CN203715410U - Device for treating pulping wastewater via Fenton catalytic oxidation method - Google Patents
Device for treating pulping wastewater via Fenton catalytic oxidation method Download PDFInfo
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- CN203715410U CN203715410U CN201420047371.0U CN201420047371U CN203715410U CN 203715410 U CN203715410 U CN 203715410U CN 201420047371 U CN201420047371 U CN 201420047371U CN 203715410 U CN203715410 U CN 203715410U
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Abstract
The utility model discloses a device for treating pulping wastewater via a Fenton catalytic oxidation method. The device comprises a water collecting pond, a catalytic oxidation tower, a neutralization pond, a coagulation precipitation tower, a water purification pond and a reagent preparation system, wherein an equalizing regulation tank at the top of the catalytic oxidation tower is connected with the water collecting pond through a pipeline and is connected with a water distributing pipe at the bottom of a fluidized catalytic reaction column of the catalytic oxidation tower through a pipeline; a circulation water discharging tank is connected with the water distributing pipe through a pipeline; the neutralization pond is connected with a water distributing pipe of the coagulation precipitation tower through a pipeline; a water discharging tank is arranged on the outer wall at the upper part of the coagulation precipitation tower; the top of the coagulation precipitation tower is connected with the water discharging tank through an overflow opening. The Fenton catalytic oxidation method comprises the following steps of equalizing regulation treatment, fluidized catalytic oxidation treatment, coagulation precipitation and purification. According to the device disclosed by the utility model, the high treatment effect of the wastewater is realized under the condition of a small adding quantity of hydrogen peroxide and ferrous ions by utilizing the efficient mass transfer efficiency of the device under a fluidization condition, so that the treatment efficiency of the wastewater is improved; the generation quantity of sludge is reduced at the same time.
Description
Technical field
The utility model relates to a kind of pulp and paper effluent treatment device, is specifically related to the device that a kind of Fenton catalytic oxidation is processed pulp-making waste-water.
Background technology
Pulp and paper industry is one of important source of waste water and pollutant emission.Current, generally take the technique of one-level materialization processing and two stage biological treatment combination to process paper-making effluent, effectively reduce the pollution load of waste water.But, the organism that contains certain density difficult for biological degradation in pulp-making waste-water, the effect that has suppressed biological treatment, cause waste water can not reach national emission standard after two stage biological is processed, still the organism that contains higher concentration, thereby must carry out further advanced treatment, to alleviate the impact on receiving water body and ecotope.
Fenton catalytic oxidation is that employing ferrous ion is catalyzer, in reaction system, ferrous ion catalyzing hydrogen peroxide decomposes generation hydroxyl radical free radical OH, again by OH be oxidized, organic pollutant in mineralising waste water, thereby reach the object of the pollutent in remarkable removal waste water.Fenton catalytic oxidation comprises in fact two continuous steps: under sour environment, ferrous ion catalyzing hydrogen peroxide decomposes generation OH, by the organism in OH oxidative degradation, mineralising, removal waste water; Then, regulate the pH value of reaction system to alkalescence, iron ion generates molysite deposition flco under alkaline condition, by the mode of absorption, coagulation, precipitation, removes organic pollutant, suspended substance and other pollutents in waste water.Fenton catalytic oxidation is in current engineering, to apply more high-level oxidation technology, have the advantages that speed of response is fast, reaction conditions is gentle and treatment effect is good, become degraded and removed one of major technique of the refractory organic in waste water, there is stable good result.But traditional Fenton catalyzed oxidation technology exists the problem that chemicals usage is large, processing cost is high, and in treating processes, has produced a large amount of mud.
Utility model content
The purpose of this utility model is to overcome the deficiency that existing common Fenton oxidation technology exists, and a kind of device that reduces chemicals usage, minimizing chemical sludge output, improves the Fenton catalytic oxidation processing pulp-making waste-water of waste water treatment efficiency is provided.
The purpose of this utility model is achieved through the following technical solutions:
Fenton catalytic oxidation is processed a device for pulp-making waste-water, comprises water collecting basin, catalyzed oxidation tower, neutralization tank, coagulating sedimentation tower, clean water basin and medicament preparation system; The balanced regulating tank of catalyzed oxidation top of tower is connected with water collecting basin by pipeline; On the connecting tube of water collecting basin and balanced regulating tank, be provided with the first water pump, the first line mixer, second pipe mixing tank and the first flow meter connecting successively; The first line mixer is connected with the outlet of the acid solution storagetank of medicament preparation system by pipeline; On the connecting tube of the acid solution storagetank outlet of the first line mixer and medicament preparation system, be provided with the second volume pump; Second pipe mixing tank is connected with the outlet of the catalyzer storagetank of medicament preparation system by pipeline; On the connecting tube of the catalyzer storagetank outlet of second pipe mixing tank and medicament preparation system, be provided with the first volume pump;
Described balanced regulating tank is connected with the water distributor of the fluidization catalytic reaction column bottom of catalyzed oxidation tower by pipeline; On the connecting tube of balanced regulating tank and water distributor, be provided with the second under meter, the second water pump and the 3rd line mixer being connected successively; The 3rd line mixer is connected with the outlet of the hydrogen peroxide storagetank of medicament preparation system by pipeline; On the connecting tube of the hydrogen peroxide storagetank outlet of the 3rd line mixer and medicament preparation system, be provided with the 3rd volume pump;
The external wall of upper portion of described fluidization catalytic reaction post is provided with and recycles tank, recycles tank and is connected with water distributor by pipeline; Recycle on the connecting tube of tank and water distributor and be provided with the 3rd under meter and the water circulating pump being connected successively; Recycle tank and also by outlet conduit, be connected with the water-in of neutralization tank, on outlet conduit, be also provided with the 4th under meter;
Described neutralization tank is connected with the water distributor of coagulating sedimentation tower by pipeline, on the connecting tube of neutralization tank and the water distributor of coagulating sedimentation tower, is provided with the 3rd water pump and the 4th line mixer being connected successively; In neutralization tank, be provided with whipping appts, neutralization tank is connected with the outlet of the alkali lye storagetank of medicament preparation system by pipeline, and on connecting tube, is provided with the 4th volume pump; The 4th line mixer is connected with the outlet of the flocculation agent storagetank of medicament preparation system by pipeline; On the connecting tube of the flocculation agent storagetank outlet of the 4th line mixer and medicament preparation system, be provided with the 5th volume pump;
In described coagulating sedimentation tower external wall of upper portion, be provided with effluent trough, coagulating sedimentation top of tower is connected with effluent trough by overflow port; Effluent trough is connected with clean water basin by rising pipe, and effluent trough is also connected with clean water basin by the 3rd upflow tube;
In the fluidization catalytic reaction post of described catalyzed oxidation tower, be also provided with fluidic plate and particle input port;
Described balanced regulating tank is connected with water collecting basin by the first upflow tube.
For further realizing the purpose of this utility model, preferably, in described balanced regulating tank, be provided with several piece dividing plate separated from one another.Described fluidic plate is the porous fanning strip that is provided with taper hole.The described tank that recycles is connected with water collecting basin by the second upflow tube.
Compared with prior art, tool has the following advantages the utility model:
1, the utility model utilizes fluidized catalytic oxidation technology to replace traditional Fenton oxidizing process, utilize efficient mass-transfer efficiency under fluidization condition, realized the higher position reason effect of waste water under lower hydrogen peroxide and ferrous ion dosage condition, improve the efficiency of wastewater treatment, reduced the growing amount of mud simultaneously.Waste water passes through successively the processing of strong fluidization hybrid reaction district, fluidized catalytic oxidation reaction zone and solid-liquid displacement zone in catalytic oxidation unit, make waste water and Fenton reagent under fluidization condition fully, evenly mix, carry out fluidised catalytic oxidation, effectively improve the speed of mass-transfer efficiency and chemical reaction, improved the effect of Organic Pollutants in Wastewater oxidative degradation; Can reduce Fenton using amount of reagent, reduce the output of mud in later stage coagulation process simultaneously.
2, the waste water after the utility model fluidized catalytic oxidizing reaction under fluidization condition and alkali lye, flocculation agent carry out fully, evenly mix, reaction, has effectively improved the efficiency of mass transfer, has strengthened the effect of coagulating waste water precipitation; On the other hand, waste water has been realized the object of coagulation, precipitation, purification in coagulating sedimentation tower simultaneously, has effectively improved the efficiency of wastewater treatment, has shortened the flow process of wastewater treatment.
3, the utility model hydrogen peroxide joins in reaction system progressively, continuously, effectively maintained stable, higher concentration of hydrogen peroxide in fluidized catalytic oxidizing tower, guarantee the generation of hydroxyl radical free radical continuous and effective, guarantee higher catalytic oxidation speed, can effectively reduce the decomposition of hydrogen peroxide, reduce the demand of hydrogen peroxide simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that this Fenton catalytic oxidation is processed the method for pulp-making waste-water.
Embodiment
Below in conjunction with drawings and Examples, the utility model will be further described, but the claimed scope of the utility model is not limited to the scope that embodiment explains.
As shown in Figure 1, a kind of Fenton catalytic oxidation is processed the device of pulp-making waste-water, comprises water collecting basin 1, catalyzed oxidation tower 6, neutralization tank 19, coagulating sedimentation tower 23, clean water basin 25 and medicament preparation system 26; Medicament preparation system is prepared and/or has been stored acid, catalyzer, alkali, flocculant solution and hydrogen peroxide, and by volume pump, is joined in waste water and gone respectively.
The balanced regulating tank 7 at catalyzed oxidation tower 6 tops is connected with water collecting basin 1 by pipeline; On the connecting tube of water collecting basin 1 and balanced regulating tank 7, be provided with the first water pump 2, the first line mixer 3, second pipe mixing tank 4 and the first flow meter 5 connecting successively; The first line mixer 3 is connected with the outlet of the acid solution storagetank of medicament preparation system 26 by pipeline; On the connecting tube of the acid solution storagetank outlet of the first line mixer 3 and medicament preparation system 26, be provided with the second volume pump 28; Second pipe mixing tank 4 is connected with the outlet of the catalyzer storagetank of medicament preparation system 26 by pipeline; On the connecting tube of the catalyzer storagetank outlet of second pipe mixing tank 4 and medicament preparation system 26, be provided with the first volume pump 27;
Balanced regulating tank 7 is connected with the water distributor 11 of fluidization catalytic reaction post 12 bottoms of catalyzed oxidation tower 6 by pipeline; On the connecting tube of balanced regulating tank 7 and water distributor 11, be provided with the second under meter 9, the second water pump 8 and the 3rd line mixer 10 being connected successively; The 3rd line mixer 10 is connected with the outlet of the hydrogen peroxide storagetank of medicament preparation system 26 by pipeline; On the connecting tube of the hydrogen peroxide storagetank outlet of the 3rd line mixer 10 and medicament preparation system 26, be provided with the 3rd volume pump 29;
The external wall of upper portion of fluidization catalytic reaction post 12 is provided with and recycles tank 17, recycles tank 17 and is connected with water distributor 11 by pipeline; Recycle on the connecting tube of tank 17 and water distributor 11 and be provided with the 3rd under meter 16 and the water circulating pump 15 being connected successively; Recycle tank 17 and also by outlet conduit 35, be connected with the water-in of neutralization tank 19, on outlet conduit 35, be also provided with the 4th under meter 18;
Neutralization tank 19 is connected with the water distributor of coagulating sedimentation tower 23 by pipeline, on the connecting tube of neutralization tank 19 and the water distributor of coagulating sedimentation tower 23, is provided with the 3rd water pump 21 and the 4th line mixer 22 being connected successively; In neutralization tank 19, be provided with whipping appts 20, neutralization tank 19 is connected with the outlet of the alkali lye storagetank of medicament preparation system 26 by pipeline, and on connecting tube, is provided with the 4th volume pump 30; The 4th line mixer 22 is connected with the outlet of the flocculation agent storagetank of medicament preparation system 26 by pipeline; On the connecting tube of the flocculation agent storagetank outlet of the 4th line mixer 22 and medicament preparation system 26, be provided with the 5th volume pump 31;
In coagulating sedimentation tower 23 external wall of upper portion, be provided with effluent trough 24, coagulating sedimentation tower 23 tops are connected with effluent trough 24 by overflow port; Effluent trough 24 is connected with clean water basin 25 by rising pipe 36, and effluent trough 24 is also connected with clean water basin 25 by the 3rd upflow tube 37;
In balanced regulating tank 7, be provided with several piece dividing plate separated from one another;
In the fluidization catalytic reaction post 12 of catalyzed oxidation tower 6, be also provided with fluidic plate 13 and particle input port 32, by particle input port 32, to fluidization catalytic reaction post 12, add solid granule 14; Fluidic plate 13 is for being provided with the porous fanning strip of taper hole;
Coagulating sedimentation tower 23 is provided with fluidization reaction zone, flco reaction of propagation district, flco separation and precipitation area, mud enrichment region and the clarification pool of circulation successively.
Balanced regulating tank 7 is connected with water collecting basin 1 by the first upflow tube 33, recycles tank 17 and is connected with water collecting basin 1 by the second upflow tube 34.
Embodiment 1
The present embodiment process southern weedtree slurry D0/C ?the waste water of (EO) PD1 bleaching effluent after acidication and Wastewater Treated by Activated Sludge Process, the COD of waste water
crfor 350mg/L, BOD
5for 55mg/L, colourity is 490C.U..
The Fenton catalytic oxidation of application said apparatus is processed the method for pulp-making waste-water, comprises the following steps and processing condition:
1) balanced adjusting processed: the waste water in water collecting basin 1 is transported to the balanced regulating tank 7 at catalyzed oxidation tower 6 tops by the first water pump 2, adds respectively H simultaneously by the first line mixer 3 and second pipe mixing tank 4
2sO
4and FeSO
47H
2o.In balanced regulating tank 7, be provided with several piece dividing plate separated from one another, waste water successively by each dividing plate, makes waste water, H with pulling flow type
2sO
4and FeSO
47H
2o obtains fully, evenly mixes in by the first line mixer 3, second pipe mixing tank 4 and balanced regulating tank 7; Waste water is 10～15 minutes in the residence time of balanced regulating tank 7; By pending wastewater volume, FeSO
47H
2the add-on of O is 875mg/L.
2) fluidized catalytic oxide treatment: adopt the second water pump 8 to deliver into the water distributor 11 of fluidization catalytic reaction post 12 bottoms by pipeline through the balanced waste water of processing that regulates, by the 3rd line mixer 10, add hydrogen peroxide simultaneously, in wastewater volume, the add-on of superoxol in waste water controlled as 1225mg/L; By particle input port 32, to fluidization catalytic reaction post 12, drop into the small-particle quartz sand 14 that particle diameter is 0.5～1.5mm; The waste water flowing out from water distributor 11 upwards flows in the bottom of fluidization catalytic reaction post 12 with the flow velocity of 45～65m/h, makes small-particle quartz sand 14 be fluidized state, carries out fluidized catalytic oxidizing reaction; And the fluidic plate 13 that fluidization catalytic reaction post 12 bottoms arrange makes waste water present the flow states such as turbulent flow, mixed flow, whirlpool, effectively strengthened the fluidization degree of fluidization catalytic reaction post 12 bottoms, be conducive to organism, hydrogen peroxide, H in waste water
2sO
4and FeSO
47H
2the rapid mixing of O, reaction, improved the speed of catalytic oxidation.
Waste water arrives the top of fluidization catalytic reaction post 12 after fluidized catalytic oxide treatment, increase along with flow cross-sectional area, on waste water, Flow Velocity declines, and the movement velocity of quartz sand particle 14 constantly declines, and finally waste water is separated with quartz sand is overflowed to and recycled tank 17 by effluent weir;
Part (the 1/2 ?2/3 quality) water recycling in tank 17 delivers into the water distributor 11 of fluidization catalytic reaction post 12 bottoms through pipeline by water circulating pump 15, mix with the waste water from balanced regulating tank 7, to maintain the upper Flow Velocity of waste water in fluidization reaction column 12, make the abundant fluidization of small-particle quartz sand; Recycle the effluent weir overflow by top of another part water (1/3 ?1/2 quality) in tank 17 and enter neutralization tank 19;
Waste water passes through successively the processing of strong fluidization hybrid reaction district, fluidized catalytic oxidation reaction zone and solid-liquid displacement zone in the fluidization catalytic reaction post 12 of catalyzed oxidation tower 6.
3) coagulating sedimentation and purification: through the waste water of catalytic oxidation treatment, by recycling tank 17, enter neutralization tank 19, the four volume pumps 30 add sodium hydroxide solution in neutralization tank 19.Then, by the 3rd water pump 21, through pipeline, be transported to the water distributor of coagulating sedimentation tower 23, enter the fluidization reaction zone of coagulating sedimentation tower 23, by the 4th line mixer 22, in waste water, add flocculation agent polyacrylamide, in wastewater volume, the add-on of polyacrylamide is 1.5mg/L; In fluidization reaction zone, micro-floccule starts to form, and maintains current lift velocity for (25～45) m/h, makes micro-floccule in fluidized state, makes waste water fully mix, contact, react with flocculation agent;
From fluidization reaction zone waste water out, enter flco reaction of propagation district, the flow velocity of waste water declines, and fluidization weakens gradually, and micro-floccule is phase mutual coagulation under flocculation agent effect, forms larger flco and starts to sink; Then, waste water enters flco separation and precipitation area; In flco separation and precipitation area, the flow velocity that waste water rises further declines, flco sinks down into mud enrichment region gradually, at reactor bottom, form precipitation concentrated gradually, and waste water flow to the clarification pool at coagulating sedimentation tower 23 tops on slowly, by overflow weir overflow, enter effluent trough 24, then be transported to clean water basin 25 by rising pipe 36, complete the Fenton catalytic oxidation treatment process of waste water.
After testing, after processing, the COD of waste water
crfor 75mg/L, colourity is 80C.U..And take conventional Fenton treatment process, the COD of processed waste water
cr120 ?between 150mg/L, colourity be 120 ?170C.U., and processing cost is higher.
Embodiment 2
The present embodiment except following with embodiment 1: the device that a kind of Fenton catalytic oxidation is processed pulp-making waste-water for the treatment of southern weedtree slurry D0/C ?the waste water of (EO) PD1 bleaching effluent after acidication and Wastewater Treated by Activated Sludge Process, the COD of waste water
crfor 310mg/L, colourity is 530C.U.; In the present embodiment, in wastewater volume, FeSO
47H
2the add-on of O is 465mg/L, and hydrogen peroxide add-on is 930mg/L, and the add-on of polyacrylamide is 1.8mg/L.After treatment, the COD of waste water
crfor 95mg/L, colourity is 100C.U..And take conventional Fenton treatment process, the COD of processed waste water
cr120 ?between 150mg/L, colourity be 120 ?170C.U., and processing cost is higher.
Embodiment 3
The present embodiment except following with embodiment 1: the device that a kind of Fenton catalytic oxidation is processed pulp-making waste-water is the waste water after UASB and SBR process for the treatment of certain tobacco sheet enterprise waste water generated during paper-making process reconstituted-tobacco production, the COD of waste water
crfor 550mg/L, colourity is 1900C.U.; In the present embodiment, in wastewater volume, FeSO
47H
2the add-on of O is 1100mg/L, and hydrogen peroxide add-on is 825mg/L, and the add-on of polyacrylamide is 2.0mg/L.After treatment, the COD of waste water
crfor 180mg/L, colourity is 280C.U..And take conventional Fenton treatment process, the COD of processed waste water
cr230 ?between 260mg/L, colourity be 400 ?480C.U., and processing cost is higher.
Claims (4)
1. Fenton catalytic oxidation is processed a device for pulp-making waste-water, it is characterized in that, comprises water collecting basin, catalyzed oxidation tower, neutralization tank, coagulating sedimentation tower, clean water basin and medicament preparation system; The balanced regulating tank of catalyzed oxidation top of tower is connected with water collecting basin by pipeline; On the connecting tube of water collecting basin and balanced regulating tank, be provided with the first water pump, the first line mixer, second pipe mixing tank and the first flow meter connecting successively; The first line mixer is connected with the outlet of the acid solution storagetank of medicament preparation system by pipeline; On the connecting tube of the acid solution storagetank outlet of the first line mixer and medicament preparation system, be provided with the second volume pump; Second pipe mixing tank is connected with the outlet of the catalyzer storagetank of medicament preparation system by pipeline; On the connecting tube of the catalyzer storagetank outlet of second pipe mixing tank and medicament preparation system, be provided with the first volume pump;
Described balanced regulating tank is connected with the water distributor of the fluidization catalytic reaction column bottom of catalyzed oxidation tower by pipeline; On the connecting tube of balanced regulating tank and water distributor, be provided with the second under meter, the second water pump and the 3rd line mixer being connected successively; The 3rd line mixer is connected with the outlet of the hydrogen peroxide storagetank of medicament preparation system by pipeline; On the connecting tube of the hydrogen peroxide storagetank outlet of the 3rd line mixer and medicament preparation system, be provided with the 3rd volume pump;
The external wall of upper portion of described fluidization catalytic reaction post is provided with and recycles tank, recycles tank and is connected with water distributor by pipeline; Recycle on the connecting tube of tank and water distributor and be provided with the 3rd under meter and the water circulating pump being connected successively; Recycle tank and also by outlet conduit, be connected with the water-in of neutralization tank, on outlet conduit, be also provided with the 4th under meter;
Described neutralization tank is connected with the water distributor of coagulating sedimentation tower by pipeline, on the connecting tube of neutralization tank and the water distributor of coagulating sedimentation tower, is provided with the 3rd water pump and the 4th line mixer being connected successively; In neutralization tank, be provided with whipping appts, neutralization tank is connected with the outlet of the alkali lye storagetank of medicament preparation system by pipeline, and on connecting tube, is provided with the 4th volume pump; The 4th line mixer is connected with the outlet of the flocculation agent storagetank of medicament preparation system by pipeline; On the connecting tube of the flocculation agent storagetank outlet of the 4th line mixer and medicament preparation system, be provided with the 5th volume pump;
In described coagulating sedimentation tower external wall of upper portion, be provided with effluent trough, coagulating sedimentation top of tower is connected with effluent trough by overflow port; Effluent trough is connected with clean water basin by rising pipe, and effluent trough is also connected with clean water basin by the 3rd upflow tube;
In the fluidization catalytic reaction post of described catalyzed oxidation tower, be also provided with fluidic plate and particle input port;
Described balanced regulating tank is connected with water collecting basin by the first upflow tube.
2. Fenton catalytic oxidation according to claim 1 is processed the device of pulp-making waste-water, it is characterized in that, is provided with several piece dividing plate separated from one another in described balanced regulating tank.
3. Fenton catalytic oxidation according to claim 1 is processed the device of pulp-making waste-water, it is characterized in that, described fluidic plate is the porous fanning strip that is provided with taper hole.
4. Fenton catalytic oxidation according to claim 1 is processed the device of pulp-making waste-water, it is characterized in that, described in recycle tank and be connected with water collecting basin by the second upflow tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420047371.0U CN203715410U (en) | 2014-01-24 | 2014-01-24 | Device for treating pulping wastewater via Fenton catalytic oxidation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420047371.0U CN203715410U (en) | 2014-01-24 | 2014-01-24 | Device for treating pulping wastewater via Fenton catalytic oxidation method |
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| Publication Number | Publication Date |
|---|---|
| CN203715410U true CN203715410U (en) | 2014-07-16 |
Family
ID=51154578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420047371.0U Withdrawn - After Issue CN203715410U (en) | 2014-01-24 | 2014-01-24 | Device for treating pulping wastewater via Fenton catalytic oxidation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203715410U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103771625A (en) * | 2014-01-24 | 2014-05-07 | 华南理工大学 | Device and method for treating pulping wastewater by Fenton catalytic oxidation method |
| CN113371886A (en) * | 2021-07-12 | 2021-09-10 | 南京环保产业创新中心有限公司 | Multi-reaction-chamber Fenton fluidized bed reactor and wastewater treatment method thereof |
-
2014
- 2014-01-24 CN CN201420047371.0U patent/CN203715410U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103771625A (en) * | 2014-01-24 | 2014-05-07 | 华南理工大学 | Device and method for treating pulping wastewater by Fenton catalytic oxidation method |
| CN103771625B (en) * | 2014-01-24 | 2014-12-31 | 华南理工大学 | Device and method for treating pulping wastewater by Fenton catalytic oxidation method |
| CN113371886A (en) * | 2021-07-12 | 2021-09-10 | 南京环保产业创新中心有限公司 | Multi-reaction-chamber Fenton fluidized bed reactor and wastewater treatment method thereof |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140716 Effective date of abandoning: 20141231 |
|
| RGAV | Abandon patent right to avoid regrant |