CA1160988A - Apparatus for regenerating active carbon - Google Patents
Apparatus for regenerating active carbonInfo
- Publication number
- CA1160988A CA1160988A CA000351085A CA351085A CA1160988A CA 1160988 A CA1160988 A CA 1160988A CA 000351085 A CA000351085 A CA 000351085A CA 351085 A CA351085 A CA 351085A CA 1160988 A CA1160988 A CA 1160988A
- Authority
- CA
- Canada
- Prior art keywords
- active carbon
- desorption
- carrier passage
- particles
- adsorbed material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 47
- 230000001172 regenerating effect Effects 0.000 title claims description 9
- 238000003795 desorption Methods 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 abstract description 15
- 230000008929 regeneration Effects 0.000 abstract description 9
- 238000011069 regeneration method Methods 0.000 abstract description 9
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 239000000843 powder Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 5
- 238000000746 purification Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 230000003213 activating effect Effects 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/087—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy
- B01J19/088—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electric or magnetic energy giving rise to electric discharges
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/354—After-treatment
- C01B32/36—Reactivation or regeneration
- C01B32/366—Reactivation or regeneration by physical processes, e.g. by irradiation, by using electric current passing through carbonaceous feedstock or by using recyclable inert heating bodies
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Abstract of the Disclosure The disclosure teaches an apparatus for re-generating active carbon, in which a pulse voltage is applied so as to generate spark discharges between particles of used active carbon and desorb the ad-sorbed material. Thus a greater amount of spark dis-charge is generated and the desorption of the adsorbed material can be performed more easily and efficiently.
And by adjusting pulse width, temperature control dur-ing the operation is made possible, therefore, useful adsorbed material can be recovered without decomposition, and harmful and useless substance can be decomposed or burnt out at elevated temperature. In the continuous regeneration apparatus, a number of baffle boards are provided on the suitable portion of the swinging carrier path of the active carbon to intercept the fed active carbon particles temporarily and pass the same selec-tively according to the order of desorption degree, to make the process of desorption more perfectly.
And by adjusting pulse width, temperature control dur-ing the operation is made possible, therefore, useful adsorbed material can be recovered without decomposition, and harmful and useless substance can be decomposed or burnt out at elevated temperature. In the continuous regeneration apparatus, a number of baffle boards are provided on the suitable portion of the swinging carrier path of the active carbon to intercept the fed active carbon particles temporarily and pass the same selec-tively according to the order of desorption degree, to make the process of desorption more perfectly.
Description
1 1 6~88 This invention relates to an apparatus for regenerating used active carbon.
The purification treatment of waste gas or water discharged from factories and other facilities has been an important problem for a long time, and recently it became a more urgent problem, as the polu-tion problem became a subject of much discussion.
Many processes of the treating waste gas or water have been proposed, but among these a process of using ac-tive carbon is widely adopted.
Active carbon is a favorable reagent becauseof its strong adsorptive power, but it must be regen-erated in case of reuse, when it becomes inactive as the adsorption goes on and saturated with adsorbed matter. In the conventional method for activating and regenerating used active carbon, the same is heated, as for instance, in an oil fired rotary kiln at a temp-erature of 800C or higher, and the water vapor is introduced concurrently to regenerate the carbon by a process of water gas reaction.
~.
.
' 1 1 60~8~
However, this method requires a long time heating at such high temperature, so that it needs a considerable amount of fuel, as well as, an expensive installation cost.
Further, there is an excessive burning loss of the active carbon There is also an use of Juole's heat generated by conducting electric current through the active carbon for heating the same and desorbing or liberating adsorbed material, but this method also needs e~pensive installation cost, especially for the electrical equipment, as it requires very heavy current.
After repeating many experiments to find out an efficient and economical method for regenerating used active carbon, one of the inventors of the present invention develop-ed and disclosed an apparatus, in which a vibration is applied to the active carbon powder while conducting electric current so as to generate spark discharge 6 between particles of the active carbon and liberate the adsorbed material.
(For reference:
Publication of Japanese Patent Application Disclosure No.52-6393 and Japanese Utility Model Registration Application . Disclosure No.52-14351) However, it was found that this process still has the following disadvantages:
,:.
1 1 6~88 With carbon particles which contact longer time with each other, Joule's heat generates locally and consumes much amount of current, and this causes lowering of efficiency. This also causes difficulties in controll-ing temperature during the operation, and becomes diff-icult to recover liberated or desorbed material, even if it is useful, as it decomposes at such high temper-ature caused by Joule's heat.
The present invention relates particularly to improvements in an apparatus for carrying out the above-mentioned spark discharge process for activating and regenerating used active carbon, and characterized in that the apparatus includes means for applying a pulse voltage between the used active carbon particles so as to generate spark discharges therebetween and desorb the adsorbed material. Thus the occurrence of the spark discharge between carbon particles increases extremely and the generation of Joule's heat decreases, so that desorption of the adsorbed material can be performed more easily and efficiently.
Another advantage of this apparatus is to be able to control temperature during the desorption by adjusting pulse width of the applied voltage, i.e., if the adsorbed material is useful, it can be recovered without decomposition, by desorbing at relatively low temperature. On the contrary, if the adsorbed material is harmful and useless, it can be decomposed or burnt out on the place, by desorbing at high temperature. Further, by applying a swinging motion to the carbon particles additionally, occurrence of the spark discharges, accordingly the desorption of t:he adsorbed material can be accelerated. Further in a continuous regeneration apparatus of the present inven-tion, a number of baffle boards are provided on the suitable portion of swinging carrier passage of the active carbon particles so as to intercept the same tem-porarily and pass them selectively by overflowing from the lightened particles due to desorption in order, to make desorption process more perfectly. The present in-vention will be described in more details with reference to the accompanying drawings.
Accordingly, in accordance with the invention, there is provided an apparatus for regenerating active carbon. The apparatus includes a box type desorption tank for desorbing adsorbed material. The bottom of the tank is slanted lengthwise and has a channel forming a carrier passage of the active carbon formed on the bottom with an inlet port on the upper end and an outlet port on the lower end thereof. A swinging means swings the desorption tank to cause flow of the active carbon particles from the inlet port to the outlet port within the carrier passage. Electrodes means are provided within and along the carrier passage for applying a spark discharge voltage to the carbon particles to desorb adsorbed material therein. Intercepting means are pro-vided at suitable length intervals in the carrier passage for intercepting flow of active carbon in the carrier passage and overflowing the lightened particles caused by the desorption in turn. A generating apparatus gene-rates pulse voltage to be applied to the electrode means.
Fig. 1 is a front view illustrating an embo-diment of the apparatus for regenerating active carbon according to the present invention' 1 ~ 60988 Fig. 2 is a side elevational view of the appa-ratus shown in Fig. 1, Fig. 3 is an enlarged cross-sectional view, taken along line III-III of Fig. 1, Fig. 4 is a schematic view showing an example of waste water purification apparatus using the regener-ation apparatus according to the present invention.
-4a-.~
1 I B~988 Fig.5 is an example of wave forms of the applied voltage during the process of the present invention.
Best Mode for Carrying Out the Invention AS seen in Figures 1-3, the apparatus for regenerating active carbon includes a box type desorption tank 1, the bottom of which is slanted lengthwise at a suitable angle, and inside surface thereof is lined with refractory material
The purification treatment of waste gas or water discharged from factories and other facilities has been an important problem for a long time, and recently it became a more urgent problem, as the polu-tion problem became a subject of much discussion.
Many processes of the treating waste gas or water have been proposed, but among these a process of using ac-tive carbon is widely adopted.
Active carbon is a favorable reagent becauseof its strong adsorptive power, but it must be regen-erated in case of reuse, when it becomes inactive as the adsorption goes on and saturated with adsorbed matter. In the conventional method for activating and regenerating used active carbon, the same is heated, as for instance, in an oil fired rotary kiln at a temp-erature of 800C or higher, and the water vapor is introduced concurrently to regenerate the carbon by a process of water gas reaction.
~.
.
' 1 1 60~8~
However, this method requires a long time heating at such high temperature, so that it needs a considerable amount of fuel, as well as, an expensive installation cost.
Further, there is an excessive burning loss of the active carbon There is also an use of Juole's heat generated by conducting electric current through the active carbon for heating the same and desorbing or liberating adsorbed material, but this method also needs e~pensive installation cost, especially for the electrical equipment, as it requires very heavy current.
After repeating many experiments to find out an efficient and economical method for regenerating used active carbon, one of the inventors of the present invention develop-ed and disclosed an apparatus, in which a vibration is applied to the active carbon powder while conducting electric current so as to generate spark discharge 6 between particles of the active carbon and liberate the adsorbed material.
(For reference:
Publication of Japanese Patent Application Disclosure No.52-6393 and Japanese Utility Model Registration Application . Disclosure No.52-14351) However, it was found that this process still has the following disadvantages:
,:.
1 1 6~88 With carbon particles which contact longer time with each other, Joule's heat generates locally and consumes much amount of current, and this causes lowering of efficiency. This also causes difficulties in controll-ing temperature during the operation, and becomes diff-icult to recover liberated or desorbed material, even if it is useful, as it decomposes at such high temper-ature caused by Joule's heat.
The present invention relates particularly to improvements in an apparatus for carrying out the above-mentioned spark discharge process for activating and regenerating used active carbon, and characterized in that the apparatus includes means for applying a pulse voltage between the used active carbon particles so as to generate spark discharges therebetween and desorb the adsorbed material. Thus the occurrence of the spark discharge between carbon particles increases extremely and the generation of Joule's heat decreases, so that desorption of the adsorbed material can be performed more easily and efficiently.
Another advantage of this apparatus is to be able to control temperature during the desorption by adjusting pulse width of the applied voltage, i.e., if the adsorbed material is useful, it can be recovered without decomposition, by desorbing at relatively low temperature. On the contrary, if the adsorbed material is harmful and useless, it can be decomposed or burnt out on the place, by desorbing at high temperature. Further, by applying a swinging motion to the carbon particles additionally, occurrence of the spark discharges, accordingly the desorption of t:he adsorbed material can be accelerated. Further in a continuous regeneration apparatus of the present inven-tion, a number of baffle boards are provided on the suitable portion of swinging carrier passage of the active carbon particles so as to intercept the same tem-porarily and pass them selectively by overflowing from the lightened particles due to desorption in order, to make desorption process more perfectly. The present in-vention will be described in more details with reference to the accompanying drawings.
Accordingly, in accordance with the invention, there is provided an apparatus for regenerating active carbon. The apparatus includes a box type desorption tank for desorbing adsorbed material. The bottom of the tank is slanted lengthwise and has a channel forming a carrier passage of the active carbon formed on the bottom with an inlet port on the upper end and an outlet port on the lower end thereof. A swinging means swings the desorption tank to cause flow of the active carbon particles from the inlet port to the outlet port within the carrier passage. Electrodes means are provided within and along the carrier passage for applying a spark discharge voltage to the carbon particles to desorb adsorbed material therein. Intercepting means are pro-vided at suitable length intervals in the carrier passage for intercepting flow of active carbon in the carrier passage and overflowing the lightened particles caused by the desorption in turn. A generating apparatus gene-rates pulse voltage to be applied to the electrode means.
Fig. 1 is a front view illustrating an embo-diment of the apparatus for regenerating active carbon according to the present invention' 1 ~ 60988 Fig. 2 is a side elevational view of the appa-ratus shown in Fig. 1, Fig. 3 is an enlarged cross-sectional view, taken along line III-III of Fig. 1, Fig. 4 is a schematic view showing an example of waste water purification apparatus using the regener-ation apparatus according to the present invention.
-4a-.~
1 I B~988 Fig.5 is an example of wave forms of the applied voltage during the process of the present invention.
Best Mode for Carrying Out the Invention AS seen in Figures 1-3, the apparatus for regenerating active carbon includes a box type desorption tank 1, the bottom of which is slanted lengthwise at a suitable angle, and inside surface thereof is lined with refractory material
2, and a channel form carrier passage "a" is formed thereon for carrying active carbon powders. Refractory mo~tar such as LIGHT CASTER or PLYCAST~R sold by PLIBRICO CO. or the like refractory material of good insulation quality may by used for the lining material 2. Carbon electrodes 3,
3--- of plate form are provided within and along said carrier passage "a", each disposed opposedly. Carbon rods may be used also for the electrodes 3. A number of baffle boards
4, 4--- of suitable height and made'of the similar refractory material as lining material 2, are provided within the carrier passage "a". The same are disposed suitably spaced ~20 apart with each other. S is a dehydrator of the used active carbon, having screen 5' for filtering water. 6 is an - outlet port of the regenerated active carbon. 7 is an exhaust port of the desorbed gas. 8 is electrode terminal.
Thro~gh bearings 12, 12, the lower end of the slanted bottom of desorption tank 1 is mounted on an eccentric journal 11' 1 1 6~8 of a rotary shaft 11 which is supported on a base frame 9 through bearings 10, 10. The rotary shaft 11 is connected with a motor 16 through a pulley 13 mounted on the shaft, belt 14 and a small pulley 15 of the motor.
The upper end of the slanted bottom of tank 1 is supported on the base frame 9 through a spring 17. The apparatus will be operated as follows:
By starting the motor 16, desorption tank 1 may swing vertically and longitudinally, while each part thereof moving circularly. Then by charging used active carbon into the dehydrator 5, the wet carbon powders are dehydrated by the screen 5' and fed on upper end of the carrier passage "a" through opening 18. The powders advance downwards on the slanted passage "a" while being intercepted by the baffle boards 4, 4, -- temporarily, and discharged from the outlet port 6. During this operation, pulse voltage of the form as shown in Fig.5 is applied between the electrodes 3, 3---. By the application of pulse voltage, or by the combination of pulse voltage and swinging motion of the passage "a", a greater amount of spark discharges are gener-ated between active carbon particles, so that the desorption is accelerated and can be accomplished within a very short period of several to a dozen or so minutes. For generating pulse voltage, thylistor chopper or thyIistor Leonard system, as for example, may be used. (In this example, thylistor 1 1~û98~
chopper system was used.) Further, one of the eminent advantages of this method is to be able to control temperature during the desorbing process, by adjusting pulse width "t".
For example, with the pulse width of about 5-10 microsec. at an applied voltage of 200-500V, the temperature rise is minimlzed, so that the useful adsorbed material can be recovered as it is desorbed without decomposition.
Further, loss of the carbon electrodes may be reduced to about 1/100 of that in the prior art. On the contrary, with the pulse width of about 1-10 millisec., temperature rises up to 600-700C within several minutes, so that the harmful substance can be decomposed and burnt out immediately on desorption. Either A.C. wave form as shown in Fig.5, ~S or D.C. wave form without changing of polarity may be used for the pulse voltage. The used active carbon which has been fed on the carrier path-"a" ana intercepted by each baffle board 4, desorb the adsorbed material while repeating swinging motion. And lightened particles due to desorption move upwards and overflow the board 4, and then intercepted by the next board, thus the desorption goes on progressively, and, at the final stage, the active carbon of almost completely activated and regenerated are taken out from the outlet port 6. This desorption tank 1 with baffle boards 4, 4 can be used also for the regeneration apparatus of the above-1 1 6~988 mentioned prior art in which the usual-not pulsative-voltage application and vibration are used. Fig.4 shows one example of continuous purification apparatus of the waste water, in which the regenera~ion apparatus according S to the present invention is used. In the figure, 19 is an adsorption tank containing active carbon 20 as adsorbent.
21 is a dryer, 22 is a regeneration apparatus of the present invention, 23 is a storage tank of the regenerated active carbon, 24 is a feed pump. In this example, the dryer 21 is of the similar construction as regeneration apparatus 22, and provided with dehydrator 25 on the upper part thereof, but drying oven with an usual heating means such as hot blasting may be used also.
The apparatus will be operated as follows:
The waste water which flowed into the tank 19 through an inlet port 26, passes through filter screen 27 and removed of the harmful material by the adsorption while passing through layers of the adsorbent 20, and discharged from outlet port 28 as purified water. Used active carbon 20 is discharged through a discharge port 29 provided on the bottom of the tank 19, about constant amount at every predetermined time intervals by means of an automatic dis-charging apparatus 30. The powder 20 is dehydrated at the dehydrator 25, then dried at the dryer 21. If the powder 20 is accompanied with sludges, the same may be carbonized 1 ~ ~Q~88 or burnt out at this stage. The dried powder 20 is then activated and regenerated at the regeneration apparatus 22 in the similar manner as described above, and sent to the storage tank 23 as regenerated active carbon powder, and sent back to the adsorption tank 19 by means of feed pump 24.
Thus, by repeating these processes, purification of the water as well as regeneration of the used active carbon can be performed automatically and continuously without stopping the flow of water.
As mentioned above, in the present invention, by apply-ing pulse voltage a greater amount of spark discharge is generated so that the desorption of adsorbed material can be performed more easily and efficiently. Another advantage of the present invention is that by adjusting pulse width, it becomes possible to control temperature during the desorp-tion. Further, in the continuous regeneration apparatus, by providing baffIe boards within the swinging carrier path, it also becomes possible to pass the active carbon particles selectively according to the order of desorption degree.
As a result, according to the method and apparatus of the present invention the desorption is exceedingly accelerated and highly activated active carbon can be obtained within a relatively short time interval. In the above examples, ad~ustment of the pulse width was performed without changing cycles. Cycles of 50-400Hz were used in the examples.
Thro~gh bearings 12, 12, the lower end of the slanted bottom of desorption tank 1 is mounted on an eccentric journal 11' 1 1 6~8 of a rotary shaft 11 which is supported on a base frame 9 through bearings 10, 10. The rotary shaft 11 is connected with a motor 16 through a pulley 13 mounted on the shaft, belt 14 and a small pulley 15 of the motor.
The upper end of the slanted bottom of tank 1 is supported on the base frame 9 through a spring 17. The apparatus will be operated as follows:
By starting the motor 16, desorption tank 1 may swing vertically and longitudinally, while each part thereof moving circularly. Then by charging used active carbon into the dehydrator 5, the wet carbon powders are dehydrated by the screen 5' and fed on upper end of the carrier passage "a" through opening 18. The powders advance downwards on the slanted passage "a" while being intercepted by the baffle boards 4, 4, -- temporarily, and discharged from the outlet port 6. During this operation, pulse voltage of the form as shown in Fig.5 is applied between the electrodes 3, 3---. By the application of pulse voltage, or by the combination of pulse voltage and swinging motion of the passage "a", a greater amount of spark discharges are gener-ated between active carbon particles, so that the desorption is accelerated and can be accomplished within a very short period of several to a dozen or so minutes. For generating pulse voltage, thylistor chopper or thyIistor Leonard system, as for example, may be used. (In this example, thylistor 1 1~û98~
chopper system was used.) Further, one of the eminent advantages of this method is to be able to control temperature during the desorbing process, by adjusting pulse width "t".
For example, with the pulse width of about 5-10 microsec. at an applied voltage of 200-500V, the temperature rise is minimlzed, so that the useful adsorbed material can be recovered as it is desorbed without decomposition.
Further, loss of the carbon electrodes may be reduced to about 1/100 of that in the prior art. On the contrary, with the pulse width of about 1-10 millisec., temperature rises up to 600-700C within several minutes, so that the harmful substance can be decomposed and burnt out immediately on desorption. Either A.C. wave form as shown in Fig.5, ~S or D.C. wave form without changing of polarity may be used for the pulse voltage. The used active carbon which has been fed on the carrier path-"a" ana intercepted by each baffle board 4, desorb the adsorbed material while repeating swinging motion. And lightened particles due to desorption move upwards and overflow the board 4, and then intercepted by the next board, thus the desorption goes on progressively, and, at the final stage, the active carbon of almost completely activated and regenerated are taken out from the outlet port 6. This desorption tank 1 with baffle boards 4, 4 can be used also for the regeneration apparatus of the above-1 1 6~988 mentioned prior art in which the usual-not pulsative-voltage application and vibration are used. Fig.4 shows one example of continuous purification apparatus of the waste water, in which the regenera~ion apparatus according S to the present invention is used. In the figure, 19 is an adsorption tank containing active carbon 20 as adsorbent.
21 is a dryer, 22 is a regeneration apparatus of the present invention, 23 is a storage tank of the regenerated active carbon, 24 is a feed pump. In this example, the dryer 21 is of the similar construction as regeneration apparatus 22, and provided with dehydrator 25 on the upper part thereof, but drying oven with an usual heating means such as hot blasting may be used also.
The apparatus will be operated as follows:
The waste water which flowed into the tank 19 through an inlet port 26, passes through filter screen 27 and removed of the harmful material by the adsorption while passing through layers of the adsorbent 20, and discharged from outlet port 28 as purified water. Used active carbon 20 is discharged through a discharge port 29 provided on the bottom of the tank 19, about constant amount at every predetermined time intervals by means of an automatic dis-charging apparatus 30. The powder 20 is dehydrated at the dehydrator 25, then dried at the dryer 21. If the powder 20 is accompanied with sludges, the same may be carbonized 1 ~ ~Q~88 or burnt out at this stage. The dried powder 20 is then activated and regenerated at the regeneration apparatus 22 in the similar manner as described above, and sent to the storage tank 23 as regenerated active carbon powder, and sent back to the adsorption tank 19 by means of feed pump 24.
Thus, by repeating these processes, purification of the water as well as regeneration of the used active carbon can be performed automatically and continuously without stopping the flow of water.
As mentioned above, in the present invention, by apply-ing pulse voltage a greater amount of spark discharge is generated so that the desorption of adsorbed material can be performed more easily and efficiently. Another advantage of the present invention is that by adjusting pulse width, it becomes possible to control temperature during the desorp-tion. Further, in the continuous regeneration apparatus, by providing baffIe boards within the swinging carrier path, it also becomes possible to pass the active carbon particles selectively according to the order of desorption degree.
As a result, according to the method and apparatus of the present invention the desorption is exceedingly accelerated and highly activated active carbon can be obtained within a relatively short time interval. In the above examples, ad~ustment of the pulse width was performed without changing cycles. Cycles of 50-400Hz were used in the examples.
Claims (2)
1. An apparatus for regenerating active carbon comprising: a box type desorption tank for desorbing adsorbed material, the bottom of which being slanted lengthwise and having a channel form a carrier passage of the active carbon formed on said bottom with an inlet port on the upper end and an outlet port on the lower end thereof, a swinging means to swing said desorption tank to cause flow of the active carbon particles from said inlet port to said outlet port within said carrier passage: electrode means provided within and along said carrier passage for applying a spark discharge voltage to said carbon particles to desorb adsorbed material therein, intercepting means provided at suitable length intervals in said carrier passage for intercepting flow of active carbon in said carrier passage and overflowing the lightened particles caused by said desorption in turn:
and a generating apparatus for generating pulse voltage to be applied to said electrode means.
and a generating apparatus for generating pulse voltage to be applied to said electrode means.
2. The apparatus claimed in claim 1 wherein:
said generating apparatus is capable of adjusting pulse width.
said generating apparatus is capable of adjusting pulse width.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP1979/000119 WO1980002553A1 (en) | 1979-05-11 | 1979-05-11 | Method of regeneration of activated carbon and apparatus therefor |
| JP79/00119 | 1979-05-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1160988A true CA1160988A (en) | 1984-01-24 |
Family
ID=13677656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000351085A Expired CA1160988A (en) | 1979-05-11 | 1980-05-01 | Apparatus for regenerating active carbon |
Country Status (11)
| Country | Link |
|---|---|
| AU (1) | AU5820580A (en) |
| BE (1) | BE883200A (en) |
| BR (1) | BR7909006A (en) |
| CA (1) | CA1160988A (en) |
| DE (1) | DE2953672A1 (en) |
| DK (1) | DK6881A (en) |
| FR (1) | FR2455922A1 (en) |
| GB (1) | GB2060595A (en) |
| IT (1) | IT1209327B (en) |
| NL (1) | NL8002677A (en) |
| WO (1) | WO1980002553A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU7033681A (en) * | 1981-04-10 | 1982-11-04 | Sasaki, Y. | Apparatus for regenerating activated carbon |
| DE3141906A1 (en) * | 1981-10-08 | 1983-04-21 | Degussa Ag, 6000 Frankfurt | METHOD AND DEVICE FOR CARRYING OUT GAS / SOLID REACTIONS, IN PARTICULAR FOR ACTIVATING AND REACTIVATING ACTIVE CARBON |
| DE4104513C2 (en) * | 1990-02-14 | 1996-11-28 | Chmiel Horst | Adsorber |
| CN110538647A (en) * | 2019-10-14 | 2019-12-06 | 中国科学院过程工程研究所 | An activated carbon desulfurization and denitrification regeneration system |
| CN111235403B (en) * | 2020-03-01 | 2022-06-03 | 长春黄金研究院有限公司 | Method for reducing high-grade powdered carbon in desorption electrolysis section |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS526393A (en) * | 1975-07-05 | 1977-01-18 | Mihara Kankyo Gijutsu Kk | Regenerator of active carbon |
| JPS5342194A (en) * | 1976-09-29 | 1978-04-17 | Chubu Kk | Apparatus for continuously regenerating active carbon |
| JPS546892A (en) * | 1977-06-20 | 1979-01-19 | Minoru Tanmachi | Method and apparatus for regenerating active carbon |
-
1979
- 1979-05-11 GB GB8100003A patent/GB2060595A/en not_active Withdrawn
- 1979-05-11 WO PCT/JP1979/000119 patent/WO1980002553A1/en not_active Ceased
- 1979-05-11 BR BR7909006A patent/BR7909006A/en unknown
- 1979-05-11 DE DE792953672T patent/DE2953672A1/en not_active Withdrawn
-
1980
- 1980-05-01 CA CA000351085A patent/CA1160988A/en not_active Expired
- 1980-05-08 AU AU58205/80A patent/AU5820580A/en not_active Abandoned
- 1980-05-09 IT IT8021961A patent/IT1209327B/en active
- 1980-05-09 BE BE2/58556A patent/BE883200A/en unknown
- 1980-05-09 NL NL8002677A patent/NL8002677A/en not_active Application Discontinuation
- 1980-05-12 FR FR8010570A patent/FR2455922A1/fr not_active Withdrawn
-
1981
- 1981-01-08 DK DK6881A patent/DK6881A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BR7909006A (en) | 1981-04-14 |
| AU5820580A (en) | 1980-11-13 |
| NL8002677A (en) | 1980-11-13 |
| DE2953672A1 (en) | 1982-01-28 |
| IT1209327B (en) | 1989-07-16 |
| IT8021961A0 (en) | 1980-05-09 |
| WO1980002553A1 (en) | 1980-11-27 |
| BE883200A (en) | 1980-09-01 |
| FR2455922A1 (en) | 1980-12-05 |
| GB2060595A (en) | 1981-05-07 |
| DK6881A (en) | 1981-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3608273A (en) | Apparatus and process for desorption of filter beds by electric current | |
| US5482538A (en) | Process for removing undesirable constituents from a gas | |
| KR100283943B1 (en) | Method and apparatus for removing particles from internal combustion engine exhaust | |
| RU2153923C2 (en) | Method of isolating substances from a gaseous medium involving dry adsorption technique | |
| DE4104513C2 (en) | Adsorber | |
| JP2001508532A (en) | Air purification method and purification means using regenerable activated carbon cloth adsorbent | |
| KR960003235B1 (en) | Activated carbon, preparation method thereof and adsorption using activated carbon | |
| Zaini et al. | Microwave-induced zinc chloride activated palm kernel shell for dye removal | |
| CA1160988A (en) | Apparatus for regenerating active carbon | |
| CN115671972A (en) | Method for treating waste gas and waste smoke of asphalt station | |
| GB1567129A (en) | Heating of coal with microwave energy | |
| US4398295A (en) | Apparatus for regenerating activated carbon | |
| KR101767787B1 (en) | Method for recycling activated carbon and aparatus for recycling activated carbon using the same | |
| JP3971492B2 (en) | Desorption / regeneration method using non-thermal plasma | |
| KR100343804B1 (en) | A vocs abatement system for spray booth and a method regenerating activated-carbon filter | |
| WO1982003619A1 (en) | Apparatus for regenerating activated carbon | |
| KR830002370B1 (en) | Regeneration device of activated carbon | |
| CN117983006A (en) | High-pressure degradation device and degradation method for asphalt smoke | |
| CN101549283A (en) | An in situ regeneration method of activated carbon fiber | |
| JP4421709B2 (en) | Activated carbon microwave heating device | |
| CN85100619A (en) | Gac forced electric discharge reactivating technique and device thereof | |
| JPH09248425A (en) | Dioxine removing material, dioxine removing method, exhaust gas treatment equipment and dioxine removing material-regenerating method | |
| JPS5775121A (en) | Method and apparatus for treating waste gas at coating | |
| JPS58159888A (en) | Active carbon adsorbing tower having regenerating apparatus | |
| RU2230792C1 (en) | Apparatus for regeneration of activated granulated carbon used for purification of sugar-containing solutions |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |