Device for capturing carbon dioxide by using sodium hydroxide and sodium carbonate

Abstract

The utility model relates to the technical field of carbon dioxide capture, in particular to a device for capturing carbon dioxide by using sodium hydroxide and sodium carbonate, which comprises a spray tower, a power box, a gas outlet pipe, a gas inlet mechanism and a spray mechanism, the gas inlet mechanism is arranged on the inner bottom wall of the spray tower and used for blowing flue gas into the spray tower, and the spray mechanism is arranged in the spray tower and used for spraying a sodium hydroxide solution to the flue gas entering the spray tower. And meanwhile, the spraying effect of the sodium hydroxide solution is improved through the spraying mechanism, so that the problem of relatively low spraying efficiency in the sodium hydroxide spraying process in the related technology is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon dioxide capture, in particular to a device for capturing carbon dioxide by using sodium hydroxide and sodium carbonate. Background Art

[0002] Flue gas is a mixture of gas and soot, which is the main cause of polluting the atmosphere in residential areas. Flue gas containing carbon dioxide belongs to renewable resources. In many industrial fields, it is necessary to recycle natural carbon dioxide or carbon dioxide in various furnace gases, tail gases, and by-products. Carbon capture is the process of capturing carbon dioxide in industrial production by various means and then storing or utilizing it.

[0003] In the prior art, generally a primary absorption system and a secondary absorption crystallization system are used to capture carbon dioxide. In the primary absorption system, an operator passes flue gas into a sodium hydroxide spray tower, and sodium hydroxide is used as an absorbent to react with carbon dioxide. The reaction product, sodium carbonate solution, enters the sodium carbonate absorption tower of the secondary absorption crystallization system. At the same time, the flue gas is also passed into the sodium carbonate absorption tower. Carbon dioxide in the flue gas contacts and reacts with the sodium carbonate absorption liquid to generate sodium bicarbonate, which is crystallized and transported out, and the clean flue gas is discharged. The reacted sodium carbonate solution is recycled through a solution pump and a solution storage tank.

[0004] However, during the spraying process of the sodium hydroxide solution on the flue gas in the sodium hydroxide spray tower, usually only a plurality of spray heads are installed at the top of the spray tower to spray the flue gas, and the spraying effect is low. It is easy to have the problem that carbon dioxide in the flue gas is discharged from the spray tower without reacting with the sodium hydroxide solution. Summary of the Utility Model

[0005] The utility model provides a device for capturing carbon dioxide by using sodium hydroxide and sodium carbonate, which solves the problem of low spraying efficiency during the sodium hydroxide spraying process in the related art.

[0006] The technical solution of the utility model is as follows: A device for capturing carbon dioxide by using sodium hydroxide and sodium carbonate includes a spray tower, a power box, an air outlet pipe, an air inlet mechanism, and a spraying mechanism;

[0007] The power box is fixedly arranged on the spray tower;

[0008] The air outlet pipe is communicated and arranged on the spray tower;

[0009] The air inlet mechanism is arranged on the inner bottom wall of the spray tower for blowing flue gas into the spray tower;

[0010] The spraying mechanism is arranged in the spray tower for spraying sodium hydroxide solution on the flue gas entering the spray tower.

[0011] Preferably, the intake mechanism includes:

[0012] A first intake pipe rotatably arranged on the inner bottom wall of the spray tower;

[0013] A second intake pipe, with multiple second intake pipes being connected and fixedly arranged on the first intake pipe;

[0014] Intake nozzles, with multiple intake nozzles being connected to each second intake pipe;

[0015] An intake hose fixedly arranged on the spray tower and communicating with the first intake pipe;

[0016] A rotating mechanism arranged inside the spray tower for controlling the rotation of the first intake pipe.

[0017] Further, the rotating mechanism includes:

[0018] A first annular rack fixedly arranged on the first intake pipe;

[0019] A first gear rotatably arranged on the inner bottom wall of the spray tower and meshing with the first annular rack;

[0020] A first motor fixedly arranged on the spray tower, with the output end of the first motor fixedly connected to the first gear.

[0021] Still further, the spraying mechanism includes:

[0022] A support opening formed between the power box and the spray tower;

[0023] A support pipe rotatably arranged inside the support opening;

[0024] A support disk rotatably arranged inside the spray tower, with the support pipe fixedly connected to the support disk;

[0025] Ventilation openings, with multiple ventilation openings formed on the support disk;

[0026] Support shells, with multiple support shells fixedly arranged on the support disk and in contact with the side wall of the spray tower;

[0027] A first cavity formed inside the support disk and communicating with the support pipe;

[0028] Wherein, a liquid inlet channel is arranged between the first cavity and the support shell;

[0029] The first stirring tube, a plurality of the first stirring tubes are provided, and the plurality of the first stirring tubes are rotatably arranged on the support disc. One end of the first stirring tube away from the support disc is sealed, and the first stirring tube extends into the first cavity;

[0030] The second stirring tube, a plurality of the second stirring tubes are communicatively arranged on each of the first stirring tubes, and one end of the second stirring tube away from the first stirring tube is sealed;

[0031] The liquid inlet nozzle, a plurality of the liquid inlet nozzles are communicatively arranged on the second stirring tube and the support housing;

[0032] The driving mechanism, which is arranged in the power box and is used to control the rotation of the first stirring tube and the support tube.

[0033] Furthermore, the driving mechanism includes:

[0034] The driving tube, which is rotatably arranged on the inner top wall of the power box, and the driving tube extends into the first cavity;

[0035] The second gear, which is fixedly arranged on the side wall of the driving tube;

[0036] The third gear, which is fixedly arranged on the side wall of the first stirring tube;

[0037] Wherein, the second gear meshes with the third gear;

[0038] The liquid inlet pipe, which is fixedly arranged on the power box, and the liquid inlet pipe extends into the driving tube;

[0039] The power input mechanism, which is arranged in the power box and is used to provide power for the rotation of the support tube and the driving tube.

[0040] On the basis of the above solution, the power input mechanism includes:

[0041] The first bevel gear, which is fixedly arranged on the side wall of the support tube;

[0042] The second bevel gear, which is fixedly arranged on the driving tube;

[0043] The third bevel gear, which is rotatably arranged in the power box, and the third bevel gear meshes with the first bevel gear and the second bevel gear respectively;

[0044] A second motor, which is fixedly arranged on the power box, and the output end of the second motor is fixedly connected to the third bevel gear.

[0045] The working principle and beneficial effects of the present utility model are as follows:

[0046] 1. In the present utility model, through the setting of the air intake mechanism, the operator can introduce flue gas into the first intake pipe and the second intake pipe through the air intake hose, and at the same time, introduce flue gas into the spray tower through the air intake nozzle. Meanwhile, the operation of the first motor can drive the first gear to rotate, and at the same time, through the meshing of the first gear and the first annular rack, drive the second intake pipe to move around the first intake pipe, thereby driving the air intake nozzle to move, so that the flue gas can be evenly introduced into the spray tower, thus facilitating the improvement of the spraying effect.

[0047] 2. In the present utility model, through the setting of the spraying mechanism, sodium hydroxide solution can be introduced into the first cavity through the liquid inlet pipe, and then the flue gas can be sprayed through the liquid inlet nozzle.

[0048] 3. In the present utility model, through the setting of the driving mechanism, the operation of the second motor can drive the third bevel gear to rotate, and at the same time, through the meshing of the third bevel gear with the first bevel gear and the second bevel gear respectively, drive the support pipe and the driving pipe to rotate. The rotation of the support pipe and the driving pipe can respectively drive the support disc and the first stirring pipe to rotate, thus facilitating the uniform and comprehensive spraying of the flue gas through the liquid inlet nozzle.

[0049] 4. In the present utility model, through the setting of the driving mechanism, the rotation of the driving pipe can drive the second gear to rotate, and then through the meshing of the second gear and the third gear, drive the first stirring pipe to rotate, so that the second stirring pipe moves around the first stirring pipe, thus facilitating the agitation of the flue gas through the second stirring pipe and the first stirring pipe, and further improving the spraying efficiency of the flue gas.

[0050] 5. In the present utility model, through the setting of the spray tower, the power box, the outlet pipe, the air intake mechanism and the spraying mechanism, it is convenient to improve the uniformity of the flue gas entering the spray tower through the air intake mechanism, and at the same time, improve the spraying effect of the sodium hydroxide solution through the spraying mechanism, thus solving the problem of low spraying efficiency in the related technology during the spraying of sodium hydroxide, and avoiding the problem that carbon dioxide in the flue gas is discharged from the spray tower without reacting with the sodium hydroxide solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The following further elaborates on the present utility model in detail in conjunction with the drawings and specific embodiments.

[0052] Figure 1 It is a schematic structural diagram of the present utility model;

[0053] Figure 2 This is a schematic cross-sectional structure diagram of the spray tower of the present utility model;

[0054] Figure 3 This is a schematic structure diagram of the spray mechanism of the present utility model;

[0055] Figure 4 This is a schematic cross-sectional structure diagram of the spray mechanism of the present utility model.

[0056] In the figure: 1. Spray tower; 2. Power box; 3. Exhaust pipe; 4. First intake pipe; 5. Second intake pipe; 6. Intake spray head; 7. Intake hose; 8. First annular rack; 9. First gear; 10. First motor; 11. Support pipe; 12. Support disk; 13. Vent hole; 14. Support housing; 15. First cavity; 16. First stirring pipe; 17. Second stirring pipe; 18. Drive pipe; 19. Second gear; 20. Third gear; 21. Liquid inlet pipe; 22. First bevel gear; 23. Second bevel gear; 24. Third bevel gear; 25. Second motor. Specific embodiments

[0057] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model.

[0058] As Figures 1 to 4 shown, this embodiment proposes a device for capturing carbon dioxide using sodium hydroxide and sodium carbonate, including a spray tower 1, a power box 2, an exhaust pipe 3, an intake mechanism, and a spray mechanism. The power box 2 is fixedly arranged on the spray tower 1, the exhaust pipe 3 is communicatively arranged on the spray tower 1, the intake mechanism is arranged on the inner bottom wall of the spray tower 1 for blowing flue gas into the spray tower 1, and the spray mechanism is arranged in the spray tower 1 for spraying sodium hydroxide solution on the flue gas entering the spray tower 1.

[0059] Among them, the intake mechanism includes a first intake pipe 4, a second intake pipe 5, an intake nozzle 6, an intake hose 7, and a rotating mechanism. The first intake pipe 4 is rotatably arranged on the inner bottom wall of the spray tower 1. The second intake pipes 5 are provided in multiple numbers. The multiple second intake pipes 5 are communicated and fixedly arranged on the first intake pipe 4. A plurality of intake nozzles 6 are communicated and arranged on each second intake pipe 5. The intake hose 7 is fixedly arranged on the spray tower 1. The intake hose 7 is communicated with the first intake pipe 4. The rotating mechanism is arranged in the spray tower 1 and is used to control the rotation of the first intake pipe 4. The rotating mechanism includes a first annular rack 8, a first gear 9, and a first motor 10. The first annular rack 8 is fixedly arranged on the first intake pipe 4. The first gear 9 is rotatably arranged on the inner bottom wall of the spray tower 1. The first gear 9 meshes with the first annular rack 8. The first motor 10 is fixedly arranged on the spray tower 1. The output end of the first motor 10 is fixedly connected to the first gear 9.

[0060] Specifically, an operator can introduce flue gas into the first intake pipe 4 and the second intake pipes 5 through the intake hose 7, and at the same time, introduce flue gas into the spray tower 1 through the intake nozzles 6. Meanwhile, the operation of the first motor 10 can drive the first gear 9 to rotate, and at the same time, drive the first intake pipe 4 to rotate through the meshing of the first gear 9 and the first annular rack 8, so that the second intake pipes 5 move around the first intake pipe 4, and then drive the intake nozzles 6 to move, so that the flue gas can be evenly introduced into the spray tower 1, and thus it is convenient to improve the spraying effect.

[0061] Among them, the spraying mechanism includes a support port, a support pipe 11, a support disk 12, a ventilation port 13, a support housing 14, a first cavity 15, a first stirring pipe 16, a second stirring pipe 17, a liquid inlet nozzle, and a driving mechanism. The support port is opened between the power box 2 and the spray tower 1. The support pipe 11 is rotatably arranged in the support port. The support disk 12 is rotatably arranged in the spray tower 1. The support pipe 11 is fixedly connected to the support disk 12. A plurality of ventilation ports 13 are opened on the support disk 12. A plurality of support housings 14 are fixedly arranged on the support disk 12. The support housing 14 is in contact with the side wall of the spray tower 1. The first cavity 15 is opened in the support disk 12. The first cavity 15 is communicated with the support pipe 11. Among them, a liquid inlet channel is arranged between the first cavity 15 and the support housing 14. The first stirring pipes 16 are provided in multiple numbers. The multiple first stirring pipes 16 are rotatably arranged on the support disk 12. One end of the first stirring pipe 16 away from the support disk 12 is sealed. The first stirring pipe 16 extends into the first cavity 15. A plurality of second stirring pipes 17 are communicated and arranged on each first stirring pipe 16. One end of the second stirring pipe 17 away from the first stirring pipe 16 is sealed. A plurality of liquid inlet nozzles are communicated and arranged on the second stirring pipe 17 and the support housing 14. The driving mechanism is arranged in the power box 2 and is used to control the rotation of the first stirring pipe 16 and the support pipe 11.

[0062] Specifically, the operator feeds sodium hydroxide solution into the first cavity 15, so that the sodium hydroxide solution can be fed into the support housing 14 and the second stirring tube 17 through the liquid inlet channel and the first stirring tube 16 respectively, and then the flue gas is sprayed through the liquid inlet nozzle.

[0063] Wherein, the driving mechanism includes a driving tube 18, a second gear 19, a third gear 20, a liquid inlet tube 21 and a power input mechanism. The driving tube 18 is rotatably arranged on the inner top wall of the power box 2. The driving tube 18 extends into the first cavity 15. The second gear 19 is fixedly arranged on the side wall of the driving tube 18. The third gear 20 is fixedly arranged on the side wall of the first stirring tube 16. Wherein, the second gear 19 meshes with the third gear 20. The liquid inlet tube 21 is fixedly arranged on the power box 2. The liquid inlet tube 21 extends into the driving tube 18. The power input mechanism is arranged in the power box 2 and is used to provide power for the rotation of the support tube 11 and the driving tube 18. The power input mechanism includes a first bevel gear 22, a second bevel gear 23, a third bevel gear 24 and a second motor 25. The first bevel gear 22 is fixedly arranged on the side wall of the support tube 11. The second bevel gear 23 is fixedly arranged on the driving tube 18. The third bevel gear 24 is rotatably arranged in the power box 2. The third bevel gear 24 meshes with the first bevel gear 22 and the second bevel gear 23 respectively. The second motor 25 is fixedly arranged on the power box 2. The output end of the second motor 25 is fixedly connected to the third bevel gear 24.

[0064] Specifically, the operator controls the second motor 25 to work. The work of the second motor 25 can drive the third bevel gear 24 to rotate. At the same time, through the meshing of the third bevel gear 24 with the first bevel gear 22 and the second bevel gear 23 respectively, the support tube 11 and the driving tube 18 are driven to rotate. The rotation of the support tube 11 can drive the support disc 12 to rotate. At the same time, the rotation of the driving tube 18 can drive the second gear 19 to rotate. Then, through the meshing of the second gear 19 with the third gear 20, the first stirring tube 16 is driven to rotate, so that the second stirring tube 17 moves around the first stirring tube 16, which is convenient for stirring the flue gas through the second stirring tube 17 and the first stirring tube 16. During the rotation of the support disc 12 and the movement of the second stirring tube 17, the liquid inlet nozzle can be driven to move respectively, so as to facilitate the uniform and comprehensive spraying of the flue gas through the liquid inlet nozzle.

[0065] In this embodiment, during use, the operator can introduce flue gas into the first intake pipe 4 and the second intake pipe 5 through the intake hose 7, and at the same time introduce flue gas into the spray tower 1 through the intake nozzle 6. Meanwhile, the operation of the first motor 10 can drive the first gear 9 to rotate, and at the same time drive the first intake pipe 4 to rotate through the engagement of the first gear 9 and the first annular rack 8, so that the second intake pipe 5 moves around the first intake pipe 4, and then drives the intake nozzle 6 to move, so that the flue gas can be evenly introduced into the spray tower 1. At the same time, the operator introduces sodium hydroxide solution into the first cavity 15 through the liquid inlet pipe 21, so that the sodium hydroxide solution can be introduced into the support housing 14 and the second stirring pipe 17 through the liquid inlet channel and the first stirring pipe 16 respectively, and then the flue gas is sprayed through the liquid inlet nozzle. During the spraying process, the operator controls the second motor 25 to work. The operation of the second motor 25 can drive the third bevel gear 24 to rotate, and at the same time drive the support pipe 11 and the drive pipe 18 to rotate through the engagement of the third bevel gear 24 with the first bevel gear 22 and the second bevel gear 23 respectively. The rotation of the support pipe 11 can drive the support disk 12 to rotate, and at the same time the rotation of the drive pipe 18 can drive the second gear 19 to rotate, and then drive the first stirring pipe 16 to rotate through the engagement of the second gear 19 and the third gear 20, so that the second stirring pipe 17 moves around the first stirring pipe 16, so as to facilitate the agitation of the flue gas through the second stirring pipe 17 and the first stirring pipe 16. During the rotation of the support disk 12 and the movement of the second stirring pipe 17, the liquid inlet nozzle can be driven to move respectively, so as to facilitate the uniform and comprehensive spraying of the flue gas through the liquid inlet nozzle.

[0066] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for capturing carbon dioxide using sodium hydroxide and sodium carbonate, characterized in that: include: Spray tower (1); A power box (2), the power box (2) being fixedly arranged on the spray tower (1); An air outlet pipe (3), the air outlet pipe (3) being arranged in communication with the spray tower (1); An air intake mechanism, the air intake mechanism being arranged on the inner bottom wall of the spray tower (1) and being used for blowing smoke into the spray tower (1); A spray mechanism, the spray mechanism is arranged in the spray tower (1) and is used to spray sodium hydroxide solution on the flue gas entering the spray tower (1), the spray mechanism comprising: A support opening, the support opening being provided between the power box (2) and the spray tower (1); A support tube (11), the support tube (11) being rotatably disposed in the support opening; A support plate (12), the support plate (12) being rotatably disposed in the spray tower (1), and the support pipe (11) being fixedly connected to the support plate (12); A vent (13), wherein the support plate (12) is provided with a plurality of vents (13); A support shell (14), wherein a plurality of the support shells (14) are fixedly arranged on the support plate (12), and the support shells (14) are in contact with a side wall of the spray tower (1); a first cavity (15), the first cavity (15) being disposed in the support plate (12), the first cavity (15) being in communication with the support tube (11); Wherein, a liquid inlet channel is provided between the first cavity (15) and the supporting shell (14); a first stirring tube (16), wherein the first stirring tube (16) is provided in plurality, the plurality of first stirring tubes (16) being rotatably disposed on the support plate (12), one end of the first stirring tube (16) away from the support plate (12) being sealed, and the first stirring tube (16) extending into the first cavity (15); a second stirring tube (17), wherein each of the first stirring tubes (16) is connected to a plurality of the second stirring tubes (17), and one end of the second stirring tube (17) away from the first stirring tube (16) is sealed; Liquid inlet nozzles, a plurality of liquid inlet nozzles being connected and arranged on the second stirring tube (17) and the supporting shell (14); A driving mechanism, the driving mechanism is arranged in the power box (2) and is used to control the first stirring tube (16) and the supporting tube (11) to rotate.

2. A device for capturing carbon dioxide using sodium hydroxide and sodium carbonate according to claim 1, characterized in that: The air intake mechanism comprises: a first air inlet pipe (4), the first air inlet pipe (4) being rotatably arranged on the inner bottom wall of the spray tower (1); A second air intake pipe (5), wherein the second air intake pipe (5) is provided in plurality, and the plurality of second air intake pipes (5) are connected to and fixedly arranged on the first air intake pipe (4); An air intake nozzle (6), each of the second air intake pipes (5) being connected and provided with a plurality of the air intake nozzles (6); An air intake hose (7), the air intake hose (7) being fixedly arranged on the spray tower (1), the air intake hose (7) being in communication with the first air intake pipe (4); A rotating mechanism, the rotating mechanism is arranged in the spray tower (1) and is used to control the first air inlet pipe (4) to rotate.

3. A device for capturing carbon dioxide using sodium hydroxide and sodium carbonate according to claim 2, characterized in that: The rotating mechanism comprises: a first annular rack (8), the first annular rack (8) being fixedly arranged on the first air intake pipe (4); a first gear (9), the first gear (9) being rotatably disposed on the inner bottom wall of the spray tower (1), the first gear (9) being meshed with the first annular rack (8); A first motor (10), wherein the first motor (10) is fixedly arranged on the spray tower (1), and an output end of the first motor (10) is fixedly connected to the first gear (9).

4. A device for capturing carbon dioxide using sodium hydroxide and sodium carbonate according to claim 3, characterized in that: The driving mechanism comprises: a driving tube (18), the driving tube (18) being rotatably disposed on the inner top wall of the power box (2), the driving tube (18) extending into the first cavity (15); a second gear (19), the second gear (19) being fixedly arranged on a side wall of the driving tube (18); a third gear (20), the third gear (20) being fixedly arranged on a side wall of the first stirring tube (16); Wherein, the second gear (19) is meshed with the third gear (20); a liquid inlet pipe (21), the liquid inlet pipe (21) being fixedly arranged on the power box (2), and the liquid inlet pipe (21) extending into the driving pipe (18); A power input mechanism is arranged in the power box (2) and is used to provide power for the rotation of the support tube (11) and the drive tube (18).

5. A device for capturing carbon dioxide using sodium hydroxide and sodium carbonate according to claim 4, characterized in that: The power input mechanism comprises: a first bevel gear (22), the first bevel gear (22) being fixedly arranged on a side wall of the support tube (11); a second bevel gear (23), the second bevel gear (23) being fixedly disposed on the driving tube (18); a third bevel gear (24), the third bevel gear (24) being rotatably disposed in the power box (2), the third bevel gear (24) being meshed with the first bevel gear (22) and the second bevel gear (23) respectively; A second motor (25), the second motor (25) is fixedly arranged on the power box (2), and an output end of the second motor (25) is fixedly connected to the third bevel gear (24).

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