Production system and device for edible activated carbon based on corncobs

Abstract

The invention relates to the technical field of edible activated carbon production, and discloses a corncob-based edible activated carbon production system and device.The production system comprises a crushing module used for crushing corncob raw materials into small particles or powder; the continuous dry distillation and cracking module is used for performing high-temperature dry distillation and cracking treatment on the corncobs crushed by the crushing module; the low-temperature activation furnace module is used for performing low-temperature treatment on the carbonized material so as to change physical and chemical characteristics; and the crushing and batching module is used for crushing the activated materials into fine particles and adding ingredients for mixing. According to the whole device, feeding and drying, cracking and dry distillation, activation, crushing, tabletting, packaging and warehousing are performed in sequence from top to bottom in a completely closed state, pollution and cross contamination from materials to products in the production process are avoided, a DCS system is adopted for operation, no direct contact is achieved between the materials and product packaging in the production process, and the production efficiency is improved. And confusion and errors caused by misoperation of production personnel are avoided to the greatest extent.

Description

Technical Field

[0001] The invention relates to the technical field of edible activated carbon production, and in particular to a system and device for producing edible activated carbon based on corn cobs. Background Art

[0002] In recent years, with the improvement of people's awareness of health and health care, the development of functional materials using biomass resources has become an important research direction. Biomass activated carbon has attracted widespread attention for its unique pore structure and excellent adsorption performance. In particular, products based on biomass activated carbon can effectively absorb oil and harmful substances in the human body because of its strong adsorption capacity. At the same time, since the activated carbon itself will not be digested and absorbed by the human body, it can be discharged with the intestines, thereby achieving the effect of purifying the internal environment, reducing fat and eliminating toxins.

[0003] Foreign markets, such as the United States, Japan, and South Korea, have recognized the potential of biomass activated carbon in the fields of food, health products, and medicines at an early stage, and have launched edible biomass activated carbon products, which have gradually formed an industrialization trend. These products are widely popular among consumers, which not only meet the health needs of modern people, but also promote the application of activated carbon technology in the health field.

[0004] However, in my country, despite the abundance of biomass resources, especially agricultural waste such as corn cobs, which can be used as high-quality activated carbon raw materials, the current domestic technology development and industrialization process in this field is relatively lagging behind, and the system and equipment that can produce biomass activated carbon that can be directly consumed have not yet been established. At the same time, the existing production of biomass activated carbon is mostly used for industrial purposes, lacking the development of technology and equipment to improve its special needs in the fields of food, medicine and health products. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a system and device for producing edible activated carbon based on corn cobs, which solves the problem of the lack of production of directly edible biomass activated carbon in China.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A corncob-based edible activated carbon production system, comprising a crushing module for crushing corncob raw materials into small particles or powder; A continuous dry distillation and cracking module is used to perform high-temperature dry distillation and cracking treatment on the corn cobs crushed by the crushing module; Low temperature activation furnace module, used for low temperature treatment of carbonized materials to change physical and chemical properties; A crushing and batching module is used to crush the activated materials into fine particles and add them into the ingredients for mixing; Tableting and granulation module, used to process the mixed materials into tablets or granules; The packaging module is used to pack, seal and label the finished products.

[0007] A corncob-based edible activated carbon production device, comprising: The drying and cracking combined furnace performs high-temperature dry distillation and cracking treatment on the corn cobs crushed by the crushing module; Low temperature activation furnace, which treats carbonized materials at low temperature to change their physical and chemical properties; The metering tank is installed between the drying and cracking combined furnace and the low-temperature activation furnace to measure the activated carbon produced by the drying and cracking combined furnace and to cache the activated carbon through the metering tank; High-speed crushing device to ultra-finely crush the activated carbon.

[0008] Preferably, the drying and cracking combined furnace includes a drying kiln and a cracking and distillation furnace, the drying kiln is located at the upper part of the cracking and distillation furnace, a discharge port is installed at the bottom of the drying kiln, the top of the cracking and distillation furnace is connected to the discharge port through a flexible connection, the drying kiln and the cracking and distillation furnace are connected through a plurality of U-shaped support plates, a support is installed at the bottom of the cracking and distillation furnace, a box is installed on the outside of the drying kiln, the cracking and distillation furnace is installed inside the box, a variable frequency motor 1 is installed on the outside of the drying kiln, an auger blade 1 is connected to the output end of the variable frequency motor 1, a variable frequency motor 2 is installed on the outside of the cracking and distillation furnace, a group of auger blades 2 are installed at the output end of the variable frequency motor 2, and a plurality of groups of burners 1 are provided at the bottom of the cracking and distillation furnace, and the burner 1 is connected through a natural gas pipeline 1.

[0009] Preferably, the volume of the drying kiln is twice that of the cracking and retorting furnace, which is used to extend the residence time of the materials. The middle of the drying kiln is connected with a main pipeline, and the middle of the cracking and retorting furnace is connected with a branch pipe. The branch pipe and the main pipeline are both connected to an external induced draft fan through an induced draft fan connecting pipe 1.

[0010] Preferably, a discharge port is provided at the bottom of the cracking and distillation furnace, the top of the metering tank is connected to the discharge port through a connecting flange, a sight glass is installed on the outer wall of the metering tank, a sampling port is opened on the outside of the metering tank, an electric butterfly valve is installed at the bottom of the metering tank, and a cleaning hole is opened in the middle of the metering tank.

[0011] Preferably, the low-temperature activation furnace includes an outer cylinder and an inner cylinder, which are sealed to form a combustion chamber, a support seat is installed on the inner wall of the inner cylinder, blind plates are installed at both ends of the inner cylinder, and the outer cylinder is installed between the support seat and the blind plate by welding, a draft fan connecting pipe 2 is installed on the top of the outer cylinder, the other end of the draft fan connecting pipe 2 is connected to an external draft fan, a stainless steel wire filter is installed in the middle of the draft fan connecting pipe 2, a variable frequency motor 3 is installed on the outside of the inner cylinder, the output end of the variable frequency motor 3 passes through the side wall of the inner cylinder and is fixedly installed with a group of auger blades 2, and an electric butterfly valve 2 is installed at the bottom outlet of the inner cylinder.

[0012] Preferably, multiple groups of burner 2 are installed at the bottom of the inner cylinder, and the multiple groups of burner 2 are connected to external natural gas through natural gas pipeline 2. Multiple small holes are opened on the top of the inner cylinder, and pressure sensors and temperature sensors are installed in the small holes. Multiple groups of legs are installed at the bottom of the outer cylinder.

[0013] Preferably, a plurality of circular holes are evenly distributed at an angle in the middle of the auger blade 2, which is located inside the cracking and retorting furnace, and a diameter of the circular hole opened in the middle is half of the axial diameter of the auger blade 2.

[0014] Preferably, the high-speed crushing device includes a high-speed crushing kettle, a variable frequency motor four is installed on the top of the high-speed crushing kettle, the bottom of the variable frequency motor four penetrates the upper side wall of the high-speed crushing kettle and is fixedly connected to a blade through a rotating shaft, a bearing seat is installed at the bottom of the high-speed crushing kettle, the rotating shaft rotates in the middle of the bearing seat, an electric butterfly valve three is installed at the bottom outlet of the high-speed crushing kettle, a flange plate is fixedly connected to the inside of the high-speed crushing kettle, a plurality of mesh holes are opened in the middle of the flange plate, a mesh fence is also installed inside the high-speed crushing kettle, the mesh fence is welded to the top of the flange plate, a screen, a fixed mesh one and a fixed mesh two are installed in the middle of the mesh fence, and the screen, fixed mesh one and fixed mesh two are arranged in a "mesh" shape.

[0015] Preferably, an atomizing nozzle is installed on the top of the high-speed grinding kettle, a liquid material tank is installed in the middle section of the atomizing nozzle through a control valve, the other end of the atomizing nozzle is connected to an external gas source, a second cleaning hole is provided at the bottom of the high-speed grinding kettle, a second sight glass, a pressure gauge and a temperature gauge are installed on the top of the high-speed grinding kettle, and a feed port for feeding is provided on the top of the high-speed grinding kettle.

[0016] Working principle: The corn cobs are broken into blocks of 2cm×5cm and put into the drying kiln through the material inlet. The materials are turned over by the auger blades in the furnace cavity and enter inward. The baking drying rate is determined by the auger speed, which is controlled by the variable frequency motor. The dried materials enter the lower pyrolysis and retort furnace feed port from the discharge port. After the corn cobs enter the pyrolysis and retort furnace cavity, they are slowly pushed by the variable frequency motor 2 and the auger blades, and pyrolysis and gasification reactions are produced in the high temperature environment of 200℃~800℃ in the retort furnace cavity. After the reaction, the corn cob biochar is produced and enters the activation furnace metering tank from the discharge port.

[0017] After the crushed corn cob raw materials are put into the drying kiln and the cracking and distilling furnace, three groups of burners are ignited. While the burners directly heat the bottom of the cracking and distilling furnace shell, the rising waste heat is provided to the drying kiln.

[0018] Start the induced draft fan, the fan air volume is 3m 3 / minDue to the action of the induced draft fan, the drying and cracking system is in a state of slight negative pressure. The surface moisture of the corn cob in the drying kiln cavity is volatilized into water vapor, and the gas containing moisture is discharged by the induced draft fan along the main pipeline under negative pressure. The pipeline is equipped with a temperature sensor and a humidity sensor. The auger speed increases with the change of humidity and temperature in the cavity. The heating section of the outer shell of the cracking and distillation furnace is designed to be concentrated in the middle of the furnace body. The purpose is: the temperature of this area in the cavity can reach 400℃~700℃, the material begins to enter the distillation stage at 300℃~400℃, and begins to crack and gasify at 400℃~700℃. The volatile atmosphere generated by cracking and gasification expands to the negative pressure area at both ends of the furnace cavity in a positive pressure state.

[0019] Two sets of branch pipes connected to the induced draft fan are set at both ends of the cracking and retorting furnace. The branch pipe structure is in the shape of a "mouth". The branch pipe is equipped with a thermal insulation layer and a thermal insulation protective layer. The volatile atmosphere generated by cracking and gasification is discharged through the induced draft fan. The length of the branch pipe is slightly larger than the width of the box. The branch pipe is connected to the main pipeline with a flange. The purpose is that the tar substances generated by the cracking and gasification process of biomass are easy to condense on the pipeline wall. After a period of production, the branch pipe needs to be replaced or cleaned to ensure that the branch pipe is unobstructed. The branch pipe is equipped with a temperature sensor and a pressure transmitter. The purpose is to sense the state of corn cob cracking and gasification in the cracking and retorting furnace cavity through the temperature changes on the front and rear ends of the branch pipes, the difference in the data at both ends, and the reference pressure changes.

[0020] The activated carbon after cracking is discharged from the discharge port and enters the metering tank. Then, the electric butterfly valve 1 is controlled to make the material continue to fall into the low-temperature activation furnace. The frequency conversion motor 3 is used to drive the auger blade 2 inside the inner cylinder to rotate, thereby driving the activated carbon material to move. Then, the burner 2 at the bottom of the inner cylinder is used to heat the inner cavity of the inner cylinder to complete the activation treatment. After the activation, the activated carbon enters the high-speed crushing device from the electric butterfly valve 2. The frequency conversion motor 4 is used to drive the blade to rotate to achieve the crushing of the activated carbon. During the crushing process, the rotation of the blade will generate an upward airflow, thereby driving the fine activated carbon powder to fly upward. After passing through the screen, the powder falls downward and finally falls into the bottom of the high-speed crushing kettle from the gap outside the flange plate. Then, it is discharged through the electric butterfly valve 3 to enter the tableting and granulation module and the packaging module to complete the final processing operation.

[0021] The present invention provides a corncob-based edible activated carbon production system and device, which has the following beneficial effects: 1. The production system of the present invention uses 316L material. The entire device is arranged from feeding drying, cracking distillation, activation, crushing and mixing to tableting, packaging and warehousing, and operates in a completely closed state from top to bottom, avoiding contamination and cross contamination from materials to products during the production process.

[0022] 2. The present invention adopts DCS system operation in the production process. There is no direct contact between materials and product packaging by personnel during the production process, thus avoiding confusion and errors caused by improper operation of production personnel to the greatest extent.

[0023] 3. The present invention uses corn cobs as the main raw material for production. The purpose is that they are widely available. Secondly, because the outside of the corn cobs is wrapped by corn leaves and corn layers, the pollution of pesticide residues is avoided to the greatest extent.

[0024] 4. In the present invention, a soft connection design is adopted between the drying kiln and the cracking retort furnace, and a U-shaped support plate is used as a support structure, which ensures that the displacement of the equipment due to thermal expansion in a high-temperature working environment will not affect the sealing and stability of the equipment structure. In addition, the centralized external heating design in the middle of the cracking retort furnace shell, combined with multiple groups of burners and pipeline hot gas flow design, realizes efficient utilization of thermal energy, and at the same time, the system is maintained in a slightly negative pressure state through the induced draft fan, effectively preventing oxygen from entering the cavity during the cracking process, ensuring the stability of the gasification reaction environment and improving the cracking gasification efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall steps of the overall system in the present invention; Figure 2 It is a schematic plan view of the drying and cracking combined furnace in the present invention; Figure 3This is a schematic diagram of heating the drying and cracking combined furnace in the present invention; Figure 4 This is a schematic diagram of the installation position of the U-shaped support plate in the drying and cracking combined furnace of the present invention; Figure 5 Schematic diagram of the internal structure of the cracking and distillation furnace in the present invention; Figure 6 It is a structural schematic diagram of the metering tank in the present invention; Figure 7 It is a structural schematic diagram of the low temperature activation furnace of the present invention; Figure 8 It is a structural side view of the low temperature activation furnace of the present invention; Fig. 9 It is a schematic diagram of the structure of the auger blade 2 in the present invention; Fig.10 It is a schematic diagram of the structure of the high-speed crushing device in the present invention; Fig.11 It is a structural schematic diagram of the flange plate in the present invention.

[0026] Among them, 1. Drying kiln; 2. One auger blade; 3. One frequency conversion motor; 4. Discharge port; 5. Cracking distillation furnace; 6. Two frequency conversion motors; 7. Discharge port; 8. U-shaped support plate; 9. Support; 10. Box; 11. One burner; 12. One natural gas pipeline; 13. One induced draft fan connecting pipe; 14. Main pipeline; 15. Branch pipe; 16. Connecting flange; 17. One sight glass; 18. Sampling port; 19. One electric butterfly valve; 20. One cleaning hole; 21. Two electric butterfly valves; 22. Two auger blades; 23. Outer cylinder; 24. Inner cylinder; 25. Support seat; 26. Blind plate; 27. Variable frequency motor three; 29. ​​induced draft fan connecting pipe two; 30. stainless steel wire filter; 31. burner two; 32. natural gas pipeline two; 33. support leg; 34. pressure sensor; 35. temperature sensor; 36. variable frequency motor four; 37. blade; 38. liquid material tank; 39. atomizing nozzle; 40. sight glass two; 41. high-speed crushing kettle; 42. mesh fence; 43. screen; 44. fixed net one; 45. fixed net two; 46. flange plate; 47. mesh; 48. bearing seat; 49. electric butterfly valve three; 50. cleaning hole two; 51. pressure gauge; 52. temperature gauge; 53. feed inlet. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Example: Please refer to the attached Figure 1 The embodiment of the present invention provides a corncob-based edible activated carbon production system, comprising: A crushing module, used to crush the corn cob raw materials into small particles or powder; A continuous dry distillation and cracking module is used to perform high-temperature dry distillation and cracking treatment on the corn cobs crushed by the crushing module; Low temperature activation furnace module, used for low temperature treatment of carbonized materials to change physical and chemical properties; A crushing and batching module is used to crush the activated materials into fine particles and add them into the ingredients for mixing; Tableting and granulation module, used to process the mixed materials into tablets or granules; The packaging module is used to pack, seal and label the finished products.

[0029] Please refer to the attached Figure 2 -Attached Fig.11 As an implementation method of the present invention, the present application also provides a corncob-based edible activated carbon production device, comprising: Please refer to the attached Figure 2 -Attached Figure 5 , drying and cracking combined furnace, which performs high-temperature dry distillation and cracking treatment on the corn cobs crushed by the crushing module; The drying and cracking combined furnace includes a drying kiln 1 and a cracking and distilling furnace 5. The drying kiln 1 is located at the upper part of the cracking and distilling furnace 5. The heating section of the outer shell of the cracking and distilling furnace 5 is designed in the middle of the furnace body. The temperature range of this area is 400℃~700℃, which is used to realize the cracking and gasification reaction of corn cobs. A discharge port 4 is installed at the bottom of the drying kiln 1. The top of the cracking and distilling furnace 5 is connected to the discharge port 4 through a flexible connection. The flexible connection is made of high temperature resistant and anti-expansion material. The flexible connection material is preferably ceramic fiber cloth. It is used to maintain the airtightness between the drying kiln 1 and the cracking and distilling furnace 5 during the thermal expansion displacement process. The material enters the distillation stage at 300℃~400℃, and the cracking reaction is completed under the temperature conditions of 400℃~700℃. The volatile atmosphere produced by cracking and gasification expands to the negative pressure area at both ends of the furnace cavity in a positive pressure state. The drying kiln 1 and the cracking and distilling furnace 5 are connected by a plurality of U-shaped support plates 8, preferably four U-shaped support plates 8, which are welded to the upper part of the shell of the cracking and distilling furnace 5, and the shell of the drying kiln 1 falls on the U-shaped support plates 8 without welding. A support 9 is installed at the bottom of the cracking and distilling furnace 5, and support is provided by the support 9. A box body 10 is installed on the outside of the drying kiln 1, and the cracking and retorting furnace 5 is installed inside the box body 10. An insulation layer and a protective layer are provided on the outside of the box body 10. A frequency conversion motor 3 is installed on the outside of the drying kiln 1, and an auger blade 2 is connected to the output end of the frequency conversion motor 3. A frequency conversion motor 26 is installed on the outside of the cracking and retorting furnace 5, and a group of auger blades 22 are installed on the output end of the frequency conversion motor 26. A plurality of groups of burners 11 are provided at the bottom of the cracking and retorting furnace 5, and the burners 11 are connected through a natural gas pipeline 12. Preferably, three groups of burners 11 are provided at the lower part of the cracking and retorting furnace 5 in the box body 10. The burners 11 are distributed on both sides with the center of the length of the cracking and retorting furnace 5. The distance between the burners 11 is 30 cm. The burner 11 is connected to a natural gas pipeline 12 from the outside, and the heat source comes from external natural gas.

[0030] The volume of the drying kiln 1 is twice that of the pyrolysis and distillation furnace 5, which is used to extend the residence time of the material. The reaction rate of biomass pyrolysis and distillation into biochar depends on the dryness of the biomass. The higher the dryness of the biomass, the higher the reaction efficiency of the biomass into biochar in the pyrolysis and distillation furnace 5 and the greater the yield. Secondly, the drying of the corn cob is affected by the characteristics of its structure. The corn cob consists of three parts: the epidermis, the medulla and the center layer, and the three layers have different physical structural characteristics. The epidermis and the medulla are tightly structured and hard, with a large thermal conductivity; while the center layer is fluffy and has a sponge structure with a low thermal conductivity, so it is difficult to achieve uniform dryness on the same rising temperature curve. The larger volume can increase the heating surface to fully receive the waste heat from the lower pyrolysis and distillation furnace 5. At the same time, the material in the cavity of the drying kiln 1 can not only increase the residence time, but also the larger cavity helps the material to be fully turned over and the water vapor evaporated. The middle of the drying kiln 1 is connected with a main pipeline 14, and the middle of the cracking and retorting furnace 5 is connected with a branch pipe 15. The branch pipe 15 and the main pipeline 14 are connected to the external induced draft fan through the induced draft fan connecting pipe 13. To maintain the slightly negative pressure state in the cavity. Two groups of branch pipes 15 connected to the induced draft fan are provided at both ends of the cracking and retorting furnace 5. The structure of the branch pipe 15 is in the shape of a "mouth". The branch pipe 15 is provided with an insulation layer and an insulation protection layer. The volatile atmosphere generated by cracking and gasification is discharged through the induced draft fan; the length of the branch pipe 15 is slightly larger than the width of the box 10. The branch pipe 15 and the main pipeline 14 are connected by flanges. The purpose is that the tar substances generated by the biomass during the cracking and gasification process are easy to condense on the pipeline wall. After a period of production, the branch pipe 15 needs to be replaced or cleaned to ensure that the branch pipe 15 is unobstructed. The branch pipe 15 is provided with a temperature sensor and a pressure transmitter. The purpose is to sense the state of corn cob cracking and gasification in the cavity of the cracking and retorting furnace 5 through the temperature changes on the front and rear ends of the branch pipe 15 and the difference in the data at both ends and the reference pressure changes.

[0031] The chamber is kept in a slightly negative pressure state through the induced draft fan connecting pipe 13 and the external induced draft fan. A humidity sensor and a temperature sensor are provided in the discharge path of the volatile gas. The detection system adjusts the auger speed and the heat source supply in real time to optimize the drying and cracking process. Please refer to the attached Figure 7 -Attached Fig. 9 , low temperature activation furnace, which treats the carbonized material at low temperature to change its physical and chemical properties; The low-temperature activation furnace includes an outer cylinder 23 and an inner cylinder 24, which are sealed to form a combustion chamber. A support seat 25 is installed on the inner wall of the inner cylinder 24, and blind plates 26 are installed at both ends of the inner cylinder 24. The outer cylinder 23 is installed between the support seat 25 and the blind plate 26 by welding. A second induced draft fan connecting pipe 29 is installed on the top of the outer cylinder 23. The other end of the second induced draft fan connecting pipe 29 is connected to an external induced draft fan. A stainless steel wire filter 30 is installed in the middle of the second induced draft fan connecting pipe 29 to prevent the activated carbon inside the low-temperature activation furnace from being sucked out by the induced draft fan. A variable frequency motor 3 27 is installed on the outside of the inner cylinder 24. The output end of the variable frequency motor 3 27 passes through the side wall of the inner cylinder 24 and is fixedly installed with a group of auger blades 2 22. An electric butterfly valve 21 is installed at the bottom outlet of the inner cylinder 24.

[0032] Please refer to the attached Figure 2 , Attachment Figure 6 and attached Figure 7 , the metering tank is installed between the drying and cracking combined furnace and the low-temperature activation furnace, and is used to meter the activated carbon produced by the drying and cracking combined furnace, and at the same time, the activated carbon is buffered through the metering tank; A discharge port 7 is provided at the bottom of the cracking and distillation furnace 5, the top of the metering tank is connected to the discharge port 7 through a connecting flange 16, a sight glass 17 is installed on the outer wall of the metering tank, a sampling port 18 is opened on the outer side of the metering tank, an electric butterfly valve 19 is installed at the bottom of the metering tank, and a cleaning hole 20 is opened in the middle of the metering tank.

[0033] The activated carbon is amorphous carbon made from corn cob biochar after activation. The electric butterfly valve 19 is started, and the frequency conversion motor 3 27 outside the low-temperature activation furnace is started at the same time. When the qualified biochar is put into the low-temperature activation furnace, a certain amount of oxidant and pore-opening agent are put in. The biochar entering the cavity of the low-temperature activation furnace moves to the other end outlet under the slow pull of the auger blade 22. It is also the process of biochar being activated in the presence of oxidant, pore-opening agent and at an ambient temperature of 450-600℃. The activated activated carbon enters the high-speed crushing device through the electric butterfly valve 21. The function of the electric butterfly valve 21 is not only to control the discharge and discharge of materials, but also to form a closed space for the internal cavity of the activation furnace, providing conditions for the distilled water and hydrogen peroxide to decompose water and expand under heat to generate pressure.

[0034] The oxidant used is preferably hydrogen peroxide. The advantage of using hydrogen peroxide is that hydrogen peroxide and materials decompose into oxygen and water during the oxidation process. The pore opening agent is preferably distilled water in a ratio with hydrogen peroxide. Before the temperature reaches 450°C, the frequency conversion motor 27 repeatedly rotates forward and reverse at a speed of 15r / min. When the temperature display shows 600°C to 700°C and the pressure display is greater than 49Kpa to 55Kpa, the induced draft fan is started to discharge the gas in the furnace chamber.

[0035] A plurality of burner groups 2 31 are installed at the bottom of the inner cylinder 24, and the plurality of burner groups 2 31 are connected to external natural gas through natural gas pipelines 2 32. The burner 2 31 is arranged in the middle section of the low-temperature activation furnace. The burner 2 31 is a customized fire grate, which is equally divided from the center of the low-temperature activation furnace to both sides, and the total length is close to 1 / 3 of the total length of the furnace body. The heat source of the burner comes from external natural gas. A plurality of small holes are opened at the top of the inner cylinder 24, and pressure sensors 34 and temperature sensors 35 are installed in the small holes. A plurality of legs 33 are installed at the bottom of the outer cylinder 23. A small hole with a diameter of 1 cm is opened at the top of the inner cylinder 24, and pressure sensors 34 and temperature sensors 35 are installed in the small hole to sense the reaction temperature and pressure inside the activation furnace, so as to understand the cavity temperature and adjust the speed of the variable frequency motor 3 27.

[0036] The middle part of the auger blade 22 is evenly distributed with multiple circular holes, one at every 60° intervals, for increasing the flow of volatile gas in the cavity. The diameter of the circular hole in the middle of the auger blade 22 located inside the cracking and distillation furnace 5 is half of the shaft diameter of the auger blade 22.

[0037] Please refer to the attached Fig.10 -Attached Figure 7 , high-speed crushing device, ultra-fine crushing of activated carbon. The specific gravity of activated carbon is between 0.45 and 0.65, and the Mohs hardness is only between 1 and 3. Because of its porous structure, its texture is loose. At present, most crushing devices in China, except for air flow mills, crush activated carbon based on the principle of rolling. The activated carbon crushed by this method has a single particle state at the microscopic level, which affects the quality of the activated carbon.

[0038] The high-speed crushing device includes a high-speed crushing kettle 41, a feed port 53 for feeding is provided on the top of the high-speed crushing kettle 41, a variable frequency motor 436 is installed on the top of the high-speed crushing kettle 41, the bottom of the variable frequency motor 436 penetrates the upper side wall of the high-speed crushing kettle 41 and is fixedly connected with a blade 37 through a rotating shaft, corn cob biochar is gradually injected into the crushing kettle from the feed port 53, the variable frequency motor 436 is started, and the speed is set at 400r / min. When the material is completely dropped, the speed of the variable frequency motor 436 is gradually increased to 4000r / min-5000r / min, and then the three groups of blades 37 arranged at the bottom of the high-speed crushing kettle 41 crush the activated carbon, and the crushing time is within 20min; after 20min of high-speed crushing, the speed is adjusted to 100r / min-120r / min. A bearing seat 48 is installed at the bottom of the high-speed crushing kettle 41, and the rotating shaft rotates in the middle of the bearing seat 48. The rotating shaft is positioned through the bearing seat 48, and it is convenient for oiling, cooling, maintenance and replacement. The bottom outlet of the high-speed crushing kettle 41 is equipped with an electric butterfly valve 3 49, a flange plate 46 is fixedly connected inside the high-speed crushing kettle 41, and a plurality of mesh holes 47 are opened in the middle of the flange plate 46. A mesh fence 42 is also installed inside the high-speed crushing kettle 41, and the mesh fence 42 is welded to the top of the flange plate 46. A screen 43, a fixed mesh 1 44 and a fixed mesh 2 45 are installed in the middle of the mesh fence 42. The mesh number of the screen 43 is 300 meshes, the fixed mesh 1 44 adopts a 1×1 fixed mesh, and the fixed mesh 2 45 adopts a 2×2 fixed mesh. The screen 43, the fixed mesh 1 44 and the fixed mesh 2 45 are arranged in the shape of a "mesh". The diameters of the mesh fence 42 and the bottom flange plate 46 of the mesh fence 42 are both 20 cm smaller than the inner wall of the high-speed crushing kettle 41. The mesh fence 42 is welded to the bottom flange plate 46. The flange plate 46 has four mesh holes 47. The purpose is: because the 300-mesh screen is too soft, a 1×1 mesh is used in the inner layer and a 2×2 mesh is used in the outer layer to enable it to stand firmly.

[0039] Please refer to the attached Fig.10 The top of the high-speed crushing kettle 41 is equipped with an atomizing nozzle 39, and the middle section of the atomizing nozzle 39 is equipped with a liquid material tank 38 through a control valve. The other end of the atomizing nozzle 39 is connected to an external gas source, and the atomizing nozzle 39 is connected to an external air compressor hose. The liquid prepared in the liquid material tank 38 is sprayed into the high-speed crushing kettle 41 through the air compressor. The process of spraying and mixing the activated carbon in the high-speed crushing kettle 41 is also the process of dust reduction for the activated carbon in the kettle. A cleaning hole 2 50 is provided at the bottom of the high-speed crushing kettle 41. The cleaning hole 2 50 is in a blocked state under normal conditions for cleaning or maintenance. A sight glass 2 40, a pressure gauge 51 and a temperature gauge 52 are installed on the top of the high-speed crushing kettle 41. During the mixing and mixing process, the mixing process can be observed through the sight glass 2 40 located on the upper part. After the mixing in the kettle is completed, the electric butterfly valve 3 49 is started to put the mixed materials into the metering tank. The metering tank can be connected to the feeding port of 2 to 3 tablet making machines through a hose. The tablet making machines are purchased as standard equipment and will not be described in detail here.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corncob-based edible activated carbon production system, characterized in that: include, A crushing module, used to crush the corn cob raw materials into small particles or powder; A continuous dry distillation and cracking module is used to perform high-temperature dry distillation and cracking treatment on the corn cobs crushed by the crushing module; Low temperature activation furnace module, used for low temperature treatment of carbonized materials to change physical and chemical properties; A crushing and batching module is used to crush the activated materials into fine particles and add them into the ingredients for mixing; Tableting and granulation module, used to process the mixed materials into tablets or granules; The packaging module is used to pack, seal and label the finished products.

2. A corncob-based edible activated carbon production device, characterized in that: The corncob-based edible activated carbon production system as claimed in claim 1, include, The drying and cracking combined furnace performs high-temperature dry distillation and cracking treatment on the corn cobs crushed by the crushing module; Low temperature activation furnace, which treats carbonized materials at low temperature to change their physical and chemical properties; The metering tank is installed between the drying and cracking combined furnace and the low-temperature activation furnace to measure the activated carbon produced by the drying and cracking combined furnace and to cache the activated carbon through the metering tank; High-speed crushing device to ultra-finely crush the activated carbon.

3. The corncob-based edible activated carbon production device according to claim 2, characterized in that: The drying and cracking combined furnace comprises a drying kiln (1) and a cracking and distilling furnace (5); the drying kiln (1) is located at the upper part of the cracking and distilling furnace (5); a discharge port (4) is installed at the bottom of the drying kiln (1); the top of the cracking and distilling furnace (5) is connected to the discharge port (4) via a flexible connection; the drying kiln (1) and the cracking and distilling furnace (5) are connected via a plurality of U-shaped support plates (8); a support (9) is installed at the bottom of the cracking and distilling furnace (5); a box (10) is installed outside the drying kiln (1); The cracking and retorting furnace (5) is installed inside the housing (10); a variable frequency motor (3) is installed outside the drying kiln (1); an output end of the variable frequency motor (3) is connected to an auger blade (2); a variable frequency motor (6) is installed outside the cracking and retorting furnace (5); a group of auger blades (22) are installed at the output end of the variable frequency motor (6); and a plurality of groups of burners (11) are provided at the bottom of the cracking and retorting furnace (5); the burners (11) are connected via a natural gas pipeline (12).

4. The corncob-based edible activated carbon production device according to claim 3, characterized in that: The volume of the drying kiln (1) is twice that of the cracking and retorting furnace (5) and is used to prolong the residence time of the materials. The middle of the drying kiln (1) is connected to a main pipeline (14), and the middle of the cracking and retorting furnace (5) is connected to a branch pipe (15). Both the branch pipe (15) and the main pipeline (14) are connected to an external induced draft fan via an induced draft fan connecting pipe 1 (13).

5. The corncob-based edible activated carbon production device according to claim 3, characterized in that: A discharge port (7) is provided at the bottom of the cracking and retorting furnace (5); the top of the metering tank is connected to the discharge port (7) via a connecting flange (16); a sight glass (17) is installed on the outer wall of the metering tank; a sampling port (18) is provided on the outer side of the metering tank; an electric butterfly valve (19) is installed at the bottom of the metering tank; and a cleaning hole (20) is provided in the middle of the metering tank.

6. The corncob-based edible activated carbon production device according to claim 3, characterized in that: The low-temperature activation furnace comprises an outer cylinder (23) and an inner cylinder (24), wherein the outer cylinder (23) and the inner cylinder (24) are sealed to form a combustion chamber, a support seat (25) is installed on the inner wall of the inner cylinder (24), blind plates (26) are installed at both ends of the inner cylinder (24), the outer cylinder (23) is installed between the support seat (25) and the blind plate (26) by welding, a second induced draft fan connecting pipe (29) is installed on the top of the outer cylinder (23), the other end of the second induced draft fan connecting pipe (29) is connected to an external induced draft fan, a stainless steel wire filter (30) is installed in the middle of the second induced draft fan connecting pipe (29), a third variable frequency motor (27) is installed on the outer side of the inner cylinder (24), the output end of the third variable frequency motor (27) passes through the side wall of the inner cylinder (24) and is fixedly installed with a group of second auger blades (22), and an electric butterfly valve (21) is installed at the bottom outlet of the inner cylinder (24).

7. The corncob-based edible activated carbon production device according to claim 6, characterized in that: A plurality of groups of burner 2 (31) are installed at the bottom of the inner cylinder (24), and the plurality of groups of burner 2 (31) are connected to external natural gas via natural gas pipeline 2 (32). A plurality of small holes are opened at the top of the inner cylinder (24), and pressure sensors (34) and temperature sensors (35) are installed in the small holes. A plurality of groups of legs (33) are installed at the bottom of the outer cylinder (23).

8. The corncob-based edible activated carbon production device according to claim 3, characterized in that: The middle part of the auger blade 2 (22) is provided with a plurality of circular holes evenly distributed at an angle, and is located in the auger blade 2 (22) inside the cracking and retorting furnace (5), wherein the diameter of the circular hole opened in the middle part is half of the shaft diameter of the auger blade 2 (22).

9. The corncob-based edible activated carbon production device according to claim 2, characterized in that: The high-speed pulverizing device comprises a high-speed pulverizing kettle (41), a variable frequency motor four (36) is installed on the top of the high-speed pulverizing kettle (41), the bottom of the variable frequency motor four (36) penetrates the upper side wall of the high-speed pulverizing kettle (41) and is fixedly connected to a blade (37) via a rotating shaft, a bearing seat (48) is installed at the bottom of the high-speed pulverizing kettle (41), the rotating shaft rotates in the middle of the bearing seat (48), an electric butterfly valve three (49) is installed at the bottom outlet of the high-speed pulverizing kettle (41), and the high-speed A flange plate (46) is fixedly connected to the inside of the pulverizing kettle (41), and a plurality of mesh holes (47) are opened in the middle of the flange plate (46). A mesh fence (42) is also installed in the inside of the high-speed pulverizing kettle (41), and the mesh fence (42) is welded to the top of the flange plate (46). A screen (43), a fixed mesh 1 (44) and a fixed mesh 2 (45) are installed in the middle of the mesh fence (42), and the screen (43), the fixed mesh 1 (44) and the fixed mesh 2 (45) are arranged in a "mesh" shape.

10. The corncob-based edible activated carbon production device according to claim 9, characterized in that: The top of the high-speed pulverizing kettle (41) is equipped with an atomizing nozzle (39), the middle section of the atomizing nozzle (39) is equipped with a liquid material tank (38) via a control valve, the other end of the atomizing nozzle (39) is connected to an external gas source, a second cleaning hole (50) is provided at the bottom of the high-speed pulverizing kettle (41), a second sight glass (40), a pressure gauge (51) and a temperature gauge (52) are installed at the top of the high-speed pulverizing kettle (41), and a feeding port (53) for feeding is provided at the top of the high-speed pulverizing kettle (41).

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