CN111804164A - A multi-stage gas-liquid mixing device - Google Patents

Abstract

The invention relates to a multi-stage gas-liquid mixing device, comprising: a pipeline body and a first mixing part, a second mixing part and a third mixing part located in the pipeline body; The liquid inlet of the wall, the liquid inlet is tangent to the pipe body; the second mixing part includes a plurality of radially extending cylindrical cavities and glass balls filling the cylindrical cavity; the third mixing part includes a conical cavity communicating with the cylindrical cavity, The longitudinal cross-sectional area of the conical cavity increases from close to the cylindrical cavity to the direction away from the cylindrical cavity; after the air is passed into the pipe body, the liquid enters the liquid inlet tangentially to form a swirling flow, and cuts the air to form a first-stage mixture; After the mixture enters the cylindrical cavity, it is extruded and cavitated by the glass ball to form a secondary mixture; the secondary mixture flows along the conical cavity and is cut to form a tertiary mixture when it is ejected from the large diameter of the conical cavity; Mixing, with better mixing efficiency, suitable for a variety of work that requires sterilization and disinfection.

Description

A multi-stage gas-liquid mixing device

technical field

The invention relates to the technical field of gas-liquid mixing, in particular to a multi-stage gas-liquid mixing device.

Background technique

At present, the gas-liquid mixing methods widely used in the market include static mixers, venturi tubes, jets, and gas-liquid mixing pumps. Static mixers are widely used due to their advantages of no power, small investment, and large production volume, but their mass transfer efficiency is low. Similar to the ejector, the Venturi tube uses the negative pressure formed by the rapid flow of the liquid to inhale the gas to realize the gas Liquid mixing requires no power, but for insoluble gases, the mixing efficiency of gas-liquid two-phase is not high; the gas-liquid mixing pump mixes and stirs liquid and gas through the pump impeller rotating at high speed, and at the same time pressurizes to improve the mixing effect, the disadvantage is that It needs external power and has a certain energy consumption. Therefore, a novel multi-stage gas-liquid mixing device with high mixing efficiency and no energy supply is proposed.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a multi-stage gas-liquid mixing device.

The technical solution adopted by the present invention to solve the technical problem is: a multi-stage gas-liquid mixing device, comprising: a pipeline body and a first mixing part, a second mixing part and a third mixing part located in the pipeline body;

The first mixing part includes a liquid inlet opened on the side wall of the air inlet end of the pipeline body, and the liquid inlet is tangent to the pipeline body;

The second mixing part includes a plurality of radially extending cylindrical cavities, and glass balls filling the cylindrical cavities;

The third mixing part includes a conical cavity communicating with the cylindrical cavity, and the longitudinal cross-sectional area of the conical cavity increases from approaching the cylindrical cavity to a direction away from the cylindrical cavity; wherein

After the air is introduced into the pipeline body, the liquid enters the liquid inlet tangentially to form a swirling flow, and cuts the air to form a first-stage mixture;

After the primary mixture enters the cylindrical cavity, it is extruded and cavitated by the glass ball to form a secondary mixture;

The first-stage and the second-stage mixture flow along the conical cavity and are cut to form a tertiary-stage mixture when sprayed from the large diameter of the conical cavity.

Preferably, the pipe body comprises a first pipe body and a second pipe body fixed to each other;

The liquid inlet is opened on the side wall of the first pipe body, and the liquid inlet is fixedly connected with a liquid inlet pipe, wherein

The liquid flows into the first pipe body tangentially, and forms a swirling flow inside the first pipe body.

Preferably, both ends of the first pipe body are respectively provided with a first end plate and a second end plate, and the first end plate and the first pipe body are connected by clamps, and the first pipe body , the second end plate is connected with the second pipe body through a clamp;

The middle part of the first end plate is provided with an air inlet;

The middle part of the second end plate is provided with a liquid outlet; wherein

After the air enters the first pipe body from the air inlet, it is cut by the swirl flow to form the primary mixture, and then discharged into the second pipe body through the liquid outlet.

Preferably, a cavity is recessed inwardly at one end of the second pipe body close to the first pipe body;

Each cylindrical cavity communicates with the cavity, and the liquid outlet communicates with the cavity, wherein

After the primary mixture enters the cavity through the liquid outlet, the first mixture splits into each cylindrical cavity and is squeezed by the glass ball.

Preferably, a grid plate is provided at the opening of the cylindrical cavity, wherein

The grid plate can block the glass ball from sliding out of the corresponding cylindrical cavity.

Preferably, a fixing block is integrally provided on the inner wall of the second pipe body, the cylindrical cavity is opened at one end of the fixing block, and the conical cavity is opened at the other end of the fixing block;

And the large-diameter position of the conical cavity is provided with a water distributor, wherein

The tertiary mixture flowing out of the conical cavity is sprayed through the water distributor.

Preferably, the water distributor includes a water distribution body rotatably connected to the fixed block, and the cross section of the water distribution body is tapered;

The area between the water distribution body and the second pipe body is a water distribution cavity,

The minimum gap between the water distribution body and the second pipe body is the annular gap, wherein

After the tertiary mixture flows out from the conical cavity to the water distribution cavity, it is ejected through the annular gap.

Preferably, the inner diameter of the first pipe is d, the inner diameter of the liquid inlet pipe is d ₁ , and the length of the first pipe is L ₁ , wherein

d ₁ =0.2~0.3d, L ₁ =1.2~1.5d ₁ .

Preferably, the length of the cavity is L ₂ , L ₂ =0.15~0.2d; the inner diameter of each cylindrical cavity is d _{2 ,} the length of the second mixing portion is L ₃ , and the diameter of the glass ball is d ₃ , d ₂ =0.3d, L ₃ =1.5~2.0d ₂ , d ₃ =0.4d ₂ .

Preferably, the diameter of each small opening of the conical cavity is d ₄ , and the diameter of each large opening of the conical cavity is d ₅ , d ₄ =0.2d ₂ , d ₅ =5.0~6.0d ₄ ; the circle The width of the ring gap is w, and the water distribution angle of the water distributor is θ, w=0.5mm, θ=90°~120°.

The beneficial effects of the present invention are as follows: the multi-stage gas-liquid mixing device of the present invention realizes the effect of gas-liquid mixing through the setting of the three-stage mixing part, realizes the primary mixing of gas and liquid through the first mixing part, and realizes the primary mixing of gas and liquid through the second mixing part. The mixing part mixes the preliminarily mixed mixture again, and the gas-liquid mixture is finally mixed through the third mixing part, and the gas-liquid mixing effect is gradually strengthened, which can significantly improve the gas dissolution rate and mass transfer efficiency; and the invention The structure is simple, easy to assemble, and can be used in parallel when the water intake is large; through the mixing effect of the three-level setting, it can be widely used in various fields requiring sterilization and disinfection.

Description of drawings

The present invention will be further described below with reference to the accompanying drawings and embodiments.

1 is a perspective view of a multi-stage gas-liquid mixing device of the present invention;

Figure 2 is a schematic structural diagram of a preferred embodiment of a multi-stage gas-liquid mixing device of the present invention;

Fig. 3 is the sectional view of A-A in Fig. 2;

4 is a left side view of a multi-stage gas-liquid mixing device of the present invention;

5 is a perspective view of the second mixing portion according to the present invention;

Fig. 6 is a perspective view of the grid plate of the present invention.

In the picture:

The first mixing part 1, the liquid inlet 12, the liquid inlet pipe 121, the first end plate 130, the second end plate 131, the air inlet 14, the liquid outlet 15, the clamp 16;

The second mixing part 2, the cylindrical cavity 21, the glass ball 22, the cavity 23, the grid plate 231, the fixing block 24;

The third mixing part 3, the conical cavity 31, the water distributor 32, the water distribution cavity 321, the water distribution body 322, and the annular gap 323;

The pipe body 4 , the first pipe body 41 , and the second pipe body 42 .

Detailed ways

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present invention in a schematic manner, so they only show the structures related to the present invention.

As shown in FIGS. 1 to 6 , a multi-stage gas-liquid mixing device of the present invention includes: a pipeline body 4 and a first mixing part 1 , a second mixing part 2 and a third mixing part 3 located in the pipeline body 4 ; The first mixing part 1 includes a liquid inlet 12 opened on the side wall of the inlet end of the pipeline body 4, and the liquid inlet 12 is tangent to the pipeline body 4; the second mixing part 2 includes Several radially extending cylindrical cavities 21 and glass balls 22 filling the cylindrical cavities 21; the third mixing part 3 includes a conical cavity 31 communicating with the cylindrical cavity 21, The cross-sectional area increases from approaching the cylindrical cavity 21 to the direction away from the cylindrical cavity 21; after the air enters the pipe body 4, the liquid enters the liquid inlet 12 tangentially to form a swirling flow, and cuts the The air forms a primary mixture; after the liquid enters the pipe body 4 through the tangentially arranged liquid inlet 12 , a swirling flow is formed in the pipe body 4 , and the swirling liquid forms a negative flow in the pipe body 4 . Pressure and suck the air entering from the intake end to form an air column, the air column and the swirling liquid cut each other at the liquid outlet end to form many bubbles, and the gas is initially dissolved in the liquid to form a first-stage mixture; when the first-stage mixture enters After the cylindrical cavity 21 is squeezed and cavitated by the glass balls 22 to form a secondary mixture; when the primary mixture is blocked by the glass balls 22, the pressure increases instantaneously, and in the process of flowing through the surface of the glass balls 22 As the speed increases, the pressure is continuously reduced, and cavitation is achieved when the final pressure drops below the saturated vapor pressure at the liquid-solid interface, forming a secondary mixture; the secondary mixture flows along the conical cavity 31 and flows from the The large diameter of the conical cavity 31 is cut to form a tertiary mixture when it is ejected; the secondary mixture enters the small diameter of the conical cavity 31 from the cylindrical cavity 21 with a larger diameter, and an instantaneous high pressure will be generated, As the diameter of the conical cavity 31 becomes larger, the pressure decreases continuously, and finally the liquid and the bubbles are cut each other again at the large diameter of the conical cavity 31 to further reduce the size of the bubbles to form a tertiary mixture; The setting of the mixing part realizes the effect of gas-liquid mixing, and the gas-liquid mixing effect is strengthened step by step through the swirling flow, the glass ball 22 and the conical cavity 31, which significantly improves the gas dissolution rate and mass transfer efficiency.

Optionally, the pipe body 4 includes a first pipe body 41 and a second pipe body 42 fixed to each other; both ends of the first pipe body 41 and the second pipe body 42 are provided with chucks, so The first pipe body 41 is combined with the chuck to form an I-shape, the second pipe body 42 is combined with the chuck to form an I-shape, and the liquid inlet 12 is opened on the side wall of the first pipe body 41, And the liquid inlet 12 is fixedly connected with a liquid inlet pipe 121, and the liquid inlet pipe 121 is also provided with a thread, the thread is convenient for other pipelines to be connected with the liquid inlet pipe 121, wherein the liquid flows tangentially. The first pipe body 41 forms a swirling flow inside the first pipe body 41, and the liquid flows tangentially into the inner wall of the first pipe body 41 through the liquid inlet pipe 121, and only the tangentially entering The liquid will flow along the inner wall of the first pipe body 41 to form a vortex flow, and after the vortex flow is formed, a negative pressure will be generated at the center of the pipe of the first pipe body 41, which is conducive to inhaling air to form an air column, and the swirling liquid and gas The columns are easily cut and mixed with each other at the liquid outlet end; and the liquid inlet pipes 121 arranged at other angles are unfavorable to form a swirling flow with the liquid on the inner wall of the first pipe body 41 so that gas cannot be sucked to form a gas column.

Optionally, both ends of the first pipe body 41 are respectively provided with a first end plate 130 and a second end plate 131 . Specifically, the first end plate 130 is adapted to the chuck on one side of the first pipe body 41 . , the second end plate 131 corresponds to the chuck on the other side of the first pipe body and the chuck on one side of the second pipe body 42 , and the first end plate 130 and the first pipe body 41 pass through the clamp 16 connection, that is, the clamp 16 is connected to the first end plate 130 and the end surface of the chuck on one side of the first pipe body 41, the first pipe body 41, the second end plate 131 and the The second pipe body 42 is connected by the clamp 16, that is, the clamp 16 is connected to the chuck on the other side of the first pipe body 41 and the end face of the chuck on one side of the second pipe body 42; through the clamp 16. Quickly connect the first pipe body 41 and the second pipe body 42, and when the amount of water inflow is large, they can be used in parallel at the same time. Such a setting structure is simple and easy to assemble; the first end plate 130 An air inlet 14 is arranged in the middle part; a liquid outlet 15 is arranged in the middle part of the second end plate 131; The air entering from the port 14 is well mixed with the liquid entering from the liquid inlet 12, and the cross section of the liquid outlet 15 is also a tapered structure from small to large, so that the first-stage mixture can be at the position of the liquid outlet 15. is cut, which further improves the dissolution rate and mass transfer efficiency of the gas; wherein the air enters the first pipe body 41 from the air inlet 14 and is cut by the swirl flow to form the first-grade mixture, and then passes through the The liquid outlet 15 is discharged into the second pipe body 42 . After the liquid enters the first pipe body 41 through the tangentially arranged liquid inlet pipe 121 , a swirling flow is formed in the first pipe body 41 , and the swirling liquid forms a negative flow in the first pipe body 41 . pressure and suck air from the air inlet 14 to form an air column, and the liquid outlet 15 and the air inlet 14 are on the same centerline, and the swirling liquid collides with the air column at the liquid outlet 15 And cut each other, this arrangement can enhance the contact area between the gas column and the liquid to enhance the mixing effect.

Optionally, a cavity 23 is recessed inwardly at one end of the second pipe body 42 close to the first pipe body 41 ; each cylindrical cavity 21 communicates with the cavity 23 , and the liquid outlet 15 It communicates with the cavity 23 , wherein after the first-stage mixture enters the cavity 23 through the liquid outlet 15 , the first mixture flows into each cylindrical cavity 21 and is squeezed by the glass balls 22 pressure. There are four cylindrical cavities 21 , a grid plate 231 is provided at the opening of the cylindrical cavity 21 , and the grid plate 231 is a honeycomb grid plate 231 , wherein the grid plate 231 can block the glass balls 22 slides out from the corresponding cylindrical cavity 21 . After the first-stage mixture enters the cavity 23 through the liquid outlet 15, the first mixture is evenly distributed into each cylindrical cavity 21 through the cavity 23 to achieve the effect of shunting, so that the The first mixture can achieve rapid flow on the surface of the glass ball surface 22 at a faster speed in a smaller flow section, thereby improving the dissolution rate and mass transfer efficiency of the gas in the liquid; The grid plate 231 provided in the 23 can not only divide the bubbles of the first mixture into smaller sizes, but also have the effect of fixing and limiting the glass balls 22 .

Optionally, the inner wall of the second pipe body 42 is integrally provided with a fixing block 24 , the cylindrical cavity 21 is opened at one end of the fixing block 24 , and the conical cavity 31 is opened at the end of the fixing block 24 . The other end; and the large-diameter position of the conical cavity 31 is provided with a water distributor 32 , wherein the tertiary mixture flowing out of the conical cavity 31 is sprayed through the water distributor 32 . The conical cavity 31 and the cylindrical cavity 21 are in one-to-one correspondence and are on the same centerline, and the secondary mixture enters the small aperture of the conical cavity 31 from the cylindrical cavity 21 with a larger diameter, and an instantaneous high pressure will be generated. , as the caliber continues to increase and the pressure decreases, finally the liquid and the bubbles cut each other again at the large caliber outlet of the conical cavity 31 to further reduce the size of the bubbles to achieve the effect of three-stage mixing.

Preferably, the water distributor 32 includes a water distribution body 322 rotatably connected to the fixing block 24 , and the water distribution body 322 has a tapered cross-section; the water distribution body 322 and the second pipe body The area between 42 is the water distribution cavity 321, and the minimum gap between the water distribution body 322 and the second pipe body 42 is the annular gap 323, where the tertiary mixture flows from the conical cavity. After 31 flows out to the water distribution cavity 321 , it is sprayed out through the annular gap 323 . The water distribution body 322 is plugged and fixed with the fixing block 24 to realize rotation. This setting is beneficial to replace the water distribution body 322 with different annular gaps 323 to obtain different spraying effects, and is also helpful for disassembly and maintenance. For cleaning the clogged water distributor 32.

Preferably, the inner diameter of the first pipe body 41 is d, the inner diameter of the liquid inlet pipe 121 is d ₁ , and the length of the first pipe body 41 is L ₁ , where d ₁ =0.2~0.3d, and L ₁ = 1.2~1.5d ₁ .

Preferably, the length of the cavity 23 is L ₂ , L ₂ =0.15~0.2d; the inner diameter of each cylindrical cavity 21 is d _{2 ,} the length of the second mixing part 2 is L ₃ , and the glass ball 22 The diameters are all d ₃ , d ₂ =0.3d, L ₃ =1.5~2.0d ₂ , d ₃ =0.4d ₂ .

Preferably, the diameter of the small mouth of each of the conical cavity 31 is d4, and the diameter of the large mouth of each of the conical cavity 31 is d ₅ , d ₄ =0.2d ₂ , d ₅ =5.0~6.0d ₄ ; the The width of the annular gap 323 is w, and the water distribution angle of the water distributor 32 is θ, w=0.5mm, and θ=90°~120°.

working principle:

After the liquid enters the first pipe body 41 through the tangentially disposed liquid inlet 12 , it rotates and flows on the inner wall of the first pipe body 41 to form a swirling flow, and the swirling liquid is in the center of the first pipe body 41 . Negative pressure is generated at the shaft and the air from the air inlet 14 is inhaled to form an air column, and the air column and the swirling liquid are cut each other at the liquid outlet 15 to form many bubbles, and the gas is initially dissolved in the liquid to form a primary mixture; The first-stage mixture is evenly distributed to each cylindrical cavity 21 at the cavity 23. When the first-stage mixture is blocked by a plurality of the glass balls 22 placed in the cylindrical cavity, the pressure increases instantaneously. During the process of the surface of the glass ball 22, the pressure is continuously reduced as the speed increases, and cavitation is realized when the final pressure drops below the saturated vapor pressure on the liquid-solid interface to form a secondary mixture; The bottom of the cylindrical cavity 21 flows to the conical cavity 31, and the secondary mixture enters the small diameter of the conical cavity 31 from the cylindrical cavity 21 with a larger diameter, and an instantaneous high pressure will be generated. The diameter of 31 becomes larger, and the pressure decreases continuously. Finally, the liquid and the bubbles are cut each other again at the large diameter of the conical cavity 31, which further reduces the size of the bubbles to form a tertiary mixture; the tertiary mixture finally flows into the cloth Finally, the gas-liquid mixture is discharged through the annular gap 323 .

Taking the above ideal embodiments according to the present invention as inspiration, and through the above description, relevant personnel can make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims (10)

1. A multi-stage gas-liquid mixing device, characterized in that it comprises a pipeline body (4) and a first mixing part (1), a second mixing part (2) and a third mixing part (2) located in the pipeline body (4) Section (3); The first mixing part (1) includes a liquid inlet (12) opened on the side wall of the air inlet end of the pipeline body (4), and the liquid inlet (12) is tangent to the pipeline body (4) ; The second mixing part (2) comprises several radially extending cylindrical cavities (21), and glass balls (22) filling the cylindrical cavities (21); The third mixing part (3) includes a conical cavity (31) in communication with the cylindrical cavity (21), and the longitudinal cross-sectional area of the conical cavity (31) moves away from the cylindrical cavity (21) The cylindrical cavity (21) increases in direction; wherein After the air passes into the pipeline body (4), the liquid enters the liquid inlet (12) tangentially to form a swirling flow, and cuts the air to form a primary mixture; After the primary mixture enters the cylindrical cavity (21), it is extruded and cavitated by the glass ball (22) to form a secondary mixture; When the secondary mixture flows along the conical cavity (31) and is ejected from the large diameter of the conical cavity (31), it is cut to form a tertiary mixture. 2. The multi-stage gas-liquid mixing device according to claim 1, characterized in that, The pipe body (4) includes a first pipe body (41) and a second pipe body (42) fixed to each other; The liquid inlet (12) is opened on the side wall of the first pipe body (41), and the liquid inlet (12) is fixedly connected with a liquid inlet pipe (121), wherein The liquid flows into the first pipe body (41) tangentially, and forms a swirling flow inside the first pipe body (41). 3. The multi-stage gas-liquid mixing device according to claim 2, characterized in that, Both ends of the first pipe body (41) are respectively provided with a first end plate (130) and a second end plate (131), and the first end plate (130) and the first pipe body (41) ) are connected by a clamp (16), the first pipe body (41), the second end plate (131) and the second pipe body (42) are connected by a clamp (16); An air inlet (14) is provided in the middle of the first end plate (130); A liquid outlet (15) is opened in the middle of the second end plate (131); wherein The air enters the first pipe body (41) from the air inlet (14) and is cut by the swirl flow to form the first-stage mixture, and then is discharged into the second pipe body through the liquid outlet (15). Tube body (42). 4. The multi-stage gas-liquid mixing device according to claim 3, characterized in that, A cavity (23) is recessed inwardly at one end of the second pipe body (42) close to the first pipe body (41); Each cylindrical cavity (21) communicates with the cavity (23), and the liquid outlet (15) communicates with the cavity (23), wherein After the primary mixture enters the cavity (23) through the liquid outlet (15), the first mixture is divided into each cylindrical cavity (21) and squeezed by the glass ball (22). . 5. The multi-stage gas-liquid mixing device according to claim 4, characterized in that, A grid plate (231) is provided at the opening of the cylindrical cavity (21), wherein The grid plate (231) can block the glass ball (22) from sliding out of the corresponding cylindrical cavity (21). 6. The multi-stage gas-liquid mixing device according to claim 5, characterized in that, The inner wall of the second pipe body (42) is integrally provided with a fixing block, the cylindrical cavity (21) is opened at one end of the fixing block, and the conical cavity (31) is opened at the other end of the fixing block. one end; and a water distributor (32) is arranged at the large-diameter position of the conical cavity (31), wherein The tertiary mixture flowing out of the conical cavity (31) is sprayed through the water distributor (32). 7. The multi-stage gas-liquid mixing device according to claim 6, characterized in that, The water distributor (32) includes a water distribution body (322) rotatably connected with the fixed block, and the water distribution body (322) has a tapered cross-section; The area between the water distribution body (322) and the second pipe body (42) is a water distribution cavity (321), The minimum gap between the water distribution body (322) and the second pipe body (42) is an annular gap, wherein After the tertiary mixture flows out from the conical cavity (31) to the water distribution cavity (321), it is ejected through the annular gap. 8. The multi-stage gas-liquid mixing device according to claim 7, characterized in that, The inner diameter of the first pipe body (41) is d, the inner diameter of the liquid inlet pipe (121) is d ₁ , and the length of the first pipe body ( 41 ) is L ₁ , wherein d ₁ =0.2~0.3d, L ₁ =1.2~1.5d ₁ . 9. The multi-stage gas-liquid mixing device according to claim 8, characterized in that, The length of the cavity (23) is L ₂ , L ₂ =0.15~0.2d; the inner diameter of each cylindrical cavity ( 21 ) is d _{2 , and} the length of the second mixing portion ( 2 ) is L ₃ , The diameters of the glass balls (22) are all d ₃ , d ₂ =0.3d, L ₃ =1.5-2.0d ₂ , and d ₃ =0.4d ₂ . 10. The multi-stage gas-liquid mixing device according to claim 9, wherein, The diameter of the small mouth of each of the conical cavity (31) is d ₄ , the diameter of the large mouth of each of the conical cavity (31) is d ₅ , d ₄ =0.2d ₂ , d ₅ =5.0~6.0d ₄ ; The width of the annular gap is w, and the water distribution angle of the water distributor (32) is θ, w=0.5mm, and θ=90°~120°.

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