CN108144595B - Activated carbon regeneration system and method - Google Patents
Activated carbon regeneration system and method Download PDFInfo
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- CN108144595B CN108144595B CN201711435122.3A CN201711435122A CN108144595B CN 108144595 B CN108144595 B CN 108144595B CN 201711435122 A CN201711435122 A CN 201711435122A CN 108144595 B CN108144595 B CN 108144595B
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 300
- 238000011069 regeneration method Methods 0.000 title claims abstract description 142
- 230000008929 regeneration Effects 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 26
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 113
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 66
- 238000011282 treatment Methods 0.000 claims abstract description 37
- 238000009210 therapy by ultrasound Methods 0.000 claims abstract description 36
- 230000003647 oxidation Effects 0.000 claims abstract description 27
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 27
- 230000003197 catalytic effect Effects 0.000 claims abstract description 21
- 239000000126 substance Substances 0.000 claims abstract description 21
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 10
- 238000005273 aeration Methods 0.000 claims description 27
- 238000006243 chemical reaction Methods 0.000 claims description 27
- 238000011001 backwashing Methods 0.000 claims description 21
- 239000004575 stone Substances 0.000 claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 11
- 239000001301 oxygen Substances 0.000 claims description 11
- 229910052760 oxygen Inorganic materials 0.000 claims description 11
- 238000011068 loading method Methods 0.000 claims description 9
- 239000003054 catalyst Substances 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims 3
- 239000000945 filler Substances 0.000 claims 2
- 239000002351 wastewater Substances 0.000 abstract description 6
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000006731 degradation reaction Methods 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 230000001172 regenerating effect Effects 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 description 8
- 230000003247 decreasing effect Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 238000004042 decolorization Methods 0.000 description 2
- 230000000593 degrading effect Effects 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 238000006385 ozonation reaction Methods 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002306 biochemical method Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229960000907 methylthioninium chloride Drugs 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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Classifications
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- 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
- B01J20/3441—Regeneration or reactivation by electric current, ultrasound or irradiation, e.g. electromagnetic radiation such as X-rays, UV, light, microwaves
-
- 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
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3475—Regenerating or reactivating using a particular desorbing compound or mixture in the liquid phase
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
Abstract
The invention relates to an active carbon regeneration system, which comprises an ultrasonic treatment device, an active carbon regeneration container, an ejector, an ozone generator and an ozone catalytic oxidation tower. The system and the method for regenerating the activated carbon can realize the synchronous degradation of the desorbed substances in the regeneration process of the activated carbon, simultaneously, no regeneration water is added in the treatment process, the generation of waste water is reduced, and the continuous automatic low-cost regeneration treatment of the activated carbon is realized.
Description
Technical Field
The invention relates to the field of adsorbent regeneration, in particular to an active carbon regeneration system and method.
Background
The active carbon is a substance with wide application, and has wide application in aspects of deodorization, decoloration, poison prevention and the like. The industrial or civil field mainly utilizes the porous adsorption capacity of the activated carbon to selectively adsorb certain substances in a gas phase or liquid phase system, and then the substances are separated from the system. For example, in gas masks and activated carbon masks, the adsorption characteristics of activated carbon are utilized to selectively adsorb harmful substances in the air, thereby achieving the purpose of air purification. In the food industry, for example, the selective adsorption of activated carbon is used for decolorization. The activated carbon also has wide application in the fields of environmental protection and water treatment, for example, free chlorine in water can be adsorbed and removed by using the activated carbon.
The regeneration method of the activated carbon with saturated adsorption mainly comprises the following steps: high-temperature treatment, namely desorption of substances adsorbed in the activated carbon by high-temperature heating or high-temperature steam, wherein high-temperature regeneration is the most widely applied method in the field of activated carbon regeneration at present; ultrasonic treatment is a method for realizing regeneration by using the principle of ultrasonic vibration; in addition, electrochemical methods and biochemical methods are available. However, most of these regeneration methods forcibly replace or release the substances adsorbed in the activated carbon, and do not achieve simultaneous degradation and removal of the substances adsorbed in the activated carbon. In addition, another disadvantage of the process involving water treatment is that the adsorbed substances on the activated carbon will soon form a dynamic equilibrium with the activated carbon in the wastewater, and the regeneration water must be replaced without interruption if the equilibrium is to be shifted in the desired desorption direction. As a result, a large amount of waste water is generated.
Disclosure of Invention
Based on this, it is necessary to provide an activated carbon regeneration system and method to achieve the synchronous degradation of the desorbed substances during the activated carbon regeneration process and reduce the generation of wastewater.
An active carbon regeneration system comprises an ultrasonic treatment device, an active carbon regeneration container, an ejector, an ozone generator and an ozone catalytic oxidation tower;
the activated carbon regeneration container is used for placing activated carbon to be treated;
the ultrasonic treatment device comprises an ultrasonic transducer which is arranged in the activated carbon regeneration container;
the ejector is provided with a jet inlet, a jet outlet and an air inlet, the ejector is communicated with the activated carbon regeneration container through the jet inlet, a water pump is arranged on a pipeline communicated with the activated carbon regeneration container, and the ejector is communicated with the ozone generator through the air inlet;
ozone catalytic oxidation tower includes ozone retort, ozone retort lower part is equipped with the water inlet, ozone retort upper portion is equipped with the delivery port, the ejector passes through respectively the efflux export the water inlet with ozone retort intercommunication, ozone retort passes through the delivery port with activated carbon regeneration container intercommunication.
In one embodiment, the activated carbon regeneration system further comprises an activated carbon loading basket, the activated carbon loading basket is used for containing activated carbon and is placed in the activated carbon regeneration container for regeneration treatment, and water seepage holes are distributed in the activated carbon loading basket.
In one embodiment, the ozone reaction tank is internally provided with an ozone oxidation catalyst filling layer and a crushed stone layer, and the crushed stone layer is arranged below the ozone oxidation catalyst filling layer.
In one embodiment, the activated carbon regeneration system further comprises an aeration device, wherein the aeration device is used for performing back washing treatment on the ozone reaction tank, a back washing aeration pipe is arranged in the ozone reaction tank, the back washing aeration pipe is arranged below the gravel layer, the ozone reaction tank is provided with a back washing port, and the back washing aeration pipe is communicated with the aeration device through the back washing port.
An activated carbon regeneration method using the activated carbon regeneration system of any of the above embodiments, the activated carbon regeneration method comprising the steps of:
placing the activated carbon to be treated in the activated carbon regeneration container;
adding regeneration water into the activated carbon regeneration container to submerge the activated carbon to be treated;
starting the ultrasonic treatment device for ultrasonic treatment;
starting the ozone generator to produce ozone;
and starting the water pump to enable the regeneration water to circularly flow between the activated carbon regeneration container and the ozone catalytic oxidation tower so as to perform ozone catalytic oxidation circulation treatment on the regeneration water.
In one embodiment, the ozone generation amount of the ozone generator is decreased according to the number of cycles of the catalytic ozonation cycle treatment, the ozone generation amount of the ozone generator is decreased by 10 to 50 percent in each cycle relative to the previous cycle, and the ozone generator initially generates 0.5 to 1.2kg of ozone per hour according to each ton of the regeneration water.
In one embodiment, the ultrasonic treatment device performs multiple ultrasonic treatments in a batch manner.
In one embodiment, each ultrasonic treatment time is 5-100 min.
In one embodiment, the interval time between two adjacent treatments of the ultrasonic treatment device is the ratio of the effective volume of the activated carbon regeneration container to the water inlet flow rate of the ozone reaction tank, and the effective volume of the activated carbon regeneration container is the maximum volume of water which can be fed after the activated carbon to be treated is filled in the activated carbon regeneration container.
In one embodiment, the activated carbon regeneration method further comprises the steps of:
and detecting the chemical oxygen demand of the regeneration water, and ending the activated carbon regeneration treatment process when the chemical oxygen demand of the regeneration water is not higher than a set value.
Compared with the prior art, the invention has the following beneficial effects:
the activated carbon regeneration system and the method can realize the synchronous degradation of the desorbed substances in the activated carbon regeneration process, and simultaneously, the regeneration water is not added in the treatment process, thereby reducing the generation of waste water.
In addition, the activated carbon regeneration system and the method can realize continuous automatic low-cost activated carbon regeneration treatment.
Drawings
Fig. 1 is a schematic structural view of an activated carbon regeneration system according to an embodiment.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, an embodiment of an activated carbon regeneration system 100 includes an ultrasonic treatment device 110, an activated carbon regeneration vessel 120, an ejector 130, an ozone generator 140, and an ozone catalytic oxidation tower 150. Wherein, the activated carbon regeneration container 120 is used for placing the activated carbon to be treated. The ultrasonic treatment device 110 is used for performing ultrasonic treatment on the activated carbon, and the ultrasonic treatment device 110 includes an ultrasonic transducer for converting electric energy into ultrasonic energy, and the ultrasonic transducer is disposed in the activated carbon regeneration container 120. The ejector 130 is provided with a jet inlet, a jet outlet and an air inlet, the ejector 130 is communicated with the activated carbon regeneration container 120 through the jet inlet, a water pump is arranged on a pipeline for communicating the ejector 130 with the activated carbon regeneration container 120, and the ejector 130 is communicated with the ozone generator 140 through the air inlet. The ozone catalytic oxidation tower 150 comprises an ozone reaction tank, a water inlet is arranged at the lower part of the ozone reaction tank, a water outlet is arranged at the upper part of the ozone reaction tank, the ejector 130 is communicated with the ozone reaction tank through a jet outlet and a water inlet respectively, and the ozone reaction tank is communicated with the activated carbon regeneration container 120 through a water outlet.
In an optional embodiment, the activated carbon regeneration system 100 further includes an activated carbon loading basket for containing activated carbon to be placed in the activated carbon regeneration container 120 for regeneration treatment and discharging of the treated activated carbon, and the activated carbon loading basket is distributed with water seepage holes, and the pore diameter of the water seepage holes is preferably that the activated carbon does not leak out of the water seepage holes.
In an optional embodiment, an ozone oxidation catalyst packing layer and a rubble layer are arranged inside the ozone reaction tank, the rubble layer is arranged below the ozone oxidation catalyst packing layer, and the water distribution pipe system and the back-washing aeration pipe system are arranged below the rubble layer.
In an optional embodiment, the paving thickness of the ozone oxidation catalyst packing layer is 3-4 m. In one embodiment, the packing layer of ozone oxidation catalyst is laid to a thickness of 3.5 m.
In an alternative embodiment, the crushed stone layer is laid with cobblestones.
In an alternative embodiment, the total laying thickness of the gravel layer is 0.1-1 m. In a specific embodiment, the total thickness of the stone layer is 0.5 m.
In an alternative embodiment, the gravel layer is divided into an upper gravel layer, a middle gravel layer and a lower gravel layer from top to bottom according to the volume size of the gravel, the gravel in the upper gravel layer is smaller than the gravel in the middle gravel layer, and the gravel in the middle gravel layer is smaller than the gravel in the lower gravel layer. The volume of the broken stone in the upper stone layer, the middle stone layer and the lower stone layer is preferably 4-34 cm respectively3、34～113cm3And 113-268 cm3. Further, in an optional embodiment, the ratio of the laying thickness of the upper stone layer, the middle stone layer and the lower stone layer is 1-2: 1-2: 1 to 2. In one embodiment, the upper, middle and lower stone layers are laid in a thickness ratio of 1: 1: 1.
in an optional embodiment, the activated carbon regeneration system 100 further comprises an ozone tail gas destructor for converting ozone into oxygen, the ozone reaction tank is provided with a waste gas outlet, and the ozone tail gas destructor is communicated with the ozone reaction tank through the waste gas outlet.
In an optional embodiment, the activated carbon regeneration system 100 further comprises an aeration device 160, wherein the aeration device 160 is used for performing a back washing treatment on the ozone reaction tank, a back washing aeration pipe is arranged in the ozone reaction tank, the back washing aeration pipe is arranged below the crushed stone layer, the ozone reaction tank is provided with a back washing port, and the back washing aeration pipe is communicated with the aeration device 160 through the back washing port.
Further, the present invention also provides an activated carbon regeneration method using the activated carbon regeneration system 100, comprising the steps of:
placing the activated carbon to be treated in an activated carbon regeneration vessel 120;
adding regeneration water to the activated carbon regeneration vessel 120 to submerge the activated carbon to be treated;
starting the ultrasonic treatment device 110 for ultrasonic treatment;
turning on the ozone generator 140 to generate ozone;
the water pump is started to make the regeneration water circularly flow between the activated carbon regeneration container 120 and the ozone catalytic oxidation tower 150, so as to perform the ozone catalytic oxidation circulation treatment on the regeneration water.
In an optional embodiment, the ultrasonic wave generating power of the ultrasonic wave processing device 110 is 0.5-10 kW.
In an alternative embodiment, the ozone generation amount of the ozone generator 140 is decreased progressively according to the number of cycles of the catalytic ozonation cycle treatment, the ozone generation amount of the ozone generator 140 is decreased progressively by 10% to 50% for each cycle relative to the previous cycle, and the ozone generator 140 initially generates 0.5 to 1.2kg of ozone per hour per ton of the regeneration water. In other embodiments, the ozone generation amount of the ozone generator 140 may be constant.
In an alternative embodiment, the ultrasonic treatment device 110 performs multiple ultrasonic treatments intermittently. Further, in an optional embodiment, each ultrasonic treatment time is 5-100 min.
In an alternative embodiment, the interval between two adjacent treatments of the ultrasonic treatment device 110 is the ratio of the effective volume of the activated carbon regeneration container 120 to the water inlet flow rate of the ozone reaction tank, and the effective volume of the activated carbon regeneration container is the maximum volume of water which can be fed after the activated carbon regeneration container 120 is filled with the activated carbon to be treated.
In embodiments where the activated carbon regeneration system 100 includes an aeration device 160, the activated carbon regeneration process further comprises the steps of:
the aeration device 160 is started to perform back flushing treatment on the ozone reaction tank.
In an alternative embodiment, the primary aeration device 160 is turned on every time a period of time has elapsed. In an alternative embodiment, the primary aeration device 160 is turned on every 3 to 7 cycles of the ozone catalytic oxidation cycle. Further, in an alternative embodiment, the time for turning on the aeration device 160 is 10 to 200 min.
In an alternative embodiment, the activated carbon regeneration process further comprises the steps of:
and detecting the chemical oxygen demand of the regeneration water, and ending the activated carbon regeneration treatment process when the chemical oxygen demand of the regeneration water is not higher than a set value.
The present invention will be described in detail with reference to specific examples.
Example 1
The embodiment provides a method for performing regeneration treatment on saturated activated carbon for decoloring printing and dyeing wastewater and synchronously degrading organic pollutants adsorbed in the activated carbon by using an activated carbon regeneration system.
In the activated carbon regeneration system used in this example, the effective volume of the activated carbon regeneration vessel was 1.5m3The water inlet flow velocity of the ozone reaction tank is 1m3/h。
The method comprises the following steps:
(1) adding 1m into an active carbon feeding basket3Putting saturated activated carbon to be treated into an activated carbon regeneration container, and adding sufficient water into the activated carbon regeneration container to submerge the activated carbon to be treated;
(2) starting an ultrasonic treatment device for ultrasonic treatment, starting an ozone generator to generate ozone, starting a water pump to enable regeneration water to circularly flow between an activated carbon regeneration container and an ozone catalytic oxidation tower so as to perform ozone catalytic oxidation circulation treatment on the regeneration water, and starting an aeration device to perform back washing treatment on an ozone reaction tank.
Wherein the set operation mode of the ultrasonic treatment device is to operate for 10min every 1h, and the ultrasonic generation power of the ultrasonic treatment device is 0.5 kW;
the set operation mode of the ozone generator is that every time the ozone generator operates for 1.5 hours, the ozone generation amount is reduced by 20 percent, and the ozone generator initially generates 1kg of ozone per ton of regeneration water per hour;
the set operation mode of the aeration device is to operate once every 6.5h, and the operation time is 10min each time.
(3) And after the activated carbon regeneration system operates for 6.5 hours, detecting the chemical oxygen demand of the regeneration water every 1 hour, and when the chemical oxygen demand of the regeneration water is not higher than 100mg/L, ending the activated carbon regeneration treatment process of the batch, and taking out the activated carbon loading basket.
After the treatment, compared with the new activated carbon, the adsorption capacity of the regenerated activated carbon is recovered to 95% (test method: GB/T7702.6-2008 coal granular activated carbon test method for methylene blue adsorption value).
Example 2
The embodiment provides a method for performing regeneration treatment on saturated activated carbon for decolorization in the food industry and synchronously degrading organic pollutants adsorbed in the activated carbon through an activated carbon regeneration system.
In the activated carbon regeneration system adopted in this embodiment, the effective volume of the activated carbon regeneration container is 9m3The water inlet flow speed of the ozone reaction tank is 2m3/h。
The method comprises the following steps:
(1) adding 9m into an active carbon feeding basket3Putting saturated activated carbon to be treated into an activated carbon regeneration container, and adding sufficient water into the activated carbon regeneration container to submerge the activated carbon to be treated;
(2) starting an ultrasonic treatment device for ultrasonic treatment, starting an ozone generator to generate ozone, starting a water pump to enable regeneration water to circularly flow between an activated carbon regeneration container and an ozone catalytic oxidation tower so as to perform ozone catalytic oxidation circulation treatment on the regeneration water, and starting an aeration device to perform back washing treatment on an ozone reaction tank.
Wherein the set operation mode of the ultrasonic treatment device is to operate for 15min every 4.5h, and the ultrasonic generation power of the ultrasonic treatment device is 10 kW;
the set operation mode of the ozone generator is that every time the ozone generator is operated for 4.5 hours, the ozone generation amount is reduced by 15 percent, and the initial ozone generation amount is 0.8kg per ton of the regeneration water per hour;
the set operation mode of the aeration device is to operate once every 18h, and the operation time is 30min each time.
(3) And after the activated carbon regeneration system operates for 18 hours, detecting the chemical oxygen demand of the regeneration water every 1 hour, and when the chemical oxygen demand of the regeneration water is not higher than 100mg/L, ending the activated carbon regeneration treatment process of the batch, and taking out the activated carbon loading basket.
After the treatment, compared with the new activated carbon, the adsorption capacity of the activated carbon after the regeneration treatment is recovered to 90 percent (test method: GB/T12496.5-1999 test method of wooden activated carbon for carbon tetrachloride adsorption rate (activity)).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An active carbon regeneration system is characterized by comprising an ultrasonic treatment device, an active carbon regeneration container, an ejector, an ozone generator and an ozone catalytic oxidation tower;
the activated carbon regeneration container is used for placing activated carbon to be treated;
the ultrasonic treatment device comprises an ultrasonic transducer which is arranged in the activated carbon regeneration container;
the ejector is provided with a jet inlet, a jet outlet and an air inlet, the ejector is communicated with the activated carbon regeneration container through the jet inlet, a water pump is arranged on a pipeline communicated with the activated carbon regeneration container, and the ejector is communicated with the ozone generator through the air inlet;
ozone catalytic oxidation tower includes ozone retort, ozone retort lower part is equipped with the water inlet, ozone retort upper portion is equipped with the delivery port, the ejector passes through respectively the efflux export the water inlet with ozone retort intercommunication, ozone retort passes through the delivery port with activated carbon regeneration container intercommunication.
2. The activated carbon regeneration system of claim 1, further comprising an activated carbon loading basket for containing activated carbon to be placed in the activated carbon regeneration container for regeneration treatment, wherein the activated carbon loading basket is distributed with water seepage holes.
3. The activated carbon regeneration system according to claim 1 or 2, wherein an ozone oxidation catalyst filler layer and a crushed stone layer are provided inside the ozone reaction tank, and the crushed stone layer is provided below the ozone oxidation catalyst filler layer.
4. The activated carbon regeneration system according to claim 3, further comprising an aeration device for performing a back-washing treatment on the ozone reaction tank, wherein a back-washing aeration pipe is arranged in the ozone reaction tank, the back-washing aeration pipe is arranged below the crushed stone layer, the ozone reaction tank is provided with a back-washing port, and the back-washing aeration pipe is communicated with the aeration device through the back-washing port.
5. An activated carbon regeneration method using the activated carbon regeneration system according to any one of claims 1 to 4, comprising the steps of:
placing the activated carbon to be treated in the activated carbon regeneration container;
adding regeneration water into the activated carbon regeneration container to submerge the activated carbon to be treated;
starting the ultrasonic treatment device for ultrasonic treatment;
starting the ozone generator to produce ozone;
and starting the water pump to enable the regeneration water to circularly flow between the activated carbon regeneration container and the ozone catalytic oxidation tower so as to perform ozone catalytic oxidation circulation treatment on the regeneration water.
6. The activated carbon regeneration method according to claim 5, wherein the amount of ozone generated by the ozone generator decreases as the number of cycles of the ozone catalytic oxidation cycle treatment decreases, the amount of ozone generated by the ozone generator decreases by 10% to 50% per cycle with respect to the previous cycle, and the ozone generator initially generates 0.5 to 1.2kg of ozone per hour per ton of the regeneration water.
7. The activated carbon regeneration method according to claim 5, wherein the ultrasonic treatment device performs the ultrasonic treatment a plurality of times in a batch manner.
8. The activated carbon regeneration method according to claim 7, wherein each ultrasonic treatment time is 5 to 100 min.
9. The activated carbon regeneration method of claim 7, wherein the interval between two adjacent treatments of the ultrasonic treatment device is the ratio of the effective volume of the activated carbon regeneration container to the water inflow rate of the ozone reaction tank, and the effective volume of the activated carbon regeneration container is the maximum volume of water which can be fed after the activated carbon regeneration container is filled with the activated carbon to be treated.
10. The activated carbon regeneration method according to any one of claims 5 to 9, further comprising the steps of:
and detecting the chemical oxygen demand of the regeneration water, and ending the activated carbon regeneration treatment process when the chemical oxygen demand of the regeneration water is not higher than a set value.
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| CN109603790B (en) * | 2019-01-25 | 2022-02-18 | 倍杰特集团股份有限公司 | Regeneration circulating filtration system |
| CN109607981B (en) * | 2019-01-25 | 2022-02-18 | 倍杰特集团股份有限公司 | Multistage biochemical mark filter of carrying |
| CN114471501A (en) * | 2022-03-17 | 2022-05-13 | 哈尔滨工业大学 | Application method of device for intermittently regenerating activated carbon by ozone |
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