A dual channel carbon dioxide absorption device

Abstract

The utility model discloses a double -channel carbon dioxide absorption device, specifically at gas separation and carbon dioxide capture technical field. Double -channel carbon dioxide absorption device, include: at least two adsorption chambers, gas inlet pipeline is connected to each adsorption chamber's entrance with flue gas source intercommunication, be provided with the control valve for the selective to each adsorption chamber and pass in flue gas on the gas inlet pipeline, exhaust pipeline is set up in each adsorption chamber's top, is used for discharging the gas after absorbing carbon dioxide, collection pipeline is connected to each adsorption chamber's outlet intercommunication, is used for collecting the carbon dioxide that desorbs, wherein, each adsorption chamber is provided with at least one adsorption unit. The double -channel carbon dioxide absorption device provided by the utility model improves desorption efficiency significantly through the built -in high -efficient heating and forced purging regeneration mechanism, reduces energy consumption, and realizes intelligent control.

Description

Technical Field

[0001] This utility model relates to the field of gas separation and carbon dioxide capture technology, and in particular to a dual-channel carbon dioxide absorption device. Background Technology

[0002] In today's world, global warming has made carbon dioxide capture a key research area for addressing the greenhouse effect. Currently, carbon dioxide capture methods mainly encompass pre-combustion capture, post-combustion capture, and oxy-fuel combustion technologies. Among these methods, post-combustion capture is the most mature carbon dioxide capture method.

[0003] Commonly used post-combustion capture technologies include absorption, membrane separation, and adsorption. Adsorption relies on adsorbents with abundant pore structures and special adsorption properties, such as molecular sieves and activated carbon. When a mixed gas passes through an adsorbent bed, carbon dioxide is adsorbed onto the surface of the adsorbent, achieving the capture purpose. After adsorption saturation, it can be regenerated and recycled by changing conditions such as temperature and pressure.

[0004] Although post-combustion capture technologies are relatively mature, these methods still need improvement in terms of efficiency and cost. Adsorbent regeneration in adsorption methods typically requires external heating, resulting in high regeneration energy consumption, uneven heat transfer, slow desorption rates, and difficulty in further improving overall treatment efficiency. Furthermore, the investment, operation, and maintenance costs of related equipment are also quite high, all of which limit the large-scale commercial application and promotion of carbon dioxide capture technologies.

[0005] Therefore, there is an urgent need for a carbon dioxide adsorption device with high regeneration efficiency, low energy consumption, and stable operation. Utility Model Content

[0006] In order to overcome the shortcomings of the existing technology, this utility model provides a dual-channel carbon dioxide absorption device, which significantly improves desorption efficiency, reduces energy consumption, and achieves intelligent control through a built-in high-efficiency heating and forced purging regeneration mechanism.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A dual-channel carbon dioxide absorption device includes: at least two adsorption chambers; an inlet pipe connected to a flue gas source and respectively connected to the inlet of each adsorption chamber, wherein the inlet pipe is equipped with a control valve for selectively introducing flue gas into each adsorption chamber; an exhaust pipe located at the top of each adsorption chamber for discharging the gas after carbon dioxide absorption; and a collection pipe connected to the outlet of each adsorption chamber for collecting the desorbed carbon dioxide; wherein each adsorption chamber is equipped with at least one adsorption unit, the adsorption unit including a container with a permeable structure and an adsorbent filled in the container; and the adsorption unit is equipped with a heating regeneration mechanism.

[0009] Preferably, the heating regeneration mechanism includes:

[0010] An isolation tube is installed inside the container, and the tube wall has multiple vent holes.

[0011] An electric heating element housed within the isolation tube;

[0012] The electric heating element is connected to an external power source through a fixed structure that penetrates the wall of the adsorption chamber.

[0013] Preferably, it further includes a purging system, the purging system comprising:

[0014] The gas delivery pump has its inlet connected to the internal space of the adsorption chamber in the desorption state via a suction pipe;

[0015] The main gas delivery pipeline is connected to the outlet of the gas delivery pump;

[0016] Multiple branch lines, the number of which corresponds to the number of isolation pipes, with the inlet of each branch line connected to the main gas supply line and its outlet extending into the interior of a corresponding isolation pipe.

[0017] The branch pipe has an air outlet on its wall to guide the airflow direction, so that the gas flowing out of the air outlet can directly blow on the surface of the electric heating element.

[0018] Preferably, it further includes a control system, the control system comprising:

[0019] A temperature sensing element is installed on the collection pipeline to detect the temperature of the desorbed gas;

[0020] A gas concentration detection element is disposed inside the adsorption chamber to detect the carbon dioxide concentration inside the adsorption chamber;

[0021] The controller is electrically connected to the temperature detection element, the gas concentration detection element, the gas delivery pump, and each control valve.

[0022] The controller executes the following control logic:

[0023] When an adsorption chamber enters the desorption state, its corresponding electric heating elements are activated.

[0024] When the temperature detected by the temperature detection element reaches the first preset threshold, the gas delivery pump is started;

[0025] When the concentration detected by the gas concentration detection element drops to a second preset threshold, the gas delivery pump and the electric heating element are turned off.

[0026] Preferably, the adsorbent is a mesoporous molecular sieve.

[0027] Preferably, the mesoporous molecular sieve is an SBA-type molecular sieve.

[0028] Preferably, there are two adsorption chambers, namely a first adsorption chamber (1A) and a second adsorption chamber (1B); the control valve includes a first control valve (V1) and a second control valve (V2) disposed on the air inlet pipe, respectively corresponding to the first adsorption chamber (1A) and the second adsorption chamber (1B).

[0029] Preferably, the number of adsorption chambers is at least three; the air intake pipeline is extended into an air intake manifold with multiple branches, each branch having an independent control valve; the controller can control at least one of the multiple adsorption chambers to perform a desorption operation, while controlling the remaining adsorption chambers to perform an adsorption operation.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] (1) The adsorbent bed is heated directly by the built-in electric heating element and combined with forced circulation purging, which greatly improves the heat utilization efficiency and desorption rate and significantly reduces the regeneration energy consumption.

[0032] (2) The purging airflow acts directly on the electric heating element and diffuses the hot air evenly to the entire adsorbent bed through the vent on the isolation tube, thus avoiding the problems of local overheating or incomplete regeneration.

[0033] (3) Automatic control based on temperature and concentration feedback ensures that the device always operates under optimal conditions, improving operational stability and collection efficiency while reducing manual intervention.

[0034] (4) The dual-channel or multi-channel design enables continuous adsorption and desorption, ensuring the continuity of the treatment. Attached Figure Description

[0035] Figure 1 A cross-sectional structural schematic diagram of the dual-channel carbon dioxide absorption device provided by this utility model;

[0036] Figure 2 for Figure 1 Partial structural diagram;

[0037] Figure 3 for Figure 1 The diagram shows the structure of the purging system in the dual-channel carbon dioxide absorption device.

[0038] Figure 4 for Figure 3 Enlarged view of section A;

[0039] Figure 5 for Figure 1 The diagram shows the structure of the branch pipeline in the dual-channel carbon dioxide absorption device.

[0040] The corresponding names of the attached figures are as follows: 1. Adsorption chamber; 2. Inlet pipe; 3. Exhaust pipe; 4. Collection pipe; 5. Carbon dioxide collector; 6. Gas concentration detection element; 7. Adsorption unit; 8. Container; 9. Isolation pipe; 10. Electric heating element; 11. Fixing structure; 12. Wire (electrically connected to electric heating element 10); 13. Gas delivery pump; 14. Suction pipe; 15. Main gas supply pipe; 16. Branch pipe; 17. Air outlet. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of the present invention include, but are not limited to, the following embodiments.

[0042] Example 1

[0043] like Figure 1-5 As shown, this utility model provides a dual-channel carbon dioxide absorption device, including two adsorption chambers 1 (the two adsorption chambers 1 can be defined as a first adsorption chamber 1A and a second adsorption chamber 1B).

[0044] The inlets of the two adsorption chambers 1 are connected to the flue gas source via inlet pipes 2. A first control valve V1 and a second control valve V2 are installed on the inlet pipes 2 to selectively introduce flue gas into either the first adsorption chamber 1A or the second adsorption chamber 1B. Exhaust pipes 3 are installed at the top of both adsorption chambers 1 to discharge the gas after carbon dioxide absorption. Collection pipes 4 are installed at the top of each of the two adsorption chambers 1 to collect the desorbed carbon dioxide and transport it to a carbon dioxide collector 5.

[0045] At least one adsorption unit 7 is provided in each of the two adsorption chambers 1. Each adsorption unit 7 includes a container 8 with a permeable structure and an adsorbent filled within the container 8. The adsorbent is preferably a mesoporous molecular sieve, such as SBA-15 type molecular sieve.

[0046] The adsorption unit 7 is equipped with a heating and regeneration mechanism. The heating and regeneration mechanism includes an isolation tube 9 disposed within the container 8, and an electric heating element 10 housed within the isolation tube 9. Multiple ventilation holes are provided on the wall of the isolation tube 9. The electric heating element 10 is connected to an external power source via a fixed structure 11 that penetrates the wall of the adsorption chamber.

[0047] The dual-channel carbon dioxide absorption device also includes a purging system to enhance the desorption process. The purging system includes a gas delivery pump 13. The inlet of the gas delivery pump 13 is connected to the internal space of the adsorption chamber in the desorption state via a suction pipe 14. Its outlet is connected to multiple branch pipes 16 via a main gas delivery pipe 15.

[0048] The number of branch pipes 16 corresponds to the number of isolation pipes 9, and the outlet end of each branch pipe 16 extends into the interior of a corresponding isolation pipe 9 and is located near the electric heating element 10. An air outlet 17 is provided on the wall of each branch pipe 16 to guide the airflow direction, so that the gas flowing out of the air outlet 17 can directly sweep the surface of the electric heating element 10, thereby efficiently and uniformly transferring heat to the entire adsorbent bed.

[0049] The dual-channel carbon dioxide absorption device also includes a control system. The control system includes:

[0050] Temperature detection element 18 (temperature sensor) is installed on collection pipe 4 which is connected to adsorption chamber and is used to detect the temperature of desorbed gas.

[0051] Gas concentration detection element 6 (carbon dioxide solubility detector) is installed inside the adsorption chamber to detect the carbon dioxide concentration inside the adsorption chamber.

[0052] A controller (not shown in the figure) is electrically connected to the temperature detection element 18, the gas concentration detection element 6, the gas delivery pump 13, and each control valve (V1, V2).

[0053] The controller executes the following control logic:

[0054] When an adsorption chamber enters the desorption state, its corresponding electric heating element 10 is activated.

[0055] When the temperature detected by the temperature detection element 18 reaches a first preset threshold, the gas delivery pump 13 is started, and circulating gas is delivered to each isolation pipe 9 through the branch pipeline 16.

[0056] When the concentration detected by the gas concentration detection element 6 drops to a second preset threshold, the gas delivery pump 13 and the electric heating element 10 are turned off.

[0057] In the above process, one of the control valves (V1, V2) is in the closed state, and the other is in the open state. The flue gas source enters the adsorption chamber, which is in a non-desorption state, for carbon dioxide adsorption. In this way, the continuous adsorption of carbon dioxide is achieved by switching the control valves (V1, V2).

[0058] The flue gas has undergone necessary pretreatment before entering the adsorption chamber, such as dust removal and cooling. This application does not consider other interfering factors.

[0059] Example 2

[0060] The main difference between this embodiment and Embodiment 1 is that the number of adsorption chambers is at least three (not shown in the figure, four adsorption chambers are defined as 1a, 1b, 1c, 1d).

[0061] Accordingly, intake line 2 is extended into an intake manifold with multiple branches, each branch having an independent control valve (control valve V1, V2, V3, V4).

[0062] The controller can control at least one of the multiple adsorption chambers to perform a desorption operation, while controlling the remaining adsorption chambers to perform an adsorption operation, thus realizing a "multiple adsorption and one desorption" or "multiple adsorption and multiple desorption" working mode.

Claims

1. A dual-channel carbon dioxide absorption device, characterized in that, include: At least two adsorption chambers (1); The air inlet pipe (2) is connected to the flue gas source and is connected to the inlet of each of the adsorption chambers (1). The air inlet pipe (2) is provided with a control valve for selectively introducing flue gas into each adsorption chamber (1). An exhaust pipe (3) is installed at the top of each of the adsorption chambers (1) to discharge the gas after carbon dioxide absorption; The collection pipeline (4) is connected to the outlet of each of the adsorption chambers (1) and is used to collect the desorbed carbon dioxide and transport it to the carbon dioxide collector (5); Each of the adsorption chambers (1) is provided with at least one adsorption unit (7), the adsorption unit (7) includes a container (8) with a breathable structure and an adsorbent filled in the container (8); the adsorption unit (7) is provided with a heating regeneration mechanism.

2. The dual-channel carbon dioxide absorption device according to claim 1, characterized in that, The heating regeneration mechanism includes: An isolation tube (9) is installed inside the container (8), and multiple ventilation holes are provided on the tube wall of the isolation tube (9); An electric heating element (10) is housed within the isolation tube (9); The electric heating element (10) is connected to an external power source through a fixed structure (11) that passes through the wall of the adsorption chamber.

3. The dual-channel carbon dioxide absorption device according to claim 2, characterized in that, It also includes a purging system, which comprises: The gas delivery pump (13) has its inlet connected to the internal space of the adsorption chamber in the desorption state via a suction pipe (14); The main gas delivery line (15) is connected to the outlet of the gas delivery pump (13); Multiple branch pipes (16) are provided, the number of which corresponds to the number of isolation pipes (9). The inlet of each branch pipe (16) is connected to the main gas supply pipe (15), and its outlet extends into the interior of a corresponding isolation pipe (9). Among them, an air outlet (17) is provided on the pipe wall of the branch pipe (16) to guide the airflow direction, so that the gas flowing out from the air outlet (17) can directly blow the surface of the electric heating element (10).

4. The dual-channel carbon dioxide absorption device according to claim 3, characterized in that, It also includes a control system, which includes: A temperature sensing element (18) is installed on the collection pipeline (4) to detect the temperature of the desorbed gas; A gas concentration detection element (6) is disposed inside the adsorption chamber and is used to detect the carbon dioxide concentration inside the adsorption chamber; The controller is electrically connected to the temperature detection element (18), the gas concentration detection element (6), the gas delivery pump (13), and each control valve.

5. The dual-channel carbon dioxide absorption device according to any one of claims 1-4, characterized in that, The adsorbent is a mesoporous molecular sieve.

6. The dual-channel carbon dioxide absorption device according to claim 5, characterized in that, The mesoporous molecular sieve is an SBA-15 type molecular sieve.

7. The dual-channel carbon dioxide absorption device according to claim 1, characterized in that, The number of adsorption chambers (1) is two, namely a first adsorption chamber (1A) and a second adsorption chamber (1B); the control valve includes a first control valve (V1) and a second control valve (V2) disposed on the air inlet pipe (2) and respectively corresponding to the first adsorption chamber (1A) and the second adsorption chamber (1B).

8. The dual-channel carbon dioxide absorption device according to claim 4, characterized in that, The number of adsorption chambers (1) is at least three; the air intake pipe (2) is extended into an air intake manifold with multiple branches, each branch having an independent control valve; the controller can control at least one of the multiple adsorption chambers to perform desorption operation, while controlling the remaining adsorption chambers to perform adsorption operation.

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