CN103435142B - General-purpose internal circulation fenton reactor treating difficult-to-degrade organic wastewater - Google Patents
General-purpose internal circulation fenton reactor treating difficult-to-degrade organic wastewater Download PDFInfo
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- CN103435142B CN103435142B CN201310328341.7A CN201310328341A CN103435142B CN 103435142 B CN103435142 B CN 103435142B CN 201310328341 A CN201310328341 A CN 201310328341A CN 103435142 B CN103435142 B CN 103435142B
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Abstract
The invention discloses a general-purpose internal circulation fenton reactor treating difficult-to-degrade organic wastewater. The reactor structurally comprises a water inlet, a mixing area, a baffle, a first sleeve, a second sleeve, a third sleeve, ultraviolet lamps, an overflow groove, a water outlet, an external reactor wall, a first reaction area, a second reaction area, an aerator and an air inlet, wherein the reactor is a covered barrel; a cylinder is arranged at the upper part of the reactor; a circular table is arranged at the lower part of the reactor; the water inlet and the aerator are formed and arranged at the bottom of the reactor; the three sleeves with the opened lower parts are arranged in the middle of the reactor; the reactor is divided into the mixing area, the first reaction area and the second reaction area; the overflow groove and the water outlet are formed at the upper part of the reactor; the reversely-arranged horn-shaped baffle is arranged at the bottom of the reactor; and the ultraviolet lamps are distributed in the reactor. The reactor has a better treatment effect on the difficult-to-degrade organic wastewater; a heterogeneous catalyst is circulated among the reaction areas of the reactor, and can be recycled; and a mineralization degree of an organic pollutant is high.
Description
Technical field
The present invention relates to a kind of universal internal recycle Fenton (Fenton) reactor of processing organic wastewater with difficult degradation thereby, belong to sewage treatment area.
Background technology
In various types of waste water, the waste water that contains a large amount of Persistent organic pollutants is the main arch-criminal that water pollutes.The organic pollutant that these difficulties are degraded by microorganisms is mainly derived from the industrial trades such as petrochemical complex, metallurgy, printing and dyeing, pharmacy, papermaking, and agricultural chemicals and the domestic waste of rural area use.The feature of these organic wastewater with difficult degradation thereby is that concentration is higher, complicated component, and strong toxicity, chemical oxygen demand is high, have " three cause " effect or toxicity, once to environmental emission, will cause severe environmental pollution, and threaten the people's health.
The treatment process of organic wastewater with difficult degradation thereby mainly contains three major types at present, respectively: biological process, Physical and chemical oxidization method.Along with day by day strengthening and National Emission Standard increasingly strict of common people's environmental protection consciousness; the biologic treating technique that most enterprises adopts before can not reach up-to-date industry wastewater discharge standard; current widely accepted technique is the treatment process that adopts biochemical treatment+advanced treatment to combine; biochemical treatment can removed a large amount of pollutents under condition cheaply; advanced treatment can further be removed the hardly degraded organic substance in waste water, ensures to reach emission standard.The more advanced treatment technology of research is membrane separation technique and high-level oxidation technology at present.Although membrane separation technique treatment effect is pretty good, because concentrated solution is difficult, film easily pollutes and invest the shortcomings such as running cost height, application is very limited.Advanced oxidation processes utilizes hydroxyl radical free radical (OH) that the toxic organic compound in waste water is decomposed into the small-molecule substance of nontoxic or low toxicity and then improves its biodegradability, even thoroughly being converted into the inorganics such as carbonic acid gas and water, is a kind of method of thorough processing organic pollutants.
Fenton (Fenton) technology is more valued a kind of high-level oxidation technology (AOPs): Fe in recent years
2+catalysis H
2o
2generate the high OH of oxidation capacity, the further oxidation of organic compounds of OH.Fenton system (Photo-Fenton) has the advantage of high-level oxidation technology and photocatalysis oxidation technique concurrently, and degradation efficiency is high, secondary pollution is low.In refractory wastewater field, Fenton system has become one of technology of generally acknowledged tool application prospect gradually.Homogeneous phase Fenton system and heterogeneous Fenton system respectively have relative merits, homogeneous phase Fenton system exists pH value narrow application range, iron ion easily to run off and cause secondary pollution problems, although Multi-phase light helps Fenton system, within the scope of wider pH value, organic wastewater with difficult degradation thereby is had to good treatment effect, processing efficiency helps Fenton system lower than homogeneous phase light.
At present rarely Fenton method for the industrial treatment of actual waste water, except cost will further be controlled, what urgent need will solve is exactly design simple in structure, efficiency is high, be suitable for industrialized photoreactor.Photochemical catalysis-the membrane separation reactor having worked out and three phase inner circulation fluidized bed photocatalytic reactor all, for the design of multiphase photocatalysis reactor provides good thinking, are really applied to wastewater treatment industry and have got long long way to go.
Summary of the invention
The object of the invention is provides a kind of universal internal recycle Fenton reactor that utilizes Fenton system to process organic wastewater with difficult degradation thereby for increasingly serious water pollution situation and the deficiencies in the prior art.
Structure of the present invention comprises: water-in, mixing zone, baffle plate, the first heavy sleeve, the second heavy sleeve, triple sleeves, ultraviolet lamp, overflow groove, water outlet, reactor outer wall, the first reaction zone, second reaction zone, aeration head, gas inlet;
Described reactor is that top is that to be round platform add a cover cylindrical shell for cylinder, bottom, water-in and aeration head are established in bottom, centre arranges triple sleeves of lower openings, reactor is divided into mixing zone, the first reaction zone and second reaction zone, overflow groove and water outlet are established in top, bottom is provided with is inverted trumpet-shaped baffle plate, is furnished with ultraviolet lamp in reactor;
Ultraviolet lamp bundle is arranged in the first reaction zone of described reactor central authorities, and the second reaction zone of reactor periphery is evenly arranged several ultraviolet lamps; Triple sleeves of described system lower openings, its structure can be that upper cartridge is cylindrical, and centre is horn-like, and bottom is the cylindrical drum with large breach;
Light source multiple light courcess form of light source that makes a circle outward in the middle of the photosystem of described reactor is set to;
Described reactor is not only applicable to multiphase Fenton system but also be applicable to homogeneous phase Fenton system, not only be applicable to common Fenton system but also be applicable to Fenton system, according to the character of waste water and Pollutant levels, can be by adding multi-form catalyzer and switch ultraviolet lamp to reach different treatment effect cost-saving, for homogeneous phase Fenton system, add ferrous ion as catalyzer; For multiphase Fenton system, add granules of catalyst as catalyzer; For common homogeneous phase Fenton system, close ultraviolet lamp; Help Fenton system for light, open ultraviolet lamp;
Reactor bottom is provided with aeration head and water-in, due to the effect of ascending current and floating bubble, in mixing zone, between the first reaction zone and second reaction zone, there is density difference, order about between pending solution and Fenton reagent San Ge district and circulate, unnecessary gas overflows from the ventilating pit of reactor head, water inlet, air, catalyzer and hydrogen peroxide mix in mixing zone, upwards enter the first reaction zone, there is Fenton's reaction, because the first heavy sleeve upper edge is higher than overflow groove upper edge, pending solution forms secondary downwards and refluxes between triple sleeves, granules of catalyst herein controlled classification refluxes, after reaction solution flows down between triple sleeves, the pending solution of part enters periphery, waste water continues to be degraded in second reaction zone, if use granules of catalyst, granules of catalyst can separate to realize solid-liquid by stable settlement, supernatant liquor after treatment is discharged through overflow groove and water outlet, part waste water and catalyzer are back to the mixing zone of bottom through baffle effect, with backward upper the flowing of water inlet air mixed.
Beneficial effect of the present invention is: reactor of the present invention is not only applicable to multiphase Fenton system but also be applicable to homogeneous phase Fenton system, is not only applicable to common Fenton system but also is applicable to Fenton system.Reactor top is cylinder, and bottom is round platform, and top is that cylinder shape makes reactor have higher light utilization efficiency and good symmetry, and bottom is that round platform is conducive to pending waste water and granules of catalyst refluxes.Built-in triple sleeve is by regulating height and interval width, both can facilitate granules of catalyst point granularity to reflux, can design sleeve dimensions to control rational reflux ratio by condition of water quality again, extend hydraulic detention time, mixing zone and the first reaction zone and peripheral second reaction zone in the middle of triple sleeves are separated into reactor.In order to improve the contact area of reactor medium ultraviolet light and solution, light source multiple light courcess form of light source that makes a circle outward in the middle of the photosystem of reactor is set to, so the reactor for treatment water yield increases, light intensity distributes more even in reactor, is applicable to industrial practical application.Within the scope of wider pH value, this reactor has good treatment effect to organic wastewater with difficult degradation thereby, and heterogeneous catalyst circulates between the each reaction zone of reactor, can reuse, and organic pollutant salinity is high.
Brief description of the drawings
Fig. 1 is that structure master of the present invention looks schematic diagram;
Fig. 2 is structure schematic top plan view of the present invention;
In figure, 1-water-in; 2-mixing zone; 3-baffle plate; The heavy sleeve of 4-first; The heavy sleeve of 5-second; The triple sleeves of 6-; 7-ultraviolet lamp; 8-overflow groove; 9-water outlet; 10-reactor outer wall; 11-the first reaction zone; 12-second reaction zone; 13-aeration head; 14-gas inlet.
Embodiment
Accompanying drawings is as follows:
The structure of the universal internal recycle Fenton reactor of processing organic wastewater with difficult degradation thereby of the present invention comprises: water-in, mixing zone, baffle plate, the first heavy sleeve, the second heavy sleeve, triple sleeves, ultraviolet lamp, overflow groove, water outlet, reactor outer wall, the first reaction zone, second reaction zone, aeration head, gas inlet;
Described reactor top is cylinder, and bottom is round platform, and top is that cylinder shape makes reactor have higher light utilization efficiency and good symmetry, and bottom is that round platform is conducive to pending water sample backflow.In order to improve the contact area of reactor light and solution, light source multiple light courcess form of light source that makes a circle outward in the middle of the photosystem of reactor is set to, so the reactor for treatment water yield increases, light intensity distributes more even in reactor, is applicable to industrial practical application.Utilize triple sleeves to be separated into middle mixing zone and the first reaction zone and peripheral second reaction zone, middle and many ultraviolet lamps of placement that make a circle outward.
Reactor bottom is provided with aeration head and water-in, due to the effect of ascending current and floating bubble, between mixing zone, the first reaction zone and second reaction zone, there is density difference, order about between pending solution and Fenton reagent San Ge district and circulate, unnecessary gas overflows from the ventilating pit of reactor head.Water inlet, air, catalyzer and hydrogen peroxide mix in mixing zone, upwards enter the first reaction zone, and Fenton's reaction occurs.Because the first heavy sleeve upper edge is higher than overflow groove upper edge, pending solution forms secondary backflow (granules of catalyst herein controlled classification refluxes) downwards between triple sleeves.After reaction solution flows down between triple sleeves, the pending solution of part enters periphery, waste water continues to be degraded in second reaction zone (if use granules of catalyst, granules of catalyst can stable settlement separates to realize solid-liquid), supernatant liquor after treatment is discharged through overflow groove and water outlet, part waste water and catalyzer are back to the mixing zone of bottom through baffle effect, with backward upper the flowing of water inlet air mixed.
Can select hydrogen peroxide consumption, aeration rate, catalyst type according to wastewater property, catalyst levels, ultraviolet lamp power and hydraulic detention time, process the organic waste water of the various compositions of various concentration to utilize this reactor economical and efficient.
For high-concentration waste water, for cost consideration, this reactor is relatively suitable as the follow-up advanced treatment process of biochemical processing, and this reactor can effectively be processed the hardly degraded organic substance in bio-chemical effluent, both emission standard can be ensured to reach, and economy can be ensured again.
Through test, when this reactor for treatment waste water from dyestuff, degradation rate and mineralization rate are all greater than 93%, the percolate after biochemical treatment is carried out to advanced treatment and can reach up-to-date percolate emission standard.
Claims (2)
1. a universal internal recycle Fenton reactor of processing organic wastewater with difficult degradation thereby, is characterized in that: described structure of reactor comprises: water-in, mixing zone, baffle plate, the first heavy sleeve, the second heavy sleeve, triple sleeves, ultraviolet lamp, overflow groove, water outlet, reactor outer wall, the first reaction zone, second reaction zone, aeration head, gas inlet;
Described reactor is that top is that to be round platform add a cover cylindrical shell for cylinder, bottom, water-in and aeration head are established in bottom, centre arranges triple sleeves of lower openings, reactor is divided into mixing zone, the first reaction zone and second reaction zone, overflow groove and water outlet are established in top, bottom is provided with is inverted trumpet-shaped baffle plate, is furnished with ultraviolet lamp in reactor;
Ultraviolet lamp bundle is arranged in the first reaction zone of described reactor central authorities, and the second reaction zone of reactor periphery is evenly arranged several ultraviolet lamps; Light source multiple light courcess form of light source that makes a circle outward in the middle of the photosystem of described reactor is set to;
Described reactor is not only applicable to multiphase Fenton system but also be applicable to homogeneous phase Fenton system, not only be applicable to common Fenton system but also be applicable to Fenton system, according to the character of waste water and Pollutant levels, by adding multi-form catalyzer and switch ultraviolet lamp to reach different treatment effects, for homogeneous phase Fenton system, add ferrous ion as catalyzer; For multiphase Fenton system, add granules of catalyst as catalyzer; For common homogeneous phase Fenton system, close ultraviolet lamp; Help Fenton system for light, open ultraviolet lamp;
Reactor bottom is provided with aeration head and water-in, due to the effect of ascending current and floating bubble, in mixing zone, between the first reaction zone and second reaction zone, there is density difference, order about between pending solution and Fenton reagent San Ge district and circulate, unnecessary gas overflows from the ventilating pit of reactor head, water inlet, air, catalyzer and hydrogen peroxide mix in mixing zone, upwards enter the first reaction zone, there is Fenton's reaction, because the first heavy sleeve upper edge is higher than overflow groove upper edge, pending solution forms secondary downwards and refluxes between triple sleeves, granules of catalyst herein controlled classification refluxes, after reaction solution flows down between triple sleeves, the pending solution of part enters periphery, waste water continues to be degraded in second reaction zone, if use granules of catalyst, granules of catalyst can separate to realize solid-liquid by stable settlement, supernatant liquor after treatment is discharged through overflow groove and water outlet, part waste water and catalyzer are back to the mixing zone of bottom through baffle effect, with backward upper the flowing of water inlet air mixed.
2. a kind of universal internal recycle Fenton reactor of processing organic wastewater with difficult degradation thereby according to claim 1, is characterized in that, triple sleeves of described lower openings, and upper cartridge is cylindrical, and centre is horn-like, and bottom is the cylindrical drum with large breach.
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| CN103803694B (en) * | 2013-12-25 | 2015-05-20 | 江苏一环集团有限公司 | Integrated efficient Fenton precipitation device |
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| CN107619099B (en) * | 2017-10-17 | 2024-02-23 | 中冶赛迪技术研究中心有限公司 | Internal circulation Fenton reactor |
| CN108975642A (en) * | 2018-09-28 | 2018-12-11 | 南京理工大学泰州科技学院 | Integrated ozone catalysis oxidation-biological aerated filter |
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| CN109967087B (en) * | 2019-03-20 | 2020-11-20 | 浙江大学 | Immobilized heterogeneous Fenton catalyst and preparation method and application thereof |
| CN111908649A (en) * | 2020-06-15 | 2020-11-10 | 安徽工程大学 | Advanced oxidation reaction column for advanced wastewater treatment |
| CN112851078A (en) * | 2021-03-26 | 2021-05-28 | 中船重工重庆智能装备工程设计有限公司 | Automatic medicine adding device and spiral extrusion dewatering system |
| CN113087113B (en) * | 2021-03-30 | 2022-11-01 | 哈尔滨工业大学（深圳） | Efficient heterogeneous Fenton-like reactor for high-salt refractory wastewater and application |
| CN113371886B (en) * | 2021-07-12 | 2023-05-09 | 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 |
| CN114715847B (en) * | 2022-03-22 | 2023-06-02 | 中国矿业大学 | Dual-fuel supply type variable flow reformer and operation method |
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