CN105858650A - Method for manufacturing desulfurization denitration activated carbon by using waste activated carbon - Google Patents
Method for manufacturing desulfurization denitration activated carbon by using waste activated carbon Download PDFInfo
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a method for manufacturing desulfurization denitration activated carbon by using waste activated carbon. The method comprises the steps of grinding, mixing, pelleting, drying and regeneration. In the step of grinding, waste carbon is ground into powder, and the through put of the powder passing through a sieve of 180-240 meshes according to the grain fineness is 98%; in the step of mixing, 68-80% of waste activated carbon, 18-30% of tar and 2% of potassium hydroxide or magnesium oxide are prepared in percentage by weight; in the step of pelleting, the carbon paste is prepared into particles of which the particle diameter is 2-10mm; in the step of drying, the cylindrical particles are dried; and in the step of regeneration, the waste activated carbon cylindrical particles are added into an internal-heated rotary furnace for heating without air, the temperature is controlled between 820 and 900 DEG C, the time is 30-40 minutes, and water vapor is introduced into the furnace. According to the method, a powdery waste activated carbon source can be recycled, and can be recycled for four times or more after being treated by the process provided by the invention, and finally, the carbon with too high ash content can be recycled as sewage treatment carbon.
Description
Technical field
This invention relates generally to a kind of waste and old active carbon regenerating technology, in particular to a kind of profit
The method manufacturing desulphurization denitration activated carbon with waste and old activated carbon.
Background technology
In prior art, in the active carbon adsorption equipment of vent gas treatment, such as steel works sintering or have
The vent gas treatment active carbon adsorption equipment that color is metallurgical, can use a large amount of granular active carbon, these granules
Shaped activated carbon finally may utilize separating process regeneration and uses.But adsorption plant can be because rubbing between granule in running
Wipe or with neighbouring device or material friction, the waste and old activated carbon of substantial amounts of powder, generally these powder can be produced
The waste and old activated carbon of powder is taken as solid waste to process, or when fuel is burnt, and combustion heat value is the lowest,
Less than 3000 kilocalories, the recovery benefit of existing recovery process is the highest.
It addition, in prior art, the method that general new coal prepares desulphurization denitration activated carbon, including following step
Rapid: 1) prepare coal dust；2) preparation tar；3) carbon paste is manufactured；4) molding, granulating；5) carbonization；6) activation；
7) oxidation, makes graininess desulphurization denitration activated carbon with this.When utilizing new coal to prepare activated carbon granule, make
After material technique, in addition it is also necessary to carbonization, activating and aoxidize three steps, each step also needs to consume a large amount of energy
Source and water.If reclaiming with existing technique activated carbon waste and old to powder, cost may be higher than with
Prepared by new coal, so user still can use new coal to be prepared now.Therefore, it is necessary to improve for powder
The recovery activating process of the waste and old activated carbon of powder, to reduce cost recovery so that the waste and old activated carbon of powder
Recovery can the most really implement.
It is only used for strengthening the reason of the background to the present invention in information above-mentioned disclosed in described background section
Solving, therefore it can include not constituting the information to prior art known to persons of ordinary skill in the art.
Summary of the invention
Introducing the concept of a series of reduced form in Summary, this will be in detailed description of the invention
Part further describes.Present invention part is not meant to attempt to limit required guarantor
The key feature of the technical scheme protected and essential features, more do not mean that attempt to determine claimed
The protection domain of technical scheme.
One main purpose of the present invention is to overcome at least one defect of above-mentioned prior art, it is provided that one
It is waste and old that kind prepares utilizing of the desulphurization denitration activated carbon that compressive resistance intensity high, wear-resisting is high, desulfurized effect is good
Activated carbon manufactures the method for desulphurization denitration activated carbon.
For achieving the above object, the present invention adopts the following technical scheme that
According to an aspect of the invention, it is provided one utilizes waste and old activated carbon to manufacture desulphurization denitration activity
The method of charcoal, comprises the steps:
Step one: prepare active carbon adsorption equipment running the waste and old activated carbon of powder produced is raw material；
Step 2: pulverizing step, by waste and old activated carbon pulverizing, fineness of the particles is led to by 180 to 240 mesh sieves
Excess is 98%；
Step 3: blend step, prepare by weight waste and old activated carbon 68% to 80%, tar 18% to
30% with potassium hydroxide or magnesium oxide 2%, mixing apparatus is mixed into carbon paste；
Step 4: granulation step, makes particle diameter 2 to 10mm's with Granulation Equipments by above-mentioned carbon paste
Raw material shape granule；
Step 5: drying steps, dries or dries above-mentioned raw materials granule；
Step 6: regeneration step, adds an internal-heated rotary furnace by above-mentioned raw materials granule, and isolation air adds
Heat, temperature controls at 820 degrees Celsius to 900 degrees Celsius, 30 to 40 minutes time, and is passed through water steaming
Vapour；Above-mentioned raw materials granule internal-heated rotary furnace successively through feed space, prebake section, regeneration activating section,
Supplement activation section and discharge chamber；In regeneration activating section at interval of 5 to 8 minutes, from internal-heated rotary furnace stove
Wall leads to 1 to 2 minute flue gas containing carbon dioxide to reaction mass, and flue gas flow controls in total air inflow
40 to 60%；
Step 7: screening packaging obtains finished product.
Another aspect of the present invention, it is provided that another kind utilizes waste and old activated carbon to manufacture desulphurization denitration activated carbon
Method, comprises the steps:
Step one: prepare active carbon adsorption equipment running the waste and old activated carbon of powder produced is raw material；
Step 2: pulverizing step, by waste and old activated carbon pulverizing, fineness of the particles is led to by 180 to 240 mesh sieves
Excess is 98%；
Step 3: blend step, prepare by weight waste and old activated carbon 68% to 80%, tar 18% to
30% with potassium hydroxide or magnesium oxide 2%, mixing apparatus is mixed into carbon paste；
Step 4: granulation step, makes particle diameter 2mm to 10mm with Granulation Equipments by above-mentioned carbon paste
Feed particles；
Step 5: drying steps, dries or dries above-mentioned raw materials granule；
Step 6: regeneration step, adds a saddle activation furnace by above-mentioned raw materials granule, and isolation air heats,
Feed particles reaction temperature controls at 880 degrees Celsius to 960 degrees Celsius, and the control of regeneration activating time is 8
To 12 hours；Above-mentioned raw materials granule the most preheated band of saddle activation furnace, supplement carbide bound, live again
Change band and cooling zone；At interval of 5 to 8 minutes, lead to 1 from supplementary carbide bound air inlet to reaction mass
To 2 minutes flue gases containing carbon dioxide, flue gas flow controlled in the 40 to 60% of total air inflow；
Step 7: screening packaging obtains finished product.
As shown from the above technical solution, the waste and old activated carbon that utilizes of the present invention manufactures desulphurization denitration activated carbon
The advantage of method and having the active effect that
Utilize the waste and old activated carbon of powder, after prilling, only need to carry out the short time at activation equipment
Regeneration, can prepare desulphurization denitration activated carbon product, can reduce carbonization and two techniques of oxidation, can
To be greatly saved the consumption of the energy and time.This technique can by waste and old for powder activated carbon recycling,
The waste and old activated carbon of powder can utilize more than 4 times through this PROCESS FOR TREATMENT Posterior circle, not only improves economy
Benefit, also realizes the effect that danger wastes reduces discharging, has accomplished the unification of environmental benefit and social benefit.
Technique leading portion pulsed pours containing carbon dioxide (CO2) flue gas, mixing two gas carrier
Sulfide in waste and old activated carbon is desorbed, sulfide in the waste and old activated carbon of powder can be greatly improved
Desorption efficiency, and add after can't increase holistic cost.
Accompanying drawing explanation
By being considered in conjunction with the accompanying following the following detailed description of the embodiment of the present invention, the present invention's is each
Plant target, feature and advantage will become apparent from.
Fig. 1 is to utilize waste and old activated carbon to manufacture desulphurization denitration according to the one shown in an illustrative embodiments
The block diagram of the method for activated carbon.
Fig. 2 is that the structure according to a kind of saddle activation furnace shown in an illustrative embodiments is launched and utilizes
Waste and old activated carbon manufactures desulphurization denitration activated carbon process step schematic diagram.
Detailed description of the invention
It is described more fully with example embodiment referring now to accompanying drawing.But, example embodiment can
Implement in a variety of forms, and be not understood as limited to embodiment set forth herein；On the contrary, it is provided that this
A little embodiments make the present invention will fully and completely, and the design of example embodiment are passed on all sidedly
To those skilled in the art.Reference identical in figure represents same or similar structure, thus will
Omit their detailed description.
With reference to shown in Fig. 1, embodiments provide one and utilize waste and old activated carbon to manufacture desulphurization denitration
The method of activated carbon, comprises the steps:
One, prepare active carbon adsorption equipment running the powder waste and old activated carbon S01 produced is raw material；
Two, pulverizing step S02, by waste and old activated carbon pulverizing, fineness of the particles can be controlled in by 180 to 240
Mesh sieve throughput is 98%；
Three, blend step S03, prepare by weight waste and old activated carbon 68% to 80%, tar 18% to
30% with potassium hydroxide or magnesium oxide 2%, mixing apparatus is mixed into carbon paste；It is, of course, also possible to select
Add the water of above material gross weight about 5-18%.
Four, granulation step S04, makes particle diameter 2 to 10mm's with Granulation Equipments by above-mentioned carbon paste
Feed particles；
Five, drying steps S05, dries or dries above-mentioned raw materials granule, when being chosen as drying, dries temperature
Degree can be controlled in 90 to 150 degrees Celsius, dries 1 hour；
Six, regeneration step S06, adds an internal-heated rotary furnace by above-mentioned raw materials granule, and isolation air adds
Heat, temperature controls at 820 degrees Celsius to 900 degrees Celsius, 30 to 40 minutes time, and is passed through water steaming
Vapour regenerates；Above-mentioned raw materials granule at internal-heated rotary furnace successively through feed space, prebake section, regeneration
Activation section, supplementary activation section and discharge chamber；In regeneration activating section at interval of 5 to 8 minutes, from internal heat type
Rotary furnace furnace wall leads to 1 to 2 minute flue gas containing carbon dioxide to reaction mass, and flue gas flow controls
The 40 to 60% of total air inflow；
Seven, screening packaging obtains finished product S07.
Pulsed pours containing carbon dioxide (CO2) flue gas, mixing two gas carrier is to waste and old work
Property charcoal in sulfide be desorbed, can be greatly improved sulfide in the waste and old activated carbon of powder desorption effect
Holistic cost can't be increased after rate, and addition.
Use the oxygen-containing gas such as water vapour, flue gas or its mixed gas as activator, at high temperature with
Feed particles contacts, and occurs desorption reaction to occur redox reaction to carry out active regeneration simultaneously, generates one
Carbonoxide, carbon dioxide, hydrogen and other hydrocarbon gas, reached by the gasification reaction of carbon
The purpose of pore-creating in carbon granules.Its main chemical reactions formula is as follows:
C+2H2O→2H2+CO2—18kcal……………………①
C+H2O→H2+CO—31kcal……………………②
CO2+C→2CO—41kcal……………………③
Above three chemical reaction is all the endothermic reaction, i.e. along with the carrying out of reaction, internal-heated rotary furnace
Conversion zone temperature will progressively decline, if the temperature of conversion zone is less than 800 DEG C, and above-mentioned regenerative response
Cannot be normally carried out, thus the conversion zone of internal-heated rotary furnace need to be passed through simultaneously partial air with
The gas-fired additional heat that reflection produces, or by supplementary external heat source, to ensure the temperature of conversion zone
Degree.
Wherein increase potassium hydroxide or magnesium oxide, can be greatly improved sulfide in the waste and old activated carbon of powder,
Desorption efficiency, and add after can't increase holistic cost.
The embodiment of the present invention uses steel works sintering, nonferrous metallurgy tail gas activated carbon method abatement equipment to run and produces
The raw waste and old activated carbon of powder, through secondary pulverizing, molding, dries, completely cuts off air and heat and be passed through
Water vapour, screening packaging obtain finished product.Finished product has compressive resistance intensity high, wear-resisting height, desulfurized effect
Good feature.
What the present invention had now been found that be mainly characterized by 1, raw material is different from prior art；2, need not carbonization
Technique.Through the activated carbon that this technique manufactures, there is desulphurizing ability good (more than 22mg), compressive resistance
Good (more than 42kg/cm2), the advantage of wear-resisting intensity good (more than 97%).
According to an embodiment of the present invention, in wherein said granulation step, optional use hydraulic press formula
Granulation Equipments, this hydraulic press formula Granulation Equipments master cylinder pressure is optional to be controlled at 80 to 260Mpa, master cylinder
Stroke is optional to be controlled at 300 to 1000cm；During pelletize is carried out, optional control is with 0.05m/s extremely
0.09m/s speed piston first presses three/one stroke, stops 10 to 20 seconds, and piston returns peak secondary again
Filler, then it is pressed onto the end with the speed of 0.05m/s-0.09m/s.
According to an embodiment of the present invention, wherein in blend step, the main chamber of mixing of mixing apparatus is optional
Select and be provided with chuck, in chuck, be passed through the cooling water of 5 to 20 degrees Celsius.Prevent material plug-hole in a mold,
It is also possible to prevent mixer to freeze in winter.
According to an embodiment of the present invention, wherein in described blend step, optional by weight accurate
Standby following material: bituminous coal 4-6%, waste and old activated carbon 62-78%, Colophonium 3-7%, coking coal 5-8%, Jiao
Oil 8-15% and potassium hydroxide or magnesium oxide 2%, be mixed into carbon paste in mixing apparatus.
According to an embodiment of the present invention, wherein in described granulation step, described Granulation Equipments is optional
Selecting employing flat die rolling granulator, the material added in flat die rolling granulator extrudes through running roller, is forced
Extruding from perforate flat-die, the cylindrical pellet of extrusion is cut off by scraper outside template outlet, thus is justified
Cylindrical particle, described flat die rolling granulator briquetting pressure 10 to 25Mpa, particle diameter 2 to 10mm,
Granulating rate >=95%.
According to an embodiment of the present invention, in wherein said baking step, optional use Analytic Tower heat
The hot-air of wind furnace carries out forcing to dry, and enters entering described internal-heated rotary furnace burner with hot blast
Row air heat-exchange preheats.To reach energy-conservation effect.
According to an embodiment of the present invention, in wherein said regeneration step, for being passed through the steaming of water vapour
Steam pipe road, the optional combustor first passing through described internal-heated rotary furnace carries out heat exchange, and preheating is warmed to 800
More than degree Celsius, then enter described internal-heated rotary furnace by swivel joint from central axis.
According to an embodiment of the present invention, the steam loop of wherein said internal-heated rotary furnace separates many
Individual arm, each arm fills one and taps valve and bypass tubule, and under tapping valve function, shower nozzle buries
Opening percussion valve time in pan feeding, shower nozzle is closed the when of leaving material and is tapped valve.
As it has been described above, the embodiment of the present invention uses pelleting by semidry method, two ways can be used for example:
A. equipment is optional uses flat die rolling granulator, and the material in addition machine extrudes through running roller, by by force
Making and extrude from steel perforate flat-die, the cylindrical pellet of extrusion is cut off by scraper below template, thus
To cylindrical pellet, briquetting pressure 10-25Mpa.Particle diameter 2-10mm, granulating rate >=95%.
Raw material ratio: bituminous coal: the waste and old activated carbon of powder: Colophonium: coking coal: tar
=5%:70%:5%:8%:12%.
It is, of course, also possible to select to add the water of above material gross weight about 8%.
Feature: shaping efficiency is high, and binder dosage is few.
B. hydraulic press pelletize is used.Hydraulic press be a kind of by specific hydraulic fluid as working media, logical
Cross hydraulic workstation as power source, make hydraulic oil be entered by fluid pressure line by the active force of pump in work station
Enter oil cylinder piston, the compound within Squeezinggranulator, it is achieved molding.
Pressure: 80-260Mpa
Stroke: 300-1000cm
Technique: first press three/one stroke with 0.05m/s-0.09m/s speed piston, stop the 10-20 second, lives
Peak secondary filler again return by plug, then 0.05m/s-0.09m/s is pressed onto the end.
The feature of the internal-heated rotary furnace used in the above embodiment of the present invention:
1. jet chimney first passes through combustor and carries out heat exchange, and preheating is warmed to more than 800 degrees Celsius, then leads to
Cross swivel joint therefrom mandrel line and enter stove, be then divided into four tunnels outside stove, avoid furnace high-temperature region,
Receive steam loop.The outer steam pipework of stove is all incubated.
2. separating 8-14 arm on steam loop, each arm fills one and taps valve and bypass tubule,
Under tapping valve function, opening percussion valve time in shower nozzle embedment material, shower nozzle is closed the when of leaving material
Tap valve.Bypass tubule maintains relatively low steam flow after shower nozzle leaves material.
3. steam jet uses heat-and corrosion-resistant cast iron, and installs outside stove, and maintenance is convenient, service life
Long.
4. external thermal insulation in body of heater, furnace interior uses castable refractory insulation, outside use ceramic fibre to protect
Temperature, more than thickness 10cm, reach energy-conservation effect.
Advantage: realizing penetration reaction, allow steam be fully contacted with material, recovering the adsorption activity time can
To be reduced to 30-40 minute from the 1 of traditional handicraft hour, 70% steam can be saved, improve activated carbon
Product yield 10%-15%.Steam pipe is placed on outside stove and can reduce thermal deformation, be greatly prolonged use
Life-span.Control valve and the use of bypass tubule, be possible to prevent shower nozzle to block, increase the service life, subtract
Little maintenance load.
Can be with modularity.Conventional carbon regeneration equipment volume is relatively big, is typically placed in activated carbon factory, this
Invent described equipment can be placed near sintered production line with flexible combination.By current price and
Labour force's level of production, per ton than conventionally produced product cost reduction by more than 20%.
Activated carbon after pelletize is carried out forcing to dry by the hot-air using Analytic Tower air stove, and uses hot blast
With the air heat-exchange entering burner.
The waste and old activated carbon of powder can be with circular regeneration more than 4 times.After 4 regeneration, the work that ash is higher
Property charcoal product be also used as water process charcoal be continuing with.
Following three embodiment presented below and a prior art comparative example, and the corresponding property of corresponding offer
Can Experiment Parameter result contrast.
Embodiment 1:
Desulphurization denitration activated carbon in the present embodiment, it is made up of the waste and old activated carbon of powder, tar and water,
Its percentage by weight is:
The waste and old activated carbon of powder 70%；Tar 23%；Potassium hydroxide or magnesium oxide 2%；Water 5%.
Here tar uses high temperature coal-tar.
The manufacture method of above-mentioned activated carbon is: it comprises the following steps:
1), raw material is prepared: grind to form the waste and old activated carbon of powder of 200 mesh；
2), preparation tar: first tar temperature is adjusted to 55 DEG C, then stir, then by tar
It is configured to blended tars that bitumen content is 50% and makes its temperature be maintained at 55 DEG C；
3), carbon paste is manufactured: the tar that by waste and old for the powder of preparation activated carbon, prepares, potassium hydroxide
Or magnesium oxide and water are added to stir in mixer by above-mentioned percentage by weight and make carbon paste；
4), molding, granulating: by the carbon paste made feeding pressure be 20Mpa forming machine in make cylindric
Strip particle；Can be selected for the three general or comminutors of beautiful good fortune machinery.
5), baking step, dry above-mentioned cylindrical pellet, dry temperature 90 degrees Celsius, dry 1 hour；
6), regeneration pore-creating: finish mix is added temperature be 800 DEG C, pressure be that the internal heat type of 50Pa returns
In converter, within 40 minutes, come out of the stove with the water vapour pore-creating that temperature is 840 DEG C, make desulphurization denitration activated carbon.
In regeneration activating section at interval of 5 minutes, lead to 1 minute to reaction mass from internal-heated rotary furnace furnace wall and contain
The flue gas of carbon dioxide, flue gas flow controls in the 50% of total air inflow.
Embodiment 2:
Desulphurization denitration activated carbon in the present embodiment, it is made up of the waste and old activated carbon of powder, tar and water,
Its percentage by weight is:
The waste and old activated carbon of powder 75%；Tar 15%；Water 8%；Potassium hydroxide or magnesium oxide 2%.
Coal tar uses high temperature coal-tar.
The manufacture method of above-mentioned activated carbon is: it comprises the following steps:
1), raw material is prepared: grind to form the waste and old activated carbon of powder of 240 mesh；
2), preparation tar: first tar temperature is adjusted to 50 DEG C, then stir, then by tar
It is configured to blended tars that bitumen content is 60% and makes its temperature be maintained at 50 DEG C；
3), carbon paste is manufactured: the tar that by waste and old for the powder of preparation activated carbon, prepares, potassium hydroxide
Or magnesium oxide and water are added to stir in mixer by above-mentioned percentage by weight and make carbon paste；
4), molding, granulating: the carbon paste made is sent in the press formula Granulation Equipments that pressure is 150Mpa
Make cylindrical pellet.
5), baking step, dry above-mentioned cylindrical pellet, dry temperature 150 degrees Celsius, dry 1 little
Time；
6), regeneration pore-creating: by the carbon paste made addition temperature be 800 DEG C, pressure be the interior-heat of 100Pa
Formula rotary furnace, comes out of the stove with the water vapour pore-creating that temperature is 970 DEG C, makes desulphurization denitration activated carbon for 35 minutes.
In regeneration activating section at interval of 7 minutes, lead to 2 minutes to reaction mass from internal-heated rotary furnace furnace wall and contain
The flue gas of carbon dioxide, flue gas flow controls in the 55% of total air inflow.
Embodiment 3:
Desulphurization denitration activated carbon in the present embodiment, it is made up of the waste and old activated carbon of powder, tar and water,
Its percentage by weight is:
Bituminous coal 5%, waste and old activated carbon 68%, Colophonium 5%, coking coal 8%, potassium hydroxide or magnesium oxide 2%
With tar 12%.
Use the ground such as Qinyuan, Xiangyuan coking coal, it is desirable to caking index 75-95；Bituminous coal uses Jurassic Period long flame
Coal, high temperature coal-tar, ature of coal modified pitch.
The manufacture method of above-mentioned activated carbon is: it comprises the following steps:
1) raw material, is prepared: first bituminous coal, coking coal are broken into the coal cinder less than 12mm respectively, then
After bituminous coal and coking coal being coordinated by above-mentioned percentage by weight, then activated carbon co-ground waste and old with powder becomes
The powder of 220 mesh；
2), preparation tar: first tar temperature is adjusted to 85 DEG C, then stir, then by tar
It is configured to blended tars that bitumen content is 72% and makes its temperature be maintained at 85 DEG C；
3), manufacture carbon paste: by preparation the waste and old activated carbon of powder, bituminous coal, coking coal, potassium hydroxide or
Magnesium oxide, the tar prepared are added to stir in mixer by above-mentioned percentage by weight makes carbon paste；
4), molding, granulating: the carbon paste made is sent in the forming machine that pressure is 16Mpa and makes strip
Grain；Select the three general or comminutors of beautiful good fortune machinery.
5), baking step, dry above-mentioned cylindrical pellet, dry temperature 120 degrees Celsius, dry 1 little
Time；
6), regeneration pore-creating: finish mix is added temperature be 910 DEG C, pressure be the internal heat type of 150Pa
Rotary furnace, comes out of the stove with the water vapour pore-creating that temperature is 1100 DEG C, makes desulphurization denitration activated carbon for 30 minutes.
In regeneration activating section at interval of 8 minutes, lead to 2 minutes to reaction mass from internal-heated rotary furnace furnace wall and contain
The flue gas of carbon dioxide, flue gas flow controls in the 60% of total air inflow.
In above-described embodiment, general working condition is, steam consumes 1t-1.8t per hour；Natural gas is every
Hour consume 100m3；Energy consumption is the most temporally calculated, if process time, short energy consumption had reduction.
Comparative example:
Desulphurization denitration activated carbon in comparative example, it is made up of coal dust, tar and water, its percentage by weight
For:
Coal dust 70%, tar 25%, water 5%.
This coal dust is made up of bituminous coal and coking coal, and its percentage by weight is:
Bituminous coal 60%, coking coal 40%.
The manufacture method of this activated carbon is: it comprises the following steps:
1) coal dust, is prepared: first bituminous coal, coking coal are broken into the coal cinder less than 12mm respectively, then
After bituminous coal and coking coal being coordinated by above-mentioned percentage by weight, then grind to form the coal dust of 300 mesh；
2), preparation tar: first tar temperature is adjusted to 55 DEG C, then stir, then by tar
It is configured to blended tars that bitumen content is 50% and makes its temperature be maintained at 55 DEG C；
3), coal cream is manufactured: the tar and the water that by the coal dust of preparation, prepare are added by above-mentioned percentage by weight
Entering stirs in mixer makes coal cream；
4), molding, granulating: the coal cream made is sent in the forming machine that pressure is 10Mpa and makes strip
Grain；
5), carbonization: the granule of molding is added in the retort that inlet temperature is 300 DEG C, carbonization temperature
Being risen to 800 DEG C by 300 DEG C, carbonization is come out of the stove for 3 hours, makes carbonized material；
6), activation: by the carbonized material made addition temperature be 700 DEG C, pressure be 50Pa activation furnace in,
Within 3 hours, come out of the stove with the steam activation that temperature is 840 DEG C, make tax material alive；
7), oxidation: the tax that make material of living is added in oxidation furnace, in stove oxygen content be 16%, furnace temperature
When being 400 DEG C, oxidation is constructed to the activated carbon of desulphurization denitration for 2 hours.
In above-described embodiment, the waste and old activated carbon of powder does activated carbon test portion data
Existing desulphurization denitration activated carbon technology parameter mean level is as follows, desulfurization value ratio relatively low 15, typically
17-18, higher can be more than 20；Compressive resistance typically requires more than 35；Wear-resisting intensity 96
The most qualified above.
Saddle activation furnace embodiment
With reference to shown in Fig. 2, embodiments provide one and utilize waste and old activated carbon to manufacture desulphurization denitration
The method of activated carbon, wherein with the difference of previous embodiment at least that, use saddle in regeneration step S06
Formula activation furnace carries out regeneration activating.
In the embodiment of the present invention, saddle activation furnace body of heater may be selected to be rectangular body, and size can for example
For length × width × height=14678mm × 10594mm × 13202mm, exterior wall 370mm Rhizoma Begoniae Willsonii is built into, interior
Lining 350mm chamotte brick, optional filling alumina silicate fiber felt between red wall and inner lining refractory block
40mm, heat-insulation and heat-preservation.
Fig. 2 is that the structure according to a kind of saddle activation furnace shown in an illustrative embodiments is launched and utilizes
Waste and old activated carbon manufactures desulphurization denitration activated carbon process step schematic diagram.As in figure 2 it is shown, saddle activation furnace
Specifically include that left regenerator 1, left half stove 2, lower even flue 3, right half stove 4, right regenerator 5, cigarette
Road 6 and chimney 7.Burner hearth of the furnace body middle can select fire clay brick wall thick for 464mm to be divided into by stove
Left half stove 1 and right half stove 4.Full stove can about 50 tons of charging feedstock charcoal material.
Flue (commonly referred to as side flue) can be formed with between left half stove 2 and furnace wall and the burner hearth of right half stove 4,
Flue can be divided into upper nearly flue by front arch, upper remote flue, middle part flue, lower remote flue, lower nearly flue,
These side flues can be activating and regenerating dominant response district, and between furnace wall and burner hearth, high temperature can be well
Keep.
A kind of selection is, for ensureing that fuel gas fully burns in flue, to maintain activation furnace temperature,
Upper remote flue, middle part flue, lower remote flue may select and offer multiple air air distribution outlet 24,44,
To be passed through appropriate air from outside.
In activation furnace bottom, left half stove 2 is connected by lower even flue 3 (combustor) with right half stove 4, under
Connect flue 3 and be provided with air inlet.Flue 12,52 is connected respectively by left half stove 2 and right half stove 4 on two
Connecting with left regenerator 1 and right regenerator 5, upper even flue 12,52 top is again provided with air inlet.
In order to overhaul conveniently, being provided with 12 manholes on body of heater, manhole is built by laying bricks or stones on front arch.People
The position in hole is provided with thermocouple and observation port, is provided with pressure-measuring pipe on lower remote flue.Activation furnace also can be joined
It is provided with water seal, discharger, air feed system, cooling system, device for recovering tail gas etc..Can after tail gas recycle
For baking step S05.
Left half stove 2 and right half stove 4 divide from top to bottom can be mainly four bands, respectively preheating zone 21, benefit
Fill carbide bound 22, regeneration activating band 23 and cooling zone 25.
Preheating zone 21, may select and be built into by common chamotte brick, and size can be high 1632mm for example
Left and right.Discharging volume 35m3, feed particles about 22 tons can be filled.Its effect: 1. load enough
Feed particles, in order to the timing feeding operation of activation furnace；2. preheating material granule so that it is slowly heat up.
Supplementing carbide bound 22, may select and be built into by special quarl, size can be high for example
1230mm.Here feed particles is not directly contacted with activator, by high temperature gas flow heating special shaped brick and incite somebody to action
Heat radiates to feed particles so that it is supplement carbonization.
Regeneration activating band 23, may select and built up by 60 layers of special shape chamotte brick, size for example
Can be high 6.0m.At regeneration activating band 23 feed particles and the direct contact activation of activator, activator (this
In be chosen as water vapour) penetrated in layer of charcoal by air flue diffusion, with charcoal generation series of chemical, make
Charcoal forms the pore structure of prosperity and huge specific surface area.
Cooling zone 25, optional is also to be built up by special shape chamotte brick, and size can be high for example
1330mm.No longer contact with furnace gas but pyrocarbon material progressively cooling down at cooling zone charcoal granule, with
Exempt to unload come out of the stove outer charcoal material at high temperature with air generation combustion reaction and affect the quality of charcoal and activate
Rate.
Wherein, forward adds activator (water vapour) and carries out activation act, because priming reaction process needs
Half stove absorbed heat and cause furnace temperature to be gradually reduced referred to as cooling half stove；Meanwhile, adding flammable
Gas and air are to react by gas fuel burning and to consume the carbonaceous (carbon in a small amount of solid material simultaneously
Combustion reaction) so that half stove that gradually rises of furnace temperature referred to as heating half stove.
Carry out, as a example by regeneration activating operation (the most left half stove 2 is for cooling half stove), closing a left side by left half stove 2
The flue gate valve of half stove 2 and the total butterfly valve of air, open steam valve 11, is added by bottom left regenerator 1
The water vapour of 130～150 DEG C, from bottom to top, through left regenerator 1 body of wall and checker brick, absorbs and stores up
The heat deposited, to left regenerator 1 top, water vapour is superheated to about 1000～1100 DEG C, through upper even cigarette
Road 12 enters into left half stove 2, carries out activation from top to bottom, and feed particles reaction temperature can control
At 880 DEG C to 960 DEG C.After high-temperature steam enters left half stove 2, it then follows following route runs in stove: on
The even lower near flue of flue → upper nearly flue → upper remote flue → middle part flue → lower remote flue → right half stove 4
The upper company of flue → lower nearly flue → lower remote flue → middle part flue → upper nearly flue → right half stove 4 is connected under →
Flue (add secondary wind make gas fuel burning), the high-temperature gas mixture of generation flows through regenerator from upper
Producing heat exchange with checker brick, temperature is down to 300～400 DEG C by 1000～1100 DEG C, and gas is by cigarette lowerly
Road 6 to chimney 7 is drained.Handover operation is carried out, flowing through of steam after reaching the operating interval time set
Direction is in opposite direction with above-mentioned.So circulation, repeated multiple times carry out, make feed particles by regeneration activating.
In the embodiment of the present invention, because belonging to the activation of waste and old regenerating active carbon, may select and only use left half stove
2 carry out regeneration activating operation, owing to left half stove 2 is cooling half stove, and feed particles and water vapour or
Flue gas is following current, so, response time and temperature can meet the needs of the embodiment of the present invention.Right half stove 4
Can be used for the activation processing of other material.And in the embodiment of the present invention, at interval of 5 to 8 minutes, from benefit
Fill carbide bound air inlet and lead to 1 to 2 minute flue gas containing carbon dioxide, flue gas flow control to reaction mass
System is in the 40 to 60% of total air inflow；Pulsed pours carbon dioxide (CO2), mixing two gas carries
Sulfide in waste and old activated carbon is desorbed by body, can be greatly improved in the waste and old activated carbon of powder sulfuration
Thing desorption efficiency, and holistic cost can't be increased after addition.
Existing saddle activation furnace is fed to discharging (containing preheating, supplementing carbonization) 24 hours average times, main
Soak time 6～8 hours.
In the embodiment of the present invention, because belonging to the activation of waste and old regenerating active carbon, therefore there is fireballing advantage,
This point test of many times confirms, fast 2～2.5 times of speed, main soak time can raise speed little to 3-4
Time.Can control at 8 to 12 hours from the time being fed to discharging.The energy and time can be greatly saved
Consume.The embodiment of the present invention use saddle activation furnace time, the iodine sorption value of the product of preparation up to
400～480mg/g.
As shown from the above technical solution, the waste and old activated carbon that utilizes of the present invention manufactures desulphurization denitration activated carbon
The advantage of method and having the active effect that
Utilize the waste and old activated carbon of powder, after prilling, only need to carry out the short time at activation equipment
Regeneration, can prepare desulphurization denitration activated carbon product, can reduce carbonization and two techniques of oxidation, can
To be greatly saved the consumption of the energy and time.This technique can by waste and old for powder activated carbon recycling,
The waste and old activated carbon of powder can utilize more than 4 times through this PROCESS FOR TREATMENT Posterior circle, not only improves economy
Benefit, also realizes the effect that danger wastes reduces discharging, has accomplished the unification of environmental benefit and social benefit.
Although disclosing the present invention with reference to some embodiment, but without departing substantially from the scope of the present invention and
On the premise of category, described embodiment can be carried out multiple variants and modifications.It will therefore be appreciated that
The invention is not limited in illustrated embodiment, its protection domain should be by the content of claims
And the structure of equivalence and scheme limit.
Claims (10)
1. one kind utilize waste and old activated carbon manufacture desulphurization denitration activated carbon method, it is characterised in that include as
Lower step:
Step one: prepare active carbon adsorption equipment running the waste and old activated carbon of powder produced is raw material；
Step 2: pulverizing step, by waste and old activated carbon pulverizing, fineness of the particles is passed through by 180 to 240 mesh sieves
Amount is 98%；
Step 3: blend step, prepare by weight waste and old activated carbon 68% to 80%, tar 18% to
30% with potassium hydroxide or magnesium oxide 2%, mixing apparatus is mixed into carbon paste；
Step 4: granulation step, makes particle diameter 2mm to 10mm with Granulation Equipments by above-mentioned carbon paste
Feed particles；
Step 5: drying steps, dries or dries above-mentioned raw materials granule；
Step 6: regeneration step, adds an internal-heated rotary furnace by above-mentioned raw materials granule, and isolation air heats,
Feed particles reaction temperature controls at 820 degrees Celsius to 900 degrees Celsius, 30 to 40 minutes time；And lead to
Enter water vapour, above-mentioned raw materials granule at internal-heated rotary furnace successively through feed space, prebake section, regeneration activating
Section, supplementary activation section and discharge chamber；In regeneration activating section at interval of 5 to 8 minutes, from internal-heated rotary furnace
Furnace wall leads to 1 to 2 minute flue gas containing carbon dioxide to reaction mass, and flue gas flow controls in total air inflow
40 to 60%；
Step 7: screening packaging obtains finished product.
Utilizing the method that waste and old activated carbon manufactures desulphurization denitration activated carbon the most as claimed in claim 1, it is special
Levy and be, in described granulation step, use hydraulic press formula Granulation Equipments, this hydraulic press formula Granulation Equipments master cylinder
Pressure is at 80 to 260Mpa, and main-cylinder stroke is at 300 to 1000cm；During pelletize is carried out, with 0.05m/s
First pressing three/one stroke to 0.09m/s speed piston, stop 10 to 20 seconds, piston returns peak again two
Secondary filler, then it is pressed onto the end with the speed of 0.05m/s-0.09m/s.
Utilizing the method that waste and old activated carbon manufactures desulphurization denitration activated carbon the most as claimed in claim 1, it is special
Levying and be, in described blend step, the main chamber of mixing of described mixing apparatus is provided with chuck, is passed through 5 in chuck
To the cooling water of 20 degrees Celsius.
Utilizing the method that waste and old activated carbon manufactures desulphurization denitration activated carbon the most as claimed in claim 1, it is special
Levy and be, in described blend step, prepare following material by weight: bituminous coal 4-6%, waste and old activity
Charcoal 62-78%, Colophonium 3-7%, coking coal 5-8% and tar 8-15% and potassium hydroxide or magnesium oxide 2%,
Mixing apparatus is mixed into carbon paste.
Utilizing the method that waste and old activated carbon manufactures desulphurization denitration activated carbon the most as claimed in claim 4, it is special
Levying and be, in described granulation step, described Granulation Equipments uses flat die rolling granulator, adds flat-die and grinds
Material in pressure comminutor extrudes through running roller, is forced to extrude from perforate flat-die, and the cylindrical pellet of extrusion exists
Template outlet is outer to be cut off by scraper, thus obtains cylindrical pellet, described flat die rolling granulator briquetting pressure
10 to 25Mpa, particle diameter 2 to 10mm, granulating rate >=95%.
6. the waste and old activated carbon that utilizes as described in any one of claim 1 to 5 manufactures desulphurization denitration activated carbon
Method, it is characterised in that in described drying steps, uses the hot blast of Analytic Tower air stove to carry out forcing to dry,
And with this hot blast, the air heat-exchange entering described internal-heated rotary furnace burner is preheated.
7. the waste and old activated carbon that utilizes as described in any one of claim 1 to 5 manufactures desulphurization denitration activated carbon
Method, it is characterised in that in described regeneration step, first passes through described for being passed through the jet chimney of water vapour
The combustor of internal-heated rotary furnace carries out heat exchange, and preheating is warmed to more than 800 degrees Celsius, then is connect by rotation
Head enters described internal-heated rotary furnace from central axis.
8. one kind utilize waste and old activated carbon manufacture desulphurization denitration activated carbon method, it is characterised in that include as
Lower step:
Step one: prepare active carbon adsorption equipment running the waste and old activated carbon of powder produced is raw material；
Step 2: pulverizing step, by waste and old activated carbon pulverizing, fineness of the particles is passed through by 180 to 240 mesh sieves
Amount is 98%；
Step 3: blend step, prepare by weight waste and old activated carbon 68% to 80%, tar 18% to
30% with potassium hydroxide or magnesium oxide 2%, mixing apparatus is mixed into carbon paste；
Step 4: granulation step, makes particle diameter 2mm to 10mm with Granulation Equipments by above-mentioned carbon paste
Feed particles；
Step 5: drying steps, dries or dries above-mentioned raw materials granule；
Step 6: regeneration step, adds a saddle activation furnace by above-mentioned raw materials granule, and isolation air heats,
Feed particles reaction temperature controls at 880 degrees Celsius to 960 degrees Celsius, the regeneration activating time control be 8 to
12 hours；Above-mentioned raw materials granule is at the most preheated band of saddle activation furnace, supplementary carbide bound, regeneration activating
Band and cooling zone；At interval of 5 to 8 minutes, lead to 1 to 2 from supplementary carbide bound air inlet to reaction mass
Minute containing the flue gas of carbon dioxide, flue gas flow controls in the 40 to 60% of total air inflow；
Step 7: screening packaging obtains finished product.
Utilizing the method that waste and old activated carbon manufactures desulphurization denitration activated carbon the most as claimed in claim 8, it is special
Levy and be, in described drying steps, use aforementioned saddle activatory furnace exhaust gas to carry out forcing to dry, and use tail gas
To the air heat-exchange preheating entering described saddle activation furnace burner.
Utilize the method that waste and old activated carbon manufactures desulphurization denitration activated carbon the most as claimed in claim 8 or 9,
It is characterized in that, described saddle activation furnace includes: left regenerator, Zuo Banlu, lower even flue, right half stove,
Right regenerator, flue and chimney；
Can be formed with side flue between described left half stove and furnace wall and the burner hearth of right half stove, described side flue is covered
Plate brick is divided into nearly flue, upper remote flue, middle part flue, lower remote flue and lower nearly flue, described side flue
It can be activating and regenerating dominant response district；
In described activation furnace bottom, described left half stove and right half stove connect by once connecting flue, described lower even cigarette
Road is also provided with air inlet；To connect flue on two respectively by described left half stove and right half stove and left regenerator and the right side
Regenerator connects, and described upper even flue top is provided with air inlet；
Described left half stove forward adds activator and carries out activation act, described left half stove regeneration activating course of reaction
Furnace temperature is gradually reduced；Described regeneration step only uses described left half stove to carry out regeneration activating operation, described raw material
Granule and activator gas are following current.
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| CN107597086A (en) * | 2017-10-24 | 2018-01-19 | 湖北君集水处理有限公司 | A kind of Powdered Activated Carbon regenerative system and method for being used to reduce dust pollution |
| CN107827109A (en) * | 2017-10-18 | 2018-03-23 | 北京国电富通科技发展有限责任公司 | Powdered Activated Carbon regenerative system and preparation method |
| CN108584953A (en) * | 2018-06-07 | 2018-09-28 | 李子臻 | A kind of method and apparatus that the regeneration of Industry Waste carbon dust prepares activated carbon |
| CN110496610A (en) * | 2019-08-28 | 2019-11-26 | 西安建筑科技大学 | A kind of regenerative agent and regeneration method for desulphurization denitration waste active carbon |
| CN110605108A (en) * | 2019-09-26 | 2019-12-24 | 西安建筑科技大学 | Method for regenerating desulfurization and denitrification waste active carbon |
| CN111013378A (en) * | 2019-11-20 | 2020-04-17 | 北京首钢国际工程技术有限公司 | Purifying agent for complex pellet flue gas |
| CN111762782A (en) * | 2020-07-15 | 2020-10-13 | 成都云白环境设备制造有限公司 | Preparation method of desulfurization and denitrification activated carbon |
| CN117509642A (en) * | 2023-12-22 | 2024-02-06 | 宁夏恒辉活性炭有限公司 | High-yield activation process of Sieve activation furnace |
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| CN1385367A (en) * | 2002-06-25 | 2002-12-18 | 南化集团研究院 | Method for producing desulfurization and denitrification activated carbon by using byproduct carbon black |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107827109A (en) * | 2017-10-18 | 2018-03-23 | 北京国电富通科技发展有限责任公司 | Powdered Activated Carbon regenerative system and preparation method |
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| CN110496610A (en) * | 2019-08-28 | 2019-11-26 | 西安建筑科技大学 | A kind of regenerative agent and regeneration method for desulphurization denitration waste active carbon |
| CN110605108A (en) * | 2019-09-26 | 2019-12-24 | 西安建筑科技大学 | Method for regenerating desulfurization and denitrification waste active carbon |
| CN111013378A (en) * | 2019-11-20 | 2020-04-17 | 北京首钢国际工程技术有限公司 | Purifying agent for complex pellet flue gas |
| CN111762782A (en) * | 2020-07-15 | 2020-10-13 | 成都云白环境设备制造有限公司 | Preparation method of desulfurization and denitrification activated carbon |
| CN117509642A (en) * | 2023-12-22 | 2024-02-06 | 宁夏恒辉活性炭有限公司 | High-yield activation process of Sieve activation furnace |
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| CN105858650B (en) | 2018-03-20 |
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