Direct air carbon capture device and direct air carbon capture control system

Abstract

The embodiment of the utility model provides a direct air carbon capture device and a direct air carbon capture control system, and belongs to the technical field of carbon emission reduction. The device comprises an adsorption cavity, a temperature swing adsorption module, a humidity swing adsorption module, an adsorbent heating module and a humidity control module, the variable-humidity adsorption module is arranged in the adsorption cavity and is positioned between the air outlet and the variable-temperature adsorption module; air flows through the temperature swing adsorption module from the air inlet, the temperature swing adsorption module carries out carbon dioxide adsorption action and drying treatment on the air, the dried air flows through the humidity swing adsorption module, and the humidity swing adsorption module is used for carrying out carbon dioxide adsorption action on the dried air; the adsorbent heating module is used for heating the temperature swing adsorption module and the humidity swing adsorption module, the humidity control module is used for humidifying the interior of the adsorption cavity, and the temperature swing adsorption module and the humidity swing adsorption module are used for desorption so as to desorb carbon dioxide gas. According to the embodiment of the invention, the carbon dioxide trapping efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon emission reduction, and particularly relates to a direct air carbon capture device and a direct air carbon capture control system. BACKGROUND

[0002] Direct air capture (DAC) technology is a technology for directly separating and storing carbon dioxide from the atmosphere, which can remove carbon dioxide from the atmosphere and achieve carbon emission reduction. At present, the efficiency of carbon dioxide capture is low. For example, the current direct air capture device often uses a heating method to make the thermal swing adsorbent desorb carbon dioxide gas, and the capture efficiency is low.

[0003] Therefore, how to improve the carbon dioxide capture efficiency has become a technical problem to be solved. CONTENT OF THE INVENTION

[0004] The main purpose of the embodiment of the present application is to provide a direct air carbon capture device and a direct air carbon capture control system, which aims to improve the carbon dioxide capture efficiency.

[0005] To achieve the above-mentioned purpose, the first aspect of the embodiment of the present application provides a direct air carbon capture device, which comprises:

[0006] An adsorption cavity, a first end of the adsorption cavity is provided with an air outlet and a water inlet, and a second end of the adsorption cavity is provided with an air inlet;

[0007] A thermal swing adsorption module, the thermal swing adsorption module is arranged inside the adsorption cavity;

[0008] A humidity swing adsorption module, the humidity swing adsorption module is arranged inside the adsorption cavity and located between the air outlet and the thermal swing adsorption module;

[0009] An adsorbent heating module, the adsorbent heating module is arranged inside the adsorption cavity;

[0010] A humidity control module, the humidity control module is connected to the water inlet;

[0011] When the air inlet and the air outlet are both in an open state, air flows through the thermal swing adsorption module from the air inlet, the thermal swing adsorption module is used for carbon dioxide adsorption action and drying treatment of the air, and the dried air flows through the humidity swing adsorption module, the humidity swing adsorption module is used for carbon dioxide adsorption action of the dried air.

[0012] When the gas inlet and the gas outlet are both in a closed state, the adsorbent heating module is configured to heat the temperature swing adsorption module and the humidity swing adsorption module, the humidity control module is configured to humidify the inside of the adsorption cavity, and the temperature swing adsorption module and the humidity swing adsorption module are configured to desorb carbon dioxide gas.

[0013] In some embodiments, the humidity swing adsorption module, the temperature swing adsorption module, and the adsorbent heating module are sequentially arranged in the inside of the adsorption cavity from a first end to a second end.

[0014] In some embodiments, the temperature swing adsorption module and the humidity swing adsorption module are arranged separately in the inside of the adsorption cavity.

[0015] In some embodiments, the device further comprises:

[0016] An outlet gas control module, the outlet gas control module comprising a vacuum pump and a gas collection device;

[0017] One end of the vacuum pump is connected to the gas outlet, and the other end of the vacuum pump is connected to the gas collection device.

[0018] The vacuum pump is configured to perform a vacuumizing action on the inside of the adsorption cavity, so that the inside of the adsorption cavity is in a vacuum state, so that the temperature swing adsorption module and the humidity swing adsorption module desorb carbon dioxide gas; the vacuum pump is also configured to extract the desorbed carbon dioxide gas from the gas outlet, so that the carbon dioxide gas is collected into the gas collection device.

[0019] In some embodiments, the outlet gas control module further comprises a gas drying module;

[0020] The gas drying module is connected between the gas outlet and one end of the vacuum pump; the gas drying module is configured to dry the desorbed carbon dioxide gas.

[0021] In some embodiments, the humidity control module comprises a water mist generator, a water flow meter, a water temperature sensor, and a water pressure sensor; the device further comprises a water mist sprayer;

[0022] The water mist sprayer is arranged in the inside of the adsorption cavity, and the water mist generator is connected to the water mist sprayer; the water flow meter, the water temperature sensor, and the water pressure sensor are respectively connected to the water mist generator.

[0023] The water mist generator is configured to atomize water, so that water mist is sprayed from the water mist sprayer to the humidity swing adsorption module.

[0024] In some embodiments, the device further comprises:

[0025] an inlet gas control module; the inlet gas control module comprises an air pump, an air heating module, an air flow meter, an air pressure sensor, an air temperature sensor, and an air humidity sensor;

[0026] The air pump is connected to the air heating module, the air heating module is connected to the air inlet, the air heating module, the air flow meter, the air pressure sensor, the air temperature sensor, and the air humidity sensor are respectively connected to the air heating module, the air pump is used to drive air to flow through the air heating module and into the adsorption cavity from the air inlet.

[0027] In some embodiments, the device further comprises:

[0028] a support seat connected to the adsorption cavity, the support seat being used to support the direct air carbon capture device;

[0029] a weighing table on which the support seat is placed, the weighing table being used to weigh the total weight of the direct air carbon capture device and the gas inside the adsorption cavity;

[0030] a flow uniformization plate arranged inside the adsorption cavity and between the air inlet and the temperature swing adsorption module, the flow uniformization plate being used to make air flow uniformly into the adsorption cavity.

[0031] In some embodiments, the device further comprises a carbon dioxide concentration sensor, an intra-cavity temperature sensor, an intra-cavity humidity sensor, and an intra-cavity pressure sensor.

[0032] The carbon dioxide concentration sensor, the intra-cavity temperature sensor, the intra-cavity humidity sensor, and the intra-cavity pressure sensor are all arranged inside the adsorption cavity, the carbon dioxide concentration sensor is used to detect the carbon dioxide concentration inside the adsorption cavity, the intra-cavity temperature sensor is used to detect the temperature inside the adsorption cavity, the intra-cavity humidity sensor is used to detect the humidity inside the adsorption cavity, and the intra-cavity pressure sensor is used to detect the pressure inside the adsorption cavity.

[0033] To achieve the above object, a second aspect of the embodiments of the present application proposes a direct air carbon capture control system, which comprises the direct air carbon capture device of the first aspect and a controller.

[0034] The controller is communicatively connected to the direct air carbon capture device, the controller is used to control the opening or closing of the air inlet and the air outlet, and control the heating action of the adsorbent heating module on the temperature swing adsorption module and the humidity swing adsorption module.

[0035] The direct air carbon capture device and the direct air carbon capture control system provided by the application set the variable humidity adsorption module between the gas outlet and the variable temperature adsorption module to ensure that the gas flows through the variable temperature adsorption module first and then flows through the variable humidity adsorption module inside the adsorption cavity; when the inlet and the outlet are both open, the variable temperature adsorption module adsorbs carbon dioxide in the air, and at the same time, the air is dried, the dried air flows through the variable humidity adsorption module, and the variable humidity adsorption module performs carbon dioxide adsorption on the dried air to improve the adsorption efficiency of the variable humidity adsorption module; when the inlet and the outlet are both closed, the humidity control module performs humidification on the inside of the adsorption cavity, and the adsorbent heating module simultaneously heats the variable temperature adsorption module and the variable humidity adsorption module, thereby improving the desorption efficiency of the variable temperature adsorption module and the variable humidity adsorption module; the combination of the variable temperature adsorption module and the variable humidity adsorption module can improve the efficiency of carbon dioxide adsorption and desorption, thereby improving the carbon dioxide capture efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a module block diagram of the direct air carbon capture device provided by the embodiment of the application;

[0037] Figure 2 is a specific implementation schematic diagram of the direct air carbon capture device provided by an embodiment of the application;

[0038] Figure 3 is a specific implementation schematic diagram of the direct air carbon capture device provided by another embodiment of the application;

[0039] Figure 4 is a specific implementation schematic diagram of the direct air carbon capture device provided by another embodiment of the application;

[0040] Figure 5 is a specific implementation schematic diagram of the direct air carbon capture device provided by another embodiment of the application;

[0041] Figure 6 is a module block diagram of the direct air carbon capture control system provided by the embodiment of the application.

[0042] Reference signs: 10, adsorption cavity; 20, variable temperature adsorption module; 30, variable humidity adsorption module; 40, adsorbent heating module; 50, humidity control module; 51, water mist generator; 60, outlet gas control module; 61, vacuum pump; 62, gas collection device; 63, gas drying module; 70, water mist spraying head; 80, inlet gas control module; 81, air pump; 82, air heating module. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0044] It should be noted that although the device schematics illustrate functional module divisions and the flowcharts illustrate logical sequences, in certain circumstances, the steps shown or described may be performed in a sequence that differs from the module divisions in the device or the sequence in the flowcharts. The terms "first," "second," and so on, in the specification, claims, and drawings, are used to distinguish similar items and are not necessarily used to describe a specific sequence or precedence.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0046] First, let’s analyze some of the terms used in this application:

[0047] Carbon capture and storage (CCS) refers to technologies that capture carbon dioxide from industrial processes through various means and then store or utilize it. Carbon capture technologies include direct air capture.

[0048] Direct Air Capture (DAC) is a carbon reduction technology. It captures carbon dioxide directly from the air, compresses it, and stores it in a secure location, effectively removing it from the atmosphere. Currently, DAC is attracting widespread attention as an important and rare negative carbon reduction method.

[0049] Metal-organic frameworks (MOFs) are porous materials with periodic network structures formed by the self-assembly of metal ions or metal clusters and organic ligands. MOFs have high specific surface area, high pore volume, and a porous structure.

[0050] ‌‌Desorption process: also known as desorption process, is the reverse process of gas absorption or adsorption. In the desorption process, the adsorbed substance (such as carbon dioxide gas) is released from the adsorbent by pressurization, decompression or heating.

[0051] The direct air carbon capture device and the direct air carbon capture control system provided by the embodiments of the present application are specifically described through the following embodiments. First, the direct air carbon capture control method in the embodiments of the present application is described.

[0052] Figure 1 is an optional module block diagram of the direct air carbon capture device provided by the embodiments of the present application. Figure 1 The device in the direct air carbon capture device includes:

[0053] The adsorption cavity 10 has an air outlet and a water inlet at the first end, and has an air inlet at the second end.

[0054] The temperature swing adsorption module 20 is arranged inside the adsorption cavity 10.

[0055] The humidity swing adsorption module 30 is arranged inside the adsorption cavity 10 and located between the air outlet and the temperature swing adsorption module 20.

[0056] The adsorbent heating module 40 is arranged inside the adsorption cavity 10.

[0057] The humidity control module 50 is connected to the water inlet.

[0058] When the air inlet and the air outlet are both in an open state, air flows through the temperature swing adsorption module 20 from the air inlet, the temperature swing adsorption module 20 is used for carbon dioxide adsorption action and drying treatment of the air, and the dried air flows through the humidity swing adsorption module 30, the humidity swing adsorption module 30 is used for carbon dioxide adsorption action on the dried air.

[0059] When the air inlet and the air outlet are both in a closed state, the adsorbent heating module 40 is used for heating action on the temperature swing adsorption module 20 and the humidity swing adsorption module 30, the humidity control module 50 is used for humidification action on the inside of the adsorption cavity 10, and the temperature swing adsorption module 20 and the humidity swing adsorption module 30 perform desorption action to desorb carbon dioxide gas.

[0060] The beneficial effects of the embodiments of the present application include but are not limited to: the wetting adsorption module 30 is arranged between the air outlet and the temperature swing adsorption module 20, to ensure that the gas first flows through the temperature swing adsorption module 20 and then flows through the wetting adsorption module 30 inside the adsorption cavity 10; when the air inlet and the air outlet are both in the open state, the temperature swing adsorption module 20 adsorbs carbon dioxide in the air, and at the same time, the air is also subjected to drying treatment, the dried air flows through the wetting adsorption module 30, and the wetting adsorption module 30 performs carbon dioxide adsorption action on the dried air, to improve the adsorption efficiency of the wetting adsorption module 30; when the air inlet and the air outlet are both in the closed state, the humidity control module 50 performs humidification action inside the adsorption cavity 10, and the adsorbent heating module 40 simultaneously heats the temperature swing adsorption module 20 and the wetting adsorption module 30, thereby promoting the desorption efficiency of the temperature swing adsorption module 20 and the wetting adsorption module 30; the present application combines the temperature swing adsorption module 20 and the wetting adsorption module 30, which can improve the efficiency of carbon dioxide adsorption and desorption, thereby improving the carbon dioxide capture efficiency.

[0061] In some embodiments, it should be noted that the first end is the upper end of the adsorption cavity 10, and the second end is the lower end of the adsorption cavity 10. The adsorption cavity 10 is also called an adsorption and desorption tower. Specifically, the shape of the adsorption cavity 10 can be cylindrical, or the shape of the adsorption cavity 10 can be set according to requirements, which is not limited.

[0062] It should be noted that the current direct air carbon capture device usually uses a single adsorption mode for carbon capture, for example, in the temperature swing adsorption mode, the temperature swing adsorbent only drives its adsorption or desorption of carbon dioxide through temperature change; in the wetting adsorption mode, the wetting adsorbent only drives its adsorption or desorption of carbon dioxide through humidity change. The carbon dioxide capture efficiency of the above two adsorption modes is relatively low. The embodiments of the present application combine the above two adsorption modes, the drying action of the temperature swing adsorption module 20 on the air can improve the adsorption efficiency of the wetting adsorption module 30, and the change of temperature can promote the desorption process of the above two adsorption modules (temperature swing adsorption module 20 and wetting adsorption module 30), thereby improving the carbon dioxide capture efficiency.

[0063] In some embodiments, for example, in the low-temperature and low-humidity adsorption process, the temperature swing adsorption module 20 has a certain drying effect, which can dry the air to reduce the humidity of the air, so that the dried air flows through the humidity swing adsorption module 30, and the humidity swing adsorption module 30 has a higher efficiency of carbon dioxide adsorption on the dried air, thereby improving the adsorption efficiency; in the high-temperature and high-humidity desorption process, the adsorbent heating module 40 can heat the temperature swing adsorption module 20 at the same time, and also heat the humidity swing adsorption module 30, thereby promoting the desorption of the humidity swing adsorbent, thereby achieving the effect that the two adsorption modules promote each other and more fully desorb. It can be seen that the two adsorption modes of temperature swing adsorption mode and humidity swing adsorption mode have complementary advantages in mechanism, which can improve the efficiency of carbon dioxide adsorption and desorption, and improve the efficiency of carbon dioxide capture.

[0064] It should be noted that, in theory, the humidity swing adsorbent only needs to change the humidity to realize the adsorption and desorption of carbon dioxide; but in fact, single water vapor humidification cannot ensure that the humidity swing adsorbent completely desorbs and desorbs carbon dioxide gas, thereby reducing the overall carbon dioxide capture efficiency. The embodiment of the present application aims at the above-mentioned problem, by heating the humidity swing adsorbent in the humidity swing adsorption module 30, which can promote the carbon dioxide molecules to separate from the point where the humidity swing adsorbent molecules are combined, thereby more fully desorbing the carbon dioxide.

[0065] In some embodiments, it should be noted that the use of the above two adsorption modules not only improves the carbon dioxide capture efficiency, but also reduces the energy consumption per unit of carbon dioxide capture. Specifically, the total carbon dioxide capture amount of the direct air carbon capture device in the embodiment of the present application will be greater than the sum of the carbon dioxide capture amount of the temperature swing adsorption module 20 alone and the carbon dioxide capture amount of the humidity swing adsorption module 30 alone, that is, the total carbon dioxide capture amount is greatly improved. Since the energy consumption per unit of carbon dioxide capture amount is equal to the total energy consumption of the direct air carbon capture device divided by the total capture amount, the energy consumption per unit of carbon dioxide capture amount can be reduced, thereby reducing the cost of capturing unit carbon dioxide.

[0066] In some embodiments, the temperature swing adsorption module 20 comprises a temperature swing adsorbent and a first adsorbent carrier medium, and the temperature swing adsorbent is arranged in the first adsorbent carrier medium. The humidity swing adsorption module 30 comprises a humidity swing adsorbent and a second adsorbent carrier medium, and the humidity swing adsorbent is arranged in the second adsorbent carrier medium. Specifically, the first adsorbent carrier medium is a water-absorbing MOF (Metal-Organic Framework, MOF) for drying the gas. It should be noted that the water vapor in the air can cause the adsorption efficiency of the temperature swing adsorption module 20 to decrease. If an additional drying module is arranged inside the adsorption cavity 10, the pressure drop of the gas flow can be increased, the adsorption effect of the temperature swing adsorption module 20 can be reduced, and the complexity of the device can also be increased. In order to avoid the influence of the additional drying module on the adsorption effect of the temperature swing adsorption module 20, the water-absorbing MOF is used as the first adsorbent carrier medium of the temperature swing adsorption module 20 in the embodiments of the present application, so that the temperature swing adsorption module 20 is used to directly dry the air, thereby improving the adsorption efficiency of the humidity swing adsorption module 30 while ensuring the adsorption efficiency of the temperature swing adsorption module 20.

[0067] In some embodiments, specifically, a solid amine-based temperature swing adsorbent can be used.

[0068] In another embodiment, the device can further comprise an in-cavity drying module arranged inside the adsorption cavity 10 and located between the temperature swing adsorption module 20 and the humidity swing adsorption module 30, so as to dry the gas that has flowed through the temperature swing adsorption module 20 and avoid affecting the adsorption effect of the temperature swing adsorption module 20. Specifically, the in-cavity drying module can be a water-absorbing MOF.

[0069] In some embodiments, the humidity control module 50 needs to consume electric energy to generate water vapor to humidify the inside of the adsorption cavity 10. For this purpose, the device further comprises a power supply module connected to the humidity control module 50 and used to supply power to the humidity control module 50. Specifically, the power supply module can be a solar panel to facilitate flexible deployment and meet the power demand of the humidity control module 50. In another embodiment, the device can also be connected to the power grid, that is, the humidity control module 50 is connected to the power supply interface of the power grid.

[0070] Please refer to Figure 2 In some embodiments, the humidity swing adsorption module 30, the temperature swing adsorption module 20 and the adsorbent heating module 40 are arranged in the adsorption cavity 10 in sequence from the first end to the second end.

[0071] The embodiment has the advantages that the wet adsorption module 30, the temperature swing adsorption module 20 and the adsorbent heating module 40 are sequentially arranged, the distance between the adsorbent heating module 40 and the temperature swing adsorption module 20 is shorter than the distance between the adsorbent heating module 40 and the wet adsorption module 30, the adsorbent heating module 40 is mainly used for heating the temperature swing adsorption module 20, and the adsorbent heating module 40 can heat the wet adsorption module 30 while heating the temperature swing adsorption module 20, thereby promoting desorption of the wet adsorption module 30 and improving the carbon dioxide desorption efficiency of the wet adsorption module 30. In addition, the wet adsorption module 30, the temperature swing adsorption module 20 and the adsorbent heating module 40 are sequentially arranged along the direction from the first end to the second end, so that the air entering the adsorption cavity 10 from the air inlet first flows through the temperature swing adsorption module 20 and then flows through the wet adsorption module 30, so as to ensure that the temperature swing adsorption module 20 dries the air first and the wet adsorption module 30 performs carbon dioxide adsorption on the dried air, thereby promoting carbon dioxide adsorption of the wet adsorption module 30 and improving the carbon dioxide adsorption efficiency.

[0072] It should be noted that, since the distance between the adsorbent heating module 40 and the temperature swing adsorption module 20 is shorter than the distance between the adsorbent heating module 40 and the wet adsorption module 30, most of the heat generated by the adsorbent heating module 40 is used to heat the temperature swing adsorption module 20, and the waste heat of the adsorbent heating module 40, i.e., other heat, can also be used to promote the desorption process of the wet adsorption module 30, so that the wet adsorbent in the wet adsorption module 30 is fully desorbed, and the overall energy utilization efficiency of the direct air carbon capture device is improved.

[0073] It should be noted that the direction from the first end to the second end refers to a vertical direction from the upper end of the adsorption cavity 10 to the lower end of the adsorption cavity 10. Figure 2 In some embodiments, the arrows are used to represent the flow direction of the gas or liquid. For example, Figure 2 The green arrows in some embodiments can be used to represent the flow direction of the air or carbon dioxide gas, and the blue arrows can be used to represent the flow direction of the water, which can be the flow direction of the water in the water pipeline. In some embodiments, the air inlet and the water outlet are controlled by the same throttle valve. In another embodiment, the device can be provided with one or more throttle valves to control the flow of gas or water. For example, the throttle valve at the air inlet can be controlled to be closed to prevent air from flowing into the adsorption cavity 10. An electric valve can be used as the throttle valve, or other types of valves can be used as the throttle valve, without limitation.

[0074] In some embodiments, specifically, the adsorbent heating module 40 can be an infrared heating module, such as an infrared heater, so as to heat in a vacuum state.

[0075] Please refer to Figure 2In some embodiments, the temperature swing adsorption module 20 and the humidity swing adsorption module 30 are arranged in the adsorption cavity 10 separately.

[0076] The embodiment has the advantages that the temperature swing adsorption module 20 and the humidity swing adsorption module 30 are separated from each other, avoiding that the temperature swing adsorption module 20 directly conducts heat to the humidity swing adsorption module 30 when heated to make the temperature of the humidity swing adsorption module 30 too high; the embodiment can eliminate the interference factors of heat conduction between the two adsorption modules, and only heat the humidity swing adsorption module 30 by the adsorbent heating module 40 to accurately control the temperature of the humidity swing adsorption module 30, so as to promote the desorption efficiency of the humidity swing adsorption module 30.

[0077] It should be noted that the humidity swing adsorption module 30 can perform a desorption action in a high-temperature and high-humidity state.

[0078] Please refer to Figure 2 In some embodiments, the direct air carbon capture device further comprises:

[0079] The outlet gas control module 60 comprises a vacuum pump 61 and a gas collection device 62.

[0080] One end of the vacuum pump 61 is connected to the gas outlet, and the other end of the vacuum pump 61 is connected to the gas collection device 62.

[0081] The vacuum pump 61 is used to perform a vacuumizing action on the inside of the adsorption cavity 10, so that the inside of the adsorption cavity 10 is in a vacuum state, so that the temperature swing adsorption module 20 and the humidity swing adsorption module 30 desorb carbon dioxide gas; the vacuum pump 61 is also used to extract the desorbed carbon dioxide gas from the gas outlet, so that the carbon dioxide gas is collected into the gas collection device 62.

[0082] The embodiment has the advantages that, before the desorption process, the vacuum pump 61 is used to perform a vacuumizing action on the inside of the adsorption cavity 10, so that other gas impurities in the inside of the adsorption cavity 10 are extracted, improving the purity of the carbon dioxide gas desorbed subsequently, and the vacuum state (i.e. a negative pressure environment) is conducive to fully desorbing the carbon dioxide gas from the temperature swing adsorption module 20 and the humidity swing adsorption module 30.

[0083] In some embodiments, specifically, the gas collection device 62 can be a carbon dioxide collection tank. In another embodiment, the gas collection device 62 can also be a carbon dioxide collection bag, or other airtight device that can be used to store gas, and the embodiment of the present application does not limit this.

[0084] Please refer to Figure 2 In some embodiments, the outlet gas control module 60 further comprises a gas drying module 63.

[0085] The gas drying module 63 is connected between the outlet and one end of the vacuum pump 61, and is used for drying the desorbed carbon dioxide gas.

[0086] The embodiment has the advantage that the desorbed carbon dioxide gas is dried by the gas drying module 63, so as to improve the purity of the carbon dioxide gas.

[0087] Please refer to Figure 2 and Figure 3 In some embodiments, the humidity control module 50 includes a water mist generator 51, a water flow meter, a water temperature sensor, and a water pressure sensor; the device further includes a water mist spray head 70.

[0088] The water mist spray head 70 is arranged inside the adsorption cavity 10, and the water mist generator 51 is connected to the water mist spray head 70; the water flow meter, the water temperature sensor, and the water pressure sensor are respectively connected to the water mist generator 51.

[0089] The water mist generator 51 is used for atomizing the water, so that the water mist is sprayed from the water mist spray head 70 to the humidification adsorption module 30.

[0090] The embodiment has the advantage that the water is atomized by the water mist generator 51, so that the water mist is sprayed from the water mist spray head 70 to the humidification adsorption module 30, and the humidification adsorption module 30 is humidified, so as to desorb the carbon dioxide gas from the humidification adsorption module 30.

[0091] It should be noted that the water flow meter is used for detecting the flow of water, the water temperature sensor is used for detecting the temperature of water, and the water pressure sensor is used for detecting the pressure of water. Figure 3 In some embodiments, the green arrow can be used to represent the flow direction of air, the yellow arrow can be used to represent the flow direction of carbon dioxide gas, and the blue arrow can be used to represent the flow direction of water, which can be the flow direction of water in the water pipeline. It can be understood that due to the overlap of the flow directions, some arrows can also be used to represent the flow directions of other types of substances, for example, the green arrow connected to the outlet can also be used to represent the flow direction of carbon dioxide gas, and the embodiments of the present application are not limited in this regard.

[0092] Please refer to Figure 2 and Figure 3 In some embodiments, the direct air carbon capture device further includes:

[0093] An inlet gas control module 80; the inlet gas control module 80 includes a gas pump 81, an air heating module 82, an air flow meter, a gas pressure sensor, a gas temperature sensor, and an air humidity sensor.

[0094] The air pump 81 is connected to the air heating module 82, and the air heating module 82 is connected to the air inlet. The air heating module 82, the air flow meter, the air pressure sensor, the air temperature sensor, and the air humidity sensor are respectively connected to the air heating module 82. The air pump 81 is used to drive air to flow through the air heating module 82 and into the adsorption cavity 10 from the air inlet.

[0095] The advantage of this embodiment is that the air is driven by the air pump 81 to flow into the adsorption cavity 10 from the air inlet, and the air is heated by the air heating module 82 before entering the adsorption cavity 10.

[0096] It should be noted that the air heating module 82 can heat the air to room temperature (such as 25 degrees Celsius) so that the temperature swing adsorption module 20 and the humidity swing adsorption module 30 can adsorb carbon dioxide from air at room temperature, realizing normal temperature adsorption.

[0097] Please refer to Figure 2 and Figure 3 In some embodiments, the direct air carbon capture device further comprises:

[0098] A support seat is connected to the adsorption cavity 10, and the support seat is used to support the direct air carbon capture device.

[0099] A weighing table is used to weigh the total weight of the direct air carbon capture device and the gas inside the adsorption cavity 10.

[0100] A flow uniformizing plate is arranged inside the adsorption cavity 10 and between the air inlet and the temperature swing adsorption module 20. The flow uniformizing plate is used to make the air flow uniformly into the adsorption cavity 10.

[0101] The advantage of this embodiment is that the support seat improves the stability of the air carbon capture device, the weighing table detects the change in the weight of the gas in the device during the carbon dioxide adsorption and desorption process, and the flow uniformizing plate makes the air flow uniformly into the adsorption cavity 10.

[0102] It should be noted that in Figure 3 , the weighing table surface refers to the surface of the weighing table, which can be the upper surface of the weighing table. Specifically, the support seat can be a bracket for supporting the direct air carbon capture device.

[0103] In some embodiments, the direct air carbon capture device further comprises a carbon dioxide concentration sensor, an intra-cavity temperature sensor, an intra-cavity humidity sensor, and an intra-cavity pressure sensor (not shown in the figure).

[0104] The carbon dioxide concentration sensor, the cavity temperature sensor, the cavity humidity sensor, and the cavity pressure sensor are arranged inside the adsorption cavity 10. The carbon dioxide concentration sensor is used to detect the carbon dioxide concentration inside the adsorption cavity 10, the cavity temperature sensor is used to detect the temperature inside the adsorption cavity 10, the cavity humidity sensor is used to detect the humidity inside the adsorption cavity 10, and the cavity pressure sensor is used to detect the pressure inside the adsorption cavity 10.

[0105] The embodiment has the advantage that the carbon dioxide concentration inside the adsorption cavity 10 is detected by the carbon dioxide concentration sensor, the temperature inside the adsorption cavity 10 is detected by the cavity temperature sensor, the humidity inside the adsorption cavity 10 is detected by the cavity humidity sensor, and the pressure inside the adsorption cavity 10 is detected by the cavity pressure sensor, so that the real-time measurement of various parameters (such as temperature and humidity) inside the adsorption cavity 10 is realized, so as to control the adsorbent heating module 40 to heat or open or close the gas inlet and the gas outlet according to the above parameters, and realize the adsorption and desorption process of carbon dioxide.

[0106] Specifically, the cavity pressure sensor is used to detect the air pressure inside the adsorption cavity 10.

[0107] Please refer to Figure 4 In some embodiments, during the adsorption process, the flow direction of air is shown by the green arrow. Among them, the air pump 81 drives the air, the air flows through the air heating module 82, the air temperature sensor, the air pressure sensor, the air flow meter, the throttle valve, the air humidity sensor, and the throttle valve at the gas inlet, and then enters the inside of the adsorption cavity 10 from the gas inlet; The air flows through the adsorbent heating module 40, the temperature swing adsorption module 20, and the humidity swing adsorption module 30, and is discharged from the gas outlet. Specifically, a throttle valve can be arranged at the gas outlet to control the opening and closing of the gas outlet. During the vacuumizing process, the residual gas inside the adsorption cavity 10 is pumped out from the gas outlet by the vacuum pump 61. In another embodiment, a throttle valve can also be arranged at the vacuum pump 61. The gas during the vacuumizing process can flow through the gas drying module 63, which is not limited.

[0108] Please refer to Figure 5In some embodiments, during the desorption process, the flow direction of the carbon dioxide gas is shown by the yellow arrow, and the flow direction of the water is shown by the blue arrow. The water flows through the water flow meter, the water mist generator 51, the water temperature sensor, and the water pressure sensor. The water mist (water vapor) generated by the water mist generator 51 is sprayed from the water mist spray head 70 onto the humidification adsorption module 30. Excess water flows out from the water outlet pipe at the lower end of the adsorption cavity 10. At the same time, the adsorbent heating module 40 performs a heating action. In a high-temperature and high-humidity environment, both the temperature swing adsorption module 20 and the humidification adsorption module 30 desorb carbon dioxide gas. Then, the vacuum pump 61 pumps out the carbon dioxide gas. The carbon dioxide gas flows from the gas outlet through the gas drying module 63 and the vacuum pump 61, and is collected in the gas collection device 62.

[0109] In some embodiments, the direct air carbon capture device can be applied in an outdoor environment. For example, the device is suitable for an outdoor atmospheric scenario with a carbon dioxide concentration as low as 400 ppm. In an outdoor deployment, the annual carbon dioxide capture amount of the device can reach one hundred tons. In another embodiment, the device can also be applied in an environment with a relatively concentrated population, such as an indoor scenario with a relatively concentrated population or an outdoor scenario with a dense flow of people. In an environment with a relatively concentrated population, the carbon dioxide concentration in the air will increase significantly, for example, the carbon dioxide concentration can reach 1000 ppm or 2000 ppm or more, which will increase the adsorption efficiency of the device. The device can also reduce the carbon dioxide concentration, and can also adjust the air humidity and improve the indoor air quality, so that the user experience in the densely populated place is more comfortable.

[0110] In an application example, the carbon dioxide capture process corresponding to the direct air carbon capture device is as follows:

[0111] (1) Normal temperature and low humidity adsorption process, specifically including:

[0112] The air inlet and the air outlet of the adsorption cavity are controlled to be opened, in which case the environment inside the adsorption cavity and the atmosphere are in communication with each other. The air pump pumps the air in the environment into the adsorption cavity through the gas pipeline. The air flows into the adsorption cavity through the air inlet at the lower end of the adsorption cavity after passing through the air heating module and the air flow meter. In this process, the air temperature sensor, the air pressure sensor, and the air humidity sensor measure the real-time state of the gas. At this time, the adsorption cavity is in a normal temperature and low humidity working condition. After passing through the flow distribution plate, the air flows through the temperature-variable adsorbent and the humidity-variable adsorbent arranged in layers from bottom to top. The temperature-variable adsorption module adsorbs carbon dioxide in the air at normal temperature (about 25°C), and at the same time, due to the porous physical properties of the temperature-variable adsorption module, the temperature-variable adsorption module also adsorbs part of the water vapor in the air. Specifically, the temperature-variable adsorbent in the temperature-variable adsorption module is a solid amine adsorbent, and the small amount of water vapor molecules adsorbed by the temperature-variable adsorption module not only promotes the combination of carbon dioxide molecules and solid amine molecules, but also dries the air to reduce the humidity of the air. The dried air is in full contact with the humidity-variable adsorption module, and the second adsorption of carbon dioxide occurs, thereby promoting the adsorption of carbon dioxide by the humidity-variable adsorption module. It can be seen that the device not only enables the air flow to fully contact the two adsorption modules described above, but also improves the adsorption efficiency of the humidity-variable adsorption module by virtue of the moisture absorption characteristics of the temperature-variable adsorption module.

[0113] (2) The vacuum extraction process specifically includes:

[0114] After the temperature-variable adsorption module and the humidity-variable adsorption module are close to the saturation state, the air inlet and the air outlet are controlled to be closed to ensure the airtightness of the adsorption cavity. The vacuum pump is controlled to quickly extract the remaining air inside the adsorption cavity and discharge it to the atmosphere. During the vacuum extraction process, the vacuum degree inside the adsorption cavity can reach 0.9 atm. The pressure sensor can be used to detect the air pressure inside the adsorption cavity in real time. When the air pressure inside the adsorption cavity is less than the preset air pressure threshold, the vacuum pump is turned off, the air inlet and the air outlet are kept closed, and the vacuum pump is connected to the carbon dioxide collection tank to prepare for the subsequent high-temperature and high-humidity desorption process. The purpose of the vacuum extraction process is to extract impurity gases inside the adsorption cavity to improve the purity of the collected carbon dioxide, and the negative pressure state inside the adsorption cavity is conducive to the complete desorption of carbon dioxide.

[0115] (3) The high-temperature and high-humidity desorption process specifically includes:

[0116] The gas inlet and the gas outlet are still in the closed state. The water mist generator and the water mist sprayer are opened, the water mist enters the inside of the adsorption cavity, and the humidity inside the adsorption cavity is rapidly increased; at the same time, the adsorbent heating module is opened, and the temperature inside the adsorption cavity is rapidly increased in a vacuum environment through heat radiation. The change of the temperature and humidity inside the adsorption cavity can be detected in real time through the cavity temperature sensor and the cavity humidity sensor. In the above process, the humidity inside the adsorption cavity is increased to the working humidity of the desorption state of the variable humidity adsorption module, such as a relative humidity of 90% or above; the temperature inside the adsorption cavity is increased to the working temperature of the desorption state of the variable temperature adsorption module, such as between 90 and 100 degrees Celsius. Under the high-temperature and high-humidity working condition, the variable temperature adsorption module and the variable humidity adsorption module desorb carbon dioxide. The rise of the air pressure inside the adsorption cavity can be detected through the cavity pressure sensor. When the air pressure inside the adsorption cavity rises to a certain air pressure threshold, the gas inlet and the gas outlet are opened, and the vacuum pump is controlled to extract the desorbed carbon dioxide gas, the carbon dioxide gas flows through the gas drying module and the vacuum pump along the gas channel (such as a gas pipeline), and enters the gas collection device 62 to realize the collection of carbon dioxide. The vacuum pump continues to work until the air pressure inside the adsorption cavity falls again to a state close to vacuum. This indicates that the carbon dioxide molecules in the variable temperature adsorption module and the variable humidity adsorption module have been fully released. The adsorbent heating module, the water mist generator, the water mist sprayer and the vacuum pump are turned off, the gas collection device 62 is disconnected from the vacuum pump, and the carbon dioxide collection process is completed. Finally, the gas inlet and the gas outlet at both ends of the adsorption cavity are opened, so that the environment inside the adsorption cavity and the atmosphere are connected with each other, the adsorption cavity is naturally cooled and dried to reach a normal temperature and low humidity working condition, and is ready for the next cycle of carbon dioxide capture process.

[0117] Please refer to Figure 6 The embodiment of the present application also provides a direct air carbon capture control system, which comprises the direct air carbon capture device and the controller.

[0118] The specific implementation of the direct air carbon capture control system is basically the same as that of the above-mentioned specific embodiment of the direct air carbon capture control method, and will not be repeated here.

[0119] The embodiment of the present application also provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the above-mentioned direct air carbon capture control method.

[0120] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. In addition, the memory can include a high-speed random access memory and can also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state memory device. In some embodiments, the memory can optionally include a memory disposed remotely from the processor, which can be connected to the processor through a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0121] The embodiments described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, with the evolution of technology and the appearance of new application scenarios, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0122] Those skilled in the art can understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and can include more or fewer steps than shown in the figures, or combine certain steps, or different steps.

[0123] The device embodiments described above are only schematic, and the units described as separate components can or can not be physically separate, i.e., can be located in one place, or can be distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0124] Those skilled in the art can understand that all or some of the steps in the above disclosed method, the functional modules / units in the system and the device can be implemented as software, firmware, hardware and their appropriate combinations.

[0125] The terms "first", "second", "third", "fourth" and the like used in the specification of the present application and the above-described drawings, if any, are used to distinguish similar objects, and do not necessarily have to be used to describe a particular order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0126] It should be understood that, in the application, "at least one" refers to one or more, and "multiple" refers to two or more. "And / or" is used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, "A and / or B" can represent three cases of only A, only B and A and B existing at the same time, wherein A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after it. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b or c can represent a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b and c can be single or multiple.

[0127] In several embodiments provided in the application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative, for example, the division of the above units is only a logical function division, and actual implementation can have another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. The coupling or direct coupling or communication connection between the displayed or discussed each other can be through some interface, indirect coupling or communication connection between devices or units, which can be electrical, mechanical or other forms.

[0128] The units described above as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on multiple network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0129] In addition, each functional unit in each embodiment of the application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0130] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes multiple instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store programs.

[0131] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and essence of the present invention should be within the scope of the present invention.

Claims

1. A direct air carbon capture device, characterized in that: The device comprises: An adsorption chamber, wherein a first end of the adsorption chamber has an air outlet and a water inlet, and a second end of the adsorption chamber has an air inlet; A temperature swing adsorption module, wherein the temperature swing adsorption module is disposed inside the adsorption chamber; a humidity swing adsorption module, the humidity swing adsorption module being disposed inside the adsorption chamber and between the gas outlet and the temperature swing adsorption module; an adsorbent heating module, the adsorbent heating module being disposed inside the adsorption chamber; a humidity control module connected to the water inlet; Wherein, when the air inlet and the air outlet are both in an open state, air flows from the air inlet through the temperature swing adsorption module, and the temperature swing adsorption module is used to adsorb carbon dioxide and dry the air. The dried air flows through the humidity swing adsorption module, and the humidity swing adsorption module is used to adsorb carbon dioxide on the dried air. When the air inlet and the air outlet are both in a closed state, the adsorbent heating module is used to heat the temperature swing adsorption module and the humidity variable adsorption module, the humidity control module is used to humidify the inside of the adsorption chamber, and the temperature swing adsorption module and the humidity variable adsorption module perform a desorption action to desorb carbon dioxide gas.

2. The device according to claim 1, characterized in that The humidity swing adsorption module, the temperature swing adsorption module and the adsorbent heating module are sequentially arranged inside the adsorption chamber along a direction from the first end to the second end.

3. The device according to claim 1, characterized in that The temperature swing adsorption module and the humidity swing adsorption module are separately arranged inside the adsorption chamber.

4. The device according to claim 1, characterized in that The device further comprises: an outlet gas control module, the outlet gas control module comprising a vacuum pump and a gas collection device; One end of the vacuum pump is connected to the gas outlet, and the other end of the vacuum pump is connected to the gas collecting device; The vacuum pump is used to evacuate the interior of the adsorption chamber so that the interior of the adsorption chamber is in a vacuum state, so that the temperature swing adsorption module and the humidity swing adsorption module desorb carbon dioxide gas; the vacuum pump is also used to extract the desorbed carbon dioxide gas from the gas outlet so that the carbon dioxide gas is collected in the gas collection device.

5. The device according to claim 4, characterized in that The outlet gas control module also includes a gas drying module; The gas drying module is connected between the gas outlet and one end of the vacuum pump; the gas drying module is used to dry the desorbed carbon dioxide gas.

6. The device according to claim 1, characterized in that The humidity control module includes a water mist generator, a water flow meter, a water temperature sensor and a water pressure sensor; the device also includes a water mist spray head; The water mist spray head is arranged inside the adsorption chamber, and the water mist generator is connected to the water mist spray head; the water flow meter, the water temperature sensor and the water pressure sensor are respectively connected to the water mist generator; The water mist generator is used to atomize water so that the water mist is sprayed from the water mist spray head onto the wet adsorption module.

7. The device according to any one of claims 1 to 6, characterized in that The device further comprises: Inlet gas control module; the inlet gas control module includes an air pump, an air heating module, an air flow meter, an air pressure sensor, an air temperature sensor and an air humidity sensor; In which, the air pump is connected to the air heating module, and the air heating module is connected to the air inlet; the air heating module, the air flow meter, the air pressure sensor, the air temperature sensor and the air humidity sensor are respectively connected to the air heating module; the air pump is used to drive the air so that the air flows through the air heating module and flows into the adsorption chamber from the air inlet.

8. The device according to any one of claims 1 to 6, characterized in that The device further comprises: a support base, the support base being connected to the adsorption chamber and used to support the direct air carbon capture device; a weighing platform, on which the support base is placed, and for weighing the total weight of the direct air carbon capture device and the gas inside the adsorption chamber; A flow equalizing plate is arranged inside the adsorption chamber, and the flow equalizing plate is arranged between the air inlet and the temperature variable adsorption module; the flow equalizing plate is used to make the air flow evenly into the adsorption chamber.

9. The device according to any one of claims 1 to 6, characterized in that The device further comprises: a carbon dioxide concentration sensor, an intracavity temperature sensor, an intracavity humidity sensor, and an intracavity pressure sensor; The carbon dioxide concentration sensor, the intra-cavity temperature sensor, the intra-cavity humidity sensor, and the intra-cavity pressure sensor are all arranged inside the adsorption chamber; the carbon dioxide concentration sensor is used to detect the carbon dioxide concentration inside the adsorption chamber, the intra-cavity temperature sensor is used to detect the temperature inside the adsorption chamber, the intra-cavity humidity sensor is used to detect the humidity inside the adsorption chamber, and the intra-cavity pressure sensor is used to detect the pressure inside the adsorption chamber.

10. A direct air carbon capture control system, characterized in that: The system comprises: the direct air carbon capture device according to any one of claims 1 to 9, and a controller; The controller is communicatively connected to the direct air carbon capture device; the controller is used to control the opening or closing of the air inlet and the air outlet, and to control the adsorbent heating module to heat the temperature swing adsorption module and the humidity swing adsorption module.

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