Slurry-steam mixer convenient to clean and jet mill with slurry-steam mixer

Abstract

The utility model relates to the technical field of material grinding equipment, in particular to a slurry and steam mixer convenient to clean and an airflow mill with the slurry and steam mixer convenient to clean, which comprises a feeding module, a mixing chamber and a jet discharging channel, and the feeding module comprises a slurry inlet channel used for inputting slurry and a steam channel used for inputting high-temperature and high-pressure steam. The jet discharging channel, the pulp inlet channel and the steam channel are all communicated with the mixing chamber, and the jet discharging channel is provided with a Laval nozzle. According to the slurry-steam mixer, heating is achieved through mixing of slurry and steam, the situation that the slurry flows and is heated in a long pipeline in the past is avoided, the situation that the slurry adheres to the pipe wall after being heated is reduced, only the mixing chamber needs to be cleaned, and therefore the cleaning difficulty is greatly reduced. Compared with the prior art, the jet mill applying the slurry-steam mixer is simpler in structure, lower in cost, easier to popularize, higher in grinding speed and better in effect.

Description

Technical Field

[0001] The utility model relates to the technical field of material grinding equipment, and particularly relates to a pulp-steam mixer which is convenient to clean and an air classifier mill with the same. Background Art

[0002] The sand mill is currently the grinding equipment with the widest material adaptability, the most advanced technology and the highest efficiency. 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 of the stirring rod is small, and the grinding energy is relatively intensive. 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 inventor 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 the grinding technologies created by the inventor of the present application.

[0004] Particularly, in the above-mentioned target-type circulating multi-stage air classifier mill device, the outer heater is connected through a high-pressure pulp-steam pipe, the slurry is transported in the pipeline, and the slurry is heated by heat transfer through the heating pipe wall. After the heated slurry is ejected by the Laval nozzle. It is found in practice that when the slurry is heated in the pulper and transported through the pipeline, the ore pulp is easy to adsorb and adhere to the inner wall of the pipeline, and it needs to be cleaned irregularly and is difficult to clean. Summary of the Invention

[0005] Aiming at the above technical problems existing in the prior art, the utility model provides a pulp-steam mixer which is convenient to clean and an air classifier mill with the same.

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

[0007] Provided is a pulp-steam mixer that is convenient for cleaning, including a feeding module, a mixing chamber, and a jet discharging channel. The feeding module includes a pulp feeding channel for inputting pulp and a steam channel for inputting high-temperature and high-pressure steam. The jet discharging channel, the pulp feeding channel, and the steam channel are all communicated with the mixing chamber, and a Laval nozzle is provided in the jet discharging channel.

[0008] As a further optional solution, the feeding module includes a pulp feeding pipe body and a steam pipe body. The pulp feeding channel is located in the pulp feeding pipe body. The pulp feeding pipe body is arranged inside the steam pipe body, and an annular channel formed between the outer wall of the pulp feeding pipe body and the inner wall of the steam pipe body serves as the steam channel.

[0009] As a further optional solution, an introducing pipe section is integrally formed on the side of the steam pipe body, and the channel inside the introducing pipe section is communicated with the steam channel.

[0010] As a further optional solution, a first flange is provided on the outer side of the steam pipe body, and a second flange is provided on the outer side of the pulp feeding pipe body. The first flange and the second flange are fixed to each other via a bolt assembly.

[0011] As a further optional solution, the steam pipe body is further provided with a third flange, and the mixing chamber is provided with a fourth flange. The third flange and the fourth flange are fixed to each other via a bolt assembly.

[0012] As a further optional solution, the mixing chamber is in a cylindrical shape, one end of which is communicated with the pulp feeding pipe body and the steam pipe body, and the other end is connected to the Laval nozzle.

[0013] As a further optional solution, the mixing chamber includes a first tapered section with a gradually increasing inner diameter, a mixing section with an equal diameter, and a second tapered section with a gradually decreasing inner diameter in sequence.

[0014] As a further optional solution, a swirling guide sleeve is provided at the discharging end of the pulp feeding channel for swirling and guiding the output of the pulp.

[0015] As a further optional solution, an atomizing nozzle is provided at the end of the steam pipe body, and the atomizing nozzle is simultaneously communicated with the discharging ports of the pulp feeding pipe body and the steam pipe body.

[0016] An air classifier mill, characterized in that: it 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 opposite side surfaces of the inner target lining and the outer target lining. Multiple slurry sprayers are connected to the inner target lining and / or the outer target lining. The multiple slurry sprayers are circumferentially spaced apart around the grinding channel. The slurry sprayers are arranged radially inclined relative to the grinding channel. The slurry sprayer is one of the above-mentioned pulp-steam mixers that is convenient for cleaning, and the jet discharging channel is communicated with the grinding channel.

[0017] The beneficial effects of the present utility model:

[0018] A slurry-steam mixer that is convenient for cleaning and an air classifier mill having the same. The slurry-steam mixer realizes heating by mixing slurry and steam, eliminating the need for heating while flowing in a long pipeline as in the past. Therefore, the situation where the slurry adheres to the pipe wall after heating is reduced, and only the mixing chamber needs to be cleaned, thus greatly reducing the cleaning difficulty.

[0019] When the air classifier mill is in use, the slurry enters the grinding channel at high speed through a Laval nozzle and impacts the target teeth on the side walls of the inner target lining and the outer target lining. Therefore, it has the function of a "target type air classifier mill" where the slurry impacts and breaks the target teeth; moreover, the slurry rebounds after impacting the target teeth, and the rebounding slurry impacts the newly sprayed slurry. Therefore, there is also the effect of a "collision type air classifier mill" where the slurry particles collide with each other; and due to the wall attachment effect of the fluid slurry, a particle swirl entrained by steam is generated. Therefore, there is also 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. Brief Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a slurry-steam mixer that is convenient for cleaning in an embodiment.

[0021] Figure 2 It is a schematic diagram of the usage state of a slurry-steam mixer that is convenient for cleaning in an embodiment.

[0022] Figure 3 It is a schematic structural diagram of the air classifier mill in an embodiment.

[0023] Reference Numerals:

[0024] Feeding module 1, slurry inlet pipe body 11, slurry inlet channel 111, second flange 112, steam pipe body 12, steam channel 121, introducing pipe section 122, first flange 123, third flange 124;

[0025] Mixing chamber 2, fourth flange 21, fifth flange 22, first tapered section 23, mixing section 24, second tapered section 25;

[0026] Jet discharge channel 3, Laval nozzle 4;

[0027] Vortex guide sleeve 5, atomizing nozzle 6;

[0028] Inner target lining 7, outer target lining 8, grinding channel 9, target teeth 10. Detailed Embodiment

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the 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.

[0030] An easily cleanable slurry-steam mixer according to this embodiment, as Figures 1 to 2 shown, includes a feeding module 1, a mixing chamber 2, and a jet discharging channel 3. The feeding module 1 includes a slurry feeding channel 111 for inputting slurry and a steam channel 121 for inputting high-temperature and high-pressure steam. The jet discharging channel 3, the slurry feeding channel 111, and the steam channel 121 are all communicated with the mixing chamber 2, and a Laval nozzle 4 is arranged in the jet discharging channel 3.

[0031] 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, the steam that meets the temperature and pressure requirements can be selected according to the requirements of the slurry.

[0032] In this embodiment, the feeding module 1 includes a slurry feeding pipe body 11 and a steam pipe body 12. The slurry feeding channel 111 is located in the slurry feeding pipe body 11. The slurry feeding pipe body 11 is arranged inside the steam pipe body 12, and the annular channel formed between the outer wall of the slurry feeding pipe body 11 and the inner wall of the steam pipe body 12 serves as the steam channel 121. Specifically, an introducing pipe section 122 is integrally formed beside the steam pipe body 12, and the channel inside the introducing pipe section 122 is communicated with the steam channel 121. Therefore, the steam flow trajectory is L-shaped.

[0033] In this embodiment, a first flange 123 is arranged on the outer side of the steam pipe body 12, and a second flange 112 is arranged on the outer side of the slurry feeding pipe body 11. The first flange 123 and the second flange 112 are fixed by a bolt assembly. The steam pipe body 12 is also provided with a third flange 124, and the mixing chamber 2 is provided with a fourth flange 21. The third flange 124 and the fourth flange 21 are fixed by a bolt assembly to form a whole. A fifth flange 22 is also arranged on the outer side of the mixing chamber 2 for fixing the mixing chamber 2 to the peripheral using equipment.

[0034] In this embodiment, the mixing chamber 2 is in a cylindrical shape. One end of it is communicated with the slurry feeding pipe body 11 and the steam pipe body 12, and the other end is connected to the Laval nozzle 4. The mixing chamber 2 includes a first tapered section 23 with a gradually increasing inner diameter, a mixing section 24 with an equal diameter, and a second tapered section 25 with a gradually decreasing inner diameter in sequence.

[0035] In this embodiment, a swirling guide sleeve 5 is arranged at the discharging end of the slurry feeding channel 111 for swirling and guiding the output of the slurry. An atomizing nozzle 6 is arranged at the end of the steam pipe body 12. The atomizing nozzle 6 is simultaneously communicated with the discharging ports of the slurry feeding pipe body 11 and the steam pipe body 12. During use, the high-temperature and high-pressure steam is sprayed out rotationally to mix with the ore pulp. After the steam and the ore pulp are preliminarily mixed, they are atomized and sprayed out through the atomizing nozzle 6, fully mixed in the mixing chamber 2. The high-temperature and high-pressure steam provides power, and a swirling air flow is generated under the action of the swirling guide sleeve, and the mixture forms a steam particle flow, and then enters the Laval nozzle 4 and is accelerated and sprayed out.

[0036] Combined with Figure 3As shown in the figure, the present embodiment further provides an air classifier, which includes an annular inner target lining 7 and an outer target lining 8. An annular grinding channel 9 is formed between the inner target lining 7 and the outer target lining 8. Target teeth 10 are provided on the opposite sides of the inner target lining 7 and the outer target lining 8. The outer target lining 8 is connected with a plurality of slurry sprayers, and the plurality of slurry sprayers are circumferentially spaced apart around the grinding channel 9. The slurry sprayers are arranged radially inclined relative to the grinding channel 9. The slurry sprayers adopt the above-mentioned slurry-steam mixer that is convenient for cleaning. The jet discharge channel 3 communicates with the grinding channel 9 so that the steam particle flow is sprayed into the grinding channel 9 obliquely.

[0037] In the description of the present invention, it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. The components of the embodiments of the present invention described and shown in the drawings here usually can be arranged and designed in various different configurations.

[0038] 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.

[0039] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "in", "on", "under", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the invention product is usually placed. It is only for the convenience of describing the present invention 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, so it cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "connected" 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 invention can be understood according to specific situations.

Claims

1. A pulp-steam mixer that is convenient for cleaning, characterized in that: It includes a feeding module (1), a mixing chamber (2) and a jet discharging channel (3). The feeding module (1) includes a slurry inlet channel (111) for inputting slurry and a steam channel (121) for inputting high-temperature and high-pressure steam. The jet discharging channel (3), the slurry inlet channel (111) and the steam channel (121) are all communicated with the mixing chamber (2), and a Laval nozzle (4) is arranged in the jet discharging channel (3).

2. The steam-pulp mixer that is easy to clean according to claim 1, wherein: The feeding module (1) includes a slurry inlet pipe body (11) and a steam pipe body (12). The slurry inlet channel (111) is located in the slurry inlet pipe body (11); the slurry inlet pipe body (11) is arranged inside the steam pipe body (12), and an annular channel formed between the outer wall of the slurry inlet pipe body (11) and the inner wall of the steam pipe body (12) serves as the steam channel (121).

3. The steam-pulp mixer according to claim 2, wherein: An introducing pipe section (122) is integrally formed on the side of the steam pipe body (12), and the channel inside the introducing pipe section (122) is communicated with the steam channel (121).

4. The steam-pulp mixer according to claim 2, wherein: A first flange (123) is arranged on the outer side of the steam pipe body (12), and a second flange (112) is arranged on the outer side of the slurry inlet pipe body (11). The first flange (123) and the second flange (112) are fixed via a bolt assembly.

5. The steam-pulp mixer according to claim 2, characterized in that: The steam pipe body (12) is further provided with a third flange (124), and the mixing chamber (2) is provided with a fourth flange (21). The third flange (124) and the fourth flange (21) are fixed via a bolt assembly.

6. The steam-pulp mixer according to claim 2, characterized in that: The mixing chamber (2) is in a cylindrical shape. One end of it is communicated with the slurry inlet pipe body (11) and the steam pipe body (12), and the other end is connected to the Laval nozzle (4).

7. The steam-pulp mixer that is convenient for cleaning according to claim 6, wherein: The mixing chamber (2) includes a first tapered section (23) with gradually increasing inner diameter, a mixing section (24) with equal diameter, and a second tapered section (25) with gradually decreasing inner diameter in sequence.

8. The steam-pulp mixer according to claim 2, characterized in that: A swirl guiding sleeve (5) is arranged at the discharging end of the slurry inlet channel (111) for guiding the slurry to rotate and output.

9. The steam-pulp mixer that is easy to clean according to claim 2, wherein: An atomizing nozzle (6) is arranged at the end of the steam pipe body (12), and the atomizing nozzle (6) is simultaneously communicated with the discharging ports of the slurry inlet pipe body (11) and the steam pipe body (12).

10. Air jet mill, characterized in that: It includes an annular inner target lining (7) and an outer target lining (8). An annular grinding channel (9) is formed between the inner target lining (7) and the outer target lining (8). Target teeth (10) are arranged on the opposite side surfaces of the inner target lining (7) and the outer target lining (8); multiple slurry sprayers are connected to the inner target lining (7) and / or the outer target lining (8), and the multiple slurry sprayers are circumferentially spaced apart around the grinding channel (9); the slurry sprayers are arranged radially inclined relative to the grinding channel (9), and the slurry sprayer is a slurry-steam mixer for easy cleaning according to any one of claims 1 to 9, and the jet discharging channel (3) is communicated with the grinding channel (9).

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