Gas-liquid mixing device

Abstract

The present invention discloses a gas-liquid mixing device, which belongs to the field of gas-liquid mixing technology, and comprises an outer shell, wherein an inner drum is rotatably connected inside the outer shell, a mixing gap is arranged between the outer wall of the inner drum and the inner wall of the outer shell, and a diversion cavity is arranged at the center of the inner drum; a plurality of mixing grooves are arrayed on the inner drum; a plurality of through holes connected to the diversion cavity are opened on the groove walls of the plurality of mixing grooves, and the width of each mixing groove gradually increases from the side close to the inner drum to the side close to the mixing gap. Liquid and gas enter the mixing groove through the through holes, and in the mixing groove, the gas-liquid mixture is first on the narrower side of the mixing groove, and then naturally widens to the wide side of the mixing groove along the flow direction. During this flow process, the unique cross-sectional area change of the mixing groove prompts the fluid velocity to be redistributed, increases the contact area between the gas and the liquid, and improves the mixing effect.

Description

Technical Field

[0001] The invention relates to a gas-liquid mixing device, belonging to the technical field of gas-liquid mixing. Background Art

[0002] In the existing gas-liquid mixing technology, stirring paddles are generally used as the main mixing means, but this method has the problems of low mixing efficiency and insufficient gas-liquid contact. Although stirring paddles can promote gas-liquid mixing to a certain extent, due to their relatively simple stirring method, it is often difficult to form sufficient turbulence and eddy currents during the mixing process, resulting in limited mixing effect. Therefore, a gas-liquid mixing device is proposed. Summary of the invention

[0003] The object of the present invention is to provide a gas-liquid mixing device to solve the problems raised in the above background technology.

[0004] In order to achieve the above object, the present invention adopts the following technical solution: a gas-liquid mixing device, comprising:

[0005] A housing, wherein one end of the housing is provided with a feeding portion for feeding liquid and gas, and the other end of the housing is provided with a discharging portion;

[0006] The inner drum is used to contain the liquid and gas introduced by the feed part. The inner drum is rotatably connected to the inside of the outer shell. A mixing gap is provided between the outer wall of the inner drum and the inner wall of the outer shell. A diversion cavity is provided at the center of the inner drum.

[0007] A plurality of mixing grooves, wherein the plurality of mixing grooves are arranged in an array on the inner drum around the diverter cavity, and the plurality of mixing grooves are used to connect the diverter cavity with the mixing gap;

[0008] A plurality of filling slots, each of which is located between two adjacent mixing slots, the filling slot is communicated with the mixing gap, and one end of the filling slot is connected to the discharge portion;

[0009] Among them, one side of the mixing groove is connected to the mixing gap, and multiple through holes connected to the diversion cavity are opened on the groove wall of multiple mixing grooves, and the width of each mixing groove gradually increases from the side close to the inner drum to the side close to the mixing gap.

[0010] Preferably, a plurality of first paddles are arranged in a circumferential array on the outer wall of the inner drum, and a plurality of second paddles are arranged in a circumferential array on the inner wall of the outer shell. The first paddles and the second paddles are located in the mixing gap, and the first paddles and the second paddles are inclined in opposite directions.

[0011] Preferably, the interior of the filling groove is filled with filling particles, and the filling particles generate irregular flow gaps in the filling groove.

[0012] Preferably, a plurality of first grid plates are arranged on the outer wall of the inner drum, and a plurality of filling slots are connected with the mixing gap through grid holes on the corresponding first grid plates.

[0013] Preferably, the feeding section comprises:

[0014] A lower end cover, the lower end cover is arranged at the lower end of the shell, and the inner cavity of the lower end cover is connected with the diversion cavity;

[0015] A liquid inlet pipe, which is arranged on the lower end cover and is used to introduce liquid into the interior of the lower end cover;

[0016] An air inlet pipe is arranged in the lower end cover, and a plurality of air outlet holes are evenly opened on the air inlet pipe for introducing gas into the interior of the lower end cover, and one end of the air inlet pipe passes through the lower end cover and extends to the outside.

[0017] Preferably, a rotating shaft is arranged inside the lower end cover, one end of the rotating shaft is fixedly connected to the inner drum, the rotating shaft is coaxially arranged with the inner drum, and the other end of the rotating shaft extends to the lower end cover and is fixed with a gear connected to an external power source.

[0018] Preferably, a conical block is sleeved on the rotating shaft, and a mixing space for primary mixing of liquid and gas is provided between the end surface of the conical block and the side wall of the lower end cover;

[0019] When the liquid inlet pipe injects liquid into the lower end cover, the liquid flows from the outermost circle of the end surface of the conical block to the middle of the mixing space;

[0020] The end surface of the conical block is evenly distributed with a plurality of stirring rods along the circumference of the rotating shaft;

[0021] When the conical block rotates, the stirring rod moves the liquid and gas in the mixing space toward the outermost circle of the conical block.

[0022] Preferably, the discharging part comprises:

[0023] An upper end cover, the upper end cover is arranged at the upper end of the shell, and the inner cavity of the upper end cover is connected with a plurality of filling slots;

[0024] A liquid outlet pipe is arranged on the upper end cover and is used to discharge the liquid in the upper end cover.

[0025] Preferably, a partition is fixedly mounted on the upper end of the inner drum, and a second grid plate for connecting the upper end cover with the filling tank is arranged on the partition.

[0026] Compared with existing technologies:

[0027] After the liquid and gas enter the diversion chamber synchronously, they enter the mixing tank through the through hole together. In the mixing tank, the gas-liquid mixture is first on the narrow side of the mixing tank, and then naturally widens to the wide side of the mixing tank along the flow direction. During this flow process, the unique cross-sectional area change of the mixing tank causes the fluid velocity to be redistributed, increasing the contact area between the gas and the liquid and improving the mixing effect. At the same time, the eddy and turbulent phenomena generated inside the mixing tank further promote the uniformity and efficiency of gas-liquid mixing, achieving a more efficient mixing process.

[0028] When the inner drum rotates, the first paddle pushes the liquid and gas mixture to flow in one direction, while the second paddle applies force in the opposite direction. This force in opposite directions generates shear force and turbulence, thereby breaking the laminar flow state of the liquid and gas and promoting mixing between them. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the present invention.

[0030] Figure 2 It is a front view of the overall structure of the present invention.

[0031] Figure 3 For the present invention Figure 2 Sectional view at AA.

[0032] Figure 4 For the present invention Figure 2 Cross-sectional view at BB.

[0033] Figure 5 It is a cross-sectional view of the outer shell, the feeding part, the discharging part and the inner drum of the present invention.

[0034] Figure 6 It is an exploded view of the inner drum and the partition of the present invention.

[0035] In the figure:

[0036] 1. Shell;

[0037] 101, feed part, 1011, lower end cover, 1012, liquid inlet pipe, 1013, air inlet pipe;

[0038] 102, discharging part, 1021, upper end cover, 1022, liquid outlet pipe;

[0039] 2. inner rotating cylinder, 201. diversion chamber, 202. mixing tank, 203. through hole, 204. filling tank;

[0040] 3. First shift plate, 4. Second shift plate, 5. First grid plate;

[0041] 6. rotating shaft, 7. conical block, 701. stirring rod;

[0042] 8. partition, 801, second grid plate;

[0043] 9. Water entry hole. DETAILED DESCRIPTION

[0044] The present invention is described below with specific embodiments, but they are not intended to be limiting of the invention.

[0045] Embodiment 1

[0046] like Figure 1-Figure 6 As shown, in this embodiment, a gas-liquid mixing device is provided, including an outer shell 1, one end of the outer shell 1 is provided with a feed part 101 for feeding liquid and gas, and the other end of the outer shell 1 is provided with a discharge part 102; the inner part of the outer shell 1 is rotatably connected with an inner drum 2, the inner drum 2 is used to accommodate liquid and gas introduced by the feed part 101, a mixing gap is provided between the outer wall of the inner drum 2 and the inner wall of the outer shell 1, and a diverter cavity 201 is provided at the center of the inner drum 2; a plurality of mixing grooves 202 are arranged circumferentially around the diverter cavity 201 on the inner drum 2, and the plurality of mixing grooves 202 are used to connect the diverter cavity 201 with the mixing gap; a filling groove 204 is provided between each adjacent two mixing grooves 202, the filling groove 204 is connected with the mixing gap, and one end of the filling groove 204 is connected with the discharge part 102.

[0047] Among them, one side of the mixing groove 202 is connected to the mixing gap, and multiple through holes 203 connected to the diversion cavity 201 are opened on the groove wall of multiple mixing grooves 202, and the width of each mixing groove 202 gradually increases from the side close to the inner drum 2 to the side close to the mixing gap.

[0048] like Figure 3 , Figure 4 As shown, with the plane perpendicular to the axis of the inner drum 2 as a reference, the cross section of the mixing groove 202 is V-shaped, the narrow side of the mixing groove 202 is directly opposite to the diversion cavity 201, and the wide side is an opening directly connected to the mixing gap;

[0049] When the liquid and the gas enter the diverter chamber 201 at the same time, the liquid and the gas in the diverter chamber 201 will flow from the through hole 203 to the inside of the mixing tank 202. After the gas-liquid mixture enters the inside of the mixing tank 202, it will first flow to the narrow side of the mixing tank 202, and then flow from the narrow side of the mixing tank 202 to the wide side of the mixing tank 202. When the gas-liquid mixture flows in the mixing tank 202, due to the change in the cross-sectional area of ​​the mixing tank 202 and the redistribution of the flow rate (the centrifugal force generated by the rotation of the inner drum 2), the contact area between the gas and the liquid increases, thereby enhancing the interaction and mixing effect between them, and the eddy and turbulent phenomena in the mixing tank 202 help to further promote mixing. In addition, as Figure 3As shown, the mixing grooves 202 are distributed along the length of the inner drum 2, and the gas-liquid mixture flowing into the mixing grooves 202 through two adjacent through holes 203 (or multiple through holes 203) will also cross-mix with each other, further improving the mixing effect.

[0050] The feed part 101 includes a lower end cover 1011, which is arranged at the lower end of the outer shell 1. The inner cavity of the lower end cover 1011 is connected with the diversion cavity 201, and the lower end cover 1011 also serves to seal the lower end of the mixing gap; a liquid inlet pipe 1012 is arranged on the lower end cover 1011, and the liquid inlet pipe 1012 is used to introduce liquid into the interior of the lower end cover 1011; an air inlet pipe 1013 is arranged in the lower end cover 1011, and a plurality of air outlet holes are evenly opened on the air inlet pipe 1013, and the air inlet pipe 1013 is used to introduce gas into the interior of the lower end cover 1011, and one end of the air inlet pipe 1013 passes through the lower end cover 1011 and extends to the outside.

[0051] like Figure 1-Figure 3 As shown, in order to drive the inner drum 2 to rotate, a rotating shaft 6 is provided inside the lower end cover 1011, one end of the rotating shaft 6 is fixedly connected to the inner drum 2, the rotating shaft 6 and the inner drum 2 are coaxially arranged, the other end of the rotating shaft 6 extends to the lower end cover 1011 and is fixed with a gear connected to an external power source, and the rotating shaft 6 passes through the lower end cover 1011 where a sealing member is provided for sealing to prevent leakage of liquid in the lower end cover 1011, and a sealing ring can be used as the sealing member.

[0052] The discharge part 102 includes an upper end cover 1021, which is arranged at the upper end of the outer shell 1. The inner cavity of the upper end cover 1021 is connected to multiple filling grooves 204. The upper end cover 1021 also plays a role in sealing the upper end of the mixing gap; a liquid outlet pipe 1022 is arranged on the upper end cover 1021, and the liquid outlet pipe 1022 is used to discharge the liquid in the upper end cover 1021.

[0053] Embodiment 2

[0054] like Figure 4 As shown, on the basis of the first embodiment, in order to mix the liquid and the gas in the mixing gap, the outer wall of the inner drum 2 is provided with a plurality of first dial plates 3 in a circular array, and the inner wall of the outer shell 1 is provided with a plurality of second dial plates 4 in a circular array, and the first dial plates 3 and the second dial plates 4 are located in the mixing gap, and the first dial plates 3 and the second dial plates 4 are inclined in opposite directions.

[0055] The first paddle 3 and the second paddle 4 are inclined in opposite directions. When the inner drum 2 rotates, the first paddle 3 pushes the liquid and gas mixture to flow in one direction, while the second paddle 4 applies force in the opposite direction. This force in opposite directions will generate shear force and turbulence, thereby breaking the laminar state of the liquid and gas and promoting mixing therebetween.

[0056] Effect of turbulence: In the mixing gap, the first paddle 3 and the second paddle 4 enhance the interaction between the liquid and the gas by generating turbulence. The small eddies and vortices in the turbulence will divide the liquid and the gas into smaller droplets or bubbles, thereby increasing the contact opportunities and mixing uniformity between them.

[0057] Effect of shear force: The relative movement between the first paddle 3 and the second paddle 4 will also generate shear force, which helps to divide the liquid and gas in the mixing gap into smaller units and promotes mass transfer and energy exchange between them, further enhancing the mixing effect.

[0058] Due to the tilting direction and rotational movement of the first paddle 3 and the second paddle 4, the liquid and gas mixture forms a circulating flow pattern in the mixing gap. This circulating flow helps to bring different parts of the mixture together, thereby achieving a more uniform mixing. At the same time, the circulating flow also helps to quickly disperse the newly added liquid or gas into the entire mixture.

[0059] Embodiment 3

[0060] like Figure 4-Figure 6 As shown, on the basis of the first embodiment, in order to further mix the gas and liquid, the filling tank 204 is filled with filling particles, and the filling particles generate irregular flow gaps in the filling tank 204; due to the presence of the filling particles, the gas-liquid mixture is forced to flow on the surface and in the gaps of the filling particles when passing through the filling tank 204. This flow mode greatly increases the contact area between the gas and the liquid, so that the two have more opportunities to mix; and due to the irregular flow gaps in the filling tank 204, the gas-liquid mixture needs to bypass or pass through the filling particles when passing through, which increases its residence time in the filling tank 204. A longer residence time means that the gas and liquid have more time to mix with each other.

[0061] In addition, the filling particles can be plastic particles, which can reduce the weight while meeting the need to generate irregular flow gaps.

[0062] A plurality of first grid plates 5 are provided on the outer wall of the inner drum 2, and a plurality of filling slots 204 are connected to the mixing gap through the grid holes on the corresponding first grid plates 5. A partition plate 8 is fixedly installed on the upper end of the inner drum 2, and a second grid plate 801 for connecting the upper end cover 1021 with the filling slots 204 is provided on the partition plate 8. The addition of the first grid plates 5 and the second grid plates 801 can realize the connection between the filling slots 204 and the mixing gap and the inner cavity of the upper end cover 1021, and at the same time, the filling particles can be better confined in the filling slots 204.

[0063] Embodiment 4

[0064] like Figure 3, Figure 5 as well as Figure 6 As shown, based on the above embodiment, in order to preliminarily mix the gas and the liquid in the lower end cover 1011, a conical block 7 is sleeved on the rotating shaft 6, as shown in FIG. Figure 3 As shown, a gap is provided between the outermost circle of the end surface of the conical block 7 and the lower end cover 1011, and a mixing space for primary mixing of liquid and gas is provided between the end surface of the conical block 7 and the side wall of the lower end cover 1011. The air inlet pipe 1013 is distributed in the mixing space to inject gas into the mixing space, and the air inlet pipe 1013 is provided in a ring shape to make the gas more evenly distributed in the mixing space; Figure 6 As shown, a water inlet hole 9 is provided on the rotating shaft 6, and the water inlet hole 9 is located at the center of the mixing space. When the liquid inlet pipe 1012 injects liquid into the lower end cover 1011, the liquid will flow from bottom to top inside the lower end cover 1011, and then the liquid will flow from the outermost circle of the end surface of the conical block 7 to the middle of the mixing space. At the same time, the air inlet pipe 1013 injects gas into the mixing space, and the gas and liquid are preliminarily mixed in the mixing space. The gas-liquid mixture in the mixing space converges at the water inlet hole 9 and flows into the inside of the diversion cavity 201 from the water inlet hole 9.

[0065] In addition, in order to better achieve the initial mixing of gas and liquid in the mixing space, the end face of the conical block 7 is evenly distributed with a plurality of stirring rods 701 along the circumference of the rotating shaft 6. When the rotating shaft 6 rotates with the inner drum 2, the rotating shaft 6 will also rotate with the conical block 7. During the rotation of the conical block 7, the stirring rod 701 is used to move a layer of gas-liquid mixture close to the end face of the conical block 7 toward the outermost circle of the conical block 7. At this time, the moved gas-liquid mixture flows centrifugally and generates a relative flow with the gas-liquid mixture flowing from the outermost circle of the end face of the conical block 7 to the middle of the mixing space. The relative flow can generate shear force, which helps to divide the liquid and gas in the mixing space into smaller units, thereby improving the mixing effect.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A gas-liquid mixing device, characterized in that: include: A housing (1), wherein one end of the housing (1) is provided with a feed portion (101) for feeding liquid and air, and the other end of the housing (1) is provided with a discharge portion (102); An inner drum (2) is used to contain liquid and gas introduced by the feed portion (101); the inner drum (2) is rotatably connected to the inside of the outer shell (1); a mixing gap is provided between the outer wall of the inner drum (2) and the inner wall of the outer shell (1); and a flow dividing chamber (201) is provided at the center of the inner drum (2); A plurality of mixing grooves (202), wherein the plurality of mixing grooves (202) are arranged in an array circumferentially around the flow diversion cavity (201) on the inner rotating cylinder (2), and the plurality of mixing grooves (202) are used to connect the flow diversion cavity (201) and the mixing gap; A plurality of filling slots (204), each filling slot (204) being located between two adjacent mixing slots (202), the filling slot (204) being communicated with the mixing gap, and one end of the filling slot (204) being connected to the discharge portion (102); Wherein, with the surface perpendicular to the axis of the inner drum (2) as a reference, the cross section of the mixing groove (202) is V-shaped, the narrow side of the mixing groove (202) is directly opposite to the diversion cavity (201), and a plurality of through holes (203) communicating with the diversion cavity (201) are provided on the groove wall of each mixing groove (202), and the wide side of each mixing groove (202) is in an open shape directly communicating with the mixing gap; A plurality of first dial plates (3) are arranged in a circular array on the outer wall of the inner drum (2), and a plurality of second dial plates (4) are arranged in a circular array on the inner wall of the outer shell (1). The first dial plates (3) and the second dial plates (4) are located in the mixing gap, and the first dial plates (3) and the second dial plates (4) are inclined in opposite directions.

2. A gas-liquid mixing device according to claim 1, characterized in that: The interior of the filling groove (204) is filled with filling particles, and the filling particles generate irregular flow gaps in the filling groove (204).

3. A gas-liquid mixing device according to claim 2, characterized in that: A plurality of first grid plates (5) are provided on the outer wall of the inner drum (2), and a plurality of filling slots (204) are connected to the mixing gap through grid holes on the corresponding first grid plates (5).

4. A gas-liquid mixing device according to claim 1, characterized in that: The feeding part (101) comprises: A lower end cover (1011), the lower end cover (1011) being arranged at the lower end of the outer shell (1), the inner cavity of the lower end cover (1011) being in communication with the diversion cavity (201); a liquid inlet pipe (1012), the liquid inlet pipe (1012) being arranged on the lower end cover (1011) and being used for introducing liquid into the interior of the lower end cover (1011); An air intake pipe (1013), the air intake pipe (1013) being arranged in the lower end cover (1011), the air intake pipe (1013) being evenly provided with a plurality of air outlet holes for introducing gas into the interior of the lower end cover (1011), and one end of the air intake pipe (1013) passing through the lower end cover (1011) and extending to the outside.

5. A gas-liquid mixing device according to claim 4, characterized in that: A rotating shaft (6) is arranged inside the lower end cover (1011), one end of the rotating shaft (6) is fixedly connected to the inner rotating drum (2), the rotating shaft (6) and the inner rotating drum (2) are arranged coaxially, and the other end of the rotating shaft (6) extends to the lower end cover (1011) and is fixed with a gear connected to an external power source.

6. A gas-liquid mixing device according to claim 5, characterized in that: A conical block (7) is sleeved on the rotating shaft (6), and a mixing space for primary mixing of liquid and gas is provided between the end surface of the conical block (7) and the side wall of the lower end cover (1011); When the liquid inlet pipe (1012) injects liquid into the lower end cover (1011), the liquid flows from the outermost circle of the end surface of the conical block (7) to the middle of the mixing space; The end surface of the conical block (7) is evenly distributed with a plurality of stirring rods (701) along the circumference of the rotating shaft (6); When the conical block (7) rotates, the stirring rod (701) moves the liquid and gas in the mixing space toward the outermost circle of the conical block (7).

7. A gas-liquid mixing device according to claim 1, characterized in that: The discharging portion (102) comprises: An upper end cover (1021), the upper end cover (1021) being arranged at the upper end of the outer shell (1), the inner cavity of the upper end cover (1021) being in communication with the plurality of filling slots (204); A liquid outlet pipe (1022), wherein the liquid outlet pipe (1022) is arranged on the upper end cover (1021) and is used to discharge the liquid in the upper end cover (1021).

8. A gas-liquid mixing device according to claim 7, characterized in that: A partition plate (8) is fixedly mounted on the upper end of the inner drum (2), and a second grid plate (801) for connecting the upper end cover (1021) with the filling tank (204) is provided on the partition plate (8).

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