CN217663776U - Fluidized bed air breaking and demagnetizing device - Google Patents

Abstract

The utility model provides a fluidized bed gas crushing and magnetic removing device, which belongs to the technical field of lithium ion battery material manufacturing and comprises a feeding system, a grinding cavity, a nozzle, a grading rotor, a magnetic removing screen and a material receiving system; the feeding system is arranged at the bottom of the grinding cavity; the nozzles are arranged at the bottom of the grinding cavity and are positioned around the feeding system; the grading rotor is arranged at the top of the grinding cavity; the top of the material receiving system is communicated with the top of the grinding cavity through a pipeline; the degaussing screen is arranged in the pipeline. The utility model has the advantages that the multi-layer demagnetizing screen is arranged in the pipeline, the area of the arranged screen is small, a large amount of space is saved, the number of layers of more demagnetizing screens is increased at lower cost, and better demagnetizing effect can be achieved; in addition, a large amount of compressed air or protective gas (such as nitrogen) is sprayed out of the nozzle to crush the materials, so that the contact between the materials and metal objects is avoided to the greatest extent, and the hidden danger of introducing magnetic substances is reduced.

Description

Fluidized bed air breaking and demagnetizing device

Technical Field

The utility model belongs to the technical field of lithium ion battery material makes, especially, relate to a fluidized bed air break demagnetizer.

Background

The lithium ion battery anode material is used as an important component of a lithium battery, the performance of the battery is greatly influenced, and if the content of magnetic substances in the anode material exceeds the standard, the battery self-discharge can be caused, so that the potential safety hazard of the lithium battery is obviously increased. Therefore, the demagnetization process is a relatively important process in the production and manufacture of the positive electrode material. The lithium ion battery anode material is agglomerated in a firing process, so that agglomeration is generated, the material needs to be crushed, and the particle size of the material is reduced to a required size. Generally, a magnetism removing process is arranged after the crushing process and before the material is received, but corresponding equipment needs to be additionally arranged, so that the equipment cost, the site space and the time needed by the treatment process are increased.

CN211755417U discloses a lithium ion battery cathode material demagnetizer, which comprises a housin, cut apart into through the support in the casing and smash the room and remove the magnetism room, casing upper end one side is equipped with the inlet tube, inlet tube one side is provided with the feed inlet, the feed inlet is linked together with smashing the room, the support is provided with two, be located the shells inner wall both sides respectively, it has seted up the discharge gate to remove the magnetism room bottom, be equipped with the finished product bin under the discharge gate, one side below that the inlet tube was kept away from to the casing is equipped with the supporting seat, and be equipped with the substandard product bin on the supporting seat, it gets into the material through the feed inlet to smash the back through driving gear and driven gear through the crushing room that sets up, will smash qualified material filtration through first filter and second filter and detach, then remove magnetism in removing the magnetism intraductal for the first time, the material that has magnetism in the in-process of unloading removes two inner walls on the left and right sides of magnetism pipe and contacts, thereby remove magnetism to the material for the first time.

However, the crushing and demagnetizing device in the above-mentioned comparison document belongs to the first demagnetization, and cannot achieve the final demagnetization effect, and crushing uses the driving gear and the driven gear to grind and crush, increasing the hidden danger of bringing magnetic substances into the material.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a fluidized bed gas breaking and demagnetizing device to alleviate the above technical problems.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a fluidized bed gas breaking and demagnetizing device comprises a feeding system, a grinding cavity, a nozzle, a grading rotor, a demagnetizing screen and a material receiving system; the feeding system is arranged at the bottom of the grinding cavity; the nozzles are arranged at the bottom of the grinding cavity and are positioned around the feeding system; the grading rotor is arranged at the top of the grinding cavity; the top of the material receiving system is communicated with the top of the grinding cavity through a pipeline; the magnetism removing screen is arranged inside the pipeline.

Further, still include cyclone, and it locates the top of receiving the material system.

Further, still include the filter, the filter is located receive the middle part of material system.

Furthermore, the bottom of the material receiving system is provided with a material receiving cavity.

Further, the number of the nozzles is four.

Further, the feeding system is a screw feeder.

Further, the classifying rotor is a turbine classifier.

Further, the pipeline is an exhaust pipe.

Further, still include the draught fan, the draught fan is located receive the inside of material system.

Compared with the prior art, the utility model provides a pair of fluidized bed air break demagnetizer has following advantage:

1. the utility model discloses a set up the multilayer in the pipeline and remove the magnetism screen cloth, the screen area of setting is little, practices thrift a large amount of spaces to lower cost-push removes the number of piles of magnetism screen cloth more, can reach better except that the magnetism effect.

2. The utility model discloses a spout a large amount of compressed air or protective gas (like nitrogen gas) in the nozzle, smash the material, the most probable contact of having avoided material and metal article has reduced the hidden danger of introducing magnetic substance.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic view of the overall structure of the fluidized bed gas breaking and demagnetizing device of the present invention.

Description of the reference numerals:

1-a feed system; 2-grinding the cavity; 3-a nozzle; 4-a classifying rotor; 5-a demagnetizing screen; 6-a material receiving system; 7-a pipeline; 8-a cyclone separation device; 9-a filter; and 10-a draught fan.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

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

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1, the utility model provides a fluidized bed gas crushing and magnetic removing device, which comprises a feeding system 1, a grinding cavity 2, a nozzle 3, a grading rotor 4, a magnetic removing screen 5 and a material receiving system 6; the feeding system 1 is arranged at the bottom of the grinding cavity 2; the nozzles 3 are arranged at the bottom of the grinding cavity 2 and are positioned around the feeding system 1; the grading rotor 4 is arranged at the top of the grinding cavity 2; the top of the material receiving system 6 is communicated with the top of the grinding cavity 2 through a pipeline 7; the demagnetizing screen 5 is arranged inside the pipeline 7.

More preferably, a cyclone separation device 8 is further included and is arranged at the top of the material receiving system 6.

More preferably, the collecting system further comprises a filter 9, and the filter 9 is arranged in the middle of the collecting system 6.

More preferably, the bottom of the material receiving system 6 is provided with a material receiving cavity.

More preferably, the number of nozzles 3 is four.

More preferably, the feeding system 1 is a screw feeder.

More preferably, the classifying rotor 4 is a turbo classifier.

More preferably, the pipeline 7 is an exhaust pipe.

More preferably, still include draught fan 10, draught fan 10 locates receive the inside of material system 6.

In the practical use process, materials in a bin enter a grinding cavity 2 through a spiral feeder, four pairs of opposite jet flows entering the grinding cavity 2 from a nozzle 3 fluidize a material bed layer entering the grinding cavity 2 to form four strands of high-speed gas-solid two-phase fluids, the four strands of high-speed gas-solid two-phase fluids are converged near the central point of the grinding cavity 2 to generate violent impact collision and friction for crushing, then a jet-shaped upward-moving multi-phase fluid column is formed above a butting center, crushed particles are sent to a grading rotor 4 positioned at the upper part, fine particles enter a demagnetizing system from an outlet, and enter a cyclone separator and a filter 9 for trapping after being demagnetized by a plurality of layers of demagnetizing screens 5; the coarse fraction is returned to the material bed under the action of gravity and is crushed again.

The specific process comprises the following steps: the compressed air forms a centripetal reverse jet flow field at the lower part of the crushing chamber through a supersonic jet flow generated by the rapid expansion and acceleration of the crushing nozzle 3, the material at the bottom of the crushing chamber is fluidized under the action of pressure difference, the accelerated materials are converged at the intersection point of the multiple nozzles 3, and severe impact, collision and friction are generated for crushing; the crushed materials move to a certain height of the upper part of the crushing chamber along with the rising air flow, the coarse particles fall back to the lower part of the grinding chamber along the wall surface of the grinding chamber under the action of gravity, and the fine powder moves to the turbine classifier at the upper part along with the air flow; in a flow field generated by a high-speed turbine, coarse particles are thrown to the vicinity of the cylinder wall under the action of centrifugal force, and fall back to the lower part of the grinding chamber along with stalled coarse powder for grinding; the micro powder meeting the fineness requirement is conveyed to a cyclone separator through a grading sheet flow channel and an exhaust pipe to be collected as a product, a small amount of micro powder is subjected to further gas-solid separation by a bag type trap, and purified air is discharged out of the machine by an induced draft fan 10.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The utility model provides a fluidized bed air-broken demagnetizer which characterized in that: comprises a feeding system, a grinding cavity, a nozzle, a grading rotor, a demagnetizing screen and a material receiving system;

the feeding system is arranged at the bottom of the grinding cavity;

the nozzles are arranged at the bottom of the grinding cavity and are positioned around the feeding system;

the grading rotor is arranged at the top of the grinding cavity;

the top of the material receiving system is communicated with the top of the grinding cavity through a pipeline;

the magnetism removing screen is arranged inside the pipeline.

2. The fluidized bed gas breaking and demagnetizing device according to claim 1, wherein: the material receiving system is characterized by further comprising a cyclone separation device which is arranged at the top of the material receiving system.

3. The fluidized bed gas breaking and demagnetizing device according to claim 2, wherein: the material receiving system is characterized by further comprising a filter, wherein the filter is arranged in the middle of the material receiving system.

4. The fluidized bed gas breaking and demagnetizing device according to claim 3, wherein: and the bottom of the material receiving system is provided with a material receiving cavity.

5. The fluidized bed gas breaking and demagnetizing device according to claim 4, wherein: the number of the nozzles is four.

6. The fluidized bed gas breaking and demagnetizing device according to claim 5, wherein: the feeding system is a spiral feeder.

7. The fluidized bed gas breaking and demagnetizing device according to claim 6, wherein: the classifying rotor is a turbine classifier.

8. The fluidized bed gas breaking and demagnetizing device according to claim 7, wherein: the pipeline is an exhaust pipe.

9. The fluidized bed gas breaking and demagnetizing device according to claim 8, wherein: still include the draught fan, the draught fan is located receive the inside of material system.

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