Vortex target type jet mill device

Abstract

The utility model relates to the technical field of material grinding equipment, in particular to a vortex target type jet mill device which comprises a grinding module and a grading module, the grinding module comprises an annular inner target lining and an annular outer target lining, a grinding channel is formed between the inner target lining and the outer target lining, and target teeth are arranged on the opposite side faces of the inner target lining and the outer target lining; the outer target lining is connected with a plurality of guniting pipes; a grading chamber of the grading module communicates with the grinding channel through an ascending pipeline, and the grading chamber is connected with a fine powder suction pipe. During use, slurry enters the grinding channel at a high speed through the slurry spraying pipe and collides with the target teeth on the side walls of the inner target lining and the outer target lining, and therefore the target type jet mill function that the slurry collides with the target teeth to be broken is achieved; in addition, the slurry collides with the target teeth and rebounds, and the rebounded slurry collides with the newly sprayed slurry, so that the collision type airflow milling effect of the relative collision of slurry particles is achieved; and particle swirling flow carried by steam is generated by the wall attachment effect of the fluid slurry, so that the effect of a vortex mill is also achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of material grinding equipment, and particularly relates to a vortex target type air classifier mill device. Background Art

[0002] The sand mill is currently the most widely applicable, advanced and efficient grinding equipment for materials. Generally, it can be divided into horizontal sand mills, basket sand mills, vertical sand mills, etc. The grinding chamber of the sand mill is relatively narrow, the gap between the stirring rods is small, and the grinding energy is relatively concentrated. With a high-performance cooling system and an automatic control system, continuous processing and continuous discharging of materials can be realized, greatly improving the production efficiency. Especially, due to the maturity of the design and manufacturing technology of large horizontal sand mills in recent years, it has become a reality to apply them to the ultrafine grinding of mineral powder.

[0003] Previously, the grinding technologies developed by the inventors of the present utility model are as follows: ① A vertical nano sand mill, a sand grinding system and a sand grinding method disclosed in the Chinese patent document with the publication number CN116078495A; ② A sand grinding system with recycled grinding media disclosed in the Chinese patent document with the publication number CN114011529A; ③ A compartment continuous grinding and dispersing vibrating ball mill, a grinding system and a grinding method disclosed in the Chinese patent document with the publication number CN114632593A; ④ A target type circulating multi-stage air classifier mill device disclosed in the Chinese patent document with the publication number CN217796546U; ⑤ A vertical nano sand mill and a sand grinding system disclosed in the Chinese patent document with the publication number CN219334409U; ⑥ An ultrasonic vortex mill and a nano clay preparation system with the mill disclosed in the Chinese patent document with the publication number CN209034524U; all are grinding technologies created by the inventors of this application.

[0004] In particular, as disclosed in the Chinese patent document with the publication number CN109174386B, an ultrasonic vortex mill and a nano clay preparation system with the mill, the grinding channel of the mill is arranged in a vortex shape. One end of the grinding head is fixedly connected to the output shaft of the rotating mechanism, and the other end is provided with a plurality of grinding parts and inserted into the grinding channel. The mill is also provided with an ultrasonic vibrator, and the ultrasonic vibrator is installed in the grinding channel. A target lining with target teeth realizes grinding through the rotation of the grinding parts, purely relying on the friction between the material and the target teeth for crushing. The material moves forward by relying on the rotation of the grinding parts in the grinding channel. Therefore, the moving speed of the material is relatively slow, and the above structure is complex and the cost is high. Summary of the Invention

[0005] In view of the above technical problems existing in the prior art, the present utility model provides a vortex target type air classifier mill device.

[0006] To achieve the above object, the present utility model provides the following technical solutions:

[0007] Provided is a vortex target type airflow mill device, including a grinding module and a classification module. The grinding module includes an annular inner target lining and an outer target lining. An annular grinding channel is formed between the inner target lining and the outer target lining. Target teeth are provided on the facing sides of the inner target lining and the outer target lining; multiple slurry spraying pipes are connected to the inner target lining and / or the outer target lining, and the multiple slurry spraying pipes are circumferentially spaced apart around the grinding channel; the slurry spraying pipes are arranged radially inclined relative to the grinding channel;

[0008] The classification module includes a classification chamber located above the grinding module. The classification chamber is communicated with the grinding channel via a rising pipe, and a fine powder suction pipe is connected to the classification chamber.

[0009] As a further optional solution, a classifier is provided in the classification chamber. The classifier includes a classification impeller rotatably installed in the middle of the classification chamber, classification blades fixed outside the classification impeller, and a classification motor fixed outside the classification chamber and used to drive the classification impeller to rotate. The fine powder suction pipe is connected above the corresponding classification impeller of the classification chamber.

[0010] As a further optional solution, a coarse powder falling pipe is further connected to the classification chamber, and the coarse powder falling pipe is communicated with the slurry spraying pipe.

[0011] As a further optional solution, the upper ends of the rising pipe and the coarse powder falling pipe are connected to the bottom of the classification chamber, and the upper port of the rising pipe is closer to the classifier than the upper port of the powder falling pipe.

[0012] As a further optional solution, the rising pipe and the coarse powder falling pipe are arranged obliquely.

[0013] As a further optional solution, the inner target lining and the outer target lining are in a U shape with a closed bottom and an open top, and the rising pipe is an annular pipe; or the top of the grinding channel is sealed by a circular plate, and the rising pipe includes multiple separated pipe bodies, one end of which is connected to the circular plate and the other end is connected to the classification chamber.

[0014] As a further optional solution, the target teeth are uniformly or non-uniformly arranged on the inner wall of the inner target lining / outer target lining.

[0015] As a further optional solution, the grinding module is provided with a support to support the grinding module.

[0016] As a further optional solution, the slurry spraying pipe is a supersonic nozzle.

[0017] As a further alternative, the spraying pipe is connected with a slurry-steam mixer for mixing the raw materials with high-temperature steam. The slurry-steam mixer includes a feeding module, a mixing chamber and a spraying and discharging channel. The feeding module includes a slurry feeding channel for inputting slurry and a steam channel for inputting high-temperature and high-pressure steam. The spraying and discharging channel, the slurry feeding channel and the steam channel are all communicated with the mixing chamber. The spraying and discharging channel is provided with a Laval nozzle. The feeding module includes a slurry feeding pipe body and a steam pipe body. The slurry feeding channel is located in the slurry feeding pipe body. The slurry feeding pipe body is arranged in the steam pipe body, and the annular channel formed between the outer wall of the slurry feeding pipe body and the inner wall of the steam pipe body serves as the steam channel. The discharging end of the slurry feeding channel is provided with a swirl guiding sleeve for swirling and guiding the output of the slurry. The end of the steam pipe body is provided with an atomizing nozzle which is simultaneously communicated with the discharging ports of the slurry feeding pipe body and the steam pipe body.

[0018] Advantages of the present utility model:

[0019] In the use of a vortex target type air classifier mill device of the present utility model, the slurry enters the grinding channel at a high speed through the spraying pipe and impacts the target teeth on the inner target lining and the side wall of the outer target lining. Therefore, it has the function of a "target type air classifier mill" in which the slurry impacts and breaks the target teeth. Moreover, the slurry impacts and rebounds against the target teeth, and the rebounding slurry impacts the newly sprayed slurry. Therefore, it also has the effect of a "collision type air classifier mill" in which the slurry particles collide with each other. And the wall attachment effect of the fluid slurry generates a particle swirl entrained by steam. Therefore, it also has the effect of a "vortex mill". Compared with the prior art, the structure is simpler, the cost is lower and it is easier to promote, and the grinding speed is faster and the efficiency is better. At the same time, the fine powder suction pipe forms a negative pressure in the classification chamber, and the slurry ground by the grinding module enters the classification chamber through the rising channel after meeting the particle size requirements. Description of the drawings

[0020] Figure 1 It is a schematic structural diagram of a vortex target type air classifier mill device in an embodiment.

[0021] Figure 2 It is a cross-sectional view of the grinding module in an embodiment.

[0022] Figure 3 It is a schematic structural diagram of the slurry-steam mixer in an embodiment.

[0023] Figure 4 It is a schematic diagram of the use state in an embodiment

[0024] Reference numerals:

[0025] Grinding module 1, inner target lining 11, outer target lining 12, grinding channel 13, target teeth 14, spraying pipe 15;

[0026] Classification module 2, classification chamber 21, fine powder suction pipe 22, classifier 23, classification impeller 231, classification blade 232, classification motor 233;

[0027] Rising pipe 3, coarse powder falling pipe 4, support 5;

[0028] Slurry-steam mixer 6, feeding module 61, slurry inlet pipe body 611, slurry inlet channel 6111, second flange 6112, steam pipe body 612, steam channel 6121, introducing pipe section 6122, first flange 6123, third flange 6124;

[0029] Mixing chamber 62, fourth flange 621, fifth flange 622, first conical section 623, mixing section 624, second conical section 625;

[0030] Jet discharging channel 63, Laval nozzle 64;

[0031] Vortex guide sleeve 65, atomizing nozzle 66. Detailed implementation mode

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0033] A vortex target type airflow mill device of this embodiment, as Figures 1 to 2 shown, includes a grinding module 1 and a classification module 2. The grinding module 1 includes an inner target lining 11 and an outer target lining 12 arranged concentrically in a ring shape. An annular grinding channel 13 is formed between the inner target lining 11 and the outer target lining 12. Target teeth 14 are arranged on the opposite side surfaces of the inner target lining 11 and the outer target lining 12. The outer target lining 12 is connected with a plurality of slurry spraying pipes 15. The plurality of slurry spraying pipes 15 are circumferentially spaced apart around the grinding channel 13, and the slurry spraying pipes 15 are arranged obliquely in the radial direction relative to the grinding channel 13, that is, non-coincident arrangement. Specifically, the radial angle a between the central axis of the slurry spraying pipe 15 and the grinding channel 13 is 20° to 90°. Similarly, slurry spraying pipes 15 can be arranged on the inner target lining 11 in a similar manner in practice. The slurry spraying pipes 15 can adopt supersonic nozzles in the prior art. Further, the slurry spraying pipes 15 are connected with a slurry-steam mixer 6 for mixing raw materials with high-temperature steam.

[0034] During use, the solid arrows in the figure indicate the moving direction of the slurry. The slurry enters the grinding channel 13 at a high speed through the slurry spraying pipe 15 and impacts the target teeth 14 on the side walls of the inner target lining 11 and the outer target lining 12. Therefore, it has the function of a "target type air classifier mill" where the slurry impacts and breaks against the target teeth 14. Moreover, the slurry rebounds after impacting the target teeth 14, and the rebounding slurry impacts the newly sprayed slurry. Therefore, it also has the effect of a "collision type air classifier mill" where the slurry particles collide with each other. Additionally, the wall attachment effect of the fluid slurry generates a particle vortex with steam entrainment. Therefore, it also has the efficacy of a "vortex mill". Figure 2 The particles shown as C in the figure represent the particle vortex with steam entrainment generated by the wall attachment effect of the fluid, D represents the impact vortex flow particles, E represents the coarse particles continuing to move forward and being impacted by the newly sprayed particle flow, and F represents the coarse particles being centrifuged towards the middle by the rotational centrifugal force and then being impacted and crushed by the impact particles.

[0035] In this embodiment, the classification module 2 includes a classification chamber 21 located above the grinding module 1. The classification chamber 21 is connected to the grinding channel 13 through a rising pipe 3. The classification chamber 21 is connected with a fine powder suction pipe 22. A classifier 23 is provided in the classification chamber 21. The classifier 23 includes a classification impeller 231 rotatably installed in the middle of the classification chamber 21, classification blades 232 fixed outside the classification impeller 231, and a classification motor 233 fixed outside the classification chamber 21 and used to drive the classification impeller 231 to rotate. The fine powder suction pipe 22 is connected above the corresponding classification impeller 231 in the classification chamber 21. The fine powder suction pipe 22 forms a negative pressure in the classification chamber 21. The slurry ground by the grinding module 1, the particles meeting the requirements of fineness and coarseness enter the classification chamber 21 through the rising channel. The finer powder particles are sucked away by the fine powder suction pipe 22 in the B direction against the centrifugal force, while the coarser powder particles move in the A direction away from the classifier 23 due to the centrifugal force given by the classification blades 232.

[0036] Of course, in practice, the classifier 23 can also be omitted. In this way, the particles reaching a certain degree of grinding accuracy will be sucked away by the fine powder suction pipe 22 through the classification chamber 21, and then further classified by other classification equipment as needed.

[0037] In this embodiment, the classification chamber 21 is also connected with a coarse powder falling pipe 4. The coarse powder falling pipe 4 is connected to the slurry spraying pipe 15 and re-enters the grinding channel 13 for re-grinding. The upper ends of the rising pipe 3 and the coarse powder falling pipe 4 are connected to the bottom of the classification chamber 21, and the upper port of the rising pipe 3 is closer to the classifier 23 than the upper port of the powder falling pipe. Specifically, the rising pipe 3 and the coarse powder falling pipe 4 are arranged obliquely.

[0038] In this embodiment, the inner target lining 11 and the outer target lining 12 are in a U shape with a closed bottom and an open top, and the rising pipe 3 is an annular pipe. In practice, it can be changed to that the top of the grinding channel 13 is sealed by an annular plate, and the rising pipe 3 includes a plurality of pipe bodies arranged separately, one end of which is connected to the annular plate and the other end is connected to the grading chamber 21.

[0039] Specifically, the target teeth 14 are uniformly or non-uniformly arranged on the inner wall of the inner target lining 11 / outer target lining 12. Here, the uniformity and non-uniformity can be understood as the distribution method, that is, the target teeth 14 are evenly and continuously distributed around the corresponding target lining side wall, or non-uniformly and discontinuously distributed. It can also be understood as the dimensional relationship, that is, the tooth height and tooth width of the target teeth 14 are of equal size, or can be of unequal size. For example, the size of the target teeth 14 at the corresponding slurry spraying pipe 15 can be set larger to withstand high-pressure collision, while the target teeth 14 at other positions can be set smaller to allow the slurry to pass through faster.

[0040] In this embodiment, the grinding module 1 is provided with a support 5 to lift the grinding module 1.

[0041] In this embodiment, the slurry-steam mixer 6 is as Figures 3 to 4 shown, including a feeding module 61, a mixing chamber 62 and a jet discharging channel 63. The feeding module 61 includes a slurry feeding channel 6111 for inputting slurry and a steam channel 6121 for inputting high-temperature and high-pressure steam. The jet discharging channel 63, the slurry feeding channel 6111 and the steam channel 6121 are all communicated with the mixing chamber 62, and the jet discharging channel 63 is provided with a Laval nozzle 64. The slurry-steam mixer realizes heating by mixing slurry and steam, without the need to heat while flowing in a long pipeline as in the past. Therefore, the situation that the slurry adheres to the pipe wall after being heated is reduced, and only the mixing chamber needs to be cleaned, so the cleaning difficulty is greatly reduced.

[0042] It should be noted that the high-temperature and high-pressure steam does not limit the specific values of temperature and pressure, but relatively speaking, steam that meets the temperature and pressure requirements can be selected according to the requirements of the slurry.

[0043] In this embodiment, the feeding module 61 includes a slurry pipe body 611 and a steam pipe body 612. The slurry feeding channel 6111 is located in the slurry pipe body 611; the slurry pipe body 611 is arranged inside the steam pipe body 612, and the annular channel formed between the outer wall of the slurry pipe body 611 and the inner wall of the steam pipe body 612 serves as the steam channel 6121. Specifically, an introducing pipe section 6122 is integrally formed beside the steam pipe body 612, and the channel in the introducing pipe section 6122 is communicated with the steam channel 6121. Therefore, the steam flow track is L-shaped.

[0044] In this embodiment, a first flange 6123 is provided on the outer side of the steam pipe body 612, and a second flange 6112 is provided on the outer side of the slurry inlet pipe body 611. The first flange 6123 and the second flange 6112 are fixed to each other via a bolt assembly. The steam pipe body 612 is further provided with a third flange 6124, and the mixing chamber 62 is provided with a fourth flange 621. The third flange 6124 and the fourth flange 621 are fixed to each other via a bolt assembly to form an integral body. A fifth flange 622 is further provided on the outer side of the mixing chamber 62 for fixing the mixing chamber 62 to the using equipment.

[0045] In this embodiment, the mixing chamber 62 is in a cylindrical shape. One end of it is communicated with the slurry inlet pipe body 611 and the steam pipe body 612, and the other end is connected to the Laval nozzle 64. The mixing chamber 62 includes a first tapered section 623 with a gradually increasing inner diameter, a mixing section 624 with an equal diameter, and a second tapered section 625 with a gradually decreasing inner diameter in sequence.

[0046] In this embodiment, a swirl guide sleeve 65 is provided at the discharge end of the slurry inlet passage 6111 for guiding the slurry to rotate and output. An atomizing nozzle 66 is provided at the end of the steam pipe body 612. The atomizing nozzle 66 is simultaneously communicated with the discharge ports of the slurry inlet pipe body 611 and the steam pipe body 612. During use, high-temperature and high-pressure steam is ejected in a rotating manner to mix with the pulp. After the steam and the pulp are preliminarily mixed, they are atomized and ejected via the atomizing nozzle 66, and are fully mixed in the mixing chamber 62. The high-temperature and high-pressure steam provides power, and a rotating air flow is generated under the action of the rotating guide sleeve, and they are mixed to form a steam particle flow, and then enter the Laval nozzle 64 to be accelerated and ejected into the grinding passage 13.

[0047] In the description of the present invention, obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Usually, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0048] Therefore, the above detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but only represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0049] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "middle", "upper", "lower", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0050] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "set", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A vortex target type air flow mill device, characterized in that: The invention comprises a grinding module (1) and a grading module (2), wherein the grinding module (1) comprises an annular inner target liner (11) and an outer target liner (12), an annular grinding channel (13) is formed between the inner target liner (11) and the outer target liner (12), and target teeth (14) are arranged on the facing sides of the inner target liner (11) and the outer target liner (12); the inner target liner (11) and / or the outer target liner (12) are connected to a plurality of spraying pipes (15), and the plurality of spraying pipes (15) are distributed at intervals around the grinding channel (13) in the circumferential direction; and the spraying pipes (15) are arranged to be inclined relative to the radial direction of the grinding channel (13); The classification module (2) comprises a classification chamber (21) located above the grinding module (1); the classification chamber (21) is connected to the grinding channel (13) via an ascending pipe (3); and the classification chamber (21) is connected to a fine powder suction pipe (22).

2. A vortex target type airflow mill device according to claim 1, characterized in that: The classifying chamber (21) is provided with a classifier (23), the classifier (23) comprising a classifying impeller (231) rotatably mounted in the middle of the classifying chamber (21), a classifying blade (232) fixed to the outside of the classifying impeller (231), and a classifying motor (233) fixed to the outside of the classifying chamber (21) and used to drive the classifying impeller (231) to rotate, and a fine powder suction pipe (22) is connected to the upper side of the corresponding classifying impeller (231) of the classifying chamber (21).

3. A vortex target type airflow mill device according to claim 2, characterized in that: The classification chamber (21) is also connected to a coarse powder falling pipe (4), and the coarse powder falling pipe (4) is communicated with the spraying pipe (15).

4. The vortex target type airflow mill device according to claim 3 is characterized in that: The upper ends of the ascending pipe (3) and the coarse powder falling pipe (4) are connected to the bottom of the classification chamber (21), and the upper end of the ascending pipe (3) is closer to the classifier (23) than the upper end of the powder falling pipe.

5. A vortex target type airflow mill device according to claim 4, characterized in that: The ascending pipe (3) and the coarse powder falling pipe (4) are arranged obliquely.

6. The vortex target type air flow mill device according to claim 1, characterized in that: The inner target liner (11) and the outer target liner (12) are in a U shape with a closed bottom and an open top, and the ascending pipe (3) is an annular pipe; or the top right annular plate of the grinding channel (13) is sealed, and the ascending pipe (3) includes a plurality of separately arranged pipe bodies, one end of which is connected to the annular plate, and the other end is connected to the classification chamber (21).

7. The vortex target type airflow mill device according to claim 1 is characterized in that: The target teeth (14) are evenly arranged on the inner wall of the inner target liner (11) / the outer target liner (12), or unevenly arranged.

8. The vortex target type airflow mill device according to claim 1, characterized in that: The grinding module (1) is provided with a support (5) so as to stand up the grinding module (1).

9. The vortex target type airflow mill device according to claim 1, characterized in that: The spraying pipe (15) is a supersonic spraying pipe.

10. A vortex target type airflow mill device according to claim 9, characterized in that: The spraying pipe (15) is connected to a slurry steam mixer (6) for mixing the raw materials with high-temperature steam; The slurry-steam mixer (6) comprises a feed module (61), a mixing chamber (62) and a jet discharge channel (63); the feed module (61) comprises a slurry feed channel (6111) for inputting slurry and a steam channel (6121) for inputting high-temperature and high-pressure steam; the jet discharge channel (63), the slurry feed channel (6111) and the steam channel (6121) are all connected to the mixing chamber (62); the jet discharge channel (63) is provided with a Laval nozzle (64); the feed module (61) comprises a slurry feed pipe body (611) and a steam pipe body (612); the slurry feed channel (6111) and the steam channel (6121) are all connected to the mixing chamber (62); the jet discharge channel (63) is provided with a Laval nozzle (64); 6111) is located in the slurry inlet pipe body (611); the slurry inlet pipe body (611) is inserted into the steam pipe body (612), and the annular channel enclosed by the outer wall of the slurry inlet pipe body (611) and the inner wall of the steam pipe body (612) serves as the steam channel (6121); a swirl guide sleeve (65) is provided at the discharge end of the slurry inlet channel (6111) for rotating and guiding the slurry for output; an atomizing nozzle (66) is provided at the end of the steam pipe body (612), and the atomizing nozzle (66) is connected to the discharge ports of the slurry inlet pipe body (611) and the steam pipe body (612) at the same time.

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