CN116422176A - Mixing impeller and pulping equipment - Google Patents

Abstract

The invention relates to the technical field of pulping, and discloses a mixing impeller and pulping equipment, wherein the mixing impeller comprises a main shaft and an impeller main body; the liquid enters the conveying cavity of the main shaft and flows from bottom to top, the liquid flows into the cavity of the impeller main body from the conveying cavity, during the rotation process of the impeller, the liquid is dispersed again under the action of centrifugal force in the cavity, the side wall of the impeller main body is provided with a flow passage communicated with the cavity, and the liquid after the redispersion is thrown out from the flow passage under the action of the centrifugal force and is mixed with the solid of the flow passage outside the impeller. The setting of carrying the chamber in the main shaft makes the flow path extension of liquid and rise, and after the liquid flowed through carrying chamber, cavity, the overflow channel from impeller main part lateral wall surface throws away, and the mixed interface height of liquid and solid can be improved, in addition, the cavity can improve the dispersity of liquid to make the mixing of solid and liquid more abundant, improve mixing quality, further improve mixing efficiency.

Description

Mixing impeller and pulping equipment

Technical Field

The invention relates to the technical field of pulping, in particular to a mixing impeller and pulping equipment.

Background

Pulping equipment is widely used in the industries of pharmacy, food, chemical industry and the like, and in the preparation process stage, liquid and solid are fully mixed to obtain a prefabricated mixture, so that the subsequent processing efficiency is improved.

In the existing equipment, the dispersion and mixing of solid and liquid are integrated on the same equipment, and as the interface between the solid and the liquid in the existing structure is lower, the contact area between the solid and the liquid is small and the contact time is short, the problems of low mixing degree of the solid and the liquid and low mixing efficiency are caused, and the pulping efficiency is influenced.

Disclosure of Invention

Therefore, the invention aims to overcome the defects of low solid-liquid mixing degree and low mixing efficiency caused by low solid-liquid interface in the prior art, thereby providing a mixing impeller and pulping equipment.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a mixing impeller, comprising: a main shaft and an impeller main body; the main shaft is provided with a conveying cavity along the axial direction; the impeller main body is fixedly sleeved on the main shaft, a cavity is formed in the inner wall of the impeller main body, the cavity is communicated with the conveying cavity, and a flow passage communicated with the cavity is formed in the side wall of the impeller main body.

According to some embodiments of the invention, the spindle is provided with a plurality of first through holes and a plurality of second through holes, the first through holes are arranged around the peripheral wall of the spindle, which is positioned in the cavity, at intervals, and the second through holes are arranged around the peripheral wall of the spindle, which is positioned outside the cavity, at intervals.

According to some embodiments of the invention, the impeller main body is provided with a central through hole along the axial direction thereof, the main shaft is arranged on the central through hole in a penetrating way, the cavity comprises a plurality of sub-cavities which are arranged around the periphery of the central through hole at intervals, and the plurality of sub-cavities are respectively communicated with the conveying cavity through a plurality of first through holes.

According to some embodiments of the invention, the impeller main body is provided with a central through hole along the axial direction thereof, the main shaft is arranged on the central through hole in a penetrating way, the cavity is an annular cavity, and the annular cavity and the impeller main body are coaxially arranged.

According to some embodiments of the invention, the impeller body is provided with a baffle plate above the flow passage, the baffle plate being inclined from the top end of the impeller body towards the bottom end.

According to some embodiments of the invention, the flow passage is a plurality of flow holes, a plurality of blades are arranged on the peripheral side of the outer wall of the impeller main body at intervals, and at least one flow hole is arranged in the area between two adjacent blades.

According to some embodiments of the invention, the flow passage is a plurality of flow-through holes, and the flow-through holes are inclined from the top end of the impeller body to the bottom end of the impeller body along the direction of the inner wall of the impeller body towards the outer wall.

According to some embodiments of the invention, the flow passage is a plurality of flow-through holes, and the flow-through holes incline from the bottom end of the impeller body to the top end of the impeller body along the direction of the inner wall of the impeller body towards the outer wall; or (b)

The flow-through hole is arranged along the radial direction of the impeller main body.

According to some embodiments of the invention, the flow passage is a plurality of slits, the extending direction of the slits is along the rotation direction of the impeller main body, a plurality of blades are arranged on the peripheral side of the outer wall of the impeller main body at intervals, and the slits are arranged around the side wall of the impeller main body at intervals and are positioned in the area between every two adjacent blades.

According to some embodiments of the invention, the slit is inclined from the top end of the impeller body towards the bottom end of the impeller body in the direction of the inner wall of the impeller body towards the outer wall.

According to some embodiments of the invention, the slit is inclined from the bottom end of the impeller body to the top end of the impeller body in the direction of the inner wall of the impeller body towards the outer wall; or (b)

The slit is disposed along a radial direction of the impeller main body.

The invention also proposes a pulping apparatus comprising: and the mixing impeller is arranged in the shell.

The technical scheme of the invention has the following advantages:

1. according to the mixing impeller provided by the invention, the impeller main body is sleeved on the main shaft and rotates along with the main shaft, in the rotation process, solids are conveyed from top to bottom along the external flow channel of the impeller main body, liquid enters the conveying cavity of the main shaft and flows from bottom to top, the liquid flows into the cavity of the impeller main body from the conveying cavity, in the rotation process of the impeller, the liquid is dispersed again under the centrifugal force effect in the cavity, the side wall of the impeller main body is provided with the through-flow channel communicated with the cavity, and the dispersed liquid is thrown out from the through-flow channel under the centrifugal force effect and is mixed with the solids of the external flow channel of the impeller. The arrangement of the conveying cavity in the main shaft enables the flow path of liquid to be prolonged and lifted, after the liquid flows through the conveying cavity and the cavity, the liquid is thrown out from the flow passage on the surface of the side wall of the impeller main body, the height of the mixing interface of the liquid and the solid is improved, so that the mixing of the solid and the liquid is more sufficient, and the mixing efficiency is further improved.

2. According to the mixing impeller provided by the invention, liquid is conveyed from bottom to top in the conveying cavity and enters the cavity of the impeller main body communicated with the conveying cavity, and the impeller main body is impacted with the inner side wall of the cavity under the action of centrifugal force in the cavity in the rotation process of the impeller main body along with the main shaft, so that the dispersion degree of the liquid is improved; because the flow passage is arranged on the side wall of the impeller main body and is communicated with the cavity, the liquid after redispersion is thrown out of the flow passage to be mixed with the solid of the external flow passage of the impeller main body under the action of centrifugal force in the rotation process of the impeller main body. The setting of cavity both can improve temporary storage space for liquid, can improve the dispersity of liquid simultaneously, and then make the mixing of solid and liquid more abundant, further improve mixing efficiency.

3. According to the mixing impeller provided by the invention, liquid enters the lower end of the conveying cavity from the second through hole, flows from bottom to top, and flows into the cavity from the first through hole; the first through holes are arranged at intervals around the upper peripheral wall of the main shaft, the second through holes are arranged at intervals around the lower peripheral wall of the main shaft, and liquid is thrown out from the first through holes into the cavity for redispersion in the main shaft rotation process. The first through holes and the second through holes are all provided with a plurality of holes, so that the flow rate of liquid is improved, the blanking speed of the liquid is improved, and the mixing rate of solid and liquid is accelerated.

4. The mixing impeller provided by the invention has the advantages that the cavity comprises the plurality of sub-cavities which are arranged around the periphery of the central through hole at intervals, the plurality of sub-cavities are respectively communicated with the conveying cavity through the plurality of first through holes, when liquid is conveyed from bottom to top, the liquid enters the sub-cavities from the first through holes, and the positions of the first through holes are always corresponding to the sub-cavities due to relative static state of the impeller main body and the main shaft, so that the liquid can smoothly flow into the sub-cavities from the first through holes, and when the impeller main body rotates along with the main shaft, the liquid collides with the inner side walls of the sub-cavities under the action of centrifugal force, so that the dispersion degree of the liquid is further improved.

5. According to the mixing impeller provided by the invention, the cavity is arranged as the annular cavity, so that the volume of the cavity is increased, and after liquid flows into the cavity from the conveying cavity, the longer the liquid stays in the cavity along with rotation of the impeller, the more fully the liquid is dispersed.

6. According to the pulping equipment provided by the invention, the mixing impeller is arranged in the shell, so that the height of the mixing interface between the solid and the liquid of the pulping equipment is improved, the blanking speed is increased, and the pulping efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a structural view of a mixing impeller provided in some embodiments of the invention;

FIG. 2 is a view of the impeller body structure providing an flow passage that is an flow-through aperture in some embodiments of the invention;

FIG. 3 is a half cross-sectional view of the mixing impeller shown in FIG. 2;

FIG. 4 is a view of the body of an impeller with a through-flow channel being a slit provided in some embodiments of the invention;

FIG. 5 is a view of the body of an impeller provided with baffles in some embodiments of the invention;

fig. 6 is a cross-sectional view of a pulping apparatus equipped with a mixing impeller provided in some embodiments of the invention.

Reference numerals illustrate: 1. a housing; 2. a mixing impeller; 3. a liquid dispersing device; 4. a solid dispersing device; 11. a liquid inlet; 12. a solids inlet; 13. a mixture outlet; 21. a main shaft; 22. an impeller main body; 23. a blade; 24. a baffle; 211. a delivery chamber; 212. a first through hole; 213. a second through hole; 221. a cavity; 222. a flow-through channel; 223. a central through hole.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Referring to fig. 1, the present invention proposes a mixing impeller 2 comprising: a main shaft 21 and an impeller main body 22; the main shaft 21 is provided with a conveying cavity 211 along the axial direction; the impeller main body 22 is fixedly sleeved on the main shaft 21, a cavity 221 is formed in the inner wall of the impeller main body 22, the cavity 221 is communicated with the conveying cavity 211, and a flow passage 222 communicated with the cavity 221 is formed in the side wall of the impeller main body 22.

Specifically, the impeller main body 22 is fixedly sleeved on the main shaft 21 and rotates along with the main shaft 21, in the rotation process, solids are conveyed from top to bottom along an external flow channel of the impeller main body 22, liquid enters a conveying cavity 211 of the main shaft 21 and flows from bottom to top, the liquid flows from the conveying cavity 211 into a cavity 221 of the impeller main body 22, in the rotation process of the impeller, the liquid is dispersed again under the centrifugal force effect in the cavity 221, a through-flow channel 222 communicated with the cavity 221 is formed on the side wall of the impeller main body 22, and the dispersed liquid is thrown out from the through-flow channel 222 under the centrifugal force effect and is mixed with the solids of the external flow channel of the impeller. The arrangement of the conveying cavity 211 in the main shaft 21 prolongs and raises the flow path of the liquid, the liquid is thrown out from the through-flow channel 222 on the side wall surface of the impeller main body 22 after flowing through the conveying cavity 211 and the cavity 221, and the height of the mixing interface between the liquid and the solid is improved, so that the mixing of the solid and the liquid is more sufficient, and the mixing efficiency is further improved.

It can be understood that the liquid is conveyed from bottom to top in the conveying cavity 211 and enters the cavity 221 of the impeller main body 22 communicated with the conveying cavity 211, and the liquid is impacted with the inner side wall of the cavity 221 under the action of centrifugal force in the cavity 221 when the impeller main body 22 rotates along with the main shaft 21, and the liquid is dispersed again, so that the dispersion degree of the liquid is improved; since the through-flow channel 222 is disposed on the sidewall of the impeller body 22, and the through-flow channel 222 is in communication with the cavity 221, the redispersed liquid is thrown out of the through-flow channel 222 to be mixed with the solid of the external flow channel of the impeller body 22 under the centrifugal force during the rotation of the impeller body 22. The setting of cavity 221 both can improve the space of keeping in for liquid, can improve the dispersity of liquid simultaneously, and then makes the mixing of solid and liquid more abundant, further improves mixing efficiency.

Referring to fig. 1, in some embodiments of the present invention, a plurality of first through holes 212 and a plurality of second through holes 213 are provided on the main shaft 21, the first through holes 212 are spaced around the peripheral wall of the main shaft 21 located in the cavity 221, and the second through holes 213 are spaced around the peripheral wall of the main shaft 21 located outside the cavity 221.

Specifically, the liquid enters the lower end of the conveying chamber 211 from the second through hole 213, flows from bottom to top under the driving of the driving pump, and flows into the cavity 221 from the first through hole 212; the first through holes 212 are arranged at intervals around the upper peripheral wall of the main shaft 21, the second through holes 213 are arranged at intervals around the lower peripheral wall of the main shaft 21, and liquid is thrown out from the first through holes 212 into the cavity 221 for redispersion in the rotation process of the main shaft 21. The first through holes 212 and the second through holes 213 are all provided with a plurality of holes, so that the flow rate of liquid is improved, the blanking speed of the liquid is improved, and the mixing rate of solid and liquid is accelerated. It is understood that the number and shape of the first through holes 212 and the second through holes 213 are not limiting of the present invention.

In some embodiments of the present invention, the impeller main body 22 is provided with a central through hole 223 along an axial direction thereof, the main shaft 21 is penetrated through the central through hole 223, the cavity 221 includes a plurality of sub-cavities surrounding an outer circumference of the central through hole 223 and spaced apart, and the plurality of sub-cavities are respectively communicated with the delivery cavity 211 through a plurality of first through holes 212.

The cavity 221 is in communication with the central through hole 233, and the diameter of the central through hole 233 is smaller than that of the cavity 221, and the spindle 21 is inserted through the central through hole 233 to seal the cavity 221 outside the spindle 21.

Specifically, the cavity 221 includes a plurality of sub-cavities surrounding the periphery of the central through hole 223 and disposed at intervals, and the plurality of sub-cavities are respectively communicated with the conveying cavity 211 through a plurality of first through holes 212, when the liquid is conveyed from bottom to top, the liquid enters the sub-cavities from the first through holes 212, and because the impeller main body 22 and the spindle 21 are relatively static, the position of the first through holes 212 is always corresponding to the sub-cavities, so that the liquid can smoothly flow into the sub-cavities from the first through holes 212, and when the impeller main body 22 rotates along with the spindle 21, the liquid collides with the inner side walls of the sub-cavities under the action of centrifugal force, thereby further improving the dispersion degree of the liquid.

It will be appreciated that the greater the number of subchambers, the greater the effectiveness of the dispersion of the liquid, but that as the number of subchambers increases, the volume of the individual subchambers will be correspondingly reduced, resulting in a reduced residence time of the liquid within the subchambers, i.e. a reduced time for the liquid to disperse.

In some embodiments of the present invention, the impeller main body 22 is provided with a central through hole 223 along an axial direction thereof, the main shaft 21 is penetrated through the central through hole 223, and the cavity 221 is an annular cavity coaxially disposed with the impeller main body 22.

Specifically, when the cavity 221 is a plurality of sub-cavities, the overall volume of the cavity 221 is reduced, and when the flow speed of the liquid is high, insufficient dispersion occurs, and the cavity 221 is configured as an annular cavity, so that the volume of the cavity 221 is increased, and after the liquid flows into the cavity 221 from the conveying cavity 211, the longer the liquid remains in the cavity 221 along with the rotation of the impeller, the more sufficient dispersion occurs.

Referring to fig. 5, in some embodiments of the present invention, a baffle 24 is provided above the impeller body 22 in the flow passage 222, the baffle 24 being inclined from the top end toward the bottom end of the impeller body 22.

Specifically, the baffle 24 is disposed above the flow-through channel 222, and the baffle 24 is inclined from the top end of the impeller main body 22 toward the bottom end, so that when solids flow from top to bottom, under the blocking effect of the baffle 24, the solids flow toward the direction away from the outer wall of the impeller main body 22, so as to avoid mixing the solids and the liquid at the flow-through channel 222, i.e. avoid blocking the flow-through channel 222 due to the generated caking, and affect the mixing efficiency.

It will be appreciated that the outer wall of the impeller body 22 is provided with a plurality of blades 23 at intervals, and that the two ends of the baffle 24 abut against the blades 23 on the adjacent two sides.

Specifically, two ends of the baffle 24 may be abutted against two adjacent blades 23, or may cover only the flow-through channel 222, so the arrangement of the width of the baffle 24 is not a limitation of the present invention, but the distance between the distal end of the baffle 24 and the outer wall surface of the impeller main body 22 needs to be smaller than the chord length of the blades 23, so as to avoid excessive accumulation of solids at the baffle 24 and influence on the discharging efficiency of the solids.

Referring to fig. 2 and 3, in some embodiments of the present invention, the flow passage 222 is a plurality of flow holes, the outer wall of the impeller body 22 is provided with a plurality of blades 23 at intervals, and a region between two adjacent blades 23 is provided with at least one flow hole.

Specifically, the shape of the overflow hole may be a circular hole, an elliptical hole, a polygonal hole, or a flat hole. It can be appreciated that the arrangement of the flat holes is beneficial to scattering the liquid, increases the dispersion degree of the liquid and improves the mixing quality of the solid and the liquid.

It should be noted that the number of overflow holes and the aperture are not limiting of the present invention, the number of overflow holes and the aperture are in positive correlation with the flow speed of the liquid, the aperture of the overflow hole is in inverse correlation with the dispersion degree of the liquid, when the number of overflow holes is larger, the flow speed of the liquid is faster under a certain pressure of driving the pump, and when the number of overflow holes is smaller, the aperture is smaller, the flow speed of the liquid is slower; further, the smaller the aperture of the overflow hole, the higher the dispersion degree of the liquid. The number of flow-through holes and the specific parameters of the aperture are thus chosen and determined according to the nature of the liquid and the pressure driving the pump.

Referring to fig. 4, in some embodiments of the present invention, the through-flow channel 222 is a plurality of slits, the extending direction of the slits is along the rotation direction of the impeller main body 22, the peripheral side of the outer wall of the impeller main body 22 is provided with a plurality of blades 23 at intervals, and the plurality of slits are disposed around the side wall of the impeller main body 22 at intervals and are located in the region between every two adjacent blades 23.

Specifically, the extending direction of the slit is along the rotation direction of the impeller main body 22, that is, the slit extends along the annular surface of the impeller main body 22, and of course, the specific length of the extension is not specifically limited herein, and the slit may be a continuous annular shape or an intermittent annular shape.

It will be appreciated that when the cavity 221 is formed by a plurality of sub-cavities, the slit may be a continuous ring, and the wall thickness of the sub-cavities forms a structure similar to the supporting ribs, so that the slit in the ring is connected by the plurality of supporting ribs at intervals, and the integrity of the impeller main body 22 is not affected. When the cavity 221 is an annular cavity, the slit is intermittent and annular, and because the slit needs to communicate with the cavity 221, when the cavity 221 is an annular cavity, the slit is continuous and annular, which affects the integrity of the impeller body 22.

In some embodiments of the present invention, the number of slits is a plurality, and the slits are spaced around the sidewall of the impeller body 22 and are located in the area between every two adjacent blades 23, that is, the slits are broken by the blades 23, so that the integrity of the impeller body 22 is not affected, and the performance of the impeller body 22 is not affected under the scouring action of the material. The arrangement of the slit is not particularly limited to the hollow space, and the hollow space may be an annular space formed around the outer periphery of the central through hole 223 or a hollow space formed by a plurality of sub-hollow spaces.

The slit is preferably provided on a side wall of the impeller main body 22 near the tip. The slit may be formed by grooving the impeller body 22 to a width of 2-5mm.

The liquid is conveyed from bottom to top, flows into the cavity 221 from the conveying cavity 211, the impeller main body 22 rotates, and flows out of the slit after being dispersed again in the cavity 221, namely flows out of the top side wall of the impeller, so that the mixing interface of the solid and the liquid is improved; the slit is annular slit or slit interval multistage surrounding impeller main part 22 circumference side setting, when impeller main part 22 rotates around its self axis, the liquid in cavity 221 is thrown away from annular slit or a plurality of slits that are annular arrangement by centrifugal force, plays the dispersion effect to the liquid, and slit itself is long and narrow moreover, and the liquid can disperse when throwing away from the slit and be the annular liquid level around impeller main part 22, and area of contact is big, and the solid falls from whichever direction of mixing impeller 2, homoenergetic and liquid contact mix, further improves solid and liquid's mixing efficiency.

In some embodiments of the present invention, the flow passage 222 is a plurality of flow-through holes that slope from the top end of the impeller body 22 toward the bottom end of the impeller body 22 in the direction of the inner wall toward the outer wall of the impeller body 22.

In some embodiments of the present invention, the flow passage 222 is a plurality of flow-through holes, which are inclined from the bottom end of the impeller body 22 to the top end of the impeller body 22 in the direction from the inner wall toward the outer wall of the impeller body 22; or (b)

The flow-through holes are provided in the radial direction of the impeller main body 22.

In some embodiments of the present invention, the slit is inclined from the top end of the impeller body 22 toward the bottom end of the impeller body 22 in the direction of the inner wall toward the outer wall of the impeller body 22.

In some embodiments of the present invention, the slit is inclined from the bottom end of the impeller body 22 toward the top end of the impeller body 22 in the direction of the inner wall toward the outer wall of the impeller body 22; or (b)

The slits are arranged in the radial direction of the impeller main body 22.

Specifically, when the baffle 24 is not disposed above the overflow channel 222, the overflow channel 222 is opened from the top end of the impeller main body 22 to the bottom end of the impeller main body 22 along the direction of the inner wall of the impeller main body 22 toward the outer wall, so as to avoid blocking the overflow channel 222 by the caking generated when mixing the solids and the liquids, and ensure the smoothness of liquid discharging;

when the baffle 24 is disposed above the overflow channel 222, the solids are conveyed along the baffle 24 in a direction away from the impeller main body 22 under the centrifugal force, and are mixed with the liquid in a direction away from the impeller main body 22, so as to avoid blocking the overflow channel 222 due to caking generated by the solids and the liquid. Therefore, when the baffle 24 is provided above the flow passage 222, the direction in which the flow passage 222 is provided is not a limitation of the present invention, that is, in the direction in which the inner wall of the impeller main body 22 faces the outer wall, the flow passage 222 is inclined from the bottom end of the impeller main body 22 toward the top end of the impeller main body 22; or radially of the impeller body 22.

Referring to fig. 6, the present invention also proposes a pulping apparatus comprising: a casing 1, and a mixing impeller 2 provided in the casing 1.

Specifically, the liquid inlet 11 is formed in the peripheral wall of the bottom of the casing 1, liquid enters from the liquid inlet 11, the liquid dispersing device 3 is arranged at the bottom of the casing 1, the liquid flows to the mixing impeller 2 after being dispersed by the liquid dispersing device 3, the solid inlet 12 is formed in the top of the casing 1, the solid dispersing device 4 is arranged at the top of the casing 1, and the solid flows to the mixing impeller 2 after being dispersed by the solid dispersing device 4.

The dispersed liquid enters the conveying cavity 211 from the first through hole 212 of the main shaft 21, flows from bottom to top under the action of the driving pump, and flows out from the second through hole 213 into the cavity 221 when the liquid spreads to the top of the conveying cavity 211. The impeller main body 22 rotates along with the main shaft 21, liquid is dispersed again in the cavity 221, the liquid is thrown out from the flow passage 222 on the side wall of the impeller main body 22 under the action of centrifugal force, the solid is conveyed downwards from the outer flow passage of the impeller main body 21, and after the solid and the liquid are fully mixed on the side wall of the top of the impeller main body 21, the solid and the liquid flow out from the mixture outlet 13 on the side wall of the shell 1.

After being dispersed by the solid dispersing device 4, the solid flows to the mixing impeller 2, and when the mixing impeller 2 rotates, the solid is conveyed downwards along the flow channel between two adjacent blades 22 under the guiding and pressing action of the blades 22, and is mixed at a position close to the flow channel 222.

The mixing impeller 2 improves the height of a mixing interface between the solid and the liquid, so that the blanking speed is increased, the mixing efficiency and the mixing quality of the solid and the liquid are improved through redispersing the liquid, and the pulping efficiency is improved.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims (12)

1. A mixing impeller, comprising:

a main shaft (21), wherein a conveying cavity (211) is formed in the main shaft (21) along the axial direction;

impeller main part (22), impeller main part (22) are fixed to be overlapped and are located on main shaft (21), cavity (221) have been seted up to impeller main part (22) inner wall, cavity (221) with carry chamber (211) intercommunication, just the lateral wall of impeller main part (22) seted up with overflow channel (222) of cavity (221) intercommunication.

2. The mixing impeller according to claim 1, wherein the main shaft (21) is provided with a plurality of first through holes (212) and a plurality of second through holes (213), the first through holes (212) are arranged at intervals around the peripheral wall of the main shaft (21) located in the cavity (221), and the second through holes (213) are arranged at intervals around the peripheral wall of the main shaft (21) located outside the cavity (221).

3. The mixing impeller according to claim 2, wherein the impeller main body (22) is provided with a central through hole (223) along the axial direction thereof, the main shaft (21) is arranged on the central through hole (223) in a penetrating manner, the cavity (221) comprises a plurality of sub-cavities which are arranged around the periphery of the central through hole (223) at intervals, and the plurality of sub-cavities are respectively communicated with the conveying cavity (211) through a plurality of first through holes (212).

4. The mixing impeller according to claim 2, characterized in that the impeller body (22) is provided with a central through hole (223) along its axial direction, the main shaft (21) is arranged on the central through hole (223) in a penetrating manner, the cavity (221) is an annular cavity, and the annular cavity is coaxially arranged with the impeller body (22).

5. The mixing impeller of claim 1, wherein the impeller body (22) is provided with a baffle (24) above the flow passage (222), the baffle (24) being inclined from the top end to the bottom end of the impeller body (22).

6. The mixing impeller according to claim 1 or 5, wherein the flow passage (222) is a plurality of flow holes, a plurality of blades (23) are provided at intervals on the peripheral side of the outer wall of the impeller main body (22), and at least one flow hole is provided in a region between two adjacent blades (23).

7. The mixing impeller of claim 6, wherein the flow passage (222) is a plurality of flow-through holes that slope from a top end of the impeller body (22) toward a bottom end of the impeller body (22) in a direction of an inner wall toward an outer wall of the impeller body (22).

8. The mixing impeller of claim 6, wherein the flow passage (222) is a plurality of flow-through holes, the flow-through holes being inclined from a bottom end of the impeller body (22) to a top end of the impeller body (22) in a direction from an inner wall of the impeller body (22) toward an outer wall; or (b)

The flow-through hole is arranged along the radial direction of the impeller main body (22).

9. The mixing impeller according to claim 1 or 5, characterized in that the flow passage (222) is a plurality of slits, the extending direction of which is along the rotation direction of the impeller main body (22), the outer wall peripheral side of the impeller main body (22) is provided with a plurality of blades (23) at intervals, and a plurality of the slits are provided around the side wall of the impeller main body (22) at intervals and in the region between every two adjacent blades (23).

10. The mixing impeller according to claim 9, characterized in that the slit is inclined from the top end of the impeller body (22) towards the bottom end of the impeller body (22) in the direction of the inner wall of the impeller body (22) towards the outer wall.

11. The mixing impeller according to claim 9, characterized in that the slit is inclined from the bottom end of the impeller body (22) to the top end of the impeller body (22) in the direction of the inner wall of the impeller body (22) towards the outer wall; or (b)

The slits are arranged in a radial direction of the impeller main body (22).

12. A pulping apparatus comprising:

a housing (1);

the mixing impeller (2) of any one of claims 1-11, the mixing impeller (2) being provided in the housing (1).

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