CN114522566A

CN114522566A - Shearing homogenizing structure

Info

Publication number: CN114522566A
Application number: CN202210218204.7A
Authority: CN
Inventors: 不公告发明人
Original assignee: Shanghai Guguang Engineering Technology Co ltd
Current assignee: Shanghai Guguang Engineering Technology Co ltd
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-05-24

Abstract

The invention is directed to a shear homogenizing structure (01) for processing one or more liquid fluid media and optionally one or more solid media. The structure includes: the turbine blade assembly comprises a flow guide assembly connecting piece (10), turbine blades (11), flow guide groove holes (12), a rotor disc (13), a shearing blade (14), a flow disturbing cavity (15), a flow guide assembly (16), a stator (20), circular holes or hole grooves (21) which are distributed annularly, a flow guide plate (30), a first discharging position (31), a second discharging position (32), a discharging hole (33), an interlayer sleeve (40) and a bearing cavity (41). The invention has the advantages that: the structure can realize high-strength shearing acceleration material mixing and enhancement of homogenization effect, meet batch mixing and optional continuous mixing effect, and realize long-time stable operation of high strength.

Description

Shearing homogenizing structure

Technical Field

The invention relates to the technical field of material mixing, shearing and homogenizing, in particular to a high-intensity shearing homogenizing or high-efficiency mixing homogenizing structure which needs high-intensity processing of one or more liquid fluid media and one or more optional solid media.

Background

The shearing, homogenizing and mixing are widely applied to food, pharmacy, daily chemical and chemical industries, such as powder fast dispersion, efficient emulsification of grease, fast reaction of chemical materials and the like. The process modes are divided into batch stirring mixing and continuous stirring mixing, and along with the expansion of the scale and the capacity of industrial production, higher requirements are also put forward on the mixing and homogenizing process, and particularly, a low-energy-consumption high-efficiency continuous mixing and homogenizing structure is required under the low-efficiency production mode of a batch tank of viscous media.

The batch mixing device comprises a tank and a stirring unit for mixing the media. The medium in the tank is circulated and mixed in the tank for a certain time to reach a desired state, and then the medium starts to be discharged to other containers.

Batch tank stirring is usually used for viscous media or media with a high dry matter content. Such as thickening agents, stabilizers, glues, which lead to the need for rapid dispersion and long stirring times, and in some cases, to the fact that the material is not fully utilized. Therefore, special devices are needed to achieve rapid dispersion, dissolution and homogenization, so as to improve the utilization rate of the materials and the mixing efficiency. Batch mixing shear units typically extend into the tank from the top of the tank or are located in the lower portion of the tank, while the discharge location is also located outside the tank, and additional pumps are required to evacuate the material from the tank. For highly viscous media, neither form provides sufficient intimate mixing of the materials.

Continuous mixing by agitation will generally involve circulation of a tank with agitation means and another vessel. The tank bottom is provided with a discharge port with certain pressure, and the discharge port is used for returning to the stirring tank or circulating with an external container. In the case of highly viscous materials, external circulation can become quite difficult.

Similar processing equipment enables batch tank agitation mixing and cyclic continuous mixing. In WO2006131800a1 a blender is disclosed which is provided with a blending unit at the bottom of the tank and a turbulator impeller structure extending into the tank. And a part of the mixed medium circulates in the tank through the turbulent flow structure, and a part of the mixed medium is discharged from the other outlet through the stirring unit. The outlet may be bypassed back into the tank or vented to an external vessel.

The disadvantage of this device is that the low-viscosity medium circulates largely in the tank without passing through the stirring unit, without the aim of rapid dispersion being achieved. For high viscosity media, such a structure is prone to cause material to concentrate at the mixing position, resulting in local discharge port blockage, and even the mixing structure needs to be redesigned for a medium with a specific viscosity. This approach is only suitable for batch or cyclic continuous mixing of low viscosity media, and is not suitable for flexible application of a wide range of viscous media.

Disclosure of Invention

In view of the drawbacks of the prior art, a first object of the present invention is to provide a shear homogenizing structure for one or more liquid fluid media and optionally one or more solid media for high shear mixing, using a specific rotor and stator structure in a unique shear zone, in combination with a variable speed stator-rotor system, achieving the same high efficiency of shearing of batches in a tank from low to high viscous media, pre-mixing of the materials and simultaneous multiple shear mixing. Especially the quick dispersion and dissolution of viscous powder and the quick emulsification of grease.

The second purpose is to set a local drainage device at the outlet area of the stator protruding out of the tank, combine batch tank mixing with external circulation continuous mixing, realize multiple times of in-tank shearing mixing and external circulation shearing mixing from low-viscosity media to high-viscosity media, and break the bottleneck that the high-viscosity media can only be processed in the batch tank.

According to the object of the invention, this is achieved by the following shear homogenizing structure. The shearing homogenizing structure is characterized in that: the rotor part is coaxial with the stator part and the center of the tank bottom base, the stator is positioned at the periphery of the rotor part, the top of the rotor part is provided with a flow guide assembly with a premixing effect, the flow guide assembly is connected with a rotor disc through a connecting piece with a reserved space, and the flow guide assembly is in a selectable blade form, a scraping blade form or a fixed covering head without the premixing effect. The turbine blades of the rotor part are uniformly distributed on the disc in an annular mode, and the top of each turbine blade is higher than that of the annular stator, so that turbulent flow mixing of upper media is achieved when the turbine blades are guided into the shearing cavity area. The stator is embedded in the annular groove of the base and protrudes out of the upper part of the tank bottom, so that the medium in the tank is sheared and mixed by the stator hole and then circulates in the large-flow tank. The medium flowing out of the stator hole is connected with a discharge hole through the limited covered discharge position of the outlet guide plate, and the cooling interlayer sleeve is preferably arranged at the periphery of the bearing cavity, so that high-strength stable operation is realized.

The upper part of a disc of the rotor part is provided with turbine blades which are uniformly distributed in an annular manner, diversion groove holes which are in the same direction as the diversion of the turbine blades are arranged below the turbine blades, a plurality of pairs of shearing blades are arranged on the lower part of the disc of the rotor, the tail ends of the blades correspond to the tail ends of the diversion groove holes, the above components and the diversion component which is selectable on the top of the rotor are coaxially connected into a whole through a driving connecting piece, and the center of the disc of the rotor is connected with a disc base through a sealing structure. From below the rotor disc is a closed shear zone structure. The shearing blades are annularly and uniformly distributed below the rotor disc, the edges of the blades are flush with the circumferential edge of the rotor disc, and the bottoms of the blades are attached to the narrow slit of the disc base.

In an efficient embodiment, the direction of the shear blades in the lower part of the rotor is at an angle to the direction of their centripetal force. The circumference of the stator is annularly and uniformly distributed with round holes or optional rectangular hole grooves, the opening area is set to be the limited opening range of the opening area, a certain included angle is formed between the axial direction of the preferable stator annular opening and the centripetal force direction of the position of the stator hole, the included angle corresponds to the included angle of the rotor blade, the flowing medium rotating at high speed of the rotor is forced to be pressed down to the stator hole through high-speed centrifugal force, the rotor blade rotates to complete the first high-strength shearing through the gap between the stator and the rotor, and then the medium is sprayed through the holes along the tangential direction height again, so that the secondary shearing effect is formed.

In another embodiment, the medium impacts on the annular seal at the contact position of the inner side of the stator and the disc base in a high-intensity shearing area, and preferably, the contact position of the inner side of the stator is provided with an annular protrusion to cover the seal, so that the impact of the medium ejected in parallel on the edge of the stator is finished.

The edge of the guide plate with an arc or square structure is tightly attached to the side surface of the stator, and the upper covering position of the guide plate is flush with the upper edge of the opening area; the bottom of the guide plate is fixed on the side wall of the tank body, the covering area of the guide plate is the local area of the discharging position of the annular opening of the stator, most of the sheared and homogenized material can flow out of the stator hole to continue the in-tank circulation, and a small part of the medium flows out of the discharging port outside the tank after passing through the guide plate, and the discharging port is provided with a stop valve which is closed and can be communicated with the side wall of the tank body to realize the in-tank circulation. In this respect, the invention can realize the internal and external dual-cycle shearing homogeneous structure, is very beneficial to high-efficiency shearing and mixing, and can meet the requirements of batch-tank processing of small batches and also realize large-scale cyclic continuous processing. The device quantity can be saved in the limited viscous medium processing to achieve the purpose of saving.

The outlet design can also be used for emptying the medium in the tank, the pressure of the diversion outlet does not need an additional outlet pump to pump the medium, if so, the wall scraping stirring can be assisted in the tank, and the material is guided to the shearing structure and is discharged through the diversion outlet.

The outer periphery of the bearing which runs at high speed is provided with an interlayer sleeve, heat exchange media or lubricating media including water and grease can be led in the interlayer sleeve, a medium outlet and a rotor sealing medium inlet can be connected in series, a flow detection element is arranged at a final outlet of the interlayer sleeve medium, and the flow of the cooling medium is related to the running of the shearing homogenizing structure.

By adopting the technical scheme, the shearing homogenizing device can be further configured to be directly connected with a driving shaft and a motor or driven by a belt pulley, and the shearing homogenizing device is driven to rotate at an adjustable rotating speed by adopting frequency conversion and speed regulation.

The invention may in another embodiment be further configured to: the shearing homogenizing structure is located in the center of the bottom of the cylindrical closed or open tank with a conical bottom, and the homogenizing structure and the side wall of the tank are provided with spoilers with the same height as the working volume to be matched with each other, so that the optimal mixing effect is achieved.

The beneficial technical effects which can be realized by the invention are as follows: the shearing homogenizing structure can realize the fast dispersion and dissolution of powder materials, particularly viscous powder, so that the powder materials cannot agglomerate and particles, and can accelerate the mixing and dissolving process of the materials under high-strength repeated shearing, thereby shortening the mixing time. The multilayer turbulence and drainage structure can accelerate the premixing of powder materials, also can provide drainage power of the shearing structure and enhance the mixing effect of secondary shearing jet flow.

The invention can also realize the following beneficial technical effects: aiming at the mixing of high-viscosity media, the mixing in a small-batch tank can be realized, and the internal and external double circulation can be realized by connecting with an external tank, so that the large-scale continuous processing of the high-viscosity media is met. The number of the configured mixing equipment is reduced to achieve the purpose of saving.

Drawings

The invention will be explained in more detail below with reference to the drawings, in which:

FIG. 1 shows a basic sketch of a sheared homogeneous structure with partial flow outlets

FIG. 2 illustrates an isometric cross-sectional view of a shear homogenizing structure with partial flow outlets

FIG. 3 shows a cross-sectional view of a stator structure projection

FIG. 4 shows a block diagram of a stator ring hole and rotor blade configuration

FIG. 5 shows a basic sketch of a rotor turbine flow guiding assembly and a partial flow guiding outlet

FIG. 6 shows a flow diagram of an alternative embodiment for mixing as a batch mix and discharge cycle

Detailed Description

In the description of the drawings, the same or similar components are denoted by the same reference numerals in different drawings. Accordingly, not all details of the drawings are described.

Fig. 1 shows the appearance of the shear homogenizing structure and the circulation draught outlet. In order to improve the mixing effect further on the basis of the prior art, an efficient shear homogenizing mixing structure 01 is provided, which comprises a rotor part and a stator part 20. The rotor portion is coaxial with respect to the stator 20, and the stator 20 is located at the rotor portion periphery. To further enhance the shear mixing effect of the viscous product, a deflector assembly 16 is optionally added to the upper portion of the rotor section and is connected to the rotor disk 13 by a connecting member 10. The optional flow directing assembly 16 is in the form of an optional blade, wiper blade, or fixed covering head for different product viscosities and different properties. The rotor part adopts turbine blades 11, and the top is higher than the top of the stator 20, and a flow guide assembly combined with the top of the rotor is used for enhancing the fluidity of the mixed medium. The surface of the annular stator 20 outside the rotor is provided with holes with different shapes, and the area of the holes with different shapes is selected as a first discharging position 31 according to the properties of the mixed medium. Referring to fig. 2, the stator 20 is shown embedded in an annular groove of the base 51. The first discharging position 31 covered by the outlet guide plate 30 is connected with the discharging port 33, the interlayer sleeve 40 is positioned at the periphery of the bearing cavity 41, and a cooling medium is filled in the interlayer sleeve to ensure that the bearing continuously keeps stable operation at the working temperature. The above rotor structures are coaxially connected together by a drive connection 44, typically connected to an external motor or pulley, not shown.

In another alternative embodiment, the cooling medium is connected to the bottom port of the side surface of the jacket 40 and enters the jacket 40 through the upper port of the side surface, or the optional medium outlet port of the jacket 40 is connected in series with the medium inlet port of the rotor seal 43, and the final outlet port of the cooling medium is provided with a flow rate detection element.

Fig. 2 shows an isometric cross-sectional view of a shear homogenizing structure with a partial flow exit. The rotor structure can be clearly seen to comprise a rotor disc 13, the upper part of the rotor disc is provided with annular and evenly distributed turbine blades 11, and guide slot holes 12 are arranged below the turbine blades. The upper medium enters the rotor area after being partially assisted by the optional flow guide assembly 16, and enters the interior of the rotor through the flow guide slot hole 12 in combination with the arc-shaped turbine blade 11, and the medium is in a high-pressure state in a semi-closed area formed by the rotor disc 13 and the base 42. The rotor disc 13 has shear blades 14 at its lower part, and the medium is subjected to high intensity shear mixing between the blades 14 rotating at high speed and the stator 20 with holes. Under the centrifugal force of the shearing blades 14 and the high pressure force of the shearing semi-closed area, the medium is ejected out of the hole slots of the stator 20 and enters the tank to be circulated again for batch mixing.

In combination with the structure shown in fig. 2 and 5, an optional guide plate 30 is used for realizing continuous or external circulation processing mixing, the edge of the guide plate 30 is fixed on the side surface of the stator 20, the bottom of the guide plate 30 is fixed on the side wall of the tank body 50, the covering area of the guide plate 30 is a partial area of the second annular opening discharging position 32, and the upper covering position is flush with the upper edge of the opening area. This configuration provides pressure for the first discharge position 31 for discharge or circulation, the first discharge position 31 being located at the lowest position of the tank wall 50 and communicating with the discharge port 33, the discharge port 33 being provided with a stop valve or alternatively communicating with the tank sidewall 50.

Fig. 3 shows the annular seal 23 on the inside of the stator 20 in contact with the disc seat 42 and the annular projection on the inside of the stator 20 in contact with the seal. The medium impacts the annular seal 23 at the contact position of the inner side of the stator 20 and the disk base 42 in a high-intensity shearing area, and the protruding structure is used for protecting the annular seal 23.

Figure 4 shows a block diagram of the stator ring hole and rotor blade configuration. For the sake of clarity, the right half is a top view of the structure, the impeller without the guide component has arc-shaped turbine blades 11, and the crescent-shaped guide hole slots 12 are located below the turbine blades 11. The left side is the internal cross-section structure of the rotor, circular holes or optional rectangular hole grooves 21 are annularly and uniformly distributed on the periphery of the annular stator 20, and the open area of the limited hole grooves 21 is combined with jet flow shearing after the medium is sheared to form a unique mixing effect. The axial of stator annular trompil 21 becomes certain angle, and this contained angle corresponds with the contained angle of rotor blade 14, forces the flowing medium of rotor high-speed rotation down to press down to the stator hole through high-speed centrifugal force, and the rotor blade is rotatory to accomplish the high intensity through stator and rotor clearance after shearing, and the medium is highly through the hole injection along the tangential direction once more, forms the effect of cuting once more.

FIG. 6 shows a flow diagram of another alternative embodiment for mixing as a batch mixing and discharge cycle. The media is located in the tank 60 with the shear homogenizing structure located in the center of the bottom of the tank and the tank bottom side wall 50 having a certain taper angle in combination with the homogenizing structure. The side wall of the tank body is provided with a liquid adding port or a liquid returning port 54, the bottom of the tank body passes through the outlet 31 of the discharging position behind the guide plate 30 and is provided with a first valve 51, and the front part of the first valve 51 is provided with a liquid returning pipe 54 and a second valve 52.

When the mixing arrangement is used for batch mixing, the first valve 51 is in a closed state and the second valve 52 is in an open state, and the medium is circulated in the tank. The viscous medium strengthens the turbulence intensity in the tank and the conversion of upper and lower media under the action of the flow guide assembly 16, the medium part which passes through the shearing and homogenizing structure reflows through the second 32 discharge positions at the bottom of the tank, and the medium part turns to the upper layer of the medium along the conical side wall and continues the circulation in the tank. The remaining part of the medium passing through the shearing and homogenizing structure passes through the first discharging position 31 and enters the tank through the return pipe 54.

When the mixing arrangement is used for recirculating mixing or discharge, the first valve 51 is in an open state and the second valve 52 is in a closed state, and the media portion is recirculated within the tank. The viscous medium strengthens the turbulence intensity in the tank and the conversion between upper and lower media under the action of the flow guide assembly 16, the medium part which passes through the shearing and homogenizing structure flows back through the discharge position II 32 at the bottom of the tank and turns over to the upper layer of the medium along the conical side wall, and then the circulation in the tank is continued. The remaining part of the medium passing through the shearing and homogenizing structure is discharged into the outer tank through the first discharging position 31, and the medium flowing back from the outer tank flows back into the tank through the liquid adding port 55.

In the above embodiment, the medium has no stagnation region during mixing and discharging, and batch mixing and continuous mixing in the tank are flexibly satisfied. Is more suitable for large-scale processing and implementation of viscous products.

Claims

1. A shearing homogenizing combined device structure (01) is positioned at the center of the bottom of a tank body (50); the structure (01) includes: the device comprises a flow guide assembly connecting piece (10), turbine blades (11), flow guide slot holes (12), a rotor disc (13), a shearing blade (14), a flow disturbing cavity (15), a flow guide assembly (16), a stator (20), a flow guide plate (30) of a flow guide structure, a first discharging position (31), a second discharging position (32), an interlayer sleeve (40) of a driving connecting piece and a bearing cavity (41); the method is characterized in that: the rotor part is coaxial relative to the stator (20), the stator (20) is located at the periphery of the rotor part, a flow guide assembly (16) of the rotor part is connected with a rotor disc (13) through a connecting piece (10), the flow guide assembly (16) is in a selectable blade form, a scraping blade form or a fixed covering head, the top of a turbine blade (11) of the rotor part is higher than that of the stator (20), the stator (20) is embedded in an annular groove of a base (51), a first discharging position (31) covered by an outlet flow guide plate (30) is connected with a discharging hole (33), and an interlayer sleeve (40) is located at the periphery of a bearing cavity (41).

2. The shear homogenizing structure of claim 1, wherein: the rotor structure comprises a rotor disc (13), wherein the upper part of the rotor disc is provided with turbine blades (11) which are uniformly distributed in an annular manner, a flow guide slot hole (12) is formed below the turbine blades, the lower part of the rotor disc is provided with a shearing blade (14), the top of the rotor disc is provided with an optional flow guide assembly (16) through a flow guide assembly connecting piece (10), and the above components are coaxially connected into a whole through a driving connecting piece (44); the center of the rotor disc (13) is connected with the disc base (42) through a seal (43).

3. A shear homogenizing structure according to claim 2, wherein: the upper stream of the rotor structure disc (13) is provided with a crescent flow guide slot hole (12), the tail end of the slot hole corresponds to a plurality of pairs of shearing blades (14), the shearing blades (14) are annularly and uniformly distributed below the rotor disc (13), the edge of the shearing blade (14) is flush with the circumferential edge of the rotor disc (13), and the bottom of the shearing blade (14) is in narrow-slit fit with the disc base (42).

4. A shear homogenizing structure according to claims 2 and 3, characterized in that: the direction of the blade (14) forms an included angle with the centripetal force direction of the blade at the tail end of the rotor disc (13).

5. The shear homogenizing structure of claim 1, wherein: the periphery of the stator (20) is annularly and uniformly distributed with round holes 21 or optional rectangular hole slots or holes formed by combining the round holes and squares, and the open area of the holes is 15-45% of the open area; the axial direction of the stator annular opening (21) forms an included angle with the centripetal force direction of the position of the stator hole.

6. The shear homogenizing structure of claim 5, wherein: an annular seal (23) is arranged at the contact position of the inner side of the stator (20) and the disc base (42), and an annular protrusion (22) is arranged at the contact position of the inner side of the stator (20).

7. A shear homogenizing structure according to claims 1 and 5, characterized in that: the edge of an optional guide plate (30) is fixed on the side surface of the stator (20), the bottom of the guide plate (30) is fixed on the side wall of the tank body (50), the coverage area is 15% -45% of the area of the second annular opening discharging position (32), and the upper coverage position is flush with the upper edge of the opening area; the first discharging position (31) is located at the lowest position of the tank wall (50) and is communicated with the discharging port (33), and the discharging port (33) is provided with a stop valve or is optionally communicated with the side wall (50) of the tank body.

8. The shear homogenizing structure of claim 1, wherein: the interlayer sleeve (40) is positioned at the periphery of the bearing cavity (41), and is fixed or can alternatively move axially or rotate; heat exchange media or lubricating media including water and grease can be introduced into the interlayer sleeve (40).

9. The shear homogenizing structure of claim 8, wherein: the medium connecting position is a lower inlet and upper outlet connecting port or an upper inlet and lower outlet connecting port which is independent on the side surface of the interlayer sleeve (40), or an optional medium outlet of the interlayer sleeve (40) is connected with a medium inlet of the rotor seal (43) in series; the final outlets of the sandwich jacket (40) media, either individually or in series, are configured with flow sensing elements.