WO2002034385A1 - Regeneration process and facilities of spent activated carbons - Google Patents
Regeneration process and facilities of spent activated carbons Download PDFInfo
- Publication number
- WO2002034385A1 WO2002034385A1 PCT/KR2001/001818 KR0101818W WO0234385A1 WO 2002034385 A1 WO2002034385 A1 WO 2002034385A1 KR 0101818 W KR0101818 W KR 0101818W WO 0234385 A1 WO0234385 A1 WO 0234385A1
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- WO
- WIPO (PCT)
- Prior art keywords
- activated carbon
- spent activated
- section
- regenerating
- regenerating spent
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000011069 regeneration method Methods 0.000 title abstract description 39
- 230000008929 regeneration Effects 0.000 title abstract description 35
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 178
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 8
- 231100000719 pollutant Toxicity 0.000 claims abstract description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 50
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 27
- 239000012159 carrier gas Substances 0.000 claims description 26
- 230000001172 regenerating effect Effects 0.000 claims description 24
- 239000001569 carbon dioxide Substances 0.000 claims description 23
- 238000002485 combustion reaction Methods 0.000 claims description 21
- 238000000197 pyrolysis Methods 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 12
- 239000003546 flue gas Substances 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000002156 adsorbate Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000012546 transfer Methods 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 abstract description 13
- 238000011084 recovery Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 description 9
- 230000002265 prevention Effects 0.000 description 7
- 239000003570 air Substances 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000011148 porous material Substances 0.000 description 5
- 238000002309 gasification Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 3
- 229910052740 iodine Inorganic materials 0.000 description 3
- 239000011630 iodine Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- 238000003915 air pollution Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000010888 waste organic solvent Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3416—Regenerating or reactivating of sorbents or filter aids comprising free carbon, e.g. activated carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3483—Regenerating or reactivating by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
Definitions
- This invention relates to a method and apparatus for regenerating spent activated carbon
- Patent Application No. 10-1999-43104 This invention intends to improve over the two
- this invention intends to provide a method and apparatus for regenerating spent activated carbon facilitating the improvement of adsorption capacity
- spent activated carbon is heated to desorb pollutants from it, is further
- FIG. 1 illustrates the apparatus by this invention for regenerating the spent activated
- This invention relates to a method and apparatus for regenerating spent activated carbon
- the apparatus by this invention involves a combustion chamber
- Cooling facility is
- the spent activated carbon at a temperature of 800 ° C or lower. This ensures high
- combustion chamber is necessary to treat the toxic flue gas, but not in the case of this invention in which toxic flue gas from the reaction is introduced back into the
- a heat exchanger is provided to retrieve energy from
- Fig. 1 is a system diagram of the regeneration apparatus for spent activated carbon by
- combustion chamber utilizing the primary combustion chamber for the prevention of air
- Spent activated carbon from the input tank (1) is fed into the shell of the kiln (3) by the
- Burners (4a, 4b, 4c) are controlled by temperature
- Gas mixing tank (14) is used to mix carrier
- regenerator using the same test sample.
- Their process uses steam at a high temperature
- carbon dioxide was selected as the lone carrier gas
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
This invention relates to a regeneration process and facilities of spent activated carbons, the process being characterized by pyrolyzing in the low temperature range of between 200 °C and 800 °C, the facilities by comprising 1) a feeding section; 2) a reaction section in which pollutants attached to the spent activated carbons are removed by heat treatment, and which comprises a rotary kiln and a heating chamber, the heating chamber being located in the middle or downstream part of the rotary kiln and able to indirectly heat up the spent activated carbon traveling through the rotary kiln by heating its shells from outside; 3) a cooling section; and 4) CO2 or CO2 mixture gasstorages/supply section. The invention will prevent the loss and adsorption capacity reduction of activated carbon, will facilitate the improvement of hardness, recovery rate, and restoration of the adsorption capacity, and will enable the simplification of the facilities.
Description
REGENERATION PROCESS AND FACILITIES OF SPENT
ACTIVATED CARBONS
FIELD OF THE INVENTION
This invention relates to a method and apparatus for regenerating spent activated carbon
spent and discharged from water purification process, waste water treatment process, or
petrochemical process where the activated carbon is used to recover solvent or high
priced chemicals and so on, and more particularly, to a method and apparatus involving
indirect heating and pyrolysis at the temperature range between 200 °C and 800 °C
utilizing carrier gas containing carbon dioxide.
BACKGROUND OF THE INVENTION
In most of the conventional regeneration of activated carbon, the production process of
new activated carbon was utilized involving high pressure steam and very high
temperature exceeding 1000°C in rotary kilns or multi-hearth furnaces. Moreover,
regeneration was done without differentiating adsorbates characteristics, which results in
such serious problems as the weight loss of the activated carbon, reduced hardness and
adsorption quality of the activated carbon both caused by excessive oxidation and
subsequent destruction of surface pores. To remedy such problems in thermal
regeneration, this inventor previously applied for a patent for a method and apparatus for
regenerating spent activated carbon involving indirect heating utilizing heated air
(Korean Patent Application No.: 10-1999-0021994) and followed it up with another
patent application after verifying that using carbon dioxide as a carrier gas for
regeneration of spent activated carbon improves the regeneration efficiency (Korean
Patent Application No. 10-1999-43104). This invention intends to improve over the two
previous applications and improve the efficiency in commercial application.
In order to rectify the weight loss and the drop of adsorption capacity in the process of
thermal regeneration of spent activated carbons, there has been a lot of research and
development in the field of biological regeneration and chemical regeneration. In the
case of biological regeneration, however, it turned out that due to the long duration time
required for the cultivation of proper microbes and their stabilization and also due to the
fact that matters that can be decomposed by microbes are limited, it is neither
economically viable nor technically practicable. In the case of chemical regeneration,
there has been quite a few attempts for preliminary research. However, due to the cost of
solvents, the trouble associated with the disposal of the residual waste organic solvent
and the reduced adsorption capacity caused by the adsorption of the solvent during the
regeneration process, these efforts could not be commercialized.
DETAILED DESCRIPTION OF THE INVENTION
As stated above, this invention intends to provide a method and apparatus for
regenerating spent activated carbon facilitating the improvement of adsorption capacity
and recovery rate, and the prevention of the loss in the hardness of the activated carbon
overcoming the deficiency in the thermal regeneration of the spent activated carbon by
conventional technologies.
On top of that, it is also intended to provide a method that can improve the regeneration
efficiency by utilizing mixed carrier gases and regulating moisture content of the spent
activated carbon before the regeneration.
In order to achieve the above mentioned goals, the method of regenerating spent
activated carbon by this invention, in its regeneration process which includes drying step
and pyrolysis step, is characterized by desorption of pollutants from activated carbon
during the above drying step and pyrolysis step after being gradually heated by indirect
heat transfer, and also by addition of cooling step wherein hot activated carbon
regenerated in the preceding pyrolysis step is cooled.
Moreover, the regeneration apparatus of spent activated carbon by this invention is
characterized by inclusion of feeding section of spent activated carbon (1,2); reaction
section (3.9); and carrier gas supply section (13, 14). Above feeding section (1,2)
introduces spent activated carbon into the apparatus. Above reaction section (3,9)
wherein spent activated carbon is heated to desorb pollutants from it, is further
characterized by inclusion of a rotary kiln (3) through which spent activated carbon is
transported and a combustion chamber (9) in which the lower middle portion of the
above mentioned rotary kiln is externally heated to indirectly heat the spent activated
carbon traveling inside the rotary kiln.
In the above mentioned regeneration method, the carrier gas supply section(13, 14)
supplies carrier gases to the above mentioned reaction section.
In the above mentioned cooling section (5), activated carbon heated in the above
mentioned reaction section is cooled down.
The above mentioned regeneration method and apparatus of spent activated carbon is
also characterized by gradually heating the above mentioned spent activated carbon to
the temperature between 200 °C and 800 °C .
It is further characterized by utilizing carbon dioxide, mixture of carbon dioxide and
oxygen, or mixture of carbon dioxide and nitrogen as its carrier gas.
It is further still characterized by regulating the moisture content of the spent activated
carbon according to the characteristics of the adsorbates in the spent activated carbon
when introduced at the feeding section.
It is further still characterized by treating the hot gas produced in the pyrolysis step by
directing it back to the combustion chamber.
It is further still characterized by utilizing the above mentioned hot flue gas to preheat
the above mentioned carrier gas and the combustion air for the above mentioned
pyrolysis section.
It is further still characterized by cooling down the spent activated carbon processed
through the reaction section.
BRIEF DESCRIPTION OF THE DRAWING
Figure 1 illustrates the apparatus by this invention for regenerating the spent activated
carbon.
<Description ofMajor Parts>
1 : Spent Activated Carbon Input Tank
2: Screw Conveyor
3: Rotary Kiln
4a, 4b, and 4c: Burners
5: Cooling Section
6: Exhaust Outlet of Process Gas
7: Dust Removal Facility
8: Inlet of Process Gas into the Combustion Chamber
9: Combustion Chamber
10: Outlet of Flue Gas
11 : Primary Heat Exchanger
12: Secondary Heat Exchanger
13a, 13b: Carrier Gas Vessels
14: Gas Mixing tank
15: Exhaust Blower
16: Control Panel
17: Temperature Sensor
BEST MODE FOR CARRYING OUT THE INVENTION
This invention relates to a method and apparatus for regenerating spent activated carbon
utilizing carbon dioxide as the main carrier gas and pyrolysis process. The type of the
regeneration furnace is rotary kiln. Instead of directly heating the inside of the furnace
with burner flame as in the conventional processes, the external shell of the rotary kiln is
heated by burners and spent activated carbon traveling within the kiln is indirectly
heated by heat transfer. The apparatus by this invention involves a combustion chamber
provided around the lower middle section of the rotary kiln. Carrier gas of low
temperature containing carbon dioxide is introduced into the reaction section of the kiln,
which facilitates the gradual drying of the spent activated carbon over a certain period of
time, which results in the prevention of the rapid temperature rise of the spent activated
carbon, and thus minimization of adsorbates turning into char. Cooling facility is
provided at the end of the sealed moving devices to prevent regenerated hot activated
carbon from oxidation by contacting external atmosphere.
In most of the conventional thermal regeneration processes, spent activated carbon is
exposed directly to the bare flame from burners and gasification reaction in which highly
oxidative steam is used. These result in the loss of hardness and recovery rate of the
activated carbon. Gasification method creates additional pores in the activated carbon
and causes the weakening of pore structure and fails to achieve complete removal of the
adsorbates from the activated carbon.
Conversely, this invention takes care of these problems by utilizing carbon dioxide as
carrier gas; by controlling the moisture content of the spent activated carbon before
feeding them into the apparatus; and by regenerating spent activated carbon utilizing
pyrolysis process that enables the selective disintegration and removal of pollutants from
the spent activated carbon at a temperature of 800 °C or lower. This ensures high
recovery rate preventing weight loss and reduction of hardness.
In the conventional apparatuses, air pollution prevention device like a secondary
combustion chamber is necessary to treat the toxic flue gas, but not in the case of this
invention in which toxic flue gas from the reaction is introduced back into the
combustion chamber and completely burnt in the direct contact with flame that heats up
the shell of the kiln. And moreover, a heat exchanger is provided to retrieve energy from
the flue gas and preheat the carrier gas and the combustion air. This makes this invention
highly efficient in the field of energy saving, too. The regeneration apparatus by this
invention distances itself from conventional ones that utilize direct heating method and
steam as its oxidation agent, and has the advantage of efficient regeneration with the
help of simplified and automatized facilities.
The regeneration method by this invention is characterized by improving regeneration
efficiency by applying proper reaction temperatures and retention time according to
specific adsorbates; using either carbon dioxide, mixture of carbon dioxide and oxygen,
mixture of carbon dioxide and nitrogen, nitrogen or air as its carrier gas; maintaining the
carrier gas velocity at Reynolds number 500 or less; and controlling moisture content in
accordance with specific adsorbates in the spent activated carbon.
Reference is now made to the attached drawing to provide a detailed description of the
method and apparatus by this invention for regenerating spent activated carbon.
Fig. 1 is a system diagram of the regeneration apparatus for spent activated carbon by
this invention.
Compared with conventional ones, the regeneration apparatus by this invention places
emphasis on, firstly prevention of loss and reduction of hardness of the regenerated
activated carbon, secondly prevention of loss of adsorption capacity due to pore
destruction, thirdly simplification of the facilities by the elimination of the secondary
combustion chamber utilizing the primary combustion chamber for the prevention of air
pollution, and fourthly energy saving through the utilization of heat exchangers.
Following is a detailed description of the system of the spent activated carbon
regeneration apparatus by this invention
Spent activated carbon from the input tank (1) is fed into the shell of the kiln (3) by the
screw conveyer (2). The shell of the kiln is heated by burners (4a, 4b, 4c) properly
positioned to prevent rapid temperature rise of the spent activated carbon and maintain a
gradual temperature curve in the kiln. Burners (4a, 4b, 4c) are controlled by temperature
readings by the sensors (17) installed inside the kiln (3) shell. Heat indirectly transferred
through the shell is used as the energy source to remove the moisture and volatile and
involatile matters adsorbed on the spent activated carbon. Regenerated activated carbon
in the kiln is then transported through cooling system to cool it to a temperature, low
enough for contact with the atmosphere in the storage tank.
Gas generated in the process is discharged through the exhaust outlet (6) and introduced
into the combustion chamber (9) through its inlet (8) opening after it gets dedusted by
the dust removal facilities (7). In this step, the process gas from the rotary kiln is
exposed to the direct contact with the flame of the burners (4a, 4b, 4c) and completely
burnt. Flue gas with its toxic ingredients completely removed is then transported to the
primary heat exchanger (11) through the outlet (10) to heat up the carrier gas and then
transported again to the secondary heat exchanger (12) to impart its heat to the
combustion air for the burners (4a, 4b, 4c). Gas mixing tank (14) is used to mix carrier
gases stored in the carrier gas vessels to such a proportion as to maintain selective
oxidative atmosphere in the rotary kiln.
Temperatures of the burners (4a, 4b, 4c), feeding rate of spent activated carbon and r.p.m.
of the rotary kiln are controlled by preset figures in the PID controller of the control
panel(16), which enables the automatic operation of the apparatus.
Following is a typical embodiment example of the spent activated carbon regeneration
method using the apparatus by this invention:
Activated carbon used for solvent recovery for a period of 1 year in a petrochemical
process was taken as the test sample. An apparatus as illustrated on Fig.l was used.
Internal temperature inside the rotary kiln (13) was controlled to maintain a temperature
curve between 200 °C and 600 °C with the reaction time of 50 minutes. Mixture of
carbon dioxide and oxygen was used in the following proportions by volume:
CO2(9):O2(l), CO2(8):O2(2), CO2(7):O2(3), CO2(5):O2(5).
Table 1 shows the result of this test expressed in the iodine adsorption capacity, apparent
density and hardness. Testing method of KSM 1802 was used. Comparison was made
with new virgin activated carbon and regenerated activated carbon produced by a local
regenerator using the same test sample. Their process uses steam at a high temperature
( 1000 °C or more) with direct firing.
Table 1
As shown in the above table, regeneration by this invention produced much better results
than the conventional process and mixture of carbon dioxide and oxygen at the rate of
7:3 proved to be the best. Therefore, it is obvious that using a mixture of carbon dioxide
and oxygen at a proper rate as a carrier gas is more suitable for regeneration than the
l l
conventional process using steam at a high temperature. However, as the oxygen content
in the carrier gas increases, oxidation rate is increased and it results in the loss of
hardness. Therefore, it is important to decide proper oxygen content suitable for different
spent activated carbon.
Another test was made to verify the improvement of regeneration efficiency by
regulating moisture. Its result is shown in the table 2.
The same apparatus as in the previous test was used. Activated carbon used for a period
of 1 year for the treatment of chemical agents in a petrochemical process was taken as
the test sample in this case. Temperature in the kiln (3) was controlled to maintain a
curve between 200 °C and 600 °C with the retention time of 50 minutes. To study the
effects of different moisture contents, carbon dioxide was selected as the lone carrier gas,
with the moisture content varying at 20%, 30% and 40%. Regeneration efficiency
expressed in iodine adsorption capacity, apparent density and hardness was tested in
accordance with KSM 1802. Comparison was made with the results obtained from new
virgin sample and the same spent activated carbon sample completely dried before the
test.
Table 2
As can be seen from the table 2 above, as the moisture content increases up to a certain
range, regeneration efficiency improves, too. The moisture adsorbed on the activated
carbon is thought to be transformed to steam, which in turn dissolves the pollutants in
the activated carbon. Therefore, it is obvious that adding moisture to a proper content
helps to improve the regeneration efficiency. However, in case the moisture content
exceeds 30%, some residual moisture in the pores reduces the iodine adsorption capacity
and increases the apparent density. Therefore, it is important to run enough tests to
decide a suitable moisture content for the best regeneration.
As discussed and proven in the above, the regeneration method by this invention is
different from the conventional gasification method wherein spent activated carbon is
reactivated by directly exposing them to high temperature heat and steam. And more
particularly, it provides much better results than the conventional gasification method in
the hardness, recovery rate and adsorption capacity of the activated carbon, as pyrolysis
and indirect heating are used to selectively desorb only the pollutants from the spent
activated carbon at a temperature range lower than 800 °C without causing the loss of
activated carbon and reduction of the adsorption capacity, and as properly mixed carrier
gas facilitates the selective oxidative atmosphere. And the secondary combustion
chamber required for the prevention of air pollution in the case of conventional method
can be eliminated by putting the pyrolysis gas back into the main combustion chamber.
Claims
1. A method for regenerating spent activated carbon including a drying step and
a pyrolysis step, which is characterized by desorbing pollutants from spent activated
carbon through gradual drying and pyrolysis by indirect heat transfer.
2. The method for regenerating spent activated carbon according to claim 1,
wherein the drying step and pyrolysis step are characterized by the gradual heating of the
spent activated carbon to the temperature range between 200 °C to 800 °C .
3. The method for regenerating spent activated carbon according to claim 1,
which is characterized by the fact that gas containing carbon dioxide is utilized as a
carrier gas.
4. The method for regenerating spent activated carbon according to claim 3,
wherein the gas containing carbon dioxide is one selected from the group consisting of
carbon dioxide, mixture of carbon dioxide and oxygen, and mixture of carbon dioxide
and nitrogen.
5. The method for regenerating spent activated carbon according to claim 1,
which is characterized by the fact that moisture content of the spent activated carbon
introduced to the drying step is regulated according to the characteristics of adsorbates.
6. The method for regenerating spent activated carbon according to claim 1,
which is characterized by further comprising a flue gas treatment step for the
combustion of the hot flue process gas produced in the pyrolysis step by means of the
indirect heating of the drying and pyrolysis steps.
7. The method for regenerating spent activated carbon according to claim 6, that
is characterized by further comprising a step that preheats the carrier gas and combustion
air of the pyrolysis step by using the hot flue gas processed through the flue gas
treatment step.
8. The method for regenerating spent activated carbon according to claim 1, which
is characterized by further comprising a cooling section that cools down the spent
activated carbon processed through the reaction section.
9. An apparatus for regenerating spent activated carbon, which is characterized
by comprising:
a) a feeding section through which spent activated carbon is introduced;
b) a reaction section that desorbs pollutants by heating the introduced spent activated
carbon, which is characterized by comprising a rotary kiln through which spent activated
carbon travels and a combustion chamber that indirectly heats the spent activated carbon traveling through the rotary kiln by heating the outside of the rotary kiln in the middle
and lower part; and
c) a carrier gas supply section that supplies carrier gas to the reaction section.
10. The apparatus for regenerating spent activated carbon according to claim 9,
wherein the reaction section is heated gradually to the temperature range between 200 °C
and 800 °C .
11. The apparatus for regenerating spent activated carbon according to claim 9,
which is characterized by the fact that the carrier gas is one selected from the group
consisting of carbon dioxide, a mixture of carbon dioxide and oxygen, and a mixture of
carbon dioxide and nitrogen.
12. The apparatus for regenerating spent activated carbon according to claim 9,
which is characterized by the fact that the moisture content of the spent activated carbon
at the feeding section is regulated according to the nature of adsorbates.
13. The apparatus for regenerating spent activated carbon according to claim 9,
which is characterized by further comprising a flue gas treatment section which treats
the flue process gas discharged from the reaction section by putting the gas back into the
combustion chamber for combustion.
14. The apparatus for regenerating spent activated carbon according to claim 13,
which is characterized by further comprising a heat exchange section that preheats the
carrier gas and combustion air using the heat of the flue gas processed through the flue
gas treatment section.
15. The apparatus for regenerating spent activated carbon according to claim 9,
wherein the rotary kiln of the reaction section is equipped with temperature sensors
inside.
16. The apparatus for regenerating spent activated carbon according to claim 9,
which is characterized by further comprising a cooling section that cools down the spent
activated carbon processed through the reaction section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2002212795A AU2002212795A1 (en) | 2000-10-27 | 2001-10-26 | Regeneration process and facilities of spent activated carbons |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2000/63371 | 2000-10-27 | ||
| KR1020000063371A KR20020032743A (en) | 2000-10-27 | 2000-10-27 | Regeneration Process and Facilities of Spent Activated Carbon by Indirect Heating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002034385A1 true WO2002034385A1 (en) | 2002-05-02 |
Family
ID=19695705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2001/001818 WO2002034385A1 (en) | 2000-10-27 | 2001-10-26 | Regeneration process and facilities of spent activated carbons |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20020032743A (en) |
| AU (1) | AU2002212795A1 (en) |
| WO (1) | WO2002034385A1 (en) |
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| JP2014004511A (en) * | 2012-06-22 | 2014-01-16 | Daiki Ataka Engineering Co Ltd | Method for regenerating activated carbon |
| CN104390453A (en) * | 2014-11-21 | 2015-03-04 | 沈阳创联炉窑技术有限公司 | Process air control system of carbon rotary hearth calciner |
| JP2016150292A (en) * | 2015-02-17 | 2016-08-22 | 太平洋セメント株式会社 | Mercury recovery system and mercury recovery method |
| CN111167425A (en) * | 2019-12-26 | 2020-05-19 | 北京森麟技术有限公司 | Activated carbon regeneration treatment system and treatment process thereof |
| CN113856656A (en) * | 2021-10-27 | 2021-12-31 | 陕西延长石油（集团）有限责任公司 | Activated carbon regeneration device and method |
| CN114368751A (en) * | 2022-01-14 | 2022-04-19 | 浙江悦胜环境科技有限公司 | High-efficiency activated carbon activation process and activation device |
| BE1028710B1 (en) * | 2020-10-15 | 2022-05-18 | Desotec Nv | PROCEDURE FOR PROCESSING SATURATED ACTIVE CARBON IN A REACTIVATION OVEN |
| CN114671433A (en) * | 2022-05-07 | 2022-06-28 | 陕西延长石油（集团）有限责任公司 | Prediction method for carbonization temperature in thermal regeneration process of waste activated carbon based on TG-MS (transfer radical polymerization-Mass Spectrometry) continuous use |
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| CN114804277A (en) * | 2022-04-29 | 2022-07-29 | 西安交通大学 | Continuous sub/supercritical hydrothermal regeneration activated carbon reactor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100492070B1 (en) * | 2003-07-28 | 2005-06-02 | (주) 바두 | Activated carbon repreduction system for volatility organic compound exclusion |
| KR100846140B1 (en) * | 2008-01-30 | 2008-07-14 | 주식회사 한창엔텍 | Activated carbon recycling device |
| KR101276139B1 (en) * | 2011-04-06 | 2013-06-19 | (주) 바로젠테크 | Continuous Regenerator for Dry-Cleaning Filter Activated Carbon |
| KR101328093B1 (en) * | 2011-04-06 | 2013-11-13 | (주) 바로젠테크 | Continuous Regeneration Method for Dry-Cleaning Filter Activated Carbon |
| KR101466361B1 (en) * | 2013-03-28 | 2014-11-27 | 현대제철 주식회사 | Apparatus for recycleing activated carbon |
| CN108217651A (en) * | 2018-04-09 | 2018-06-29 | 福建省芝星炭业股份有限公司 | A kind of erosive parti gives up carbon regeneration method |
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| JPS51119697A (en) * | 1975-04-15 | 1976-10-20 | Nippon Furnace Kogyo Kaisha Ltd | Method and equipment for regeneration of active carbon |
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| JP2014004511A (en) * | 2012-06-22 | 2014-01-16 | Daiki Ataka Engineering Co Ltd | Method for regenerating activated carbon |
| CN103071474B (en) * | 2012-12-20 | 2015-10-21 | 北京国电清新环保技术股份有限公司 | The burnt resolver of a kind of powdery and analytic method thereof |
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| JP2016150292A (en) * | 2015-02-17 | 2016-08-22 | 太平洋セメント株式会社 | Mercury recovery system and mercury recovery method |
| CN111167425A (en) * | 2019-12-26 | 2020-05-19 | 北京森麟技术有限公司 | Activated carbon regeneration treatment system and treatment process thereof |
| BE1028710B1 (en) * | 2020-10-15 | 2022-05-18 | Desotec Nv | PROCEDURE FOR PROCESSING SATURATED ACTIVE CARBON IN A REACTIVATION OVEN |
| CN113856656A (en) * | 2021-10-27 | 2021-12-31 | 陕西延长石油（集团）有限责任公司 | Activated carbon regeneration device and method |
| CN113856656B (en) * | 2021-10-27 | 2024-04-02 | 陕西延长石油（集团）有限责任公司 | An activated carbon regeneration device and method |
| CN114368751A (en) * | 2022-01-14 | 2022-04-19 | 浙江悦胜环境科技有限公司 | High-efficiency activated carbon activation process and activation device |
| CN114804104A (en) * | 2022-02-21 | 2022-07-29 | 江苏联兴成套设备制造有限公司 | Organic fermentation reinforced CO 2 Method for regenerating waste active carbon by activating pore-forming |
| CN114804277A (en) * | 2022-04-29 | 2022-07-29 | 西安交通大学 | Continuous sub/supercritical hydrothermal regeneration activated carbon reactor |
| CN114804277B (en) * | 2022-04-29 | 2024-03-22 | 西安交通大学 | Continuous subcritical/supercritical hydrothermal regenerated active carbon reactor |
| CN114671433A (en) * | 2022-05-07 | 2022-06-28 | 陕西延长石油（集团）有限责任公司 | Prediction method for carbonization temperature in thermal regeneration process of waste activated carbon based on TG-MS (transfer radical polymerization-Mass Spectrometry) continuous use |
| CN116532105A (en) * | 2023-06-09 | 2023-08-04 | 东华工程科技股份有限公司 | A waste activated carbon regeneration treatment equipment and its process method |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20020032743A (en) | 2002-05-04 |
| AU2002212795A1 (en) | 2002-05-06 |
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