CN212017354U - Graphene oxide-based photocatalytic oxidation inkjet printer waste gas purifier - Google Patents
Graphene oxide-based photocatalytic oxidation inkjet printer waste gas purifier Download PDFInfo
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- CN212017354U CN212017354U CN202020075381.0U CN202020075381U CN212017354U CN 212017354 U CN212017354 U CN 212017354U CN 202020075381 U CN202020075381 U CN 202020075381U CN 212017354 U CN212017354 U CN 212017354U
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Abstract
The utility model relates to an ink jet numbering machine exhaust purification technical field specifically is oxidation graphite alkene base photocatalysis oxidation ink jet numbering machine exhaust gas purifier. The air purifier comprises a purifying box body and a control system, wherein an air inlet is formed in the top end of the purifying box body, and an air outlet is formed in the bottom of the purifying box body; the inner wall of the purifying box is provided with a plurality of mounting chutes from top to bottom, and a first-stage filtering module, a first-stage ultraviolet lamp module, a first-stage photocatalytic plate, a second-stage ultraviolet lamp module, a second-stage photocatalytic plate, a third-stage ultraviolet lamp module and a third-stage photocatalytic plate are sequentially mounted on the inner wall of the purifying box; waste gas is sucked in through a top air inlet, sequentially passes through the first-stage filtering module, the first stage, the second stage, the third-stage ultraviolet lamp module and the photocatalytic plate, and finally purified gas is discharged through an air outlet.
Description
Technical Field
The utility model belongs to environmental protection engineering field to ink jet numbering machine exhaust pollution control, based on graphite oxide base combined material's nanometer titanium dioxide light catalytic oxidation technique specifically is graphite oxide base light catalytic oxidation ink jet numbering machine exhaust gas purifier.
Background
Waste gas characteristic and environmental hazard of ink jet printer
Ink and thinner of code spraying machine belong to flammable dangerous chemicals, and production and operation departments need to comply with and execute the relevant environmental protection requirements of 'dangerous chemical operation license'.
The ink and the thinner used by the ink-jet printer mainly comprise the following components: butanone (also known as methyl ethyl ketone) or acetone, and a small amount of alcohol. The ink of the ink-jet printer contains bonding materials, pigments and the like, and after the ink is adhered to a product, the pigments are firmly adhered to the surface of the product or an article by the bonding materials. The ink jet printing process volatilizes and produces pollutants such as butanone and the like. Butanone is a harsh, pungent liquid with chemical properties similar to acetone, and its vapor can form an explosive mixture with air. The medicine has the advantages of no harm to human bodies, invasion into human bodies through modes of inhalation, ingestion, percutaneous absorption and the like, irritation to eyes, noses, throats and mucous membranes, irritation, allergy, anoxia, coma, anesthesia, general poisoning, carcinogenesis, teratogenesis, mutagenesis, pneumoconiosis and the like caused by long-term contact, and coma and even death caused by one-time mass contact.
Secondly, the 'indoor air quality standard' of China puts high requirements on indoor (including factory and workshop) air pollution prevention and treatment technologies. In the new national standard of air purifiers in China, the clean air quantity, the accumulated purification quantity, the energy efficiency grade and the noise standard of the purifier are specified clearly.
Most of the existing waste gas purifiers of the ink-jet printers adopt activated carbon for adsorption, and butanone harmful waste gas cannot be effectively adsorbed and degraded, so that the emission of the butanone organic pollutants does not reach the standard and harm is brought to the environment and the human health. In order to ensure that butanone pollutants generated by volatilization of the inkjet printer in the working process reach the standard and are discharged, the inkjet printer waste gas treatment equipment with efficient adsorption and efficient purification needs to be developed urgently.
Disclosure of Invention
The utility model discloses a to the purification treatment of volatilizing in the ink jet numbering machine work and producing butyl ketone organic waste gas, be based on "graphite oxide base combined material's nanometer titanium dioxide light catalytic oxidation technique" basis, an ink jet numbering machine exhaust-gas treatment technique and equipment of special development.
The graphene oxide-based photocatalytic oxidation inkjet printer waste gas purifier comprises a purifying box body and a control system, wherein the purifying box body is of a hollow box body structure, the top end of the purifying box body is provided with an air inlet, and the bottom of the purifying box body is provided with an air outlet; the purification box body is internally provided with an exhaust fan, an air guide cover, a first-stage filtering module, a first-stage ultraviolet lamp module, a first-stage photocatalytic plate, a second-stage ultraviolet lamp module, a second-stage photocatalytic plate, a third-stage ultraviolet lamp module and a third-stage photocatalytic plate from top to bottom in sequence; the purifying box inner wall is provided with a plurality of installation spout from top to bottom, installs first order filtration module, first order ultraviolet lamp module, first order photocatalysis board, second level ultraviolet lamp module, second level photocatalysis board, third level ultraviolet lamp module, third level photocatalysis board in proper order. The exhaust fan is connected with the air guide cover, the air guide cover is connected with the air guide cover through a metal hoop, and the air guide cover is welded and fixed with the inner wall of the purifying box body.
The exhaust fan is selected to be of a low-noise oblique flow supercharging type with the exhaust volume of 900m3H, power 130W, noise<38db。
The first-stage filtering module is a plate-type structure module formed by superposing medical-grade non-woven fabrics on a nickel-based filtering net. By adopting medical-grade non-woven fabrics to be superposed on the nickel-based filter screen, the structure has good accumulation and weathering effects on particles, particularly viscous media, and is easy to remove or replace.
The first-stage ultraviolet lamp module, the second-stage ultraviolet lamp module and the third-stage ultraviolet lamp module are all composed of ultraviolet lamps and lamp brackets for mounting the lamps, the lamp brackets are provided with lamp holders and are provided with connecting wires, the ultraviolet lamps are mounted on the lamp holders, and the lamp brackets are mounted in mounting sliding grooves of the purifying box body. The ultraviolet lamp in the first-stage ultraviolet lamp module is a C-band ultraviolet lamp, the ultraviolet wavelength is an ultraviolet lamp with 185nm +254nm composite wavelength (a common general uv lamp), and the power: 50 w/count. The second ultraviolet lamp module and the third-stage ultraviolet lamp module are UV-LED ultraviolet light sources, the ultraviolet wavelength is 395nm, and the power is as follows: 10 w/group, this type UV-LED395nm ultraviolet lamp module is the customization product, has adopted high-power LED chip, directly encapsulates on metal substrate, makes the ultraviolet ray reach high accuracy, high intensity and shines, shines than traditional mercury lamp and has more optimized high intensity output and homogeneity. The electric power of the purifier is 360W.
The first-stage photocatalytic plate, the second-stage photocatalytic plate and the third-stage photocatalytic plate adopt graphene oxide-based nano titanium dioxide photocatalytic plates, are plate-shaped sections prepared by compounding graphene oxide base materials and nano titanium dioxide photocatalysts, and are respectively arranged in corresponding mounting chutes in the purifying box body.
The control system comprises an ECU control module and a liquid crystal display, wherein the ECU control module is connected with a power supply of the first-stage ultraviolet lamp module, the second-stage ultraviolet lamp module and the third-stage ultraviolet lamp module and a power supply of the exhaust fan through circuits to perform on-off control; the control panel is arranged on the front surface of the purifying box body, comprises a control button and a display and is connected with the ECU control module, and the purifier automatically operates in a low-power (1 gear) state and a full-power (2 gear) state by inputting a control signal through the control button or a remote controller; the timing operation is set through a control button or a remote controller (the timing setting is divided into 1 hour, 2 hours, 4 hours and 8 hours), the display adopts a liquid crystal display screen to display the operation state, and meanwhile, the control system can also automatically execute: power-off protection and overload protection.
The air inlet is a cylindrical through hole arranged in the center of the top of the purifying box body and is externally connected with an input pipeline (the diameter is 75 mm); the air outlet is arranged on the side wall of the bottom of the purifying box body and is provided with a plurality of rows of exhaust holes (the aperture is 5 mm). Waste gas is sucked through a top air inlet, sequentially passes through the first-stage filtering module, the first-stage ultraviolet lamp module and the first-stage photocatalytic plate, the second-stage ultraviolet lamp module and the second-stage photocatalytic plate, the third-stage ultraviolet lamp module and the third-stage photocatalytic plate, and finally purified gas is discharged through the air outlet.
The side of the purifying box body is provided with a box door capable of being opened and closed, and the box door is opened to carry out installation, module debugging and later maintenance of parts in the box body.
The bottom of the purifying box body is provided with a movable roller, so that the purifying box is convenient to move.
The purifier has the technical principle that: adsorption technology and photocatalytic oxidation technology. The premise is that on the basis that the particles in the waste gas are efficiently filtered, the efficient adsorption performance of the graphene oxide-based composite material on organic pollutants is firstly established, and butanone-type polluted gas components generated by volatilization are adsorbed and concentrated by the graphene oxide-based composite material. Secondly, the graphene oxide-based composite material has high transmittance and can effectively absorb ultraviolet rays, and the nano titanium dioxide photocatalyst in the photocatalytic plate composite material forms a photoelectric conversion effect and accelerates a chemical reaction under the irradiation of ultraviolet rays. Therefore, the ultraviolet lamp is used as a light source, and the graphene oxide-based composite material and the nano titanium dioxide photocatalyst are used as carriers, so that the degradation of the butyl ketone organic matters is completed. The purification process comprises the following steps: firstly adsorbing, and then carrying out photocatalytic oxidation.
The photocatalysis board is graphene oxide based nano titanium dioxide photocatalysis board, wherein graphene oxide is a novel carbon nano material with excellent electrical, optical and mechanical properties, and graphene oxide based composite material and nano TiO are prepared2The photocatalyst is compounded, so that the photocatalytic performance can be obviously improved.
1. Experimentally, it was found that, as shown in fig. 6, uv-vis absorption spectroscopy: the absorption boundary of the composite material is about 400nm and obviously deviates to a long wave region, the phenomenon can be attributed to the formation of Ti-C chemical bonds, and the fact that the addition of the graphene oxide widens TiO2The energy band improves the utilization efficiency of the light energy. The experimental finding is the basis for determining the ultraviolet wavelength of the UV-LED to be 395 nm.
2. Preparation molding
2.1 preparation of graphene oxide:
in a solvent, stripping graphite powder by an ultrasonic method to prepare graphene: dissolving 10g of graphite powder in 100ml of N-methyl pyrrolidone, ultrasonically stripping for 6h, filling the mixed solution for 45min (the rotating speed is 1000r/min), and taking the upper suspension; dissolving the graphene stripped by the precipitate into a certain amount of N-methyl pyrrolidone again, performing ultrasonic centrifugation for 10min for 45min (the rotating speed is 500r/min), taking the upper layer suspension, and performing centrifugation for 5min (the rotating speed is 30000r/min) again to obtain the remaining precipitate, namely the graphene oxide.
2.2 preparation of nano titanium dioxide:
a sol-hydrothermal method is adopted: two sets of mixed solutions were prepared (the first set was a mixed solution of 5ml n-butyl takotate and 5ml absolute ethanol; the second set was a mixed solution of 20ml absolute ethanol, 55ml deionized water and 1ml nitric acid). Gradually adding the first group of solution into the second group of solution, and continuously stirring for 1h to perform hydrolysis reaction; the mixed solution after the reaction was put into a 50ml reaction kettle at 160C0Is heated for 6 hours at the temperature of (1); taking out and cooling to room temperature, and then putting the obtained product at 60C0After 24h of drying at 450C0Calcining for 2h at the temperature.
2.3 preparation of the photocatalysis board, namely the graphene oxide based nanometer titanium dioxide photocatalysis board:
preparing TiO from graphene oxide and nano titanium dioxide in the initial ratio of 1:1 by a one-step sol mixing method2the/Go composite material.
With respect to TiO2The graphene oxide in the/Go composite material plays a role in degrading pollutants, and is summarized as follows: electrons on the graphene oxide sheet layer can form hydroxyl radicals (-OH) with extremely strong oxidizing capacity with adsorbed O. Experiments prove that: this TiO compound2the/Go composite material greatly enhances the adsorption effect on organic pollutants, and simultaneously has higher photocatalytic efficiency due to wider spectral absorption range and stronger separation capability of electron-hole pairs.
The test result shows that: the activity of the graphene oxide-based nano titanium dioxide composite material in photocatalytic degradation of pollutants is obviously superior to that of a pure semiconductor by 20%.
Waste gas purification process:
waste gas (butanone) of the ink-jet printer enters a first-stage filtering module through an external air pipe under the action of an exhaust fan through an air inlet to perform filtering treatment, so that particles in the waste gas are filtered; then the mixture enters a first-stage UVC band ultraviolet lamp and a first-stage photocatalytic plate, an ultraviolet catalytic oxidation reaction is firstly carried out, meanwhile, 185nm ultraviolet rays are used for puncturing air to generate ozone, the strong oxidizing property of the ozone generates an ozone synergistic oxidation effect on butanone, and the degradation reaction process from macromolecular organic matters to small-molecular organic matters is carried out; then, a catalytic oxidation process of the UVA waveband nano titanium dioxide is executed through a second-stage UV-LED395nm ultraviolet lamp and a second-stage photocatalytic plate respectively; and then the catalytic oxidation process of the nanometer titanium dioxide in the UVA waveband is repeatedly executed through a third-stage UV-LED395nm ultraviolet lamp and a third-stage photocatalytic plate. Theoretically, ultraviolet rays larger than 280nm have a good absorption function on ozone, so that the ultraviolet rays of the UV-LED395nm can well absorb residual ozone generated in the preceding stage reaction along with the photocatalytic oxidation process, thereby ensuring that the concentration of the residual ozone generated after the reaction of the ozone and butanone is reduced to be within the control standard. The final products of butanone organic matters after multistage photocatalytic degradation are carbon dioxide and water which are discharged from an air outlet. The whole purification process is controlled by an ECU control module, and the input mode is controlled as follows: control buttons and a remote controller are arranged on the control panel.
The technical core of the graphene oxide-based photocatalytic oxidation inkjet printer waste gas purifier is as follows: the adsorption performance of the adsorption technology and the photocatalysis technology at normal temperature is 3.7 times better than that of activated carbon, and simultaneously, the fuel consumed by the waste gas heating treatment process can be saved due to the catalytic oxidation at the normal temperature. Therefore, the graphene oxide-based photocatalytic oxidation inkjet printer waste gas purifier meets the environmental protection requirements of safety, energy conservation and emission reduction.
Drawings
FIG. 1 is a schematic view of a purification box; FIG. 2 is a cross-sectional view of a purification tank;
FIG. 3 is a schematic view of the UV lamp module; FIG. 4 is a schematic structural diagram of a first stage filtration module;
FIG. 5 is a schematic diagram of the electrical configuration of the control system; FIG. 6 is a graph of UV-VIS absorption spectrum analysis.
Detailed Description
The invention will be further described with reference to the following specific embodiments and the accompanying drawings. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting of the invention.
Example (b): graphite oxide base ink jet numbering machine exhaust gas purifier including purifying box 13 and control system. The purifying box 13 is a hollow box structure, as shown in fig. 1, the top end of the purifying box 13 is provided with an air inlet 1, the bottom side wall of the purifying box 13 is provided with an air outlet 11, the air inlet 1 is a cylindrical through hole arranged at the center of the top of the purifying box 13, and the air outlet 11 is a plurality of exhaust holes arranged on the bottom side wall of the purifying box 13. The side of the purifying box body 13 is also provided with a box door 15 which can be opened and closed, and the inside of the box body is installed or the components are replaced after the box body is opened. The bottom of the purifying box body 13 is provided with a movable pulley 16 which is convenient to move.
As shown in fig. 2, an exhaust fan 2 is installed in the purification box body 13 near the air inlet 1, the tail of the exhaust fan 2 is connected with a wind scooper 3, the wind scooper 3 is welded and fixed with the inner wall of the purification box body 13, and the exhaust fan 2 is a low-noise oblique flow booster fan. Seven installation chutes 14 are arranged on the inner wall of the purification box body 13 positioned at the lower end of the air guide cover 3 from top to bottom, and a first-stage filter module 4, a first-stage ultraviolet lamp module 5, a first-stage photocatalytic plate 6, a second-stage ultraviolet lamp module 7, a second-stage photocatalytic plate 8, a third-stage ultraviolet lamp module 9 and a third-stage photocatalytic plate 10 are sequentially installed. The first-stage photocatalytic plate, the second-stage photocatalytic plate and the third-stage photocatalytic plate are all plate-shaped sectional materials prepared by compounding graphene oxide and nano titanium dioxide photocatalyst.
As shown in fig. 3, each of the first-stage uv lamp module 5, the second-stage uv lamp module 7, and the third-stage uv lamp module 9 is composed of a plurality of uv lamps 19 and a lamp holder 20 for mounting the lamps, the lamp holder 20 is provided with a lamp holder and connecting wires, the uv lamps 19 are mounted on the lamp holder, the lamp holder 20 is mounted in a mounting chute of the purification box 13, and wiring holes 21 are provided at corresponding positions in the purification box 13 for connecting circuit wiring. The ultraviolet lamp of the first-stage ultraviolet lamp module 5 is a C-band ultraviolet lamp, and the wavelength of the ultraviolet light is 185nm +254nm composite wavelength ultraviolet lamp; the ultraviolet lamps of the second ultraviolet lamp module and the third ultraviolet lamp module are UV-LED395 ultraviolet lamps, and the wavelength of the ultraviolet light is 395 nm.
As shown in fig. 4, the first stage filtering module 4 is a plate structure formed by stacking medical-grade non-woven fabric 41 on a nickel-based filtering net 42. The first-stage filtering module 4, the first-stage ultraviolet lamp module 5, the second-stage ultraviolet lamp module 7, the third-stage ultraviolet lamp module 9, the first-stage photocatalytic plate 6, the second-stage photocatalytic plate 8 and the third-stage photocatalytic plate 10 are respectively arranged in the installation chute 14 in the purifying box body 13 from top to bottom. The first-stage filter module 4, the first-stage ultraviolet lamp module 5, the first-stage photocatalytic plate 6, the second-stage ultraviolet lamp module 7, the second-stage photocatalytic plate 8, and the third-stage ultraviolet lamp module 9 and the third-stage photocatalytic plate 10 are arranged at appropriate intervals on the premise of ensuring the ultraviolet radiation intensity.
As shown in fig. 5, the control system includes a power supply, an ECU control module, a control panel and a remote controller, the ECU control module is connected to the power supply circuits of the ultraviolet lamps of the first stage ultraviolet lamp module 5, the second stage ultraviolet lamp module 7 and the third stage ultraviolet lamp module 9 and the exhaust fan 2 through circuits, and the rectifier 22 of the ultraviolet lamps is arranged at a proper position on the inner wall of the box body. The control panel is arranged on the outer surface of the purifying box body 13 and comprises a control button 18 and a liquid crystal display 17 which are connected with the ECU control module, control signals are input through the control button, the ECU control module executes the on-off control of the ultraviolet lamp and the exhaust fan, and simultaneously displays the running state through the liquid crystal display and automatically executes power-off protection and overload protection. The remote controller is in communication connection with a radio frequency circuit connected with the ECU control module through radio frequency signals, and the ECU control module receives control signals sent by the remote controller and executes corresponding circuit switch control to realize the remote control operation function.
Waste gas (butanone) of the code spraying machine passes through an external air pipe, enters a first-stage filtering module 4 through an air inlet 1 under the action of an exhaust fan to perform filtering treatment, and particulate matters in the waste gas are filtered; then enters a first-stage ultraviolet lamp module 5 and a first-stage photocatalytic plate 6, and firstly, a catalytic oxidation process under deep ultraviolet light is performed; then, a UVA waveband nano titanium dioxide catalytic oxidation process is executed through a second-stage ultraviolet lamp module 7 and a second-stage photocatalytic plate 8 respectively; repeatedly performing a UVA waveband nano titanium dioxide catalytic oxidation process once after passing through a third-stage ultraviolet lamp module 9 and a third-stage photocatalytic plate 10; and finally, the purified gas is discharged through the air outlet 11. The whole purification process is controlled by the ECU control module, and the control mode can be completed by a control button on a control panel or a remote controller.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, it is intended that all equivalent modifications or changes which may be accomplished by those skilled in the art without departing from the spirit and technical concepts of the present invention shall be covered by the claims of the present invention.
Claims (8)
1. The graphene oxide-based photocatalytic oxidation inkjet printer waste gas purifier is characterized by comprising a purifying box body (13) and a control system, wherein the purifying box body (13) is of a hollow box body structure, the top end of the purifying box body (13) is provided with an air inlet (1), and the bottom of the purifying box body (13) is provided with an air outlet (11); an exhaust fan (2), an air guide cover (3), a first-stage filtering module (4), a first-stage ultraviolet lamp module (5), a first-stage photocatalytic plate (6), a second-stage ultraviolet lamp module (7), a second-stage photocatalytic plate (8), a third-stage ultraviolet lamp module (9) and a third-stage photocatalytic plate (10) are sequentially arranged in the purifying box body (13) from top to bottom; the inner wall of the purification box body (13) is provided with a plurality of mounting chutes (14) from top to bottom, and a first-stage filtering module (4), a first-stage ultraviolet lamp module (5), a first-stage photocatalytic plate (6), a second-stage ultraviolet lamp module (7), a second-stage photocatalytic plate (8), a third-stage ultraviolet lamp module (9) and a third-stage photocatalytic plate (10) are sequentially mounted; the exhaust fan (2) is connected with the air guide cover (3) through a metal hoop, and the air guide cover (3) is welded and fixed with the inner wall of the purification box body (13).
2. The graphene oxide-based photocatalytic oxidation code spraying machine waste gas purifier as claimed in claim 1, wherein the first-stage filtering module (4) is a plate-and-frame structure formed by superposing medical-grade non-woven fabrics (41) on a nickel-based filtering net (42).
3. The graphene oxide-based photocatalytic oxidation inkjet printer exhaust gas purifier according to claim 1, wherein the first-stage ultraviolet lamp module (5), the second-stage ultraviolet lamp module (7) and the third-stage ultraviolet lamp module (9) are all composed of ultraviolet lamps (19) and metal lamp holders (20) for mounting lamps, lamp holders are arranged on the lamp holders (20) and connecting wires are arranged, the ultraviolet lamps (19) are mounted on the lamp holders, and the lamp holders (20) are mounted in mounting sliding grooves of the purifying box body (13); the ultraviolet lamp in the first-stage ultraviolet lamp module (5) is a C-band ultraviolet lamp; the second and third ultraviolet lamp modules are UV-LED ultraviolet light source modules, and the ultraviolet wavelength is 395 nm.
4. The graphene oxide-based photocatalytic oxidation inkjet printer exhaust gas purifier according to claim 1, wherein the first-stage photocatalytic plate (6), the second-stage photocatalytic plate (8) and the third-stage photocatalytic plate (10) are plate-shaped profiles made of graphene oxide base materials and nano titanium dioxide photocatalysts and are respectively placed in corresponding mounting chutes (14) in the purifying box body (13).
5. The graphene oxide-based photocatalytic oxidation inkjet printer exhaust gas purifier according to claim 1, wherein the control system comprises an ECU control module and a liquid crystal display, and the ECU control module is connected with an ultraviolet lamp power supply of a first-stage ultraviolet lamp module (5), a second-stage ultraviolet lamp module (7) and a third-stage ultraviolet lamp module (9) and a power supply of an exhaust fan (2) through circuits to perform on-off control; the control panel is arranged on the outer surface of the purifying box body (13), is connected with the ECU control module through a control button (18) and a display (17), inputs a control signal through the control button, displays the running state through the display, and automatically executes power-off protection and overload protection.
6. The graphene oxide-based photocatalytic oxidation inkjet printer waste gas purifier as claimed in claim 1, wherein the air inlet (1) is a cylindrical through hole arranged in the center of the top of the purifying box body (13); the air outlet (11) is arranged on the side wall of the bottom of the purifying box body (13) and is provided with a plurality of exhaust holes.
7. The graphene oxide-based photocatalytic oxidation inkjet printer exhaust gas purifier according to claim 1, wherein a door (15) capable of being opened and closed is arranged on the side surface of the purifying box body (13).
8. The graphene oxide-based photocatalytic oxidation inkjet printer exhaust gas purifier according to claim 1, wherein the bottom of the purifying box body (13) is provided with a moving roller (16).
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