CN116409787A - Biochar activation forming device and method - Google Patents
Biochar activation forming device and method Download PDFInfo
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- CN116409787A CN116409787A CN202310406536.2A CN202310406536A CN116409787A CN 116409787 A CN116409787 A CN 116409787A CN 202310406536 A CN202310406536 A CN 202310406536A CN 116409787 A CN116409787 A CN 116409787A
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- 230000004913 activation Effects 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 47
- 238000002156 mixing Methods 0.000 claims abstract description 46
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000011230 binding agent Substances 0.000 claims abstract description 28
- 238000000465 moulding Methods 0.000 claims abstract description 28
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000003756 stirring Methods 0.000 claims abstract description 19
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 10
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 10
- 238000001125 extrusion Methods 0.000 claims abstract description 6
- 238000004064 recycling Methods 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 40
- 238000010438 heat treatment Methods 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 13
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 9
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 6
- 239000005751 Copper oxide Substances 0.000 claims description 6
- 229910000431 copper oxide Inorganic materials 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000013019 agitation Methods 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000010354 integration Effects 0.000 abstract 1
- 230000003213 activating effect Effects 0.000 description 7
- 125000004122 cyclic group Chemical group 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/39—Apparatus for the preparation thereof
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/354—After-treatment
- C01B32/384—Granulation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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Abstract
The invention belongs to the technical field of activated forming of biochar, and discloses a activated forming device and method of biochar. The activated charcoal forming method of the invention comprises the following steps: fully mixing and stirring the biochar and the binder, performing activation treatment on the molded biochar in a carbon dioxide atmosphere and a high-temperature environment after extrusion molding, cooling and storing the activated molded biochar, and recycling the gas generated by activation after tail gas treatment. The invention has the advantages of uniform mixing, environmental protection, no pollution, integration of activation and molding, and continuous activation and molding of biochar.
Description
Technical Field
The invention belongs to the technical field of activated formation of biochar, and particularly relates to an activated formation device and method of biochar.
Background
The biochar is a solid material obtained by thermochemical conversion of biomass in an anoxic environment, has the advantages of low cost, reproducibility, simple preparation process, low energy consumption, environmental friendliness and the like, and has great application potential in the fields of adsorption, catalysis and the like. In order to obtain a molded activated carbon having a high specific surface area, the activated carbon needs to be subjected to an activation and molding treatment.
The method for activating the biochar mainly comprises an acid activation method, an alkali activation method, a gas activation method and the like, wherein the carbon dioxide gas activation method has the advantages of low cost and the like, and is widely applied, and Chinese patent applications CN200910105520.8, CN201410514002.2, CN201620912756.8 and the like adopt the method. However, the tail gas activated by the carbon dioxide activation method contains a large amount of poisonous and harmful carbon monoxide gas, and the direct discharge can cause the problems of environmental pollution and the like.
The forming process of the activated carbon mainly comprises direct activation of a carbonaceous precursor, artificial synthesis of the precursor, powder activated carbon bonding forming and the like, and the powder activated carbon bonding forming has high compressive strength, good adsorption performance and huge development potential, and the process is adopted in Chinese patent applications CN202011041098.7, CN202122356352.9 and the like. The uniform mixing of the powdered activated carbon and the binder is the key of the forming process, and the conventional mixing device has the problems of uneven mixing and the like, so that the formed activated carbon has poor mechanical properties.
In addition, the activation device and the forming device for forming the activated carbon are usually separated, so that not only can certain energy waste be caused, but also the production efficiency is lower.
Disclosure of Invention
The invention aims to provide a biochar activation forming device and method, which can realize the activation and forming of biochar integrally, and are environment-friendly, pollution-free, uniform in mixing and high in efficiency.
The technical scheme adopted by the invention is that the device and the method for activating and forming the biochar comprise a stirring and feeding system, a forming system and an activating system, wherein the stirring and feeding system comprises a rotatable rotary mixer and a spiral mixing and feeding device, an outlet of the rotary mixer is communicated with an inlet of the spiral mixing and feeding device, an outlet of the spiral mixing and feeding device is connected with the forming system, and the forming system is connected with the activating system; the molding system comprises a valve for controlling the connection and disconnection of the molding system and the activation system; the activation system comprises an exhaust gas treatment device which is used for treating harmful gas generated by the activation system.
Preferably, the stirring feeding system further comprises a biochar hopper and a binder hopper, wherein the outlets of the biochar hopper and the binder hopper are connected with the material inlet of the rotary mixer.
Preferably, the molding system further comprises an extruder and a molding die, wherein the extruder corresponds to the molding die in position, and the molding die is positioned on one side of the valve.
Preferably, the valve is a rotary valve, the rotary valve comprises a rotary table and a rotary shaft penetrating through the center of the rotary table, and an opening is formed in the rotary table.
Preferably, the activation system further comprises a heating furnace, a conveyor belt, an air inlet, an air outlet and a gas circulation pump; the conveyor belt is arranged in the heating furnace, and the starting end of the conveyor belt is positioned at one side of the valve; the air inlet is connected with the heating furnace, the air outlet is connected with the tail gas treatment device, the heating furnace, the air inlet and the air outlet are internally communicated, and the air outlet is connected with the air inlet through the gas circulating pump.
Preferably, the rotary mixer consists of long blades and short blades, the length of the long blades is 2 times that of the short blades, the widths of the long blades and the short blades are 10-20 mm, and the blade spacing is 20-30 mm; the screw pitch of the spiral mixing and feeding device is 60-120 mm, and the radius is 50-200 mm; the distance between the spiral blade and the inner wall is less than 0.5mm.
Preferably, the cooling storage system further comprises a water inlet, a water outlet and a cooling storage chamber, wherein the water inlet is arranged at the lower end of the cooling storage system, the water outlet is arranged at the upper end of the cooling storage system, and the cooling storage chamber is arranged below the forming system.
Preferably, the rotating speed of the rotary mixer is 50-300 r/min, the rotating speed of the spiral mixing feeding device is 5-10 r/min, and the rotating speed of the valve is 1-5 r/min; the conveying speed of the conveying belt is 100-300 mm/min.
The invention also provides a biochar activation molding method, which comprises the following steps: fully mixing and stirring the biochar and the binder, performing activation treatment on the molded biochar in a carbon dioxide atmosphere and a high-temperature environment after extrusion molding, cooling and storing the activated molded biochar, and recycling the gas generated by activation after tail gas treatment.
Preferably, the temperature of the activation treatment is 800-900 ℃, and copper oxide and/or iron oxide is used in the tail gas treatment.
The invention has the beneficial effects that:
(1) The activation molding efficiency is high: the activation device and the forming device are integrated, activation and forming can be continuously carried out, and production efficiency is improved.
(2) The molding effect is good: the rotary mixer and the spiral mixing and feeding device ensure that the biochar and the binder are uniformly mixed, so that the molding effect is enhanced.
(3) There are additional products: and (3) treating the activated tail gas to reduce copper oxide and/or iron oxide to obtain copper and/or iron.
(4) And (3) recycling an activating agent: the tail gas can be recycled after being treated, and has no carbon monoxide and carbon dioxide emission, environmental protection and no pollution.
Drawings
FIG. 1 is a schematic view of a biochar activation molding apparatus according to the present invention;
fig. 2 is a schematic view of a rotary valve according to the present invention.
Wherein:
1-a mixing system; 11-a biochar hopper; 12-an adhesive hopper; 13-rotating the mixer; 14-a spiral material mixing and feeding device;
2-an activation system; 21-an extruder; 22-a forming die; 23-rotating a valve; 231-a rotation axis; 232-a turntable;
3-an activation system; 31-a heating furnace; 32-a conveyor belt; 33-an exhaust gas treatment device; 34-air inlet; 35-an air outlet; 36-a gas circulation pump;
4-a cooling storage system; 41-water inlet; 42-water outlet; 43-cooling the storage chamber.
Detailed Description
The following is a further detailed description of the embodiments:
in order to achieve the above technical solution, fig. 1 shows a biochar activating and forming device according to an embodiment of the present invention, which includes a stirring and feeding system 1, a forming system 2, an activating system 3, and a cooling and storing system 4. Wherein the stirring and feeding system 1 comprises a biochar hopper 11, a binder hopper 12, a rotary mixer 13 and a spiral mixing and feeding device 14; the forming system 2 comprises an extruder 21, a forming die 22 and a valve, the extruder 21 corresponds to the forming die 22 in position, the forming die 22 is positioned at the valve, the valve in the embodiment adopts a rotary valve 23, the rotary valve 23 comprises a rotary shaft 231 and a rotary disc 232, the rotary shaft 231 is fixedly arranged at the center of the rotary disc 232 in a penetrating way, as shown in fig. 2, an opening is arranged on the rotary disc 232, and the connection and disconnection of the forming system 2 and the activation system 3 can be controlled; the activation device 3 comprises a heating furnace 31, a conveyor belt 32 and a tail gas treatment device 33, and is provided with an air inlet 34, an air outlet 35 and a gas circulation pump 36; the cooling storage system 4 is provided with a water inlet 41, a water outlet 42 and a cooling storage chamber 43.
The outlets of the biochar hopper 11 and the binder hopper 12 are connected with a material inlet above the rotary mixer 13; the inlet on the right side of the spiral material mixing and feeding device 14 is connected with the outlet below the side of the rotary mixer 13; the outlet at the left side of the spiral material mixing and feeding device 14 is connected with the inlet above the forming system 2; the right outlet of the forming system 2 is connected with the left inlet of the activation system 3; the conveyor belt 32 is inside the heating furnace 31; the right side outlet of the activation system 3 is connected with the upper side inlet of the cooling storage system 4; the air inlet 34 is arranged on the right upper side of the activation system 3, the air outlet 35 is arranged on the left lower side of the activation system 3, and the air outlet 35 is connected with the air inlet 34 through the air circulation pump 36; the water inlet 41 is positioned at the left lower side of the cooling storage system 4, and the water outlet 42 is positioned at the right upper side of the cooling storage system 4.
A rotary mixer 13 is arranged in the cavity of the biochar hopper 11, the rotary mixer 13 consists of long blades and short blades, and the length of the long blades is 2 times that of the short blades; the width of the long blade and the short blade is 10-20 mm, and the blade spacing is 20-30 mm.
The screw pitch of the spiral material mixing and feeding device 14 is 60-120 mm, and the radius is 50-200 mm; the distance between the spiral blade and the inner wall is less than 0.5mm.
The invention also provides a method for activated forming of the biochar, which comprises the following steps:
the biochar and the binder are respectively put into a rotary mixer 13 from a biochar hopper 11 and a binder hopper 12; introducing carbon dioxide gas from the gas inlet 34 to exhaust air in the device; the biochar and the binder enter a spiral mixing and feeding device 14 to be stirred again after being stirred by a rotary mixer 13 and are conveyed to a molding system 2; the extruder 21 and the molding die 22 extrude the raw materials to obtain molded biochar; the molded biochar enters a conveyor belt 32 in a heating furnace 31 to be activated through a rotary valve 23; the activated formed biochar enters a cooling storage chamber 43 of a cooling storage system 4 for cooling storage; the activated gas is treated by the tail gas treatment device 33 and then enters the gas circulation pump 36 through the gas outlet 35 for cyclic utilization.
In the steps, the biochar is powdery biochar, and the particle size is smaller than 2mm;
the rotating speed of the rotary mixer is 50-300 r/min, the rotating speed of the spiral mixing feeding device is 5-10 r/min, and the rotating speed of the rotary valve is 1-5 r/min; the conveying speed of the conveying belt is 100-300 mm/min;
the activation temperature in the heating furnace is 800-900 ℃;
copper oxide and/or iron oxide are placed in the tail gas treatment device.
Example 1
A biochar activation forming device, as shown in figures 1 and 2, comprises a stirring feeding system 1, a forming system 2, an activation system 3 and a cooling storage system 4. Wherein the stirring and feeding system 1 comprises a biochar hopper 11, a binder hopper 12, a rotary mixer 13 and a spiral mixing and feeding device 14; the molding system 2 includes an extruder 21, a molding die 22, and a rotary valve 23; the rotary valve 23 includes a rotary shaft 231 and a rotary table 232; the activation device 3 comprises a heating furnace 31, a conveyor belt 32, a tail gas treatment device 33, a gas inlet 34, a gas outlet 35 and a gas circulation pump 36; the cooling storage system 4 is provided with a water inlet 41, a water outlet 42, and a cooling storage chamber 43.
The outlets of the biochar hopper 11 and the binder hopper 12 are connected with a material inlet above the rotary mixer 13, the length of long blades of the rotary mixer is 200mm, the length of short blades is 100mm, the width of the blades is 10mm, and the distance between the blades is 20mm; the inlet on the right side of the spiral mixing and feeding device 14 is connected with the outlet below the rotary mixer 13, the pitch of the spiral mixing and feeding device is 60mm, the radius is 50mm, and the distance between the spiral blades and the inner wall is less than 0.5mm; the outlet at the left side of the spiral material mixing and feeding device 14 is connected with the inlet above the forming system 2; the right outlet of the forming system 2 is connected with the left inlet of the activation system 3; the conveyor belt 32 is arranged inside the heating furnace 31 and is positioned at the other side of the rotary valve 23, the length of the conveyor belt is 2000mm, and the width of the conveyor belt is 100mm; the right side outlet of the activation system 3 is connected with the upper side inlet of the cooling storage system 4; the air inlet 34 is arranged on the right upper side of the activation system 3, the air outlet 35 is arranged on the left lower side of the activation system 3, and the air outlet 35 is connected with the air inlet 34 through the air circulation pump 36; the water inlet 41 is positioned at the left lower side of the cooling storage system 4, and the water outlet 42 is positioned at the right upper side of the cooling storage system 4.
The powdered biochar and the binder are respectively put into a mixer from a biochar hopper and a binder hopper, and the particle size of the biochar is smaller than 2mm; introducing carbon dioxide gas from the air inlet, and exhausting air in the device; the biochar and the binder enter a spiral mixing and feeding device for stirring again after being stirred by a mixer, and are conveyed to an extrusion molding device for molding, wherein the rotating speed of the rotating mixer is 50r/min, and the rotating speed of the spiral mixing and feeding device is 5r/min; the molded biochar enters a heating furnace through a rotary valve to be activated by a conveyor belt, and the activation temperature in the heating furnace isThe rotating speed of the rotary valve is 1r/min at 800 ℃, and the conveying speed of the conveying belt is 100mm/min; the activated formed biochar enters a cooling storage system for cooling and storing; the tail gas treatment device is provided with a sufficient amount of copper oxide, and the activated gas is treated by the tail gas treatment device and then enters a gas circulation pump through a gas outlet for cyclic utilization. To prepare the cylindrical formed active carbon with the specific surface area of 738m 2 /g。
Example 2
A biochar activation forming device, as shown in figures 1 and 2, comprises a stirring feeding system 1, a forming system 2, an activation system 3 and a cooling storage system 4. Wherein, the stirring and feeding system 1 comprises a biochar hopper 11, a binder hopper 12, a rotary mixer 13 and a spiral mixing and feeding device 14; the molding system 2 includes an extruder 21, a molding die 22, and a rotary valve 23; the rotary valve 23 includes a rotary shaft 231 and a rotary plate 232; the activation device 3 comprises a heating furnace 31, a conveyor belt 32, a tail gas treatment device 33, a gas inlet 34, a gas outlet 35 and a gas circulation pump 36; the cooling storage system 4 is provided with a water inlet 41, a water outlet 42, and a cooling storage chamber 43.
The outlets of the biochar hopper 11 and the binder hopper 12 are connected with a material inlet above the rotary mixer 13, the length of long blades of the rotary mixer is 300mm, the length of short blades is 150mm, the width of the blades is 20mm, and the distance between the blades is 30mm; the inlet on the right side of the spiral mixing and feeding device 14 is connected with the outlet below the rotary mixer 13, the pitch of the spiral mixing and feeding device is 120mm, the radius is 200mm, and the distance between the spiral blades and the inner wall is less than 0.5mm; the outlet at the left side of the spiral material mixing and feeding device 14 is connected with the inlet above the forming system 2; the right outlet of the forming system 2 is connected with the left inlet of the activation system 3; the conveyor belt 32 is arranged inside the heating furnace 31, the length of the conveyor belt is 6000mm, and the width of the conveyor belt is 200mm; the right side outlet of the activation system 3 is connected with the upper side inlet of the cooling storage system 4; the air inlet 34 is arranged on the right upper side of the activation system 3, the air outlet 35 is arranged on the left lower side of the activation system 3, and the air outlet 35 is connected with the air inlet 34 through the air circulation pump 36; the water inlet 41 is positioned at the left lower side of the cooling storage system 4, and the water outlet 42 is positioned at the right upper side of the cooling storage system 4.
The powdered biochar and the binder are respectively formed by a biochar hopper and the binderThe hopper is put into a mixer, and the grain diameter of the biochar is smaller than 2mm; introducing carbon dioxide gas from the air inlet, and exhausting air in the device; the biochar and the binder enter a spiral mixing and feeding device for stirring again after being stirred by a mixer, and are conveyed to an extrusion molding device for molding, wherein the rotating speed of the rotating mixer is 200r/min, and the rotating speed of the spiral mixing and feeding device is 10r/min; the molded biochar enters a conveyor belt in a heating furnace to be activated through a rotary valve, the activation temperature in the heating furnace is 900 ℃, the rotating speed of the rotary valve is 5r/min, and the conveying speed of the conveyor belt is 300mm/min; the activated formed biochar enters a cooling storage system for cooling and storing; the tail gas treatment device is provided with a sufficient amount of copper oxide, and the activated gas is treated by the tail gas treatment device and then enters a gas circulation pump through a gas outlet for cyclic utilization. To obtain cylindrical formed active carbon with specific surface area of 786m 2 /g。
Example 3
A biochar activation forming device, as shown in figures 1 and 2, comprises a stirring feeding system 1, a forming system 2, an activation system 3 and a cooling storage system 4. Wherein, the stirring and feeding system 1 comprises a biochar hopper 11, a binder hopper 12, a rotary mixer 13 and a spiral mixing and feeding device 14; the molding system 2 includes an extruder 21, a molding die 22, and a rotary valve 23; the rotary valve 23 includes a rotary shaft 231 and a rotary plate 232; the activation device 3 comprises a heating furnace 31, a conveyor belt 32, a tail gas treatment device 33, a gas inlet 34, a gas outlet 35 and a gas circulation pump 36; the cooling storage system 4 is provided with a water inlet 41, a water outlet 42, and a cooling storage chamber 43.
The outlets of the biochar hopper 11 and the binder hopper 12 are connected with a material inlet above the rotary mixer 13, the length of long blades of the rotary mixer is 250mm, the length of short blades is 125mm, the width of the blades is 15mm, and the distance between the blades is 25mm; the inlet on the right side of the spiral mixing and feeding device 14 is connected with the outlet below the rotary mixer 13, the pitch of the spiral mixing and feeding device is 90mm, the radius is 100mm, and the distance between the spiral blades and the inner wall is less than 0.5mm; the outlet at the left side of the spiral material mixing and feeding device 14 is connected with the inlet above the forming system 2; the right outlet of the forming system 2 is connected with the left inlet of the activation system 3; the conveyor belt 32 is arranged inside the heating furnace 31, the length of the conveyor belt is 3000mm, and the width of the conveyor belt is 100mm; the right side outlet of the activation system 3 is connected with the upper side inlet of the cooling storage system 4; the air inlet 34 is arranged on the right upper side of the activation system 3, the air outlet 35 is arranged on the left lower side of the activation system 3, and the air outlet 35 is connected with the air inlet 34 through the air circulation pump 36; the water inlet 41 is positioned at the left lower side of the cooling storage system 4, and the water outlet 42 is positioned at the right upper side of the cooling storage system 4.
The powdered biochar and the binder are respectively put into a mixer from a biochar hopper and a binder hopper, and the particle size of the biochar is smaller than 2mm; introducing carbon dioxide gas from the air inlet, and exhausting air in the device; the biochar and the binder enter a spiral mixing and feeding device for stirring again after being stirred by a mixer, and are conveyed to an extrusion molding device for molding, wherein the rotating speed of the rotating mixer is 100r/min, and the rotating speed of the spiral mixing and feeding device is 6r/min; the molded biochar enters a conveyor belt in a heating furnace to be activated through a rotary valve, the activation temperature in the heating furnace is 850 ℃, the rotating speed of the rotary valve is 3r/min, and the conveying speed of the conveyor belt is 200mm/min; the activated formed biochar enters a cooling storage system for cooling and storing; and a sufficient amount of ferric oxide is placed in the tail gas treatment device, and the activated gas is treated by the tail gas treatment device and then enters a gas circulation pump through a gas outlet for cyclic utilization. To obtain cylindrical shaped active carbon with specific surface area 744m 2 /g。
In the description of the present invention, the azimuth or positional relationship indicated by the terms "upper", "lower", "left", "right", etc., are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and should not be construed as limiting the present invention; unless specifically stated and limited otherwise, the terms "connected," "connected," and the like are to be construed broadly and include, for example, either permanently connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Common knowledge of the specific construction and characteristics of the embodiments of the invention described above will not be described in any more detail.
Claims (10)
1. The biochar activation forming device is characterized by comprising a stirring feeding system, a forming system and an activation system, wherein the stirring feeding system comprises a rotatable rotary mixer and a spiral mixing feeding device, an outlet of the rotary mixer is communicated with an inlet of the spiral mixing feeding device, an outlet of the spiral mixing feeding device is connected with the forming system, and the forming system is connected with the activation system; the molding system comprises a valve for controlling the connection and disconnection of the molding system and the activation system; the activation system comprises an exhaust gas treatment device which is used for treating harmful gas generated by the activation system.
2. The activated carbon molding device of claim 1, wherein the agitation feed system further comprises a carbon hopper and a binder hopper, an outlet of the carbon hopper and the binder hopper being connected to a material inlet of the rotary mixer.
3. The activated charcoal forming apparatus according to claim 1, wherein the forming system further comprises an extruder, a forming die, the extruder corresponding to the forming die position, the forming die being located on one side of the valve.
4. The activated charcoal forming device according to claim 1, wherein the valve is a rotary valve, the rotary valve comprises a rotary disc and a rotary shaft penetrating through the center of the rotary disc, and an opening is formed in the rotary disc.
5. The activated charcoal forming apparatus according to claim 3, wherein the activation system further comprises a heating furnace, a conveyor belt, an air inlet, an air outlet, and a gas circulation pump; the conveyor belt is arranged in the heating furnace, and the starting end of the conveyor belt is positioned at one side of the valve; the air inlet is connected with the heating furnace, the air outlet is connected with the tail gas treatment device, the heating furnace, the air inlet and the air outlet are internally communicated, and the air outlet is connected with the air inlet through the gas circulating pump.
6. The activated biochar forming device according to claim 1, wherein the rotary mixer consists of long blades and short blades, the length of the long blades is 2 times that of the short blades, the width of the long blades and the short blades are 10-20 mm, and the blade spacing is 20-30 mm; the screw pitch of the spiral mixing and feeding device is 60-120 mm, and the radius is 50-200 mm; the distance between the spiral blade and the inner wall of the spiral mixing and feeding device is smaller than 0.5mm.
7. The activated charcoal forming apparatus of claim 1, further comprising a cooling storage system comprising a water inlet at a lower end of the cooling storage system, a water outlet at an upper end of the cooling storage system, and a cooling storage chamber disposed below the forming system.
8. The activated biochar forming device according to claim 5, wherein the rotating mixer has a rotating speed of 50-300 r/min, the spiral mixing feeding device has a rotating speed of 5-10 r/min, and the valve has a rotating speed of 1-5 r/min; the conveying speed of the conveying belt is 100-300 mm/min.
9. The activated biochar forming method is characterized by comprising the following steps of: fully mixing and stirring the biochar and the binder, performing activation treatment on the molded biochar in a carbon dioxide atmosphere and a high-temperature environment after extrusion molding, cooling and storing the activated molded biochar, and recycling the gas generated by activation after tail gas treatment.
10. The activated charcoal forming method according to claim 9, wherein the temperature of the activation treatment is 800-900 ℃, and copper oxide and/or iron oxide is used in the tail gas treatment.
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