CN1789151A - All-weather solar-energy photo-catalytic oxidation device with fixed film for water treatment - Google Patents
All-weather solar-energy photo-catalytic oxidation device with fixed film for water treatment Download PDFInfo
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- CN1789151A CN1789151A CNA2005101121165A CN200510112116A CN1789151A CN 1789151 A CN1789151 A CN 1789151A CN A2005101121165 A CNA2005101121165 A CN A2005101121165A CN 200510112116 A CN200510112116 A CN 200510112116A CN 1789151 A CN1789151 A CN 1789151A
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- photoreactor
- catalytic oxidation
- water treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
An all-weather water treating device with solar energy and fixed film photocatalytic oxidation, relating to a water treating device with solar energy uninfluenced by weather, comprising: clean water storge tank (1), pre-treated water storage tank (2), pretreator (3), pump (4), flowmeter (5), lighting plate (6) and photoreactor (7). The photoreactor (7) concentric structure is formed by inner pipe (16) and outer pipe (15), which is filled with two layers of fixed film catalyst and cold cathode ultraviolet lamp (20). The outer layer (17) of the fixed membrane catalyst is fixed by spring support (21), the inner layer (18) is directly coated on the outer wall of the inner pipe (16).
Description
Technical field
The present invention relates to a kind of weatherproof solar-energy photo-catalytic oxidation device with fixed film for water treatment, this device can be widely used in the advanced treatment of tap water and the preparation of high purity water, also can promote the use of the processing or and the other technologies coupling of poisonous and harmful organic wastewater with difficult degradation thereby simultaneously.
Background technology
Sun power is a kind of resourceful novel energy, after deliberation, can be used for TiO
2(λ＜400nm) is about the 3%-4% of solar radiation total amount to the sun power of photochemical catalytic oxidation water treatment, can be up to about 50W/m
2, and the sun power environmental friendliness, can not produce environmental pollution, so, with the energy of sun power, can reduce energy consumption as the photochemical catalytic oxidation water treatment, reduce processing cost, have good economic benefit and social benefit.Utilize the TiO of sun power
2The photochemical catalytic oxidation water treatment device have oxidation capacity strong, pollutent do not had characteristics such as selectivity, having broad application prospects aspect the treating water poisoning objectionable impurities.
At present, according to the difference of daylighting element, sun power TiO
2The photochemical catalytic oxidation water treatment device can be divided into two kinds of light-focusing type reactor and non-light-focusing type reactors.The light-focusing type reactor is often referred to parabola groove reactor (PTCR), and the type reactor passes through tracking device sun-tracing light, directing light is gathered be positioned at being made up of many groups of interconnected reaction tubes unit on the parabola groove focal line, and suspension type TiO is housed in the pipe
2Photochemical catalysis.Though it is feasible technically that this class solar energy photocatalytic reactor is used to handle trade effluent,, PTCR needs sun tracker, the laid down cost height, and can only utilize the direct projection solar ultraviolet radiation, optical energy utilization efficiency is lower.In addition, also there are relatively poor, the catalyzer problems such as difficult separation and recycling, initial investment and running cost height from water of adaptability that weather condition is changed in such reactor.
Along with the development of technology, the light-focusing type reactor is gradually by not only utilizing directing light but also can utilize the non-light-focusing type reactor of scattered light to be replaced.Non-light-focusing type reactor mainly contains flat-plate reactor (TFFBR) and composite parabolic reactor (CPCR).The main body of flat-plate reactor is the flat board that applies catalytic film, and reaction solution is with the film like immobilized catalyst of flowing through, and under the effect of solar ultraviolet radiation, water pollutant obtains degraded and removes.But it is low that the distinct disadvantage of this reactor is a hydraulic load, and current are generally laminar flow, has the mass transfer limit problem, and reactor efficiency is on the low side.
Composite parabolic (CPC) reactor can be reflected in all direct projections in the convergent pencil of rays scope and scattered light on the circumference of reaction tubes equably, has higher optical efficiency; And simple in structure, hydraulics is good, does not have the mass transfer limit problem; In addition, device does not need sun tracker, and construction and operation and maintenance cost are low.But present this CPC reactor adopts the suspended state catalyzer more, and catalyst separating reclaims difficulty.
In order to improve utilising efficiency to solar ultraviolet radiation, eliminate mass transfer limit, and overcome the shortcoming that the suspended state catalyst separating reclaims difficulty, patent of invention CN1699200 (application number CN200510026138.X) adopts the composite parabolic plane skylight as light collecting device, can utilize the direct projection part and the scattered portion of solar ultraviolet radiation; Use immobilized catalyst can save outstanding slurry system catalyst separating recovery process, device also has good effect of mass transmitting.But as all helioplants, this device is under the low weather condition such as overcast and rainy of solar ultraviolet radiation, and processing efficiency is low, can not realize round-the-clock high-efficient operation, is difficult to satisfy the practical engineering application needs.
Summary of the invention
The objective of the invention is to design and a kind ofly can adapt to Changes in weather, sun power TiO that can round-the-clock high-efficient operation
2Photo-catalytic oxidation device with fixed film for water treatment.That this device has is simple in structure, construction and running cost is low, speed of reaction is high, and it is big, easy to operate, stable and can realize the automatic advantage of controlling to handle the water yield, can be widely used in the advanced treatment of tap water and the preparation of high purity water.
In order to achieve the above object, the present invention is achieved in that total system comprises water tank, photo catalysis reactor assembly, pump, under meter, clear water bin.The photo catalysis reactor assembly is made up of plane skylight, photoreactor and immobilized catalyst, photo catalysis reactor assembly bottom is connected with back up pad by the hinge that is fixed on the back up pad that matches, the angle adjusting mechanism that the other end of back up pad is fixed is made up of screwed back shaft and setting nut makes the obliquity of plane skylight reach best daylighting effect.Plane skylight is made of the truncate formula composite parabolic according to design needs set amount, and every group of paraboloidal center is provided with a photoreactor, and all photoreactors are placed side by side, and link into an integrated entity by end bends, become the series connection form.Be characterized in: photoreactor is formed double-deck concentric structure by interior pipe and outer tube, outer tube adopts has very high-transmission rate, low-cost vagcor material to solar ultraviolet radiation, inner sleeve adopts the quartz socket tube that can see through the source of artificial light extreme ultraviolet light, and the both-end cold cathode low-voltage mercury lamp as secondary light source is housed in the sleeve pipe.Source of artificial light can open and close by hand or open and close by the self-con-tained unit that photo-sensitive cell triggers.At fine day or cloudy weather, device utilizes solar ultraviolet radiation for the reaction light source, opens electric light source automatically at rainy weather, adopts mixed light source, to realize round-the-clock high-efficient operation.Be filled with two-layer immobilized catalyst in the enclosed space between inner and outer pipe.Pending current when catalytic film, under the effect of solar ultraviolet radiation or electric light source uv-radiation, the oxidized decomposition of the pollutent in the water.
Advantage of the present invention is as follows:
1. because the source of artificial light that is provided with of the present invention adopts the life-span is long, light decay reduces the both-end cold cathode low-voltage mercury lamp secondary light source as solar ultraviolet radiation, and can change the keying of control electric light source automatically according to light intensity, therefore can realize round-the-clock running, make device at the very high processing efficiency of overcast and rainy also maintenance.Cold-cathode lamp places the reactor inner sleeve, and is safe in utilization and the efficiency of light energy utilization is high.
2. the present invention can make full use of solar ultraviolet radiation.Constituting truncate formula composite parabolic type plane skylight of the present invention is to tilt to place, its pitch angle can be regulated by the angle adjusting mechanism of being made up of screwed back shaft and setting nut, therefore can be fit to the geographic operation needs of different latitude, not only can utilize the direct projection part of solar ultraviolet radiation but also can utilize scattered portion, reach extraordinary treatment effect.
3. the present invention fixes the inside and outside sleeve pipe of photoreactor by special joint with the concentric(al) circles form, forms the successive enclosed space that current can pass through.Size according to design scale can in parallel or polyphone splicing amplification.Special TiO is housed in the photoreactor
2Fixed film photocatalyst, internal layer directly is coated on the silica tube, skin struts it by simple special support, makes it keep the ideal locus, has eliminated the inherent defect that uses the existing catalyst separating of suspension hydrogen-catalyst reactor, reclaims difficulty.Compact construction of the present invention is reasonable, flow-shape good, speed of reaction is high, working cost is low, easy to operate, stable.
4. TiO of the present invention
2Fixed film photocatalyst is made in that the flexible parent metal glass fibre is online, and specific surface area is big, convenient filling, light weight, good endurance, and after reusing repeatedly, treatment effect reduces seldom, good stability; The transmittance height.Under the constant situation of daylighting area, the maximized volume that utilizes reactor has improved effective catalysis area of catalyzer.
5. it is superior that the mass-transfer performance of reactor of the present invention more generally uses the fixed-film reactor of rigid carrier, under lower flow conditions, but with regard to the restriction of basically eliminate mass transfer to speed of reaction.Can be according to handling the water yield, water quality requirement flexible selecting reactor unit block employing polyphone or the mode that is connected in parallel, unit scale amplifies does not influence basic design parameters, makes simple.
Description of drawings
Fig. 1 is an all-weather solar photochemical catalytic oxidation water treatment device synoptic diagram of the present invention
Fig. 2 is that synoptic diagram is placed on device of the present invention plane
Fig. 3 is a B-B diagrammatic cross-section among device of the present invention side and Fig. 2
Fig. 4 is an A-A diagrammatic cross-section among Fig. 2
Fig. 5 is provided with synoptic diagram for photoreactor inner catalyst of the present invention and electric light source
Fig. 6 is photoresponse pipe and elbow connection diagram
Label declaration in the accompanying drawing is as follows:
1-clear water bin, the pending water storage tank of 2-, 3-pretreater, the 4-pump, 5-under meter, 6-CPC plane skylight, the 7-photoreactor, 8-sensitization self-controlled on-off device, 9-connecting bend, 10-elbow fixing hoop, 11-hinge, 12-back up pad, the 13-setting nut, 14-pole, pipe in the 15-photoreactor outer tube, 16-photoreactor, the outer catalytic film of 17-, 18-internal layer catalytic film, the 19-electric light source is cuff fixedly, the 20-electric light source, 21-stainless steel spring support, sealing nut in the 22-outer gland sealing nut, 23-, the 24-rubber seal.
Embodiment
See also accompanying drawing 1-Fig. 6.The present invention includes the self-controlled on-off device 8 that clear water bin 1, pending water storage tank 2, pretreater 3, pump 4, under meter 5, plane skylight 6, photoreactor 7 and photo-sensitive cell trigger.The core of photocatalytic reaction device is made up of CPC plane skylight 6 and photoreactor 7.Plane skylight 6 constitutes (can increase and decrease according to design requirements) by 12 groups of truncate formula composite parabolics, and every group of paraboloidal center is provided with a photoreactor 7.12 photoreactors 7 are placed side by side, and being connected in series mutually by the connecting bend 9 that is located at the end is integral, and elbow 9 is fixed by fixing hoop 10.Photo catalysis reactor assembly bottom is provided with hinge 11 and back up pad 12 flexibly connects.Be provided with angle adjusting mechanism between photocatalytic reaction device top and the back up pad 12, angle adjusting mechanism is made up of setting nut 13 and screwed pole 14.Two setting nuts 13 are fixed with back up pad 12 and photocatalytic reaction device top respectively, by rotation pole 14, the symmetrical screw thread in its two ends moved, and the angle of inclination of regulating photocatalytic reaction device reaches best daylighting position.
The outer tube 15 of photoreactor 7 can adopt at the higher vagcor of 300-400nm solar ultraviolet wave spectrum section transmittance, or silica glass etc. is preferably vycor tube as material.2 layers of special immobilized catalyst of filling in the photoreactor 7, outer layer catalyst 17 struts it by special stainless steel spring skeleton 21, is close to the inwall of photoreactor outer tube 15, and internal layer catalyst 18 is coated in the photoreactor on the pipe 16, fixes with clip.Pipe 16 adopting quartz glass in the photoreactor, to the transmissivity of 254nm short wave ultraviolet light more than 90%.Pipe is equipped with both-end cold cathode low-voltage mercury lamp 20 as electric light source in 16 in photoreactor, the two ends of lamp utilize special breathable electric light source fixedly cuff 19 fix, overheated to prevent light source.The keying of lamp can be controlled automatically by the self-controlled on-off device 8 that is triggered by photo-sensitive cell.
The outer tube 15 of photoreactor 7 is connected with the sealing nut 22 of elbow 9 by resistance to oxidation material manufacturings such as PE, ABS or PVC-U, realizes sealing by rubber seal 24.The interior pipe 16 of photoreactor 7 connects sealing by interior sealing nut 23, rubber seal 24.
The present invention is suitable for multiple TiO
2Fixing film.After being specially adapted to glass fiber mesh carried out pre-treatment in the mode of temperature-programmed calcination, adopting the sol-gel liquid of butyl (tetra) titanate, ethanol, distilled water and nitric acid preparation and soak into crystal pulling method and carry out plated film, the TiO that repetitive coatings, roasting process make
2Fixing film (preparation method's (application number 2005100261394) of the online load TiO2 of glass fibre fixed film photocatalyst).
Principle of work:
Consult Fig. 1: pending water enters before the water storage tank 2 by water inlet pipe, is introduced into by outer filter element filtering and internal layer manganese sand or Zeo-karb filter post, to remove the Fe in the water inlet
2+, Mn
2+Ion is also tackled colloid, thereby avoids poisoning of catalyst, if do not have Fe in the water inlet
2+, Mn
2+Ion can not be provided with manganese sand filtration post.After pending water enters water storage tank 2, can select whether to add H according to the Pollutant levels of water inlet
2O
2Or O
3Deng pro-oxidant.Water sample enters photoreactor 7 by pump 4 and under meter 5 and carries out light-catalyzed reaction, treats to enter clear water water storage tank 1 behind the contaminant degradation.When the processing water yield is big, can adopt the operation of a plurality of processing units polyphone Continuous Flow, the residence time can be controlled by flooding velocity.If treatment scale is less, photoreactor 7 can placed side by sidely be connected in series, and water sample is got back to water storage tank 2 after flowing through photoreactor successively, waits to finish a reaction time and discharges, and preface batch mode operation is adopted in reaction.Light-catalyzed reaction is main light source with sun power, opens artificial secondary light source at the lower rainy weather of solar ultraviolet radiation, makes total system have very high processing efficiency.
The phenol solution that with starting point concentration is 3.5mg/L is as pending water sample, system volume 25L, and water pump 4 flows are 16L/min, the average intensity of sunlight is 25.9W/m in the reaction process
2, daylighting area is 0.95m
2, the clearance of phenol reaches more than 93% behind the 180min, and device utilizes the sun power Pyrogentisinic Acid to have good removal effect.Be chosen in finely, light-intensity variation is no more than for 10% period, gets the phenol solution 25L of 7.3mg/L, daylighting area 0.95m
2, regulate that the water pump circular flow is respectively 5,12,16L/min experimentizes, the reaction times is when being 120min, the clearance of phenol can reach 71%, 74%, 75% respectively, this illustrates that mass-transfer performance of the present invention is superior, can eliminate mass transfer limit under very low circulation velocity.The present invention can realize round-the-clock running and keep very high processing power.Get the phenol solution 25L of 3.5mg/L, (corresponding average intensity is respectively 12.4,20.5,25.9W/m to be chosen in cloudy day, cloudy and fine three kinds of different weather respectively
2, daylighting area 0.95m
2) and experimentize under employing electric light source (six lamps) condition merely, circular flow is 16L/min.Under cloudy and fine condition, the degradation rate difference of phenol is little, the former is phenol degrading rate 86.6% in 180min, degradation rate 93% in the latter 180min, and lose at the cloudy day under the situation of sunlight phenol degrading rate behind the 180min also can reach 59%, illustrates that CPC daylighting element has the ability of well utilizing to the scattering UV-light.When adopting electric light source merely, through the 60min reaction, the phenol clearance can reach 98%.
Device has the good treatment effect to contaminated tap water.The starting point concentration of getting with the tap water preparation is the phenol solution 25L of 1.8mg/L, and at circular flow 16L/min, cloudy (corresponding average intensity is respectively 14.1,18,23.1W/m to cloudy, cloudy and fine three kinds of different weather
2, daylighting area 0.95m
2) adopt sun power under the condition, under the light rain weather condition, adopt mixed light source (six lamp+5.4W/m
2) experimentize.Under fine condition, through the 120min reaction, the phenol clearance can reach 93%, under the cloudy condition, through the 120min reaction, the phenol clearance can reach 82%, even arrive under the cloudy condition at the moon, through the 180min reaction, the phenol clearance also can reach 83%, under light rain weather, the mixed light source situation of employing, only need the 75min reaction, the phenol clearance can reach 95%.
Device has the good treatment effect for disinfection byproduct (DBP) trichloromethane in the tap water.Test conditions is solar energy light collecting area 0.95m
2, circular flow 16L/min, pending tap water 25L.The sun power average intensity is 17.8Wm
-2The time, starting point concentration is the trichloromethane of 81.2 μ g/L, through the processing of not enough 60min, concentration is reduced to below the 20 μ g/L; When adopting electric light source, starting point concentration is the trichloromethane of 64.1 μ g/L, only needs about 40min can drop to below the 20 μ g/L; Be about 7Wm at average intensity
-2The moon to light rain weather, open electric light source, starting point concentration is the trichloromethane of 82.5 μ g/L, through the processing of about 45min, concentration promptly is lower than 20 μ g/L.
Claims (4)
1. an all-weather solar-energy photo-catalytic oxidation device with fixed film for water treatment comprises clear water bin (1), pending water storage tank (2), pretreater (3), pump (4), under meter (5) and photo catalysis reactor assembly; The photo catalysis reactor assembly is made up of plane skylight (6), photoreactor (7) and light source self-con-tained unit (8), plane skylight (6) is made of truncate formula composite parabolic, every group of paraboloidal center is provided with a photoreactor (7), photoreactor (7) is placed side by side, and is connected in series mutually by the elbow (9) that the end is provided with and is integral; It is characterized in that: photoreactor (7) connects into concentric structure by outer tube (15) and interior pipe (16) by special elbow (9), and the both-end cold cathode low-voltage mercury lamp (20) as secondary light source is housed in the interior pipe (16); Be filled with two～three layers of immobilized catalyst in the enclosed space between inner and outer pipe.
2. all-weather solar-energy photo-catalytic oxidation device with fixed film for water treatment according to claim 1, it is characterized in that: the two ends of the cold cathode low-voltage mercury lamp of installing in the described photoreactor (7) (20) with breathable fixedly cuff (19) fix, can ventilate prevents that light source is overheated; The self-con-tained unit control that the keying of lamp (20) triggers by photo-sensitive cell.
3. all-weather solar-energy photo-catalytic oxidation device with fixed film for water treatment according to claim 1, it is characterized in that: the outer tube (15) of described photoreactor (7) and interior pipe (16) are fixed into concentric structure by rubber seal (24), outer gland sealing nut (22) and interior sealing nut (23) and elbow (9), be convenient to dismounting, filling or removal catalytic film.
4. all-weather solar-energy photo-catalytic oxidation device with fixed film for water treatment according to claim 1, it is characterized in that: the skin (17) in the described photoreactor (7) in 2 layers of immobilized catalyst of filling is to be fixed by the spring type support (21) that stainless steel is made, radially diminish because of the two ends tension during filling, when unclamp at two ends fixedly the support that strutted automatically of film be stretched in the inwall of photoreactor outer tube (15), the internal layer of immobilized catalyst (18) directly is coated on the outer wall of interior pipe (16) of photoreactor, fixes with clip.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101121165A CN1789151A (en) | 2005-12-27 | 2005-12-27 | All-weather solar-energy photo-catalytic oxidation device with fixed film for water treatment |
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|---|---|---|---|
| CNA2005101121165A CN1789151A (en) | 2005-12-27 | 2005-12-27 | All-weather solar-energy photo-catalytic oxidation device with fixed film for water treatment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102180553A (en) * | 2011-03-15 | 2011-09-14 | 南京林业大学 | Photo-catalytic oxidation water treatment device based on solar fixed film double-layer thin plate |
| CN102557182A (en) * | 2012-02-13 | 2012-07-11 | 甘肃省科学院自然能源研究所 | Multifunctional solar photocatalytic waste water treatment apparatus used for pilot tests |
| CN106732497A (en) * | 2016-11-10 | 2017-05-31 | 商洛学院 | Loaded modified TiO2The preparation method and light catalytic waste water processing device of film porous ceramic grain |
| CN107043148A (en) * | 2017-03-17 | 2017-08-15 | 江苏大学 | A kind of spiral gallery type photo catalysis reactor |
| CN107459097A (en) * | 2017-07-19 | 2017-12-12 | 河海大学 | Circulating oily water photocatalysis repair system and its operation process |
| CN107824046A (en) * | 2017-12-11 | 2018-03-23 | 贵州大学 | A kind of folded plate type filter screen photo catalysis reactor |
-
2005
- 2005-12-27 CN CNA2005101121165A patent/CN1789151A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102180553A (en) * | 2011-03-15 | 2011-09-14 | 南京林业大学 | Photo-catalytic oxidation water treatment device based on solar fixed film double-layer thin plate |
| CN102180553B (en) * | 2011-03-15 | 2012-11-28 | 南京林业大学 | Photo-catalytic oxidation water treatment device based on solar fixed film double-layer thin plate |
| CN102557182A (en) * | 2012-02-13 | 2012-07-11 | 甘肃省科学院自然能源研究所 | Multifunctional solar photocatalytic waste water treatment apparatus used for pilot tests |
| CN106732497A (en) * | 2016-11-10 | 2017-05-31 | 商洛学院 | Loaded modified TiO2The preparation method and light catalytic waste water processing device of film porous ceramic grain |
| CN107043148A (en) * | 2017-03-17 | 2017-08-15 | 江苏大学 | A kind of spiral gallery type photo catalysis reactor |
| CN107459097A (en) * | 2017-07-19 | 2017-12-12 | 河海大学 | Circulating oily water photocatalysis repair system and its operation process |
| CN107824046A (en) * | 2017-12-11 | 2018-03-23 | 贵州大学 | A kind of folded plate type filter screen photo catalysis reactor |
| CN107824046B (en) * | 2017-12-11 | 2024-03-08 | 贵州大学 | Folded plate type filter screen photocatalytic reactor |
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Open date: 20060621 |