CN114014474A - Continuous photocatalytic lake water purification device and purification method - Google Patents
Continuous photocatalytic lake water purification device and purification method Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000000746 purification Methods 0.000 title claims description 24
- 239000000919 ceramic Substances 0.000 claims abstract description 55
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 31
- 230000004298 light response Effects 0.000 claims abstract description 24
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 239000004113 Sepiolite Substances 0.000 claims abstract description 15
- 229910052624 sepiolite Inorganic materials 0.000 claims abstract description 15
- 235000019355 sepiolite Nutrition 0.000 claims abstract description 15
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 14
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000011941 photocatalyst Substances 0.000 claims abstract description 11
- 238000000498 ball milling Methods 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 9
- 238000007146 photocatalysis Methods 0.000 claims abstract description 8
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229960000583 acetic acid Drugs 0.000 claims abstract description 7
- 238000001354 calcination Methods 0.000 claims abstract description 7
- 239000008367 deionised water Substances 0.000 claims abstract description 7
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 7
- 239000012362 glacial acetic acid Substances 0.000 claims abstract description 7
- 229940102253 isopropanolamine Drugs 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 4
- 239000012528 membrane Substances 0.000 claims description 8
- 229910052724 xenon Inorganic materials 0.000 claims description 8
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 8
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 6
- 239000000440 bentonite Substances 0.000 claims description 6
- 229910000278 bentonite Inorganic materials 0.000 claims description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 6
- 239000010440 gypsum Substances 0.000 claims description 6
- 229910052602 gypsum Inorganic materials 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 5
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 229910010293 ceramic material Inorganic materials 0.000 abstract 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 239000008358 core component Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 229910010272 inorganic material Inorganic materials 0.000 description 3
- 239000011147 inorganic material Substances 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000013032 photocatalytic reaction Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 238000009489 vacuum treatment Methods 0.000 description 2
- 238000003911 water pollution Methods 0.000 description 2
- UDIQNVMCHWHTBT-UHFFFAOYSA-N 5-phenylcyclohexa-2,4-dien-1-one Chemical compound C1(=CC=CC=C1)C1=CC=CC(C1)=O UDIQNVMCHWHTBT-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 238000009295 crossflow filtration Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 229940088597 hormone Drugs 0.000 description 1
- 239000005556 hormone Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Catalysts (AREA)
Abstract
The invention relates to a device and a method for purifying lake water body by continuous photocatalysis. The preparation method of the ceramic net comprises the steps of crushing sepiolite into small blocks, carrying out ball milling to obtain sepiolite powder, putting the sepiolite powder into a rotary granulating pot, adding the substances, uniformly mixing, granulating, forming, pressing into a green body, drying, and putting into a roller kiln to be sintered into the ceramic net. The preparation method of the photocatalyst comprises the following steps: mixing titanium tetraisopropoxide and isopropanolamine, and stirring continuously; mixing glacial acetic acid with deionized water to adjust the pH of the solution; dropwise adding the mixture and stirring the mixture to obtain TiO2And (3) sol. The preparation method of the visible light response photocatalysis ceramic net comprises the steps of mixing TiO2The sol is sprayed on a ceramic net and then is put into a muffle furnace for calcination to obtain the ceramic material. Enhancing photo-catalysisThe water body purifying efficiency is improved.
Description
Technical Field
The invention relates to a device and a method for continuously photocatalytic purifying lake water, and belongs to the technical field of water treatment equipment.
Background
With the increasing degree of water pollution in recent years, most lake water bodies in China are polluted. The traditional conventional water treatment process can not well remove most organic pollutants in lake water, but also can generate a large amount of byproducts, and meanwhile, the water source water pollution also has the problems that the content of organic matters in water is continuously increased, and the water quality components are more and more complex. In some river and lake water areas with refractory organic pollutants, the content of the refractory organic pollutants is increased year by year, and new pollutants such as environmental hormones and the like are found. The prior advanced treatment technology aiming at river and lake water body pollution mainly comprises the following steps: biomembrane repairing technology, artificial wetland technology, ecological floating island technology, immobilized biomembrane technology, photocatalysis technology and the like. Although research starts relatively late, the photocatalytic technology becomes a research hotspot with the unique advantages of thorough degradation of organic matters, no secondary pollution and the like.
TiO2Is one of the metal oxides which have been studied for the first time, and has attracted attention in the field of environmental improvement because of its advantages such as high oxidation-reduction potential, high catalytic efficiency, and good stability. At present TiO2The synthesis method mainly comprises a sol-gel method, a hydrothermal method, a hydrolysis method and the like. TiO synthesized by these methods2The material is mainly in a powder form, and is easy to cause quality loss and secondary pollution in the using and separating processes, so that the attenuation of the photocatalytic performance and the reduction of the service life of the catalyst are caused, and a plurality of limitations exist on the practical engineering application. Therefore, a new synthetic route is developed to realize TiO2The effective fixation of the photocatalyst makes the photocatalyst have the using capacity of continuously degrading organic matters in the water body and has very important significance.
Disclosure of Invention
In order to solve the technical problems, the invention provides a device and a method for continuously photocatalytic purifying lake water, which have the following specific technical scheme:
the device for continuously photocatalytic purifying the lake water comprises a shell tube, wherein a plurality of layers of biological filtering membranes are arranged at two ends of the shell tube, a plurality of visible light response photocatalytic ceramic nets and xenon lamp light source generators are arranged in the shell tube, the visible light response photocatalytic ceramic nets and the xenon lamp light source generators are arranged at intervals, and a support is arranged outside the shell tube.
Further, the preparation process of the visible light response photocatalytic ceramic mesh comprises the following steps:
step 1: preparing a ceramic net;
step 1.1: crushing sepiolite into small blocks, and performing ball milling with the fineness within the range of 150-300 meshes to obtain sepiolite powder;
step 1.2: putting the sepiolite powder obtained in the step 1.1 into a rotary granulating pan, adding 20-30 parts of frit, 10-20 parts of gypsum, 10-30 parts of aluminum hydroxide, 30-50 parts of bentonite and the balance of water, and uniformly mixing to obtain a mixture a;
step 1.3: granulating the mixture a obtained in the step 1.2 to obtain a mixture b;
step 1.4: molding the mixture b obtained in the step 1.3 to extrude out a green body, and drying the green body;
step 1.5: putting the green body dried in the step 1.4 into a roller kiln at 500-700 ℃ and firing the green body into a ceramic net; step 2: adhering a photocatalyst on the surface of the ceramic mesh:
step 2.1: uniformly mixing and dissolving 30-40 parts of titanium tetraisopropoxide and 50-70 parts of isopropanolamine, and continuously stirring to obtain a solution c;
step 2.2: mixing glacial acetic acid with deionized water to obtain a solution d, and adjusting the pH of the solution d to 2-6;
step 2.3: dropwise adding the solution c obtained in the step 2.1 into the solution d, and stirring for 5 hours to obtain TiO2Sol;
step 2.4: the TiO obtained in the step 2.32And (3) spraying the sol on the ceramic mesh obtained in the step 1.5, and calcining in a muffle furnace at 600-700 ℃ for 1-3 h to obtain the visible light response photocatalytic ceramic mesh.
A continuous photocatalytic lake water purification method, wherein a plurality of continuous photocatalytic lake water purification devices as claimed in claim 1 are arranged side by side in a river channel, and the axial direction of a shell tube is parallel to the water flow direction.
A continuous photocatalytic lake water purification method, wherein a plurality of continuous photocatalytic lake water purification devices as claimed in claim 1 are arranged side by side in a river channel, and the axial direction of a shell tube is parallel to the water flow direction.
The invention has the beneficial effects that: the continuous photocatalytic lake water purification device disclosed by the invention has the advantages that a power device is not needed, the lake water directly flows into the reaction tank of the photocatalytic reaction equipment, the xenon lamp light source generator and the photocatalytic ceramic net are immersed in the lake water in the reaction tank, and the turbulence formed by the lake can directly scour the membrane surface of the photocatalytic ceramic net to form cross-flow filtration, so that the membrane pollution is reduced, the photocatalytic reaction efficiency is improved, and the energy consumption is saved. The visible light response photocatalytic ceramic mesh prepared by the method realizes effective fixation of the TiO2 photocatalyst, and overcomes the defect of TiO2 photocatalyst2The photocatalyst is easy to cause the problems of quality loss and secondary pollution in the use process of treating the organic matters in the sewage. To TiO22Oxygen vacancies can be introduced by high-temperature vacuum treatment of the photocatalytic ceramic mesh, a new energy band which can form the oxygen vacancies between a titanium dioxide conduction band and a valence band can be generated, the visible light catalytic effect is facilitated, the surface oxygen vacancies can be used as charge traps, the separation efficiency of electron vacancy pairs is facilitated to be improved, and the photocatalytic activity is improved. The ceramic net used in the invention is an inorganic material, and is particularly suitable for treating polluted water in lakes due to the advantages of high thermal stability, good mechanical property, stable structure, strong chemical and microbial corrosion resistance, simple regeneration and the like of the inorganic material.
Drawings
FIG. 1 is a sectional view of a continuous photocatalytic water purification apparatus of the present invention disposed in a river;
FIG. 2 is a cross-sectional view of the continuous photocatalytic water purification apparatus of the present invention;
in the figure: 1-multilayer biological filtration membrane, 2-visible light response photocatalysis ceramic net, 3-xenon lamp light source generator, 4-bracket, 5-shell and tube.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in figures 1-2, the continuous photocatalytic lake water purification device comprises a shell tube 5, wherein a plurality of layers of biological filtration membranes 1 are respectively arranged at two ends of the shell tube 5, a plurality of visible light response photocatalytic ceramic nets 2 and xenon light source generators 3 are arranged in the shell tube, the visible light response photocatalytic ceramic nets 2 and the xenon light source generators 3 are arranged at intervals, and supports 4 are arranged at the bottoms of two ends of the tube body. The water in the river channel passes through the multilayer biological filter membrane 1, and the multilayer biological filter membrane 1 is used for pre-clarifying, removing particles and sterilizing and filtering the water in the river channel. And then the visible light responds to the photocatalytic ceramic net 2, the net has obvious photocatalytic degradation effect on organic matters in the lake water body under the irradiation of the visible light of the xenon lamp light source generator 3, the quality loss and the secondary pollution which are easily caused in the using and separating processes are overcome, and the attenuation of the photocatalytic performance and the reduction of the service life of the catalyst are prevented. The arrangement of the position is convenient for placement, and can filter and degrade pollutants in water such as all organic matters and the like as far as possible through the plurality of visible light response photocatalytic ceramic nets 2, so that the water body which is as clear as possible and free of impurities is obtained finally.
A plurality of continuous photocatalytic lake water purification devices are arranged in a river channel side by side, the continuous photocatalytic lake water purification device can adapt to river channels with various widths, and the size of the device can be designed according to the river channel. Is convenient and efficient.
A method of making a ceramic web, comprising the steps of:
step 1.1: crushing sepiolite into small blocks, and performing ball milling with the fineness within the range of 150-300 meshes to obtain sepiolite powder;
step 1.2: putting the sepiolite powder obtained in the step 1.1 into a rotary granulating pan, adding 20-30 parts of frit, 10-20 parts of gypsum, 10-30 parts of aluminum hydroxide, 30-50 parts of bentonite and the balance of water, and uniformly mixing to obtain a mixture a;
step 1.3: granulating the mixture a obtained in the step 1.2 to obtain a mixture b;
step 1.4: molding the mixture b obtained in the step 1.3 to extrude out a green body, and drying the green body;
step 1.5: and (3) putting the green body dried in the step (1.4) into a roller kiln at 500-700 ℃ to be fired into a ceramic net. The ceramic net is made of inorganic materials, and has the advantages of high thermal stability, good mechanical property, stable structure, strong chemical and microbial corrosion resistance, simple regeneration and the like, so that the ceramic net is particularly suitable for treating polluted water bodies in lakes.
A preparation method of a photocatalyst comprises the following steps:
step 2.1: uniformly mixing and dissolving 30-40 parts of titanium tetraisopropoxide and 50-70 parts of isopropanolamine, and continuously stirring to obtain a solution c;
step 2.2: mixing glacial acetic acid with deionized water to obtain a solution d, and adjusting the pH of the solution d to 2-6;
step 2.3: dropwise adding the solution c obtained in the step 2.1 into the solution d, and stirring for 5 hours to obtain TiO2And (3) sol. To obtain TiO2And sol, which is prepared for the subsequent step of preparing the visible light response photocatalytic ceramic network.
A preparation method of a visible light response photocatalysis ceramic net 2, which is to use the TiO obtained in the step 2.32And (3) spraying the sol on the ceramic mesh obtained in the step 1.5, and calcining in a muffle furnace at 600-700 ℃ for 1-3 h to obtain the visible light response photocatalytic ceramic mesh 2. The preparation method of the visible light response photocatalysis ceramic net realizes TiO2The effective fixation of the photocatalyst overcomes the defects of TiO2The photocatalyst is easy to cause the problems of quality loss and secondary pollution in the use process of treating the organic matters in the sewage. To TiO22The high temperature vacuum treatment of the photocatalytic ceramic mesh can introduce oxygen vacancies,can generate a new energy band with the formable oxygen vacancy between the conduction band and the valence band of the titanium dioxide, is beneficial to the visible light catalytic effect, and the surface oxygen vacancy can be used as a charge trap, thereby being beneficial to improving the separation efficiency of electron vacancy pairs and further improving the photocatalytic activity.
The technical effects of the present invention are illustrated by the following examples:
example 1
1. Crushing a large sepiolite block into a small block shape, ball-milling the small block shape, wherein the ball-milling fineness is set within the range of 150-mesh and 300-mesh, putting the ball-milled raw materials into a rotary granulating pot, adding 25 parts of frit, 15 parts of gypsum, 20 parts of aluminum hydroxide, 40 parts of bentonite and water into the rotary granulating pot for granulation, and molding the prepared granules to obtain a green body. And (3) putting the dried green body into a roller kiln, and firing the green body into a ceramic net at 600 ℃.
2. Uniformly mixing 40 parts of titanium tetraisopropoxide and 60 parts of isopropanolamine, continuously stirring to obtain a solution A, mixing glacial acetic acid and deionized water according to a certain proportion to obtain a solution B, adjusting the pH value of the solution B to be 3, dropwise adding the solution A into the solution B, and violently stirring for 5 hours to obtain TiO2 sol.
3. And spraying the TiO2 sol on a ceramic net, and calcining the ceramic net in a muffle furnace at 650 ℃ for 2h to obtain the visible light response photocatalytic ceramic net.
4. A set of continuous photocatalytic water purification equipment is assembled by taking a visible light response photocatalytic ceramic tile net as a core component.
Example 2
1. Crushing a large sepiolite block into a small block shape, ball-milling the small block shape, wherein the ball-milling fineness is set within the range of 150-mesh and 300-mesh, putting the ball-milled raw materials into a rotary granulating pot, adding 25 parts of frit, 15 parts of gypsum, 20 parts of aluminum hydroxide, 40 parts of bentonite and water into the rotary granulating pot for granulation, and molding the prepared granules to obtain a green body. And (3) putting the dried green body into a roller kiln, and firing the green body into a ceramic net at 600 ℃.
2. Uniformly mixing 35 parts of titanium tetraisopropoxide and 65 parts of isopropanolamine, continuously stirring to obtain a solution A, mixing glacial acetic acid and deionized water according to a certain proportion to obtain a solution B, adjusting the pH value of the solution B to be 4, dropwise adding the solution A into the solution B, and violently stirring for 5 hours to obtain TiO2 sol.
3. And spraying the TiO2 sol on a ceramic net, and calcining the ceramic net in a muffle furnace at 650 ℃ for 2h to obtain the visible light response photocatalytic ceramic net.
4. A set of continuous photocatalytic water purification equipment is assembled by taking a visible light response photocatalytic ceramic tile net as a core component.
Example 3
1. Crushing a large sepiolite block into a small block shape, ball-milling the small block shape, wherein the ball-milling fineness is set within the range of 150-mesh and 300-mesh, putting the ball-milled raw materials into a rotary granulating pot, adding 25 parts of frit, 15 parts of gypsum, 20 parts of aluminum hydroxide, 40 parts of bentonite and water into the rotary granulating pot for granulation, and molding the prepared granules to obtain a green body. And (3) putting the dried green body into a roller kiln, and firing the green body into a ceramic net at 600 ℃.
2. Uniformly mixing and dissolving 30 parts of titanium tetraisopropoxide and 70 parts of isopropanolamine, continuously stirring to obtain a solution A, mixing glacial acetic acid and deionized water according to a certain proportion to obtain a solution B, adjusting the pH value of the solution B to be 5, dropwise adding the solution A into the solution B, and violently stirring for 5 hours to obtain TiO2 sol.
3. And spraying the TiO2 sol on a ceramic net, and calcining the ceramic net in a muffle furnace at 650 ℃ for 2h to obtain the visible light response photocatalytic ceramic net.
4. A set of continuous photocatalytic water purification equipment is assembled by taking a visible light response photocatalytic ceramic tile net as a core component.
Condition comparative example
And directly purifying the same water body by using other photocatalytic purification equipment, and recording the purification value of the photocatalytic purification equipment to each index of the water body.
From the above examples 1-3, it can be seen that the oxygen content, ammonia nitrogen content, total nitrogen content and total phosphorus content are all significantly reduced after one week using the apparatus of the present invention, the purification effect of the apparatus is significant, and the apparatus is convenient to manufacture, and is simpler and more efficient than the prior art.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (3)
1. The utility model provides a continuous photocatalysis purifies lake water device which characterized in that: the device comprises a shell tube (5), wherein a plurality of layers of biological filtering membranes (1) are respectively arranged at two ends of the shell tube (5), a plurality of visible light response photocatalytic ceramic nets (2) and xenon lamp light source generators (3) are arranged in the shell tube (5), the visible light response photocatalytic ceramic nets (2) and the xenon lamp light source generators (3) are arranged at intervals, and a support (4) is arranged outside the shell tube (5).
2. The continuous photocatalytic lake water purification device according to claim 1, characterized in that: the preparation process of the visible light response photocatalytic ceramic net (2) comprises the following steps:
step 1: preparing a ceramic net;
step 1.1: crushing sepiolite into small blocks, and performing ball milling with the fineness within the range of 150-300 meshes to obtain sepiolite powder;
step 1.2: putting the sepiolite powder obtained in the step 1.1 into a rotary granulating pan, adding 20-30 parts of frit, 10-20 parts of gypsum, 10-30 parts of aluminum hydroxide, 30-50 parts of bentonite and the balance of water, and uniformly mixing to obtain a mixture a;
step 1.3: granulating the mixture a obtained in the step 1.2 to obtain a mixture b;
step 1.4: molding the mixture b obtained in the step 1.3 to extrude out a green body, and drying the green body;
step 1.5: putting the green body dried in the step 1.4 into a roller kiln at 500-700 ℃ and firing the green body into a ceramic net;
step 2: adhering a photocatalyst on the surface of the ceramic mesh:
step 2.1: uniformly mixing and dissolving 30-40 parts of titanium tetraisopropoxide and 50-70 parts of isopropanolamine, and continuously stirring to obtain a solution c;
step 2.2: mixing glacial acetic acid with deionized water to obtain a solution d, and adjusting the pH of the solution d to 2-6;
step 2.3: dropwise adding the solution c obtained in the step 2.1 into the solution d, and stirring for 5 hours to obtain TiO2Sol;
step 2.4: the TiO obtained in the step 2.32And (3) spraying the sol on the ceramic mesh obtained in the step (1.5), and calcining in a muffle furnace at 600-700 ℃ for 1-3 h to obtain the visible light response photocatalytic ceramic mesh (2).
3. A continuous photocatalysis lake water body purification method is characterized in that: a plurality of continuous photocatalytic lake water purification devices as claimed in claim 1 are arranged in a river channel side by side, and the axial direction of the shell and tube (5) is parallel to the water flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110952070.7A CN114014474A (en) | 2022-01-10 | 2022-01-10 | Continuous photocatalytic lake water purification device and purification method |
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Application publication date: 20220208 |