CN116354346A - Wood granular activated carbon and preparation process thereof - Google Patents
Wood granular activated carbon and preparation process thereof Download PDFInfo
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- CN116354346A CN116354346A CN202310123258.XA CN202310123258A CN116354346A CN 116354346 A CN116354346 A CN 116354346A CN 202310123258 A CN202310123258 A CN 202310123258A CN 116354346 A CN116354346 A CN 116354346A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 228
- 239000002023 wood Substances 0.000 title claims abstract description 125
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000000843 powder Substances 0.000 claims abstract description 52
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000000853 adhesive Substances 0.000 claims abstract description 44
- 230000001070 adhesive effect Effects 0.000 claims abstract description 44
- 239000002245 particle Substances 0.000 claims abstract description 42
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 34
- 230000004913 activation Effects 0.000 claims abstract description 28
- 238000001994 activation Methods 0.000 claims abstract description 28
- 238000003756 stirring Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 17
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 16
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 16
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims abstract description 16
- 239000000440 bentonite Substances 0.000 claims abstract description 16
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 16
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 16
- 235000013305 food Nutrition 0.000 claims abstract description 9
- 238000003763 carbonization Methods 0.000 claims abstract description 8
- 238000011084 recovery Methods 0.000 claims abstract description 4
- 235000021268 hot food Nutrition 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 10
- 230000003213 activating effect Effects 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 238000010000 carbonizing Methods 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 6
- 239000011229 interlayer Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000010298 pulverizing process Methods 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- 238000007873 sieving Methods 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 239000011361 granulated particle Substances 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000009775 high-speed stirring Methods 0.000 claims description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 238000001179 sorption measurement Methods 0.000 abstract description 6
- 239000011148 porous material Substances 0.000 abstract description 5
- 238000004140 cleaning Methods 0.000 abstract description 3
- 238000004887 air purification Methods 0.000 abstract description 2
- 239000003245 coal Substances 0.000 description 11
- 235000013162 Cocos nucifera Nutrition 0.000 description 9
- 244000060011 Cocos nucifera Species 0.000 description 9
- 239000003054 catalyst Substances 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011280 coal tar Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- C01B32/336—Preparation characterised by gaseous activating agents
-
- 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
- C01B32/382—Making shaped products, e.g. fibres, spheres, membranes or foam
-
- 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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Carbon And Carbon Compounds (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention provides wood particle activated carbon and a preparation process thereof, and relates to the technical field of activated carbon for air purification. The wood granular activated carbon comprises the following main raw materials in parts by weight: 90-100 parts of wood powder active carbon, 20-25 parts of organic nano bentonite, 6-8 parts of adhesive, 0.5-0.9 part of curing agent, 2.5-4.5 parts of sodium bicarbonate, 9-13 parts of acrylic acid and 180-200 parts of water, and the wood powder active carbon is prepared by mixing, uniformly stirring, granulating and airing the above raw materials, and then performing physical activation, wherein the wood powder active carbon powder is prepared from aged wood chips and 85% of hot food grade phosphoric acid according to the wood chips: thermal food grade phosphoric acid = 1:1.2 to 1.5, and is prepared by fully stirring and standing, and then carrying out high-temperature carbonization and activation, recovery, rinsing, airing and powder preparation. In the invention, columnar or granular activated carbon prepared from wood activated carbon is selected, so that the activated carbon has large volume, developed pore structure, strong adsorption capacity and better effect of cleaning air, and the effective formaldehyde removal rate can reach more than 97%.
Description
Technical Field
The invention relates to the technical field of activated carbon for air purification, in particular to wood particle activated carbon and a preparation process thereof.
Background
At present, volatile combustible gas of VOCS in the indoor and in-car enclosed spaces is mainly formaldehyde, benzene, toluene, xylene and the like, and the injury to human bodies is gradually valued by people. Most of granular activated carbon in the market used in the field of air purifiers and the field of recovery and treatment of harmful gases and solvents adopts coal activated carbon and coconut activated carbon, a large amount of coal tar, asphalt and organic adhesive are adopted in the process of forming, and then the granular activated carbon is subjected to kneading and stirring uniformly and then is subjected to forced hydraulic granulation forming by a 500-ton hydraulic press.
The two active carbon products have the following defects when in use:
1) The pore structures of the coal-based activated carbon and the coconut shell activated carbon are far less developed than those of the wood-based activated carbon, and the coal-based activated carbon and the coconut shell activated carbon have only developed micropores, but have no large holes and medium holes unique to the wood-based activated carbon, so that the coal-based activated carbon and the coconut shell activated carbon have the effects on various harmful gases in the air, and cannot be compared with the wood-based activated carbon;
2) The density of the coal-based activated carbon and the coconut shell activated carbon is high, the stacking specific gravity is high, the adsorption capacity is very limited, and the volume of the wood activated carbon is large, the specific gravity is light, and the adsorption function is strong;
3) The columnar or granular coal activated carbon prepared from coal tar and asphalt can generate strong stink smell when carrying the modified catalyst, and seriously pollute the environment;
4) Because of the bulk specific gravity of the coal columnar activated carbon and the coconut shell granular activated carbon, the production cost and the operation cost can be greatly increased when the air purifier filter screen and the air purifying tower are manufactured;
5) Because the large and medium holes of the coal-based activated carbon and the coconut shell activated carbon are undeveloped, when the catalyst is loaded, the catalyst can only be loaded in the tiny micropores and on the surface of the activated carbon, thereby greatly reducing the purification effect and the purification capability of the catalyst.
Based on this, a person skilled in the art provides a wood particle activated carbon and a preparation process thereof, so as to solve the problems set forth in the background art.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides the wood granular activated carbon and the preparation process thereof, and columnar or granular activated carbon prepared from the wood activated carbon has the advantages of large volume, developed pore structure, strong adsorption capacity, high formaldehyde effective removal rate up to more than 97%, better air cleaning effect, and solves the problems of high density, large stacking specific gravity and very limited adsorption capacity of the traditional coal activated carbon and coconut shell activated carbon.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme:
the wood granular activated carbon comprises the following main raw material components in parts by weight: 90-100 parts of wood powder active carbon, 20-25 parts of organic nano bentonite, 6-8 parts of adhesive, 0.5-0.9 part of curing agent, 2.5-4.5 parts of sodium bicarbonate, 9-13 parts of acrylic acid and 180-200 parts of water, and the wood powder active carbon is prepared by mixing, uniformly stirring, granulating and airing the above raw materials, and then performing physical activation, wherein the wood powder active carbon powder is prepared from aged wood chips and 85% of hot food grade phosphoric acid according to the wood chips: thermal food grade phosphoric acid = 1:1.2 to 1.5, and is prepared by fully stirring and standing, and then carrying out high-temperature carbonization and activation, recovery, rinsing, airing and powder preparation.
Preferably, the wood powder activated carbon is powder activated carbon with the particle size of 250-320 meshes.
Preferably, the wood granular activated carbon is columnar or spherical granular activated carbon, and the grain diameter and the length of the wood granular activated carbon are generally controlled to be about 2.0mm in grain diameter and 3-6mm in length.
Preferably, the preparation method of the wood powder activated carbon comprises the following steps:
1) And (3) batching:
the aged fir wood chips are selected, the water content is controlled to be 12-16%, and then the heat method food-grade phosphoric acid with the concentration of 85% is selected, so that the fir wood chips are prepared according to the following steps: thermal food grade phosphoric acid = 1:1.2 to 1.5, and standing for more than 30 minutes after being evenly mixed and stirred;
2) High temperature carbonization and activation:
carbonizing and activating the mixed fir wood chips at a high temperature of 250-300 ℃ for 45-55 minutes, and activating at 470-500 ℃ for 55-65 minutes;
3) Rinsing and airing:
washing off phosphoric acid on the surfaces of fir wood chips, recycling, and finally airing the wood chips;
4) Pulverizing:
and (3) drying the dried wood dust, grinding the dried wood dust into powder, and passing the powder through 95% when the powder reaches 300 meshes to obtain the wood powder activated carbon.
Preferably, the preparation process of the wood particle activated carbon comprises the following steps of:
s1, preparing materials
The preparation method comprises the following steps of: 90-100 parts of wood powder active carbon, 20-25 parts of organic nano bentonite, 6-8 parts of adhesive, 0.5-0.9 part of curing agent, 2.5-4.5 parts of sodium bicarbonate, 9-13 parts of acrylic acid and 180-200 parts of water;
s2, preparing adhesive liquid
Stirring the adhesive, the curing agent, sodium bicarbonate, acrylic acid and water at a high speed to fully and uniformly mix the raw materials to form a homogeneous adhesive fluid adhesive liquid;
s3, mixing materials
Stirring and mixing the wood powder active carbon, the organic nano bentonite and the adhesive liquid at a high speed to ensure that the wood powder active carbon and the prepared adhesive liquid are completely dissolved into a whole;
s4, granulating
Molding and granulating by a screw extruding machine or a hydraulic granulator, and airing until the water content is below 30% -40% after granulating;
s5, secondary physical activation
Placing the dried particles into an external combustion type converter, when the temperature in a hearth is raised to 645-655 ℃, introducing high-temperature steam for secondary activation, and introducing a certain amount of nitrogen at the same time;
s6, cooling and screening
Cooling for more than 30 minutes by using a cooler, and sieving to obtain the wood particle activated carbon.
Preferably, the adhesive liquid prepared in the step S2 is sheared and stirred at a high speed by a high-speed dispersing machine, and the material stirred in the step S3 is stirred, sheared and mixed at a high speed by a high-speed mixer.
Preferably, the granulating pressure of the granulating equipment in the step S4 is 5.0-7.0MPa, and the specification and the particle size of the granulated particles are 2.0-2.5mm.
Preferably, the heating combustion chamber of the external combustion type rotary furnace used for the secondary physical activation in the step S5 is arranged at the periphery of an interlayer of the hearth, materials are arranged at the inner ring of the hearth, an air chamber space formed by the interlayer is arranged between the heating combustion chamber and the inner ring of the hearth, the temperature of the introduced steam is 180-200 ℃, the air pressure is 4.0-5.0MPa, the introduced amount is 0.5-0.8t/h, and the nitrogen adding amount is 1.4-1.6kg/h.
(III) beneficial effects
The invention provides wood particle activated carbon and a preparation process thereof. The beneficial effects are as follows:
1. according to the wood particle activated carbon and the preparation process thereof provided by the invention, high-quality wood chips are selected for carbonization and activation, a good foundation is laid for manufacturing the multi-aperture pore volume and high-adsorption-desorption-performance automobile carbon tank activated carbon, the aging treatment time of the fir wood chips is more than two months, and the grease in the fir wood chips is decomposed and volatilized after natural fermentation, so that the carbonization and activation efficiency is improved, and the hot food-grade phosphoric acid with the content of 85% is adopted, so that the harmful impurities in the activated carbon can be better reduced, and the purity of the activated carbon is improved.
2. According to the wood granular activated carbon and the preparation process thereof provided by the invention, columnar or granular activated carbon prepared from the wood activated carbon is selected, the wood granular activated carbon has the advantages of large volume, developed pore structure, strong adsorption capacity, more than 97% of formaldehyde effective removal rate and better air cleaning effect.
3. According to the wood particle activated carbon and the preparation process thereof provided by the invention, the wood particle activated carbon can carry more than twice of catalyst than coal activated carbon and coconut shell activated carbon, so that the performance of the activated carbon in an air purifier and the service cycle of an air filter screen are greatly improved, the stacking ratio of the wood particle activated carbon is 0.35g/ml, the wood particle activated carbon is light carbon, and the wood particle activated carbon is more than 50% lighter than coal activated carbon, so that the consumption of the wood particle activated carbon is more than 50% of that of other activated carbon, and the environment-friendly and energy-saving effects can be realized, and the production cost of enterprises can be reduced.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
the embodiment of the invention provides wood particle activated carbon, which comprises the following main raw material components in parts by weight: 90 parts of wood powder active carbon, 20 parts of organic nano bentonite, 6 parts of adhesive, 0.5 part of curing agent, 2.5 parts of sodium bicarbonate, 9 parts of acrylic acid and 180 parts of water, and the wood powder active carbon is prepared by mixing, uniformly stirring, granulating and airing the above raw materials, and then performing physical activation, wherein the wood powder active carbon powder is prepared from aged wood chips and 85% of hot food-grade phosphoric acid according to the wood chips: thermal food grade phosphoric acid = 1:1.2, fully stirring and standing, and then carbonizing and activating at high temperature, recycling, rinsing, airing and pulverizing.
The wooden powder active carbon is 280 mesh powder active carbon, the wooden particle active carbon is columnar or spherical particle active carbon, the particle size and the length are generally controlled to be about 2.0mm, and the length is 4mm.
The preparation method of the wood powder activated carbon comprises the following steps:
1) And (3) batching:
the aged fir wood chips are selected, the water content is controlled to be 14%, and then the heat method food-grade phosphoric acid with the concentration of 85% is selected, so that the fir wood chips are prepared according to the following steps: thermal food grade phosphoric acid = 1:1.2, mixing, stirring uniformly, and standing for more than 30 minutes;
2) High temperature carbonization and activation:
carbonizing and activating the mixed fir wood chips at a high temperature of 280 ℃ for 50 minutes and an activation temperature of 485 ℃ for 60 minutes;
3) Rinsing and airing:
washing off phosphoric acid on the surfaces of fir wood chips, recycling, and finally airing the wood chips;
4) Pulverizing:
and (3) drying the dried wood dust, grinding the dried wood dust into powder, and passing the powder through 95% when the powder reaches 300 meshes to obtain the wood powder activated carbon.
The preparation process of the wood particle activated carbon comprises the following steps:
s1, preparing materials
The preparation method comprises the following steps of: 90 parts of wood powder active carbon, 20 parts of organic nano bentonite, 6 parts of adhesive, 0.5 part of curing agent, 2.5 parts of sodium bicarbonate, 9 parts of acrylic acid and 180 parts of water;
s2, preparing adhesive liquid
Stirring the adhesive, the curing agent, sodium bicarbonate, acrylic acid and water at a high speed to fully and uniformly mix the raw materials to form a homogeneous adhesive fluid adhesive liquid;
s3, mixing materials
Stirring and mixing the wood powder active carbon, the organic nano bentonite and the adhesive liquid at a high speed to ensure that the wood powder active carbon and the prepared adhesive liquid are completely dissolved into a whole;
s4, granulating
Molding and granulating by a screw extruding machine or a hydraulic granulator, and airing until the water content is below 30% -40% after granulating;
s5, secondary physical activation
Placing the dried particles into an external combustion type converter, when the temperature in a hearth is raised to 650 ℃, introducing high-temperature steam for secondary activation, and introducing a certain amount of nitrogen;
s6, cooling and screening
Cooling for more than 30 minutes by using a cooler, and sieving to obtain the wood particle activated carbon.
The adhesive liquid is prepared in the step S2 by adopting a high-speed dispersing machine to carry out high-speed shearing stirring, the material is stirred in the step S3 by adopting a high-speed mixer to carry out high-speed stirring, shearing and mixing, the granulating pressure of granulating equipment in the step S4 is 6.0MPa, the specification particle size of the granulated particles is 2.2mm, a heating combustion chamber of an external combustion type rotary furnace used for secondary physical activation in the step S5 is arranged at the periphery of an interlayer of a hearth, the material is arranged at the inner ring of the hearth, a space of an air chamber formed by the interlayer is arranged between the material and the material, the temperature of the introduced steam is 200 ℃, the air pressure is 4.5MPa, the introduced amount is 0.7t/h, and the nitrogen added amount is 1.4kg/h.
Example 2:
the embodiment of the invention provides wood particle activated carbon, which comprises the following main raw material components in parts by weight: 95 parts of wood powder active carbon, 22 parts of organic nano bentonite, 7 parts of adhesive, 0.7 part of curing agent, 3.5 parts of sodium bicarbonate, 11 parts of acrylic acid and 190 parts of water, and the raw materials are mixed, uniformly stirred, granulated and dried, and then are subjected to physical activation to prepare the wood particle active carbon, wherein the wood powder active carbon powder is prepared from aged wood chips and 85% of hot food-grade phosphoric acid according to the wood chips: thermal food grade phosphoric acid = 1:1.3, fully stirring and standing, and then carbonizing and activating at high temperature, recycling, rinsing, airing and pulverizing.
The preparation process of the wood particle activated carbon comprises the following steps:
s1, preparing materials
The preparation method comprises the following steps of: 95 parts of wood powder active carbon, 22 parts of organic nano bentonite, 7 parts of adhesive, 0.7 part of curing agent, 3.5 parts of sodium bicarbonate, 11 parts of acrylic acid and 190 parts of water;
s2, preparing adhesive liquid
Stirring the adhesive, the curing agent, sodium bicarbonate, acrylic acid and water at a high speed to fully and uniformly mix the raw materials to form a homogeneous adhesive fluid adhesive liquid;
s3, mixing materials
Stirring and mixing the wood powder active carbon, the organic nano bentonite and the adhesive liquid at a high speed to ensure that the wood powder active carbon and the prepared adhesive liquid are completely dissolved into a whole;
s4, granulating
Molding and granulating by a screw extruding machine or a hydraulic granulator, and airing until the water content is below 30% -40% after granulating;
s5, secondary physical activation
Placing the dried particles into an external combustion type converter, when the temperature in a hearth is raised to 650 ℃, introducing high-temperature steam for secondary activation, and introducing a certain amount of nitrogen;
s6, cooling and screening
Cooling for more than 30 minutes by using a cooler, and sieving to obtain the wood particle activated carbon.
Example 3:
the embodiment of the invention provides wood particle activated carbon, which comprises the following main raw material components in parts by weight: 100 parts of wood powder active carbon, 25 parts of organic nano bentonite, 8 parts of adhesive, 0.9 part of curing agent, 4.5 parts of sodium bicarbonate, 13 parts of acrylic acid and 200 parts of water, and the raw materials are mixed, uniformly stirred, granulated and dried, and then are subjected to physical activation to prepare the wood particle active carbon, wherein the wood powder active carbon powder is prepared from aged wood chips and 85% of hot food-grade phosphoric acid according to the wood chips: thermal food grade phosphoric acid = 1:1.4, fully stirring and standing, and then carbonizing and activating at high temperature, recycling, rinsing, airing and pulverizing.
The preparation process of the wood particle activated carbon comprises the following steps:
s1, preparing materials
The preparation method comprises the following steps of: 100 parts of wood powder active carbon, 25 parts of organic nano bentonite, 8 parts of adhesive, 0.9 part of curing agent, 4.5 parts of sodium bicarbonate, 13 parts of acrylic acid and 200 parts of water;
s2, preparing adhesive liquid
Stirring the adhesive, the curing agent, sodium bicarbonate, acrylic acid and water at a high speed to fully and uniformly mix the raw materials to form a homogeneous adhesive fluid adhesive liquid;
s3, mixing materials
Stirring and mixing the wood powder active carbon, the organic nano bentonite and the adhesive liquid at a high speed to ensure that the wood powder active carbon and the prepared adhesive liquid are completely dissolved into a whole;
s4, granulating
Molding and granulating by a screw extruding machine or a hydraulic granulator, and airing until the water content is below 30% -40% after granulating;
s5, secondary physical activation
Placing the dried particles into an external combustion type converter, when the temperature in a hearth is raised to 650 ℃, introducing high-temperature steam for secondary activation, and introducing a certain amount of nitrogen;
s6, cooling and screening
Cooling for more than 30 minutes by using a cooler, and sieving to obtain the wood particle activated carbon.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The wood granular activated carbon is characterized by comprising the following main raw material components in parts by weight: 90-100 parts of wood powder active carbon, 20-25 parts of organic nano bentonite, 6-8 parts of adhesive, 0.5-0.9 part of curing agent, 2.5-4.5 parts of sodium bicarbonate, 9-13 parts of acrylic acid and 180-200 parts of water, and the wood powder active carbon is prepared by mixing, uniformly stirring, granulating and airing the above raw materials, and then performing physical activation, wherein the wood powder active carbon powder is prepared from aged wood chips and 85% of hot food grade phosphoric acid according to the wood chips: thermal food grade phosphoric acid = 1:1.2 to 1.5, and is prepared by fully stirring and standing, and then carrying out high-temperature carbonization and activation, recovery, rinsing, airing and powder preparation.
2. A wood-based granular activated carbon according to claim 1 wherein said wood-based powdered activated carbon is a powdered activated carbon having a particle size of 250-320 mesh.
3. The wood-based granular activated carbon of claim 1, wherein the wood-based granular activated carbon is a columnar or spherical granular activated carbon, and the particle size and length thereof are generally controlled to be about 2.0mm in size and 3-6mm in length.
4. The wood-based granular activated carbon of claim 1, wherein the wood-based powdered activated carbon is prepared by the following method:
1) And (3) batching:
the aged fir wood chips are selected, the water content is controlled to be 12-16%, and then the heat method food-grade phosphoric acid with the concentration of 85% is selected, so that the fir wood chips are prepared according to the following steps: thermal food grade phosphoric acid = 1:1.2 to 1.5, and standing for more than 30 minutes after being evenly mixed and stirred;
2) High temperature carbonization and activation:
carbonizing and activating the mixed fir wood chips at a high temperature of 250-300 ℃ for 45-55 minutes, and activating at 470-500 ℃ for 55-65 minutes;
3) Rinsing and airing:
washing off phosphoric acid on the surfaces of fir wood chips, recycling, and finally airing the wood chips;
4) Pulverizing:
and (3) drying the dried wood dust, grinding the dried wood dust into powder, and passing the powder through 95% when the powder reaches 300 meshes to obtain the wood powder activated carbon.
5. The preparation process of the wood particle activated carbon is characterized by comprising the following steps of:
s1, preparing materials
The preparation method comprises the following steps of: 90-100 parts of wood powder active carbon, 20-25 parts of organic nano bentonite, 6-8 parts of adhesive, 0.5-0.9 part of curing agent, 2.5-4.5 parts of sodium bicarbonate, 9-13 parts of acrylic acid and 180-200 parts of water;
s2, preparing adhesive liquid
Stirring the adhesive, the curing agent, sodium bicarbonate, acrylic acid and water at a high speed to fully and uniformly mix the raw materials to form a homogeneous adhesive fluid adhesive liquid;
s3, mixing materials
Stirring and mixing the wood powder active carbon, the organic nano bentonite and the adhesive liquid at a high speed to ensure that the wood powder active carbon and the prepared adhesive liquid are completely dissolved into a whole;
s4, granulating
Molding and granulating by a screw extruding machine or a hydraulic granulator, and airing until the water content is below 30% -40% after granulating;
s5, secondary physical activation
Placing the dried particles into an external combustion type converter, when the temperature in a hearth is raised to 645-655 ℃, introducing high-temperature steam for secondary activation, and introducing a certain amount of nitrogen at the same time;
s6, cooling and screening
Cooling for more than 30 minutes by using a cooler, and sieving to obtain the wood particle activated carbon.
6. The process for preparing wood particle activated carbon according to claim 5, wherein: and (3) carrying out high-speed shearing stirring on the binding liquid prepared in the step (S2) by adopting a high-speed dispersing machine, and carrying out high-speed stirring, shearing and mixing on the stirring materials in the step (S3) by adopting a high-speed mixer.
7. The process for preparing wood particle activated carbon according to claim 5, wherein: the granulating pressure of the granulating equipment in the step S4 is 5.0-7.0MPa, and the specification and the particle size of the granulated particles are 2.0-2.5mm.
8. The process for preparing wood particle activated carbon according to claim 5, wherein: the heating combustion chamber of the external combustion type rotary furnace used for secondary physical activation in the step S5 is arranged at the periphery of an interlayer of a hearth, materials are arranged at the inner ring of the hearth, an air chamber space formed by the interlayer is arranged between the heating combustion chamber and the inner ring of the hearth, the temperature of the introduced steam is 180-200 ℃, the air pressure is 4.0-5.0MPa, the introduced amount is 0.5-0.8t/h, and the nitrogen adding amount is 1.4-1.6kg/h.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106000432A (en) * | 2016-05-24 | 2016-10-12 | 湖南宇洁活性炭环保科技有限公司 | Wooden granular active carbon loaded with catalyst and used for purifying air and preparation method thereof |
| CN106000376A (en) * | 2016-05-24 | 2016-10-12 | 湖南宇洁活性炭环保科技有限公司 | Woody granular activated carbon used for supporting catalyst and preparation method thereof |
| CN107140636A (en) * | 2017-07-03 | 2017-09-08 | 湖南宇洁活性炭环保科技有限公司 | Efficient wood substance grain activated carbon for automobile canister and preparation method thereof |
| CN107986273A (en) * | 2017-12-18 | 2018-05-04 | 玉山县三清活性炭有限公司 | Wood substance grain activated carbon and preparation method thereof |
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- 2023-02-16 CN CN202310123258.XA patent/CN116354346A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106000432A (en) * | 2016-05-24 | 2016-10-12 | 湖南宇洁活性炭环保科技有限公司 | Wooden granular active carbon loaded with catalyst and used for purifying air and preparation method thereof |
| CN106000376A (en) * | 2016-05-24 | 2016-10-12 | 湖南宇洁活性炭环保科技有限公司 | Woody granular activated carbon used for supporting catalyst and preparation method thereof |
| CN107140636A (en) * | 2017-07-03 | 2017-09-08 | 湖南宇洁活性炭环保科技有限公司 | Efficient wood substance grain activated carbon for automobile canister and preparation method thereof |
| CN107986273A (en) * | 2017-12-18 | 2018-05-04 | 玉山县三清活性炭有限公司 | Wood substance grain activated carbon and preparation method thereof |
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