CN220276916U - Silica material preparation facilities - Google Patents

Silica material preparation facilities Download PDF

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Publication number
CN220276916U
CN220276916U CN202321468008.1U CN202321468008U CN220276916U CN 220276916 U CN220276916 U CN 220276916U CN 202321468008 U CN202321468008 U CN 202321468008U CN 220276916 U CN220276916 U CN 220276916U
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unit
reaction
chamber
thermostatic chamber
material according
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CN202321468008.1U
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王明珊
宋冯乐
钟凯
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Sichuan Tiannuo Juneng New Energy Development Co ltd
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Sichuan Tiannuo Juneng New Energy Development Co ltd
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Abstract

The utility model provides a preparation device of a silica material, which comprises the following components: the device comprises a feeding unit, a transmission unit, a reaction unit, a storage unit, a collection unit and a vacuum unit which are sequentially connected according to the advancing direction of materials; the conveying unit can feed materials in a spiral propelling mode; the reaction unit comprises a heat-insulating shell, a reaction furnace and an induction heating mechanism, wherein the reaction furnace and the induction heating mechanism are arranged in the heat-insulating shell, the reaction furnace comprises a reaction chamber and a thermostatic chamber which are communicated, the reaction chamber is connected with the transmission unit, and the induction heating mechanism comprises a first induction coil and a second induction coil which are respectively arranged around the reaction chamber and the thermostatic chamber; the collecting unit is positioned at the tail part of the thermostatic chamber and collects the product; the storage unit is capable of storing the collected product; the vacuum unit is connected with the reaction unit and provides a vacuum environment. The utility model adopts induction heating to improve the electric heating conversion efficiency and the cooling rate, avoids the short circuit or open circuit of a heating component, eliminates the false deposition of disproportionated steam, reduces the pre-crushing process in the treatment of silica materials, and can realize continuous production.

Description

Silica material preparation facilities
Technical Field
The utility model relates to the field of material preparation devices, in particular to a silicon oxygen material preparation device.
Background
With the increasing popularization of new energy automobiles and large-scale energy storage and the accelerated development of the high-energy lithium ion battery market, the energy field is more obvious in the need of finding a substitute anode material with higher specific capacity. Silicon-based material with high theoretical specific capacity (4200 mAh g) -1 ) Suitable operating potential (-0.4V vs. Li/Li) + ) And abundant natural reserves, etc., become one of the most attractive alternative cathodes. However, practical use of the silicon anode is limited due to its huge volume expansion rate (-400%) and repeated accumulation of the SEI film, resulting in difficulty in mechanical pulverization, structural degradation and extremely rapid capacity fade. At the same time, silicon oxide (SiO) has a high theoretical specific capacity (2600 mAh g -1 ) Small volume expansion (150%) and Li generated in situ during initial lithiation 2 O and lithium silicate, the volume change in the process of intercalation/deintercalation is relieved, so that the cycle life is prolonged, and the lithium silicate becomes a more competitive anode material.
To date, most commercial lithium ion batteries employ intercalation-based negative electrode materials, such as graphite negative electrodes and the like. The main preparation method of the commercial silicon-oxygen material comprises the steps of mixing simple substance silicon and silicon dioxide according to a certain molar ratio, heating to more than 1500K for disproportionation under a negative pressure environment, and depositing and growing into a block body at a place with lower temperature and pressure; since the vickers hardness of the silica material is much higher than that of conventional metals, the silica material needs to be subjected to pre-crushing treatment when being subjected to jet milling, and various impurities are inevitably introduced into the treatment.
The inventor finds that the device involved in the traditional silica material preparation process not only has the problem that the product is difficult to break or the impurity is introduced by pre-breaking; meanwhile, in the long-time use of a heating component (molybdenum belt and molybdenum wire) of the traditional device, short circuit or open circuit can be caused by oxidization, vibration and material deposition, so that the production progress is greatly influenced; in addition, as the preparation process of the silicon-oxygen material is vacuum sintering, the traditional heat conduction mode of the heating wire-vacuum-reaction area can lead a plurality of heat to be taken away by the cooling system in the vacuum conduction process, thereby greatly reducing the electric heat conversion efficiency and causing serious waste of electric energy and time.
Disclosure of Invention
The present utility model aims to address at least one of the above-mentioned deficiencies of the prior art. For example, one of the purposes of the present utility model is to solve the problems of low electrothermal conversion efficiency and low temperature rise rate; it is another object of the present utility model to avoid precipitation of the product and to minimize the product particle size to meet continuous production requirements.
In order to achieve the above object, the present utility model provides a continuous silica material preparation apparatus for medium-high frequency heating:
comprises a feeding unit, a transmission unit, a reaction unit, a storage unit, a collection unit and a vacuum unit which are sequentially connected according to the advancing direction of materials;
wherein the feed unit is capable of storing raw materials; the transmission unit can feed materials in a spiral propulsion mode; the reaction unit comprises a heat-insulating shell, a reaction furnace and an induction heating mechanism, wherein the reaction furnace and the induction heating mechanism are arranged in the heat-insulating shell, the reaction furnace comprises a reaction chamber and a thermostatic chamber which are communicated, the reaction chamber is connected with the transmission unit, the induction heating mechanism comprises a first induction coil and a second induction coil which are respectively arranged around the reaction chamber and the thermostatic chamber, and the second induction coil can keep the temperature in the thermostatic chamber at a set temperature or within a set temperature range; the collecting unit is positioned at the tail part of the thermostatic chamber and can collect products; the storage unit can store the product collected by the collection unit; the vacuum unit is connected with the reaction unit and can provide a vacuum environment.
Optionally, a heat insulation layer is embedded between the reaction chamber and the thermostatic chamber.
Optionally, the collecting unit comprises a deposition disc and a rotary scraper, wherein the deposition disc is positioned at one end of the thermostatic chamber, which is away from the reaction chamber; the rotating doctor blade is capable of stripping off the product deposited on the deposition disc.
Optionally, a notch is formed below one end of the thermostatic chamber, which is far away from the reaction chamber; the storage unit comprises a temporary storage chamber and a storage chamber which are connected, wherein the temporary storage chamber is lower than the thermostatic chamber and is connected with the notch through a pipeline, and the storage chamber can collect products from the temporary storage chamber.
Optionally, the temporary storage chamber is internally provided with a stirring mechanism, and the outside is communicated with a circulating cooling system.
Optionally, the conveying unit comprises a spiral feeding shaft, one end of the spiral feeding shaft is connected with the feeding unit, and the other end of the spiral feeding shaft extends into the reaction chamber.
Optionally, the rotary feeding shaft is provided with a plurality of through holes on a shaft body in the reaction chamber.
Optionally, the number of the through holes is multiple and the through holes are uniformly formed.
Optionally, the apparatus further comprises an electronic control system.
Optionally, the apparatus further comprises a base, and the feeding unit and the reaction unit are mounted on the base.
Compared with the prior art, the utility model has the beneficial effects that at least one of the following contents is included:
(1) The magnetic field directly acts on the reaction area and the constant temperature area, and the heating mode from inside to outside avoids the heat transfer of the traditional device only through the mode of thermal radiation, and solves the problems of slow temperature rise and low electric heat conversion rate caused by extremely poor vacuum heat conduction.
(2) The non-contact induction heating mode is adopted, so that the problem that a heating component is extremely easy to short or break when the traditional device is used for processing conductive material powder is solved; meanwhile, a circulating system in the copper pipe is sensed, so that the temperature stability and the cooling rate of the furnace body can be effectively improved.
(3) The feeding unit is preferably provided with a stirring function and an elongated feeding shaft, and the bottom of the feeding unit is provided with a row of holes, so that the stacking uniformity of the materials in the reaction unit is ensured.
(4) The existence of a thermostatic chamber is added between the reaction unit and the collecting unit, the false deposition of disproportionated steam is eliminated, and the consistency of deposition products of the collecting unit is ensured.
(5) The collecting unit is used for collecting the silicon oxide material during preliminary deposition, so that a pre-crushing process in silicon oxide material treatment is omitted; on the other hand, the device can realize continuous production.
(6) The vacuum unit adopts a multistage pump grading vacuum process, so that the pressure drop rate in the vacuum process is reduced, and the raw materials after mixing are ensured not to be pumped away due to the excessively high pressure drop rate.
(7) The circulating cooling system is arranged at each stage of dynamic sealing structure, so that the long-time continuous production life of the device is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate a further understanding of the utility model and, together with the description, serve to explain the principles of the utility model, the above and other objects and/or features of the utility model, should become apparent from the following description taken in conjunction with the accompanying drawings, in which:
fig. 1 shows a schematic configuration of embodiment 1 of the present utility model.
Reference numerals illustrate:
1. the device comprises a feeding unit, 2, a transmission unit, 3, a reaction furnace, 31, a reaction chamber, 32, a thermostatic chamber, 4, an induction heating mechanism, 41, a first induction coil, 42, a second induction coil, 5, a collecting unit, 51, a deposition disc, 52, a rotary scraper, 6, a storage unit, 61, a temporary storage chamber, 62, a storage chamber, 7, a thermal insulation shell, 8, a vacuum unit, 9, an electric control system, 10 and a reaction unit.
Detailed Description
Hereinafter, the present utility model will be described in detail with reference to examples and drawings, but the following examples are only for the purpose of aiding understanding of the technology of the present utility model, and are not to be construed as further limiting the scope of the present utility model.
Example 1
A silicone material preparation apparatus according to an embodiment of the present utility model is described below with reference to fig. 1.
The device comprises a feeding unit 1, a transmission unit 2, a reaction unit 10, a storage unit 6, a reaction furnace 3, a reaction chamber 31, a thermostatic chamber 32, an induction heating mechanism 4, a first induction coil 41, a second induction coil 42, a collecting unit 5, a temporary storage chamber 61, a storage chamber 62, a vacuum unit 8, an electric control system 9 and a thermal insulation shell 7.
Wherein the feeding unit 1 is positioned at the left side of the device, mixes materials and adopts a spiral feeding shaft to push and feed the materials through the transmission unit 2. The other end of the transmission unit 2, one end of which is connected with the feeding unit, extends into the reaction chamber 31, the transmission unit 2 comprises a sleeve and a screw feeding shaft positioned in the sleeve, and the material is conveyed in the sleeve outside the screw feeding shaft by the pushing of the screw feeding shaft.
The sleeve of the transmission unit 2 is provided with through holes on the bottom of the shaft body extending into the reaction chamber 31, and the number of the through holes is a plurality of and the through holes are uniformly arranged side by side. The presence of these holes ensures a uniform accumulation of material in the reaction zone. More preferred scheme can be in the feed unit sets up stirring structure because traditional feed unit adopts non-stirring or unreasonable stirring structure, when involving superfine powder raw materials, the raw materials can be because the angle of repose problem or the special nature of material itself, leads to the raw materials unable smooth entering or the raw materials stagnates in feed unit's feed inlet top, and part has added unreasonable stirring structure and also can lead to the raw materials to stagnate in stirring structure periphery.
The reaction unit 10 comprises a heat preservation shell 7, a reaction furnace 3 and an induction heating mechanism 4, wherein the reaction furnace 3 and the induction heating mechanism 4 are arranged in the heat preservation shell 7, the reaction furnace 3 comprises a reaction chamber 31 and a thermostatic chamber 32 which are communicated, the reaction chamber 31 is connected with the transmission unit 2, the induction heating mechanism 4 comprises a first induction coil 41 and a second induction coil 42 which are respectively arranged around the reaction chamber 31 and the thermostatic chamber 32, and the second induction coil 42 can enable the temperature in the thermostatic chamber 32 to be kept at a set temperature or a set temperature range.
The reaction chamber 31 is communicated with the thermostatic chamber 32 and is positioned in the reaction furnace 3 in the device, and the base materials of the reaction chamber 31 and the thermostatic chamber 32 are one or more of 310S stainless steel, 314S stainless steel, molybdenum metal, tungsten-lanthanum alloy and the like. Wherein the reaction chamber 31 is connected with the transfer unit 2; the reaction chamber 31 of the reaction furnace 3 and the outer layer of the thermostatic chamber 32 are provided with an induction heating mechanism 4, the induction heating mechanism 4 is a first induction coil 41 and a second induction coil 42 which respectively encircle the outer walls of the reaction chamber 31 and the thermostatic chamber 32, the induction coils are externally coated with a heat preservation shell 7, and the heat preservation shell 7 is made of heat preservation materials.
The induction coil is copper, and the reaction chamber 31 and the thermostatic chamber 32 are directly heated by a magnetic field, so that the material is heated more uniformly and stably in an inside-out heating mode; meanwhile, the waste of electric energy and time caused by extremely poor vacuum heat conduction is also solved. The temperature of the reaction chamber 31 is quickly increased in a high-frequency induction heating mode, the temperature is controlled more accurately and stably, and the energy is saved and the efficiency is improved.
In this embodiment, a heat-insulating graphite ring is provided between the reaction chamber 31 and the thermostatic chamber 32 which are communicated with each other, and the reaction chamber 31 and the thermostatic chamber 32 are thermally isolated. The introduction of the thermostatic chamber 32 can stably control the deposition of the disproportionation gas in the collecting unit 5, preventing the growth and deposition of the disproportionation vapor in the vicinity of the reaction chamber 31. The presence of the thermostatic chamber 32 prevents the steam after disproportionation from being subject to overheat deposition and uneven density.
The collection unit 5 is located in a low temperature and low pressure region on the side remote from the feed unit 1 and on the same side as the reservoir 62. The collecting unit 5 comprises a depositing disc 51 and a rotary scraper 52, wherein the depositing disc 51 is made of nickel-chromium stainless steel, the rotary scraper 52 is made of ceramic, and the silica material can be peeled off after being primarily deposited on the depositing disc 51, so that the granularity of the silica material product can be controlled to be small and uniform, the requirement of secondary crushing is met, and continuous production can be performed by adjusting the feeding rate.
The presence of the above-mentioned collection unit 5 not only solves the problem of difficulty in pulverizing the deposition product of the silica material, but also allows continuous production of the device.
The storage unit 6 includes a temporary storage chamber 61 and a storage chamber 62, wherein the temporary storage chamber 61 is located below the collecting unit 5 and is used for storing and cooling the materials collected at high temperature, and the materials collected by the collecting unit 5 are rapidly cooled in the temporary storage chamber 61 by the stirring and cooling system and then transported to the storage chamber 62.
The vacuum unit 8 and the electronic control system 9 are located at the bottom of the device. The vacuum unit 8 is one or more of a single stage pump, a double stage pump, or a Roots pump. Sealing structures are arranged at two ends of the reaction furnace 3, and the sealing structures adopt dynamic sealing structures; in the preferred scheme, the dynamic sealing structure adopts multistage dynamic sealing: one or more of packing dynamic seal, labyrinth dynamic seal and oil seal dynamic seal; in a more preferable scheme, the dynamic sealing structure adopts water cooling.
The vacuum unit 8 is connected with the reaction unit 10, and provides a vacuum environment for the reaction unit 10 when the device is in a working state.
The working process of the silica material preparation apparatus of this embodiment may include: after the one or more materials are mixed in the feeding unit 1, the materials are transported to the reaction chamber 31 by the screw feeding shaft of the transmission unit 2; after vacuumizing, starting high-frequency heating, controlling the temperature to be more than 1500K, performing disproportionation reaction, and starting a collecting unit 5 to continuously collect the preliminarily deposited silicon oxygen material into a temporary storage chamber 61; the temporary storage chamber 61 is started to stir and cool circularly, and is pushed into the storage chamber 62 after reaching room temperature. The reaction raw materials are continuously added to the feeding unit according to the reaction rate, so that the continuous production can be realized.
The foregoing embodiments illustrate and describe the basic principles, principal features, and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. A silicone material preparation apparatus, the apparatus comprising: a feeding unit, a transmission unit, a reaction unit, a storage unit, a collection unit and a vacuum unit which are sequentially connected according to the advancing direction of the materials,
the feeding unit can store raw materials;
the transmission unit can feed materials in a spiral propulsion mode;
the reaction unit comprises a heat-insulating shell, a reaction furnace and an induction heating mechanism, wherein the reaction furnace and the induction heating mechanism are arranged in the heat-insulating shell, the reaction furnace comprises a reaction chamber and a thermostatic chamber which are communicated, the reaction chamber is connected with the transmission unit, the induction heating mechanism comprises a first induction coil and a second induction coil which are respectively arranged around the reaction chamber and the thermostatic chamber, and the second induction coil can keep the temperature in the thermostatic chamber at a set temperature or within a set temperature range;
the collecting unit is positioned at the tail part of the thermostatic chamber and can collect products;
the storage unit can store the product collected by the collection unit;
the vacuum unit is connected with the reaction unit and can provide a vacuum environment.
2. The apparatus for preparing a silicon oxygen material according to claim 1, wherein a heat insulating layer is embedded between the reaction chamber and the thermostatic chamber.
3. The apparatus for preparing a silicone material according to claim 1, wherein the collecting unit comprises a deposition plate and a rotary doctor blade, wherein,
the deposition disc is positioned at one end of the thermostatic chamber, which is away from the reaction chamber;
the rotating doctor blade is capable of stripping off the product deposited on the deposition disc.
4. The device for preparing a silicon oxygen material according to claim 1, wherein a notch is formed below one end of the thermostatic chamber, which is away from the reaction chamber;
the storage unit comprises a temporary storage chamber and a storage chamber which are connected, wherein the temporary storage chamber is lower than the thermostatic chamber and is connected with the notch through a pipeline, and the storage chamber can collect products from the temporary storage chamber.
5. The apparatus for preparing silica material according to claim 4, wherein the temporary storage chamber is provided with a stirring mechanism inside and a circulation cooling system outside.
6. The apparatus for preparing a silica material according to claim 1, wherein one end of the transfer unit is connected to the feeding unit and the other end is protruded into the reaction chamber, and the transfer unit comprises a sleeve and a screw feeding shaft provided in the sleeve.
7. The apparatus for preparing silica material according to claim 6, wherein the sleeve is provided with a plurality of through holes on the shaft body in the reaction chamber.
8. The apparatus for preparing a silicon oxygen material according to claim 7, wherein the number of the through holes is plural and is uniformly opened.
9. The silicone material preparation device of claim 1, further comprising an electronic control system.
10. The apparatus for producing a silicone material according to claim 1, further comprising a base, wherein the feeding unit and the reaction unit are mounted on the base.
CN202321468008.1U 2023-06-09 2023-06-09 Silica material preparation facilities Active CN220276916U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202321468008.1U CN220276916U (en) 2023-06-09 2023-06-09 Silica material preparation facilities

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202321468008.1U CN220276916U (en) 2023-06-09 2023-06-09 Silica material preparation facilities

Publications (1)

Publication Number Publication Date
CN220276916U true CN220276916U (en) 2024-01-02

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Application Number Title Priority Date Filing Date
CN202321468008.1U Active CN220276916U (en) 2023-06-09 2023-06-09 Silica material preparation facilities

Country Status (1)

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CN (1) CN220276916U (en)

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