Carbon dioxide capturing device

Abstract

The utility model discloses a carbon dioxide capturing device which comprises an absorption tower and a parallel absorption tower with the same structure as the absorption tower, wherein a plurality of layers of rotating air inlet discs are arranged on the rotating shaft, and a spraying frame is arranged above each rotating air inlet disc; and electromagnetic valves are respectively arranged on the liquid supply pipe and the concentrated liquid conveying pipe. A rotating shaft driven by a driving mechanism is mounted in an absorption tower, a plurality of layers of rotary air inlet discs are mounted on the rotating shaft, and a spraying frame is mounted above each rotary air inlet disc; according to the rotary gas inlet disc, on one hand, the gas turbulence degree below the rotary gas inlet disc is improved through the rotary gas inlet disc so as to increase the gas flow speed and increase the contact area with absorption liquid, and on the other hand, a uniform absorption liquid water film can be conveniently formed on the top face of the rotary gas inlet disc through the centrifugal effect; therefore, the dissolving efficiency of carbon dioxide and absorption liquid is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of capturing greenhouse gases, in particular to a device for capturing carbon dioxide. Background Art

[0002] Carbon capture and storage technology has gradually become an important means to achieve substantial carbon emission reduction in the industrial field. It mainly includes CO2 absorption, CO2 separation and desorption, CO2 compression and liquefaction, storage and storage, etc. The main principle of CCS is to spray a certain amount of organic amine solution into the CO2 absorption tower. The carbon-containing organic amine rich liquid after absorption enters the regeneration tower after heat exchange, and then the rich liquid is heated by steam in the reboiler to desorb the high-concentration CO2 in the regeneration tower. The desorbed CO2 is passed through the gas-liquid separator together with water vapor to obtain high-purity CO2, which is compressed and liquefied before being stored or utilized.

[0003] The effective absorption efficiency of the absorption liquid and carbon dioxide in the CO2 absorption tower of the existing design is low. Utility Model Content

[0004] The utility model aims to provide a carbon dioxide capture device to solve the problem of low effective absorption efficiency of absorption liquid and carbon dioxide in a conventional CO2 absorption tower.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The utility model provides a carbon dioxide capture device, comprising an absorption tower and a parallel absorption tower having the same structure as the absorption tower;

[0007] A rotating shaft driven by a driving mechanism is arranged in the absorption tower, wherein multiple layers of rotating air inlet disks are arranged on the rotating shaft, and a spray rack is arranged above each of the rotating air inlet disks;

[0008] An air inlet pipe is arranged on the bottom side wall of the absorption tower; an exhaust valve is arranged on the top;

[0009] A liquid collecting hopper is provided at the bottom of the absorption tower, and the carbon dioxide reflux absorption liquid in the liquid collecting hopper is transported to each of the spray racks through a reflux pipe and a delivery pump;

[0010] The delivery pump is connected to the spray rack through a liquid supply pipe, a concentrated liquid delivery pipe is installed on the liquid supply pipe through a tee, and electromagnetic valves are respectively arranged on the liquid supply pipe and the concentrated liquid delivery pipe.

[0011] Furthermore, the driving mechanism includes a reducer and a motor installed on the top of the absorption tower.

[0012] Furthermore, the multi-layer rotating air intake disks arranged on the rotating shaft include, from top to bottom, an upper rotating air intake disk, a middle rotating air intake disk, and a lower rotating air intake disk;

[0013] The structures of the rotating air inlet discs are the same;

[0014] The upper rotating air inlet disc comprises a rotating disc coaxially fixed on the rotating shaft, a plurality of arc-shaped plates radially arranged at the bottom of the rotating disc, and a plurality of flow holes penetrating the rotating disc.

[0015] Furthermore, a plurality of annular limiting grooves adapted to the outer circumference of the rotating air inlet disk are provided on the side wall of the absorption tower;

[0016] Or / and, a plurality of balls are arranged between the annular limiting groove and the end side of the rotating air intake disk.

[0017] Furthermore, an intermediate detection tank for sampling is provided on the reflux pipe.

[0018] Compared with the prior art, the beneficial technical effects of the utility model are:

[0019] In the present application, a rotating shaft driven by a driving mechanism is installed in the absorption tower, wherein a plurality of rotating air inlet disks are installed on the rotating shaft, and a spray rack is installed above each of the rotating air inlet disks; wherein the rotating air inlet disks are utilized to increase the degree of gas turbulence below the rotating air inlet disks, so as to increase the gas flow rate and the contact area with the absorption liquid, and furthermore, the centrifugal effect can be utilized to form a uniform absorption liquid water film on the top surface of the rotating air inlet disks, thereby increasing the dissolution efficiency of carbon dioxide and the absorption liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the main structure of the carbon dioxide capture device of the utility model;

[0022] Figure 2 for Figure 1 The upward view of the rotating air intake disc;

[0023] Figure 3 for Figure 1 A partial enlarged schematic diagram;

[0024] Figure 4 for Figure 1 Schematic diagram of the middle spray rack viewed from above.

[0025] Description of reference numerals:

[0026] 1. Absorption tower; 11. Annular limit groove; 12. Liquid collecting hopper; 2. Parallel absorption tower; 3. Driving mechanism; 31. Rotating shaft; 4. Spray rack; 41. Liquid supply pipe; 42. Solenoid valve; 5. Delivery pump; 6. Intermediate detection tank; 61. Reflux pipe; 7. Intake fan; 71. Intake pipe; 8. Parallel intake pipe; 9. Upper rotary intake disc; 91. Middle rotary intake disc; 92. Lower rotary intake disc; 9a. Flow hole; 9b. Arc plate. DETAILED DESCRIPTION

[0027] This embodiment discloses a carbon dioxide capture device, comprising an absorption tower 1 and a parallel absorption tower 2 having the same structure as the absorption tower 1; wherein the absorption tower 1 and the parallel absorption tower 2 are connected to a gas source containing carbon dioxide to be processed through an air inlet pipe 71 and a parallel air inlet pipe 8, respectively;

[0028] A rotating shaft 31 driven by a driving mechanism 3 is installed in the absorption tower 1, wherein a plurality of rotating air inlet disks are installed on the rotating shaft 31, and a spray rack 4 is installed above each of the rotating air inlet disks; wherein the rotating air inlet disks are utilized to increase the degree of gas turbulence below the rotating air inlet disks on the one hand, and centrifugal action can also be utilized to form a uniform absorption liquid film on the top surface of the rotating air inlet disks, thereby increasing the dissolution efficiency of carbon dioxide and the absorption liquid.

[0029] like Figure 1 As shown, an air inlet pipe 71 is installed on the bottom side wall of the absorption tower 1, and an air inlet fan 7 or an induced draft fan is installed on the air inlet pipe 71; an exhaust valve is installed on the top to discharge the insoluble gas;

[0030] A liquid collecting hopper 12 is preset at the bottom of the absorption tower 1, wherein the carbon dioxide absorption can also be an organic amine rich liquid; the carbon dioxide reflux absorption liquid in the liquid collecting hopper 12 is transported to each of the spray racks 4 through a reflux pipe 61 and a delivery pump 5;

[0031] The delivery pump 5 is connected to the spray rack 4 through a liquid supply pipe 41, and a concentrated liquid delivery pipe is installed on the liquid supply pipe 41 through a tee, and solenoid valves 42 are installed on the liquid supply pipe 41 and the concentrated liquid delivery pipe respectively; an intermediate detection tank 6 for sampling is installed on the reflux pipe 61.

[0032] When in use, the absorption liquid in the intermediate detection tank 6 is detected. If the absorption liquid is detected to be a rich concentrated liquid that absorbs carbon dioxide, the air intake fan 7 and the solenoid valve 42 on the liquid supply pipe 41 are controlled to be closed, and the solenoid valve on the concentrated liquid delivery pipe is opened at the same time to deliver the concentrated liquid to the next stage of the treatment system.

[0033] In this embodiment, the driving mechanism 3 includes a reducer and a motor installed on the top of the absorption tower 1.

[0034] Specifically, Figure 1 As shown, the multi-layer rotating air intake disk installed on the rotating shaft 31 includes, from top to bottom, an upper rotating air intake disk 9, a middle rotating air intake disk 91, and a lower rotating air intake disk 92;

[0035] The structures of the rotating air inlet discs are the same;

[0036] The upper rotating air inlet disc 9 comprises a rotating disc coaxially fixed on the rotating shaft 31, a plurality of arc-shaped plates 9b radially mounted on the bottom of the rotating disc, and a plurality of flow holes 9a penetrating the rotating disc;

[0037] The size of the flow hole 9a is designed according to the air flow rate of the intake air to avoid excessive wind resistance.

[0038] A plurality of annular limiting grooves 11 adapted to the outer circumference of the rotating air inlet disk are provided on the side wall of the absorption tower 1; specifically, Figure 3 As shown, a plurality of balls are installed between the annular limiting groove 11 and the end side of the rotating air intake disk to reduce the rotational friction.

[0039] The above embodiments are only descriptions of the preferred methods of the invention, and are not intended to limit the scope of the invention. Without departing from the design spirit of the invention, various modifications and improvements made to the technical solution of the invention by ordinary technicians in this field should fall within the protection scope of the claims of the invention.

Claims

1. A carbon dioxide capture device, characterized in that: It comprises an absorption tower (1) and a parallel absorption tower (2) having the same structure as the absorption tower (1); A rotating shaft (31) driven by a driving mechanism (3) is arranged in the absorption tower (1), wherein a plurality of rotating air inlet disks are arranged on the rotating shaft (31), and a spray rack (4) is arranged above each rotating air inlet disk; An air inlet pipe (71) is arranged on the bottom side wall of the absorption tower (1), and an exhaust valve is arranged on the top thereof; A liquid collecting hopper (12) is provided at the bottom of the absorption tower (1), and the carbon dioxide reflux absorption liquid in the liquid collecting hopper (12) is transported to each of the spray racks (4) through a reflux pipe (61) and a transport pump (5); The delivery pump (5) is connected to the spray rack (4) via a liquid supply pipe (41), a concentrated liquid delivery pipe is installed on the liquid supply pipe (41) via a tee, and electromagnetic valves (42) are respectively provided on the liquid supply pipe (41) and the concentrated liquid delivery pipe.

2. The carbon dioxide capture device according to claim 1, characterized in that: The driving mechanism (3) comprises a reducer and a motor installed on the top of the absorption tower (1).

3. The carbon dioxide capture device according to claim 1, characterized in that: The multiple layers of rotating air intake disks arranged on the rotating shaft (31) include, from top to bottom, an upper rotating air intake disk (9), a middle rotating air intake disk (91), and a lower rotating air intake disk (92); The structures of the rotating air inlet discs are the same; The upper rotating air inlet disc (9) comprises a rotating disc coaxially fixed on the rotating shaft (31), a plurality of arc-shaped plates (9b) radially arranged at the bottom of the rotating disc, and a plurality of flow holes (9a) penetrating the rotating disc.

4. The carbon dioxide capture device according to claim 3, characterized in that: A plurality of annular limiting grooves (11) adapted to the outer circumference of the rotating air inlet disk are provided on the side wall of the absorption tower (1); Or / and, a plurality of balls are arranged between the annular limiting groove (11) and the end side of the rotating air intake disc.

5. The carbon dioxide capture device according to claim 1, characterized in that: An intermediate detection tank (6) for sampling is arranged on the reflux pipe (61).

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