent rate, pressure drop, and desorption time can be adjusted according to actual needs, and no specific limitations are imposed here.

[0078] Carbon dioxide adsorption devices can achieve adsorption processes with varying temperature, varying pressure, or a combination of both.

[0079] In situations where high-purity carbon dioxide is not required, such as in agricultural planting, heating structure 3 (graphene material energized) heats adsorbent material 2 (solid amine material) to 90-100℃, causing carbon dioxide to desorb and then be delivered to the appropriate location (such as an agricultural greenhouse) by an exhaust fan.

[0080] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0081] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A carbon dioxide adsorption device, characterized in that, include: Sheet substrate; An adsorbent material, wherein the adsorbent material is attached to the surface of the sheet-like substrate; A heating structure for heating the sheet-like substrate; A support structure for supporting the sheet-like substrate.

2. The carbon dioxide adsorption device as described in claim 1, characterized in that, The sheet-like substrate is a thin film material with a thickness ranging from 0.1 to 1 mm.

3. The carbon dioxide adsorption device as described in claim 1, characterized in that, The adsorbent material is a particulate solid amine material, and the particle size of the particulate solid amine material ranges from 0.3 to 1 mm.

4. The carbon dioxide adsorption device as described in claim 3, characterized in that, The particles in the granular solid amine material have a uniform particle size and form a smooth, air-permeable surface. And / or, The granular solid amine material is evenly spread on the surface of the sheet substrate and adhered by an adhesive material, and then compacted and rolled flat. And / or, The particulate solid amine material is attached to one or both sides of the sheet-like substrate.

5. The carbon dioxide adsorption device as described in claim 1, characterized in that, The sheet-like substrate is made of insulating material; The heating structure is a graphene material disposed on the sheet-like substrate, so that the graphene material layer disposed on the sheet-like substrate can heat the sheet-like substrate when energized.

6. The carbon dioxide adsorption device as described in claim 1, characterized in that, The support structure includes: A support sheet connected to the side of the sheet-like substrate; A support strip connected to the middle region of the sheet-like substrate.

7. The carbon dioxide adsorption device as described in claim 6, characterized in that, The thickness of the support sheet and / or the support strip ranges from 1 to 3 mm, and the direction of the thickness is the alignment direction of the support strip and the sheet-like substrate; and / or, The width of the support sheet ranges from 5-10 mm, and the direction of the width is the arrangement direction of the side edges on both sides of the sheet-like substrate; and / or, The width of the support strip ranges from 1 to 3 mm, and the direction of the width is the arrangement direction of the side edges on both sides of the sheet-like substrate; and / or, The support sheet and / or the support strip are connected to the sheet substrate by an adhesive material.

8. The carbon dioxide adsorption device as described in claim 1, characterized in that, The number of sheet-like substrates is multiple, and there is an airflow channel between two adjacent sheet-like substrates.

9. The carbon dioxide adsorption device as described in claim 8, characterized in that, The height of the airflow channel ranges from 1 to 3 mm, and the direction of the height is the arrangement direction of two adjacent sheet-like substrates; and / or, The air passage length of the carbon dioxide adsorption device is 200-1000 times the height of the airflow channel.

10. The carbon dioxide adsorption device according to any one of claims 1-9, characterized in that, It also includes a housing, in which the sheet substrate is disposed in a stacked or wound manner.

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