Efficient energy-saving porous carbon preparation device

Abstract

The utility model discloses an efficient and energy-saving porous carbon preparation device which comprises a feeding device, a pore-forming device, a gas treatment device, a combustion and steam generation device, a water storage tank, a material storage device and a smoke exhaust chimney, a discharging port of the feeding device is connected with a feeding port in the top of the pore-forming device through a pipeline, an inlet of the gas treatment device is connected with a gas outlet in the top of the pore-forming device through a pipeline, and a gas outlet of the gas treatment device is connected with a gas inlet of the combustion and steam generation device through a pipeline. An inlet of the water storage tank is connected with a water outlet of the gas treatment device through a pipeline, and a feeding port of the material storage device is connected with a discharging port in the lower portion of the pore forming device through a pipeline. According to the utility model, recycling and reaction of waste heat and waste gas are realized, the production investment is reduced, and the emission of pollutants is greatly reduced; the vertical pore-forming device is wide in application range, and the product quality is guaranteed; and compared with the existing process and equipment, the pore-forming reaction time is greatly shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of porous carbon material preparation, and particularly relates to a high-efficiency and energy-saving porous carbon preparation device. Background Art

[0002] With the continuous improvement of the energy density requirements in the lithium battery industry, the traditional graphite anode material has approached its performance limit (372 mAh / g) and it is difficult to meet the market demand. Under such circumstances, silicon materials (4200 mAh / g) are considered to be the most promising anode materials for lithium-ion batteries due to their high theoretical specific capacity, moderate chemical potential, rich reserves, environmental friendliness and low price. Although silicon materials have obvious advantages, they also face a severe challenge, with a swelling rate of up to 300%, which may cause the material to powder and crack during the cycling process. To solve the swelling problem of silicon materials, researchers have tried various methods, and the most promising technology is to deposit a certain amount of nano-silicon in the pores by cracking silane gas on a porous carbon substrate, thus well solving the volume effect of the silicon-based anode.

[0003] The cleverness of this new type of silicon anode material lies in the porous structure inside the porous carbon. The voids in the porous structure reserve a buffer space for the volume expansion of silicon particles, enhancing the stability and structural strength of the material, and showing excellent performance in high-energy density lithium batteries. As the core raw material of the new type of silicon-carbon, porous carbon is becoming increasingly prominent in the silicon-carbon anode industry. The performance and production capacity of porous carbon will seriously affect the future development of the new type of silicon-carbon anode. Therefore, the preparation of porous carbon has become an urgent problem to be solved. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a high-efficiency and energy-saving porous carbon preparation device, which can prepare porous carbon suitable for the requirements of the new type of silicon-carbon anode and is suitable for large-scale production.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A high-efficiency and energy-saving porous carbon preparation device includes a feeding device, a pore-forming device, a gas treatment device, a combustion and steam generation device, a water storage tank, a storage device and a smoke exhaust chimney;

[0007] The discharge port of the feeding device is connected to the top feeding port of the pore-forming device through a pipeline, the inlet of the gas treatment device is connected to the top gas outlet of the pore-forming device through a pipeline, and the outlet of the gas treatment device is connected to the inlet of the combustion and steam generation device through a pipeline; the inlet of the water storage tank is connected to the outlet of the gas treatment device through a pipeline;

[0008] The combustion and steam generation device is provided with a first exhaust port, a second exhaust port, a water vapor outlet and a water inlet. The first exhaust port and the water vapor outlet are respectively connected to the bottom air inlet of the hole-making device through pipelines. The second exhaust port is connected to the smoke exhaust chimney through a pipeline. The water inlet is connected to the water outlet of the water storage tank through a pipeline;

[0009] The feed inlet of the storage device is connected to the lower discharge outlet of the hole-making device through a pipeline.

[0010] Specifically, both the feeding device and the storage device are sealed bins.

[0011] Specifically, the hole-making device is a vertical heating reaction furnace.

[0012] Specifically, the gas treatment device is a gas-liquid separator.

[0013] Specifically, the combustion and steam generation device includes a burner and a heat exchanger arranged in the burner. The air inlet, the first exhaust port and the second exhaust port are arranged on the burner; the water vapor outlet and the water inlet are arranged on the heat exchanger.

[0014] Specifically, valves are arranged on all pipelines except the pipeline between the water inlet of the combustion and steam generation device and the water outlet of the water storage tank.

[0015] Due to the adoption of the above-mentioned technical solution, the present utility model has the following advantages:

[0016] In the high-efficiency and energy-saving porous carbon preparation device of the present utility model, hydrogen and carbon monoxide generated during the hole-making process of the carbon material are converted into carbon dioxide and water vapor through combustion and then introduced into the hole-making device for recycling and reaction. The waste heat and waste gas are effectively utilized, reducing production input and greatly reducing pollutant emissions; the vertical hole-making device can meet the hole-making of carbon materials with a particle size of 5-200 μm, with a wide application range and ensuring product quality; the cooperation between various devices is high, and compared with the existing processes and equipment, the hole-making reaction time is greatly shortened, improving production efficiency. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the whole of the present utility model.

[0018] In the figure: 1 - feeding device, 2 - hole-making device, 3 - gas treatment device, 4 - combustion and steam generation device, 5 - water storage tank, 6 - storage device, 7 - smoke exhaust chimney. Detailed Embodiments

[0019] The present utility model will be further explained and illustrated below in conjunction with the drawings and embodiments. The protection scope of the present utility model cannot be limited hereby. The purpose of disclosing the present utility model is to protect all technical improvements within the scope of the present utility model.

[0020] Combined with the attached Figure 1 Shown is a high-efficiency and energy-saving porous carbon preparation device, including a feeding device 1, a pore-forming device 2, a gas treatment device 3, a combustion and steam generation device 4, a water storage tank 5, a material storage device 6, and a smoke exhaust chimney 7.

[0021] Both the feeding device 1 and the material storage device 6 are sealed silos; the pore-forming device 2 is a vertical heating reaction furnace with a heat-insulating layer on the outside; the discharge port of the feeding device 1 is connected to the top feeding port of the pore-forming device 2 through a pipeline; the feeding port of the material storage device 6 is connected to the lower discharge port of the pore-forming device 2 through a pipeline; the gas treatment device 3 is a gas-liquid separator, the inlet of the gas treatment device 3 is connected to the top gas outlet of the pore-forming device 2 through a pipeline, and the outlet of the gas treatment device 3 is connected to the inlet of the combustion and steam generation device 4 through a pipeline; the inlet of the water storage tank 5 is connected to the outlet of the gas treatment device 3 through a pipeline.

[0022] The combustion and steam generation device 4 includes a burner and a heat exchanger arranged inside the burner. The burner is provided with an air inlet, a first exhaust port, and a second exhaust port; the heat exchanger is provided with a steam outlet and a water inlet; the first exhaust port and the steam outlet are respectively connected to the bottom air inlet of the pore-forming device 2 through pipelines, the second exhaust port is connected to the smoke exhaust chimney 7 through a pipeline, and the water inlet is connected to the outlet of the water storage tank 5 through a pipeline.

[0023] Valves are provided on all the pipelines except the pipeline between the water inlet of the heat exchanger and the outlet of the water storage tank 5.

[0024] At the initial operation, the valve on the discharge port pipeline of the pore-forming device 2 is closed, the carbon material is quantitatively transported from the discharge port of the feeding device 1 along the pipeline into the pore-forming device 2, and the valve at the discharge port of the feeding device 1 is closed; the pore-forming device 2 starts to heat up, and at the same time, the valve on the upper gas outlet pipeline is opened, and the valves on the first exhaust port and the steam outlet pipeline of the combustion and steam generation device 4 leading to the pore-forming device 2 are closed. The gas generated during the pore-forming process of the carbon material in the pore-forming device 2 is subjected to gas-liquid separation by the gas treatment device 3, and the separated hydrogen and carbon monoxide gases enter the burner through the pipeline, burn, and then enter the smoke exhaust chimney 7 through the second exhaust port and are discharged.

[0025] After the temperature inside the hole-making device 2 reaches the set temperature, close the valve on the pipeline leading to the smoke exhaust chimney 7, and open the valves on the two pipelines leading from the combustion and steam generation device 4 to the hole-making device 2. The carbon dioxide and water vapor generated after the gas in the burner burns enter the hole-making device 2 through the first exhaust port and the pipeline. After the system operates for a period of time, open the valve on the pipeline between the water outlet of the gas treatment device 3 and the water storage tank 5. The water in the water storage tank 5 that enters the heat exchanger coil becomes water vapor after heat exchange and is introduced into the hole-making device 2 through the water vapor outlet. When the pressure inside the control system reaches a certain value during the system operation, open the valve leading to the smoke exhaust chimney 7. After the hole-making reaction ends, close the valves on the two pipelines leading to the hole-making device 2, close the valve on the water inlet pipeline of the water storage tank 5, turn off the burner, and start cooling. After cooling, open the valve on the pipeline of the discharge port of the hole-making device 2 to convey the carbon material after hole-making to the storage device 6.

[0026] The parts not detailed in the present utility model are prior art.

[0027] The embodiments selected herein for disclosing the invention object of the present utility model are considered suitable at present. However, it should be understood that the present utility model is intended to include all variations and improvements of all embodiments that fall within the scope of this concept and utility model.

Claims

1. A highly efficient and energy-saving porous carbon preparation device, characterized in that: It includes a feeding device, a hole making device, a gas processing device, a combustion and steam generating device, a water storage tank, a material storage device and a smoke exhaust chimney; The discharge port of the feed device is connected to the feed port at the top of the hole-making device through a pipeline, the inlet of the gas treatment device is connected to the gas outlet at the top of the hole-making device through a pipeline, and the gas outlet of the gas treatment device is connected to the gas inlet of the combustion and steam generation device through a pipeline; the inlet of the water storage tank is connected to the water outlet of the gas treatment device through a pipeline; The combustion and steam generating device is provided with a first exhaust port, a second exhaust port, a water vapor outlet and a water inlet, the first exhaust port and the water vapor outlet are respectively connected to the air inlet at the bottom of the hole-making device through pipelines, the second exhaust port is connected to the smoke exhaust chimney through a pipeline, and the water inlet is connected to the water outlet of the water storage tank through a pipeline; The feed port of the material storage device is connected to the lower discharge port of the hole-making device through a pipeline.

2. The high-efficiency and energy-saving porous carbon preparation device according to claim 1, characterized in that: The feeding device and the storage device are both sealed silos.

3. The high-efficiency and energy-saving porous carbon preparation device according to claim 1, characterized in that: The pore-making device is a vertical heating reaction furnace.

4. The high-efficiency and energy-saving porous carbon preparation device according to claim 1, characterized in that: The gas processing device is a gas-liquid separator.

5. The high-efficiency and energy-saving porous carbon preparation device according to claim 1, characterized in that: The combustion and steam generating device comprises a burner and a heat exchanger arranged in the burner, the air inlet, the first exhaust port and the second exhaust port are arranged on the burner; the water vapor outlet and the water inlet are arranged on the heat exchanger.

6. The high-efficiency and energy-saving porous carbon preparation device according to claim 1, characterized in that: Valves are arranged on all pipelines except the pipeline between the water inlet of the combustion and steam generating device and the water outlet of the water storage tank.

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