CN110697954A - Photocatalytic degradation device for water treatment and preparation method thereof - Google Patents
Photocatalytic degradation device for water treatment and preparation method thereof Download PDFInfo
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- CN110697954A CN110697954A CN201910934704.9A CN201910934704A CN110697954A CN 110697954 A CN110697954 A CN 110697954A CN 201910934704 A CN201910934704 A CN 201910934704A CN 110697954 A CN110697954 A CN 110697954A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 238000013033 photocatalytic degradation reaction Methods 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title abstract description 8
- 230000001699 photocatalysis Effects 0.000 claims abstract description 61
- 238000001914 filtration Methods 0.000 claims abstract description 54
- 238000007789 sealing Methods 0.000 claims abstract description 33
- 238000007146 photocatalysis Methods 0.000 claims abstract description 19
- 238000010146 3D printing Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000007639 printing Methods 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 16
- 238000001035 drying Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 238000005491 wire drawing Methods 0.000 claims description 8
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- 208000034530 PLAA-associated neurodevelopmental disease Diseases 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims 4
- 230000037431 insertion Effects 0.000 claims 4
- 239000002957 persistent organic pollutant Substances 0.000 abstract description 16
- 230000003197 catalytic effect Effects 0.000 abstract description 5
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000006731 degradation reaction Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000001954 sterilising effect Effects 0.000 abstract description 2
- 241000588724 Escherichia coli Species 0.000 description 8
- 238000005070 sampling Methods 0.000 description 8
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 6
- 229960000907 methylthioninium chloride Drugs 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000013032 photocatalytic reaction Methods 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 230000007704 transition Effects 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- 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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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)
- Physical Water Treatments (AREA)
- Catalysts (AREA)
Abstract
The invention relates to a photocatalytic degradation device for water treatment and a preparation method thereof, wherein the device comprises a filtering part and a photocatalytic part which are arranged and communicated up and down, the filtering part is composed of filtering units matched with a sealing cover, and the filtering units are arranged and communicated up and down in an inserting manner; the photocatalysis part consists of photocatalysis units which are inserted and arranged up and down, the photocatalysis units comprise closed box bodies with serpentine channels, the top surfaces of the box bodies are provided with water inlets communicated with the water outlets, and the bottom surfaces of the box bodies are provided with water outlets; the top of the filter unit at the top is closed by the sealing cover, and a water inlet is formed in the sealing cover. The photocatalytic degradation device with the novel structure is used for rapidly printing the composite material with the catalytic performance into the photocatalytic degradation device with the novel structure by utilizing a 3D printing rapid forming technology, the production speed of the device is high, the precision is high, the overall process is simple, the cost is low, and meanwhile, the photocatalytic degradation device shows good organic pollutant degradation efficiency and excellent sterilization performance to a water body.
Description
Technical Field
The invention relates to application of a 3D technology in water treatment, in particular to a water treatment photocatalytic degradation device based on 3D printing forming of a photocatalytic material and a preparation method thereof.
Background
Over eighty percent of water plants use chlorination as a sterilization and disinfection means of water sources to ensure the index safety of urban drinking water. However, chlorine element remains in the water after chlorination and disinfection, which may cause certain harm to human health. Meanwhile, the application of the photocatalysis technology in water treatment is a brand-new research and development field, and the essence of the photocatalysis technology is a photochemical reaction carried out under a catalyst, so that photochemistry and catalytic chemistry are combined. The basic principle of the application of the catalyst in water treatment is that when energy photons are matched, electrons are subjected to stimulated transition to form photoproduction electron-hole pairs, and the photoproduction electron-hole pairs continuously perform oxidation-reduction reaction with substances adsorbed on the surface of the catalyst under illumination, so that the light energy is converted into chemical energy (acting with water) or the degradation of pollutants (acting with organic matters or heavy metal ions) is achieved. The structure of the existing water treatment photocatalysis device is complex, the manufacturing cost is high, and the production, installation and assembly processes of the devices are very complicated, so that the technical personnel in the field need to research and develop a device which is simple, economical and practical and has strong degradation capability to degrade organic pollutants in tap water and sterilize.
Disclosure of Invention
The invention aims to provide a photocatalytic degradation device for water treatment and a preparation method thereof.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a photocatalytic degradation device for water treatment comprises a filtering part and a photocatalytic part which are arranged and communicated from top to bottom, wherein the filtering part is formed by matching at least one filtering unit with a sealing cover, the filtering unit comprises a box body with an open top and a closed bottom and a water outlet, a filtering mechanism is arranged in the box body, and the filtering units are arranged and communicated in an up-and-down inserting manner; the photocatalysis part consists of at least one photocatalysis unit, the photocatalysis unit comprises a closed box body, baffle plates are alternately arranged on the bottom surface in the box body, gaps between the baffle plates and the inner wall of the box body form a snake-shaped channel, one end of the top surface of the box body, which corresponds to the snake-shaped channel, is provided with a water inlet communicated with a water outlet of the box body, the bottom surface of the box body, which corresponds to the snake-shaped channel, is provided with a water outlet, and the photocatalysis units are arranged and communicated in an up-and-down inserting manner; the top of the filter unit at the top is closed by the sealing cover, and a water inlet is formed in the sealing cover.
Preferably, the top surface of the box body of the photocatalytic unit is provided with ultraviolet lamps corresponding to the gaps between the flow baffles, and the ultraviolet lamps are connected in series with an external power supply and corresponding electric control switches through leads.
Preferably, the box body of the filtering unit is respectively provided with an inserting groove which is matched with and inserted into an inserting rod fixedly arranged on the upper filtering unit box body, and an inserting rod which is used for inserting and connecting an inserting groove arranged on the lower filtering unit box body; the box bodies of the photocatalytic units are respectively provided with an inserting groove which is matched with and inserted into an inserting rod fixedly arranged on the box body of the previous photocatalytic unit, and an inserting rod which is used for inserting and connecting an inserting groove arranged on the box body of the next photocatalytic unit; the bottom surface of the sealing cover is provided with an inserting rod which is used for being inserted into an inserting groove on the uppermost filtering unit box body; the inserted bar of the bottom filtering unit box body is inserted and matched with the inserted groove on the top photocatalytic unit box body.
Preferably, the filtering mechanism comprises four vertical filtering plates which are arranged around the middle point of the bottom surface of the box body at equal intervals, the internal space of the box body is separated by the four filtering plates, filtering holes are formed in the bottoms of the three adjacent vertical filtering plates, the water outlets of the two adjacent filtering units are located on two sides of the vertical filtering plate which is not provided with the filtering holes, and the water inlet of the sealing cover and the water outlet of the uppermost filtering unit are located on two sides of the vertical filtering plate which is not provided with the filtering holes.
Preferably, the bottom surface of the box body of the photocatalytic unit is a slope surface structure which is inclined downwards from the water inlet to the water outlet, and the tops of the flow baffle plates are arranged at equal height and level.
Preferably, the operating wavelength of the ultraviolet lamp light is 325 nm.
Preferably, the pore diameter of the filter pores is 1 mm.
Preferably, the height drop of the slope of the bottom surface of the box body of the photocatalytic unit is 1 cm.
Preferably, the photocatalytic degradation device for water treatment is prepared from 5-10 parts by mass of nano titanium dioxide, 95-90 parts by mass of PLA and 0-3 parts by mass of TPU.
The preparation method of the photocatalytic degradation device for water treatment comprises the following steps:
1) taking 5-10 parts by mass of nano titanium dioxide, 95-90 parts by mass of PLA and 0-3 parts by mass of TPU, drying, mixing and stirring to obtain a mixture;
2) heating and blending the mixture in an extruder, extruding and granulating to obtain a blend, and drying at 80 ℃ for 2 hours;
3) adding the dried blend obtained in the step 2) into a wire drawing machine for wire drawing to obtain a wire rod for 3D printing;
4) and 3) taking the 3D printing wire obtained in the step 3) as a raw material, respectively printing the formed cover sealing frame, the formed filter unit and the formed photocatalytic unit by using an FDM3D printer, and certainly inserting and matching the formed cover sealing frame, the formed filter unit and the formed photocatalytic unit to obtain the photocatalytic degradation device for water treatment.
The work process of the photocatalytic degradation device for water treatment is as follows:
firstly, according to the requirements of a water treatment process, selecting a proper number of filtering units and photocatalytic units for assembly, taking selecting two filtering units and two photocatalytic units as an example, inserting and matching an inserting groove at the top of a first filtering unit with an inserting rod at the bottom of a sealing cover, inserting and matching an inserting rod at the bottom of the first filtering unit with an inserting groove at the top of a second filtering unit, inserting and matching an inserting rod at the bottom of the second filtering unit with an inserting groove at the top of the first photocatalytic unit, inserting and matching an inserting rod at the bottom of the first photocatalytic unit with an inserting groove at the top of the second photocatalytic unit, and connecting an ultraviolet light power supply.
The water to be treated is led in from the water inlet of the sealing cover, water flows into the box body of the first filtering unit, and can only flow into the box body of the second filtering unit from the water outlet after passing through the filtering holes of three adjacent vertical filtering plates in sequence, and can only flow out from the water outlet after passing through the filtering holes of three adjacent vertical filtering plates in sequence, and flows into the box body from the water inlet on the box body of the first photocatalytic unit, flows along the serpentine channel between the flow baffles, finally flows into the box body of the second photocatalytic unit, flows along the serpentine channel between the flow baffles and finally flows out. Because each part of the device adopts composite material with catalytic action and ultraviolet radiation with the wavelength of 325nm, pollutants in water can be promoted to be decomposed and microorganisms in water can be killed.
Compared with the prior art, the invention has the following advantages:
1) the composite material for preparing the photocatalytic degradation device has excellent catalytic effect, and can kill microorganisms in a water body and simultaneously cause organic matters and heavy metal ions in the water body to generate oxidation-reduction reaction by being matched with ultraviolet irradiation, so that the sterilization and purification effects on the water body are realized;
2) the photocatalytic degradation device is simple in structure and reasonable in design, can prolong the contact area and the time of a water body filtering path and a catalytic material to the maximum extent, improves the effect of photocatalytic reaction, and can be preferentially assembled according to the technological requirements of water body treatment by the aid of the unit type assembly structure.
Drawings
FIG. 1 is an exploded schematic view of a photocatalytic degradation apparatus for water treatment according to an embodiment;
fig. 2 is a schematic view of the internal structure of the photocatalytic degradation device for water treatment according to the embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1-2, a photocatalysis degradation device for water treatment, the device includes upper and lower filter portion and the photocatalysis portion of setting and intercommunication, the filter portion comprises a filter unit cooperation closing cap, the filter unit includes that the top is uncovered, the bottom seals and is equipped with the square box 11 of delivery port 5, and box 11 top four corners is equipped with grafting recess 3 respectively, and the bottom four corners is equipped with inserted bar 4 respectively, and four vertical filter plates 1 around equidistant range of bottom half mid point in the box 11, and four spaces are separated by four vertical filter plates 1 to the inner space of box, and filtration pore 12 has all been seted up to the bottom of three vertical filter plates that close to, the aperture of filtration pore 12 is 1 mm. .
The bottom surface of the sealing cover 13 is provided with an inserted bar 4 and an inserted groove 3 inserted and matched with the filtering unit box body 11, the sealing cover 13 is provided with a water inlet 14, and the water inlet 14 of the sealing cover and the water outlet 5 of the filtering unit are positioned at two sides of the vertical filtering plate 1 which is not provided with filtering holes.
The photocatalysis part consists of two photocatalysis units, each photocatalysis unit comprises a closed square box body 2, baffle plates 21 are alternately arranged on the inner bottom surface of each box body 2, a snake-shaped channel is formed between the baffle plates 21 and the inner wall of each box body 2, one end of the top surface of each box body, corresponding to the snake-shaped channel, is provided with a water inlet communicated with the water outlet of the box body, and the other end of the bottom surface of each box body, corresponding to the snake-shaped channel, is provided with a water outlet 7; the four corners of the top of the box body of each photocatalytic unit are respectively provided with an inserting groove 3, the four corners of the bottom of the box body of each photocatalytic unit are provided with inserting rods 4, the two photocatalytic units are connected with the inserting grooves in an up-and-down inserting mode through the inserting rods, and the inserting grooves 3 on the box body of the uppermost photocatalytic unit are connected with the inserting rods 4 of the box body of the filtering unit in an inserting mode.
The bottom surface of the box body of the photocatalytic unit is of a slope structure which is inclined downwards from the water inlet to the water outlet 7, the height drop of the slope is 1cm, and the tops of the plurality of flow baffle plates 21 are arranged at equal height and level. The top surface of the box body of the photocatalytic unit is provided with ultraviolet lamps 9 corresponding to the gaps between the flow baffles, the ultraviolet lamps 9 are connected in series with an external power supply and corresponding electric control switches through leads, and the working wavelength of ultraviolet light is 325 nm.
The preparation method of the photocatalytic degradation device for water treatment comprises the following steps:
1) taking 5 parts of nano titanium dioxide and 95 parts of PLA by mass, drying, mixing and stirring to obtain a mixture;
2) heating and blending the mixture in an extruder, extruding and granulating to obtain a blend, and drying at 80 ℃ for 2 hours;
3) adding the dried blend obtained in the step 2) into a wire drawing machine for wire drawing to obtain a wire rod for 3D printing;
4) and 3) taking the 3D printing wire obtained in the step 3) as a raw material, respectively printing the formed cover sealing frame, the formed filter unit and the formed photocatalytic unit by using an FDM3D printer, and certainly inserting and matching the formed cover sealing frame, the formed filter unit and the formed photocatalytic unit to obtain the photocatalytic degradation device for water treatment.
Example 2
The present example is different from example 1 in that the photocatalytic section is composed of three photocatalytic units, and the others are the same.
Example 3
The difference between the present example and example 2 is that the preparation method of the photocatalytic degradation device for water treatment is as follows:
1) taking 10 parts of nano titanium dioxide, 90 parts of PLA and 3 parts of TPU according to the mass parts, drying, mixing and stirring to obtain a mixture;
2) heating and blending the mixture in an extruder, extruding and granulating to obtain a blend, and drying at 80 ℃ for 2 hours;
3) adding the dried blend obtained in the step 2) into a wire drawing machine for wire drawing to obtain a wire rod for 3D printing;
4) and 3) taking the 3D printing wire obtained in the step 3) as a raw material, respectively printing the formed cover sealing frame, the formed filter unit and the formed photocatalytic unit by using an FDM3D printer, and certainly inserting and matching the formed cover sealing frame, the formed filter unit and the formed photocatalytic unit to obtain the photocatalytic degradation device for water treatment.
Example of effects:
1) taking the photocatalytic degradation device for water treatment described in the embodiment 1, introducing a methylene blue solution containing 0.25mg/L into the water inlet of the sealing cover at a flow rate of 10L/h, sampling the finally discharged treated water after the final water discharge of the device is stable to detect the content of organic pollutants, and calculating to obtain the removal rate of the organic pollutants to be 4%.
2) Taking the photocatalytic degradation device for water treatment described in the embodiment 1, introducing a methylene blue solution containing 0.25mg/L into the water inlet of the sealing cover at a flow rate of 10L/h, starting an ultraviolet lamp and adjusting the power of the ultraviolet lamp to 20W, sampling the finally discharged treated water after the final water discharge of the device is stable, detecting the content of organic pollutants, and calculating to obtain the removal rate of the organic pollutants to be 30%.
3) Taking the photocatalytic degradation device for water treatment described in the embodiment 1, introducing a methylene blue solution containing 0.25mg/L into the water inlet of the sealing cover at a flow rate of 10L/h, starting an ultraviolet lamp and adjusting the power of the ultraviolet lamp to 40W, sampling the finally discharged treated water after the final water discharge of the device is stable, detecting the content of organic pollutants, and calculating to obtain the removal rate of the organic pollutants to be 50%.
4) Taking the photocatalytic degradation device for water treatment described in embodiment 2, introducing a methylene blue solution containing 0.25mg/L into the water inlet of the sealing cover at a flow rate of 10L/h, starting an ultraviolet lamp and adjusting the power of the ultraviolet lamp to 40W, sampling the finally discharged treated water after the final water discharge of the device is stable, detecting the content of organic pollutants, and calculating to obtain the removal rate of the organic pollutants to be 68%.
5) Taking the photocatalytic degradation device for water treatment described in embodiment 3, introducing a methylene blue solution containing 0.25mg/L into the water inlet of the sealing cover at a flow rate of 10L/h, starting an ultraviolet lamp and adjusting the power of the ultraviolet lamp to 40W, sampling the finally discharged treated water after the final water discharge of the device is stable, detecting the content of organic pollutants, and calculating to obtain the removal rate of the organic pollutants to be 79%.
6) Taking the photocatalytic degradation device for water treatment described in embodiment 3, introducing a methylene blue solution containing 0.25mg/L into the water inlet of the sealing cover at a flow rate of 5L/h, starting an ultraviolet lamp and adjusting the power of the ultraviolet lamp to 40W, sampling the finally discharged treated water after the final water discharge of the device is stable, detecting the content of organic pollutants, and calculating to obtain the removal rate of the organic pollutants to be 87%.
7) Taking the photocatalytic degradation device for water treatment described in embodiment 3, introducing to-be-treated water containing 15000 escherichia coli at a concentration per liter into the water inlet of the sealing cover at a flow rate of 5L/h, sampling the finally discharged treated water after the final water discharge of the device is stable, and detecting that the content of the escherichia coli is 14500 escherichia coli per liter, wherein the content of the escherichia coli in the treated water exceeds the standard according to the specified index of pollutant discharge standard of urban sewage treatment plant in China.
8) Taking the photocatalytic degradation device for water treatment described in embodiment 3, introducing to-be-treated water containing 15000 escherichia coli at a concentration per liter into a water inlet of a sealing cover at a flow rate of 5L/h, starting an ultraviolet lamp and adjusting the power of the ultraviolet lamp to 40W, sampling the finally discharged treated water after the final water discharge of the device is stable, detecting that the content of the escherichia coli is 8500 per liter, and enabling the content of the escherichia coli of the treated water to reach the standard according to the specified index of pollutant discharge standard of urban sewage treatment plants in China.
The following conclusions can be drawn from the above effect examples:
1) the illumination intensity, the number of photocatalytic units and the use amount of titanium dioxide in the raw materials are improved, so that the removal efficiency of the corresponding photocatalytic degradation device on organic pollutants is also improved;
2) the reduction of the water flow velocity enables the removal efficiency of the corresponding photocatalytic degradation device on organic pollutants to be increased;
3) the photocatalytic degradation device of the ultraviolet lamp is started, so that microorganisms such as escherichia coli in the water body can be effectively killed.
Claims (10)
1. A photocatalytic degradation device for water treatment is characterized by comprising a filtering part and a photocatalytic part which are arranged and communicated from top to bottom, wherein the filtering part is formed by matching at least one filtering unit with a sealing cover, the filtering unit comprises a box body with an open top and a closed bottom and a water outlet, a filtering mechanism is arranged in the box body, and the filtering units are arranged and communicated in an up-and-down inserting manner; the photocatalysis part consists of at least one photocatalysis unit, the photocatalysis unit comprises a closed box body, baffle plates are alternately arranged on the bottom surface in the box body, gaps between the baffle plates and the inner wall of the box body form a snake-shaped channel, one end of the top surface of the box body, which corresponds to the snake-shaped channel, is provided with a water inlet communicated with a water outlet of the box body, the bottom surface of the box body, which corresponds to the snake-shaped channel, is provided with a water outlet, and the photocatalysis units are arranged and communicated in an up-and-down inserting manner; the top of the filter unit at the top is closed by the sealing cover, and a water inlet is formed in the sealing cover.
2. The photocatalytic degradation device for water treatment of claim 1, wherein the top surface of the box body of the photocatalytic unit is provided with ultraviolet lamps corresponding to the gaps between the flow baffles, and the ultraviolet lamps are connected in series with an external power supply and a corresponding electric control switch through wires.
3. The photocatalytic degradation device for water treatment according to claim 1, wherein the box body of the filter unit is respectively provided with an insertion groove for inserting an insertion rod fixedly arranged on the box body of the previous filter unit in a matching manner, and an insertion rod for inserting an insertion groove arranged on the box body of the next filter unit; the box bodies of the photocatalytic units are respectively provided with an inserting groove which is matched with and inserted into an inserting rod fixedly arranged on the box body of the previous photocatalytic unit, and an inserting rod which is used for inserting and connecting an inserting groove arranged on the box body of the next photocatalytic unit; the bottom surface of the sealing cover is provided with an inserting rod which is used for being inserted into an inserting groove on the uppermost filtering unit box body; the inserted bar of the bottom filtering unit box body is inserted and matched with the inserted groove on the top photocatalytic unit box body.
4. The photocatalytic degradation device for water treatment according to claim 1, wherein the filter mechanism comprises four vertical filter plates arranged at equal intervals around the midpoint of the bottom surface of the tank body, the four filter plates separate the internal space of the tank body, filter holes are formed in the bottoms of the adjacent three vertical filter plates, the water outlets of two adjacent filter units are positioned on two sides of the vertical filter plate on which the filter holes are not formed, and the water inlet of the seal cover and the water outlet of the uppermost filter unit are positioned on two sides of the vertical filter plate on which the filter holes are not formed.
5. The photocatalytic degradation device for water treatment according to claim 1, wherein the bottom surface of the box body of the photocatalytic unit is a slope structure that slopes downward from the water inlet to the water outlet, and the top of the plurality of baffle plates are flush with each other.
6. The photocatalytic degradation device for water treatment according to claim 2, wherein the operating wavelength of the ultraviolet lamp light is 325 nm.
7. The photocatalytic degradation device for water treatment according to claim 4, wherein the pore size of the filter pores is 1 mm.
8. The photocatalytic degradation device for water treatment according to claim 5, wherein the slope height drop of the bottom surface of the box body of the photocatalytic unit is 1 cm.
9. The photocatalytic degradation device for water treatment of any one of claims 1 to 8, characterized by being made of 5 to 10 parts by mass of nano titanium dioxide, 95 to 90 parts by mass of PLA and 0 to 3 parts by mass of TPU.
10. The method for preparing a photocatalytic degradation device for water treatment according to any one of claims 1 to 9, characterized by comprising the steps of:
1) taking 5-10 parts by mass of nano titanium dioxide, 95-90 parts by mass of PLA and 0-3 parts by mass of TPU, drying, mixing and stirring to obtain a mixture;
2) heating and blending the mixture in an extruder, extruding and granulating to obtain a blend, and drying at 80 ℃ for 2 hours;
3) adding the dried blend obtained in the step 2) into a wire drawing machine for wire drawing to obtain a wire rod for 3D printing;
4) and 3) taking the 3D printing wire obtained in the step 3) as a raw material, respectively printing the formed cover sealing frame, the formed filter unit and the formed photocatalytic unit by using an FDM3D printer, and certainly inserting and matching the formed cover sealing frame, the formed filter unit and the formed photocatalytic unit to obtain the photocatalytic degradation device for water treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910934704.9A CN110697954B (en) | 2019-09-29 | 2019-09-29 | Photocatalytic degradation device for water treatment and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910934704.9A CN110697954B (en) | 2019-09-29 | 2019-09-29 | Photocatalytic degradation device for water treatment and preparation method thereof |
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| CN112573732A (en) * | 2020-11-26 | 2021-03-30 | 湖南大有节能环保有限公司 | Container integration sewage treatment device convenient to remove |
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