Fluid mixing device for water treatment process

Abstract

The invention discloses a fluid mixing device for a water treatment process, the fluid mixing device comprises a space, a diffusion structure and an additive release device, the diffusion structure comprises an additive diffuser and a fluid diffuser which are oppositely arranged, and the sizes of the additive diffuser and the fluid diffuser are gradually increased in opposite directions; the additive diffuser and the fluid diffuser are provided with a plurality of vortex-shaped flow channels, and the additive releasing device releases additives to the additive diffuser in a pressure mode. The vortex-shaped flow channel is ingeniously arranged on the diffusion structure, on one hand, the mixing effect of additives and fluid can be good, on the other hand, due to the integration of the diffusion structure and the vortex-shaped flow channel, the volume of the diffusion structure is small, the overflowing area of the fluid in the space is large, the mechanical energy loss is greatly reduced, and meanwhile, the diffusion structure is more compact. When the fluid flows from the fluid diffuser to the additive diffuser, the fluid diffuser faces the incoming flow direction and adopts a gradually enlarged structure, so that the fluid resistance is effectively reduced, the mechanical energy loss of the fluid is reduced, and the energy consumption is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the field of mixing technologies, and particularly to a fluid mixing device for a water treatment process. Background Art

[0002] In the water treatment mixing process, static mixers and mechanical stirring mixing equipment are mainly used. In the former, some stationary elements are arranged in the pipe. When two or more fluids pass through these elements, due to the continuous cutting and turning of the fluids, the purpose of full mixing is achieved. However, there are many elements, the layout path is too long, the fluids collide with the elements frequently, and the mechanical energy loss is large, resulting in an increase in energy consumption. In the latter, through mechanical stirring, the paddle is driven by a motor to stir the fluids, so that the fluids are mixed. However, the collision between the fluids and the paddle causes a large mechanical energy loss, and there is also a problem of increased energy consumption. Summary of the Invention

[0003] In order to solve the problems mentioned in the background art, the present invention provides a fluid mixing device for a water treatment process to solve the problem of excessive energy consumption of the mixing device.

[0004] The present invention is realized through the following technical solutions:

[0005] A fluid mixing device for a water treatment process includes a space for fluid flow, a diffusion structure, and an additive release device. The diffusion structure and the additive release device are arranged in the space. The diffusion structure includes an additive diffuser and a fluid diffuser arranged opposite to each other. The sizes of the additive diffuser and the fluid diffuser gradually increase towards each other. The additive diffuser is provided with a plurality of vortex-shaped additive flow channels extending towards the fluid diffuser. The additive release device releases the additive to the additive diffuser under pressure so that the additive diffuses from the small-size end to the large-size end of the additive diffuser. The fluid diffuser is provided with a plurality of vortex-shaped fluid flow channels extending towards the additive diffuser.

[0006] Further, the small-size end of the additive diffuser is defined as the additive inlet end, and the large-size end is defined as the additive outlet end. Each of the additive flow channels extends from the additive inlet end to the additive outlet end, and the length is the same as the length of the additive diffuser.

[0007] Further, the depth of the additive flow channel gradually increases from the additive inlet end to the additive outlet end, or the width gradually increases, or both the depth and the width gradually increase.

[0008] Further, the length of each of the fluid flow channels is the same as the length of the fluid diffuser.

[0009] Further, the additive flow channels and the fluid flow channels are arranged staggeredly, or the additive flow channels and the fluid flow channels correspond to each other one by one.

[0010] Furthermore, the additive diffuser and the fluid diffuser are in the shape of a cone, or a hemisphere, or a semi-ellipsoid, or a horn.

[0011] Furthermore, multiple spiral wall flow channels are provided on the inner wall of the space, and the rotation direction is the same as or opposite to that of the fluid flow channel.

[0012] Furthermore, the additive release device has a release port and an additive delivery pipe. The additive delivery pipe includes a main pipe and at least one branch pipe. When there are more than two branch pipes, they are connected to the main pipe in sequence. The release port is provided on the main pipe and faces the additive diffuser.

[0013] Furthermore, the release port is a flared port that gradually increases, or a straight pipe port, or a constricted port that gradually decreases.

[0014] Furthermore, multiple diffusion structures are evenly arranged in the circumferential direction within the space, and the outside of the space connects multiple additive delivery pipes through a ring pipe.

[0015] Furthermore, the multiple diffusion structures are distributed in a staggered manner along the movement direction of the fluid, or are distributed on the same cross-section perpendicular to the movement direction of the fluid.

[0016] Furthermore, the angle between the tangent line at the middle edge of the additive diffuser and the plane where the central axis of the diffusion structure is located is not greater than 90°.

[0017] Furthermore, an additive delivery unit is provided on the fluid diffuser. The additive delivery unit includes a first additive delivery pipe, a second additive delivery pipe, and a flow guide cover. The first additive delivery pipe is connected to the second additive delivery pipe. The second additive delivery pipe is parallel to the fluid flow direction, with both ends closed, and multiple openings are provided on the pipe wall. The size of the flow guide cover gradually increases, and its large-size end is close to the fluid diffuser. One end of the second additive delivery pipe is fixed to the small-size end of the fluid diffuser, and the other end extends into the flow guide cover and is fixed to the inner wall of its small-size end.

[0018] Furthermore, the flow guide cover is a hollow cone, and its outer wall is straight, or convex outward, or concave inward.

[0019] Furthermore, the fluid flow channel is provided on the surface or inside of the fluid diffuser.

[0020] Furthermore, the additive flow channel is provided on the surface or inside of the additive diffuser.

[0021] Furthermore, when the additive flow channel is arranged on the surface of the additive diffuser, a flow stabilizer is sleeved on the additive diffuser, one end of the flow stabilizer is connected to the release port, and the other end is circumferentially arranged with a liquid outlet corresponding to the end of the additive flow channel, or the end of the additive flow channel is exposed.

[0022] Furthermore, the additive is in the form of liquid or solid, such as: coagulant, flocculant, disinfectant, defluorinating agent, adsorbent, catalyst, scale inhibitor, gelling agent, oxidant, reducing agent, etc.

[0023] Furthermore, the additives may be added alone or in combination.

[0024] Furthermore, the space includes but is not limited to forms such as pipes, channels, and chambers.

[0025] The beneficial effects of the present invention are:

[0026] 1. The present invention ingeniously arranges a vortex-shaped flow channel on the diffusion structure. On the one hand, it can achieve a good mixing effect between the additive and the fluid. On the other hand, the integration of the diffusion structure and the vortex-shaped flow channel makes the diffusion structure small in size, the flow area of ​​the fluid in the space is large, and the mechanical energy loss is greatly reduced. At the same time, when the fluid flows from the fluid diffuser to the additive diffuser, the fluid diffuser faces the incoming flow direction and adopts a gradually expanding structure, which effectively reduces the fluid resistance, reduces the mechanical energy loss of the fluid, and greatly reduces the energy consumption.

[0027] 2. The mixing effect of the additive and the fluid is good, which is reflected in the following aspects: the flow direction of the fluid and the release direction of the additive can be in the same direction or in different directions. When in the same direction, the fluid flows from the additive diffuser to the fluid diffuser. The fluid usually carries a large pressure. At this time, the additive release device can release the additive with pressure or without pressure. Driven by the pressurized fluid, the additive diffuses and mixes in a vortex shape on the additive diffuser, and then flows through the fluid diffuser to form a vortex flow again, so that the additive and the fluid are fully mixed. When in different directions, the fluid flows from the fluid diffuser to the additive diffuser, and the additive release device releases the additive liquid flow to the additive diffuser under pressure and diffuses in a vortex shape on the additive diffuser, while the fluid diffuses in a vortex shape through the fluid diffuser. The two collide in opposite directions to accelerate the mixing of the additive and the fluid. Whether in the same direction or different directions, a significant mixing effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a mixing device according to an embodiment;

[0029] Figure 2 A schematic diagram of a diffusion structure according to an embodiment;

[0030] Figure 3 for Figure 2Cross-sectional view in the A-A direction in [context];

[0031] Figure 4 is Figure 2 Cross-sectional view in the B-B direction in [context];

[0032] Figure 5 Schematic diagram of a structure where the rotation direction of the fluid flow channel is opposite to that of the additive flow channel in an embodiment;

[0033] Figure 6 is Figure 5 Cross-sectional view in the C-C direction in [context];

[0034] Figure 7 Schematic diagram of a structure where the additive diffuser is a cone and the fluid diffuser is a hemisphere in an embodiment;

[0035] Figure 8 Schematic diagram of a structure where the additive diffuser is a cone and the fluid diffuser is trumpet-shaped in an embodiment;

[0036] Figure 9 Schematic diagram of an angle α between the tangent of the middle edge of the additive diffuser and the plane where the central axis of the diffusion structure lies in an embodiment;

[0037] Figure 10 Schematic diagram of a structure where the release port is a straight pipe orifice in an embodiment;

[0038] Figure 11 Schematic diagram of a structure where spiral wall flow channels are provided on the inner wall of the pipe in an embodiment;

[0039] Figure 12 Schematic diagram of a structure where multiple diffusion structures are evenly arranged in the circumferential direction inside the pipe in an embodiment;

[0040] Figure 13 is Figure 12 Cross-sectional view in the D-D direction in [context];

[0041] Figure 14 Schematic diagram of a structure where the additive delivery unit is installed on the diffusion structure in an embodiment;

[0042] Figure 15 is Figure 14 Enlarged view of E in [context];

[0043] Figure 16 Schematic diagram of a structure where the outer wall of the flow deflector bulges outward in an embodiment;

[0044] Figure 17 Schematic diagram of a structure where the outer wall of the flow deflector is recessed inward in an embodiment;

[0045] Figure 18Schematic diagram of the overall structure of a stabilizer shroud sleeved on an additive diffuser for an embodiment;

[0046] Figure 19 Partial schematic diagram of a stabilizer shroud sleeved on an additive diffuser for an embodiment.

[0047] In the figure:

[0048] Diffusion structure 100, additive diffuser 110, additive flow channel 111, additive inlet end 112, additive outlet end 113, fluid diffuser 120, fluid flow channel 121, small-size end 122 of the fluid diffuser, large-size end 123 of the fluid diffuser, bracket 130;

[0049] Space 200, fluid inlet / outlet 210, fluid outlet / inlet 220;

[0050] Additive release device 300, release port 310, main pipe 320, branch pipe 330, annular pipe 340;

[0051] Additive delivery unit 400, first additive delivery pipe 410, second additive delivery pipe 420, opening 421, flow guide cover 430;

[0052] Stabilizer shroud 500, liquid outlet 510. Detailed implementation manners

[0053] The following further explains the structures involved in the present invention or the technical terms used therein. These explanations are merely examples to illustrate how the present invention is implemented and shall not constitute any limitation to the present invention.

[0054] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left" and "right" etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated positions or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. In addition, the terms "first", "second" etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0055] In the description of the present invention, unless otherwise clearly specified and limited, terms such as "connection", "fixation" etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a direct connection, or an indirect connection through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The following embodiments are based on the application of a fluid mixing device for water treatment processes in the field of water treatment. For example, Figure 1-19 as shown, the fluid is raw water, the additive is a coagulant, and the space is a pipeline.

[0057] The fluid mixing device for water treatment processes includes a pipeline 200 for the flow of raw water, a diffusion structure 100, and an additive release device 300. The diffusion structure 100 and the additive release device 300 are arranged inside the pipeline 200. The diffusion structure 100 includes an additive diffuser 110 and a fluid diffuser 120 which are arranged opposite to each other. The sizes of the additive diffuser 110 and the fluid diffuser 120 gradually expand in the same direction. A plurality of vortex-shaped additive flow channels 111 extending towards the fluid diffuser 120 are arranged on the additive diffuser 110. The additive release device 300 releases the additive to the additive diffuser 110 under pressure, causing the additive to diffuse from the small-size end to the large-size end of the additive diffuser 110. A plurality of vortex-shaped fluid flow channels 121 extending towards the additive diffuser 110 are arranged on the fluid diffuser 120.

[0058] The present invention ingeniously arranges vortex-shaped flow channels on the diffusion structure 100. On the one hand, it can achieve a good mixing effect between the coagulant and the raw water. On the other hand, the integration of the diffusion structure 100 and the vortex-shaped flow channels makes the diffusion structure 100 small in volume, the cross-sectional area of the raw water flowing in the pipeline 200 large, and the mechanical energy loss greatly reduced. At the same time, when the raw water flows from the fluid diffuser 120 to the additive diffuser 110, the fluid diffuser 120 faces the oncoming flow direction and adopts a gradually expanding structure, effectively reducing the fluid resistance, reducing the mechanical energy loss of the fluid, and greatly reducing the energy consumption.

[0059] Here, the flow direction of the raw water can be from the fluid diffuser 120 to the additive diffuser 110, or from the additive diffuser 110 to the fluid diffuser 120.

[0060] When the raw water flows from the fluid diffuser 120 to the additive diffuser 110, the release direction of the additive is opposite to the flow direction of the raw water. The additive release device 300 releases the coagulant liquid flow to the additive diffuser 110 under pressure and the coagulant diffuses in a vortex shape on the additive diffuser 110, while the raw water diffuses in a vortex shape through the fluid diffuser 120, and the two collide in reverse, accelerating the mixing of the coagulant and the raw water.

[0061] When the raw water flows from the additive diffuser 110 to the fluid diffuser 120, the raw water usually has a relatively large pressure. At this time, the additive release device 300 can release the coagulant with or without pressure. The coagulant can be in a solid state or a liquid state. Driven by the pressurized raw water, it diffuses in a vortex shape towards the additive diffuser 110 and forms a vortex flow through the fluid diffuser 120 to assist in accelerating the diffusion and mixing of the coagulant after contacting the coagulant at the rear end.

[0062] As an alternative embodiment, as shown in FIG. 2, the small-size end of the additive diffuser 110 is defined as the additive inlet end 112, and the large-size end is defined as the additive outlet end 113. Each additive flow channel 111 extends from the additive inlet end 112 to the additive outlet end 113. The length of the additive flow channel 111 is the same as the length of the additive diffuser 110, and the vortex path is longer, which can improve the mixing effect of raw water and coagulant.

[0063] As an alternative embodiment, the size of the additive flow channel 111 gradually increases from the additive inlet end 112 to the additive outlet end 113. The increasing form is that the depth of the additive flow channel 111 gradually becomes larger, or the width gradually becomes larger, or both the depth and the width gradually become larger. In this way, the mixing of the coagulant and the raw water is further improved.

[0064] As an alternative embodiment, as shown in FIG. 2, each fluid flow channel 121 extends from its small-size end 122 to its large-size end 123, and the length is the same as the length of the fluid diffuser 120. The vortex path is longer, which can improve the mixing effect.

[0065] As an alternative embodiment, the roughness of the inner wall of the additive flow channel 111 is different from that of the surface of the additive diffuser 110, which promotes the flow velocity difference of the coagulant on the surfaces of the additive flow channel 111 and the additive diffuser 110 and increases the vortex effect.

[0066] As an alternative embodiment, the roughness of the inner wall of the fluid flow channel 121 is different from that of the surface of the fluid diffuser 120, which also increases the vortex effect.

[0067] As an alternative embodiment, as Figure 2 shown, the additive flow channels 111 and the fluid flow channels 121 are arranged staggeredly. The additive flow channels 111 and the fluid flow channels 121 account for a relatively small proportion of the additive diffuser 110 and the fluid diffuser 120. The additive flow channels 111 and the fluid flow channels 121 are staggered and arranged at intervals. The coagulant is guided by multiple additive flow channels 111 to form multiple coagulant flow bundles with different sizes at intervals; similarly, the raw water is guided by multiple fluid flow channels 121 to form multiple water body flow bundles with different sizes at intervals. When the multiple coagulant flow bundles with different sizes collide with the multiple water body flow bundles with different sizes, the relatively small-size coagulant flow bundles are mixed and collided with the relatively large-size water body flow bundles; the relatively large-size coagulant flow bundles are mixed and collided with the relatively small-size water body flow bundles, so as to realize the rapid and uniform combination of the coagulant and the raw water, ensure that the coagulant is quickly dispersed and evenly distributed in the water, and improve the mixing effect of the coagulant and the raw water.

[0068] As an alternative embodiment, the additive flow channels 111 correspond one-to-one with the fluid flow channels 121. The coagulant is guided by multiple additive flow channels 111 and forms multiple coagulant flow bundles with different sizes at intervals; similarly, the raw water is guided by multiple fluid flow channels 121 and also forms multiple water body flow bundles with different sizes at intervals. When the multiple coagulant flow bundles with different sizes at intervals collide with the multiple water body flow bundles with different sizes at intervals, the relatively smaller coagulant flow bundles mix and collide with the relatively smaller water body flow bundles; the relatively larger coagulant flow bundles mix and collide with the relatively larger water body flow bundles, thereby achieving the rapid and uniform combination of the coagulant and the raw water, ensuring that the coagulant is quickly dispersed and evenly distributed in the water, and improving the mixing effect of the coagulant and the raw water.

[0069] As an alternative embodiment, the rotational direction of the fluid flow channel 121 is the same as ( Figure 2 ) or opposite to ( Figure 5 ) that of the additive flow channel 111. By adjusting the rotational direction, i.e., being the same or opposite, the turbulence between the coagulant and the raw water is increased, the rapid combination of the coagulant and the raw water is achieved, the collision probability is increased, and the mixing effect is improved.

[0070] As an alternative embodiment, the additive diffuser 110 and the fluid diffuser 120 are in the shape of a cone, or a hemisphere, or a semi-ellipsoid, or a horn shape, as shown in Figure 7-9 . The fluid diffusers 120 with different shapes affect the head loss of the raw water. The combination of the additive diffusers 110 with different shapes and the fluid diffusers 120 can form various mixing effects.

[0071] In a fluid, the flow disturbance and resistance of objects with different shapes mainly depend on their geometric characteristics and the Reynolds number, that is, the ratio of the inertial force to the viscous force when the fluid is flowing.

[0072] When the fluid diffuser 120 is in the shape of a semi-ellipsoid, the front end of the fluid diffuser 120 faces the water flow, the formed boundary layer is relatively smooth, and the eddy current generated at the tail is relatively small. The resistance of the semi-elliptical fluid diffuser 120 in the pipeline 200 is effectively reduced.

[0073] When the fluid diffuser 120 is in the shape of a cone or a horn shape, its tip faces the water flow, guiding the water flow to smoothly bypass the fluid diffuser 120, but the resistance increases with the increase of the cone angle. When the cone angle reaches 90°, the resistance is equivalent to that of a thin circular plate (the resistance coefficient is about 1.17). Larger flow separation may be caused at the tail of the fluid diffuser 120 (the middle part of the diffusion structure 100 or the tail of the cone), resulting in significant pressure difference resistance.

[0074] When the fluid diffuser 120 is in the shape of a hemisphere, although the hemisphere has good symmetry, its blunt body characteristics result in a relatively large flow separation area at the tail and a relatively high form resistance.

[0075] As an alternative embodiment, the additive diffuser 110 and the fluid diffuser 120 are integrally formed, or are formed separately as one body each.

[0076] As an alternative embodiment, the additive diffuser 110 and the fluid diffuser 120 are hollow shells or solid structures.

[0077] As an alternative embodiment, as Figure 10 shown, the additive release device 300 has a release port 310 and an additive delivery pipe. The additive delivery pipe includes a main pipe 320 and at least one branch pipe 330. When there are two or more branch pipes 330, they are connected to the main pipe 320 in sequence. The release port 310 is provided on the main pipe 320, and multiple additives can be released at one time.

[0078] As an alternative embodiment, when the pressure is released, the release port 310 faces the additive inlet end 112 of the additive diffuser 110 ( Figure 1 ), and the additive is in a liquid phase. When there is no pressure release, the release port 310 can face the additive diffuser 110, or can be in other directions such as downward, and the additive is in a liquid phase or a solid phase.

[0079] As an alternative embodiment, as shown in FIG. 1, when the release port 310 faces the additive diffuser 110, the diameter of the release port 310 is smaller than the maximum cross-sectional area of the diffusion structure 100.

[0080] As an alternative embodiment, the release port 310 is a flared port that gradually increases ( Figure 1 ), or a straight pipe port ( Figure 10 ), or a constricted port that gradually decreases. When the release port 310 is a flared port, it plays a role in the initial diffusion of the coagulant. When the release port 310 is a straight pipe port or a constricted port, the diameter of the release port 310 decreases, and the contact area between the ejected coagulant and the raw water is smaller, thereby reducing the fluid influence of the raw water on the coagulant, improving the stability of the coagulant, and also increasing the ejection flow rate of the coagulant, further improving the uniform diffusion rate of the coagulant in the pipeline 200.

[0081] As an alternative embodiment, as Figure 11 shown, the diffusion structure 100 is fixed in the pipeline 200 through a bracket 130. The pipeline 200 has a fluid inlet / outlet 210 and a fluid outlet / inlet 220. Figure 11 For the raw water flowing from the fluid diffuser 120 to the additive diffuser 110, the release direction of the additive is opposite to the flow direction of the raw water. 210 is the fluid inlet, and 220 is the fluid outlet. A plurality of spiral wall flow channels 230 are provided on the inner wall of the pipeline 200, and the rotation direction is the same as or opposite to that of the fluid flow channel 121.

[0082] As an alternative embodiment, as shown in FIGS. 12 and 13, a plurality of diffusion structures 100 are circumferentially and uniformly arranged inside the pipeline 200, and the outside of the pipeline 200 communicates a plurality of additive delivery pipes through an annular pipe 340. Under factors such as a larger pipeline diameter and a larger original water flow rate, the diffusion structures 100 can be appropriately increased to improve the mixing efficiency and mixing effect of the coagulant and the raw water.

[0083] As an alternative embodiment, the plurality of diffusion structures 100 are staggeredly distributed along the direction of fluid movement.

[0084] As an alternative embodiment, the plurality of diffusion structures 100 are distributed on the same cross-section perpendicular to the direction of fluid movement.

[0085] As an alternative embodiment, the angle α between the tangent of the middle edge of the additive diffuser 110 and the plane where the central axis of the diffusion structure 100 is located is not greater than 90°. When the angle α is less than 90° ( Figure 5 ), the velocity of the coagulant can be decomposed into V' that is opposite to the raw water flow in the horizontal direction and V" that flows towards the pipe wall in the longitudinal direction, improving the collision effect between the coagulant and the raw water. When the angle α is equal to 90° ( Figure 9 ), the coagulant flows towards the pipe wall. Assuming an ideal state without considering the influence of water body resistance, the ratio of the distance from the diffusion structure 100 to the pipe wall to the velocity of the coagulant is the diffusion time of the coagulant in the entire pipeline 200. That is to say, the coagulation effect can be quantitatively analyzed according to the pipe diameter, length, metering pump, and raw water pump body of the pipeline 200, which enables manufacturers and users to better design the pipeline mixer according to actual changes, facilitating the manufacture, management, and maintenance of equipment.

[0086] As an alternative embodiment, as shown in FIGS. 14 and Figure 15 , an additive delivery unit 400 is provided on the fluid diffuser 120. The additive delivery unit 400 includes a first additive delivery pipe 410, a second additive delivery pipe 420, and a flow guide cover 430. The first additive delivery pipe 410 communicates with the second additive delivery pipe 420. The second additive delivery pipe 420 is parallel to the raw water flow direction, closed at both ends, and provided with a plurality of openings 421 on the pipe wall. The size of the flow guide cover 430 gradually increases, and its large-size end faces the fluid diffuser 120. One end of the second additive delivery pipe 420 is fixed to the small-size end of the fluid diffuser 120, and the other end extends into the flow guide cover 430 and is fixed to the inner wall of its small-size end.

[0087] The coagulant is released through the openings 421 of the first additive delivery pipe 410 and the second additive delivery pipe 420. The raw water is first diffusely distributed for the first time by the flow guide cover 430, and is mixed and collided with the coagulant. Subsequently, the mixed liquid composed of the coagulant and the raw water is diffusely distributed and mixed in a vortex shape again in the fluid diffuser 120, and collides with the coagulant passing through the additive diffuser 110 in the middle of the diffusion structure 100 for further mixing. Through multiple diffusional mixing processes between the coagulant and the raw water, the mixing effect of the coagulant and the raw water is significantly improved. The flow guide cover 430 gradually increases in size from one end to the other end, which can reduce the head loss of the raw water.

[0088] As an alternative embodiment, as Figure 15-17 shown, the flow guide cover 430 is a hollow cone, and its outer wall is straight, convex outward or concave inward.

[0089] As an alternative embodiment, the fluid flow channel 121 is arranged on the surface of the fluid diffuser 120, see Figure 2 .

[0090] As an alternative embodiment, the fluid flow channel 121 is arranged inside the fluid diffuser 120.

[0091] As an alternative embodiment, the additive flow channel 111 is arranged on the surface of the additive diffuser 110, see Figure 2 .

[0092] As an alternative embodiment, the additive flow channel 111 is arranged inside the additive diffuser 110.

[0093] As an alternative embodiment, as Figure 18-19 shown, when the additive flow channel 111 is arranged on the surface of the additive diffuser 110, a flow stabilizing cover 500 is sleeved on the additive diffuser 110. One end of the flow stabilizing cover 500 is communicated with the release port 310, and the other end is circumferentially provided with a liquid outlet 510 corresponding to the end of the additive flow channel 111, or the end of the additive flow channel 111 is exposed. The flow stabilizing cover 500 can effectively avoid the influence of complex hydraulics on the coagulant, significantly improve the flow stability of the coagulant on the additive diffuser 110, and thus greatly shorten the mixing time of the coagulant and the raw water, effectively improving the mixing efficiency and mixing speed.

[0094] As an alternative embodiment, the small-size end and the large-size end are relative. For example, the small-size end can be at the head end of the additive diffuser 110 / fluid diffuser 120 / flow guide cover 430, or at the middle position. Similarly, the large-size end can be at the tail end of the additive diffuser 110 / fluid diffuser 120 / flow guide cover 430, or at the middle position.

[0095] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fluid mixing device for a water treatment process, comprising a space (200) for fluid flow, a diffusion structure (100) and an additive release device (300), wherein the diffusion structure (100) and the additive release device (300) are arranged in the space (200), the diffusion structure (100) comprises an additive diffuser (110) and a fluid diffuser (120) arranged opposite to each other, the sizes of the additive diffuser (110) and the fluid diffuser (120) gradually increase towards each other, and the device is characterized in that: The additive diffuser (110) is provided with a plurality of spiral additive flow channels (111) extending toward the fluid diffuser (120); the additive release device (300) releases the additive to the additive diffuser (110) under pressure so that the additive diffuser diffuses from the small-sized end to the large-sized end of the additive diffuser (110); and the fluid diffuser (120) is provided with a plurality of spiral fluid flow channels (121) extending toward the additive diffuser (110).

2. The fluid mixing device for water treatment process according to claim 1, characterized in that: The small-sized end of the additive diffuser (110) is defined as an additive inlet end (112), and the large-sized end is defined as an additive outlet end (113). Each additive flow channel (111) extends from the additive inlet end (112) to the additive outlet end (113), and the length is the same as that of the additive diffuser (110).

3. The fluid mixing device for water treatment process according to claim 2, characterized in that: The additive flow channel (111) gradually increases in depth from the additive inlet end (112) to the additive outlet end (113), or gradually increases in width, or gradually increases in both depth and width.

4. The fluid mixing device for water treatment process according to claim 1, characterized in that: The length of each fluid flow channel (121) is the same as the length of the fluid diffuser (120).

5. The fluid mixing device for water treatment process according to claim 1, characterized in that: The additive flow channel (111) and the fluid flow channel (121) are staggered, or the additive flow channel (111) and the fluid flow channel (121) correspond one to one.

6. The fluid mixing device for water treatment process according to claim 1, characterized in that: The rotation direction of the fluid flow channel (121) is the same as or opposite to that of the additive flow channel (111).

7. The fluid mixing device for water treatment process according to claim 1, characterized in that: The additive diffuser (110) and the fluid diffuser (120) are in the shape of a cone, a hemisphere, a semi-ellipsoid, or a trumpet.

8. The fluid mixing device for water treatment process according to claim 1, characterized in that: A plurality of spiral wall flow channels (230) are arranged on the inner wall of the space (200), and the rotation direction is the same as or opposite to that of the fluid flow channel (121).

9. The fluid mixing device for water treatment process according to claim 1, characterized in that: The additive release device (300) comprises a release port (310) and an additive delivery pipe, wherein the additive delivery pipe comprises a main pipe (320) and at least one branch pipe (330), and when there are two or more branch pipes (330), they are sequentially connected to the main pipe (320), and the release port (310) is arranged on the main pipe (320), and the release port (310) faces the additive diffuser (110).

10. The fluid mixing device for water treatment process according to claim 9, characterized in that: The release port (310) is a gradually increasing expansion port, or a straight pipe port, or a gradually decreasing contraction port.

11. The fluid mixing device for water treatment process according to claim 9, characterized in that: A plurality of diffusion structures (100) are evenly arranged in the circumferential direction within the space (200), and a plurality of additive delivery pipes are connected outside the space (200) via a ring pipe (340).

12. The fluid mixing device for water treatment process according to claim 11, characterized in that: The plurality of diffusion structures (100) are staggeredly distributed along the moving direction of the fluid, or distributed on the same cross section perpendicular to the moving direction of the fluid.

13. The fluid mixing device for water treatment process according to claim 1, characterized in that: The angle between the tangent line of the middle edge of the additive diffuser (110) and the plane where the central axis of the diffusion structure (100) is located is not greater than 90°.

14. The fluid mixing device for water treatment process according to claim 1, characterized in that: The fluid diffuser (120) is provided with an additive delivery unit (400), the additive delivery unit (400) comprising a first additive delivery tube (410), a second additive delivery tube (420) and a flow guide cover (430), the first additive delivery tube (410) is connected to the second additive delivery tube (420), the second additive delivery tube (420) is parallel to the fluid flow direction, both ends are closed, and a plurality of openings (421) are arranged on the tube wall, the flow guide cover (430) is gradually enlarged in size, and its large-size end is close to the fluid diffuser (120), one end of the second additive delivery tube (420) is fixed to the small-size end of the fluid diffuser (120), and the other end extends into the flow guide cover (430) and is fixed to the inner wall of the small-size end.

15. The fluid mixing device for water treatment process according to claim 14, characterized in that: The deflector (430) is a hollow cone, and the outer wall is straight or convex outward or concave inward.

16. The fluid mixing device for water treatment process according to claim 1, characterized in that: The fluid flow channel (121) is arranged on the surface or inside of the fluid diffuser (120).

17. The fluid mixing device for water treatment process according to claim 9, characterized in that: The additive flow channel (111) is arranged on the surface or inside of the additive diffuser (110).

18. The fluid mixing device for water treatment process according to claim 17, characterized in that: When the additive flow channel (111) is arranged on the surface of the additive diffuser (110), a flow stabilizer (500) is sleeved on the additive diffuser (110), one end of the flow stabilizer (500) is connected to the release port (310), and the other end is circumferentially arranged with a liquid outlet (510) corresponding to the end of the additive flow channel (111), or the end of the additive flow channel (111) is exposed.

Images