CN105838400A - System and method for preparing activated carbon from biomass - Google Patents
System and method for preparing activated carbon from biomass Download PDFInfo
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- CN105838400A CN105838400A CN201610355809.5A CN201610355809A CN105838400A CN 105838400 A CN105838400 A CN 105838400A CN 201610355809 A CN201610355809 A CN 201610355809A CN 105838400 A CN105838400 A CN 105838400A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/10—Feedstock materials
- C10G2300/1011—Biomass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention discloses a system for preparing activated carbon from biomass. The system comprises a spiral feeder (3-1), a downer fast pyrolysis activating furnace (3) and a spiral discharger (3-8), wherein the downer fast pyrolysis activating furnace (3) is internally divided into a drying zone, a pyrolysis zone, a transition zone and an activating zone in sequence from top to bottom; radiant tubes (3-4) are distributed inside each of the drying zone, the pyrolysis zone and the activating zone; the downer fast pyrolysis activating furnace (3) comprises an oil-gas outlet (3-6) and a steam inlet (3-7); the oil-gas outlet (3-6) is formed in a boundary of the pyrolysis zone and the transition zone; the steam inlet (3-7) is formed in the lower part of the activating zone. By adopting the system, pyrolytic high-temperature charcoal can be directly adopted for activation reaction without being cooled, then the activated carbon can be prepared, a relatively good energy conservation effect can be achieved, and meanwhile the charcoal obtained through fast pyrolysis is relatively high in reaction activity.
Description
Technical field
The present invention relates to chemical field, be specifically related to a kind of biomass and prepare the system and method for activated carbon.
Background technology
The exhaustive exploitation of the fossil energy that coal, oil etc. are non-renewable and utilization so that tellurian environmental problem is increasingly
Sternness, the task of the alternative energy source finding a kind of clean type is extremely the most urgent.Biomass resource is the fourth-largest money on the earth
Source, its reserves are only second to coal, oil and natural gas, are also the clean type regenerative resource of reserves first simultaneously, are the suitableeest
One of fossil energy alternative energy source closed.But the utilization ratio of biomass resource is the highest, most of agricultural wastes are direct
Farmland is burned, and not only causes environmental pollution, also results in energy waste.Therefore, biomass resource is efficiently utilized to delay
Solve energy scarcity and problem of environmental pollution, moreover it is possible to turn waste into wealth and bring economic benefit.
It is the maximally effective utilizations of biomass that biomass are prepared as activated carbon, bio oil and pyrolysis gas by the method activated by pyrolysis
One of approach.Biomass are prepared activated carbon and are broadly divided into Physical and chemical method；Chemical method prepares charcoal to be needed to carry out deacidification
Or desalination reaction, produce substantial amounts of waste water, pollute environment；Physically activated, existence is the longest, consume energy high drawback.
Summary of the invention
In order to solve the problems referred to above, the present invention provides a kind of biomass to prepare the system and method for activated carbon, will pyrolysis, activation
High-temperature biological charcoal through pyrolysis, for carry out in same reacting furnace, is directly used in priming reaction without cooling by reaction designing,
Energy-saving effect is preferable；The charcoal reactivity simultaneously obtained through fast pyrogenation is higher, directly carries out the efficiency of priming reaction
Higher.
In order to solve above-mentioned technical problem, the present invention is achieved by the following technical solutions:
A kind of biomass prepare the system of activated carbon, including: feeding screw 3-1, down-flow fluidized bed using ECT fast pyrogenation activation furnace 3,
Spiral discharging device 3-8, wherein, feeding screw 3-1 is connected with the charging aperture of down-flow fluidized bed using ECT fast pyrogenation activation furnace 3, spiral shell
Screw out glassware 3-8 to be connected with the discharging opening of down-flow fluidized bed using ECT fast pyrogenation activation furnace 3, it is characterised in that: down-flow fluidized bed using ECT fast pyrogenation
Activation furnace 3 is internal is in turn divided into dry section, pyrolysis zone, transition region and region of activation, wherein dry section, pyrolysis from top to bottom
District and region of activation are respectively disposed with radial canal；Down-flow fluidized bed using ECT fast pyrogenation activation furnace 3 includes oil gas vent 3-6 and steam inlet
3-7, wherein, oil gas vent 3-6 is positioned at the intersection of pyrolysis zone and transition region, and steam inlet 3-7 is positioned at the bottom of region of activation.
Further, biomass are prepared the system of activated carbon and are also included: rotary kiln 1, feed bin 2, described rotary kiln
Exsiccator 1 is connected with feed bin 2, and feed bin 2 is connected with feeding screw 3-1；First Heat Exchanger 4, cleaning system 5, life
Thing oil oil tank 6, gas holder 7, wherein, First Heat Exchanger 4 is connected with oil gas vent 3-6 and cleaning system 5 respectively, purifies
System 5 is connected with bio oil oil tank 6 and gas holder 7 respectively；Second heat exchanger the 9, the 3rd heat exchanger 10, charcoal storehouse 11, its
In, the second heat exchanger the 9, the 3rd heat exchanger 10, charcoal storehouse 11 are sequentially connected, the second heat exchanger 9 and spiral discharging device 3-8
It is connected；Steam generator 8, steam generator 8 is connected with steam inlet 3-7.
Further, also include in down-flow fluidized bed using ECT fast pyrogenation activation furnace 3 that tapered material distributor 3-2, tapered material distributor 3-2 are positioned at
The top of the dry section of down-flow fluidized bed using ECT fast pyrogenation activation furnace 3, and down-flow fluidized bed using ECT fast pyrogenation activation furnace 3 material inlet just
Lower section.
Further, down-flow fluidized bed using ECT fast pyrogenation activation furnace 3 also includes: fuel gas inlet 3-3, exhanst gas outlet 3-5, wherein,
Fuel gas inlet 3-3 is the fuel gas inlet of radial canal, and exhanst gas outlet 3-5 is the exhanst gas outlet of radial canal.
Further, gas holder 7 is connected with fuel gas inlet 3-3 and steam generator 8 respectively；Exhanst gas outlet 3-5, the 3rd change
Hot device 10 and rotary kiln 1 are sequentially connected；Soft water supply pipe passes sequentially through the second heat exchanger 9, First Heat Exchanger 4
It is connected with steam generator 8.
Preferably, the height of transition region accounts for the 1/10-1/5 of down-flow fluidized bed using ECT fast pyrogenation activation furnace total height.
The system using above-described biomass to prepare activated carbon prepares the method for activated carbon, it is characterised in that: include as follows
Step:
Step 1, biomass are carried out preheating and drying process by rotary kiln 1；
Biomass after step 2, dried are delivered to feed bin 2；
Biomass in step 3, feed bin 2 are delivered into down-flow fluidized bed using ECT fast pyrogenation activation furnace 3 by feeding screw 3-1
At material inlet；
Step 4, biomass rely on self gravitation through tapered material distributor 3-2, radial canal 3-4 uniform distribution；
Step 5, it is passed through combustion gas by fuel gas inlet 3-3 to the radial canal 3-4 of down-flow fluidized bed using ECT fast pyrogenation activation furnace 3；
Step 6, biomass are dried process through dry section；
Biomass entrance pyrolysis zone after the process of step 7, dry section carries out pyrolytic reaction and prepares charcoal and pyrolysis oil gas；
Step 8, steam generator 8 generate steam and enter activation through the steam inlet 3-7 of down-flow fluidized bed using ECT fast pyrogenation activation furnace 3
District；
Step 9, the charcoal entrance region of activation obtained through step 7, via steam activation；
Charcoal after step 10, activation forms activated carbon, discharges via spiral discharging device 3-8；
Step 11, the activated carbon discharged process through the second heat exchanger 9 and the 3rd heat exchanger 10 heat exchange, are stored in charcoal storehouse 11；
The pyrolysis oil gas that step 12, step 7 prepare is discharged through oil gas vent 3-6, after the heat exchange of a heat exchanger 4, enters
Enter cleaning system 5；Bio oil is stored in bio oil oil tank 6, and pyrolysis gas is stored in gas holder 7.
Preferably, the pyrolysis gas part in gas holder 7 is used for radial canal 3-4 heat supply by fuel gas inlet 3-3, in gas holder 7
Pyrolysis gas a part provide energy production steam for steam generator 8.
Preferably, the flue gas discharged from exhanst gas outlet 3-5 processes through the 3rd heat exchanger 10 heat exchange, is delivered to rotary kiln drying
Device 1 is for carrying out preheating and drying to biomass.
Preferably, the soft water supplied by soft water supply pipe is processed through the second heat exchanger 9, First Heat Exchanger 4 respectively, conveying
To steam generator 8.
Preferably, dry section temperature 400～600 DEG C, pyrolysis zone temperature 550～650 DEG C, region of activation temperature 700～900 DEG C.
The invention has the beneficial effects as follows, biomass prepare the pyrolysis of activated carbon, priming reaction is carried out in same reactor, warp
Charcoal after pyrolysis is directly used in activation, and efficiency is high；Raw material drying provides for flue gas heat exchange, activated carbon and high temperature pyrolysis oil
Sensible heat contained by gas all gives heat exchange and reclaims, and energy utilization rate is high；Reaction pyrolysis oil, activated carbon productivity are higher, activated carbon-iodine simultaneously
Adsorptive value and methylene blue adsorption value are higher, and activated carbon property is preferable.
Accompanying drawing explanation
Fig. 1 is system structure and the schematic flow sheet that a kind of biomass of the present invention prepare activated carbon.
Fig. 2 is the structural representation that a kind of biomass of the present invention prepare the down-flow fluidized bed using ECT fast pyrogenation activation furnace of the system of activated carbon
Figure.
Wherein, 1, rotary kiln, 2, feed bin, 3, down-flow fluidized bed using ECT fast pyrogenation activation furnace, 3-1, feeding screw,
3-2, tapered material distributor, 3-3, fuel gas inlet, 3-4, radial canal, 3-5, exhanst gas outlet, 3-6, oil gas vent, 3-7,
Steam inlet, 3-8, spiral discharging device, 4, heat exchanger, 5, cleaning system, 6, bio oil oil tank, 7, gas holder,
8, steam generator, 9, No. two heat exchangers, 10, No. three heat exchangers, 11, charcoal storehouse.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, to this
Invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.
See figures.1.and.2.The invention provides a kind of biomass and prepare the system of activated carbon, including: feeding screw 3-1,
Down-flow fluidized bed using ECT fast pyrogenation activation furnace 3, spiral discharging device 3-8, wherein, feeding screw 3-1 lives with down-flow fluidized bed using ECT fast pyrogenation
The charging aperture changing stove 3 is connected, and spiral discharging device 3-8 is connected with the discharging opening of down-flow fluidized bed using ECT fast pyrogenation activation furnace 3.Under
Internal dry section, pyrolysis zone, transition region and the region of activation of being in turn divided into from top to bottom of row bed fast pyrogenation activation furnace 3, wherein,
Dry section, pyrolysis zone and region of activation are respectively disposed with radial canal；Down-flow fluidized bed using ECT fast pyrogenation activation furnace 3 includes oil gas vent 3-6
With steam inlet 3-7, wherein, oil gas vent 3-6 is positioned at the intersection of pyrolysis zone and transition region, is used for discharging pyrolysis oil gas
The gas produced with activation；Steam inlet 3-7 is positioned at the bottom of region of activation.
Described biomass are prepared the system of activated carbon and are also included: rotary kiln 1, feed bin 2, described rotary kiln
1 is connected with feed bin 2, and feed bin 2 is connected with feeding screw 3-1；First Heat Exchanger 4, cleaning system 5, bio oil oil
Tank 6, gas holder 7, wherein, First Heat Exchanger 4 is connected with oil gas vent 3-6 and cleaning system 5 respectively, cleaning system 5
It is connected with bio oil oil tank 6, gas holder 7 respectively；Second heat exchanger the 9, the 3rd heat exchanger 10, charcoal storehouse 11, wherein, second
Heat exchanger 9 is connected with spiral discharging device 3-8, and the second heat exchanger the 9, the 3rd heat exchanger 10, charcoal storehouse 11 are sequentially connected；Steam
Vapour generator 8, steam generator 8 is connected with steam inlet 3-7.
Further, also include in down-flow fluidized bed using ECT fast pyrogenation activation furnace 3 that tapered material distributor 3-2, tapered material distributor 3-2 are positioned at
The top of the dry section of down-flow fluidized bed using ECT fast pyrogenation activation furnace 3, and down-flow fluidized bed using ECT fast pyrogenation activation furnace 3 material inlet just
Lower section.
Further, down-flow fluidized bed using ECT fast pyrogenation activation furnace 3 also includes: fuel gas inlet 3-3, exhanst gas outlet 3-5, wherein,
Fuel gas inlet 3-3 is the fuel gas inlet of radial canal, and exhanst gas outlet 3-5 is the exhanst gas outlet of radial canal.
Further, gas holder 7 is connected with fuel gas inlet 3-3 and steam generator 8 respectively.Exhanst gas outlet 3-5, the 3rd change
Hot device 10 and rotary kiln 1 are sequentially connected.Soft water supply pipe passes sequentially through the second heat exchanger 9, First Heat Exchanger 4
It is connected with steam generator 8.
The height of transition region accounts for the 1/10-1/5 of pyrolysis activation furnace total height.
The function of transition region is to be separated in pyrolysis zone and region of activation；Oil gas vent 3-6 is positioned at the boundary of pyrolysis zone and transition region
Place, for discharging pyrolysis oil gas and activating the gas produced.
Under in working order, material is after dry section and pyrolysis zone, and appropriateness is deposited in region of activation, to allow material to carry out
Priming reaction, the highly desirable position less than oil gas vent of accumulation.The gas that the pyrolysis oil gas that pyrolysis produces produces with activation
All pass through oil gas vent and discharge pyrolysis activation furnace, preferably expellant gas is sent to the fuel gas inlet of radial canal, supplies as fuel
Radial canal burns.
The Viability charcoal of activated material shape, as final products.
The system using above-described biomass to prepare activated carbon prepares active carbon method, comprises the steps:
Step 1, biomass are carried out preheating and drying process by rotary kiln 1；
Biomass after step 2, dried are delivered to feed bin 2；
Biomass in step 3, feed bin 2 are delivered into down-flow fluidized bed using ECT fast pyrogenation activation furnace 3 by feeding screw 3-1
At material inlet；
Step 4, biomass rely on self gravitation through tapered material distributor 3-2, radial canal 3-4 uniform distribution；
Step 5, it is passed through combustion gas by fuel gas inlet 3-3 to the radial canal 3-4 of down-flow fluidized bed using ECT fast pyrogenation activation furnace 3；
Step 6, biomass are dried process through dry section；
Biomass entrance pyrolysis zone after the process of step 7, dry section carries out pyrolytic reaction and prepares charcoal and pyrolysis oil gas；
Step 8, steam generator 8 generate steam and enter activation through the steam inlet 3-7 of down-flow fluidized bed using ECT fast pyrogenation activation furnace 3
District；
Step 9, the charcoal entrance region of activation obtained through step 7, via steam activation；
Charcoal after step 10, activation is discharged via spiral discharging device 3-8；
Step 11, the activated carbon discharged process through No. two heat exchangers 9 and No. three heat exchanger 10 heat exchange, are stored in charcoal storehouse 11；
The pyrolysis oil gas that step 12, step 7 prepare is discharged through oil gas vent 3-6, after the heat exchange of a heat exchanger 4, enters
Enter cleaning system 5；Bio oil is stored in bio oil oil tank 6, and pyrolysis gas is stored in gas holder 7.
A pyrolysis gas part in gas holder 7 is used for radial canal 3-4 heat supply, the pyrolysis gas in gas holder 7 by fuel gas inlet 3-3
A part provides energy production steam for steam generator 8.
From exhanst gas outlet 3-5 discharge flue gas process through No. three heat exchanger 10 heat exchange, be delivered to rotary kiln 1 for
Biomass are carried out preheating and drying.
The soft water supplied by soft water supply pipe is processed through the second heat exchanger 9, First Heat Exchanger 4 respectively, is delivered to steam and sends out
Raw device 8.
Dry section temperature 400～600 DEG C, pyrolysis zone temperature 550～650 DEG C, region of activation temperature 700～900 DEG C.
Described biomass material particle size range 0.1～10mm.
Embodiment
The workflow of the present embodiment is: pine sawdust (particle diameter ＜ 6mm) is dried through rotary kiln 1, moisture content
8%, temperature 70 C；It is delivered to feed bin 2, enters in down-flow fluidized bed using ECT fast pyrogenation activation furnace 3 via feeding screw 3-1,
Rely on self gravitation through tapered material distributor 3-2, radial canal 3-4 cloth, sequentially pass through dry section (400 DEG C), pyrolysis zone
, there is fast pyrogenation reaction in (600 DEG C), reacted charcoal enters into region of activation (900 DEG C), warp through transition region simultaneously
By steam activation (600 DEG C), the high temperature active charcoal (650 DEG C) after activation is discharged by spiral discharging device 3-8, changes through second
Hot device 9 and the 3rd heat exchanger 10 heat exchange process, and are stored in charcoal storehouse 11；High temperature pyrolysis oil gas (550 DEG C) is by oil gas vent 3-6
Discharging, enter into cleaning system 5 after First Heat Exchanger 4 heat exchange processes, bio oil is sent into bio oil oil tank 6 and is stored, heat
A part of venting one's spleen provides energy for radial canal 3-4 heat supply, another part for steam generator 8, produces steam.
Product measures analysis, and result see table:
Table 1 products distribution
| Bio oil | Activated carbon | Pyrolysis gas | Pyrolysis water |
| 31% | 26% | 27% | 16% |
Table 2 activated carbon-iodine adsorptive value and methylene blue adsorption value
| Iodine sorption value mg/g | Methylene blue adsorption value ml/g |
| 1102 | 182 |
Above by embodiment, the present invention is described in detail, it should be appreciated that those skilled in the art completely may be used
With in the range of without departing from this invention technological thought, carry out change and the amendment of various ways.The present invention's is technical
Scope is not limited to content described above, it is necessary to determine its protection domain according to right.
Claims (11)
1. biomass prepare a system for activated carbon, including: feeding screw (3-1), down-flow fluidized bed using ECT fast pyrogenation activate
Stove (3), spiral discharging device (3-8), wherein, feeding screw (3-1) and down-flow fluidized bed using ECT fast pyrogenation activation furnace (3)
Charging aperture is connected, and spiral discharging device (3-8) is connected with the discharging opening of down-flow fluidized bed using ECT fast pyrogenation activation furnace (3), and it is special
Levy and be: down-flow fluidized bed using ECT fast pyrogenation activation furnace (3) is internal is in turn divided into dry section, pyrolysis zone, transition region from top to bottom
And region of activation, wherein dry section, pyrolysis zone and region of activation are respectively disposed with radial canal (3-4)；Down-flow fluidized bed using ECT fast pyrogenation activates
Stove (3) includes oil gas vent (3-6) and steam inlet (3-7), and wherein, oil gas vent (3-6) is positioned at pyrolysis zone and mistake
Crossing the intersection in district, steam inlet (3-7) is positioned at the bottom of region of activation.
Biomass the most according to claim 1 prepare the system of activated carbon, it is characterised in that: also include: rotary kiln
Exsiccator (1), feed bin (2), described rotary kiln (1) is connected with feed bin (2), and feed bin (2) enters with spiral
Glassware (3-1) is connected；First Heat Exchanger (4), cleaning system (5), bio oil oil tank (6), gas holder (7), wherein,
First Heat Exchanger (4) is connected with oil gas vent (3-6) and cleaning system (5) respectively, cleaning system (5) respectively with life
Thing oil oil tank (6), gas holder (7) are connected；Second heat exchanger (9), the 3rd heat exchanger (10), charcoal storehouse (11), wherein,
Second heat exchanger (9), the 3rd heat exchanger (10), charcoal storehouse (11) are sequentially connected, the second heat exchanger (9) and spiral discharging
Device (3-8) is connected；Steam generator (8), steam generator (8) is connected with steam inlet (3-7).
3. the system of activated carbon is prepared according to the biomass described in claims 1 or 2, it is characterised in that: down-flow fluidized bed using ECT is fast
Also include that tapered material distributor (3-2), tapered material distributor (3-2) are positioned at down-flow fluidized bed using ECT fast pyrogenation in speed pyrolysis activation furnace (3)
The top of the dry section of activation furnace (3), and the underface of the material inlet at down-flow fluidized bed using ECT fast pyrogenation activation furnace (3).
4. the system of activated carbon is prepared according to the biomass described in claims 2, it is characterised in that: down-flow fluidized bed using ECT Rapid Thermal
Solve activation furnace (3) also to include: fuel gas inlet (3-3), exhanst gas outlet (3-5), wherein, fuel gas inlet (3-3) is spoke
Penetrating the fuel gas inlet of pipe (3-4), exhanst gas outlet (3-5) is the exhanst gas outlet of radial canal (3-4).
5. the system of activated carbon is prepared according to the biomass described in claims 4, it is characterised in that: gas holder (7) is respectively
It is connected with fuel gas inlet (3-3) and steam generator (8)；Exhanst gas outlet (3-5), the 3rd heat exchanger (10) and revolution
Kiln exsiccator (1) is sequentially connected；Soft water supply pipe passes sequentially through the second heat exchanger (9), First Heat Exchanger (4) and steam
Generator (8) is connected.
Biomass the most according to claim 1 prepare the system of activated carbon, it is characterised in that: the height of transition region accounts for
The 1/10-1/5 of pyrolysis activation furnace total height.
7. the method that the system using right to want the biomass according to any one of 1 to 6 to prepare activated carbon prepares activated carbon,
It is characterized in that: comprise the steps:
Step 1, biomass are carried out preheating and drying process by rotary kiln (1)；
Biomass after step 2, dried are delivered to feed bin (2)；
Biomass in step 3, feed bin (2) are delivered into the activation of down-flow fluidized bed using ECT fast pyrogenation by feeding screw (3-1)
At the material inlet of stove (3)；
Step 4, biomass rely on self gravitation through tapered material distributor (3-2), radial canal (3-4) uniform distribution；
Step 5, it is passed through to the radial canal (3-4) of down-flow fluidized bed using ECT fast pyrogenation activation furnace (3) by fuel gas inlet (3-3)
Combustion gas；
Step 6, biomass are dried process through dry section；
Biomass entrance pyrolysis zone after the process of step 7, dry section carries out pyrolytic reaction and prepares charcoal and pyrolysis oil gas；
Step 8, steam generator (8) generate the steam steam inlet (3-7) through down-flow fluidized bed using ECT fast pyrogenation activation furnace (3)
Enter region of activation；
Step 9, the charcoal entrance region of activation obtained through step 7, via steam activation；
Charcoal after step 10, activation is discharged via spiral discharging device (3-8)；
Step 11, the activated carbon discharged process through the second heat exchanger (9) and the 3rd heat exchanger (10) heat exchange, are stored in charcoal storehouse
(11)；
The pyrolysis oil gas that step 12, step 7 prepare is discharged through oil gas vent (3-6), through First Heat Exchanger (4) heat exchange
After, enter cleaning system (5)；Bio oil is stored in bio oil oil tank (6), and pyrolysis gas is stored in gas holder (7).
The method preparing activated carbon the most according to claim 7, wherein, the pyrolysis gas part in gas holder (7) is led to
Crossing fuel gas inlet (3-3) and be used for radial canal (3-4) heat supply, the pyrolysis gas part in gas holder (7) is steam generator
(8) energy production steam is provided.
The method preparing activated carbon the most according to claim 7, wherein, the flue gas discharged from exhanst gas outlet (3-5)
Process through the 3rd heat exchanger (10) heat exchange, be delivered to rotary kiln (1) for biomass are carried out preheating and drying.
The method preparing activated carbon the most according to claim 7, wherein, the soft water supplied by soft water supply pipe is divided
Do not process through the second heat exchanger (9), First Heat Exchanger (4), be delivered to steam generator (8).
11. methods preparing activated carbon according to claim 7, it is characterised in that: dry section temperature 400～600 DEG C,
Pyrolysis zone temperature 550～650 DEG C, region of activation temperature 700～900 DEG C.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107416829A (en) * | 2017-05-31 | 2017-12-01 | 大连理工大学 | The technique that a kind of biomass pyrolytic activation prepares activated carbon |
| CN111847452A (en) * | 2020-08-03 | 2020-10-30 | 范思辰 | One-step preparation device and method for biomass activated carbon |
| CN113461007A (en) * | 2021-07-28 | 2021-10-01 | 东南大学 | Movable biomass pyrolysis activation partition coupling method and device |
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