Continuous resin carbonization system

Abstract

The utility model provides a continuous type resin carbonization system, the continuous type resin carbonization system comprises a gas source, and a feed bin, a pre-oxidation reaction mechanism and a carbonization reaction mechanism which are arranged in sequence according to a feed sequence, the pre-oxidation reaction mechanism comprises a first fluidizing furnace and a first collecting bin which are connected in sequence according to the feed sequence, and the carbonization reaction mechanism comprises a second fluidizing furnace and a second collecting bin which are connected in sequence according to the feed sequence; a first fluidizing area, a first heating area and a first collecting area are sequentially arranged in the first fluidizing furnace from bottom to top; a first fluidization plate is arranged below the first fluidization area, and the first collection area is connected with a first collection bin; the carbonization reaction mechanism comprises a second fluidizing furnace and a second collecting bin which are sequentially connected according to the feeding sequence; a second fluidization area, a second heating area and a second collection area are sequentially arranged in the second fluidization furnace from bottom to top; a second fluidization plate is arranged below the second fluidization area, and the second collection area is connected with a second collection bin; the gas source is respectively connected with the feeding bin, the pre-oxidation reaction mechanism and the carbonization reaction mechanism. The device disclosed by the utility model has the beneficial effect of high preparation efficiency.

Description

Technical Field

[0001] The utility model relates to the field of porous carbon preparation devices, and in particular to a continuous resin carbonization system. Background Art

[0002] With the vigorous development of the lithium battery industry, society has put forward higher requirements for its energy density. Silicon-carbon negative electrodes have attracted widespread attention in the industry due to their characteristics such as high energy density and high first coulombic efficiency. The preparation of porous carbon plays a key role in the preparation of silicon-carbon negative electrode materials by silane deposition. The porous carbon currently used for silane deposition in China mainly includes phenolic resin-based, biomass-based, asphalt-based, etc. The naturally formed pore structure of biomass-based porous carbon is complex and the morphology is uncontrollable; the preparation method of asphalt-based porous carbon is complicated because its raw material asphalt contains a large amount of impurities.

[0003] Resin-based porous carbon has the characteristics of low cost, high porosity, high specific surface area, and stable and adjustable pore structure. It is one of the important candidates for porous carbon used in the preparation of silicon-carbon negative electrodes by silane deposition. At present, in the production process of resin-based porous carbon, a pre-oxidation reaction is required first, and then a carbonization reaction is carried out. The reaction time is long, which will cause heat loss and waste. In the production process of resin using a traditional rotary kiln, due to the complex reactions such as cyclization and cross-linking that will occur in the resin molecular chain during the pre-oxidation and carbonization stages, the product is prone to sticking together into blocks. During the carbonization process, tail gas will also be generated, causing environmental pollution. Therefore, it is necessary to design a resin carbonization system that can improve preparation efficiency and has less environmental pollution. Utility Model Content

[0004] The present invention aims to solve at least one of the above-mentioned deficiencies in the prior art. For example, one of the purposes of the present invention is to provide a resin carbonization system that is simple in process, has low pollution, and can achieve continuous production.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a continuous resin carbonization system on the one hand, which may include a gas source and a feed bin, a pre-oxidation reaction mechanism and a carbonization reaction mechanism arranged in sequence according to the feeding order, wherein the pre-oxidation reaction mechanism may include a first fluidizing furnace and a first collecting bin connected in sequence according to the feeding order; a first fluidizing zone, a first heating zone and a first collecting zone are arranged in sequence from bottom to top in the first fluidizing furnace; a first fluidizing plate is arranged below the first fluidizing zone, and the first collecting zone is connected to the first collecting bin; the carbonization reaction mechanism may include a second fluidizing furnace and a second collecting bin connected in sequence according to the feeding order; a second fluidizing zone, a second heating zone and a second collecting zone are arranged in sequence from bottom to top in the second fluidizing furnace; a second fluidizing plate is arranged below the second fluidizing zone, and the second collecting zone is connected to the second collecting bin; the gas source may be connected to the feed bin, the pre-oxidation reaction mechanism and the carbonization reaction mechanism respectively.

[0006] According to one or more exemplary embodiments of one aspect of the present invention, a first cyclone separator may be provided between the first collection area and the first collection bin; and a second cyclone separator may be provided between the second collection area and the second collection bin.

[0007] According to one or more exemplary embodiments of an aspect of the present invention, the first cyclone separator and the second cyclone separator may include ceramic cyclone separators.

[0008] According to one or more exemplary embodiments of one aspect of the present invention, the continuous resin carbonization system may further include an exhaust gas processor, and the exhaust gas processor is respectively connected to the pre-oxidation reaction mechanism and the carbonization reaction mechanism.

[0009] According to one or more exemplary embodiments of an aspect of the present invention, the exhaust gas processor may include a combustion-type exhaust gas processor.

[0010] According to one or more exemplary embodiments of one aspect of the present invention, a filter may be provided at the connection between the first collection area, the second collection area and the exhaust gas processor.

[0011] According to one or more exemplary embodiments of one aspect of the present invention, a first fluidizing carrier gas inlet may be provided under the first fluidizing plate; a second fluidizing carrier gas inlet may be provided under the second fluidizing plate, and the gas source is connected to the first fluidizing carrier gas inlet and the second fluidizing carrier gas inlet.

[0012] According to one or more exemplary embodiments of one aspect of the present invention, the gas source may introduce air into the first fluidizing carrier gas inlet; and the gas source may introduce an inert gas into the second fluidizing carrier gas inlet.

[0013] According to one or more exemplary embodiments of one aspect of the present invention, a first screw feeder may be provided between the feeding bin and the first fluidizing furnace; and a second screw feeder may be provided between the first collecting bin and the second fluidizing furnace.

[0014] According to one or more exemplary embodiments of an aspect of the present invention, the pre-oxidation reaction mechanism may be distributed in parallel with the carbonization reaction mechanism.

[0015] Compared with the prior art, the beneficial effects of the present invention include at least one of the following:

[0016] (1) The resin carbonization system provided by the present invention adopts a split design with different reaction sections to achieve continuous production of resin-based porous carbon, reduce energy consumption under the same production capacity, and reduce the loss of heating equipment;

[0017] (2) The resin carbonization system provided by the present invention reduces the adhesion and agglomeration of the resin during the pre-oxidation and carbonization processes, improves the consistency of the product, and avoids material loss during the subsequent particle classification process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects and / or features of the present invention will become more apparent from the following description in conjunction with the accompanying drawings, in which:

[0019] Figure 1 The figure shows a structural schematic diagram of a self-continuous resin carbonization system according to an exemplary embodiment of the present invention.

[0020] Description of main reference numerals:

[0021] 1-feeding bin, 2-first screw feeder, 3-first fluidizing furnace, 4-second fluidizing furnace, 5-gas source, 6-first fluidizing plate, 7-first fluidizing zone, 8-first heating zone, 9-first collecting zone, 10-first collecting bin, 11-second screw feeder, 12-second collecting bin, 13-exhaust gas processor, 14-filter, 15-second fluidizing zone, 16-second heating zone, 17-second collecting zone, 18-second fluidizing plate. DETAILED DESCRIPTION

[0022] Hereinafter, the continuous resin carbonization system of the present invention will be described in detail with reference to exemplary embodiments.

[0023] In the description of this application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application 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 understood as a limitation on this application.

[0024] The terms "first," "second," etc., are used solely for convenience of description and distinction and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Therefore, a feature designated "first," "second," etc. may explicitly or implicitly include one or more of such features.

[0025] In the description of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; they can refer to direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] First Exemplary Embodiment

[0027] The present exemplary embodiment provides a continuous resin carbonization system.

[0028] Figure 1 A schematic diagram of a self-continuous resin carbonization system according to an exemplary embodiment of the present invention is shown below. Figure 1 The self-continuous resin carbonization system of this exemplary embodiment will be described.

[0029] In this exemplary embodiment, Figure 1 As shown in , the continuous resin carbonization system mainly includes a gas source 5 and a feeding bin 1, a pre-oxidation reaction mechanism and a carbonization reaction mechanism arranged in sequence according to the feeding order.

[0030] The pre-oxidation reaction mechanism may include a first fluidizing furnace 3 and a first collecting bin 10 connected in sequence according to the feeding sequence. The first fluidizing furnace 3 may be connected to the first collecting bin 10 via a pipeline. A first fluidizing zone 7, a first heating zone 8, and a first collecting zone 9 are sequentially arranged in the first fluidizing furnace 3 from bottom to top. A first fluidizing plate 6 is arranged below the first fluidizing zone 7, and the first collecting zone 9 is connected to the first collecting bin 10. The structure of the carbonization reaction mechanism is similar to that of the pre-oxidation reaction mechanism, and may include a second fluidizing furnace 4 and a second collecting bin 12 connected in sequence according to the feeding sequence. The second fluidizing furnace 4 may be connected to the second collecting bin 12 via a pipeline. A second fluidizing zone 15, a second heating zone 16, and a second collecting zone 17 are sequentially arranged in the second fluidizing furnace 4 from bottom to top. A second fluidizing plate 18 is arranged below the second fluidizing zone 15, and the second collecting zone 17 is connected to the second collecting bin 12. The gas source 5 may be connected to the feeding bin 1, the pre-oxidation reaction mechanism, and the carbonization reaction mechanism, respectively.

[0031] In this exemplary embodiment, a first cyclone separator may be positioned between the first collection zone and the first collection bin to enable gas-solid separation after the pre-oxidation reaction and product recovery. A second cyclone separator may be positioned between the second collection zone and the second collection bin to enable gas-solid separation after the carbonization reaction and product recovery. Specifically, the first and second cyclones may be ceramic cyclones.

[0032] In this exemplary embodiment, Figure 1As shown in , the continuous resin carbonization system may further include an exhaust gas processor 13. The tops of the first collection area 9 and the second collection area 17 may be respectively provided with gas outlets, and the gas outlets may be externally connected to gas pipes. The exhaust gas processor 13 is simultaneously connected to the gas pipes of the first collection area 9 and the second collection area 17. The exhaust gas processor 13 receives and processes harmful gases generated during the pre-oxidation and carbonization process to protect the environment. Here, the exhaust gas processor may include a combustion-type exhaust gas processor. The combustion-type exhaust gas processor can efficiently and comprehensively destroy harmful gases generated during the carbonization process and protect the environment.

[0033] In this exemplary embodiment, Figure 1 As shown in FIG, a filter 14 may be provided at the gas outlet of the first collection area 9 and the second collection area 17. The filter 14 can absorb the tar produced in the pre-oxidation reaction and the carbonization reaction stage and prevent the material from being carried out by the carrier gas, thereby avoiding clogging the gas pipeline.

[0034] In this exemplary embodiment, Figure 1 As shown in FIG, a first fluidizing carrier gas inlet may be provided below the first fluidizing plate 6; a second fluidizing carrier gas inlet may be provided below the second fluidizing plate 18. The gas source 5 is connected to both the first and second fluidizing carrier gas inlets. The gas source can introduce air into the first fluidizing carrier gas inlet and an inert gas into the second fluidizing carrier gas inlet. Specifically, the gas source 5 provides air to the first fluidizing furnace 3 through the first fluidizing carrier gas inlet to fluidize the resin feedstock. The carrier gas converts the resin feedstock into a fluidized state. Under the action of the carrier gas, the resin feedstock enters the first heating zone 8, which heats the fluidized resin feedstock. The fluidized resin feedstock boils in the first fluidizing zone 7, causing a pre-oxidation reaction. After the pre-oxidation reaction is complete, the carrier gas pressure can be controlled to transfer the pre-oxidized resin to the first collection bin 10. The carrier gas converts the pre-oxidized resin into a fluidized state. Under the action of the carrier gas, the fluidized resin enters the second heating zone 16, where a carbonization reaction occurs. After the carbonization reaction is complete, the pressure of the carrier gas can be controlled again to transfer the carbonized resin to the second collection chamber 12. In particular, the inert gas may include one or more of nitrogen, argon, and helium, more preferably nitrogen. In addition, the gas source 5 is also connected to the first collection chamber 10 and the second collection chamber 12. Specifically, the gas source 5 introduces carrier gas into the first collection chamber 10 and the second collection chamber 12, and the first collection chamber 10 and the second collection chamber 12 collect the carrier gas, bringing the products in the first collection area 9 and the second collection area 17 into the collection chamber.

[0035] In this exemplary embodiment, Figure 1 As shown in FIG, a first screw feeder 2 may be provided between the feed bin 1 and the first fluidizing furnace 3 ; a second screw feeder 11 may be provided between the first collecting bin 10 and the second fluidizing furnace 4 .

[0036] In this exemplary embodiment, Figure 1 As shown in , the pre-oxidation reaction mechanism can be distributed in parallel with the carbonization reaction mechanism.

[0037] The carbonization method of the continuous resin carbonization system of the present invention may include: the resin raw material in the feed bin is conveyed into the first fluidized furnace by a first screw feeder. At the same time, air is introduced into the first fluidized furnace to fluidize the resin, and the heating zone begins to heat. The material is in a boiling state in the fluidized bed, which reduces the adhesion and agglomeration of the resin during the pre-oxidation and carbonization processes, improves the uniformity and consistency of the product particles, and avoids material loss in the subsequent crushing process. After the pre-oxidation is completed, the carrier gas pressure is controlled, and the intermediate product is blown into the first cyclone separator and enters the first collection bin. It is then sent to the second fluidized furnace by the second screw feeder for carbonization, and after the carbonization is completed, it enters the second collection bin for cooling and discharge.

[0038] In summary, the advantages of the present invention may include at least one of the following:

[0039] (1) The resin carbonization system provided by the present invention is provided with a fluidizing plate, which reduces the adhesion and agglomeration of the resin during the pre-oxidation and carbonization process, ensures the integrity of the precursor morphology, improves the consistency of the product, and avoids material loss during the subsequent particle classification process;

[0040] (2) The digital carbonization system provided by the utility model can realize the continuous production of resin carbonization, save preparation time and improve the quality of the finished product;

[0041] (3) The resin carbonization system provided by the utility model can treat harmful gases generated during conversation and reduce environmental pollution.

[0042] Although a continuous resin carbonization system of the present invention has been described above in conjunction with exemplary embodiments, it should be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope defined by the claims.

Claims

1. A continuous resin carbonization system, characterized in that: The continuous resin carbonization system includes a gas source and a feed bin, a pre-oxidation reaction mechanism and a carbonization reaction mechanism arranged in sequence according to the feeding order, wherein: The pre-oxidation reaction mechanism includes a first fluidized furnace and a first collecting bin connected in sequence according to the feeding order; the first fluidized furnace is provided with a first fluidized zone, a first heating zone and a first collecting zone from bottom to top; a first fluidized plate is provided below the first fluidized zone, and the first collecting zone is connected to the first collecting bin; The carbonization reaction mechanism includes a second fluidized furnace and a second collecting bin connected in sequence according to the feeding order; the second fluidized furnace is provided with a second fluidizing zone, a second heating zone and a second collecting zone from bottom to top; a second fluidizing plate is provided below the second fluidizing zone, and the second collecting zone is connected to the second collecting bin; The gas source is respectively connected with the feed bin, the pre-oxidation reaction mechanism and the carbonization reaction mechanism.

2. The continuous resin carbonization system according to claim 1, characterized in that: A first cyclone separator is provided between the first collection area and the first collection bin; a second cyclone separator is provided between the second collection area and the second collection bin.

3. The continuous resin carbonization system according to claim 2, characterized in that: The first cyclone separator and the second cyclone separator include ceramic cyclone separators.

4. The continuous resin carbonization system according to claim 1, characterized in that: The continuous resin carbonization system further includes an exhaust gas processor, which is connected to the pre-oxidation reaction mechanism and the carbonization reaction mechanism respectively.

5. The continuous resin carbonization system according to claim 4, characterized in that: The exhaust gas processor includes a combustion type exhaust gas processor.

6. The continuous resin carbonization system according to claim 4, characterized in that: A filter is provided at the connection between the first collection area, the second collection area and the exhaust gas processor.

7. The continuous resin carbonization system according to claim 1, characterized in that: A first fluidizing carrier gas inlet is provided below the first fluidizing plate; a second fluidizing carrier gas inlet is provided below the second fluidizing plate, and a gas source is connected to the first fluidizing carrier gas inlet and the second fluidizing carrier gas inlet.

8. The continuous resin carbonization system according to claim 7, characterized in that: The gas source introduces air into the first fluidized carrier gas inlet; and the gas source introduces an inert gas into the second fluidized carrier gas inlet.

9. The continuous resin carbonization system according to claim 1, characterized in that: A first screw feeder is provided between the feeding bin and the first fluidizing furnace; and a second screw feeder is provided between the first collecting bin and the second fluidizing furnace.

10. The continuous resin carbonization system according to claim 1, characterized in that: The pre-oxidation reaction mechanism and the carbonization reaction mechanism are distributed in parallel.

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