CN219377994U - Winnowing grading plant and granulation equipment - Google Patents
Winnowing grading plant and granulation equipment Download PDFInfo
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- CN219377994U CN219377994U CN202320786749.8U CN202320786749U CN219377994U CN 219377994 U CN219377994 U CN 219377994U CN 202320786749 U CN202320786749 U CN 202320786749U CN 219377994 U CN219377994 U CN 219377994U
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Abstract
The utility model relates to the field of granulation equipment, in particular to a winnowing classification device and granulation equipment, wherein the winnowing classification device comprises: one end of the spiral conveying mechanism is a material receiving end and is used for extending into a discharge hole of the granulating tower, and the other end of the spiral conveying mechanism is a material feeding end; one side of the winnowing box is communicated with the feeding end of the spiral conveying mechanism, the upper part of the winnowing box is provided with a returning port for communicating with a recovery port of the granulating tower, and the lower part of the winnowing box is provided with an air inlet communicated with an external air source; the winnowing bed is arranged in the middle of the winnowing box and is positioned below the spiral conveying mechanism; wherein, the unqualified fine particles on the winnowing bed are suitable for being blown back to the granulating tower through the material returning opening by the air inlet of the air inlet. The winnowing and grading device can recycle unqualified fine particles on line in the conveying process of mixed particles, simplifies the screening steps of subsequent qualified particles, and is beneficial to improving the production efficiency.
Description
Technical Field
The utility model relates to the field of granulation equipment, in particular to a winnowing classification device and granulation equipment.
Background
DF (Dry Flowable), namely a dry suspending agent, is one of pesticide formulations, is dehydrated by an aqueous suspending agent, and is generally processed by the following process flow: adding raw materials, auxiliary agents, fillers and water into a proportioning tank, uniformly stirring, coarsely crushing by a high-speed shearing machine, finely grinding by a two-stage sand mill, adding a granulating auxiliary agent after grinding, and drying and granulating by a pressure spray drying tower.
The existing DF production device generally adopts a pressure spray drying tower, the height of a main granulating tower is generally 25-30 m, the granulating process mainly depends on spray nozzles for spraying, the drying and one-time granulating are carried out in the dropping process of liquid drops, the drying is realized by long height, the particle size of the formed particles is uncontrollable, the qualification rate of the finished products is about 70-80%, and the unqualified products are mainly fine powder. Therefore, the granules output from the prilling tower also require further emphasis on sieving the fine granules. In the conventional fine particle screening and returning method, for example, patent CN203291819U discloses that fine particles are screened out by a vibration classifier and returned to a granulating tower by a returning device. However, since the equipment required for this method is complicated and the fine particle treatment process is complicated, it is highly desirable to design a classification apparatus capable of recovering the fine particles on line and recovering the fine particles into the granulation tower simply and efficiently.
Disclosure of Invention
The utility model aims to provide a winnowing classification device which can recycle unqualified fine particles on line so as to improve production efficiency.
In order to solve the technical problems, the present utility model provides a winnowing classification device, including: one end of the spiral conveying mechanism is a material receiving end and is used for extending into a discharge hole of the granulating tower, and the other end of the spiral conveying mechanism is a material feeding end; one side of the winnowing box is communicated with the feeding end of the spiral conveying mechanism, the upper part of the winnowing box is provided with a returning port for communicating with a recovery port of the granulating tower, and the lower part of the winnowing box is provided with an air inlet communicated with an external air source; the winnowing bed is arranged in the middle of the winnowing box and is positioned below the spiral conveying mechanism; wherein, the unqualified fine particles on the winnowing bed are suitable for being blown back to the granulating tower through the material returning opening by the air inlet of the air inlet.
Further, the screw conveying mechanism includes: the rotating shaft penetrates through the winnowing box, one end of the rotating shaft is suitable for extending into the discharge hole, and the other end of the rotating shaft is suitable for being linked with a driving mechanism; the first spiral conveying part is arranged on a rotating shaft in a conveying cavity between the winnowing box and the discharge hole and is suitable for receiving mixed particles sent out from the granulating tower; and the second spiral conveying part is arranged on a rotating shaft in the winnowing box and is suitable for conveying residual particles on the winnowing bed after winnowing classification out of the winnowing box.
Further, the second spiral conveying part is suitable for being spirally wound on the periphery of the rotating shaft in a suspending manner, and a plurality of support columns are arranged towards the rotating shaft; the second spiral conveying part, the rotating shaft and the supporting columns form a gap around the second spiral conveying part, the rotating shaft and the supporting columns, and the gap is suitable for accommodating passing of unqualified fine particles blown up by the air inlet.
Further, a discharge baffle is arranged at the end part of the first spiral conveying part, which is positioned in the discharge hole.
Further, the winnowing classification device further comprises: the material receiving box is arranged on one side of the winnowing box along the conveying direction of the spiral conveying mechanism and is suitable for receiving residual particles sent out from the winnowing box.
Further, an intermediate baffle plate is arranged between the winnowing box and the material receiving box, and is provided with an avoidance hole for accommodating the rotating shaft to pass through; the material receiving baffle is adjustably arranged below the middle partition plate.
Further, the winnowing bed is provided with a plurality of ventilation holes.
Further, a water outlet is arranged at the bottom of the winnowing box.
In yet another aspect, the present utility model also provides a granulation apparatus comprising: a winnowing classification device as described above; and the side surface of the tower body of the granulating tower is provided with a discharge hole connected with the spiral conveying mechanism and a recovery hole communicated with the material returning hole.
Further, a fluidized bed is arranged below the discharge port in the granulation tower, and a plurality of swirl guide holes are formed in the fluidized bed.
The utility model has the beneficial effects that the air separation box can form air flow from bottom to top through the air inlet at the lower part, and unqualified fine particles in the mixed particles sent out by the spiral conveying mechanism on the air separation bed are blown back into the granulating tower again through the material returning opening at the upper part to continue granulating processing, so that unqualified fine particles can be recovered on line in the conveying process of the mixed particles, the screening step of the follow-up qualified particles is simplified, and the production efficiency is improved.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present utility model 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 utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of a winnowing classification device of the present utility model;
FIG. 2 is a schematic cross-sectional view of a winnowing classification apparatus according to the utility model;
FIG. 3 is a perspective view of the first and second screw conveyor portions of the present utility model;
FIG. 4 is a front view and a partially enlarged schematic illustration of the granulation apparatus of the present utility model;
fig. 5 is a schematic partial cross-sectional view of the granulation apparatus of the present utility model.
In the figure:
the air separation box 1, a material returning opening 11, an air inlet 12, a water outlet 13, a spiral conveying mechanism 2, a rotating shaft 21, a first spiral conveying part 22, a second spiral conveying part 23, a supporting column 24, a discharging baffle 25, an air separation bed 3, an air ventilation hole 31, a material receiving box 4, an intermediate partition plate 5, an avoiding hole 51, a material receiving baffle 52, a granulating tower 6, a discharging hole 61, a recycling hole 62, a fluidized bed 63 and a rotational flow guide hole 64.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
As shown in fig. 1 and 2, the present utility model provides a winnowing classification apparatus, including: one end of the spiral conveying mechanism 2 is a material receiving end and is used for extending into a discharge hole 61 of the prilling tower 6, and the other end of the spiral conveying mechanism is a material feeding end; the air separation box 1 is provided with a material returning opening 11 which is communicated with a recycling opening 62 of the prilling tower 6 at the upper part and an air inlet 12 which is communicated with an external air source at the lower part, and one side of the air separation box is communicated with the feeding end of the spiral conveying mechanism 2; the winnowing bed 3 is arranged in the middle of the winnowing box 1 and is positioned below the spiral conveying mechanism 2; wherein the unqualified fine particles on the winnowing bed 3 are suitable for being blown back to the granulation tower 6 through the material returning opening 11 by the air inlet of the air inlet 12.
In this embodiment, the air classification box 1 can form the air flow from bottom to top through the air inlet 12 at the lower part, and blow the unqualified fine particles in the mixed particles sent out by the spiral conveying mechanism 2 on the air classification bed 3 back into the granulating tower 6 through the material returning opening 11 at the upper part for continuous granulating processing, so as to realize online recovery of the unqualified fine particles in the conveying process of the mixed particles, simplify the screening step of the follow-up qualified particles, and be beneficial to improving the production efficiency.
In the embodiment, unqualified fine particles are screened and recovered by adopting a winnowing mode, so that separation of the unqualified fine particles and residual large particles is realized, and the particles can be further dried, thereby controlling the moisture of finished product particles.
As shown in fig. 3, in the present embodiment, the screw conveyor mechanism 2 includes: a rotating shaft 21 penetrating through the winnowing box 1, one end of the rotating shaft being adapted to extend into the discharge hole 61, and the other end being adapted to be linked with a driving mechanism; a first screw conveyor 22 provided on a rotation shaft 21 in a conveying chamber between the air box 1 and the discharge port 61, and adapted to receive the mixed particles fed from the granulation tower 6; and a second spiral conveying part 23, which is arranged on a rotating shaft 21 in the winnowing box 1 and is suitable for conveying the residual particles on the winnowing bed 3 after winnowing classification out of the winnowing box 1.
In this embodiment, the driving mechanism may be a driving sprocket at the output end of a cycloidal pin gear reducer (including a motor) (model number xwdbo.75-2-23), and the driving sprocket is linked with a driven sprocket at the end of the rotating shaft 21 far from the discharge port 61 through a roller chain, so as to drive the rotating shaft 21 to drive the first screw conveyor 22 and the second screw conveyor 23 to rotate and convey.
In this embodiment, the second spiral conveying portion 23 is adapted to be spirally wound around the outer periphery of the rotating shaft 21 in a suspended manner, and a plurality of support columns 24 are disposed toward the rotating shaft 21; wherein the second screw conveyor 23, the rotating shaft 21 and the supporting columns 24 form a clearance around, and are suitable for accommodating the passing of the disqualified fine particles blown up by the air inlet.
In this embodiment, the spiral conveying part on the rotating shaft 21 is divided into two parts, so that conveying requirements under different working conditions can be met, and the middle hollow design of the second spiral conveying part 23 is convenient for unqualified fine particles to pass through the upper material returning port 11 to return to the prilling tower 6 under the action of the air flow from bottom to top.
In this embodiment, the end of the first screw conveyor 22 located in the discharge port 61 is provided with a discharge baffle 25.
In this embodiment, the discharge baffle 25 may enable the end of the first screw conveying portion 22 located in the discharge port 61 to grasp more material particles in the prilling tower 6, so as to increase the discharge speed.
In this embodiment, the air classification device further includes: and a receiving box 4 arranged at one side of the winnowing box 1 along the conveying direction of the spiral conveying mechanism 2 and suitable for receiving the residual particles sent out from the winnowing box 1.
In this embodiment, the receiving box 4 is adapted to receive the remaining particles, and pass through other particle size screening devices to screen out qualified particles and coarse particles in the remaining particles, and send the coarse particles back to the prilling tower 6 for further processing after the coarse particles are crushed, so that the particle sizes of the final product particles all meet the requirements.
In this embodiment, an intermediate partition plate 5 is disposed between the winnowing box 1 and the material receiving box 4, and a avoiding hole 51 for accommodating the rotation shaft 21 to pass through is formed in the intermediate partition plate; a receiving baffle plate 52 is adjustably arranged below the middle partition plate 5.
In the present embodiment, the discharge speed of the remaining particles after the classification by air separation on the air separation bed 3 can be controlled by adjusting the installation height of the material receiving baffle plate 52 to control the recovery rate of the unqualified fine particles on the air separation bed 3.
In this embodiment, the air separation bed 3 is provided with a plurality of ventilation holes 31, so that the air flow entering at the air inlet 12 at the lower part of the air separation bed 3 passes through the air separation bed 3 to form a bottom-up air flow.
In this embodiment, a water outlet 13 is disposed at the bottom of the air separation box 1, so that the cleaning solution is conveniently discharged when the air separation box 3 is cleaned.
In the present embodiment, the winnowing box 1 is further provided with at least one observation window for observing the accumulation of the residual particles on the winnowing bed 3 so as to adjust the conveying speed of the screw conveying mechanism 2; the winnowing box 1 is also provided with a plurality of maintenance windows, and each maintenance window is in a sealed and closed state when in work, and can be outwards opened for maintenance when maintenance is needed.
Example 2
As shown in fig. 4, on the basis of the above-described embodiment 1, this embodiment also provides a granulating apparatus comprising: a winnowing classification device as described above; and a granulation tower 6, wherein a discharge port 61 connected with the screw conveying mechanism 2 and a recovery port 62 communicated with the material returning port 11 are arranged on the side surface of the tower body.
In an alternative embodiment, as shown in fig. 5, a fluidized bed 63 is disposed below the discharge port 61 in the prilling tower 6, and a plurality of swirl guiding holes 64 are formed therein.
In this embodiment, the air flow entering from the lower part of the granulation tower 6 forms a cyclone with a special track through the cyclone guide hole 64 on the fluidized bed 63, the fine particles are blown to the upper part of the fluidized bed 63 and are agglomerated with the material (slurry) sprayed by the high-pressure nozzle at a high speed to form coarse particles, the coarse particles fall on the fluidized bed 3, and are pushed by the cyclone with the special track to enter the conveying cavity of the spiral conveying mechanism 2 at the discharge hole 61, are conveyed into the air classification device for air classification, and the unqualified fine particles are received by the recovery hole 62 communicated with the air classification device to reenter the cyclone state to continuously agglomerate with the material (slurry) sprayed by the high-pressure nozzle at a high speed.
In summary, the spiral conveying part on the rotating shaft 21 is divided into two parts, so that conveying requirements under different working conditions can be met, and the hollow design of the middle part of the second spiral conveying part 23 is convenient for unqualified fine particles to pass through the upper material returning opening 11 to return to the prilling tower 6 under the action of air flow from bottom to top. The discharge baffle 25 can enable the end part of the first spiral conveying part 22 positioned in the discharge hole 61 to grasp more material particles in the granulation tower 6, so as to improve the discharge speed. The discharge speed of the residual particles on the air separation bed 3 after the air separation classification can be controlled by adjusting the installation height of the material receiving baffle plate 52 so as to control the recovery rate of the unqualified fine particles on the air separation bed 3.
With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.
Claims (10)
1. An air classification device, comprising:
one end of the spiral conveying mechanism (2) is a material receiving end and is used for extending into a discharge hole (61) of the prilling tower (6), and the other end of the spiral conveying mechanism is a material feeding end;
one side of the winnowing box (1) is communicated with the feeding end of the spiral conveying mechanism (2), the upper part of the winnowing box is provided with a material returning opening (11) for communicating a recovery opening (62) of the granulating tower (6), and the lower part of the winnowing box is provided with an air inlet (12) communicated with an external air source;
the winnowing bed (3) is arranged in the middle of the winnowing box (1) and is positioned below the spiral conveying mechanism (2); wherein the method comprises the steps of
The unqualified fine particles on the winnowing bed (3) are suitable for being blown back to the granulating tower (6) through the material returning opening (11) by the air inlet of the air inlet (12).
2. The air classification apparatus according to claim 1, wherein,
the screw conveyor (2) comprises:
a rotating shaft (21) which penetrates through the winnowing box (1), one end of the rotating shaft is suitable for extending into the discharging hole (61), and the other end of the rotating shaft is suitable for being linked with a driving mechanism;
a first screw conveying part (22) which is arranged on a rotating shaft (21) in a conveying cavity between the winnowing box (1) and the discharging hole (61) and is suitable for receiving mixed particles sent out from the granulating tower (6);
and the second spiral conveying part (23) is arranged on a rotating shaft (21) in the winnowing box (1) and is suitable for conveying out residual particles on the winnowing bed (3) after winnowing classification out of the winnowing box (1).
3. The air classification apparatus according to claim 2, wherein,
the second spiral conveying part (23) is suitable for being spirally wound on the periphery of the rotating shaft (21) in a suspending manner, and a plurality of support columns (24) are arranged towards the rotating shaft (21); wherein the method comprises the steps of
The second spiral conveying part (23), the rotating shaft (21) and the supporting columns (24) surround a formed gap, and are suitable for accommodating passing of disqualified fine particles blown up by the air inlet.
4. A pneumatic classification apparatus as claimed in claim 3, wherein,
the end part of the first spiral conveying part (22) positioned in the discharge hole (61) is provided with a discharge baffle (25).
5. The air classification apparatus of claim 2, further comprising:
the material receiving box (4) is arranged on one side of the winnowing box (1) along the conveying direction of the spiral conveying mechanism (2) and is suitable for receiving residual particles sent out from the winnowing box (1).
6. The air classification apparatus according to claim 5, wherein,
an intermediate baffle plate (5) is arranged between the winnowing box (1) and the material receiving box (4), and is provided with an avoidance hole (51) for accommodating the rotating shaft (21) to pass through;
a material receiving baffle plate (52) is adjustably arranged below the middle partition plate (5).
7. The air classification apparatus according to claim 1, wherein,
a plurality of ventilation holes (31) are formed in the winnowing bed (3).
8. The air classification apparatus according to claim 1, wherein,
the bottom of the winnowing box (1) is provided with a water outlet (13).
9. A granulation apparatus, characterized by comprising:
a wind separation classification apparatus according to any one of claims 1 to 8; and
the side surface of the granulating tower (6) is provided with a discharge hole (61) connected with the spiral conveying mechanism (2), and a recovery hole (62) communicated with the material returning hole (11).
10. The granulation apparatus as claimed in claim 9, characterized in that,
a fluidized bed (63) is arranged below the discharge hole (61) in the granulation tower (6), and a plurality of rotational flow guide holes (64) are formed in the fluidized bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320786749.8U CN219377994U (en) | 2023-04-11 | 2023-04-11 | Winnowing grading plant and granulation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320786749.8U CN219377994U (en) | 2023-04-11 | 2023-04-11 | Winnowing grading plant and granulation equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219377994U true CN219377994U (en) | 2023-07-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320786749.8U Active CN219377994U (en) | 2023-04-11 | 2023-04-11 | Winnowing grading plant and granulation equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219377994U (en) |
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2023
- 2023-04-11 CN CN202320786749.8U patent/CN219377994U/en active Active
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