CN105693004A - Method for sewage treatment by magnetic nanopowder and photocatalytic oxidation - Google Patents
Method for sewage treatment by magnetic nanopowder and photocatalytic oxidation Download PDFInfo
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- CN105693004A CN105693004A CN201610090508.4A CN201610090508A CN105693004A CN 105693004 A CN105693004 A CN 105693004A CN 201610090508 A CN201610090508 A CN 201610090508A CN 105693004 A CN105693004 A CN 105693004A
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- 239000010865 sewage Substances 0.000 title claims abstract description 49
- 230000003647 oxidation Effects 0.000 title claims abstract description 39
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 11
- 239000011858 nanopowder Substances 0.000 title abstract 5
- 239000006247 magnetic powder Substances 0.000 claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000001914 filtration Methods 0.000 claims abstract description 24
- 238000000926 separation method Methods 0.000 claims abstract description 20
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 17
- 231100000719 pollutant Toxicity 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 9
- 230000003197 catalytic effect Effects 0.000 claims description 36
- 230000000694 effects Effects 0.000 claims description 17
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 11
- 238000004140 cleaning Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000011941 photocatalyst Substances 0.000 claims description 9
- 238000007146 photocatalysis Methods 0.000 claims description 8
- 239000000696 magnetic material Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 230000001902 propagating effect Effects 0.000 claims description 4
- 241000700605 Viruses Species 0.000 claims description 3
- 230000000844 anti-bacterial effect Effects 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 229910001385 heavy metal Inorganic materials 0.000 claims description 3
- 239000000271 synthetic detergent Substances 0.000 claims description 3
- 230000008929 regeneration Effects 0.000 abstract description 3
- 238000011069 regeneration method Methods 0.000 abstract description 3
- 238000003756 stirring Methods 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 1
- 239000000725 suspension Substances 0.000 abstract 1
- 238000004506 ultrasonic cleaning Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000004576 sand Substances 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000009022 nonlinear effect Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- OKTJSMMVPCPJKN-BJUDXGSMSA-N carbon-11 Chemical class [11C] OKTJSMMVPCPJKN-BJUDXGSMSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
- C02F1/325—Irradiation devices or lamp constructions
-
- 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
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
-
- 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
-
- 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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/322—Lamp arrangement
- C02F2201/3227—Units with two or more lamps
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/322—Lamp arrangement
- C02F2201/3228—Units having reflectors, e.g. coatings, baffles, plates, mirrors
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Abstract
The invention discloses a method for sewage treatment by magnetic nanopowder and photocatalytic oxidation. Sewage is sequentially treated through a treatment system which comprises a pretreatment unit, a primary filtering unit, a secondary filtering unit and a photocatalytic oxidation. A magnetic nanopowder feeding device is arranged on the upper portion of the pretreatment unit, a stirring device is arranged at the inner bottom of the pretreatment unit, and a magnetic drum and a magnetic powder recovery device are arranged on the upper portion of the primary filtering unit. The treatment system further comprises an ultrasonic separation device, a feeding end of the ultrasonic separation device is connected with the magnetic powder recovery device through a conveying belt, and a discharging end of the ultrasonic separation device is connected above the pretreatment unit through a chute. Suspensions in the sewage are intercepted by the magnetic nanopowder, the magnetic powder with pollutants is collected under the action of the magnetic drum, and the pollutants on the magnetic nanopowder are cleaned and separated under ultrasonic action. By ultrasonic cleaning, water consumption in a backwash regeneration process is greatly reduced, sewage treatment efficiency is improved, and resources are saved.
Description
Technical field
The invention belongs to environmental protection technical field, be specifically related to a kind of nano-magnetic powder photochemical catalytic oxidation sewage water treatment method。
Background technology
The deep bed sand filter based on adsorption that what current application was more is is filter medium with quartz sand。Its agent structure is to have supporting layer in cylindrical tank, is sand filter bed on supporting layer, and sand filter bed is heterogeneous body fixing hole gap structure。There are big cobble, little cobble, big stone, handstone, coarse sand, medium sand etc. from bottom to top, namely so-called " bed course ", belong to non-effective adsorption layer。On main body fine sand layer, for active adsorption layer, filter bed top also has a sizable headspace。Water inlet before one filter is arranged at the outer top of filter tank, and water out after a filter is arranged at bottom。Upper entering and lower leaving during filtration, bottom in and top out during backwash, the two is same flow process, each other reverse process。
The subject matter existed: one is that filtering accuracy is low general not up to standard。Two is adsorb easy desorption difficulty。Filter bed structure complexity belongs to again fixing hole gap structure, and therefore easily, desorption and regeneration is very difficult in absorption。Filter bed easily causes blocking, it is generally required to improve displacement flush after blocking, owing to the filter bed degree of depth is half tank, the first half is slack tank, although filter bed belongs to fixing hole gap structure, but whole filter bed stability extreme difference, often cause the mixed layer of heterogeneous body filter bed to lose efficacy during flushing, recover very difficult, therefore can affect production。Three is to extremely inadaptable containing polymer and Organic substance sewage。
After plugged filter, from back flush, the impurity filtered on filter material is rinsed out, it is possible to recover its strainability, in prior art, the regeneration rate of filter element is poor, and in backwash process, water demand is relatively big, and the flushing sewage quantity that need to discharge increases accordingly, need to improve。
Titanium dioxide optical catalyst material can produce the hole of highly active strong reducing property electronics and positively charged strong oxidizing property under light source activation, so that the Organic substance in solution occurs a series of oxidation-reduction reaction to degrade, the most little molecular organic pollutants of decomposable asymmetric choice net。Titanium dioxide is as photocatalyst applications in the process of waste water, and compared with other sewage disposal technologies, it has lot of advantages: safe and stable, waste water treatment efficiency is high, non-secondary pollution etc.。But photochemical catalytic oxidation link of the prior art, owing to sewage is in flow process, it is subject to the restriction of container, cause that current are limited with effective contact area of photocatalyst, it is necessary to find suitable method, solves effectively to utilize ultraviolet source improve its photo-catalysis capability and increase the technical problem of current and effective contact area of photocatalyst。
Summary of the invention
It is an object of the invention to provide a kind of sewage disposal one nano-magnetic powder photochemical catalytic oxidation sewage water treatment method, the method uses nano-magnetic powder photochemical catalytic oxidation sewage disposal system, described system includes pretreatment unit, primary filter unit, cascade filtration unit and photochemical catalytic oxidation unit, described pretreatment unit is open-top receptacle, the water inlet that dirty water from container bottom is arranged enters, this pretreatment unit top is provided with nano-magnetic powder delivery device, inside bottom is provided with agitating device, nano-magnetic powder is thrown in pretreatment unit, and be stirred by agitating device, nano-magnetic powder and sewage is made to be sufficiently mixed, the polymer making nano-magnetic powder adsorb fully and to retain in sewage and float；Sewage unit through pretreatment enters primary filter unit by pipeline and connects, this primary filter unit top is provided with magnetic drum and magnetic powder recovering device, this magnetic powder recovering device is arranged on magnetic drum and is connected by connection member, under the effect of magnetic drum, the magnetic powder being adsorbed with pollutant is collected and reclaims by magnetic powder recovering device, it is provided with water pump between the pipeline that described primary filter unit is connected with cascade filtration unit, the water purified through primary filter enters cascade filtration unit by pipeline, described cascade filtration unit is internal fills activated carbon, owing to its porous adsorbs the fine material in various water during filtration, remove larger molecular organics and heavy metal, synthetic detergent, the polluter such as antibacterial and virus；The water side at described cascade filtration unit top is connected to the water inlet end of photochemical catalytic oxidation unit bottom by pipeline, the inwall of described photochemical catalytic oxidation unit also covers and is provided with reflector layer, this photochemical catalytic oxidation unit is internally provided with snakelike bulkhead, this bulkhead is coated with photocatalysis film layer, described photocatalysis film layer is composite titania material, and it is provided with ultra-violet lamp among the gap of bulkhead, the lateral wall of described photochemical catalytic oxidation unit is provided with paired ultrasonic transducer, ultrasonic frequency is higher than 20000 hertz, the acoustic pressure of positive and negative alternation can be produced when propagating, form jet, further increase effective contact area of current and photocatalyst, and then strengthen photochemical catalytic oxidation effect；The water side at this photochemical catalytic oxidation unit top is connected to outlet by pipeline。
Preferably, this sewage disposal system also includes ultrasonic separation device, the feed end of described ultrasonic separation device is connected by conveyer belt with magnetic powder recovering device, described conveyer belt is made up of magnetic material, the magnetic powder retaining pollutant is made to be easier to be adsorbed on conveyer belt, entrance ultrasonic separation device it is conveyed efficiently thus more stable, the discharge end of ultrasonic separation device is connected to the top of pretreatment unit by the guide groove being obliquely installed, described ultrasonic separation device bottom is additionally provided with sewage draining exit, by the cleaning of the pollutant adsorbed on nano-magnetic powder and separate under hyperacoustic effect, pollutant are with a small amount of sewage discharge, the guide groove passing through to be obliquely installed through the nano-magnetic powder of ultrasonic waves for cleaning is added in the sewage of pretreatment unit, carry out sewage disposal process next time。
Preferably, described conveyer belt 17 is made up of magnetic material。
Compared with prior art, the invention has the beneficial effects as follows:
1, the present invention adopts nano-magnetic powder to adsorb the float retaining in sewage, under the effect in the magnetic field of magnetic drum, collect the magnetic powder having adsorbed pollutant, import in ultrasonic separation device by conveyer belt, by the cleaning of the pollutant adsorbed on nano-magnetic powder and separate under hyperacoustic effect, pollutant are with a small amount of sewage discharge, recycle through the nano-magnetic powder of ultrasonic waves for cleaning, strengthen the absorption crown_interception of float and organic polymer in sewage, ultrasonic waves for cleaning greatly reduces the water consumption in backwash regenerative process, and then improve the efficiency of sewage disposal, nano-magnetic powder recycles and reduces consumptive material use, economize on resources。
2, on the inwall of photochemical catalytic oxidation unit of the present invention, also covering is provided with reflector layer, this reflector layer effectively utilizes ultraviolet source to improve its photo-catalysis capability, snakelike bulkhead adds the distance that water is passed by a reservoir, making the distance that raw water is walked in clean unit longer, increase the contact area of water and photocatalyst rete, reflector layer is aluminium coat or silvering, improve the exposure rate of ultraviolet light, improve reaction rate, strengthen clean-up effect further, thus improving clean-up effect。The lateral wall of photochemical catalytic oxidation unit is provided with paired ultrasonic transducer, ultrasound wave is the sound wave that frequency is higher than 20000 hertz, its good directionality, penetration capacity is strong, the ultrasonic acoustic pressure that can produce positive and negative alternation when propagating, and forms jet, simultaneously because nonlinear effect can produce acoustic streaming and micro-acoustic streaming, increase stirring, diffusion, further increase effective contact area of current and photocatalyst, and then strengthen photochemical catalytic oxidation effect。
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram。
In figure: 1 pretreatment unit, 2 primary filter unit, 3 cascade filtration unit, 4 photochemical catalytic oxidation unit, 5 water inlets, 6 nano-magnetic powder delivery devices, 7 agitating devices, 8 magnetic drums, 9 magnetic powder recovering devices, 10 water pumps, 11 activated carbons, 12 reflector layers, 13 bulkhead, 14 ultra-violet lamps, 15 outlets, 16 ultrasonic separation devices, 17 conveyer belts, 18 guide grooves, 19 sewage draining exits, 20 ultrasonic transducers。
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments。Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention。
Refer to Fig. 1, the present invention provides a kind of nano-magnetic powder photochemical catalytic oxidation sewage water treatment method, the method uses nano-magnetic powder photochemical catalytic oxidation sewage disposal system, including pretreatment unit 1, primary filter unit 2, cascade filtration unit 3 and photochemical catalytic oxidation unit 4, described pretreatment unit 1 is open-top receptacle, bottom is provided with water inlet 5, this pretreatment unit 1 top is provided with nano-magnetic powder delivery device 6, and pretreatment unit 1 inside bottom is provided with agitating device 7, nano-magnetic powder is thrown in pretreatment unit 1, and be stirred by agitating device 7, nano-magnetic powder and sewage is made to be sufficiently mixed, the polymer making nano-magnetic powder adsorb fully and to retain in sewage and float；
This pretreatment unit 1 is connected with primary filter unit 2 by pipeline, this primary filter unit 2 top is provided with magnetic drum 8 and magnetic powder recovering device 9, this magnetic powder recovering device 9 is arranged on magnetic drum 8 and is connected by connection member, under the effect of magnetic drum 8, the magnetic powder being adsorbed with pollutant is collected and reclaims by magnetic powder recovering device 9, it is provided with water pump 10 between the pipeline that described primary filter unit 2 is connected with cascade filtration unit 3, the water purified through primary filter enters cascade filtration unit 3 by pipeline, described cascade filtration unit 3 is internal fills activated carbon 11, owing to its porous adsorbs the fine material in various water during filtration, remove larger molecular organics and heavy metal, synthetic detergent, the polluter such as antibacterial and virus；
The water side at described cascade filtration unit 3 top is connected to the water inlet end bottom photochemical catalytic oxidation unit 4 by pipeline, the inwall of described photochemical catalytic oxidation unit 4 also covers and is provided with reflector layer 12, this photochemical catalytic oxidation unit 4 is internally provided with snakelike bulkhead 13, this bulkhead 13 is coated with photocatalysis film layer, described photocatalysis film layer is composite titania material, what titanium oxide film layer was more stable is attached on baffles, increase robustness, and among the gap of bulkhead 13, it is provided with ultra-violet lamp 14, make the distance that raw water is walked in clean unit longer, increase the contact area of water and photocatalyst rete, described reflector layer 12 is aluminium coat, silvering, improve the exposure rate of ultraviolet light, improve reaction rate, strengthen clean-up effect further, thus improving clean-up effect；The lateral wall of described photochemical catalytic oxidation unit 4 is provided with paired ultrasonic transducer 20, ultrasound wave is the sound wave that frequency is higher than 20000 hertz, its good directionality, penetration capacity is strong, the ultrasonic acoustic pressure that can produce positive and negative alternation when propagating, and forms jet, simultaneously because nonlinear effect can produce acoustic streaming and micro-acoustic streaming, increase stirring, diffusion, further increase effective contact area of current and photocatalyst, and then strengthen photochemical catalytic oxidation effect；The water side at this photochemical catalytic oxidation unit 4 top is connected to outlet 15 by pipeline so that needs the water of purified treatment and each filter element to be fully contacted, reaches best filter effect；
This sewage disposal system also includes ultrasonic separation device 16, the feed end of described ultrasonic separation device 16 is connected by conveyer belt 17 with magnetic powder recovering device 9, described conveyer belt 17 is made up of magnetic material, the magnetic powder retaining pollutant is made to be easier to be adsorbed on conveyer belt 17, entrance ultrasonic separation device 16 it is conveyed efficiently thus more stable, the discharge end of ultrasonic separation device 16 is connected to the top of pretreatment unit 1 by the guide groove 18 being obliquely installed, described ultrasonic separation device 16 bottom is additionally provided with sewage draining exit 19, by the cleaning of the pollutant adsorbed on nano-magnetic powder and separate under hyperacoustic effect, pollutant are with a small amount of sewage discharge, the guide groove 18 passing through to be obliquely installed through the nano-magnetic powder of ultrasonic waves for cleaning is added in the sewage of pretreatment unit 1, carry out sewage disposal process next time, ultrasonic waves for cleaning reduces the water consumption in backwash regenerative process, and then improve the efficiency of sewage disposal, nano-magnetic powder recycles and reduces consumptive material use, economize on resources。
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, being appreciated that and these embodiments can be carried out multiple change, amendment, replacement and modification without departing from the principles and spirit of the present invention, the scope of the present invention be defined by the appended。
Claims (3)
1. a nano-magnetic powder photochemical catalytic oxidation sewage water treatment method, the method uses nano-magnetic powder photochemical catalytic oxidation sewage disposal system, and described system includes pretreatment unit, primary filter unit, cascade filtration unit and photochemical catalytic oxidation unit；It is characterized in that, described pretreatment unit is open-top receptacle, the water inlet that dirty water from container bottom is arranged enters, this pretreatment unit top is provided with nano-magnetic powder delivery device, inside bottom is provided with agitating device, throws in nano-magnetic powder, and be stirred by agitating device in pretreatment unit, make nano-magnetic powder and sewage be sufficiently mixed, make nano-magnetic powder adsorb fully and the polymer that retains in sewage and float；Sewage unit through pretreatment enters primary filter unit by pipeline and connects, this primary filter unit top is provided with magnetic drum and magnetic powder recovering device, this magnetic powder recovering device is arranged on magnetic drum and is connected by connection member, under the effect of magnetic drum, the magnetic powder being adsorbed with pollutant is collected and reclaims by magnetic powder recovering device, it is provided with water pump between the pipeline that described primary filter unit is connected with cascade filtration unit, the water purified through primary filter enters cascade filtration unit by pipeline, described cascade filtration unit is internal fills activated carbon, owing to its porous adsorbs the fine material in various water during filtration, remove larger molecular organics and heavy metal, synthetic detergent, the polluter such as antibacterial and virus；The water side at described cascade filtration unit top is connected to the water inlet end of photochemical catalytic oxidation unit bottom by pipeline, the inwall of described photochemical catalytic oxidation unit also covers and is provided with reflector layer, this photochemical catalytic oxidation unit is internally provided with snakelike bulkhead, this bulkhead is coated with photocatalysis film layer, described photocatalysis film layer is composite titania material, and it is provided with ultra-violet lamp among the gap of bulkhead, the lateral wall of described photochemical catalytic oxidation unit is provided with paired ultrasonic transducer, ultrasonic frequency is higher than 20000 hertz, the acoustic pressure of positive and negative alternation can be produced when propagating, form jet, further increase effective contact area of current and photocatalyst, and then strengthen photochemical catalytic oxidation effect；The water side at this photochemical catalytic oxidation unit top is connected to outlet by pipeline。
2. nano-magnetic powder photochemical catalytic oxidation sewage water treatment method according to claim 1, it is characterized in that: this sewage disposal system also includes ultrasonic separation device, the feed end of described ultrasonic separation device is connected by conveyer belt with magnetic powder recovering device, described conveyer belt is made up of magnetic material, the magnetic powder retaining pollutant is made to be easier to be adsorbed on conveyer belt, entrance ultrasonic separation device it is conveyed efficiently thus more stable, the discharge end of ultrasonic separation device is connected to the top of pretreatment unit by the guide groove being obliquely installed, described ultrasonic separation device bottom is additionally provided with sewage draining exit, by the cleaning of the pollutant adsorbed on nano-magnetic powder and separate under hyperacoustic effect, pollutant are with a small amount of sewage discharge, the guide groove passing through to be obliquely installed through the nano-magnetic powder of ultrasonic waves for cleaning is added in the sewage of pretreatment unit, carry out sewage disposal process next time。
3. nano-magnetic powder photochemical catalytic oxidation sewage water treatment method according to claim 2, it is characterised in that: described conveyer belt is made up of magnetic material。
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| CN201610090508.4A CN105693004A (en) | 2016-02-18 | 2016-02-18 | Method for sewage treatment by magnetic nanopowder and photocatalytic oxidation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610090508.4A CN105693004A (en) | 2016-02-18 | 2016-02-18 | Method for sewage treatment by magnetic nanopowder and photocatalytic oxidation |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108383289A (en) * | 2018-05-03 | 2018-08-10 | 长春工程学院 | Utilize the device and method of heavy metal in magnetic Nano material treated sewage |
| CN113264630A (en) * | 2021-05-18 | 2021-08-17 | 长江大学 | Fracturing flow-back fluid purification treatment system |
| US20210387875A1 (en) * | 2020-06-12 | 2021-12-16 | University Of Florida Research Foundation, Inc. | Methods of separating ultrafine pollutant particles from aqueous suspension |
| CN117550726A (en) * | 2023-12-15 | 2024-02-13 | 安徽环境科技集团股份有限公司 | Pipeline type underground water chromium pollution removal system and method |
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| KR20030087801A (en) * | 2002-05-10 | 2003-11-15 | 한국기계연구원 | Wastewater treatment apparatus and method using ultrasonic generator and photo-catalytic material |
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