CN102249227B - System for preparing high-specific-surface active carbon - Google Patents
System for preparing high-specific-surface active carbon Download PDFInfo
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- CN102249227B CN102249227B CN 201110157832 CN201110157832A CN102249227B CN 102249227 B CN102249227 B CN 102249227B CN 201110157832 CN201110157832 CN 201110157832 CN 201110157832 A CN201110157832 A CN 201110157832A CN 102249227 B CN102249227 B CN 102249227B
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- retrieving arrangement
- activation furnace
- air outlet
- nitrogen
- activating
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Abstract
The invention discloses a system for preparing high-specific-surface active carbon. The system comprises a nitrogen supplying device, an activating oven and a first recovering device, wherein the nitrogen supplying device is communicated with a nitrogen inlet of the activating oven through a first connection pipeline; the activating oven is an enclosed container; a heating device is arranged in the activating device; the activating oven comprises a first gas outlet and the nitrogen inlet; and the first recovering device is an enclosed container in which an absorbing liquid is filled. The recovering device is arranged to absorb alkali steam in the activating oven, so that the alkali steam is prevented from being directly discharged into the atmosphere for polluting the environment and causing safety hazard; meanwhile, alkali particles obtained by cooling the alkali steam are filtered and recovered, so that dust is prevented from being discharged into the atmosphere; an explosion-proof valve is arranged and is opened automatically when the pressure in the activating oven is up to a preset value, so that over-high pressure in the activating oven is avoided; and a nitrogen gas curtain is positioned on the inner side of the explosion-proof valve, so that gas in the activating oven can be prevented from overflowing even if the explosion-proof valve is opened.
Description
Technical field
The present invention relates to a kind of system for preparing gac, more particularly, the present invention relates to a kind of preparation system that uses the alkali activator to make active carbon with high specific surface area.
Background technology
Carbonized material has possessed basic pore texture and the specific surface area of some amount in process of production, but differs greatly apart from the desired technical indicator of gac.Activation is exactly under the prerequisite that keeps the carbon granule some strength, makes carbonized material have flourishing pore texture and huge specific surface area by technological measure, reaches the desired technical feature of gac.
Chinese patent 200920025172.9 discloses a kind of rotary honeycomb active carbon activating furnace, comprise vertical activation tube, vertical activation tube is provided with feed inlet and outlet, be provided with bin in the activation tube, feature is that described vertical activation tube is provided with driving mechanism, driving mechanism is provided with electric motor, step-down gear, shaft coupling and vertical transmission shaft.
Chinese patent 200710056095.9 discloses a kind of charcoal revivifyig plant and activation method thereof, and this device is to be made of venetian blind type activation furnace and the coal gas recycle system.Activation furnace is to be formed by the window shutter brick masonry that has oblique mouthful, flue in the middle of being provided with in the middle of the activation product channel, and both sides are provided with the side flue, and activation product channels bottom communicates with the combustion chamber, and the bottom is provided with discharger; The coal gas recycle system be by the activation gas exit by pipeline and interchanger, spray column, steam separator, gas blower, gasburner, waste heat boiler, combustion chamber, the vent stack formation that links to each other.
Chinese patent 200710034228.2 discloses the activation furnace of a kind of production and reproducing activation block absorbent charcoal, there is the front portion to be provided with the closed furnace body of fire door, body of heater is provided with thermal insulation layer, it comprises that also places a kiln car that moves on the track, this kiln car is provided with the upper strata carriage that can enter or withdraw from from the fire door bottom body of heater inner chamber, be equipped with the sealed metal container with hermatic door on the described carriage, the suction opening with the vacuum pump outside the described body of heater is communicated with sealing metal vessel inner chamber through communicating pipe; The temperature sensor of measuring corresponding site temperature in the stove is equipped with respectively in described body of heater top and a upper lateral part, opposite side bottom, and the signal wire of described each temperature sensor connects with corresponding digital temperature indicating meter respectively, described body of heater inner chamber end face and bottom surface, left surface, right flank all are furnished with by the heating wire of three-phase supply by the power supply of three-phase contact type voltage regulator, are serially connected with the digital circuit table in every phase power source circuit.
Chinese patent application 200810162825.8 discloses the basic metal continous treatment process that gac is made in the activation of a kind of alkali, and it comprises: the waste gas that gac produces is made in the alkali activation entered in the oxidizing tower by vapor pipe, vapor pipe is heated and is incubated; Will be through step 1) expellant gas utilizes air that basic metal is oxidized to alkalimetal oxide in oxidizing tower, and is cooled in air-flow; Will be through step 2) cooled alkalimetal oxide powder enters in the drive of air-flow and reclaims the chamber, utilizes the dissolving of water spray to carry out washing and recycling reclaiming the chamber.
Chinese patent 200910009778.8 applications disclose a kind of external heating vertical active carbon activation furnace, and the urceolus of this activation furnace (13) rotates with electric motor driving in the lower end; Be provided with heat tunnel (14) between the outer side of urceolus (13) and the furnace wall (15), urceolus hot-plate (3) and inner core hot-plate (6) be staggered arrangement successively vertically; Urceolus flight (4) and inner core flight (5) are installed in the downside of urceolus hot-plate (3) and inner core hot-plate (6) and in spiral distribution with hinge respectively; Gas-distributing pipe (7) is deep into the downside of inner core hot-plate (6), and a minute vent hole is distributed in inner core hot-plate (6) downside; Inner core (16) has air outlet (17) at the sidewall of respective combustion chamber (1).
Because the reactivation process of gac is at high temperature carried out usually, can at high temperature decompose for alkali activators such as the potassium hydroxide that activates, sodium hydroxide, form contaminative, extremely strong potassium steam, the sodium steam of corrodibility, the shortcoming of technique scheme is that the device that is specifically designed to recycling potassium steam, sodium steam is not set.
Summary of the invention
For the shortcoming of prior art, the purpose of this invention is to provide a kind of preparation system of active carbon with high specific surface area, it is provided with the retrieving arrangement that can reclaim potassium steam, sodium steam.
To achieve these goals, the invention provides a kind of system for preparing active carbon with high specific surface area, this system comprises:
The nitrogen supply (NS) device, it is connected with the nitrogen inlet mouth of activation furnace by the first connecting tube;
Activation furnace, it is encloses container, is provided with heating unit in it; This activation furnace comprises the first air outlet and nitrogen inlet mouth; Wherein, nitrogen inlet mouth place establishes and forms the nitrogen air curtain, and place, the first air outlet is connected with the second connecting tube;
The first retrieving arrangement, it establishes the encloses container of absorption liquid in being, and the second connecting tube injects in the first retrieving arrangement, and extends to below the liquid level of absorption liquid; The liquid level top of absorption liquid is provided with the air outlet.
Device of the present invention is applicable to the priming reaction take alkali as activator.For example, take potassium hydroxide as activator, itself and the reaction at high temperature of charcoal particle are:
KOH+C→K
2CO
3+K
2O+H
2
KOH, K
2CO
3, K
2O forms etching to single graphite microcrystal or crystallite group and generates the hole of different pore size, and the micro-molecular gas that reaction generates in the reactivation process is such as CO, CO
2, H
2, H
2O, H
2S etc. in the process of existing duct outflow, play the effect of reaming because of high-temperature expansion.In addition, in the process of activation, have potassium metal steam and produce.Potassium metal steam will enter graphite layers, the effect of performance pore-creating, reaming.
Because potassium metal steam is very active, directly contacting with air can blast.Generation for fear of blast will pass into nitrogen in whole reactivation process, directly contact with air to stop potassium metal steam.
In order further to improve the thoroughness of the present invention's system, preferably, in system of the present invention, its activation furnace further comprises the second air outlet, and this place, the second air outlet is provided with explosion trap, and above-mentioned nitrogen air curtain is positioned at the inboard of this explosion trap.
Like this, the pressure in activation furnace surpasses certain limit, and Explosion-proof valve is opened automatically.Be provided with like this two effects: the one, when gaseous tension hour, block the second air outlet of activation furnace, as the barrier that stops the gas overflowing in the activation furnace; The 2nd, when the violent expansion of the gas in the activation furnace surpasses certain limit (for example 3 kilograms), automatically open, avoid activation furnace to explode thorax.
The nitrogen air curtain is positioned at the inboard of explosion trap, has formed the twice barrier that stops the gas overflowing in the activation furnace with Explosion-proof valve.Even Explosion-proof valve is opened like this, under the stopping of nitrogen air curtain, the gas in the activation furnace still can't overflow.
In the whole reaction process and after the reaction, the gas in the activation furnace is passed in the first retrieving arrangement and reclaims.Absorption liquid (for example water) in the first retrieving arrangement is with KOH steam, K in the absorption of gases
2CO
3Steam, K
2O steam and high temperature potassium steam pass in the atmosphere to avoid these to have contaminative, corrodibility, volatile hazardous gas.
According to an embodiment of the present invention, activation furnace is provided with vertical gas pipeline; The outlet on this gas pipeline top is the second air outlet, and this place, the second air outlet is provided with explosion trap; The below of the sidewall of this gas pipeline, the second air outlet has the nitrogen inlet mouth.The nitrogen inlet mouth is positioned under the Explosion-proof valve, and the high pressure nitrogen that constantly passes into forms the nitrogen air curtain at nitrogen inlet mouth place.
According to another embodiment of the present invention, the bottom of the first retrieving arrangement is provided with the first recovery channel that reclaims the liquid outlet and be connected in this recovery liquid outlet, and this first recovery channel is provided with valve.This first recovery channel is set collects easily the interior highly concentrated solution of the first retrieving arrangement, so that recycle.
According to another embodiment of the present invention, this preparation system also can comprise the second retrieving arrangement; This second retrieving arrangement is the container that is provided with opening for feed, venting port, filtering net; Opening for feed is located at the below of the second retrieving arrangement sidewall, filtering net, and is connected by the discharge port of the 3rd connecting tube with the first retrieving arrangement; Venting port is arranged at the top of the second retrieving arrangement, the top of filtering net, and venting port is outer can to connect gas exhaust duct.The length of the 3rd connecting tube is longer, and the gas in such the first retrieving arrangement has sufficient time cooling in the process through the 3rd connecting tube.The KOH particle, the K that obtain after the cooling
2CO
3Particle, K
2Other dust of O particle is filtered net filtration, and is pollution-free to guarantee through the venting port expellant gas.
According to another embodiment of the present invention, the bottom of the second retrieving arrangement is provided with the material recycle mouth and is connected in the second recovery channel of this material recycle mouth, and this second recovery channel is provided with valve.This second recovery channel is set collects easily the second retrieving arrangement interior solid particulate and dust.
According to another embodiment of the present invention, activation furnace is the intermittent type activation furnace, and its side is provided with the end cap that can open.Open the material container that will fill activator and charcoal particle to be activated behind the end cap and put into activation furnace, then close upper end cover and carry out priming reaction.Owing to link to each other in end cap and the stove, and end cap is generally steel, for fear of the end cap excess Temperature personnel, equipment produced dangerously, and this end cap is provided with for the water cooled pipeline that leads to water coolant.
According to another embodiment of the present invention, activation furnace is provided with tensimeter, is used for showing the pressure in the cremator; The first retrieving arrangement is provided with water level gauge, is used for showing the water level in the first retrieving arrangement.
According to another embodiment of the present invention, the first retrieving arrangement is provided with pressure regulator valve, is used for regulating the pressure in the activation furnace.
According to another embodiment of the present invention, the heating unit in the activation furnace specifically can be one or more electrical heating wire.
According to another embodiment of the present invention, activation furnace also comprises the heating control cabinet for the control heating unit, to realize accurately controlling Heating temperature and heat-up time.
Compared with prior art, the present invention has following beneficial effect:
1, by the first retrieving arrangement is set, the alkali steam in the activation furnace is effectively reclaimed, avoid alkali steam directly to be discharged in the atmosphere contaminate environment and brought potential safety hazard;
2, by the second retrieving arrangement is set, make the alkali particle that obtains after the alkali steam cooling be filtered and reclaim, avoided simultaneously dust to enter in the atmosphere;
3, by Explosion-proof valve is set, automatically open when making the pressure of Explosion-proof valve in activation furnace reach preset value, avoided the activation furnace internal pressure excessive and blast;
4, the nitrogen air curtain is positioned at the inboard of explosion trap, even Explosion-proof valve is opened, still can stop the gas overflowing in the activation furnace.
The present invention is described in further detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is that specific embodiments of the invention are along the structural representation of the longitudinal cross-section of its axis.
Embodiment
As shown in Figure 1, specific embodiments of the invention comprise: activation furnace 1, nitrogen supply (NS) device 2, the first retrieving arrangement 3, the second retrieving arrangement 4.
Wherein, activation furnace 1 is encloses container, is provided with material container such as nickel crucible 101, heating unit such as many electrical heating wires 102 in it; Its top is provided with vertical gas pipeline 103, and the outlet on gas pipeline 103 tops is the second air outlet, and this place, the second air outlet is provided with explosion trap 104, and when the violent expansion of the gas in the activation furnace surpassed certain limit, explosion trap 104 was opened automatically.The below of the sidewall of gas pipeline 103, the second air outlet is provided with nitrogen inlet mouth 105.The body of heater of activation furnace 1 is provided with the first air outlet 106; Place, the first air outlet 106 is connected with the second connecting tube 107; Activation furnace 1 is the intermittent type activation furnace, and its side is provided with the end cap 108 that can open, and end cap is provided with the water cooled pipeline (not shown) for logical water coolant.Activation furnace 1 is provided with for the tensimeter 109 that shows in the stove.Activation furnace 1 also comprises the heating control cabinet 110 for control electrical heating wire 102, to realize accurately controlling Heating temperature and heat-up time.
Nitrogen supply (NS) device 2 is connected with the nitrogen inlet mouth 105 of activation furnace 1 by the first connecting tube 201;
The first retrieving arrangement 3 is encloses container, is provided with absorption liquid 306, the second connecting tubes 107 in it and injects in the first retrieving arrangement 3, and extend to below the liquid level of absorption liquid 306; The top of absorption liquid 306 liquid levels, the top of the first retrieving arrangement 3 are provided with air outlet 301.The bottom of the first retrieving arrangement 3 is provided with the first recovery channel 303 that reclaims liquid outlet 302 and be connected in this recovery liquid outlet 302, and this first recovery channel 303 is provided with valve.The first retrieving arrangement 3 is provided with the water level gauge 304 for water level in the display unit, and the pressure regulator valve 305 that is used for regulating activation furnace 1 internal pressure.
The second retrieving arrangement 4 is encloses container, and it is provided with opening for feed 401, material recycle mouth 402, venting port 403, filtering net 405.Opening for feed 401 is located at the sidewall of the second retrieving arrangement 4, the below of filtering net 405, and is connected with the air outlet 301 of the first retrieving arrangement 3 by the 3rd connecting tube 404; Material recycle mouth 402 is positioned at the bottom of the second retrieving arrangement 4; Venting port 403 is arranged at the top of the second retrieving arrangement 4, the top of filtering net 405.Venting port 403 is externally connected with gas exhaust duct 408.The length of the 3rd connecting tube 404 is longer, and the gas in such the first retrieving arrangement 3 has sufficient time cooling in the process through the 3rd connecting tube 404.The second recovery channel 406 is connected in material recycle mouth 402, and this second recovery channel 406 is provided with valve.
Although the present invention discloses as above with preferred embodiment, is not to limit scope of the invention process.Any those of ordinary skill in the art, within not breaking away from invention scope of the present invention, when doing a little improvement, namely every equal improvement of doing according to the present invention should be invention scope of the present invention and contains.
Claims (10)
1. system for preparing active carbon with high specific surface area, it comprises:
The nitrogen supply (NS) device, it is connected with the nitrogen inlet mouth of activation furnace by the first connecting tube;
Activation furnace, it is encloses container, is provided with heating unit in it; Described activation furnace comprises the first air outlet and nitrogen inlet mouth; Described nitrogen inlet mouth place establishes and forms the nitrogen air curtain, and place, described the first air outlet is connected with the second connecting tube;
The first retrieving arrangement, it establishes the encloses container of absorption liquid in being, and described the second connecting tube injects in described the first retrieving arrangement, and extends to below the liquid level of described absorption liquid; The liquid level top of described absorption liquid is provided with the air outlet.
2. the system as claimed in claim 1, wherein, described activation furnace further comprises the second air outlet, and place, described the second air outlet is provided with explosion trap, and described nitrogen air curtain is positioned at the inboard of this explosion trap.
3. system as claimed in claim 2, wherein, described activation furnace is provided with vertical gas pipeline; The outlet on this gas pipeline top is set to described the second air outlet; The below of the sidewall of this gas pipeline, described the second air outlet is provided with described nitrogen inlet mouth.
4. system as claimed in claim 3, wherein, the bottom of described the first retrieving arrangement is provided with reclaims the liquid outlet and is connected in the first recovery channel that this recoverys liquid exports, and this first recovery channel is provided with valve.
5. such as the described system of one of claim 1-4, wherein, described system also comprises the second retrieving arrangement; Described the second retrieving arrangement is the container that is provided with opening for feed, venting port, filtering net; Described opening for feed is located at the below of described the second retrieving arrangement sidewall, described filtering net, and is connected by the discharge port of the 3rd connecting tube with described the first retrieving arrangement; Described venting port is arranged at the top of described the second retrieving arrangement, the top of described filtering net.
6. system as claimed in claim 5, wherein, the bottom of described the second retrieving arrangement is provided with the material recycle mouth and is connected in the second recovery channel of this material recycle mouth, and described the second recovery channel is provided with valve.
7. such as the described system of one of claim 1-4, wherein, the side of described activation furnace is provided with the end cap that can open, and this end cap is provided with water cooled pipeline.
8. such as the described system of one of claim 1-4, wherein, described activation furnace is provided with tensimeter; Described the first retrieving arrangement is provided with water level gauge.
9. such as the described system of one of claim 1-4, wherein, described the first retrieving arrangement is provided with pressure regulator valve, is used for regulating the pressure in the described activation furnace.
10. such as the described system of one of claim 1-4, wherein, described system also comprises be used to the heating control cabinet of controlling described heating unit.
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| CN 201110157832 CN102249227B (en) | 2011-06-13 | 2011-06-13 | System for preparing high-specific-surface active carbon |
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|---|---|---|---|
| CN 201110157832 CN102249227B (en) | 2011-06-13 | 2011-06-13 | System for preparing high-specific-surface active carbon |
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| CN102249227A CN102249227A (en) | 2011-11-23 |
| CN102249227B true CN102249227B (en) | 2013-01-23 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106064816B (en) * | 2016-06-03 | 2018-06-08 | 中国计量大学 | A kind of rotary alkali activation prepares the device and method of activated carbon |
| CN112551527B (en) * | 2020-12-26 | 2023-06-23 | 河南省大潮炭能科技有限公司 | Preparation device and preparation method of active carbon for super capacitor |
| CN113041995A (en) * | 2021-03-02 | 2021-06-29 | 王晋芳 | Composite adsorbent for air purification and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101028925A (en) * | 2006-03-03 | 2007-09-05 | 中国人民解放军63971部队 | Process for producing super-activated carbon |
| CN101434389A (en) * | 2008-12-10 | 2009-05-20 | 南京林业大学 | Preparation of super active carbon |
| CN202099060U (en) * | 2011-06-13 | 2012-01-04 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Alkaline process preparation system of high specific surface activated carbon |
-
2011
- 2011-06-13 CN CN 201110157832 patent/CN102249227B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101028925A (en) * | 2006-03-03 | 2007-09-05 | 中国人民解放军63971部队 | Process for producing super-activated carbon |
| CN101434389A (en) * | 2008-12-10 | 2009-05-20 | 南京林业大学 | Preparation of super active carbon |
| CN202099060U (en) * | 2011-06-13 | 2012-01-04 | 福建省龙岩龙能粉煤灰综合利用有限公司 | Alkaline process preparation system of high specific surface activated carbon |
Non-Patent Citations (1)
| Title |
|---|
| 李永锋等.高比表面积活性炭研究进展.《热带作物学报》.2008,第29卷(第3期),第396-402页. * |
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