CN218372019U - Sewage treatment plant based on microchannel coupling photocatalytic reaction - Google Patents
Sewage treatment plant based on microchannel coupling photocatalytic reaction Download PDFInfo
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- CN218372019U CN218372019U CN202222468284.XU CN202222468284U CN218372019U CN 218372019 U CN218372019 U CN 218372019U CN 202222468284 U CN202222468284 U CN 202222468284U CN 218372019 U CN218372019 U CN 218372019U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The utility model discloses a sewage treatment device based on microchannel coupling photocatalytic reaction, which belongs to the technical field of sewage treatment, and the utility model discloses a through setting up including oxidant conveying system, sewage conveying system, microchannel coupling photocatalytic reactor and sewage treatment product receiving system, make the whole device utilize technical advantages such as microchannel reactor, photocatalysis and ultrasonic cavitation in coordination, can make sewage and oxidant obtain great contact reaction specific surface area, the heat mass transfer between the material is more abundant, the photocatalytic reaction can guarantee that the organic matter in the sewage obtains effective degradation; meanwhile, an ultrasonic generating device is arranged in the microchannel coupling photocatalytic reactor, so that the technical problem that the pretreated sewage is easy to cause channel blockage when entering the microchannel reactor for a long time.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, a sewage treatment plant based on microchannel coupling photocatalytic reaction is related to.
Background
The photocatalysis principle is based on the oxidation-reduction capability of the photocatalyst under the condition of illumination, so that the aims of purifying pollutants, synthesizing and converting substances and the like are fulfilled. The photocatalysis technology is a novel, efficient and safe environment-friendly pollutant treatment technology, and particularly has wide attention and application in the aspect of wastewater treatment. However, the existing photocatalytic technology is limited by weak catalytic efficiency and generation of other harmful byproducts caused by the problems of insufficient specific surface area, difficult control of reaction, catalyst loading mode and the like, and the development and application of the photocatalytic technology are limited to a certain extent.
The microchannel reactor is a three-dimensional structural element with the characteristic dimension of 10-1000 mu m, which is manufactured by using a precision machining technology, and can be used for a highly integrated micro-reaction system with various functions such as chemical reaction, heat exchange, mixing, separation, analysis, control and the like. The microchannel reactor is used as a core component of a microsystem, the miniaturization of the characteristic dimension of an internal channel of the microchannel reactor causes the microchannel reactor to show the unique advantages of high specific surface area, high efficiency of fluid mixing, high heat and mass transfer rate, high intrinsic safety, low process energy consumption, high integration level, small amplification effect, strong controllability and the like which are not possessed by the traditional reactor (such as a flask, a reaction kettle and the like), and the chemical process is enhanced by changing the heat transfer, mass transfer and flow characteristics of fluid, so that the microchannel reactor is widely applied to laboratory separation preparation and process industry, and meanwhile, the microchannel reactor has certain application in the aspect of wastewater treatment, but still has some defects: 1) Heavy metal ions in the sewage can be effectively removed by utilizing a chemical reaction, but Chemical Oxygen Demand (COD) in the sewage cannot be effectively degraded, and the condition of discharge or recycling cannot be met; 2) Even if the pretreated sewage enters the microchannel reactor and stays for a long time, the channel is easy to be blocked, and the continuous startup use of the device is influenced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a sewage treatment device based on microchannel coupling photocatalytic reaction, which is used for effectively degrading Chemical Oxygen Demand (COD) in sewage in one of the technical problems to be solved and easily causing channel blockage due to long-time stop of pretreated sewage entering a microchannel reactor.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
the utility model discloses a sewage treatment device based on microchannel coupling photocatalytic reaction, which comprises an oxidant conveying system, a sewage conveying system, a microchannel coupling photocatalytic reactor and a sewage treatment product receiving system; the microchannel coupling photocatalytic reactor comprises an upper microchannel reaction plate, a lower microchannel reaction plate, an ultraviolet lamp and an ultrasonic generator; the upper-layer microchannel reaction plate is fixedly arranged at the upper part of the lower-layer microchannel reaction plate, the ultraviolet lamp is fixedly arranged above the upper-layer microchannel reaction plate, and the ultrasonic wave generating device is fixedly arranged at the lower part of the lower-layer microchannel reaction plate; the oxidant conveying system and the sewage conveying system are respectively connected with the inlet of the upper-layer micro-channel reaction plate, and the sewage treatment product receiving system is connected with the outlet of the lower-layer micro-channel reaction plate.
Further, sewage conveying system includes sewage memory device, leading preprocessing device of sewage and sewage conveying device, sewage memory device passes through pipeline and leading preprocessing device's of sewage entry linkage, leading preprocessing device of sewage's export passes through pipeline and sewage conveying device's entry linkage, sewage conveying device's export and the entrance of upper microchannel reaction plate are connected.
Furthermore, the oxidant conveying system comprises an oxidant buffer device, an oxidant pre-treatment device and an oxidant conveying device, wherein the oxidant buffer device is connected with an inlet of the oxidant pre-treatment device through a pipeline, an outlet of the oxidant pre-treatment device is connected with an inlet of the oxidant conveying device through a pipeline, and an outlet of the oxidant conveying device is connected with an inlet of the upper-layer microchannel reaction plate.
Furthermore, the oxidant conveying device and the sewage conveying device are plunger type metering pumps.
Further, the sewage treatment product receiving system comprises a product receiving device and an online analysis and detection device, wherein an inlet of the product receiving device is connected with an outlet of the lower-layer microchannel reaction plate through a pipeline, and the product receiving device is also connected with the online analysis and detection device.
Furthermore, the microchannel coupling photocatalytic reactor also comprises a buckle cover and a heating temperature measuring device, wherein the buckle cover is buckled on the upper microchannel reaction plate, and the ultraviolet lamp is fixedly arranged on the inner wall of the buckle cover; the heating temperature measuring device is embedded in the lower-layer microchannel reaction plate.
Further, the buckle cover is made of transparent acrylic materials.
Furthermore, the heating temperature measuring device is a digital display electric heating temperature measuring combined instrument.
Furthermore, the upper layer micro-channel reaction plate and the lower layer micro-channel reaction plate are both provided with a micro-reaction structure, the micro-reaction structure is a spiral or snake-shaped bent channel with the characteristic dimension of 0.5-1 mm, and the inlet of the upper layer micro-channel reaction plate and the outlet of the lower layer micro-channel reaction plate are communicated with each other through the micro-reaction structure.
Furthermore, the upper layer microchannel reaction plate is made of transparent glass, and the lower layer microchannel reaction plate is made of pure titanium.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a sewage treatment device based on microchannel coupling photocatalytic reaction, which comprises an oxidant conveying system, a sewage conveying system, a microchannel coupling photocatalytic reactor and a sewage treatment product receiving system, so that the whole device can cooperatively utilize the technical advantages of the microchannel reactor, photocatalysis, ultrasonic cavitation and the like, can ensure that sewage and oxidant obtain larger contact reaction specific surface area, the heat mass transfer between materials is more sufficient, and the photocatalytic reaction can ensure that organic matters in the sewage are effectively degraded; meanwhile, the ultrasonic wave generating device is arranged in the microchannel coupling photocatalytic reactor, so that the full mixing contact of the sewage and the oxidant in the microchannel structure can be effectively enhanced, the turbulent flow state of the fluid is enhanced, the flow characteristic is enhanced, the attachment of dirt on the wall surface is effectively inhibited, and the technical problem that the channel is easily blocked when the pretreated sewage enters the microchannel reactor and stays for a long time is solved.
Furthermore, the adopted oxidant conveying device and the adopted sewage conveying device are plunger type metering pumps, the pumps are accurate in feeding, convenient in flow regulation, wide in pressure and flow range and strong in corrosion resistance, accurate in feeding and accurate in reactant matching can be achieved under the action of the stainless steel plunger type metering pump, the reaction is continuous and controllable, the process energy consumption is low, the integration level is high, and the chemical reaction application range is wide.
Furthermore, the buckle cover is made of transparent acrylic materials, so that the sewage treatment process of the photocatalytic coupling technology in the microchannel can be conveniently and visually observed; the upper microchannel reaction plate is made of transparent glass, and the good light transmittance of the glass is convenient for ultraviolet light to penetrate through the retention sewage applied to the microchannel.
Furthermore, a heating temperature measuring device is arranged in the micro-channel coupling photocatalytic reactor, and the heating temperature measuring device is a digital display electric heating temperature measuring combined instrument, can digitally display the current working temperature and working time, and is convenient to operate; the on-line analysis and detection device is arranged in the sewage treatment product receiving system, so that the on-line analysis and detection of the product can be comprehensively realized, and the intelligent, integrated and efficient treatment capacity of sewage is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of a sewage treatment plant based on a microchannel coupling photocatalytic reaction of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the microchannel coupling photocatalytic reactor of the present invention;
wherein: 1-a sewage buffer device; 2-an oxidant buffer device; 3-pre-treatment device of oxidant; 4-a sewage pre-treatment device; 5-an oxidant delivery device; 6-a sewage conveying device; 7-a microchannel coupling photocatalytic reactor; 701-buckling a cover; 702-ultraviolet light; 703-upper microchannel reaction plate; 704-heating temperature measuring device; 705-an ultrasonic wave generating device; 706-lower microchannel reaction plate; 8-a product receiving device; 9-online analysis and detection device.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present invention will be described in further detail with reference to the accompanying drawings:
as shown in fig. 1 and fig. 2, the utility model discloses a sewage treatment device based on microchannel coupling photocatalytic reaction, which comprises an oxidant delivery system, a sewage delivery system, a microchannel coupling photocatalytic reactor 7 and a sewage treatment product receiving system; the oxidant conveying system comprises an oxidant buffer device 2, an oxidant pre-pretreatment device 3 and an oxidant conveying device 5; the sewage conveying system comprises a sewage caching device 1, a sewage pre-treatment device 4 and a sewage conveying device 6; the microchannel coupling photocatalytic reactor 7 comprises a buckle cover 701, an ultraviolet lamp 702, an upper microchannel reaction plate 703, a heating and temperature measuring device 704, an ultrasonic generating device 705 and a lower microchannel reaction plate 706; the sewage conveying system comprises a product receiving device 8 and an online analysis and detection device 9; the upper-layer microchannel reaction plate 703 is arranged at the upper part of the lower-layer microchannel reaction plate 706 and is fastened and connected in a bolt-gasket-nut mode, so that the microchannel reactor is convenient to disassemble and overhaul; the ultrasonic wave generating device 705 is fixedly arranged at the lower part of the lower-layer microchannel reaction plate 706, the buckle cover 701 is arranged on the upper-layer microchannel reaction plate 703, and the ultraviolet lamp 702 is fixedly arranged on the inner wall of the buckle cover 701; the heating temperature measuring device 704 is embedded in the lower-layer micro-channel reaction plate 706.
Buffer substances in the sewage buffer device 1 and the oxidant buffer device 2 respectively flow through the low-position sewage pre-treatment device 4 and the oxidant pre-treatment device 3 through pipelines from high positions through the action of gravity, outlets of the sewage pre-treatment device 4 and the oxidant pre-treatment device 3 are respectively connected with inlets of the sewage conveying device 6 and the oxidant conveying device 5, and outlets of the sewage conveying device 6 and the oxidant conveying device 5 are respectively connected with an interface of the upper-layer microchannel reaction plate 703; the inlet comprising the product receiving device 8 is connected with the outlet of the lower microchannel reaction plate 706 through a pipeline, and the product receiving device 8 is also connected with an online analysis and detection device 9.
An ultraviolet lamp 702, a heating temperature measuring device 704 and an ultrasonic generating device 705 are sequentially turned on, and after the sewage and the oxidant generate the photocatalytic reaction in the microchannel, the product flows into a product receiving device 8 from the outlet of a lower microchannel reaction plate 706 through a pipeline and is sampled and detected by an online analysis and detection device 9.
The oxidant conveying device 5 and the sewage conveying device 6 are plunger type metering pumps, and the pumps are accurate in feeding, convenient to adjust flow, wide in pressure and flow range and strong in corrosion resistance; the micro-reaction structures on the upper micro-channel reaction plate 703 and the lower micro-channel reaction plate 706 are spiral or serpentine curved channels, and the characteristic dimension is 0.5-1 mm; the buckle cover 701 is made of transparent acrylic materials, so that the sewage treatment process of the photocatalytic coupling technology in the microchannel can be conveniently and visually observed, the upper-layer microchannel reaction plate 703 is made of transparent glass materials, the microchannel structure is processed by laser etching, and the good light transmittance of the glass materials is convenient for ultraviolet light to penetrate through standing sewage acting on the microchannel; the lower-layer microchannel reaction plate 706 is made of pure titanium TA2, the micro-reaction structure is prepared by adopting a precision processing technology, and a layer of high-density TiO with ordered structure height is prepared on the surface of the pure titanium microstructure by adopting an electrochemical anodic oxidation method after the micro-reaction structure is processed 2 The nanotube array is used as a catalyst of a photocatalytic reaction.
The heating temperature measuring device 704 is a digital display electric heating temperature measuring combined instrument, the heating temperature is controlled below 80 ℃, and the current working temperature and working time can be displayed in a digital mode; the ultrasonic wave generating device 705 can effectively enhance the sufficient mixing and contact of the sewage and the oxidant in the microchannel structure, enhance the turbulent flow state of the fluid, strengthen the flow characteristic and effectively inhibit the attachment of dirt on the wall surface.
Example 1
Selecting bleaching waste water of a certain paper mill as sewage feed liquid, wherein the COD content in the bleaching waste water is 909.7mg/L, the raw water is black brown, and the selected bleaching waste waterThe oxidant is sodium hypochlorite. Firstly, bleaching waste water and sodium hypochlorite solution are respectively placed in a high-level sewage caching device 1 and an oxidant caching device 2, the bleaching waste water and the sodium hypochlorite solution flow to a sewage pre-pretreatment device 4 and an oxidant pre-pretreatment device 3 under the action of gravity after a valve is opened, the main function of the step is to remove large solid particles, impurities, grease and the like in the waste water and the oxidant so as to avoid the risk of blocking subsequent pump bodies, micro channels, pipelines and the like, a stainless steel plunger metering pump is opened, two kinds of feed liquid are pumped into a micro channel reactor at the same time at the flow rate of 5mL/min, an ultraviolet lamp 702, a digital display electric heating thermometer and an ultrasonic generating device 705 are simultaneously opened, the irradiation intensity of the glass surface is not lower than 180uw/cm 2 The electric heating temperature is set to be 60 ℃, the ultrasonic frequency is 20KHz, the ultrasonic power is 120W, two feed liquids are fully mixed in the micro-channel coupling photocatalytic reactor 7, the reaction is started under photocatalysis, the feed liquid enters a sewage treatment product receiving system after the feed liquid is discharged out of the micro-channel coupling photocatalytic reactor 7, the product is subjected to online analysis and detection, the COD content in the water is reduced to 52.6mg/L, and the COD degradation rate reaches 94.2%.
The material mixing time, i.e. the residence time in the microchannel coupling photocatalytic reactor 7, can be controlled by the feeding flow of the plunger metering pump, the larger the flow, the faster the flow speed, the shorter the mixing time, and the shorter the residence time of the material liquid.
Example 2: the COD content in the wastewater of a certain pesticide production enterprise is up to 15000mg/L, the raw water is purple black, and the selected oxidant is sodium hypochlorite. Firstly, pesticide wastewater and a sodium hypochlorite solution are respectively placed in a high-level sewage caching device 1 and an oxidant caching device 2, flow to a sewage pre-pretreatment device 4 and an oxidant pre-pretreatment device 3 under the action of gravity after a valve is opened, the main functions of the steps are to remove solid large-particle impurities and the like in the pesticide wastewater and the oxidant and reduce the subsequent treatment difficulty, two feed liquids are simultaneously pumped into a microchannel coupling photocatalytic reactor 7 at the flow rate of 20mL/min, an ultraviolet lamp 702, a digital display electric heating thermometer and an ultrasonic wave generating device 705 are simultaneously started, and the irradiation intensity of the glass surface is not lower than 180uw/cm 2 Setting of electric heating temperatureThe temperature is 80 ℃, the ultrasonic frequency is 30KHz, the ultrasonic power is 150W, the two feed liquids are fully mixed in the microchannel reactor, the reaction is started under photocatalysis until the feed liquids are discharged out of the microchannel reactor, the feed liquids enter a sewage treatment product receiving system, the products are subjected to online analysis and detection, the COD content in the water is reduced to 950mg/L, and the COD degradation rate reaches 93.6%.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (10)
1. A sewage treatment device based on micro-channel coupling photocatalytic reaction is characterized by comprising an oxidant conveying system, a sewage conveying system, a micro-channel coupling photocatalytic reactor (7) and a sewage treatment product receiving system; the microchannel coupling photocatalytic reactor (7) comprises an upper microchannel reaction plate (703), a lower microchannel reaction plate (706), an ultraviolet lamp (702) and an ultrasonic generating device (705); the upper-layer microchannel reaction plate (703) is fixedly arranged at the upper part of the lower-layer microchannel reaction plate (706), the ultraviolet lamp (702) is fixedly arranged above the upper-layer microchannel reaction plate (703), and the ultrasonic wave generating device (705) is fixedly arranged at the lower part of the lower-layer microchannel reaction plate (706); the oxidant conveying system and the sewage conveying system are respectively connected with an inlet of the upper-layer micro-channel reaction plate (703), and the sewage treatment product receiving system is connected with an outlet of the lower-layer micro-channel reaction plate (706).
2. The sewage treatment device based on the microchannel coupling photocatalytic reaction is characterized in that the sewage conveying system comprises a sewage caching device (1), a sewage pre-treatment device (4) and a sewage conveying device (6), wherein the sewage caching device (1) is connected with an inlet of the sewage pre-treatment device (4) through a pipeline, an outlet of the sewage pre-treatment device (4) is connected with an inlet of the sewage conveying device (6) through a pipeline, and an outlet of the sewage conveying device (6) is connected with an inlet of the upper microchannel reaction plate (703).
3. The sewage treatment device based on the microchannel coupling photocatalytic reaction is characterized in that the oxidant conveying system comprises an oxidant buffering device (2), an oxidant pre-treatment device (3) and an oxidant conveying device (5), wherein the oxidant buffering device (2) is connected with an inlet of the oxidant pre-treatment device (3) through a pipeline, an outlet of the oxidant pre-treatment device (3) is connected with an inlet of the oxidant conveying device (5) through a pipeline, and an outlet of the oxidant conveying device (5) is connected with an inlet of an upper microchannel reaction plate (703).
4. The sewage treatment device based on the micro-channel coupling photocatalytic reaction is characterized in that the oxidant delivery device (5) and the sewage delivery device (6) are plunger type metering pumps.
5. The sewage treatment device based on the microchannel coupling photocatalytic reaction is characterized in that the sewage treatment product receiving system comprises a product receiving device (8) and an online analysis and detection device (9), the inlet comprising the product receiving device (8) is connected with the outlet of the lower microchannel reaction plate (706) through a pipeline, and the product receiving device (8) is also connected with the online analysis and detection device (9).
6. The sewage treatment device based on the microchannel coupling photocatalytic reaction as recited in claim 1, wherein the microchannel coupling photocatalytic reactor (7) further comprises a cover (701) and a heating temperature measuring device (704), the cover (701) is covered on the upper microchannel reaction plate (703), and the ultraviolet lamp (702) is fixedly arranged on the inner wall of the cover (701); the heating temperature measuring device (704) is embedded in the lower-layer micro-channel reaction plate (706).
7. The sewage treatment device based on the micro-channel coupling photocatalytic reaction according to claim 6, wherein the buckle cover (701) is made of transparent acrylic material.
8. The sewage treatment device based on the micro-channel coupling photocatalytic reaction of claim 6, wherein the heating temperature measuring device (704) is a digital display electric heating temperature measuring combined instrument.
9. The sewage treatment device based on the microchannel coupling photocatalytic reaction as recited in claim 1, wherein the upper microchannel reaction plate (703) and the lower microchannel reaction plate (706) are both provided with a micro reaction structure, the micro reaction structure is a spiral or serpentine curved channel with a characteristic dimension of 0.5-1 mm, and an inlet of the upper microchannel reaction plate (703) and an outlet of the lower microchannel reaction plate (706) are communicated with each other through the micro reaction structure.
10. The sewage treatment device based on the microchannel coupling photocatalytic reaction as recited in claim 9, wherein the material of the upper microchannel reaction plate (703) is transparent glass, and the material of the lower microchannel reaction plate (706) is pure titanium.
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| CN202222468284.XU CN218372019U (en) | 2022-09-16 | 2022-09-16 | Sewage treatment plant based on microchannel coupling photocatalytic reaction |
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| CN202222468284.XU CN218372019U (en) | 2022-09-16 | 2022-09-16 | Sewage treatment plant based on microchannel coupling photocatalytic reaction |
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