Carbon dioxide trapping device capable of cyclically operating

Abstract

The utility model provides a cyclically-operated carbon dioxide trapping device. A shell of the cyclically-operated carbon dioxide trapping device is connected with an air inlet pipeline, an air outlet pipeline and an exhaust pipeline; the shell is internally provided with a reaction box body, the reaction box body is provided with two reaction cabins, and each reaction cabin is internally provided with a fan, a heater and a carbon dioxide adsorption structure; the air inlet pipeline is connected to the air inlets of the two reaction cabins and is close to the draught fan, the draught fan is used for sucking indoor air into the corresponding reaction box bodies and enabling the indoor air to flow through the heater and the carbon dioxide adsorption structure, and the carbon dioxide adsorption structure is used for adsorbing carbon dioxide in the flowing air; the heater is used for heating flowing air and desorbing carbon dioxide adsorbed in the carbon dioxide adsorption structure; and the two reaction cabins alternately perform adsorption and desorption of carbon dioxide. The device is convenient to operate and can continuously and efficiently control the concentration of indoor carbon dioxide.

Description

Technical Field

[0001] The present application relates to the field of indoor air purification, and in particular to a circulating carbon dioxide capture device. Background Art

[0002] People spend over 80% of their lives indoors, and the absolute concentration of CO2 is considered a key parameter for assessing indoor air quality. In crowded environments, especially confined spaces, CO2 concentrations can easily exceed 1000 ppm. Prolonged exposure to such air quality can cause occupants to experience symptoms such as headaches, dizziness, fatigue, drowsiness, difficulty concentrating, a rapid heartbeat, and mild nausea. Therefore, controlling indoor CO2 concentrations is crucial.

[0003] In recent years, research on direct air carbon capture has developed rapidly, but its application is mainly concentrated in the industrial field, and there is less research on improving the indoor environment of buildings. Adsorption modules made of carbon dioxide adsorption materials can control the indoor carbon dioxide concentration in a direction and sensitive manner. Compared with air exchange methods based on external circulation (such as window ventilation and fresh air systems), the carbon dioxide adsorption method based on internal circulation can reduce HVAC energy consumption by about 55% in winter and summer due to the significant reduction in ventilation rate. This method is also applicable to home scenarios under a wider range of building structures.

[0004] However, due to the limited adsorption capacity of the adsorption material, the adsorption module needs to be desorbed and regenerated after saturation, which makes it impossible to achieve continuous and long-term carbon dioxide capture, affecting the purification effect. Currently, most modules on the market are replaceable, but this requires frequent replacement of materials, causing many inconveniences.

[0005] Therefore, it is urgent to solve the problem of continuous adsorption of the adsorption module in the form of equipment to improve the efficiency and convenience of carbon dioxide capture. Utility Model Content

[0006] One of the purposes of the present application is to provide a circulating carbon dioxide capture device, aiming to solve the problem of poor performance of existing indoor direct air carbon capture devices.

[0007] The technical solution of this application is:

[0008] A circulating carbon dioxide capture device comprises a shell, the shell being respectively connected to an air inlet duct, an air outlet duct and an exhaust duct; a reaction box is arranged in the shell, the reaction box having two reaction chambers, each of which is equipped with a fan, a heater and a carbon dioxide adsorption structure; the air inlet duct is respectively connected to the air inlets of the two reaction chambers and is close to the fan, the fan is used to draw indoor air into the corresponding reaction chamber, and pass the heater and the carbon dioxide adsorption structure, the carbon dioxide adsorption structure is used to adsorb carbon dioxide in the passing air, and the heater is used to heat the passing air and desorb the carbon dioxide adsorbed in the carbon dioxide adsorption structure; the two reaction chambers alternately adsorb and desorb carbon dioxide, so that the circulating carbon dioxide capture device operates in a circulating manner.

[0009] As a technical solution of the present application, the air outlet duct is connected to the air outlets of the two carbon dioxide adsorption structures, and is used to transport the air treated with carbon dioxide adsorption into the room; the exhaust duct is respectively connected to the air outlets of the two carbon dioxide adsorption structures, and is used to discharge the air treated with carbon dioxide desorption outdoors.

[0010] As a technical solution of the present application, the inner cavity of the carbon dioxide adsorption structure is filled with multiple layers of carbon dioxide adsorption material.

[0011] As a technical solution of the present application, a controller is further included, which is electrically connected to the fan and the heater, respectively, and is used to control the opening or closing of the fan and the heater, respectively.

[0012] As a technical solution of the present application, a first concentration sensor is provided at the air inlet of the carbon dioxide adsorption structure, which is used to measure the carbon dioxide concentration at the air inlet of the carbon dioxide adsorption structure; a second concentration sensor is provided at the air outlet of the carbon dioxide adsorption structure, which is used to measure the carbon dioxide concentration at the air outlet of the carbon dioxide adsorption structure; the first concentration sensor and the second concentration sensor are respectively electrically connected to the controller, and are used to send the measured carbon dioxide concentration data to the controller.

[0013] As a technical solution of the present application, a temperature sensor is provided in the middle of the carbon dioxide adsorption structure for measuring the desorption temperature inside the carbon dioxide adsorption structure; the temperature sensor is electrically connected to the controller for sending the measured desorption temperature data to the controller.

[0014] As a technical solution of the present application, the air inlet duct includes two air inlet pipes; each of the air inlet pipes is respectively connected to the air inlet of each corresponding reaction chamber and is close to the corresponding fan.

[0015] As a technical solution of the present application, the air outlet duct includes two air outlet pipes, and the exhaust duct includes two exhaust pipes, a connecting pipe and two delivery pipes; a first reversing valve is provided on the air outlet of each of the carbon dioxide adsorption structures; one end of each of the air outlet pipes and one end of each of the exhaust pipes are respectively connected to the two ends of the corresponding first reversing valve, and the other ends of the two exhaust pipes are commonly connected to one end of the connecting pipe; the other end of the connecting pipe is respectively connected to the two delivery pipes through a second reversing valve; the air outlet pipe is used to deliver air treated with carbon dioxide adsorption into the room; and the delivery pipe is used to discharge air treated with carbon dioxide desorption out of the room.

[0016] As a technical solution of the present application, a one-way valve is installed on each exhaust pipe.

[0017] As a technical solution of the present application, it also includes a heat exchanger, which is located below the reaction box body, and the air inlet end of the air inlet duct passes through the heat exchanger, and the exhaust end of the exhaust duct passes through the heat exchanger; the heat exchanger is used to recover the heat of the exhaust air in the exhaust duct when the reaction chamber is performing carbon dioxide desorption treatment, and use the heat to preheat the air in the air inlet duct.

[0018] Beneficial effects of this application:

[0019] In the cyclically operated carbon dioxide capture device of the present application, the device uses a fan and an air inlet pipe to draw indoor air from a reaction chamber. When the air flows through the carbon dioxide adsorption structure, the carbon dioxide in the air is absorbed and removed, and the purified air is returned to the room through the air outlet pipe. When the carbon dioxide adsorption structure is saturated, the heater is activated to heat the air flowing through it to generate hot air. The hot air is blown through the saturated carbon dioxide adsorption structure, thereby desorbing and regenerating the carbon dioxide adsorbed by the carbon dioxide adsorption structure and discharging it to the outside through the exhaust pipe. In addition, the device adopts a dual-chamber mode, and each reaction chamber performing an adsorption operation has two switchable modes, namely adsorption mode and desorption mode, so that the indoor carbon dioxide concentration is stabilized at a set value or maintained within a set range. When the carbon dioxide adsorption structure of one chamber has adsorbed a specified amount of carbon dioxide (i.e., adsorption saturation), the carbon dioxide adsorption structure of the other chamber is switched to continue adsorption and purification, and the saturated carbon dioxide adsorption structure can then start desorption and regeneration. This cycle achieves long-term and uninterrupted adsorption of carbon dioxide from the air, thereby achieving continuous capture of carbon dioxide. At the same time, through the controller and the temperature sensor, first concentration sensor, and second concentration sensor controlled by it, the operating status inside the reaction chamber can be monitored in real time, and the controller can execute the set mode, adjust the working conditions of the heater and the fan, and switch the first reversing valve and the second reversing valve to convert the gas outlet pipeline, so that the two reaction chambers in the reaction box can circulate in turn, alternately performing carbon dioxide adsorption and desorption regeneration operations, and also realize the control of the desorption temperature in the reaction chamber, making the device safer and more reliable to use, and can also realize autonomous, continuous, and long-term capture of carbon dioxide, avoiding the equipment shutdown caused by material desorption when using a fixed adsorption module or the inconvenience caused by frequent material replacement when using a replaceable module. It can be seen that the device has a simple structure, is easy to operate, safe and stable, and provides a way to continuously and efficiently control the indoor carbon dioxide concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the following is a brief introduction to the drawings required for use in the implementation methods. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 Schematic diagram of a circulating carbon dioxide capture device provided in an embodiment of the present application.

[0022] Icons: 1-shell; 2-air inlet pipe; 3-air outlet pipe; 4-exhaust pipe; 5-reaction chamber; 6-fan; 7-heater; 8-carbon dioxide adsorption structure; 9-first concentration sensor; 10-second concentration sensor; 11-temperature sensor; 12-connecting pipe; 13-delivery pipe; 14-first reversing valve; 15-second reversing valve; 16-check valve; 17-heat exchanger. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0026] In the description of this application, it should be noted that the terms "upper" and "lower" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. These are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0027] In addition, in this application, unless otherwise expressly specified or limited, the phrase "a first feature is above or below a second feature" may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, the phrases "above, above, and above the second feature" may include the first feature being directly above and obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The phrases "below, below, and below the second feature" may include the first feature being directly below and obliquely below the second feature, or simply indicate that the first feature is lower in level than the second feature.

[0028] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0029] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0030] Example:

[0031] Please refer to Figure 1The present application provides a carbon dioxide capture device with a circulating operation, which includes a shell 1, with two air inlets at the bottom of the shell 1, each of which is connected to an air inlet duct, and the air inlet duct is connected to the indoor air; two air outlets are provided at the top of the shell 1, each of which is connected to an air outlet duct, and the air outlet duct is connected to the indoor air, so that when the adsorption mode is running, the indoor air circulates in the device and the room; an exhaust port is also provided in the middle of the top of the shell 1, and the exhaust port is connected to an exhaust duct, and the exhaust duct is connected to the outdoor environment, which discharges the polluted air with high temperature and high carbon dioxide concentration generated when the adsorption mode is running to the outside; a reaction device is provided inside the shell 1 The reaction box and the controller are provided. The reaction box has two reaction chambers 5. The configurations of the two reaction chambers 5 are the same. A fan 6, a heater 7 and a carbon dioxide adsorption structure 8 are installed in each reaction chamber 5 from bottom to top. The air inlet duct includes two air inlet pipes 2. Each air inlet pipe 2 is connected to the air inlet of each corresponding reaction chamber 5 and is close to the corresponding fan 6. The fan 6 is used to suck the indoor air into the reaction box and flow through the carbon dioxide adsorption structure 8. The carbon dioxide adsorption structure 8 is used to adsorb the high concentration of carbon dioxide in the indoor air flowing through. The heater 7 is used to heat the flowing air so that the hot air can purge the saturated carbon dioxide adsorption structure 8, thereby The carbon dioxide in the carbon dioxide adsorption structure 8 is desorbed; and a first concentration sensor 9 is provided at the air inlet of the carbon dioxide adsorption structure 8, which is used to measure the carbon dioxide concentration at the air inlet of the carbon dioxide adsorption structure 8; a second concentration sensor 10 is provided at the air outlet of the carbon dioxide adsorption structure 8, which is used to measure the carbon dioxide concentration at the air outlet of the carbon dioxide adsorption structure 8; and the first concentration sensor 9 and the second concentration sensor 10 are respectively electrically connected to the controller, and are used to send the measured carbon dioxide concentration data to the controller; a temperature sensor 11 is provided in the middle of the carbon dioxide adsorption structure 8, which is used to measure the carbon dioxide concentration of the carbon dioxide adsorption structure 8. The desorption temperature inside the room is measured by a temperature sensor 11 which is electrically connected to the controller and is used to send the measured desorption temperature data to the controller. The measurement accuracy of the temperature sensor 11 is ±0.5°C, and the working status of the fan 6 and the heater 7 are adjusted by the controller to ensure that the desorption operation can be carried out safely and efficiently. The air outlet duct is connected to the air outlet of the carbon dioxide adsorption structure 8 and is used to transport the air treated by carbon dioxide adsorption into the room. The exhaust duct is connected to the air outlet of the carbon dioxide adsorption structure 8 and is used to discharge the air treated by carbon dioxide desorption outside the room. The controller is electrically connected to the fan 6 and the heater 7 respectively and is used to control the opening or closing of the fan 6 and the heater 7 respectively.

[0032] The first concentration sensor 9 and the second concentration sensor 10 have a measurement accuracy of ±(30ppm reading + 3%), and are used to monitor the carbon dioxide concentration of the gas before and after treatment, and determine the saturation level of the carbon dioxide adsorption material through the controller, thereby controlling the equipment components to execute the corresponding operating mode.

[0033] Therefore, the bottom of the reaction chamber serves as an air inlet duct, and the air outlet duct at the top of the reaction chamber communicates with the air outlet of the carbon dioxide adsorption structure 8 through a first reversing valve 14. The air inlet duct and the air outlet duct exchange heat at a heat exchanger 17. Furthermore, the two reaction chambers 5 operate in coordination with each other by receiving commands from a controller.

[0034] The device uses a fan 6 to draw indoor air from the air inlet, and the carbon dioxide in the air is absorbed and removed when it flows through the carbon dioxide adsorption structure 8; when the carbon dioxide adsorption structure 8 is saturated, the heater 7 is started again to use hot air to desorb and regenerate the carbon dioxide in the carbon dioxide adsorption structure 8.

[0035] It should be noted that in this embodiment, the controller, first concentration sensor 9, second concentration sensor 10, and temperature sensor 11 all employ conventional structures, and their specific structures and operating principles are not further described here. The first reversing valve 14, second reversing valve 15, and one-way valve 16 are all electrically operated valves with good airtightness. The reaction chamber 5 is equipped with an operation panel, through which the user can select the mode in which the reaction chamber 5 operates for adsorption, namely, precision mode or standard mode.

[0036] In addition, it should be noted that in other embodiments, the position of the fan 6 can be adaptively adjusted according to different needs. It can be interchanged with the heater 7 or placed on the top of the reaction box. Its position is not limited to the design method in this embodiment.

[0037] At the same time, the inner cavity of the carbon dioxide adsorption structure 8 is filled with multiple layers of carbon dioxide adsorption material. The carbon dioxide adsorption material layer can be made of materials known in the art, such as activated carbon, or lithium zirconate and lithium silicate adsorbents. The carbon dioxide adsorption material has a high adsorption rate and a large capacity, and can be desorbed by blowing with hot air. The desorption temperature is not high, the desorption energy consumption is low, and the time required for desorption is shorter than the time it takes to adsorb to saturation. The heater 7 uses a heater known in the art, and its specific structure and working principle will not be repeated here. The heater 7 is used to heat the air flowing through it, and the hot air is blown through the saturated carbon dioxide adsorption structure 8 to desorb the carbon dioxide adsorbed in the carbon dioxide adsorption structure 8.

[0038] Furthermore, in this embodiment, the air outlet duct includes two air outlet pipes 3, and the exhaust duct includes two exhaust pipes 4, a connecting pipe 12 and two delivery pipes 13; wherein, a first reversing valve 14 is provided on the air outlet of each carbon dioxide adsorption structure 8; at the same time, one end of each air outlet pipe 3 and one end of each exhaust pipe 4 are respectively connected to the two ends of the corresponding first reversing valve 14, and the other ends of the two exhaust pipes 4 are commonly connected to one end of the connecting pipe 12; the other end of the connecting pipe 12 is respectively connected to the two delivery pipes 13 through the second reversing valve 15; the air outlet pipe 3 is used to deliver air treated with carbon dioxide adsorption into the room; the delivery pipe 13 is used to discharge air treated with carbon dioxide desorption out of the room; the controller is electrically connected to the first reversing valve 14 and the second reversing valve 15, respectively, for controlling the opening or closing of the first reversing valve 14 and the second reversing valve 15, respectively. In addition, a one-way valve 16 for controlling the gas flow direction is installed on each exhaust pipe 4. The one-way valve 16 can prevent gas cross-flow; the controller is electrically connected to the one-way valve 16 to control the opening or closing of the one-way valve 16.

[0039] It should be noted that, in this embodiment, the fan 6 can adopt the variable frequency fan 6 in the prior art, which can execute the signal instructions of the controller to adjust the circulating air volume.

[0040] In addition, a heat exchanger 17 is provided below the reaction box body, the air inlet end of the air inlet pipe 2 passes through the heat exchanger 17, and the exhaust end of the delivery pipe 13 passes through the heat exchanger 17; the heat exchanger 17 can recover the heat of the exhaust air in the exhaust duct when the reaction chamber 5 performs carbon dioxide desorption treatment, and use the heat to preheat the air in the air inlet duct, which can reduce the desorption energy consumption.

[0041] It should be noted that, in this embodiment, the heat exchanger 17 adopts the structure of the prior art, and its specific structure and working principle are not described in detail here.

[0042] This device adopts a dual-chamber mode, which is controlled by the controller to cycle through carbon dioxide adsorption and desorption. Since the device is started, there are three operating conditions:

[0043] (1) The first reaction chamber 5 is in adsorption operation, and the second reaction chamber 5 is in standby mode;

[0044] (2) The first reaction chamber 5 operates in a desorption mode, and the second reaction chamber 5 operates in an adsorption mode;

[0045] (3) The first reaction chamber 5 operates in adsorption mode, and the second reaction chamber 5 operates in desorption mode, and the cycle continues until the device is shut down.

[0046] When the device is started, the first reaction chamber 5 is in adsorption operation, and the second reaction chamber 5 is in standby mode:

[0047] In the first reaction chamber 5, the fan 6 is running and the heater 7 is turned off. Air with a high indoor carbon dioxide concentration enters the first reaction chamber 5 through the air inlet pipe 2 and is adsorbed and purified by the carbon dioxide adsorption material. The first reversing valve 14 controls the discharge of air with a low carbon dioxide concentration through the air outlet pipe 3 into the indoor environment. The first concentration sensor 9 and the second concentration sensor 10 monitor the difference in carbon dioxide concentration before and after adsorption until it is determined that the adsorption material in the first reaction chamber 5 is saturated, and then the process moves to the next operating state.

[0048] When entering the second working state, the first reaction chamber 5 is in desorption operation, and the second reaction chamber 5 is in adsorption operation:

[0049] In the first reaction chamber 5: the fan 6 is running, the heater 7 is running, and the indoor air enters the first reaction chamber 5 through the air inlet pipe 2, and is heated to the desorption temperature by the heater 7 before entering the saturated carbon dioxide adsorption material, thereby promoting the desorption of carbon dioxide adsorbed by the carbon dioxide adsorption material; the first reversing valve 14 and the second reversing valve 15 control the hot air to be discharged from the exhaust pipe 4 to the outdoor environment, wherein the one-way valve 16 controls the gas flow direction to prevent gas cross-flow; the exhausted hot air is preheated at the heat exchanger 17 by the air entering from the air inlet pipe 2, thereby reducing the energy consumption of desorption; the first concentration sensor 9 and the second concentration sensor 10 monitor the difference in gas carbon dioxide concentration before and after adsorption, until it is determined that the adsorption material in the first reaction chamber 5 has completed desorption and enters the standby state;

[0050] At the same time, in the second reaction chamber 5: the fan 6 is running and the heater 7 is turned off; the indoor high-concentration carbon dioxide air enters the second reaction chamber 5 through the air inlet pipe 2 and is adsorbed and purified by the carbon dioxide adsorption material; the first reversing valve 14 controls the air to be discharged from the air outlet pipe 3 and enter the indoor environment; the first concentration sensor 9 and the second concentration sensor 10 monitor the difference in gas carbon dioxide concentration before and after adsorption until it is determined that the adsorption material in the second reaction chamber 5 is saturated and the next operating mode is entered.

[0051] When entering the third operating state, the first reaction chamber 5 operates in adsorption mode, and the second reaction chamber 5 operates in desorption mode:

[0052] In the first reaction chamber 5, the fan 6 is running and the heater 7 is turned off. Indoor air with a high concentration of carbon dioxide enters the first reaction chamber 5 through the air inlet pipe 2 and is adsorbed and purified by the carbon dioxide adsorbent material. The first reversing valve 14 controls the air to be discharged through the air outlet pipe 3 and enter the indoor environment. The first concentration sensor 9 and the second concentration sensor 10 monitor the difference in carbon dioxide concentration before and after adsorption until it is determined that the adsorbent material in the first reaction chamber 5 is saturated, and then the process is switched to the next operating mode.

[0053] In the second reaction chamber 5, the fan 6 and the heater 7 are running; the indoor air enters the second reaction chamber 5 through the air inlet pipe 2, and is heated to the desorption temperature by the heater 7 and then enters the saturated carbon dioxide adsorption material, thereby promoting the desorption of the carbon dioxide adsorbed therein; the first reversing valve 14 and the second reversing valve 15 control the hot air to be discharged from the exhaust pipe 4 to the outdoor environment, wherein the one-way valve 16 controls the gas flow direction to prevent gas cross-flow; the discharged hot air is preheated at the heat exchanger 17 to the air entering from the air inlet pipe 2, thereby reducing the energy consumption for desorption; the first concentration sensor 9 and the second concentration sensor 10 monitor the difference in gas carbon dioxide concentration before and after adsorption, until it is determined that the adsorption material in the second reaction chamber 5 has completed desorption and enters the standby state.

[0054] The adsorption reaction chamber 5 of this device has two operating modes: precision mode and standard mode, which can be selected by the user through the operation panel on the reaction chamber 5. In precision mode, the user sets the target indoor carbon dioxide concentration. The reaction chamber 5 operates at full power until the target concentration is reached, then switches to partial power to maintain a stable concentration. In standard mode, the user sets the target concentration and control accuracy, i.e., the target concentration range. The reaction chamber 5 operates at full power until the target concentration is reached, then enters standby mode. If the concentration exceeds the set range, it restarts to ensure that the indoor carbon dioxide concentration remains within the set range.

[0055] It should be noted that the two operating modes on the control panel adopt the structure in the prior art, and the specific structure and working principle are not described here in detail.

[0056] In summary, the cyclically operated carbon dioxide capture device of the present application utilizes a fan 6 and an air inlet pipe 2 to draw indoor air from a reaction chamber 5. When the air flows through the carbon dioxide adsorption structure 8, the carbon dioxide therein is absorbed and removed, and the purified air is re-delivered to the room through the air outlet pipe 3. When the carbon dioxide adsorption structure 8 is saturated, the heater 7 is activated, and the hot air generated by the heater 7 is used to desorb and regenerate the carbon dioxide adsorbed by the carbon dioxide adsorption structure 8, and the carbon dioxide is discharged to the outside through the exhaust pipe 4. In addition, the device adopts a dual-chamber mode, and each reaction chamber 5 performing the adsorption operation has two modes to switch, namely, adsorption mode and desorption mode, so that the indoor carbon dioxide concentration is stabilized at a set value or maintained within a set range. When the carbon dioxide adsorption structure 8 of one chamber reaches the specified adsorption amount (i.e., adsorption saturation), the carbon dioxide adsorption structure 8 of the other chamber is switched to continue adsorption and purification, and the saturated adsorption module can start the desorption and regeneration operation. In this way, the cycle is repeated to achieve long-term and uninterrupted adsorption of carbon dioxide in the air, thereby achieving continuous capture of carbon dioxide. At the same time, through the controller and the temperature sensor 11, the first concentration sensor 9, and the second concentration sensor 10 controlled by it, the operating status inside the reaction chamber 5 can be monitored in real time, and the controller can execute the set mode, adjust the working conditions of the heater 7 and the fan 6, and switch the first reversing valve 14 and the second reversing valve 15 to convert the gas outlet pipeline, so that the two reaction chambers 5 in the reaction box body circulate in turn, alternately performing carbon dioxide adsorption and desorption regeneration operations, and also realize the control of the desorption temperature in the reaction chamber 5, making the device safer and more reliable to use, and can also realize autonomous, continuous, and long-term capture of carbon dioxide, avoiding the equipment shutdown caused by material desorption when using a fixed adsorption module or the inconvenience caused by frequent material replacement when using a replaceable module. It can be seen that the device has a simple structure, is easy to operate, safe and stable, and provides a way to continuously and efficiently control the indoor carbon dioxide concentration.

[0057] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A circulating carbon dioxide capture device, characterized in that: The invention comprises a shell, wherein the shell is respectively connected to an air inlet duct, an air outlet duct and an exhaust duct; a reaction box is arranged in the shell, and the reaction box has two reaction chambers, each of which is equipped with a fan, a heater and a carbon dioxide adsorption structure; the air inlet duct is respectively connected to the air inlets of the two reaction chambers and is close to the fan, the fan is used to draw indoor air into the corresponding reaction chamber, and pass through the heater and the carbon dioxide adsorption structure, the carbon dioxide adsorption structure is used to adsorb carbon dioxide in the air passing through, and the heater is used to heat the air passing through and desorb the carbon dioxide adsorbed in the carbon dioxide adsorption structure; the two reaction chambers alternately adsorb and desorb carbon dioxide, so that the cyclically operated carbon dioxide capture device operates cyclically; The air outlet duct is connected to the air outlets of the two carbon dioxide adsorption structures, and is used to transport the air treated by carbon dioxide adsorption into the room; the exhaust duct is respectively connected to the air outlets of the two carbon dioxide adsorption structures, and is used to discharge the air treated by carbon dioxide desorption outdoors; the air outlet duct includes two air outlet pipes, and the exhaust duct includes two exhaust pipes, a connecting pipe and two delivery pipes; a first reversing valve is provided on the air outlet of each carbon dioxide adsorption structure; one end of each air outlet pipe and one end of each exhaust pipe are respectively connected to the two ends of the corresponding first reversing valve, and the other ends of the two exhaust pipes are commonly connected to one end of the connecting pipe; the other end of the connecting pipe is respectively connected to the two delivery pipes through a second reversing valve; the air outlet duct is used to transport the air treated by carbon dioxide adsorption into the room; the delivery pipe is used to discharge the air treated by carbon dioxide desorption outdoors.

2. The cyclically operated carbon dioxide capture device according to claim 1, characterized in that: The inner cavity of the carbon dioxide adsorption structure is filled with multiple layers of carbon dioxide adsorption material.

3. The cyclically operated carbon dioxide capture device according to claim 1, characterized in that: It also includes a controller, which is electrically connected to the fan and the heater, and is used to control the fan and the heater to be turned on or off.

4. The cyclically operated carbon dioxide capture device according to claim 3, characterized in that: A first concentration sensor is provided at the air inlet of the carbon dioxide adsorption structure, for measuring the carbon dioxide concentration at the air inlet of the carbon dioxide adsorption structure; a second concentration sensor is provided at the air outlet of the carbon dioxide adsorption structure, for measuring the carbon dioxide concentration at the air outlet of the carbon dioxide adsorption structure; the first concentration sensor and the second concentration sensor are respectively electrically connected to the controller, for sending the measured carbon dioxide concentration data to the controller.

5. The cyclically operated carbon dioxide capture device according to claim 3, characterized in that: A temperature sensor is provided in the middle of the carbon dioxide adsorption structure for measuring the desorption temperature in the carbon dioxide adsorption structure; the temperature sensor is electrically connected to the controller for sending measured desorption temperature data to the controller.

6. The cyclically operated carbon dioxide capture device according to claim 1, characterized in that: The air inlet duct includes two air inlet pipes; each of the air inlet pipes is connected to the air inlet of the corresponding reaction chamber and is close to the corresponding fan.

7. The cyclically operated carbon dioxide capture device according to claim 1, characterized in that: A one-way valve is installed on each exhaust pipe.

8. The cyclically operated carbon dioxide capture device according to claim 1, characterized in that: It also includes a heat exchanger, which is located below the reaction box body. The air inlet end of the air inlet duct passes through the heat exchanger, and the exhaust end of the exhaust duct passes through the heat exchanger. The heat exchanger is used to recover the heat of the exhaust air in the exhaust duct when the reaction chamber is performing carbon dioxide desorption treatment, and use the heat to preheat the intake air of the air inlet duct.

Images