Mixing impeller and pulping equipment

Abstract

This invention discloses a mixing impeller and a pulping device. The mixing impeller includes an impeller body with a cavity extending from its bottom end towards its top end. A flow-through hole communicating with the cavity is formed on the side wall of the impeller body. The impeller body can rotate around its own axis. During rotation, solid material is conveyed from top to bottom along the external flow channel of the impeller body; liquid material is conveyed from bottom to top through the cavity of the impeller body. The liquid material flows through the cavity and exits through the flow-through hole on the side wall of the impeller body, mixing with the solid material. The cavity and flow-through hole on the impeller body raise the liquid level, thereby increasing the mixing interface height between the solid and liquid materials and further improving the mixing efficiency.

Description

Technical Field

[0001] This invention relates to the field of pulping equipment technology, specifically to a mixing impeller and pulping equipment. Background Technology

[0002] Pulping equipment is widely used in pharmaceutical, food, and chemical industries. In the preparation stage, it fully mixes liquids and solids to obtain a pre-mixed mixture, thereby improving the efficiency of subsequent processing.

[0003] In existing equipment, the dispersion and mixing of solids and liquids are integrated into the same device. However, due to the low interface between solids and liquids in the existing structure, the contact area between solids and liquids is small and the contact time is short. This results in low mixing degree and low mixing efficiency, which affects the pulping efficiency. Summary of the Invention

[0004] Therefore, the present invention aims to overcome the defects of low solid-liquid mixing degree and slow mixing efficiency caused by low solid-liquid interface in the prior art, and thus provides a mixing impeller and pulping equipment.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] A hybrid impeller includes: an impeller body, wherein a cavity extending from the bottom end of the impeller body toward the top end is provided, and a flow passage communicating with the cavity is provided on the side wall of the impeller body.

[0007] According to some embodiments of the present invention, there are multiple flow holes, which are spaced apart around the sidewall of the impeller body, and the flow holes are located on the sidewall near the top of the impeller body.

[0008] According to some embodiments of the present invention, the flow passage is inclined from the top end of the impeller body to the bottom end of the impeller body along the direction from the inner wall to the outer wall of the impeller body.

[0009] According to some embodiments of the present invention, a baffle is provided above the flow hole of the impeller body, and the baffle is inclined from the top end of the impeller body toward the bottom end.

[0010] According to some embodiments of the present invention, the flow passage is arranged radially along the impeller body.

[0011] According to some embodiments of the present invention, the flow passage is inclined from the bottom end of the impeller body toward the top end of the impeller body along the direction from the inner wall to the outer wall of the impeller body.

[0012] According to some embodiments of the present invention, the flow passages are inclined from the inside out and toward the same side in the direction opposite to the rotation direction of the impeller body.

[0013] According to some embodiments of the present invention, the flow passage is a circular hole, an elliptical hole, a polygonal hole, or a flat hole.

[0014] According to some embodiments of the present invention, the impeller body includes a cylindrical section and a frustum-shaped section smoothly connected to the cylindrical section, the large end of the frustum-shaped section being connected to the cylindrical section, and the cavity penetrating the cylindrical section and extending into the frustum-shaped section.

[0015] According to some embodiments of the present invention, the flow passage is provided on the side wall of the frustum section.

[0016] According to some embodiments of the present invention, the cavity is an annular cavity, which is coaxially arranged with the impeller body, or the cavity includes a plurality of spaced sub-cavities, which together constitute the cavity.

[0017] According to some embodiments of the present invention, the outer wall of the impeller body is provided with a plurality of blades spaced apart, and at least one flow passage is provided in the area between two adjacent blades.

[0018] According to some embodiments of the present invention, the outer wall of the impeller body is provided with a plurality of blades spaced apart, and the two ends of the baffle abut against the blades on the adjacent sides.

[0019] The present invention also proposes a pulping device, comprising: a housing, wherein the mixing impeller is disposed in the housing.

[0020] The technical solution of this invention has the following advantages:

[0021] 1. The mixing impeller provided by this invention has an impeller body that can rotate around its own axis. During rotation, solid materials, such as powder, are conveyed from top to bottom along the external flow channel of the impeller body; liquid materials are conveyed from bottom to top through the cavity of the impeller body. The liquid materials flow through the cavity and out through the flow holes opened on the side wall of the impeller body, mixing with the solid materials. The cavity and flow holes on the impeller body raise the liquid level of the liquid materials, thereby increasing the mixing interface height between the solid and liquid materials and further improving the mixing efficiency.

[0022] 2. The mixing impeller provided by the present invention has flow holes disposed on the side wall at the top of the impeller body. Liquid material is conveyed from bottom to top, flows through the cavity and then flows out through the flow holes, that is, out through the top side wall of the impeller, thereby improving the mixing interface between solid and liquid materials. Multiple flow holes are arranged at intervals. When the impeller body rotates around its own axis, the liquid material in the cavity is thrown out through the multiple flow holes by centrifugal force, which plays a dispersing role on the liquid material and further improves the mixing efficiency of solid and liquid materials.

[0023] 3. The mixing impeller provided by this invention has its flow holes inclined from the top to the bottom of the impeller body along the direction from the inner wall to the outer wall. This creates an inclined surface at the interface between the solid and liquid materials, thereby increasing the mixing contact area between the solid and liquid, improving the mixing efficiency, accelerating the downward conveying speed of the solid, reducing the probability of backflow, improving the mixing quality of the solid and liquid, and increasing the pulping efficiency. Furthermore, it can prevent agglomeration caused by the mixing of solid and liquid materials from clogging the flow holes and affecting the mixing efficiency.

[0024] 4. The mixing impeller provided by the present invention, when the flow passage is inclined from the bottom end to the top end of the impeller body, or arranged radially along the impeller body, a baffle is provided above the flow passage, and the baffle is inclined from the top end to the bottom end of the impeller body, so that when the solid material flows from top to bottom, it flows away from the outer wall of the impeller under the obstruction of the baffle, thereby avoiding the agglomeration generated when the solid material and liquid material are mixed and causing blockage of the flow passage, thus affecting the mixing efficiency.

[0025] 5. The mixing impeller provided by the present invention has a flow hole that is inclined from the bottom end to the top end of the impeller body along the direction from the inner wall to the outer wall of the impeller body, thereby increasing the height of the mixing interface between the liquid material and the solid material and further improving the mixing efficiency.

[0026] 6. The mixing impeller provided by the present invention has multiple sub-cavities forming a cavity. When the impeller body rotates, the liquid material rotates with the impeller in the multiple sub-cavities. During the rotation, the liquid material is dispersed under the action of centrifugal force, resulting in higher dispersion of the liquid material flowing out of the flow hole and higher mixing efficiency of solid and liquid materials.

[0027] 7. The mixing impeller provided by the present invention has at least one flow hole in the area between two blades. The flow hole is inclined from the inside to the outside and towards the same side in the opposite direction to the rotation direction of the impeller body. When the impeller body rotates with its own axis, the liquid material in the cavity is driven to be thrown out of the flow hole by the centrifugal force generated by the rotation. After colliding with the blade, it is further dispersed, thereby making the mixing of solid material and liquid material more uniform, reducing the generation of agglomerates, and improving the mixing efficiency.

[0028] 8. The pulping equipment provided by the present invention installs the above-mentioned mixing impeller inside the housing, thereby increasing the mixing interface height of the solid and liquid materials in the pulping equipment, thereby accelerating the feeding speed and improving the pulping efficiency. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a structural view of a hybrid impeller provided in some embodiments of the present invention;

[0031] Figure 2 for Figure 1 A half-section view of the mixing impeller is shown;

[0032] Figure 3 This is a structural view of a hybrid impeller with a flat orifice for flow passage provided in some embodiments of the present invention;

[0033] Figure 4 This is a structural view of a baffled mixing impeller provided in some embodiments of the present invention;

[0034] Figure 5 for Figure 4 A half-section view of the mixing impeller is shown;

[0035] Figure 6 This is a cross-sectional view of a pulping apparatus equipped with a mixing impeller, provided in some embodiments of the present invention.

[0036] Explanation of reference numerals in the attached drawings: 1. Shell; 2. Mixing impeller; 3. Liquid dispersion device; 4. Solid dispersion device; 11. Liquid inlet; 12. Solid inlet; 13. Mixture outlet; 21. Impeller body; 22. Blade; 211. Frustum section; 212. Cylindrical section; 213. Flow hole; 214. Cavity; 215. Baffle. Detailed Implementation

[0037] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] Reference Figures 1 to 5 As shown, the present invention discloses a hybrid impeller, comprising: an impeller body 21, wherein a cavity 214 extending toward the top is provided at the bottom end of the impeller body 21, and a flow passage 213 communicating with the cavity 214 is provided on the side wall of the impeller body 21.

[0042] Specifically, the impeller body 21 can rotate around its own axis. During rotation, solid material is conveyed from top to bottom along the external flow channel of the impeller body 21; liquid material is conveyed from bottom to top through the cavity 214 of the impeller body 21. The liquid material flows through the cavity 214 and flows out through the flow holes 213 on the side wall of the impeller body 21, mixing with the solid material. The cavity 214 and the flow holes 213 on the impeller body 21 raise the liquid level of the liquid material, thereby increasing the mixing interface height between the solid and liquid materials and further improving the mixing efficiency.

[0043] Reference Figures 1 to 5 As shown, in some embodiments of the present invention, there are multiple flow holes 213, and the multiple flow holes 213 are spaced apart around the side wall of the impeller body 21, and the flow holes 213 are located on the side wall near the top of the impeller body 21.

[0044] Specifically, the flow passage 213 is located on the side wall at the top of the impeller body 21. The liquid material is conveyed from bottom to top, flows through the cavity 214, and is thrown out through the flow passage 213, that is, it flows out from the top side wall of the impeller, thereby improving the mixing interface between the solid and liquid materials. Multiple flow passages 213 are arranged at intervals. When the impeller body 21 rotates around its own axis, the liquid material in the cavity 214 is thrown out through the multiple flow passages 213 under the action of centrifugal force, which plays a dispersing role on the liquid material, making the mixing of solid and liquid materials more uniform and further improving the mixing efficiency of solid and liquid materials.

[0045] Reference Figure 2 As shown, in some embodiments of the present invention, the flow passage 213 is inclined from the top end of the impeller body 21 toward the bottom end of the impeller body 21 along the direction from the inner wall of the impeller body 21 toward the outer wall.

[0046] Specifically, when the flow passage 213 is inclined from the top to the bottom of the impeller body 21, the liquid material is thrown out of the flow passage and flows downwards, and the solid material also flows downwards. This causes the mixing interface between the solid and liquid materials to form an inclined surface, thereby increasing the mixing contact area between the solid and liquid materials, improving the mixing efficiency, accelerating the downward conveying speed of the solid material, reducing the probability of backflow, and improving the mixing quality of the solid and liquid materials. In addition, it can also prevent the agglomerates generated by the mixing of solid and liquid materials from clogging the flow passage 213 and affecting the mixing efficiency.

[0047] Reference Figure 4 and Figure 5 As shown, in some embodiments of the present invention, the impeller body 21 is provided with a baffle 215 above the flow hole 213, and the baffle 215 is inclined from the top end of the impeller body 21 toward the bottom end.

[0048] Specifically, during the mixing process of solid and liquid materials, agglomeration is likely to occur. When the flow hole 213 is inclined from the bottom end of the impeller body 21 to the top end of the impeller body 21, or is arranged radially along the impeller body 21, the solid and liquid materials come into contact and mix at the flow hole 213. If agglomeration occurs, the agglomerate is too large and is likely to fall into the flow hole 213, causing blockage and affecting the feeding of liquid materials.

[0049] A baffle 215 is provided above the flow hole 213, and the baffle 215 is inclined from the top end of the impeller body 21 towards the bottom end. When the solid material flows from top to bottom, it flows away from the outer wall of the impeller body 21 under the obstruction of the baffle 215, so as to avoid the mixing of solid material and liquid material at the flow hole 213, that is, to avoid the generated agglomerates from clogging the flow hole 213 and affecting the mixing efficiency.

[0050] In some embodiments of the present invention, the flow passage 213 is inclined from the bottom end of the impeller body 21 toward the top end of the impeller body 21 along the direction from the inner wall of the impeller body 21 toward the outer wall.

[0051] Specifically, the flow passage 213 is inclined from the bottom end of the impeller body 21 to the top end of the impeller body 21, which further increases the mixing interface height of the liquid material and the solid material, thereby improving the mixing quality and accelerating the mixing speed.

[0052] In some embodiments of the present invention, the flow passage 213 is inclined from the inside out and toward the same side in the direction opposite to the rotation direction of the impeller body 21.

[0053] Specifically, in order to improve the dispersion of liquid materials and enable better mixing of liquid materials with solid materials, the flow holes 213 are inclined to the same side from the inside out along the opposite direction of the rotation direction of the impeller body 21. When the impeller body 21 rotates around its own axis, under the action of centrifugal force, the flow direction of the liquid material is in the same direction as the centrifugal force, and the liquid material is more easily thrown out from the flow holes 213, so that the liquid material is dispersed. The higher the dispersion of the liquid, the better the mixing quality with the solid material.

[0054] In some embodiments of the present invention, the flow passage 213 is arranged radially along the impeller body 21.

[0055] In some embodiments of the present invention, the flow passage 213 is a round hole, an elliptical hole, a polygonal hole, or a flat hole.

[0056] Reference Figure 3 As shown in the figure, the flat hole design is beneficial for dispersing liquid materials, increasing the dispersion of liquid materials, and improving the mixing quality of solid and liquid materials.

[0057] Reference Figures 1 to 5 As shown, in some embodiments of the present invention, the impeller body 21 includes a cylindrical section 212 and a frustum section 211 smoothly connected to the cylindrical section 212. The large end of the frustum section 211 is connected to the cylindrical section 212, and the cavity 214 penetrates the cylindrical section 212 and extends into the frustum section 211.

[0058] In some embodiments of the present invention, the flow hole 213 is provided on the side wall of the frustum section 211.

[0059] Specifically, the truncated cone section 211 facilitates the downward conveying of solid materials. Since the sidewall of the truncated cone section 211 is inclined, the solid material feeding speed is increased. A cylindrical section 212 is located below the truncated cone section 211, increasing the height of the impeller body 21. A cavity 214 penetrates both the cylindrical section 212 and the truncated cone section 211. A flow-through hole 213 is located on the sidewall of the truncated cone section 211 and communicates with the cavity 214. When liquid materials are conveyed from bottom to top, they flow through the cavity 214 and are ejected from the flow-through hole 213 on the sidewall of the truncated cone section 211, mixing with the solid materials on the sidewall of the truncated cone section 211. Because the sidewall of the truncated cone section 211 is inclined, the mixing interface area between the solid and liquid materials is increased, improving the feeding rate and mixing efficiency.

[0060] In some embodiments of the present invention, the cavity 214 is an annular cavity, which is coaxially arranged with the impeller body 21, or the cavity 214 includes a plurality of spaced sub-cavities, which together constitute the cavity 214.

[0061] Specifically, the cavity 214 provides a temporary storage space for liquid materials. When the impeller body 21 rotates, the liquid materials temporarily stored in the cavity 214 can be thrown out from the flow hole 213 under the action of centrifugal force, improving the dispersion of the liquid materials. When the cavity 214 is an annular cavity, the volume of the cavity 214 is increased, which allows the liquid materials to be fully dispersed when flowing out, improving the mixing quality of the liquid and solid materials.

[0062] Understandably, when cavity 214 is composed of multiple sub-cavities, the liquid material flows from bottom to top into these sub-cavities. During the rotation of the impeller body 21, the liquid material undergoes initial dispersion within the sub-cavities and is further dispersed upon exiting through the flow holes 213 due to centrifugal force. The arrangement of sub-cavities collectively forming cavity 214 improves the dispersion of the liquid material, thereby enhancing the mixing quality of the solid and liquid materials and increasing mixing efficiency.

[0063] In some embodiments of the present invention, the outer wall of the impeller body 21 is provided with a plurality of blades 22 spaced apart, and at least one flow passage 213 is provided in the area between two adjacent blades 22.

[0064] Specifically, the blades 22 provide guidance for the downward conveying of solid materials. A flow channel is formed between two adjacent blades 22, and the solid materials are conveyed from top to bottom through the flow channel. The flow holes 213 are set between two adjacent blades 22, that is, on the flow channel. During the rotation of the impeller body 21, the flow holes 213 are inclined from the inside out and towards the same side in the opposite direction to the rotation direction of the impeller body 21. At this time, as the impeller body 21 rotates with its own axis, the liquid materials in the cavity 214 are thrown out from the flow holes 213 under the action of centrifugal force, and are further dispersed after colliding with the blades 22. This makes the mixing of solid and liquid materials more uniform, reduces the formation of agglomerates, and improves the mixing efficiency.

[0065] It is understood that the number and diameter of the flow passages 213 are not limitations of this invention. The number and diameter of the flow passages 213 are positively correlated with the flow velocity of the liquid material, while the diameter of the flow passages 213 is inversely correlated with the dispersion of the liquid material. When the number of flow passages 213 is greater and the diameter is larger, the flow velocity of the liquid material is faster under a certain pressure of the driving pump. When the number of flow passages 213 is less and the diameter is smaller, the flow velocity of the liquid material is slower. Furthermore, when the diameter of the flow passages 213 is smaller, the dispersion of the liquid material is higher. Therefore, the specific parameters of the number and diameter of the flow passages 213 are selected and determined according to the properties of the liquid material and the pressure of the driving pump.

[0066] In some embodiments of the present invention, the outer wall of the impeller body 21 is provided with a plurality of blades 22 spaced apart, and the two ends of the baffle 215 abut against the blades 22 on the adjacent sides.

[0067] Specifically, the two ends of the baffle 215 can be set to abut against the two adjacent blades 22, or they can only cover the diameter of the flow hole 213. Therefore, the width of the baffle 215 is not a limitation of the present invention. However, the distance between the far end of the baffle 215 and the outer wall surface of the impeller body 21 must be less than the chord length of the blade 22 to avoid excessive accumulation of solids at the baffle 215, which would affect the solid feeding efficiency.

[0068] Reference Figure 6 As shown, the present invention also proposes a pulping device, comprising: a housing 1, wherein the mixing impeller 2 is disposed in the housing 1.

[0069] Specifically, a liquid inlet 11 is provided on the peripheral wall at the bottom of the shell 1, through which liquid material enters. A liquid dispersion device 3 is provided at the bottom of the shell 1, through which the liquid material flows to the mixing impeller 2 after being dispersed by the liquid dispersion device 3. A solid inlet 12 is provided at the top of the shell 1, and a solid dispersion device 4 is provided at the top of the shell 1, through which the solid material flows to the mixing impeller 2 after being dispersed by the solid dispersion device 4. The dispersed liquid material passes through the cavity 214 at the bottom of the impeller body 21 and is thrown out through the flow hole 213 under the action of centrifugal force. The solid material is conveyed downward from the external flow channel of the impeller body 21. After the solid material and liquid material are fully mixed on the top side wall of the impeller body 21, they flow out from the mixture outlet 13 on the side wall of the shell 1.

[0070] Liquid material enters through inlet 11, is dispersed by the dispersion device, and then flows upward under the action of the drive pump. A guide plate is provided between the liquid dispersion device 3 and the mixing impeller 2 to guide the liquid into the cavity 214 of the impeller. Solid material, after being dispersed by the solid dispersion device 4, flows towards the mixing impeller 2. When the mixing impeller 2 rotates, under the guiding pressure of the blades 22, the solid material is conveyed downward along the flow channel between two adjacent blades 22 and mixed near the flow hole 213. This mixing impeller 2 increases the height of the solid-liquid mixing interface, thereby accelerating the feeding speed and improving the pulping efficiency.

[0071] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A mixing impeller characterized by, include: Impeller body (21), the bottom end of the impeller body (21) is provided with a cavity (214) extending towards the top, and the side wall of the impeller body (21) is provided with a flow hole (213) communicating with the cavity (214). The impeller body (21) is provided with a baffle (215) above the flow hole (213), and the baffle (215) is inclined from the top end of the impeller body (21) toward the bottom end.

2. The hybrid impeller according to claim 1, characterized in that, The number of flow passages (213) is multiple, and the multiple flow passages (213) are arranged at intervals around the side wall of the impeller body (21), and the flow passages (213) are located on the side wall near the top of the impeller body (21).

3. The hybrid impeller according to claim 1, characterized in that, Along the direction from the inner wall of the impeller body (21) toward the outer wall, the flow passage (213) is inclined from the top end of the impeller body (21) toward the bottom end of the impeller body (21).

4. The mixing impeller according to claim 1, characterized in that, Along the direction from the inner wall of the impeller body (21) toward the outer wall, the flow passage (213) is inclined from the bottom end of the impeller body (21) toward the top end of the impeller body (21).

5. The hybrid impeller according to claim 1, characterized in that, The flow passage (213) is arranged radially along the impeller body (21).

6. The hybrid impeller according to claim 3 or 4, characterized in that, Along the opposite direction of the rotation of the impeller body (21), the flow passage (213) is inclined from the inside out and toward the same side.

7. The hybrid impeller according to claim 1, characterized in that, The flow passage (213) can be a round hole, an elliptical hole, a polygonal hole, or a flat hole.

8. The hybrid impeller according to claim 1, characterized in that, The impeller body (21) includes a cylindrical section (212) and a frustum section (211) smoothly connected to the cylindrical section (212). The large end of the frustum section (211) is connected to the cylindrical section (212). The cavity (214) passes through the cylindrical section (212) and extends into the frustum section (211).

9. The hybrid impeller according to claim 8, characterized in that, The flow passage (213) is located on the side wall of the frustum section (211).

10. The hybrid impeller according to claim 1, characterized in that, The cavity (214) is an annular cavity, which is coaxially arranged with the impeller body (21), or the cavity (214) includes multiple spaced sub-cavities, which together constitute the cavity (214).

11. The hybrid impeller according to claim 1, characterized in that, The outer wall of the impeller body (21) is provided with a plurality of blades (22) spaced apart, and at least one flow hole (213) is provided in the area between two adjacent blades (22).

12. The mixing impeller according to claim 1, characterized in that, The outer wall of the impeller body (21) is provided with a plurality of blades (22) spaced apart, and the two ends of the baffle (215) abut against the blades (22) on the adjacent sides.

13. A pulping device, characterized in that, include: Shell (1); The mixing impeller (2) according to any one of claims 1-12, wherein the mixing impeller (2) is disposed in the housing (1).

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