Diffusion box and slurry mixing system with same

Abstract

The utility model provides a diffusion box and a slurry mixing system with the diffusion box. The diffusion box comprises a shell and a flow guide plate. A diffusion cavity is formed in the shell, the shell is provided with a feeding port and a discharging port which are arranged in a spaced mode, and the feeding port is located in the periphery of the shell. The flow guide plate is arranged in the diffusion cavity and located between the feeding port and the discharging port, and at least part of the flow guide plate is in butt joint with the feeding port; the guide plate is connected with the inner wall of the shell and provided with an inlet end and an outlet end which are arranged at intervals. And in the extending direction from the inlet end to the outlet end, the flow guide plate extends in the peripheral direction of the inner wall of the shell. By adopting the technical scheme provided by the utility model, the problem of poor slurry mixing effect of the diffusion box in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cement slurry preparation equipment, in particular to a diffusion box and a slurry mixing system having the same. Background Art

[0002] At present, the slurry mixing system in the prior art is the main equipment for preparing cement slurry. It often uses gas to transport dry ash into the mixed liquid, and water, dry ash, and mud liquid are separated and mixed to form cement slurry. In the process of forming cement slurry, it is necessary to discharge gas from the mixed liquid to improve the quality of cement slurry. The diffusion box is often the main component of the separation and mixing process of water, dry ash, and mud liquid in the slurry mixing system, and its performance often directly affects the separation effect, slurry mixing quality and slurry mixing efficiency.

[0003] However, in the existing diffusion box, the gas, solid and liquid in the mixed liquid are often not completely separated, and some dry ash is difficult to mix into the cement slurry, which leads to poor overall slurry mixing effect of the diffusion box. Utility Model Content

[0004] The main purpose of the utility model is to provide a diffusion box and a slurry mixing system having the same, so as to solve the problem that the slurry mixing effect of the diffusion box in the prior art is poor.

[0005] In order to achieve the above object, according to one aspect of the utility model, a diffusion box is provided, comprising:

[0006] The shell has a diffusion cavity, and the shell has a feed port and a discharge port that are spaced apart, and the feed port is located at the periphery of the shell;

[0007] A guide plate is arranged in the diffusion chamber, the guide plate is located between the feed port and the discharge port, and at least a portion of the guide plate is butted against the feed port; the guide plate is connected to the inner wall of the shell, and the guide plate has an inlet end and an outlet end that are spaced apart;

[0008] Wherein, along the extension direction from the inlet end to the outlet end, the guide plate extends along the peripheral direction of the inner wall of the shell.

[0009] Furthermore, the inner wall of the shell is an arc-shaped wall, and the guide plate is an arc-shaped plate;

[0010] The arrangement height of the arc-shaped plate is the same along the extension direction from the inlet end to the outlet end; or the arrangement height of the arc-shaped plate gradually decreases along the extension direction from the inlet end to the outlet end.

[0011] Furthermore, the guide plate is a spiral plate.

[0012] Furthermore, the diffusion box also includes: an exhaust pipe inserted on the shell, at least part of the exhaust pipe is located in the diffusion chamber, the guide plate has a first connecting side and a second connecting side arranged opposite to each other, the first connecting side is connected to the inner wall of the shell, and the second connecting side is connected to the outer wall of the exhaust pipe.

[0013] Further, at least part of the exhaust pipe is spaced apart from the inner wall of the shell, and the second connecting side is arranged around the outer wall periphery of the exhaust pipe; and / or, the exhaust pipe has a connected air inlet and exhaust port, the air inlet is located in the diffusion chamber, the exhaust port is located outside the diffusion chamber, and the air inlet is located below the guide plate.

[0014] Further, along the extension direction from the feed port to the discharge port, the flow cross-section area of ​​at least part of the shell gradually decreases; and / or, the discharge port is an inverted cone port.

[0015] Furthermore, the shell includes a guide section and a tapered section that are interconnected, the tapered section is located below the guide section, the feed port is located at the periphery of the guide section, and the discharge port is located at one end of the tapered section away from the guide section.

[0016] Furthermore, the diffusion box also includes: a feed pipe, which is arranged outside the diffusion chamber, the feed pipe is arranged at the feed port, the feed pipe is connected to the shell, and the extension direction of the feed pipe extends along the tangential direction of the feed port.

[0017] Furthermore, the feed pipe is a square pipe, and the diffusion chamber is an arc-shaped chamber.

[0018] According to another aspect of the utility model, a slurry mixing system is provided, comprising: a tank body; and the diffusion box provided above, wherein the diffusion box is arranged in the tank body.

[0019] By applying the technical solution of the utility model, a guide plate is arranged in the diffusion box. After the material enters the diffusion box, the movement of the material is guided by the guide plate. The material moves in the diffusion chamber along the peripheral direction of the inner wall of the shell on the guide plate, that is, the movement direction of the material is always tangent to the inner wall of the shell, thereby producing a centrifugal effect. Due to the different centrifugal forces exerted on different media densities, the gas, liquid, and solid particles in the material are separated under the centrifugal effect, so that the solid and liquid are attached to the inner wall surface of the shell, and the gas is close to the middle of the shell, thereby reducing the number of solid particles carried by the gas, so that the solid entering through the feed port can be retained in the shell in large quantities for mixing, thereby improving the mixing effect of the solid particles being received by the liquid to form cement slurry, thereby also improving the mixing efficiency. Therefore, the technical solution provided by the utility model solves the problem of poor mixing effect of the diffusion box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0021] Figure 1 A cross-sectional view of a slurry mixing system provided according to an embodiment of the utility model in a cross-sectional direction is shown;

[0022] Figure 2 A cross-sectional view of a slurry mixing system provided according to an embodiment of the utility model in another cross-sectional direction is shown;

[0023] Figure 3 A schematic structural diagram of a slurry mixing system provided according to an embodiment of the utility model is shown.

[0024] The above drawings include the following reference numerals:

[0025] 10. Shell; 11. Feed inlet; 12. Discharge outlet; 13. Guide section; 14. Conical section;

[0026] 20. guide plate; 21. inlet end; 22. outlet end; 23. first connection side; 24. second connection side;

[0027] 30. Exhaust pipe; 31. Air inlet; 32. Exhaust port;

[0028] 40. feed pipe; 50. flow guide; 60. external pipeline;

[0029] 200, tank body; 300, circulation pump; 400, mixer; 401, circulation pipeline; 402, solid particle pipeline. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] like Figure 1 to Figure 2 As shown, one embodiment of the utility model provides a diffusion box, which includes a shell 10 and a guide plate 20. A diffusion chamber is formed inside the shell 10, and the shell 10 has a feed port 11 and a discharge port 12 that are spaced apart, and the feed port 11 is located at the periphery of the shell 10. The guide plate 20 is arranged in the diffusion chamber, and the guide plate 20 is located between the feed port 11 and the discharge port 12, and at least a part of the guide plate 20 is connected to the feed port 11; the guide plate 20 is connected to the inner wall of the shell 10, and the guide plate 20 has an inlet end 21 and an outlet end 22 that are spaced apart. Among them, along the extension direction from the inlet end 21 to the outlet end 22, the guide plate 20 extends along the peripheral direction of the inner wall of the shell 10.

[0034] By applying the technical solution provided in this embodiment, a guide plate 20 is set in the diffusion box. After the material enters the diffusion box, the movement of the material is guided by the guide plate 20. The material moves in the diffusion chamber along the peripheral direction of the inner wall of the shell 10 on the guide plate 20, that is, the movement direction of the material is always tangent to the inner wall of the shell 10, thereby producing a centrifugal effect. Due to the different centrifugal forces exerted on different medium densities, the gas, liquid, and solid particles in the material are separated under the centrifugal action, so that the solid and liquid are attached to the inner wall surface of the shell 10, and the gas is close to the middle of the shell 10, thereby reducing the number of solid particles carried by the gas, so that the solid entering through the feed port 11 can be retained in the shell 10 in large quantities for mixing, thereby improving the mixing effect of the solid particles being received by the liquid to form cement slurry, thereby also improving the mixing efficiency. Therefore, the diffusion box provided by this embodiment can solve the problem of poor mixing effect of the diffusion box in the prior art.

[0035] Specifically, the shell 10 in this embodiment is a cylindrical structure, and “the periphery of the shell 10 ” can be understood to correspond to the side wall of the cylindrical structure.

[0036] In this embodiment, the inner wall of the shell 10 is an arc-shaped wall, and the guide plate 20 is an arc-shaped plate. Since the moving direction of the material is always tangent to the inner wall of the shell 10, when the inner wall of the shell 10 is an arc-shaped wall, under the guidance of the guide plate 20, the material performs a quasi-circular motion in the cross section of the shell 10, so that the change of the moving speed of the material is more uniform, thereby increasing the smoothness of the material movement, making the separation effect of the gas, liquid, and solid particles in the material better, thereby better avoiding the gas from taking away more solid particles, further improving the efficiency of solid particles being received by the liquid to form cement slurry, and then improving the mixing efficiency of the diffusion box.

[0037] In this embodiment, the arc plates are arranged at the same height along the extension direction from the inlet end 21 to the outlet end 22. In this way, after the arc plates guide the movement direction of the material, the material entering below the arc plates has an initial velocity tangent to the inner wall of the shell 10, so that this part of the material can also produce a centrifugal effect, thereby effectively improving the separation effect of gas, liquid, and solid particles in the material, and further improving the effect and efficiency of solid particles being received by the liquid to form cement slurry.

[0038] In another embodiment of the utility model, the height of the arc plate is gradually reduced along the extension direction from the inlet end 21 to the outlet end 22. In this way, when the arc plate guides the movement direction of the material, the gravity of the material itself does work, so that the movement speed of the material increases, thereby further improving the centrifugal force when the material moves, thereby improving the separation effect of gas, liquid, and solid particles in the material, and improving the effect of solid particles being received by liquid to form cement slurry, thereby improving the mixing effect and efficiency of the diffusion box.

[0039] In this embodiment, the guide plate 20 is a spiral plate. In this way, under the action of the guide plate 20, the material moves in a spiral in the shell 10, thereby increasing the movement path of the material, thereby increasing the path for centrifuging the material, and increasing the time for centrifuging the material, thereby improving the separation effect of gas, liquid, and solid particles in the material, and accelerating the process of solid particles being received by the liquid to form cement slurry.

[0040] In this embodiment, the diffusion box also includes an exhaust pipe 30, which is inserted into the shell 10. At least part of the exhaust pipe 30 is located in the diffusion chamber. The guide plate 20 has a first connecting side 23 and a second connecting side 24 that are relatively arranged. The first connecting side 23 is connected to the inner wall of the shell 10, and the second connecting side 24 is connected to the outer wall of the exhaust pipe 30.

[0041] With such a setting, the gas in the diffusion box is discharged through the exhaust pipe 30, preventing the gas in the diffusion box from entering the cement slurry, thereby improving the mixing efficiency of the diffusion box and improving the quality of the cement slurry product. In addition, the above setting can further improve the structural setting strength of the guide plate 20, ensuring that the guide plate 20 can stably guide the flow. In addition, the above setting can also facilitate the restriction of the material on the guide plate 20, preventing the material on the guide plate 20 from falling from the position of the second connection side 24 during the diversion process.

[0042] In this embodiment, at least part of the exhaust pipe 30 is spaced from the inner wall of the shell 10, and the second connection side 24 is arranged around the outer wall periphery of the exhaust pipe 30. In this way, a spiral flow channel is formed between the exhaust pipe 30, the guide plate 20 and the inner wall of the diffusion box, so that the material always moves around the spiral flow channel, improving the uniformity of material movement at each position, and preventing the material on the spiral plate near the center of the diffusion box from having a slow movement speed or even accumulation due to insufficient viscosity, thereby ensuring the separation effect of gas, liquid, and solid particles at each position, thereby improving the efficiency of solid particles being received by liquid to form cement slurry. The above-mentioned structural setting can make the material always move around the spiral flow channel, improving the uniformity of material movement at each position, thereby ensuring the separation effect of gas, liquid, and solid particles at each position, thereby improving the efficiency of solid particles being received by liquid to form cement slurry.

[0043] In this embodiment, the exhaust pipe 30 has an air inlet 31 and an exhaust port 32 that are connected. The air inlet 31 is located in the diffusion chamber, the exhaust port 32 is located outside the diffusion chamber, and the air inlet 31 is located below the guide plate 20. In this way, a spiral flow channel is formed above the guide plate 20, between the exhaust pipe 30, the guide plate 20 and the inner wall of the diffusion box, and the gas, liquid and solid particles in the material are separated under the action of centrifugal force, and the solid particles are mixed into the cement slurry, while the gas needs to enter the exhaust pipe 30 from the air inlet 31 below the guide plate 20, thereby reducing the number of solid particles brought out when the gas flows out, thereby increasing the number of solid particles received by the liquid, improving the utilization rate of the solid particles, and further improving the slurry mixing effect of the diffusion box.

[0044] Specifically, the feed port 11 in this embodiment is located above the discharge port 12, so that the material entering through the feed port 11 can be effectively mixed in the diffusion chamber and then discharged from the discharge port 12. The air inlet 31 is arranged below the feed port 11, which can prevent the gas in the material entering through the air inlet 31 from being directly discharged through the air inlet 31, thereby reducing the situation where the gas carries more solid particles and is discharged from the air inlet 31, resulting in more solid particle losses.

[0045] In this embodiment, the area of ​​at least part of the flow cross section of the shell 10 gradually decreases along the extension direction from the feed port 11 to the discharge port 12. In this way, the axial velocity of the material during the separation process can be reduced, and the excessive axial velocity of the material can be prevented from causing too much gas to enter the discharge port 12, resulting in excessive gas in the cement slurry. Thus, the mixing efficiency of the diffusion box is improved while the quality of the cement slurry product is improved.

[0046] It should be noted that “along the extension direction from the feed port 11 to the discharge port 12 ” can be understood as the extension direction of the interval arrangement from the feed port 11 to the discharge port 12 .

[0047] In this embodiment, the discharge port 12 is an inverted cone-shaped port. The guide plate 20 guides the material to move along the tangential direction of the inner wall of the diffusion box, and under the action of gravity, the material has a high tangential velocity when entering the discharge port 12. After entering the inverted cone-shaped discharge port 12, the tangential velocity of the material is gradually converted into a radial velocity, the tangential velocity of the material decreases, and the radial velocity increases, thereby accelerating the efficiency of solid particles in the material being received by the liquid to form cement slurry.

[0048] It should be noted that the discharge port 12 in this embodiment is a symmetrical port, and after the discharge port 12 is cut along the direction of the symmetry plane, the remaining discharge port 12 forms an inverted cone. Along the discharge direction of the discharge port 12, the flow cross section of the discharge port 12 gradually increases.

[0049] Specifically, a guide piece 50 is also provided at the outlet of the diffusion box. When the solid-liquid mixture passes through the guide piece 50, the tangential velocity of the material continues to decrease due to the guiding effect of the guide piece 50. This continuous speed change can significantly improve the efficiency of solid particles being received by the liquid to form cement slurry, and at the same time, the material is evenly dispersed around the diffusion box after passing through the guide plate 20, thereby increasing the mixing effect.

[0050] In this embodiment, the shell 10 includes a guide section 13 and a tapered section 14 which are interconnected. The tapered section 14 is located below the guide section 13 , the feed port 11 is located at the periphery of the guide section 13 , and the discharge port 12 is located at one end of the tapered section 14 away from the guide section 13 .

[0051] Specifically, along the extending direction from the feed port 11 to the discharge port 12 , the flow cross section area of ​​the tapered section 14 gradually decreases.

[0052] With such a configuration, in the guide section 13, the gas, liquid, and solid particles in the material are initially separated under the action of centrifugal force and then enter the conical section 14. In the conical section 14, the flow velocity of the material (here the material is mainly mud) can be decomposed into axial, radial, and tangential velocities, and the centrifugal force related to separation is mainly determined by the tangential velocity. There is the following relationship between the tangential velocity u and the radius r of the fluid inside the conical tube: n = constant, n is the velocity distribution index, generally in the range of 0.5 to 0.9. That is, inside the conical section 14, the tangential velocity of the material gradually increases from top to bottom, thereby increasing the centrifugal force of various media in the material, and the gas, liquid, and solid particles in the material are further separated under the action of centrifugal force, thereby increasing the efficiency of solid particles mixing into the slurry to form cement slurry. In addition, liquid is distributed on the conical surface of the conical section 14, so that the area of ​​gas escaping from the liquid is increased, and the area of ​​solid particles received by the liquid is increased, thereby further improving the separation of solid particles and gas and the efficiency of solid particles being received by the liquid to form cement slurry.

[0053] Specifically, the discharge port 12 at the end of the conical section 14 away from the guide section 13 is connected to the tank body 200, and the material is further mixed and stirred in the tank body 200 to achieve slurry mixing. The reduction in the diameter of the lower part of the conical section 14 partially converts the axial velocity component and the radial velocity component of the slurry inside the diffusion box into the tangential velocity component. The reduction in the axial velocity component reduces the gas that follows the liquid mixing and enters the tank body 200. At the same time, the reduction in the axial velocity slightly increases the liquid level inside the conical section 14. The slightly increased liquid level increases the resistance of the gas to move downward, which is conducive to reducing the gas inside the diffusion box from entering the tank body 200, thereby reducing the gas that enters the mud circulation from the diffusion box and reducing the impact on the slurry mixing quality and slurry mixing efficiency.

[0054] In this embodiment, the diffusion box further includes a feed pipe 40, which is arranged outside the diffusion chamber. Specifically, the feed pipe 40 is arranged at the feed port 11 and connected to the shell 10, and the extension direction of the feed pipe 40 extends along the tangential direction of the feed port 11. In this way, since the extension direction of the feed pipe 40 extends along the tangential direction of the feed port 11, the material in the feed pipe 40 has an initial velocity tangent to the diffusion box shell 10 when entering the internal cavity of the diffusion box, so as to guide the movement direction of the material through the guide plate 20 and centrifuge the material.

[0055] In this embodiment, the feed pipe 40 is a square tube, and the diffusion cavity is an arc-shaped cavity. In the process of using the external pipeline 60 to transport materials into the feed pipe 40, the cross section of the external pipeline 60 is often circular, but in this embodiment, after the cross section of the feed pipe 40 is set to be square, when the material enters the feed pipe 40, its flow form changes from circular to square. The change in flow form causes the media inside the material to squeeze each other, thereby achieving mixing of various media in the material, thereby improving the efficiency of solid particles being received by the liquid and forming cement slurry.

[0056] like Figures 1 to 3 As shown, another embodiment of the utility model provides a slurry mixing system, which includes a tank body 200 and a diffusion box provided in the above embodiments, and the diffusion box is arranged in the tank body 200.

[0057] By using the slurry mixing system provided in this embodiment, the gas, liquid, and solid particles in the material in the diffusion box are separated under the action of centrifugal force, and after the solid particles are received by the liquid to form cement slurry, the material enters the tank 200 of the slurry mixing system for mixing again, thereby improving the slurry mixing efficiency. In addition, the liquid in the diffusion box seals the separated gas, thereby reducing the gas entering the slurry mixing system, thereby improving the quality of the cement slurry product.

[0058] like Figure 3 As shown, the slurry mixing system of the utility model further includes a circulation pump 300, a mixer 400, a circulation pipeline 401 and a solid particle pipeline 402. Among them, the circulation pipeline 401 is connected to the bottom of the slurry mixing system and the mixer 400 respectively, and the circulation pump 300 is arranged on the circulation pipeline 401. The slurry mixing system transports the mixed liquid in the tank body 200 to the mixer 400 through the circulation pipeline 401 through the circulation pump 300, and mixes it with the solid particles transported by the gas through the solid particle pipeline 402. The gas and liquid are separated inside the diffusion box, and the gas is discharged from the exhaust pipe 30. The solid particles and liquid are mixed to initially produce cement slurry. The material treated by the diffusion box flows from the discharge port 12 into the tank body 200 of the slurry mixing system, and is stirred and mixed, thereby circulating, thereby realizing the preparation process of cement slurry.

[0059] From the above description, it can be seen that the above embodiment of the utility model achieves the following technical effects: the gas, liquid, and solid particles in the material in the diffusion box are separated under the action of centrifugal force, and the solid particles are received by the liquid to form cement slurry, thereby improving the mixing efficiency. In addition, after the diffusion box separates the gas in the material, the liquid in the diffusion box seals the separated gas, thereby preventing the gas from re-entering the cement slurry, thereby improving the quality of the cement slurry product.

[0060] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0061] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0062] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0063] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A diffusion box, characterized in that: include: A shell (10), the shell (10) having a diffusion cavity, the shell (10) having a feed inlet (11) and a discharge outlet (12) arranged at intervals, the feed inlet (11) being located at the periphery of the shell (10); a guide plate (20) disposed in the diffusion chamber, the guide plate (20) being located between the feed port (11) and the discharge port (12), and at least a portion of the guide plate (20) being butted against the feed port (11); the guide plate (20) being connected to an inner wall of the shell (10), and having an inlet end (21) and an outlet end (22) which are spaced apart; Wherein, along the extension direction from the inlet end (21) to the outlet end (22), the guide plate (20) extends along the peripheral direction of the inner wall of the shell (10).

2. The diffusion box according to claim 1, characterized in that: The inner wall of the shell (10) is an arc-shaped wall, and the guide plate (20) is an arc-shaped plate; Wherein, along the extending direction from the inlet end (21) to the outlet end (22), the arrangement height of the arc-shaped plates is the same; or, Along the extending direction from the inlet end (21) to the outlet end (22), the setting height of the arc-shaped plate gradually decreases.

3. The diffusion box according to claim 1, characterized in that: The guide plate (20) is a spiral plate.

4. The diffusion box according to claim 1, characterized in that: The diffusion box also includes: An exhaust pipe (30) is inserted into the shell (10), at least a portion of the exhaust pipe (30) is located in the diffusion chamber, and the guide plate (20) has a first connecting side (23) and a second connecting side (24) that are arranged opposite to each other, the first connecting side (23) is connected to the inner wall of the shell (10), and the second connecting side (24) is connected to the outer wall of the exhaust pipe (30).

5. The diffusion box according to claim 4, characterized in that: At least a portion of the exhaust pipe (30) is spaced apart from the inner wall of the housing (10), and the second connection side (24) is arranged around the periphery of the outer wall of the exhaust pipe (30); and / or, The exhaust pipe (30) has an air inlet (31) and an exhaust port (32) which are connected, the air inlet (31) being located inside the diffusion chamber, the exhaust port (32) being located outside the diffusion chamber, and the air inlet (31) being located below the guide plate (20).

6. The diffusion box according to claim 1, characterized in that: Along the extension direction from the feed port (11) to the discharge port (12), the flow cross-section area of ​​at least part of the shell (10) gradually decreases; and / or, The discharge port (12) is an inverted cone-shaped port.

7. The diffusion box according to claim 1, characterized in that: The shell (10) comprises a guide section (13) and a conical section (14) which are interconnected, the conical section (14) being located below the guide section (13), the feed port (11) being located at the periphery of the guide section (13), and the discharge port (12) being located at one end of the conical section (14) away from the guide section (13).

8. The diffusion box according to claim 1, characterized in that: The diffusion box also includes: A feed pipe (40) is arranged outside the diffusion chamber, the feed pipe (40) is arranged at the feed port (11), the feed pipe (40) is connected to the shell (10), and the extension direction of the feed pipe (40) extends along the tangential direction of the feed port (11).

9. The diffusion box according to claim 8, characterized in that: The feed pipe (40) is a square tube, and the diffusion chamber is an arc-shaped chamber.

10. A slurry mixing system, characterized in that: include: Tank (200); The diffusion box according to any one of claims 1 to 9, wherein the diffusion box is arranged in the tank body (200).

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