CN1290774C - Continual immersion type processing unit of photocatalysis membrane for removing natural organic matter in water - Google Patents
Continual immersion type processing unit of photocatalysis membrane for removing natural organic matter in water Download PDFInfo
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- CN1290774C CN1290774C CN 200510016297 CN200510016297A CN1290774C CN 1290774 C CN1290774 C CN 1290774C CN 200510016297 CN200510016297 CN 200510016297 CN 200510016297 A CN200510016297 A CN 200510016297A CN 1290774 C CN1290774 C CN 1290774C
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Abstract
The present invention discloses a continuous immersion photocatalytic membrane treatment device for removing natural organic matter in water, which belongs to techniques for treating slightly polluted water bodies and drinking water. The device comprises a fiber bundle filter, a reactor integrating photocatalysis and immersion micropore filtration, an air compressor and a suction pump, wherein the reactor comprises at least three ultraviolet lamps and a micro-filter membrane filter distributed in an enclosed cylinder, and a light shielding plate is arranged among the ultraviolet lamps and the micro-filter membrane filter. An aeration plate is arranged below the micro-filter membrane filter and is connected with the air compressor, an electromagnetic control valve is arranged on a connecting pipeline, the outlet pipeline of the micro-filter membrane filter is respectively connected with the suction pump and the air compressor, and photocatalysts in the reactor are granular nanometer TiO2. The device of the present invention can be used for treating the natural organic matter in the water, has the characteristics of high treatment efficiency and low treatment cost, is capable of reducing COD<Mn> and TOC in discharged water, and is also capable of greatly reducing pathogenic bacteria, bacteria, etc. in the discharged water.
Description
Technical field
The invention belongs to micropollutant water and technical field of drinking water treatment, particularly a kind of design of continuously-submerged photocatalysis membrana water treatment device.
Background technology
Soil ulmin is the representative substances of the natural middle organism (NOM) of water body, is the widest natural complex compound that distributes on the earth.Soil ulmin generally is divided into three parts: i.e. humic acid, fulvic acid, hymatomelanic acid.Because natural organic matter exists in water generally, widely, water quality and water treatment procedure there is significant effects, particularly when chlorination, natural organic matter is the main precursor of disinfection byproduct (DBP) (DBPs), therefore, control cholorination by product has become the major issue that countries in the world pay close attention to for water treatment circle.Traditional natural organic matter (clearance is generally more than 10-50%) with removal macromolecules such as flocculation, filtrations, also the someone studies with methods such as anionresin, absorption, ultrafiltration, reverse osmosis membranes and removes, but these methods are not fundamentally with organic matter removal, but the transfer of pollutent phase.
Photocatalytic degradation is that the exploitation of an emerging quite rising water technology, particularly nm-class catalyst makes light-catalyzed reaction system have higher efficient.A large amount of both at home and abroad photochemical catalysis experimental studies confirm, nano level TiO2 can with 300 surplus kind of organic compound carry out light-catalyzed reaction, decolouring, detoxification, mineralising is nontoxic inorganic molecules material, thereby eliminate pollution to environment, and do not need to use chemical agent, avoid producing the problem of mud and sludge treatment.At present influence the photocatalysis technology practical application and mainly have two problems: the one, catalyzer separates with water body, and the 2nd, the raising of light-catalyzed reaction efficient.Research has proved that the light-catalyzed reaction system of suspension type is than loading type photocatalytic system efficient height.
Many employing membrane filtration isolation technique and the effective combination of photocatalysis oxidation technique in Shen Qing the patent in the past, thereby realized the problem that catalyzer effectively separates and recycles from water body in reactor, water treatment procedure is moved continuously, but also there is following drawback: because the photocatalyst that adopts is a powdered form, can occur ultraviolet lamp lamp wall surface during long-play and dirt settling occur, the projection efficiency of light reduces greatly to assemble easily in water with catalyzer and loses activity, is difficult to the problem of cyclically utilizing; The powdered form catalyzer causes the fenestra road to stop up at the film surface deposition easily in addition, and film is seriously polluted, and membrane flux descends very fast, causes the film cleaning interval to shorten, and has limited the photocatalysis membrana reactive system and has moved continuously.If when containing iron in the water body in addition, can when light-catalyzed reaction, stick to the through performance that the quartz socket tube outer wall has had a strong impact on light.
Summary of the invention
The object of the present invention is to provide a kind of continuously-submerged photocatalytic membrane treatment equipment of removing natural organic matter in the water, this device is removed natural organic matter efficient height in the water, long service life.
The present invention is realized by following technical proposals, natural organic matter continuously-submerged photocatalytic membrane treatment equipment in a kind of removal water, it is characterized in that this device comprises that the incorporate reactor 4 of fiber bundle filter 3, integrated photocatalysis and immersion millipore filtration that goes turbid and iron ions of water, the suction pump 10 that supplies microporous filtration recoil and photocatalyst suspension mobile air compressor machine 5 and microporous filtration to export constitute.Described reactor is included in the airtight cylindrical shell 4-1, be circular layout at least three low pressure ultraviolet light source 4-3 and aperture is 0.1-0.22 μ m microporous filtration 4-5, a circular-arc light barrier 4-4 is set between them, an aeration board 4-6 is set below microporous filtration, this aeration board links to each other with air compressor machine 5, magnetic valve 6,7 is set on their connection line, the outlet line of microporous filtration links to each other with air compressor machine 5 with suction pump 10 respectively, and the photocatalyst in the reactor is the particulate state nano-TiO of particle diameter 55-120 μ m
2
Above-mentioned fiber bundle filter is efficient pressure type fiber bundle filter.
The power of every above-mentioned ultraviolet lamp is 9-11w.
Above-mentioned aeration board is a micropore titanium plate, and its pore size is＜30 μ m.
The present invention has the following advantages: the present invention is owing to use particulate state nano level TiO in reactor
2Catalyzer, and combine with the immersion continuous Microfiltration makes this reactor have higher light-catalyzed reaction efficient and catalyst separating reclaims reusable purpose.Particulate state nano level TiO
2Can suspend when water body stirs again can be in free setting under the action of gravity.The bubble that the micropore titanium plate of film separation unit setting produces can make the reactor internal recycle, thereby the efficient of the light-catalyzed reaction that guarantees, flow action can delay the pollution of microfiltration membrane simultaneously, alleviate the stop probability of particulate state photocatalyst on the film surface, pellet type catalyst has also played the purpose of removing surface attachments to the ultraviolet lamp tube outer wall.The continuous millipore filtration of immersion in the regular hour from the recoil of taking offence, thereby the high-throughput of having kept film moves, and has prevented the obstruction of film, has prolonged the work-ing life of film.High-efficiency fiber beam filter device is as the pre-treatment of reactor, can obviously reduce the suspended substance of water body, colloidalmaterial, thereby reduced the turbidity of water body, also can significantly reduce the total iron content in the water, thereby Fe can not guarantee the transmitance of light attached to the quartz socket tube outer wall when ensureing light-catalyzed reaction, has strengthened light-catalyzed reaction efficient.Apparatus of the present invention are used for the processing of water natural organic matter, make full use of the Nanoparticulate photocatalyst to the capacity of decomposition of hardly degraded organic substance and the film strainability of holding back to pollutent and catalyzer.Contrast other independent advanced oxidation processes and membrane separation process, this technology has the processing efficiency height, and the characteristics that processing cost is low are a kind of novel combination procesies fully.This device not only can reduce the COD of water outlet
Mn, TOC, the pathogenic bacteria, bacterium etc. of water outlet are reduced greatly.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention
Embodiment
Further specify concrete enforcement of the present invention below in conjunction with accompanying drawing.
Submerged processing unit of photocatalysis membrane provided by the present invention comprises: the water inlet system that inlet chest 1, water pump 2, fiber bundle filter 3, water inlet pipe are formed, photochemical catalysis and immersion millipore filtration integrated reactor 4 and the outlet system of being made up of suction pump 10, water tank 12, outlet pipeline also comprise gas back-purge system and air supply system that air compressor machine 5 constitutes.The present invention also is included in and is provided with fluid level controller in the reactor, in order to the start-stop of control intake pump.Magnetic valve by time controller control is set on air feeder and pipeline in addition, makes CMFs gas recoil in specific time.
Fiber bundle filter 3 is used for reducing significantly the turbidity of water inlet, and also can remove more than 60% for the total iron in the water, thereby has guaranteed the efficient of follow-up light-catalyzed reaction, and keeps the steady running of film reaction system high efficiency.
The incorporate reactor of photochemical catalysis and immersion millipore filtration 4 inside are provided with circular-arc light barrier 4-4, low pressure UV source 4-3, quartz socket tube 4-2, immersed microfiltration film filter 4-5, circular-arc light barrier 4-4 is divided into photochemical catalysis unit and film separation unit with reactor, mobile groove is arranged up and down, at micropore titanium plate aeration board 4-6 of film separation unit design, but both realization response device water and catalyzer internal recycle, can under flow action, wash away the film surface again and slow down the film surface contamination, also can effectively prevent the sinking of particulate state photocatalyst simultaneously.This micropore titanium plate is connected with gas meter 9 by the magnetic valve 6 of time controller 8 controls, thereby links to each other with air compressor machine 5.Time controller 8 is implemented in aeration and the gas recoil of carrying out microfiltration membrane in the reactor by the break-make of control magnetic valve 6 and 7.
In reactor 4, adopt a kind of particulate state nano level TiO
2Photocatalyst, this particulate state photocatalyst not only can mix more uniformly in the aqueous solution but also have higher activity than other like product, under illumination condition, can not produce some intermediate products and attached to the quartz socket tube surface; Particulate state TiO
2Catalyzer can also contact the quartz socket tube outer wall and play the purpose of removing surface attachments under the effect of current, keep the good through performance of light, and pellet type catalyst can effectively be separated by microfiltration membrane and reclaim in addition.
Feature of the present invention also is to introduce in the reactor the continuous millipore filtration of immersion (CMFs) device, and use powerful air recoil automatic cleaning system for this equipment, utilize air that the brute force that hollow fiber microfiltration membrane carries out is from inside to outside recoiled, make part particulate state photocatalyst and film surface isolation, effectively improved water treatment capacity, realize steady running, prolonged the work-ing life of film.
Being shaped as of low pressure ultraviolet light source 4-3 is bar-shaped; be placed in the middle of the quartz socket tube 4-2; the unlatching of light source is controlled by controller 4-7; because the low-voltage light source ultraviolet lamp of selecting; so the heat that produces is very little; therefore thereby prevent that effectively residual Fe from sticking to the quartz socket tube surface, protected the transmitance of ultraviolet lamp, stable treated waste water for a long time.
Immersed microfiltration film filter 4-5 is by outlet pipeline and suction pump 10, controls the start-stop of suction pump 10 by time meter electrical equipment 11, by suction function, with mixed solution through micro-pore-film filtration, particulate state TiO
2The tunicle effectively catching is in reactor, and water outlet then is pumped in the water tank 12 by suction pump 10.
Control water inlet water pump 2 by liquidometer 4-8 during water inlet, when the liquid level in the reactor is lower than certain level, intake pump is opened, water inlet enters reactor 4 by inlet chest 1 through fiber bundle filter 3, when liquid level is higher than certain level in the reactor, intake pump stops, and makes the processing water yield in the reactor keep stable relatively.
When reactor moved continuously, air compressor machine 5 and suction pump 10 were opened, and time controller 8 control magnetic valves 6 open and cut out magnetic valve 7, and when fixing time recoil, suction pump 10 is closed, and time controller 8 control magnetic valves 6 cut out and open magnetic valve 7 and carry out the gas recoil.
Embodiment:
Treatment time: 30min;
Photocatalyst dosage: 1.5g/L;
TOC after the processing is 1.6mg/L.
Treatment time: 40min;
Photocatalyst dosage: 1.5g/L;
TOC after the processing is 2.1mg/L.
Embodiment 3 gets certain micro-polluted surface water, and its water-quality guideline is: turbidity 10-15, and TOC is 6.2mg/L, handles under the following conditions:
Treatment time: 60min;
Catalyst amounts: 1.5g/L;
It is as shown in table 1 to handle back water quality:
Table 1 embodiment 3 handles back water quality
| Detect index | Before the processing | After the processing | Clearance (%) |
| Turbidity (NTU) | 10-15 | 0 | 100 |
| TOC | 6.2 | 1.4 | 77.4 |
Claims (4)
1. remove natural organic matter continuously-submerged photocatalytic membrane treatment equipment in the water for one kind, it is characterized in that, this device comprises the fibre bundle filtration dress device (3) that goes turbid and iron ions of water, integrated photocatalysis and the incorporate reactor of immersion millipore filtration (4), suction pump (10) for microporous filtration recoil and photocatalyst suspension mobile air compressor machine (5) and microporous filtration outlet, described reactor is included in the airtight cylindrical shell (4-1), be circular layout at least three low pressure ultraviolet light sources (4-3) and aperture is 0.1-0.22 μ m microporous filtration (4-5), a circular-arc light barrier (4-4) is set between them, an aeration board (4-6) is set below microporous filtration, this aeration board links to each other with air compressor machine (5), magnetic valve (6 is set on their connection line, 7), the outlet line of microporous filtration links to each other with air compressor machine (5) with suction pump (10) respectively, and the photocatalyst in the reactor is the particulate state nano-TiO of particle diameter 55-120 μ m
2
2. by natural organic matter continuously-submerged photocatalytic membrane treatment equipment in the described removal water of claim 1, it is characterized in that fiber bundle filter is efficient pressure type fiber bundle filter.
3. by natural organic matter continuously-submerged photocatalytic membrane treatment equipment in the described removal water of claim 1, it is characterized in that the power of every ultraviolet lamp is 9-11w.
4. by natural organic matter continuously-submerged photocatalytic membrane treatment equipment in the described removal water of claim 1, it is characterized in that aeration board is a micropore titanium plate, its pore size is＜30 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510016297 CN1290774C (en) | 2005-03-14 | 2005-03-14 | Continual immersion type processing unit of photocatalysis membrane for removing natural organic matter in water |
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| CN 200510016297 CN1290774C (en) | 2005-03-14 | 2005-03-14 | Continual immersion type processing unit of photocatalysis membrane for removing natural organic matter in water |
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| CN1290774C true CN1290774C (en) | 2006-12-20 |
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| CN118026353A (en) * | 2024-03-28 | 2024-05-14 | 甘肃自然能源研究所(联合国工业发展组织国际太阳能技术促进转让中心) | TiO (titanium dioxide)2Microsphere photocatalysis-microfiltration membrane separation integrated reactor |
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