Double-temperature-zone carbon dioxide synchronous capture and regeneration system and method

Abstract

The invention discloses a double-temperature-zone carbon dioxide synchronous capture and regeneration system and method, and belongs to the technical field of gas separation and carbon capture. Carbon dioxide adsorption modules are arranged in double ventilation pipes correspondingly, and the current direction of a thermoelectric refrigerating unit is switched through a control module; the temperature difference end alternately heats one ventilation pipe to achieve carbon dioxide desorption, the other ventilation pipe is cooled and ventilated to achieve carbon dioxide adsorption, the active heat dissipation device can assist in cooling when the temperature exceeds a threshold value, and synchronous capture and regeneration of carbon dioxide in the double-temperature area are achieved. In the heating and cooling switching process of the first ventilation pipe and the second ventilation pipe, the heat storage device can reasonably utilize heat by absorbing heat and storing heat, the influence caused by thermal inertia is weakened, heating and cooling integration is achieved, the energy utilization rate is increased, and meanwhile the carbon dioxide output blank period is shortened.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gas separation and carbon capture, and particularly relates to a double-temperature-zone carbon dioxide synchronous capture and regeneration system and method. BACKGROUND

[0002] Solid amine adsorbent is one of the core materials for capturing carbon dioxide directly from air, which can adsorb carbon dioxide at room temperature and desorb carbon dioxide after heating. In order to realize continuous operation, the existing carbon dioxide production system usually adopts a cold-hot alternating operation mode to collect and release carbon dioxide.

[0003] However, such a system has significant technical bottlenecks: first, the heating and cooling systems of the cold-hot alternating operation system are independent of each other, the system structure is complex, and the energy utilization rate is low; second, when the cold-hot alternating operation is performed, the thermal inertia of the traditional resistance heater will cause a long blank period in the entire carbon dioxide production cycle, affecting the efficiency of continuous and stable production of carbon dioxide by the system. SUMMARY

[0004] To solve the problems raised in the background, the application provides a double-temperature-zone carbon dioxide synchronous capture and regeneration system and method to solve the problems of low energy utilization rate and complex system of the existing double-adsorption-bed alternating operation system, and the problem of long blank period in the entire carbon dioxide production cycle caused by the thermal inertia of the traditional resistance heater.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: A double-temperature-zone carbon dioxide synchronous capture and regeneration system, comprising: a shell; a first ventilation pipe and a second ventilation pipe, wherein the first ventilation pipe and the second ventilation pipe are both provided with temperature sensors, the first ventilation pipe and the second ventilation pipe both penetrate the shell, the first ventilation pipe and the second ventilation pipe are both provided with a first fan and a second fan at a first end thereof, and the second end of the first ventilation pipe and the second ventilation pipe is a three-way structure comprising two branch pipes, one controllable valve is arranged on each branch pipe, and the first fan and the second fan are used to make air flow to the branch pipes; two carbon dioxide adsorption modules, wherein the two carbon dioxide adsorption modules are arranged in the first ventilation pipe and the second ventilation pipe respectively, the carbon dioxide adsorption modules adsorb carbon dioxide in air when not heated, and the carbon dioxide adsorption modules release the adsorbed carbon dioxide when heated; a thermoelectric refrigerator, wherein the thermoelectric refrigerator is arranged in the shell, and two temperature difference ends of the thermoelectric refrigerator are in contact with the pipe walls of the first ventilation pipe and the second ventilation pipe respectively; The active heat dissipation device and the heat storage device are in contact with the pipe wall of the first ventilation pipe and the second ventilation pipe, and the heat storage device is provided with a temperature sensor; The control module is connected with the temperature sensor, the first fan, the second fan, the valve, the thermoelectric refrigerator, the active heat dissipation device and the heat storage device, and is used for controlling the start and stop of each valve, the first fan and the second fan, the voltage and the current direction of the thermoelectric refrigerator, and the start and stop of the active heat dissipation device. The control module is also used for controlling the heat storage device to preliminarily dissipate heat and store heat for the first ventilation pipe or the second ventilation pipe whose temperature exceeds a preset threshold value, and controlling the heat storage device to use the stored heat to assist in heating the first ventilation pipe or the second ventilation pipe which needs to be heated.

[0006] A double-temperature-zone carbon dioxide synchronous capture and regeneration method, comprising the following steps: S1: one branch pipe of the first ventilation pipe and the second ventilation pipe is communicated with the carbon dioxide input end of the carbon dioxide demand equipment or the carbon dioxide demand space, and all the valves are in a closed state in the initial state; S2: the valve on the branch pipe of the first ventilation pipe and the second ventilation pipe which is not communicated with the carbon dioxide demand equipment or the carbon dioxide demand space is opened, the first fan and the second fan are started, and the first ventilation pipe and the second ventilation pipe both perform carbon dioxide adsorption action for a preset time length; S3: the valves on the branch pipes of the second ventilation pipe which are communicated with and not communicated with the carbon dioxide demand equipment or the carbon dioxide demand space are set to the closed state and the open state respectively, the second ventilation pipe performs carbon dioxide adsorption action, the second fan is set to the open state, and the valve of the first ventilation pipe which is opened and the first fan are closed; S4: the thermoelectric refrigerator is powered on and the current direction is controlled, so that the temperature difference end in contact with the first ventilation pipe is the heat release end, when the temperature in the first ventilation pipe reaches a first preset value, the valve on the branch pipe of the first ventilation pipe which is communicated with the carbon dioxide demand equipment or the carbon dioxide demand space is opened, and the first fan is started, and the first ventilation pipe performs carbon dioxide release action; S5: when the temperature in the first ventilation pipe reaches a second preset value, the active heat dissipation device is started to dissipate heat for the first ventilation pipe, and after the carbon dioxide release action of the first ventilation pipe lasts for a preset time length, the next step is entered; S6: the valves on the branch pipes of the first ventilation pipe which are communicated with and not communicated with the carbon dioxide demand equipment or the carbon dioxide demand space are set to the closed state and the open state respectively, the first ventilation pipe performs carbon dioxide adsorption action, the first fan is set to the open state, and the valve of the second ventilation pipe which is opened and the second fan are closed; S7: the thermoelectric refrigerator is powered on and the current direction is controlled, the temperature difference end in contact with the second ventilation pipe is the heat releasing end, when the temperature in the second ventilation pipe reaches the first preset value, the control module opens the valve on the branch pipe connecting the second ventilation pipe with the carbon dioxide demand equipment or the carbon dioxide demand space, and starts the second fan, and the second ventilation pipe releases carbon dioxide; S8: when the temperature in the second ventilation pipe reaches the second preset value, the active heat dissipation device is started to dissipate heat from the second ventilation pipe, and the carbon dioxide release action of the second ventilation pipe continues for a preset time length and then enters the next step; S9: S3-S8 are repeatedly performed, and the synchronous capture and regeneration of carbon dioxide in the double-temperature zones are completed.

[0007] Preferably, a recovery threshold is further provided, and the recovery threshold is less than the second threshold; When the first ventilation pipe or the second ventilation pipe releases carbon dioxide and the temperature reaches the recovery threshold, the control module controls the heat storage device to preliminarily dissipate heat and store heat until the carbon dioxide release operation is completed; When the first ventilation pipe or the second ventilation pipe releases carbon dioxide and the temperature does not reach the first threshold, the control module controls the heat storage device that has stored heat to heat, until the temperature inside the heat storage module is the same as the temperature thereof, and the heat transfer between the two is stopped.

[0008] Compared with the prior art, the application has the following beneficial effects: The first ventilation pipe and the second ventilation pipe are respectively provided with carbon dioxide adsorption modules, the current direction of the thermoelectric refrigerator is switched by the control module, the temperature difference end of the thermoelectric refrigerator alternately heats one of the ventilation pipes to realize carbon dioxide desorption, and cools and ventilates the other ventilation pipe to realize carbon dioxide adsorption, the active heat dissipation device can assist in cooling when the temperature exceeds the threshold, the synchronous capture and regeneration of carbon dioxide in the double-temperature zones are realized, the heat storage device can reasonably utilize heat by absorbing and storing heat during the switching of the heating and cooling of the first ventilation pipe and the second ventilation pipe, and the influence of thermal inertia is weakened, the application realizes the integration of heating and cooling, improves the energy utilization rate, and shortens the carbon dioxide production blank period. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 The specific structure of the application is shown in the figure; Figure 2 is the bottom view of Figure 1 ; Figure 3 is a specific connection structure diagram of the first ventilation pipe; Figure 4 is a structure diagram of the heat storage device; In the figure, the mark is: 1-Outer shell; 2-First heat sink; 3-Carbon dioxide adsorption particles; 4-First fan; 5-First metal sheet; 6-First N-type semiconductor; 7-Second N-type semiconductor; 8-Second metal sheet; 9-Second fan; 10-Second heat sink; 11-Second ventilation duct; 12-Fourth solenoid valve; 13-Third solenoid valve; 14-Second P-type semiconductor; 15-Heat-conducting connector; 16-Second solenoid valve; 17-First P-type semiconductor; 18-First solenoid valve; 19-First ventilation duct; 20-Guide shroud; 21-First heat-conducting sheet; 22-Second heat-conducting sheet; 23-Water tank; 24-Push rod motor. Detailed Implementation

[0010] To facilitate understanding of the technical content of this invention by those skilled in the art, the invention will be further described in detail below with reference to the accompanying drawings and specific examples. It should be understood that the specific examples described herein are merely illustrative and not intended to limit the scope of the invention.

[0011] A dual-temperature zone carbon dioxide simultaneous capture and regeneration system includes: The outer shell 1 has two partitions inside, which divide the interior of the outer shell 1 into a first cavity, a second cavity, and a third cavity arranged in a sealed manner. The outer shell 1 is made of heat-insulating and insulating material, such as polycarbonate board. First ventilation pipe 19 and second ventilation pipe 11; First ventilation pipe 19 is disposed through the first cavity, and second ventilation pipe 11 is disposed through the third cavity. Temperature sensors are provided in both first ventilation pipe 19 and second ventilation pipe 11. First fan 4 and second fan 9 are respectively disposed in the first end of first ventilation pipe 19 and second ventilation pipe 11. The power lines of first fan 4 and second fan 9 pass through the pipe wall and outer shell 1 and are connected to the control module. The second end of first ventilation pipe 19 and second ventilation pipe 11 are both three-way structures including two branch pipes. Each branch pipe is provided with a valve that can be controlled to open and close. The two valves on first ventilation pipe 19 are first solenoid valve 18 and second solenoid valve 16, and the valves on second ventilation pipe 11 are third solenoid valve 13 and fourth solenoid valve 12. First fan 4 and second fan 9 are used to make air flow to the branch pipes. The pipe walls of first ventilation pipe 19 and second ventilation pipe 11 are both made of insulating and heat-conducting materials, such as ceramic. Two carbon dioxide adsorption modules are respectively installed in the first ventilation pipe 19 and the second ventilation pipe 11. Each carbon dioxide adsorption module includes carbon dioxide adsorption particles 3 and multiple breathable meshes arranged in parallel with each other. The carbon dioxide adsorption particles 3 are made of the carbon dioxide adsorption material involved in the patent application number CN202410482343.X entitled "Carbon Dioxide Capturing Material for Mosquito Trapping Equipment and its Preparation Method". When the carbon dioxide adsorption particles 3 are not heated, they adsorb carbon dioxide in the air. When the carbon dioxide adsorption particles 3 are heated, they release the adsorbed carbon dioxide. The breathable meshes are all installed in the first ventilation pipe 19 or the second ventilation pipe 11. The periphery of each breathable mesh is fixedly connected to the periphery of the inner wall of the first ventilation pipe 19 or the second ventilation pipe 11. Carbon dioxide adsorption particles 3 are filled between every two adjacent breathable meshes. The mesh diameter of the breathable mesh is smaller than the diameter of a single carbon dioxide adsorption particle 3. The breathable mesh is made of metal.

[0012] A thermoelectric cooler is disposed in the second cavity. One end of the thermoelectric cooler, which has a temperature difference, passes through a partition and contacts the wall of the first ventilation pipe 19 or the second ventilation pipe 11. The thermoelectric cooler is a cascaded thermoelectric cooler. The cascaded thermoelectric cooler includes a heat-conducting connector 15, four metal substrates, a first P-type semiconductor 17 and a first N-type semiconductor 6, a second P-type semiconductor 14 and a second N-type semiconductor 7, a first metal sheet 5, and a second metal sheet 8. The heat-conducting connector 15 is disposed in the second cavity and is made of a ceramic-based material such as alumina or aluminum nitride. Two metal substrates are fixedly disposed on the first side of the heat-conducting connector 15, and the other two metal substrates are fixedly disposed on the second side of the heat-conducting connector 15. Each metal substrate is connected by a pipe that passes through the outer... The wires of the shell 1 are connected to the control module; the first ends of the first P-type semiconductor 17 and the first N-type semiconductor 6 are respectively fixedly connected to two metal plates disposed on the first side of the heat-conducting connector 15; the first ends of the second P-type semiconductor 14 and the second N-type semiconductor 7 are respectively fixedly connected to two metal plates disposed on the second side of the heat-conducting connector 15; the first metal plate 5 is an arc-shaped plate, which is attached to the outer wall of the first ventilation pipe 19, and the second ends of the first P-type semiconductor 17 and the first N-type semiconductor 6 are both fixedly connected to the first metal plate 5; the second metal plate 8 is an arc-shaped plate, which is attached to the outer wall of the second ventilation pipe 11, and the second ends of the second P-type semiconductor 14 and the second N-type semiconductor 7 are both fixedly connected to the second metal plate 8.

[0013] An active heat dissipation device and a heat storage device are included; both the active heat dissipation device and the heat storage device are in contact with the walls of the first ventilation duct 19 and the second ventilation duct 11, and a temperature sensor is installed inside the heat storage device; the active heat dissipation device includes a first heat dissipation mechanism and a second heat dissipation mechanism made of copper, as well as two air guide shrouds 20 and two cooling fans. The first heat dissipation mechanism includes a first base and a plurality of parallel first heat dissipation fins 2. The first surface of the first base is arc-shaped and is attached to the outer wall of the first ventilation duct 19. The plurality of parallel first heat dissipation fins 2 are integrally formed on the second surface of the first base, and the ends of the first heat dissipation fins 2 pass through the outer shell 1 and are disposed outside the outer shell 1. The second heat dissipation mechanism includes a second base and a plurality of parallel second heat dissipation fins 10. The first surface of the second base is arc-shaped and is attached to the outer wall of the second ventilation duct 11. The plurality of parallel second heat dissipation fins 10 are integrally formed on the second surface of the first base. The body is formed on the second surface of the second base, and the end of the second heat sink 10 passes through the outer shell 1 and is disposed outside the outer shell 1; the flow guide 20 is a strip-shaped cover, and the flow guide 20 is fastened to the outer shell 1. The ends of all the first heat sinks 2 are disposed in one flow guide 20, and the ends of all the second heat sinks 10 are disposed in another flow guide 20. Each flow guide 20 has an opening at both ends; a cooling fan is disposed in an opening of one flow guide 20. The cooling fan is connected to the control module and is used to drive airflow through the area between two adjacent first heat sinks 2 or second heat sinks 10.

[0014] The heat storage unit includes a first heat-conducting block made of copper, a second heat-conducting block, a push rod motor 24, and a water tank 23. The first ventilation duct 19 and the second ventilation duct 11 are arranged parallel to each other. The end face of the first end of the first heat-conducting block is curved and fits against the outer wall of the first ventilation duct 19. The second end of the first heat-conducting block is integrally formed with multiple parallel first heat-conducting plates 21, the end of each first heat-conducting plate 21 passing through the outer shell 1 and disposed outside the outer shell 1. The end face of the first end of the second heat-conducting block is curved and fits against the outer wall of the second ventilation duct 11. The second end of the second heat-conducting block is integrally formed with multiple parallel second heat-conducting plates 22, the end of each second heat-conducting plate 22 passing through the outer shell 1 and disposed outside the outer shell 1. Both the first heat-conducting plates 21 and the second heat-conducting plates 22 are perpendicular to the first ventilation duct 19 or the second ventilation duct 11. The push rod motor 24 is connected to the control module. The first heat-conducting plate 21 and the second heat-conducting plate 22 are both parallel to the push rod of the push rod motor 24. The water tank 23 contains a liquid medium, such as H2O. The bottom surface of the water tank 23 is fixedly connected to the push rod of the push rod motor 24. The water tank 23 is made of heat-insulating material. The first surface of the water tank 23 has multiple parallel through slots that match the first heat-conducting plate 21 and the second heat-conducting plate 22. The bottom and wall of the first end of each through slot are made of heat-conducting material, such as copper. The copper at this point is in contact with the liquid medium in the water tank 23. The push rod motor 24 is used to control the extension and retraction amount through the control module to realize the first heat-conducting plate 21 or the second heat-conducting plate 22 being embedded with the heat-conducting material part or the heat-insulating material part of the through slot, or in contact with the outside air.

[0015] The control module is connected to the temperature sensor, the first fan 4, the second fan 9, the valves, the thermoelectric cooler, the active heat dissipation device, and the heat storage device. The control module is used to control the start and stop of each valve, the first fan 4, and the second fan 9, the voltage and current direction through the thermoelectric cooler, and the start and stop of the active heat dissipation device. The control module is also used to control the heat storage device to perform preliminary heat dissipation and store heat on the first ventilation pipe 19 or the second ventilation pipe 11 whose temperature exceeds the preset threshold, and to control the heat storage device to use the stored heat to provide auxiliary heating for the first ventilation pipe 19 or the second ventilation pipe 11 that needs to be heated. The control module includes a microcontroller with an integrated ADC, a relay module, an H-bridge driver module, MOSFETs / IGBTs, freewheeling diodes, and a regulated power supply module. The microcontroller acts as the control center, responsible for reading temperature sensor data, running control programs, and outputting control signals. The relay module receives instructions from the microcontroller to connect and disconnect the power circuit. The H-bridge driver module changes the direction of current in electrical appliances, switching the current path by controlling the power transistors via the microcontroller. The MOSFETs / IGBTs, in conjunction with PWM technology, adjust the voltage of electrical appliances to meet the power requirements of the thermoelectric cooler's temperature difference setting. The freewheeling diode absorbs the back electromotive force generated during the switching of the relays and power transistors, protecting the microcontroller and core components. The regulated power supply module provides a matched and stable power supply to the microcontroller, preventing voltage conflicts from damaging the equipment.

[0016] A method for simultaneous capture and regeneration of carbon dioxide in two temperature zones includes the following steps: S1: Connect the branch pipes containing the first solenoid valve 18 and the third solenoid valve 13 to the carbon dioxide input end of the carbon dioxide demand equipment or carbon dioxide demand space. In the initial state, all valves are closed. S2: Open the second solenoid valve 16 and the fourth solenoid valve 12, and start the first fan 4 and the second fan 9. The first ventilation pipe 19 and the second ventilation pipe 11 both perform carbon dioxide adsorption action for a preset duration. S3: Set the third solenoid valve 13 and the fourth solenoid valve 12 to the closed and open states respectively, the second ventilation pipe 11 performs carbon dioxide adsorption, the second fan 9 is set to the open state, and the valves of the first ventilation pipe 19 that have been opened and the first fan 4 are closed. S4: Power on the thermoelectric cooler and control the direction of the current so that the end with the temperature difference in contact with the first ventilation pipe 19 is the heat release end. When the temperature inside the first ventilation pipe 19 reaches 65°C, open the first solenoid valve 18 and start the first fan 4 to run at low power to increase the carbon dioxide concentration. The first ventilation pipe 19 then performs a carbon dioxide release action. S5: When the temperature inside the first ventilation duct 19 reaches 120°C or above, start the cooling fan to dissipate heat from the first heat sink 2 in contact with the first ventilation duct 19, and control the power of the cooling fan to ensure that the temperature does not exceed 125°C. After the carbon dioxide release action of the first ventilation duct 19 continues for a preset time, proceed to the next step. S6: Set the first solenoid valve 18 and the second solenoid valve 16 to the closed state and the open state respectively, the first ventilation pipe 19 performs carbon dioxide adsorption, set the first fan 4 to the open state, and close the valve that has been opened in the second ventilation pipe 11 and the second fan 9. S7: Power on the thermoelectric cooler and control the direction of the current so that the end with the temperature difference in contact with the second ventilation pipe 11 is the heat release end. When the temperature inside the second ventilation pipe 11 reaches 65°C, the control module opens the third solenoid valve 13 and starts the second fan 9 to run at low power to increase the carbon dioxide concentration. The second ventilation pipe 11 then performs a carbon dioxide release action. S8: When the temperature inside the second ventilation duct 11 reaches 120°C, the cooling fan is started to dissipate heat from the second heat sink 10 in contact with the second ventilation duct 11, and the power of the cooling fan is controlled to ensure that the temperature does not exceed 125°C. The carbon dioxide release action of the second ventilation duct 11 continues for a preset time before proceeding to the next step. S9: Repeat S3-S8 continuously to complete the simultaneous capture and regeneration of carbon dioxide in both temperature zones.

[0017] A dual-temperature zone carbon dioxide simultaneous capture and regeneration method also includes a recovery threshold of 110°C. When the first ventilation pipe 19 or the second ventilation pipe 11 releases carbon dioxide and the temperature reaches 115°C, the control module controls the push rod of the push rod motor 24 to extend and retract, so that the heat-conducting material part of the water tank 23 channel is engaged with the first heat-conducting plate 21 or the second heat-conducting plate 22. After absorbing heat, the water temperature will rise accordingly. When the water temperature rises to a maximum of 100°C, the water tank 23 can no longer absorb heat. This process continues until the carbon dioxide release operation ends. In this process, the optimal adsorption temperature of the carbon dioxide adsorption material used in this application is 25°C, and the optimal desorption temperature is 120°C. Since the cascaded thermoelectric cooler needs to maintain a temperature difference of 95°C, the power needs to be constant. However, Joule heat is continuously accumulated. Therefore, at 115°C, the water tank 23 can perform preliminary heat dissipation, slow down the heating rate, prolong the duration of the temperature at around 120°C, and increase the desorption efficiency. When the water tank 23 can no longer absorb heat or the temperature has reached 120°C, the cooling fan is started and the power of the cooling fan is adjusted. By controlling the speed of airflow through the first heat sink 2 or the second heat sink 10, the efficiency of heat convection heat dissipation is controlled, so that the temperature is kept below 125°C. When the first ventilation duct 19 or the second ventilation duct 11 releases carbon dioxide and the temperature does not reach 65°C, the control module controls the push rod of the push rod motor 24 to extend or retract, causing the heat-conducting material part of the water tank 23 channel to engage with the first heat-conducting plate 21 or the second heat-conducting plate 22. After heat is released, the water temperature will drop accordingly. When the water temperature is the same as the temperature of the first ventilation duct 19 or the second ventilation duct 11, the water tank 23 can no longer release heat but will instead begin to absorb heat. At this time, the control module controls the push rod of the push rod motor 24 to extend or retract, causing the heat-insulating material part of the water tank 23 channel to engage with the first heat-conducting plate 21 or the second heat-conducting plate 22. The first heat-conducting plate 21 or the second heat-conducting plate 22 are embedded to achieve heat preservation while in standby mode. In application scenarios with short hot and cold cycles, an additional water cooling device can be set up to transfer heat from the water in the water tank. For example, a cooling pipe connected to the water pool can be installed through the water tank. A water pump connected to the control module can make cold water flow in the cooling pipe and then inject it back into the water pool to remove excess heat in the water tank 23 and prepare for subsequent cooling. When the first ventilation pipe 19 or the second ventilation pipe 11 releases carbon dioxide and the temperature reaches 115°C, the preliminary heat dissipation and heat absorption operations described above are performed.

[0018] The dual ventilation ducts of this application are each equipped with a carbon dioxide adsorption module. By controlling the module to switch the current direction of the thermoelectric cooler, the temperature difference end alternately heats one ventilation duct to achieve carbon dioxide desorption and cools and ventilates the other ventilation duct to achieve carbon dioxide adsorption. The active heat dissipation device can assist in cooling when the temperature exceeds the threshold, realizing the synchronous capture and regeneration of carbon dioxide in the dual temperature zones. During the switching between heating and cooling of the first ventilation duct 19 and the second ventilation duct 11, the heat storage device can make reasonable use of heat by absorbing and storing heat, reducing the impact of thermal inertia. This application realizes integrated heating and cooling, improves energy utilization, and shortens the carbon dioxide production gap period.

[0019] This application has significant advantages over existing technologies: First, the integrated thermoelectric cooler achieves heating and cooling, replacing an independent system. With the help of heat recovery, the energy utilization rate is increased by more than 30%, simplifying the structure and reducing energy consumption. Secondly, the cascaded thermoelectric cooler has a fast response time. When combined with a heat storage device, it can avoid the thermal inertia of traditional resistance heaters. Combined with the dual-tube alternating mode, it can shorten the production gap period and ensure continuous and stable carbon dioxide production. Third, the control module coordinates automated regulation, reduces manual intervention, improves system reliability and intelligence, and lowers operating costs.

Claims

1. A dual-temperature zone carbon dioxide simultaneous capture and regeneration system, characterized in that, include: Outer shell (1); First ventilation pipe (19) and second ventilation pipe (11); temperature sensors are provided in both the first ventilation pipe (19) and the second ventilation pipe (11). Both the first ventilation pipe (19) and the second ventilation pipe (11) are installed through the outer shell (1). A first fan (4) and a second fan (9) are respectively provided in the first end of the first ventilation pipe (19) and the second ventilation pipe (11). The second end of the first ventilation pipe (19) and the second ventilation pipe (11) are both three-way structures including two branch pipes. Each branch pipe is provided with a valve that can be controlled to open and close. The first fan (4) and the second fan (9) are used to make air flow to the branch pipe. Two carbon dioxide adsorption modules are respectively installed in the first ventilation pipe (19) and the second ventilation pipe (11). When the carbon dioxide adsorption module is not heated, the carbon dioxide adsorption module adsorbs carbon dioxide in the air. When the carbon dioxide adsorption module is heated, the carbon dioxide adsorption module releases the adsorbed carbon dioxide. Thermoelectric cooler; The thermoelectric cooler is installed in the outer casing (1), and the two temperature difference ends of the thermoelectric cooler are in contact with the pipe walls of the first ventilation pipe (19) and the second ventilation pipe (11), respectively; Active heat dissipation device and heat storage device; both active heat dissipation device and heat storage device are in contact with the pipe walls of the first ventilation pipe (19) and the second ventilation pipe (11), and the heat storage device is equipped with a temperature sensor. The control module is connected to the temperature sensor, the first fan (4), the second fan (9), the valve, the thermoelectric cooler, the active heat dissipation device and the heat storage device. The control module is used to control the start and stop of each valve and the first fan (4) and the second fan (9), the voltage and current direction through the thermoelectric cooler, and the start and stop of the active heat dissipation device. The control module is also used to control the heat storage device to perform preliminary heat dissipation and store heat on the first ventilation pipe (19) or the second ventilation pipe (11) whose temperature exceeds the preset threshold, and to control the heat storage device to use the stored heat to provide auxiliary heating for the first ventilation pipe (19) or the second ventilation pipe (11) that needs to be heated.

2. The dual-temperature zone carbon dioxide simultaneous capture and regeneration system according to claim 1, characterized in that, The outer shell (1) is provided with two partitions, which divide the interior of the outer shell (1) into a first cavity, a second cavity and a third cavity arranged in a sealed manner. The first ventilation pipe (19) is arranged through the first cavity, and the second ventilation pipe (11) is arranged through the third cavity. The thermoelectric cooler is arranged in the second cavity. One end of the thermoelectric cooler passes through a partition and contacts the pipe wall of the first ventilation pipe (19) or the second ventilation pipe (11).

3. The dual-temperature zone carbon dioxide simultaneous capture and regeneration system according to claim 2, characterized in that, The thermoelectric cooler is a cascaded thermoelectric cooler.

4. The dual-temperature zone carbon dioxide simultaneous capture and regeneration system according to claim 3, characterized in that, Cascaded thermoelectric coolers include: Thermally conductive connector (15); the thermally conductive connector (15) is disposed in the second cavity; Four metal plates; two metal plates are fixedly installed on the first side of the heat-conducting connector (15), and the other two metal plates are fixedly installed on the second side of the heat-conducting connector (15). Each metal plate is connected to the control module through a wire. A first P-type semiconductor (17) and a first N-type semiconductor (6); the first ends of the first P-type semiconductor (17) and the first N-type semiconductor (6) are respectively fixedly connected to two metal substrates disposed on the first side of the heat-conducting connector (15); The second P-type semiconductor (14) and the second N-type semiconductor (7); the first ends of the second P-type semiconductor (14) and the second N-type semiconductor (7) are respectively fixedly connected to two metal substrates disposed on the second side of the heat-conducting connector (15); First metal sheet (5); the first metal sheet (5) is an arc-shaped plate, and the first metal sheet is attached to the outer wall of the first ventilation pipe (19). The second ends of the first P-type semiconductor (17) and the first N-type semiconductor (6) are fixedly connected to the first metal sheet (5). The second metal sheet (8) is an arc-shaped plate. The second metal sheet is attached to the outer wall of the second ventilation pipe (11). The second ends of the second P-type semiconductor (14) and the second N-type semiconductor (7) are fixedly connected to the second metal sheet (8). The pipe walls of the first ventilation pipe (19) and the second ventilation pipe (11) are both made of insulating and heat-conducting materials.

5. The dual-temperature zone carbon dioxide simultaneous capture and regeneration system according to claim 1, characterized in that, A carbon dioxide adsorption module includes: Carbon dioxide adsorption particles (3); when the carbon dioxide adsorption particles (3) are not heated, the carbon dioxide adsorption particles (3) adsorb carbon dioxide in the air; when the carbon dioxide adsorption particles (3) are heated, the carbon dioxide adsorption particles (3) release the adsorbed carbon dioxide. Multiple breathable meshes are arranged in parallel to each other; the breathable meshes are all set in the first ventilation pipe (19) or the second ventilation pipe (11), and the periphery of each breathable mesh is fixedly connected to the periphery of the inner wall of the first ventilation pipe (19) or the second ventilation pipe (11). Carbon dioxide adsorption particles (3) are filled between every two adjacent breathable meshes. The mesh diameter of the breathable mesh is smaller than the diameter of a single carbon dioxide adsorption particle (3).

6. The dual-temperature zone carbon dioxide simultaneous capture and regeneration system according to claim 1, characterized in that, Active cooling devices include: First heat dissipation mechanism; The first heat dissipation mechanism includes a first base and a plurality of parallel first heat dissipation fins (2). The first surface of the first base is an arc-shaped surface. The first surface of the first base is attached to the outer side wall of the first ventilation pipe (19). The plurality of parallel first heat dissipation fins (2) are integrally formed on the second surface of the first base. The ends of the first heat dissipation fins (2) pass through the outer shell (1) and are disposed outside the outer shell (1). Second heat dissipation mechanism; The second heat dissipation mechanism includes a second base and a plurality of parallel second heat dissipation fins (10). The first surface of the second base is an arc-shaped surface. The first surface of the second base is attached to the outer side wall of the second ventilation pipe (11). The plurality of parallel second heat dissipation fins (10) are integrally formed on the second surface of the second base. The ends of the second heat dissipation fins (10) pass through the outer shell (1) and are disposed outside the outer shell (1). Two flow guides (20); the flow guides (20) are strip-shaped covers, and the flow guides (20) are fastened to the outer shell (1). The ends of all the first heat sinks (2) are set in one flow guide (20), and the ends of all the second heat sinks (10) are set in another flow guide (20). Each flow guide (20) has an opening at both ends. Two cooling fans; one cooling fan is set in the opening of a shroud (20), the cooling fan is connected to the control module, and the cooling fan is used to drive airflow through the area between two adjacent first heat sinks (2) or second heat sinks (10).

7. The dual-temperature zone carbon dioxide simultaneous capture and regeneration system according to claim 1, characterized in that, The heat storage unit includes: The first heat-conducting block; the first ventilation pipe (19) and the second ventilation pipe (11) are arranged in parallel to each other. The end face of the first end of the first heat-conducting block is curved. The end face of the first end of the first heat-conducting block is attached to the outer wall of the first ventilation pipe (19). The second end of the first heat-conducting block is integrally formed with a plurality of parallel first heat-conducting plates (21). The end of each first heat-conducting plate (21) passes through the outer shell (1) and is located outside the outer shell (1). The second heat-conducting block has a curved end face at the first end, which is in contact with the outer wall of the second ventilation pipe (11). The second end of the second heat-conducting block is integrally formed with multiple parallel second heat-conducting plates (22). The end of each second heat-conducting plate (22) passes through the outer shell (1) and is located outside the outer shell (1). The first heat-conducting plate (21) and the second heat-conducting plate (22) are both perpendicular to the first ventilation pipe (19) or the second ventilation pipe (11). A push rod motor (24) is connected to the control module. The first heat-conducting plate (21) and the second heat-conducting plate (22) are both parallel to the push rod of the push rod motor (24). Water tank (23); The water tank (23) contains a liquid medium. The bottom surface of the water tank (23) is fixedly connected to the push rod of the push rod motor (24). The water tank (23) is made of heat insulation material. The first surface of the water tank (23) is provided with multiple parallel through slots that match the first heat-conducting plate (21) and the second heat-conducting plate (22). The material of the bottom and wall of the first end of each through slot is heat-conducting material. The push rod motor (24) is used to control the extension and retraction amount through the control module to realize the first heat-conducting plate (21) or the second heat-conducting plate (22) being embedded with the heat-conducting material part or the heat insulation material part of the through slot, or in contact with the outside air.

8. The dual-temperature zone carbon dioxide simultaneous capture and regeneration system according to claim 1, characterized in that, The outer shell (1) is made of heat-insulating material.

9. A method for simultaneous capture and regeneration of carbon dioxide in a dual-temperature zone, applied to a simultaneous capture and regeneration system for carbon dioxide in a dual-temperature zone as described in claims 1-8, characterized in that, Includes the following steps: S1: Connect one branch pipe of the first ventilation pipe (19) and the second ventilation pipe (11) to the carbon dioxide input end of the carbon dioxide demand equipment or carbon dioxide demand space. In the initial state, all valves are closed. S2: Open the valves on the branch pipes of the first ventilation pipe (19) and the second ventilation pipe (11) that are not connected to the carbon dioxide demand equipment or the carbon dioxide demand space, start the first fan (4) and the second fan (9), and both the first ventilation pipe (19) and the second ventilation pipe (11) will perform carbon dioxide adsorption for a preset duration. S3: Set the valves on the branch pipes that are connected to and not connected to the carbon dioxide demand equipment or carbon dioxide demand space of the second ventilation pipe (11) to be in the closed state and the open state respectively. The second ventilation pipe (11) performs carbon dioxide adsorption action. Set the second fan (9) to be in the open state and close the valves that have been opened on the first ventilation pipe (19) and the first fan (4). S4: Power on the thermoelectric cooler and control the direction of the current so that the end with the temperature difference in contact with the first ventilation pipe (19) is the heat release end. When the temperature inside the first ventilation pipe (19) reaches the first preset value, open the valve on the branch pipe connecting the first ventilation pipe (19) to the carbon dioxide demand equipment or carbon dioxide demand space, and start the first fan (4). The first ventilation pipe (19) performs carbon dioxide release action. S5: When the temperature inside the first ventilation pipe (19) reaches the second preset value, the active heat dissipation device is activated to dissipate heat from the first ventilation pipe (19). The carbon dioxide release action of the first ventilation pipe (19) continues for a preset time before proceeding to the next step. S6: Set the valves on the branch pipes that are connected to and not connected to the carbon dioxide demand equipment or carbon dioxide demand space of the first ventilation pipe (19) to be in the closed state and the open state respectively. The first ventilation pipe (19) performs carbon dioxide adsorption action. Set the first fan (4) to be in the open state. Close the valves that have been opened on the second ventilation pipe (11) and the second fan (9). S7: Power on the thermoelectric cooler and control the direction of the current so that the end with the temperature difference in contact with the second ventilation pipe (11) is the heat release end. When the temperature inside the second ventilation pipe (11) reaches the first preset value, the control module opens the valve on the branch pipe connecting the second ventilation pipe (11) to the carbon dioxide demand equipment or carbon dioxide demand space, and starts the second fan (9). The second ventilation pipe (11) performs carbon dioxide release action. S8: When the temperature inside the second ventilation pipe (11) reaches the second preset value, the active heat dissipation device is activated to dissipate heat from the second ventilation pipe (11). The carbon dioxide release action of the second ventilation pipe (11) continues for a preset time before proceeding to the next step. S9: Repeat S3-S8 continuously to complete the simultaneous capture and regeneration of carbon dioxide in both temperature zones.

10. The method for simultaneous capture and regeneration of carbon dioxide in a dual-temperature zone according to claim 9, characterized in that, A recycling threshold is also set, which is less than the second threshold; When the first ventilation pipe (19) or the second ventilation pipe (11) performs carbon dioxide release and the temperature reaches the recovery threshold, the control module controls the heat storage device to perform initial heat dissipation and heat storage until the carbon dioxide release operation ends. When the first ventilation pipe (19) or the second ventilation pipe (11) releases carbon dioxide and the temperature does not reach the first threshold, the control module controls the heat storage device that has stored heat to heat it until the internal temperature of the heat storage module is the same as its temperature, and then stops the heat transfer between the two.

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