Purifying low-temperature methanol washing carbon dioxide trapping device
通过在低温甲醇洗工艺中引入多级净化室、搅动和喷淋机构,解决了甲醇液利用率低的问题,实现了高效的二氧化碳捕集效果。
Patent Information
- Application Number
- CN202422335488.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-25
AI Technical Summary
In the existing low-temperature methanol washing process, the utilization rate of methanol liquid during the preliminary purification process is low, resulting in poor carbon dioxide removal effect, and there are still a large amount of carbon dioxide residues in the subsequent purification process.
The multi-stage purification chamber design is adopted, combining agitation and spraying mechanism to improve the mixing efficiency of methanol liquid by agitating the fan blades, and the spraying mechanism is used to increase the contact area and time between methanol liquid and acid gas. The liquid replenishment mechanism is combined with the liquid replenishing mechanism to continuously supplement the low-temperature methanol liquid to enhance the absorption effect.
It significantly improves the carbon dioxide absorption efficiency of methanol liquid, reduces the carbon dioxide content in acid gas, and improves the carbon dioxide capture capacity.
Smart Images
Figure CN223082537U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a carbon dioxide capture device, in particular to a purification low-temperature methanol washing carbon dioxide capture device. Background Art
[0002] Low-temperature methanol washing is a process for removing acidic gases, especially carbon dioxide and hydrogen sulfide, from a gas mixture. The low-temperature methanol washing process utilizes the characteristic that methanol has a great solubility for acidic gases at low temperatures, and removes the acidic gases in the raw gas by physical absorption.
[0003] This process usually includes one or more absorption towers and stripping towers. In the absorption tower, the acidic gases are absorbed by methanol, and then in the stripping tower, the methanol-rich liquid releases the absorbed acidic gases by reducing pressure and heating, realizing the regeneration and recycling of methanol.
[0004] The common absorption towers of low-temperature methanol washing on the market purify and absorb carbon dioxide through multi-stage purification (primary purification, secondary purification, tertiary purification, etc.). The primary purification purifies the acidic gases with methanol liquid having a certain head height, and this methanol liquid with a head height is static. After the acidic gases enter the methanol liquid from the air inlet, their diffusion ability in the methanol liquid is limited, resulting in that not all of the methanol liquid in the primary purification process can be utilized, thus making the effect of the primary purification poor and easily leading to a large amount of carbon dioxide still existing in the acidic gases after the subsequent purification process. Content of the Utility Model
[0005] The purpose of the utility model is to provide a purification low-temperature methanol washing carbon dioxide capture device to solve the problems put forward in the above background art.
[0006] To achieve the above purpose, the utility model provides the following technical solutions:
[0007] A purification low-temperature methanol washing carbon dioxide capture device includes an absorption tower, an air inlet fixedly installed at the bottom side of the absorption tower, and an air outlet fixedly installed above the absorption tower; a liquid discharge port is fixedly installed at the bottom of the absorption tower;
[0008] A plurality of filter plates are fixedly installed in the absorption tower, and the filter plates divide the inner side of the absorption tower into a primary purification chamber, a plurality of secondary purification chambers and a deep purification chamber according to the gas flow direction;
[0009] A stirring mechanism is arranged in the primary purification chamber; a fan blade is connected to the stirring mechanism, and the stirring mechanism can drive the fan blade to rotate;
[0010] The secondary purification chambers are filled with fillers;
[0011] The deep purification chamber is provided with a spraying mechanism connected to the stirring mechanism. A spray head is connected to the spraying mechanism, and the spraying mechanism can drive the spray head to rotate;
[0012] The absorption tower is also provided with a liquid supplementing mechanism for supplementing methanol.
[0013] For the purification low-temperature methanol wash carbon dioxide capture device as described above: the liquid supplementing mechanism includes a condensation box; a water pump is fixedly installed on the condensation box. The condensation box is communicated with the water inlet end of the water pump through a liquid inlet pipe, and the water outlet end of the water pump is communicated with the absorption tower through a liquid outlet pipe.
[0014] For the purification low-temperature methanol wash carbon dioxide capture device as described above: the stirring mechanism includes a rotating shaft rotatably installed on the absorption tower. The rotating shaft is rotatably connected to the filter plate, and the rotating shaft penetrates through the primary purification chamber, the secondary purification chamber and the deep purification chamber; a motor is fixedly installed at the bottom of the absorption tower, and the output end of the motor is fixedly connected to the rotating shaft; the fan blades are fixedly installed on the rotating shaft.
[0015] For the purification low-temperature methanol wash carbon dioxide capture device as described above: the filler has the characteristic of multi-voids that can slow down the flow rate of the gas and the liquid.
[0016] For the purification low-temperature methanol wash carbon dioxide capture device as described above: the spraying mechanism includes a base fixedly installed at one end of the rotating shaft away from the motor; a liquid spraying pipe is fixedly installed on the base; the spray head is fixedly installed on the liquid spraying pipe; the base is rotatably connected to the liquid outlet pipe.
[0017] For the purification low-temperature methanol wash carbon dioxide capture device as described above: the spray head is bent and is inclined in a direction away from the rotating shaft.
[0018] For the purification low-temperature methanol wash carbon dioxide capture device as described above: a liquid inlet for supplementing methanol is fixedly installed on the condensation box.
[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows: the stirring mechanism drives the fan blades to rotate to stir the methanol liquid in the primary purification chamber, thereby avoiding the situation that only the methanol liquid at the air inlet absorbs carbon dioxide and improving the absorption efficiency of the methanol liquid; the spraying mechanism sprays the methanol liquid from the spray head in a rotating spraying form, increasing the contact area between the methanol liquid and the acidic gas and the absorption time of the methanol liquid for absorbing carbon dioxide, thereby improving the absorption efficiency of the methanol liquid; through multiple purifications of the methanol liquid in the primary purification chamber, the secondary purification chamber and the deep purification chamber, the carbon dioxide content in the acidic gas can be effectively reduced, thereby improving the ability of the methanol liquid to capture carbon dioxide. Description of the Drawings
[0020] Figure 1 It is a schematic structural diagram of a carbon dioxide capture device for purifying low-temperature methanol wash.
[0021] Figure 2 It is a schematic structural diagram of the absorption tower in the carbon dioxide capture device for purifying low-temperature methanol wash.
[0022] Figure 3 It is Figure 2 a schematic structural diagram from a sectional perspective of
[0023] Figure 4 It is a schematic structural diagram of the spraying mechanism in the carbon dioxide capture device for purifying low-temperature methanol wash.
[0024] Figure 5 It is a schematic structural diagram of the stirring mechanism in the carbon dioxide capture device for purifying low-temperature methanol wash.
[0025] Figure 6 It is a schematic structural diagram of the liquid outlet pipe and the base in the carbon dioxide capture device for purifying low-temperature methanol wash.
[0026] Figure 7 It is Figure 6 a schematic structural diagram at position A in
[0027] In the figure: 1. Absorption tower; 101. Air inlet; 102. Drainage port; 103. Filter plate; 104. Air outlet; 105. Primary purification chamber; 106. Secondary purification chamber; 107. Deep purification chamber;
[0028] 2. Motor;
[0029] 3. Rotating shaft;
[0030] 4. Fan blade;
[0031] 5. Base;
[0032] 6. Liquid spraying pipe; 601. Sprinkler head;
[0033] 7. Condensation box; 701. Liquid inlet;
[0034] 8. Water pump;
[0035] 9. Liquid outlet pipe;
[0036] 10. Liquid inlet pipe;
[0037] 11. Filler. Specific implementation mode
[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.
[0039] Please refer to Figures 1 to 7 , as an embodiment of the present utility model, the purification low-temperature methanol wash carbon dioxide capture device includes an absorption tower 1, an air inlet 101 fixedly installed at the bottom side of the absorption tower 1, and an air outlet 104 fixedly installed above the absorption tower 1; a liquid discharge port 102 is fixedly installed at the bottom of the absorption tower 1;
[0040] A plurality of filter plates 103 are fixedly installed in the absorption tower 1, and the filter plates 103 divide the inner side of the absorption tower 1 into a primary purification chamber 105, a plurality of secondary purification chambers 106, and a deep purification chamber 107 according to the gas flow direction;
[0041] A stirring mechanism is arranged in the primary purification chamber 105; a fan blade 4 is connected to the stirring mechanism, and the stirring mechanism can drive the fan blade 4 to rotate;
[0042] The secondary purification chamber 106 is filled with a filler 11;
[0043] A spraying mechanism connected to the stirring mechanism is arranged in the deep purification chamber 107, a spray head 601 is connected to the spraying mechanism, and the spraying mechanism can drive the spray head 601 to rotate;
[0044] A liquid supplementing mechanism for supplementing methanol is also provided on the absorption tower 1.
[0045] In this embodiment, the acidic gas rich in a large amount of carbon dioxide enters the absorption tower 1 through the air inlet 101 and gradually rises along the inner side of the absorption tower 1. The primary purification chamber 105 is filled with methanol liquid that submerges the air inlet 101.
[0046] When the acidic gas is in the primary purification chamber 105, the methanol liquid in the primary purification chamber 105 starts to absorb carbon dioxide in the acidic gas. At the same time, the stirring mechanism drives the fan blade 4 to rotate to stir the methanol liquid in the primary purification chamber 105, thereby improving the absorption efficiency of the methanol liquid.
[0047] After that, the acidic gas that has been preliminarily purified by the primary purification chamber 105 enters the secondary purification chamber 106. The filler 11 in the secondary purification chamber 106 can slow down the gas flow rate, thereby increasing the time for the methanol liquid on the filler 11 to absorb carbon dioxide, so as to improve the absorption efficiency of the methanol liquid.
[0048] The acidic gas that has been secondarily purified by the secondary purification chamber 106 enters the deep purification chamber 107. The spraying mechanism in the deep purification chamber 107 sprays a large amount of methanol liquid through the spray head 601, and the stirring mechanism drives the spray head 601 to rotate through the spraying mechanism, thereby increasing the range of the methanol liquid sprayed by the spray head 601, so as to improve the efficiency of the methanol liquid absorbing carbon dioxide in the acidic gas.
[0049] The liquid supplement mechanism continuously supplements low-temperature methanol liquid into the spraying mechanism. Then, the methanol liquid sprayed by the spraying mechanism will enter the primary purification chamber 105 through the secondary purification chamber 106. During the process, the methanol liquid on the filler 11 in the secondary purification chamber 106 will be replaced, thereby improving the absorption efficiency of the methanol liquid in each purification chamber.
[0050] After the amount of methanol liquid in the absorption tower 1 reaches the designed loading amount, it is discharged through the liquid discharge port 102, and the purified acidic gas will be discharged through the gas outlet 104 to the device of the next treatment process. Through multiple purifications of the methanol liquid in the primary purification chamber 105, the secondary purification chamber 106, and the deep purification chamber 107, the carbon dioxide content in the acidic gas can be effectively reduced, thereby improving the ability of the methanol liquid to capture carbon dioxide.
[0051] As a further solution of the present utility model, the liquid supplement mechanism includes a condensation box 7; a water pump 8 is fixedly installed on the condensation box 7. A liquid inlet pipe 10 is connected between the condensation box 7 and the water inlet end of the water pump 8, and a liquid outlet pipe 9 is connected between the water outlet end of the water pump 8 and the absorption tower 1.
[0052] In this embodiment, the condensation box 7 reduces the temperature of the methanol liquid, enhancing the ability of the methanol liquid to absorb carbon dioxide. Under the pumping action of the water pump 8, the low-temperature methanol liquid will enter the water pump 8 through the liquid inlet pipe 10, enter the absorption tower 1 through the liquid outlet pipe 9, and be discharged from the nozzle 601 of the spraying mechanism. Continuously supplementing the low-temperature methanol liquid into the absorption tower 1 through the liquid supplement mechanism can improve the ability of the device to purify carbon dioxide, and the carbon dioxide content in the acidic gas will be greatly reduced or even completely absorbed after being absorbed by the methanol liquid.
[0053] As a further solution of the present utility model, the stirring mechanism includes a rotating shaft 3 rotatably installed on the absorption tower 1. The rotating shaft 3 is rotatably connected to the filter plate 103, and the rotating shaft 3 penetrates through the primary purification chamber 105, the secondary purification chamber 106, and the deep purification chamber 107; a motor 2 is fixedly installed at the bottom of the absorption tower 1, and the output end of the motor 2 is fixedly connected to the rotating shaft 3; the fan blades 4 are fixedly installed on the rotating shaft 3.
[0054] In this embodiment, before the acidic gas enters the absorption tower 1 through the air inlet 101, the motor 2 is started, and the rotation of the motor 2 drives the rotation of the rotating shaft 3 to drive the rotation of the fan blade 4; then the air inlet 101 is opened to allow the acidic gas to enter the primary purification chamber 105, and the rotating fan blade 4 in the primary purification chamber 105 will agitate the methanol liquid in the primary purification chamber 105, thereby increasing the amount of methanol in contact with the acidic gas and avoiding the situation where only the methanol liquid at the air inlet 101 absorbs carbon dioxide, thus improving the absorption efficiency of the methanol liquid. After being purified by the methanol liquid in the primary purification chamber 105, the acidic gas will enter the secondary purification chamber 106 for secondary purification.
[0055] As a further aspect of the present utility model, the filler 11 has the characteristic of multi-voids that can slow down the flow rate of the gas flow and the liquid flow.
[0056] In this embodiment, after the acidic gas enters the secondary purification chamber 106, the multi-void characteristic of the filler 11 will slow down the gas flow rate, and a large amount of methanol liquid (the methanol liquid that has absorbed carbon dioxide in the deep purification chamber 107 flows in through the filter plate 103) is attached to the filler 11. The voids on the filler 11 will also slow down the flow rate of the methanol liquid flowing into the primary purification chamber 105, thereby increasing the contact time between the methanol liquid and the acidic gas, and thus improving the absorption efficiency of the methanol liquid.
[0057] As a further aspect of the present utility model, the spraying mechanism includes a base 5 fixedly installed at one end of the rotating shaft 3 away from the motor 2; a liquid spraying pipe 6 is fixedly installed on the base 5; a spray head 601 is fixedly installed on the liquid spraying pipe 6; the base 5 is rotatably connected to the liquid outlet pipe 9.
[0058] In this embodiment, when the stirring mechanism operates, the rotating shaft 3 will rotate, thereby driving the rotation of the base 5, and thereby driving the rotation of the spray head 601 through the liquid spraying pipe 6; during the rotation of the spray head 601, methanol liquid (the methanol liquid supplemented by the liquid replenishing mechanism and flowing into the liquid spraying pipe 6 through the liquid inlet and outlet pipe 9) will be continuously sprayed; the rotation and spraying of the spray head 601 increase the spraying area, thereby increasing the contact area between the methanol liquid and the acidic gas, and releasing the methanol liquid in the form of spraying can effectively improve the absorption capacity of the methanol liquid, thereby improving the absorption efficiency of the methanol liquid.
[0059] As a further aspect of the present utility model, the spray head 601 is bent and is inclined in a direction away from the rotating shaft 3.
[0060] In this embodiment, the features that the nozzle 601 is bent and inclined can further increase the contact area between the methanol liquid and the acidic gas, thereby further improving the absorption efficiency of the methanol liquid; and the nozzle 601 is inclined towards the inner wall of the absorption tower 1, so that the methanol liquid can be sprayed onto the inner wall of the absorption tower 1, enabling the relatively clean methanol liquid to wash the absorption tower 1, preventing the methanol liquid containing carbon dioxide from adhering to the absorption tower 1, and thus improving the ability of the device to purify carbon dioxide.
[0061] Through multiple purifications of the methanol liquid in the primary purification chamber 105, the secondary purification chamber 106, and the deep purification chamber 107, the carbon dioxide content in the acidic gas can be effectively reduced, thereby improving the ability of the methanol liquid to capture carbon dioxide.
[0062] As a further solution of the present utility model, a liquid inlet 701 for supplementing methanol is fixedly installed on the condensation box 7.
[0063] In this embodiment, the liquid inlet 701 is connected to the analytical tower. The methanol liquid analyzed by the analytical tower will enter the condensation box 7 through the liquid inlet 701, and the condensation box 7 will cool down the methanol liquid to improve the absorption capacity of the methanol liquid.
[0064] The above embodiments are exemplary rather than restrictive. Therefore, without departing from the spirit or basic features of the present utility model, all technical solutions that can implement the present utility model in other specific forms are included in the present utility model.
Claims
1. A carbon dioxide capture device for purifying low-temperature methanol washing, comprising an absorption tower (1), an air inlet (101) fixedly installed at the bottom side of the absorption tower (1), and an air outlet (104) fixedly installed above the absorption tower (1); a liquid discharge port (102) is fixedly installed at the bottom of the absorption tower (1); It is characterized in that A plurality of filter plates (103) are fixedly installed in the absorption tower (1), and the filter plates (103) divide the inner side of the absorption tower (1) into a primary purification chamber (105), a plurality of secondary purification chambers (106), and a deep purification chamber (107) in the gas flow direction; A stirring mechanism is arranged in the primary purification chamber (105); a fan blade (4) is connected to the stirring mechanism, and the stirring mechanism can drive the fan blade (4) to rotate; The secondary purification chamber (106) is filled with a filler (11); A spraying mechanism connected to the stirring mechanism is arranged in the deep purification chamber (107), a spray head (601) is connected to the spraying mechanism, and the spraying mechanism can drive the spray head (601) to rotate; A liquid supplement mechanism for supplementing methanol is also provided on the absorption tower (1).
2. The purification low-temperature methanol washing carbon dioxide capture device according to claim 1, characterized in that, The liquid supplement mechanism includes a condensation box (7); a water pump (8) is fixedly installed on the condensation box (7), the condensation box (7) is communicated with the water inlet end of the water pump (8) through a liquid inlet pipe (10), and the water outlet end of the water pump (8) is communicated with the absorption tower (1) through a liquid outlet pipe (9).
3. The purification low-temperature methanol wash carbon dioxide capture device according to claim 2, characterized in that, The stirring mechanism includes a rotating shaft (3) rotatably installed on the absorption tower (1), the rotating shaft (3) is rotatably connected to the filter plate (103), and the rotating shaft (3) penetrates through the primary purification chamber (105), the secondary purification chamber (106), and the deep purification chamber (107); a motor (2) is fixedly installed at the bottom of the absorption tower (1), the output end of the motor (2) is fixedly connected to the rotating shaft (3); the fan blade (4) is fixedly installed on the rotating shaft (3).
4. A carbon dioxide capture device for purifying low-temperature methanol washing according to claim 3, characterized in that, The filler (11) has the characteristic of multi-voids that can slow down the gas flow rate and liquid flow rate.
5. The purification low-temperature methanol wash carbon dioxide capture device according to claim 4, wherein The spraying mechanism includes a base (5) fixedly installed at one end of the rotating shaft (3) away from the motor (2); a liquid spraying pipe (6) is fixedly installed on the base (5); the spray head (601) is fixedly installed on the liquid spraying pipe (6); the base (5) is rotatably connected to the liquid outlet pipe (9).
6. The purification low-temperature methanol washing carbon dioxide capture device according to claim 5, characterized in that, The spray head (601) is bent and is inclined in a direction away from the rotating shaft (3).
7. A carbon dioxide capture device for purifying low-temperature methanol washing according to claim 2, characterized in that, A liquid inlet (701) for supplementing methanol is fixedly installed on the condensation box (7).