CN107986273A - Wood substance grain activated carbon and preparation method thereof - Google Patents
Wood substance grain activated carbon and preparation method thereof Download PDFInfo
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- CN107986273A CN107986273A CN201711361276.2A CN201711361276A CN107986273A CN 107986273 A CN107986273 A CN 107986273A CN 201711361276 A CN201711361276 A CN 201711361276A CN 107986273 A CN107986273 A CN 107986273A
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Abstract
The present invention discloses a kind of wood substance grain activated carbon and preparation method thereof, belong to the activated carbon of automobile canister and preparation method thereof field, its primary raw material Ingredient Wt ratio is wood activated charcoal powder: organic sodium base bentonite: water=1: 0.2 0.25: 0.8 1.0, it is granulated after three kinds of raw materials are stirred evenly, granulation carries out physically activated rear obtained after drying, the wood activated charcoal powder is 85% hot method food grade phosphoric acid according to sawdust by aged sawdust and concentration: hot method food grade phosphoric acid=1: 1.2 1.5 weight ratio mixes, after being sufficiently stirred quiet stain, activated again through high temperature carbonization, recycling, rinsing, dry, powder processed forms；Its preparation method includes two wood activated charcoal powder processed, wood substance grain activated carbon processed main processes.Product strength of the present invention is high, and effective aperture pore volume is more flourishing, be more evenly distributed, adsorb and desorption performance is good, gas flow resistance is small.
Description
Technical field
The present invention relates to automobile canister activated carbon and preparation method field, particularly relates to a kind of chemical activation method and physics
Wood substance grain activated carbon that activation method is combined and preparation method thereof.
Background technology
At present, with increasingly stringent and purifying vehicle exhaust technology the ripe application of automobile emissions standards, fuel evaporation
Ratio of the hydrocarbon in tail gas in vehicle discharge gradually steps up afterwards.Canister is the key of gasoline car fuel evaporation control
Component, its core material are the pressed active carbons of gasoline adsorption, desorption.The pressed active carbon of canister technical requirements has high
Specific surface area and high intensity, need effective pore volume to reach 2-5mn, it is necessary to have the function of quick adsorption and desorption gasoline.Therefore use
The method that chemical method and chemicals logos are combined is to prepare the effective way of high-specific surface area and big pore volume activated carbon, and into
Type prepares the development trend of automobile canister activated carbon with activation integral.And the automobile used at present in China automobile production field
The production technology of canister activated carbon is to use sawdust as raw material, through crushing, mixing, extrusion forming, drying, charing, activation and make
Into the activated carbon so produced has following several point defects：(1) intensity is low because sawdust by with chemical activating agent
Phosphoric acid stirs extrusion forming, and then high temperature carbonization activates again, and will certainly be produced among high temperature carbonization activation after formed of xylolite
Shrink and cracking phenomena, and phase mutual friction and collision between charcoal and charcoal can be produced among production, therefore work can be substantially reduced
The intensity of property charcoal, product strength is low, and dynamics is uneven, and dry linting is serious, frangible.(2) absorption and desorption performance are poor, service life
It is low.The production technology of carbonization-activation is cannot to meet the production needs of market high-quality pressed active carbon after this first shaping,
Because activated carbon mainly manufactures effective aperture and pore volume among carbonization-activation process, that is to say, that effective aperture pore volume is got over
The absorption of more, more flourishing activated carbon and desorption performance are better, and existing traditional handicraft is using the production work for being first molded post activation
Skill, this production technology are to dry sawdust by screening, then add phosphoric acid solution progress kernel stirring and wood substance grain is made,
The product obtained again by carbonization-activation, the product that this production technology obtains, the distribution of its pore structure and aperture pore volume
It is non-uniform, is found in by pore structure and the detection of specific surface area analysis instrument, there is 2-7mn in the aperture on its surface, compares table
Area has 1500 m2/ g, and the only 0.5-2mn of particle center section, specific surface area only have 800 or so；Therefore, traditional handicraft
The automobile canister activated carbon of production can only adsorption, the activated carbon so produced only has surface to have certain pore
Appearance and functional group, it is difficult to have aperture pore volume up to standard that the inside, which is, therefore its performance and displacement volume can have a greatly reduced quality, so that
Cause its service life short, the defects of poor performance.(3) gas flow resistance is big, because the aperture pore volume of activated carbon reaches all the more,
Its gas flow resistance is fewer, and above-mentioned this production technology only has surface to have certain aperture pore volume, and in charcoal
Between cannot get effective carbonization-activation, so as to cause there is no aperture pore volume inside charcoal post, so its flow resistance to gas
Greatly, it is unfavorable for absorption and desorption of the activated carbon to volatile solvent, reduces recovery utilization rate.
The content of the invention
High the object of the present invention is to provide a kind of intensity, effective aperture pore volume is more flourishing, is more evenly distributed, adsorbs and is desorbed
The wood substance grain activated carbon that performance is good, gas flow resistance is small.
The present invention proposes a kind of wood substance grain activated carbon, its primary raw material Ingredient Wt ratio is wood activated charcoal powder: is had
Machine sodium base bentonite: water=1: 0.2-0.25: 0.8-1.0, it is granulated after three kinds of raw materials are stirred evenly, granulation carries out thing after drying
It is made after reason activation, the wood activated charcoal powder is 85% hot method food grade phosphoric acid according to wood by aged sawdust and concentration
Bits: hot method food grade phosphoric acid=1: the weight ratio mixing of 1.2-1.5, after being sufficiently stirred quiet stain, then activates through high temperature carbonization, returns
Receive, rinse, drying, powder processed forms.
Preferably, it is column or spherical particle activated carbon, and particle diameter and length general control are in particle diameter 2.0mm, length 3-
6mm。
The present invention also proposes a kind of preparation method of wood activated charcoal, including two main processes,
First process is wood activated charcoal powder processed, is comprised the following steps：
A, dispensing：The China fir sawdust after ageing is selected, its moisture control is in 12-16%；Selection concentration is 85% hot method
Food grade phosphoric acid, according to China fir sawdust: hot method food grade phosphoric acid=1: the ratio of 1.2-1.5 is mixed, is mediated after stirring evenly simultaneously
Quiet stain more than 30 minutes；
B, high temperature carbonization：250-300 DEG C of carbonization temperature, carbonization time 45-55 minutes；
C, activate：470-500 DEG C of activation temperature, soak time 55-65 minutes
D, rinse, dry：Wash away phosphoric acid and recycle, dry sawdust；
E, powder processed：Sawdust drying after drying, and beat and clay into power, cross 95% up to 300 mesh；
Second process is wood substance grain activated carbon processed, is comprised the following steps：
F, batch mixing: according to wood activated charcoal powder: organic sodium base bentonite: water=1: 0.2-0.25: 0.8-1.0 weight
Than in the wood activated charcoal powder for making organic sodium base bentonite, water incorporation, stirring evenly three kinds of raw materials, mixing time
For more than 40 minutes；
G, it is granulated：Molding granulation is carried out with screw rod banded extruder or hydraulic pressure comminutor, it is 30%- to be dried after granulation to moisture
40%；
H, secondary physical activates：In the external-burning converter that particle after drying is put into, production temperature in burner hearth is warming up to
For 645 DEG C -655 DEG C when, be passed through high-temperature water vapor and carry out re-activation, while be also passed through a certain amount of nitrogen；
I, cooling, screening：Sieved after carrying out the cooling of more than 30 minutes with cooler.
Preferably, in step " A, dispensing ", the China fir sawdust answers particle uniform, particle diameter 0.1-0.8mm, through two months
Above ripening；It using yellow phosphorus is raw material that thermal phosphoric acid, which is, and yellow phosphorus burning first is obtained phosphorus pentoxide and is water-cooled again
With absorption and manufactured phosphoric acid.
In step " F, batch mixing ", it is aqueous clay pit based on montmorillonite that organic sodium base bentonite, which is, and alkaline coefficient is big
In or equal to 1.
In step " H, secondary physical activation "；The temperature of vapor is 180 DEG C -200 DEG C, air pressure 4-5MPa, intake
For 0.5-0.8t/h, nitrogen addition is 1.4-1.6kg/h.
In step " H, secondary physical activation ", the heating combustion chamber of external-burning revolving burner is in the interlayer periphery of burner hearth, material
In the inner ring of burner hearth, the plenum space formed between the two across an interlayer.
In step " I, cooling, screening ", cooler is rotary chilling roll, and roller external application water spray is cooled down.
The beneficial effects of the invention are as follows：(1) high-quality sawdust is selected to carry out first carbonization-activation, it is high to manufacture multiple aperture pore volume
Adsorption/desorption performance automobiles canister activated carbon is had laid a good foundation, the China fir sawdust ripening time to reach two months with
On, make the grease in Chinese fir wood chip by being decomposed and vaporing away after spontaneous fermentation, so as to improve the efficiency of carbonization-activation. (2)
Content is used preferably to reduce the objectionable impurities in activated carbon for 85% hot method food grade phosphoric acid, improve the pure of activated carbon
Degree.Phosphoric acid production active carbon by chemical method among it be a kind of activating agent, fire retardant, catalyst.Therefore, the quality of phosphoric acid is direct
Influence the product quality of activated carbon, the hot method food grade phosphoric acid purity in the present invention is high, and impurity is few, and phosphorus acid content height etc., is better than
Common phosphoric acid, flexible phosphoric acid are to use phosphoric acid made from sulfuric acid decomposition phosphorus ore, and poor product quality, impurity content is more, and acid content is inclined
Low bad phenomenon, mainly for the production of fertilizer or purified rear manufacture feed phosphate product.(3) pinched by being sufficiently stirred
Close, can reach activator " phosphoric acid " and sawdust and be impregnated with completely and saturation, then allow the material being stirred again quiet stain 30 minutes with
On, the product pore structure so produced is stable, uniform, and effective aperture pore volume is more, more preferable.(4) by carbonization-activation
Wooden powder's activated carbon reshaping granulation with rinsed clean solves originaling forming activated carbon and there was only surface tool for a full due
There is the defects of certain adsorption function, enhance whole activated carbon adsorption and desorption effect, extend the service life of activated carbon.
Using the production technology of aftershaping, automobile canister activated carbon obtained from the Powdered Activated Carbon activated is granulated again,
Its key problem in technology point is first to activate aftershaping, that is, all Powdered Activated Carbons before granulation are with very flourishing
Aperture and pore volume, then again using organobentonite as adhesive, by stirring, being molded, pelletizing, screening obtained product, it
Surface functional groups with the quality of particle middle part functional group be consistent, performance is consistent, therefore possesses overall absorption
Effect.(5) select plus 20% organobentonite does shaping adhesive material, mainly utilize the synusia of montmorillonite in bentonite
Shape structure and its can be swollen in water or organic solvent and resolve into colloid and glue glutinous characteristic, have good thickening property, thixotropy,
High-temperature stability, lubricity, film forming, water resistance and chemical stability, while also there is very strong absorption property, because
This, the viscous glutinous agent of shaping is done with the benefit killed two birds with one stone using organobentonite.(6) according to the design shape of different activities canister
And the needs of client, different formers can be selected, obtains the ligno activated carbon of different size, there is column, spherical
Deng for wherein most with columnar for leading products, particle diameter is mostly 20mm × 30mm；20mm × 50mm, column-shaped active carbon
Intensity wants remote hypersphere shaped activated carbon.(7) shaping after drying, using external-burning activate converter, by molded activated carbon into
Row secondary physical method activates, and obtained product has following superiority and advance：1. effective aperture pore volume is more flourishing, divides
Cloth evenly, it is more reasonable.If be first molded, the wooden column-shaped active carbon after shaping, works as if mediating stirring with sodium bentonite
The middle pore structure that can be destroyed with blocking portion activated carbon, and unformed wooden powdered activated carbon is in first time carbonization-activation
When, due to the factor of each side, its effective aperture is perfect not enough, and absorption and desorption ability can't fully meet canister
It is required that and the technical matters of the re-activation of the present invention is using physically activated, production process does not add any chemical substance, with
Steam and inert nitrogen gas are catalytic activity agent, and the cylindrical particle activated carbon after shaping is at a high temperature of 650 DEG C or so, by sodium
Colloidal substance in base bentonite, and the bentonite molecule being blocked in activated carbon hole are sintered charing, then in steam
Be catalyzed, activate under the action of nitrogen, increase sharply and expand activated carbon and sodium bentonite effective aperture pore volume, bentonite sheet
Body is a kind of natural sorbing material, and activated carbon is original irregular, unreasonable, inapplicable aperture pore volume and surface functional groups
Repair perfect, therefore specific surface area is also greatly improved.2. it is with strong points, exist to gasoline such as nytron materials
The pernicious gas that burning and volatilization produce in the middle has fabulous suction-operated, and hydrocarbon (PAHS) is a kind of polycyclic aromatic hydrocarbon
(Polycyclic Aromatic Hydrocarbons, abbreviation PAHS) pernicious gas, be oil, coal, timber, tobacco etc.
Escaping gas caused by organic high molecular compound imperfect combustion, is important environment and food contaminant.Because carbon
The main component of hydrogen compound is the pernicious gas of alkane etc, and passes through the wooden canister activated carbon of re-activation, its aperture
Pore volume is more flourishing, and pore structure has more reasonability, more to the effective aperture of adsorbing hydrocarbon, adsorbance bigger, this hair
Bright per kilogram activated carbon can adsorb up to 2 kilograms of hydrocarbon.3. displacement volume is big, absorption can be greatly prolonged, taken off
Attached usage time, by the wood activated charcoal of re-activation, its aperture pore volume is more flourishing, and pore structure is more reasonable, compares table
Area bigger, effective pore volume is more, therefore displacement volume bigger, service life are more long.4. proportion is lighter, gas flow resistance
Few, absorption and desorption of the activated carbon to volatile solvent are faster, more efficient.5. there is high absorption, low remaining to gasoline vapor
Positive effect.Because the product obtained by re-activation production technology, its effective aperture is more, specific surface area bigger,
Surface functional groups are more flourishing, therefore its absorption and desorption performance to gasoline vapor is more preferable, is remained in after desorption in activated carbon
Gasoline is less.The product butane working capacity of the present invention, specific surface area, effective pore volume, iodine sorption value, carbon tetrachloride, abrasion are strong
The indexs such as degree are far above market mill run.6. using the production technology of aftershaping re-activation again, activity can be greatly increased
Intensity of charcoal itself, is that the wooden powdered activated carbon that will have been activated adds water with bentonite using the production technology of rear forming
After being stirred, then the column shape product obtained by screw rod extrusion granulator strong force extruding, then by nature
Dry and carry out second of 650 DEG C of high-temperature activation again, bentonite generates high temperature polymerization agent after oversintering, can greatly improve movable forming
The compression strength and wearability of property charcoal, so as to add resistance to compression and the wear-resistant strength of finished particle activated carbon, prevent dry linting and produce
Raw secondary pollution, while can be satisfied with and effectively be worked under harsh working environment.Re-activation, while be also passed through certain
The nitrogen of amount, nitrogen are also a kind of catalyst at high temperature under high pressure, can increase and expand under the high temperature conditions activated carbon after being molded
Effective aperture and pore volume, the innovative point that nitrogen is the present invention is added in re-activation at the same time, because nitrogen is a kind of lazy
Property gas, property is special, and effect is extensive, and has non-condensation gas performance, its coefficient of expansion is larger under hyperbaric environment.This
Invention uses the main purpose of nitrogen, first, the foramen primum footpath pore volume when secondary high-temperature activates of the activated carbon after protection shaping is not subject to
Destroy；Second, make the temperature equalization in external-burning converter using the non-condensation performance of nitrogen, it is ensured that activated carbon adds steaming at the same time
Sufficiently activated under the action of vapour, so that the pore volume of activated carbon is more flourishing, effective aperture is more；Third, utilize nitrogen
Inertia performance, the activated carbon that can be efficiently controlled in stove do not burn, do not explode.
In short, the efficient wood substance grain activated carbon intensity of the present invention is high, effective aperture pore volume is more flourishing, be more evenly distributed,
Absorption and the wood substance grain activated carbon that desorption performance is good, gas flow resistance is small.
Embodiment
Embodiment one
Wood substance grain activated carbon in the present embodiment, its primary raw material Ingredient Wt ratio are wood activated charcoal powder: organic
Sodium base bentonite: water=1: 0.2: 0.85, it is granulated after three kinds of raw materials are stirred evenly, granulation carries out physically activated rear system after drying
, the wood activated charcoal powder is 85% hot method food grade phosphoric acid according to sawdust by aged sawdust and concentration: hot method is eaten
Grade phosphoric acid=1: 1.2 weight ratio mixing, after being sufficiently stirred quiet stain, then activates through high temperature carbonization, recycle, rinse, drying, making
Powder forms.It is column or spherical particle activated carbon, and particle diameter and length general control are in particle diameter 2.0mm, length 3-6mm.
The present embodiment also proposes a kind of preparation method of wood activated charcoal, including two main processes, first process
For wood activated charcoal powder processed, comprise the following steps：
A, dispensing：The China fir sawdust after ageing is selected, its moisture control is 12%；Selection concentration is 85% hot method food
Level phosphoric acid, according to China fir sawdust: hot method food grade phosphoric acid=1: 1.2 ratio is mixed, after kneading stirs evenly and quiet stain 30 is divided
It is more than clock；
B, high temperature carbonization：260 DEG C of carbonization temperature, carbonization time 45 minutes；
C, activate：480 DEG C of activation temperature, soak time 55 minutes
D, rinse, dry：Wash away phosphoric acid and recycle, dry sawdust；
E, powder processed：Sawdust drying after drying, and beat and clay into power, cross 95% up to 300 mesh；
Second process is wood substance grain activated carbon processed, is comprised the following steps：
F, batch mixing: according to wood activated charcoal powder: organic sodium base bentonite: water=1: 0.2: 0.85 weight ratio, will have
In the wood activated charcoal powder that machine sodium base bentonite, water incorporation make, stir evenly three kinds of raw materials, mixing time is 40 minutes
More than；
G, it is granulated：Molding granulation is carried out with screw rod banded extruder or hydraulic pressure comminutor, it is 30%- to be dried after granulation to moisture
40%；
H, secondary physical activates：In the external-burning converter that particle after drying is put into, production temperature in burner hearth is warming up to
For 645-650 DEG C when, be passed through high-temperature water vapor and carry out re-activation, while be also passed through a certain amount of nitrogen；
I, cooling, screening：Sieved after carrying out the cooling of more than 30 minutes with cooler.
Preferably, in step " A, dispensing ", the China fir sawdust answers particle uniform, particle diameter 0.1-0.8mm, through two months
Above ripening；It using yellow phosphorus is raw material that thermal phosphoric acid, which is, and yellow phosphorus burning first is obtained phosphorus pentoxide and is water-cooled again
With absorption and manufactured phosphoric acid.
In step " F, batch mixing ", it is aqueous clay pit based on montmorillonite that organic sodium base bentonite, which is, and alkaline coefficient is big
In or equal to 1, it is with bloating tendency, caking property, adsorptivity, catalytic, thixotropy, suspension and cation exchange etc.
Deng the interlamellar spacing of sodium base bentonite is in 1.2nm or so, chemical formula：Nax (H2O) 4 (AI2-xMg0.83) Si4O10) (OH) 2,
Its technical indicator is：Smectite content：60%-88%；Expansion capacity：25-50ml/g；Colloid index：≥99ml/15g；2h absorbs water
Rate：250-350%；Moisture≤12%, green compression strength：≥0.23mpa；Absorbance ratio-derivative method >=80mmol/100g；Na20≥1.28.Receive
Base bentonite is divided according to montmorillonite the exchangeable cationic type between layer species, content：Alkaline coefficient is sodium more than or equal to 1
Base bentonite, is calcium-base bentonite less than 1.
In step " H, secondary physical activation "；The temperature of vapor is 180 DEG C, air pressure 4.2MPa, intake 0.5-
0.8t/h, nitrogen addition are 1.4kg/h.
In step " H, secondary physical activation ", the heating combustion chamber of external-burning revolving burner is in the interlayer periphery of burner hearth, material
In the inner ring of burner hearth, the plenum space formed between the two across an interlayer.
In step " I, cooling, screening ", cooler is rotary chilling roll, and roller external application water spray is cooled down.
Embodiment two
Wood substance grain activated carbon in the present embodiment, its primary raw material Ingredient Wt ratio are wood activated charcoal powder: organic
Sodium base bentonite: water=1: 0.22: 0.9, it is granulated after three kinds of raw materials are stirred evenly, granulation carries out physically activated rear system after drying
, the wood activated charcoal powder is 85% hot method food grade phosphoric acid according to sawdust by aged sawdust and concentration: hot method is eaten
Grade phosphoric acid=1: 1.3 weight ratio mixing, after being sufficiently stirred quiet stain, then activates through high temperature carbonization, recycle, rinse, drying, making
Powder forms.It is column or spherical particle activated carbon, and particle diameter and length general control are in particle diameter 2.0mm, length 3-6mm.
The present embodiment also proposes a kind of preparation method of wood activated charcoal, including two main processes, first process
For wood activated charcoal powder processed, comprise the following steps：
A, dispensing：The China fir sawdust after ageing is selected, its moisture control is 12%；Selection concentration is 85% hot method food
Level phosphoric acid, according to China fir sawdust: hot method food grade phosphoric acid=1: 1.3 ratio is mixed, after kneading stirs evenly and quiet stain 30 is divided
It is more than clock；
B, high temperature carbonization：280 DEG C of carbonization temperature, carbonization time 48 minutes；
C, activate：490 DEG C of activation temperature, soak time 60 minutes
D, rinse, dry：Wash away phosphoric acid and recycle, dry sawdust；
E, powder processed：Sawdust drying after drying, and beat and clay into power, cross 95% up to 300 mesh；
Second process is wood substance grain activated carbon processed, is comprised the following steps：
F, batch mixing: according to wood activated charcoal powder: organic sodium base bentonite: water=1: 0.22: 0.9 weight ratio, will have
In the wood activated charcoal powder that machine sodium base bentonite, water incorporation make, stir evenly three kinds of raw materials, mixing time is 40 minutes
More than；
G, it is granulated：Molding granulation is carried out with screw rod banded extruder or hydraulic pressure comminutor, it is 30%- to be dried after granulation to moisture
40%；
H, secondary physical activates：In the external-burning converter that particle after drying is put into, production temperature in burner hearth is warming up to
For 650 DEG C when, be passed through high-temperature water vapor and carry out re-activation, while be also passed through a certain amount of nitrogen；
I, cooling, screening：Sieved after carrying out the cooling of more than 30 minutes with cooler.
Preferably, in step " A, dispensing ", the China fir sawdust answers particle uniform, particle diameter 0.1-0.8mm, through two months
Above ripening；It using yellow phosphorus is raw material that thermal phosphoric acid, which is, and yellow phosphorus burning first is obtained phosphorus pentoxide and is water-cooled again
With absorption and manufactured phosphoric acid.
In step " F, batch mixing ", it is aqueous clay pit based on montmorillonite that organic sodium base bentonite, which is, and alkaline coefficient is big
In or equal to 1.
In step " H, secondary physical activation "；The temperature of vapor is 190 DEG C, air pressure 4.5MPa, intake 0.5-
0.8t/h, nitrogen addition are 1.5kg/h.
In step " H, secondary physical activation ", the heating combustion chamber of external-burning revolving burner is in the interlayer periphery of burner hearth, material
In the inner ring of burner hearth, the plenum space formed between the two across an interlayer.
In step " I, cooling, screening ", cooler is rotary chilling roll, and roller external application water spray is cooled down.
Embodiment three
Wood substance grain activated carbon in the present embodiment, its primary raw material Ingredient Wt ratio are wood activated charcoal powder: organic
Sodium base bentonite: water=1: 0.25: 1.0, it is granulated after three kinds of raw materials are stirred evenly, granulation carries out physically activated rear system after drying
, the wood activated charcoal powder is 85% hot method food grade phosphoric acid according to sawdust by aged sawdust and concentration: hot method is eaten
Grade phosphoric acid=1: 1.4 weight ratio mixing, after being sufficiently stirred quiet stain, then activates through high temperature carbonization, recycle, rinse, drying, making
Powder forms.It is column or spherical particle activated carbon, and particle diameter and length general control are in particle diameter 2.0mm, length 3-6mm.
The present embodiment also proposes a kind of preparation method of wood activated charcoal, including two main processes, first process
For wood activated charcoal powder processed, comprise the following steps：
A, dispensing：The China fir sawdust after ageing is selected, its moisture control is 15%；Selection concentration is 85% hot method food
Level phosphoric acid, according to China fir sawdust: hot method food grade phosphoric acid=1: 1.4 ratio is mixed, after kneading stirs evenly and quiet stain 30 is divided
It is more than clock；
B, high temperature carbonization：295 DEG C of carbonization temperature, carbonization time 55 minutes；
C, activate：500 DEG C of activation temperature, soak time 63 minutes
D, rinse, dry：Wash away phosphoric acid and recycle, dry sawdust；
E, powder processed：Sawdust drying after drying, and beat and clay into power, cross 95% up to 300 mesh；
Second process is wood substance grain activated carbon processed, is comprised the following steps：
F, batch mixing: according to wood activated charcoal powder: organic sodium base bentonite: water=1: 0.25: 1.0 weight ratio, will have
In the wood activated charcoal powder that machine sodium base bentonite, water incorporation make, stir evenly three kinds of raw materials, mixing time is 40 minutes
More than；
G, it is granulated：Molding granulation is carried out with screw rod banded extruder or hydraulic pressure comminutor, it is 30%- to be dried after granulation to moisture
40%；
H, secondary physical activates：In the external-burning converter that particle after drying is put into, production temperature in burner hearth is warming up to
For 653 DEG C when, be passed through high-temperature water vapor and carry out re-activation, while be also passed through a certain amount of nitrogen；
I, cooling, screening：Sieved after carrying out the cooling of more than 30 minutes with cooler.
Preferably, in step " A, dispensing ", the China fir sawdust answers particle uniform, particle diameter 0.1-0.8mm, through two months
Above ripening；It using yellow phosphorus is raw material that thermal phosphoric acid, which is, and yellow phosphorus burning first is obtained phosphorus pentoxide and is water-cooled again
With absorption and manufactured phosphoric acid.
In step " F, batch mixing ", it is aqueous clay pit based on montmorillonite that organic sodium base bentonite, which is, and alkaline coefficient is big
In or equal to 1.
In step " H, secondary physical activation "；The temperature of vapor is 200 DEG C, air pressure 4.8MPa, intake 0.5-
0.8t/h, nitrogen addition are 1.6kg/h.
In step " H, secondary physical activation ", the heating combustion chamber of external-burning revolving burner is in the interlayer periphery of burner hearth, material
In the inner ring of burner hearth, the plenum space formed between the two across an interlayer.
In step " I, cooling, screening ", cooler is rotary chilling roll, and roller external application water spray is cooled down.
The foregoing is merely the preferred embodiment of the present invention, is not intended to limit the scope of the invention, every utilization
The equivalent structure transformation that present specification is made, is directly or indirectly used in other related technical areas, together
Reason is included within the scope of the present invention.
Claims (8)
1. a kind of wood substance grain activated carbon, it is characterised in that its primary raw material Ingredient Wt ratio is wood activated charcoal powder: organic
Sodium base bentonite: water=1: 0.2-0.25: 0.8-1.0, it is granulated after three kinds of raw materials are stirred evenly, granulation carries out physics after drying
It is made after activation, the wood activated charcoal powder is 85% hot method food grade phosphoric acid according to sawdust by aged sawdust and concentration
: hot method food grade phosphoric acid=1: the weight ratio mixing of 1.2-1.5, after being sufficiently stirred quiet stain, then activate through high temperature carbonization, recycle,
Rinse, dry, powder processed forms.
2. the efficient wood substance grain activated carbon according to claim 1 for automobile canister, it is characterised in that it is column
Or spherical particle activated carbon, particle diameter and length general control are in particle diameter 2.0mm, length 3-6mm.
A kind of 3. preparation method of the wood activated charcoal described in claim 1, it is characterised in that including two main processes,
First process is wood activated charcoal powder processed, is comprised the following steps：
A, dispensing：The China fir sawdust after ageing is selected, its moisture control is in 12-16%；Selection concentration is 85% hot method food
Level phosphoric acid, according to China fir sawdust: hot method food grade phosphoric acid=1: the ratio of 1.2-1.5 is mixed, kneading stir evenly rear and quiet stain
More than 30 minutes；
B, high temperature carbonization：250-300 DEG C of carbonization temperature, carbonization time 45-55 minutes；
C, activate：470-500 DEG C of activation temperature, soak time 55-65 minutes
D, rinse, dry：Wash away phosphoric acid and recycle, dry sawdust；
E, powder processed：Sawdust drying after drying, and beat and clay into power, cross 95% up to 300 mesh；
Second process is wood substance grain activated carbon processed, is comprised the following steps：
F, batch mixing：According to wood activated charcoal powder: organic sodium base bentonite: water=1: 0.2-0.25: 0.8-1.0 weight ratio,
In the wood activated charcoal powder that organic sodium base bentonite, water incorporation are made, stir evenly three kinds of raw materials, mixing time 40
More than minute；
G, it is granulated：Molding granulation is carried out with screw rod banded extruder or hydraulic pressure comminutor, it is 30%-40% to be dried after granulation to moisture；
H, secondary physical activates：In the external-burning converter that particle after drying is put into, it is 645 to be warming up to production temperature in burner hearth
At DEG C -655 DEG C, it is passed through high-temperature water vapor and carries out re-activation, while be also passed through a certain amount of nitrogen；
I, cooling, screening：Sieved after carrying out the cooling of more than 30 minutes with cooler.
4. the preparation method of wood activated charcoal according to claim 3, it is characterised in that described in step " A, dispensing "
China fir sawdust answered particle uniform, particle diameter 0.1-0.8mm, through more than two months ripenings；Thermal phosphoric acid is to be using yellow phosphorus
Raw material, first obtain phosphorus pentoxide by yellow phosphorus burning and are water-cooled and absorb and manufactured phosphoric acid again.
5. the preparation method of wood activated charcoal according to claim 3, it is characterised in that organic in step " F, batch mixing "
It is aqueous clay pit based on montmorillonite that sodium base bentonite, which is, and alkaline coefficient is greater than or equal to 1.
6. the preparation method of wood activated charcoal according to claim 3, it is characterised in that step " H, secondary physical activation "
In；The temperature of vapor is 180 DEG C -200 DEG C, air pressure 4-5MPa, intake 0.5-0.8t/h, and nitrogen addition is 1.4-
1.6kg/h。
7. the preparation method of wood activated charcoal according to claim 3, it is characterised in that step " H, secondary physical activation "
In, external-burning revolving burner heating combustion chamber burner hearth interlayer periphery, material burner hearth inner ring, between the two across one
The plenum space that interlayer is formed.
8. the preparation method of wood activated charcoal according to claim 3, it is characterised in that in step " I, cooling, screening ",
Cooler is rotary chilling roll, and roller external application water spray is cooled down.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109052399A (en) * | 2018-08-22 | 2018-12-21 | 贵州森环活性炭有限公司 | Clean the production method of low consumption activated carbon of phosphoric acid method |
| CN113651323A (en) * | 2021-08-04 | 2021-11-16 | 桂东县湘浙活性炭有限公司 | Production process of wood activated carbon |
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2017
- 2017-12-18 CN CN201711361276.2A patent/CN107986273A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109052399A (en) * | 2018-08-22 | 2018-12-21 | 贵州森环活性炭有限公司 | Clean the production method of low consumption activated carbon of phosphoric acid method |
| CN113651323A (en) * | 2021-08-04 | 2021-11-16 | 桂东县湘浙活性炭有限公司 | Production process of wood activated carbon |
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