Novel porous carbon preparation system
Through the direct heating method of combining the main reactor and the burner, the problems of large energy consumption and high pollutant emissions in the porous carbon preparation equipment are solved, and efficient production is achieved.
Patent Information
- Application Number
- CN202422117518.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The existing porous carbon preparation equipment has problems such as large energy consumption, high pollutant emissions and low production efficiency.
The direct heating method of combining the main reactor and the burner is adopted to fluidize and create pores using the water and carbon dioxide gas generated by the burner combustion, and uniform heating is achieved with a gas shunt, reducing energy consumption and improving production efficiency.
It greatly reduces energy consumption and pollutant emissions, and improves the production efficiency of porous carbon.
Smart Images
Figure CN223073922U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of porous carbon preparation, and particularly relates to a novel porous carbon preparation system. Background Art
[0002] Silicon materials are considered to be the most promising anode materials for lithium-ion batteries due to their high theoretical specific capacity of 4200 mAh / g, moderate chemical potential, rich reserves, environmental friendliness and low price. Although silicon materials have obvious advantages, they also face a severe challenge. Its expansion rate of up to 300% may cause the material to powder and crack during the cycling process. To solve the expansion problem of silicon materials, 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 silicon-based anodes. 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 silicon-carbon, the status of porous carbon in the silicon-carbon anode industry is becoming increasingly prominent. The quality and production capacity of porous carbon will seriously affect the future development of the new silicon-carbon anode. Existing porous carbon preparation equipment all adopts an external heating fluidized bed, with large heat transfer losses through the furnace shell, high energy consumption, and difficult control of the doped influencing gases in the pore-forming reaction, resulting in unqualified quality of the porous carbon finished product, low production efficiency, and large pollutant emissions. Summary of the Invention
[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a novel porous carbon preparation system, which improves the thermal efficiency and reduces energy consumption and pollutant emissions.
[0004] The technical solution adopted by the utility model is as follows:
[0005] A novel porous carbon preparation system includes a main reactor and a burner;
[0006] The main reactor is of a multi-section vertical cylindrical structure, which is successively a gas mixing chamber in the shape of an inverted frustum, a cylindrical furnace tube main body, and a gas purification chamber with a large diameter section from bottom to top. An air inlet and a discharge port are arranged at the bottom of the gas mixing chamber, and a feed port and an exhaust port are arranged on the gas purification chamber; a gas diverter is horizontally arranged at the connection between the gas mixing chamber and the furnace tube main body;
[0007] The outlet of the burner is connected to the air inlet at the bottom of the main reactor through a pipeline, and an auxiliary combustion gas inlet is also arranged on this pipeline. The gas source of the burner is a hydrocarbon.
[0008] Specifically, the diameter of the furnace tube main body section of the main reactor is ≥300 mm, and a heat preservation material layer or a furnace wall heating and heat preservation component is arranged outside.
[0009] Specifically, the average particle size of the carbon particles loaded in the main reactor is 5 μm - 5 mm, and the loose bulk density of the carbon particles is 0.4 - 1.0 g / cm 3 .
[0010] Specifically, the feed inlet of the main reactor is connected to a sealed feed bin, and the discharge outlet is connected to a sealed storage bin.
[0011] Specifically, a filter screen or filter is provided at the exhaust outlet of the gas purification chamber.
[0012] Specifically, the gas diverter is a perforated plate.
[0013] Specifically, the hydrocarbon is one or more of methane, propane, and propylene.
[0014] Specifically, the combustion-supporting gas is air, oxygen, or a mixture of the two gases.
[0015] Due to the adoption of the above technical solution, the present utility model has the following advantages:
[0016] The technical solution of combining the main reactor and the burner of the present utility model realizes the direct heating method to heat the material, greatly improving the heating efficiency. The water and carbon dioxide gases generated by the combustion of the burner not only play the role of fluidizing the material, but also are the reaction gases required for pore formation; compared with the existing processes and equipment, it not only greatly reduces the energy consumption and pollutant emissions, but also greatly improves the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is the overall schematic diagram of the present utility model; the arrows in the figure indicate the inlet and outlet directions of the gas.
[0018] Figure 2 is the schematic diagram of the material flow in the reactor of the present utility model; the upward arrows in the figure indicate the gas flow direction, and the circular arrows indicate the material flow direction in the fluidized state.
[0019] In the figure: 1 - main reactor, 11 - gas mixing chamber, 111 - discharge outlet, 12 - furnace tube main body, 13 - gas purification chamber, 131 - feed inlet, 132 - exhaust outlet, 14 - gas diverter, 2 - burner, 21 - combustion-supporting gas inlet, 3 - heat-insulating material layer. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] 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.
[0021] Combined with the attachedFigure 1-2 A novel porous carbon preparation system shown in the figure includes a main reactor 1 and a burner 2.
[0022] The main reactor 1 is a multi-section vertical cylindrical structure, which from bottom to top are a frustum-shaped gas mixing chamber 11, a cylindrical furnace tube body 12, and a large-diameter gas purification chamber 13; an air inlet and a discharge port 111 are provided at the bottom of the gas mixing chamber 11, and the discharge port 111 is connected to a sealed storage bin; the diameter of the furnace tube body 12 section is ≥300 mm, and a heat insulation material layer 3 is provided outside; a feed port 131 and an exhaust port 132 are provided on the gas purification chamber 13, the feed port 131 is connected to a sealed feed bin, and a filter screen or a filter is provided on the exhaust port 132 and is connected to an external flue gas treatment system; a gas diverter 14 is horizontally provided at the connection between the gas mixing chamber 11 and the furnace tube body 12, and the gas diverter 14 is a perforated plate member.
[0023] The outlet of the burner 2 is connected to the bottom air inlet of the main reactor 1 through a pipeline, and an auxiliary combustion gas inlet 21 is also provided on this pipeline. The gas source of the burner 2 is one or more of methane, propane, and propylene; the auxiliary combustion gas is air, oxygen, or a mixture of the two gases.
[0024] In the novel porous carbon preparation system of the present utility model, carbon particles are transported into the main reactor 1 through the feed port 131 and the conveying valve is closed. The average particle size of the carbon particles is 5 μm - 5 mm, and the loose bulk density is 0.4 - 1.0 g / cm 3 ; hydrocarbon gas is introduced into the burner 2. The burner 2 is a pressure burner 2 with an electronic proportional regulation function. By adjusting the burner 2, the combustion temperature and the oxygen content of the combustion gas are regulated to meet the index requirements. The high-temperature water and carbon dioxide gas generated by combustion are mixed with the auxiliary combustion gas in the gas mixing chamber 11 and uniformly rise upward through the gas diverter 14. The holes on the gas diverter 14 form several burners to directly heat the materials in the furnace. The materials in the furnace can be heated to a maximum of 1000 °C, and the combustion gas pressure can reach 0.03 Mpa, realizing fluidized heating of the materials and pore-forming reaction; the waste gas generated during the reaction enters the external flue gas treatment system through the exhaust port 132. When the temperature in the furnace reaches the set temperature, the flame temperature is adjusted to keep the pressure in the furnace not exceeding 0.02 Mpa. After the reaction ends, the burner 2 is closed and the temperature starts to drop; when the temperature drops below 50 degrees Celsius, the valve of the discharge port 111 is opened to start discharging materials.
[0025] The parts not detailed in the present utility model are prior art.
[0026] The embodiments selected in this article to disclose the invention purpose of the present utility model are currently considered appropriate. However, it should be understood that the present utility model is intended to include all variations and improvements of all embodiments belonging to the concept and scope of the present utility model.
Claims
1. A novel porous carbon preparation system, comprising a main reactor and a burner, characterized in that: The main reactor is a multi-stage vertical cylindrical structure, which from bottom to top is successively an inverted frustum-shaped gas mixing chamber, a cylindrical furnace tube body, and a large-diameter gas purification chamber. An air inlet and a discharge port are provided at the bottom of the gas mixing chamber, and a feed port and an exhaust port are provided on the gas purification chamber; a gas diverter is horizontally arranged at the connection between the gas mixing chamber and the furnace tube body; The outlet of the burner is connected to the air inlet at the bottom of the main reactor through a pipeline, and an auxiliary combustion gas inlet is also provided on this pipeline. The gas source of the burner is hydrocarbon.
2. The novel porous carbon preparation system according to claim 1, characterized in that: The diameter of the furnace tube body section of the main reactor is ≥300 mm, and a heat preservation material layer or a furnace wall heating and heat preservation component is arranged outside.
3. The novel porous carbon preparation system according to claim 1, characterized in that: The average particle size of the carbon particles loaded in the main reactor is 5 μm - 5 mm, and the loose bulk density of the carbon particles is 0.4 - 1.0 g / cm 3 .
4. The novel porous carbon preparation system according to claim 1, wherein: The feed port of the main reactor is connected to a sealed feed bin, and the discharge port is connected to a sealed storage bin.
5. The novel porous carbon preparation system according to claim 1, wherein: A filter screen or a filter is provided on the exhaust port of the gas purification chamber.
6. The novel porous carbon preparation system according to claim 1, characterized in that: The gas diverter is a perforated plate member.