CN102745850B - Method for maintaining internal key components of microwave photocatalytic wastewater-degrading processing device - Google Patents
Method for maintaining internal key components of microwave photocatalytic wastewater-degrading processing device Download PDFInfo
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- CN102745850B CN102745850B CN201210234814.2A CN201210234814A CN102745850B CN 102745850 B CN102745850 B CN 102745850B CN 201210234814 A CN201210234814 A CN 201210234814A CN 102745850 B CN102745850 B CN 102745850B
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Abstract
The invention relates to a method for maintaining internal key components of a microwave photocatalytic wastewater-degrading processing device, which belongs to the technical field of wastewater processing. In an existing microwave photocatalytic wastewater-degrading technology, the thermal-etching destruction problem of an organic-matter membrane-separating assembly and the scaling problem of the outer side of a quartz tube for shielding an electrodeless ultraviolet lamp exist, and the scheme aims to totally solve the problems. The method disclosed by the scheme comprises the following steps of wrapping and hiding the membrane-separating assembly in a metallic box-cage-shaped microwave shielding cover; installing an ultrasonic transducer inside or on an outer surface of a microwave photocatalytic reactor; and starting a related power supply. The functions and the operation of the membrane-separating assembly are not obstructed by the microwave isolating method related by the scheme; and the instant cleaning of deposited scale on the premises that disassembly and shutdown are avoided is achieved by the method disclosed by the scheme through high-frequency ultrasonic waves. The instant maintaining problems of the two key components in a microwave photocatalytic device are totally solved by the method disclosed by the scheme.
Description
Technical field
The present invention relates to the inner key member maintaining method of a kind of microwave and photo catalysis wastewater degradation processing unit, belong to C02F technical field of waste water processing.
Background technology
Microwave and photo catalysis degradation treatment technology, as a kind of, effectively for the innoxious process for treating containing organic pollution industrial wastewater, development in recent years is swift and violent.
About microwave and photo catalysis degradation technique, as an example, the Chinese patent application case that can be CN102260003A referring to publication number.
The disclosure number is the Chinese patent application case of CN102260003A, using microwave as excitaton source, excite electrodeless ultraviolet lamp transmitting ultraviolet ray, irradiate the suspension-turbid liquid that is mixed with photochemical catalyst titanium dioxide in liquid internal, this electrodeless ultraviolet lamp is shrouded and is protecting by quartz ampoule, there is air pump to continue to inject air to this quartz ampoule inner chamber, the air being overflowed by quartz cavity is via pipeline and the micro porous aeration head UNICOM that is positioned at reactor bottom, the lower zone of this inside reactor is aeration zone, the upper area of this inside reactor is microwave and photo catalysis reaction zone, this scheme is also with the built-in membrane separation assemblies of reactor, carry the water of analysing after purification, and realize holding back again of photochemical catalyst titanium dioxide fine particles with this membrane separation assemblies and use, this scheme is also set up dividing plate between non-polar ultraviolet light source and membrane separation assemblies, for preventing the radiation damage of ultraviolet ray to organic membrane separation assemblies, pass into the air of inside reactor, part is participated in the photocatalytic degradation reaction that relies on photochemical catalyst titanium dioxide directly, some air, under the direct irradiation of ultraviolet light, generate a certain amount of ozone, the ozone of this generation is also being brought into play the direct oxidative degradation for organic pollution certainly.
The disclosure number is that the Chinese patent application case of CN102260003A has certainly played very important impetus for the progress of microwave and photo catalysis wastewater degradation technology, and the work that its research staff launches in this field is admirable.
Accept the described industrial wastewater of microwave and photo catalysis degradation treatment, wherein be mingled with unavoidably the material of some metal particles that originate from mechanical system abrasion process and carbon granules and so on, even if quantity is small, its existence is almost difficult to avoid, described organic membrane separation assemblies in the Chinese patent application case that the disclosure number is CN102260003A is installed in microwave and photo catalysis reaction zone, being installed in wherein do not stop microwave certainly for intercepting ultraviolet dividing plate between quartz ampoule and membrane separation assemblies, so, the practical function region of microwave must cover region that organic membrane separation assemblies is installed described in this scheme, based on the working mechanism of membrane separation assemblies, its accumulation process on the organic top layer of membrane separation assemblies of the particulate of metal particle as above and carbon granules and so on is difficult to avoid, and the particulate of metal particle and carbon granules and so on described in this type of, the good absorption medium of microwave energy exactly, absorb the particulate of the described metal particle of accumulation state of microwave energy and carbon granules and so on, the top layer of the organic membrane separation assemblies that can be close to it of nature produce based on heat penetration erosion mechanism continue pierce destruction, as mentioned above, due to the structures shape of this its device of CN102260003A application case can only select polyvinylidene fluoride film material, approximately 140 degrees Celsius of this polyvinylidene fluoride film material heatproofs, really high more many than general film material heatproof, but, the heat penetration erosion effect that its point-like of particulate that has absorbed the described metal particle of accumulation state of microwave energy and carbon granules and so on is pierced formula very easily breaks through the heatproof temperature limit of this polyvinylidene fluoride film material, for above-mentioned reasons, well imagine, pvdf membrane material in its device of this CN102260003A application case will be significantly less than expected desirable useful life its actual life, the structure of this its device of CN102260003A application case, determine under this structural framing, the heat penetration erosion destruction problem that above-mentioned point-like is pierced formula cannot be avoided.
On the other hand, be in the expressed apparatus structure of the Chinese patent application case of CN102260003A in the disclosure number, for shielding the quartz ampoule that protects electrodeless ultraviolet lamp, its outer wall, refers to the outer wall of quartz ampoule, through for a long time with the contacting of processed industrial wastewater, incrustation gradually unavoidably, the long-pending material of dirt is to be mainly difficult for by the mineral-type impurity that light-catalyzed reaction touched certainly, because of the incrustation phenomenon that this mechanism forms, after equipment long-play, is easy to be observed; Be attached to the dirty lamination of described quartz ampoule outer wall, although be very thin one deck, be also enough to the ultraviolet radiation of electrodeless ultraviolet lamp to cause significantly and stop, this significantly reduces the actual treatment effect that causes this microwave and photo catalysis reaction treating device; In the use procedure of laboratory yardstick, above-mentioned incrustation problem is subtle, and still, on commercial Application yardstick, this incrustation problem certainly will highlight; Therefore, how not shutting down, do not tear open under the prerequisite of machine, immediately, effectively removing the dirty lamination on this quartz ampoule outer wall, maintain the lasting high efficiency of this microwave and photo catalysis processing unit, is another technical problem meriting attention.
Summary of the invention
Technical problem to be solved by this invention is, for the weak point existing in above-mentioned CN102260003A application case,, the heat etching of the membrane separation assemblies bringing because of this case design feature and operating mechanism destroys problem, and, quartz ampoule outer wall incrustation problem, research and development one can total ground solution to the problems described above.
The present invention solve the technical problem by following scheme, this scheme provides a kind of microwave and photo catalysis wastewater degradation processing unit inner key member maintaining method, the method comprises the following steps: a, the membrane separation assemblies that is positioned at microwave and photo catalysis reative cell inside is contained with the boxes and baskets shape micro-wave screening cover of metal material, make the inside of membrane separation assemblies in this boxes and baskets shape micro-wave screening cover, this its appearance profile of boxes and baskets shape micro-wave screening cover is box-shaped, this profile is on the boxes and baskets shape micro-wave screening cover of box-shaped and contains many holes, this its overall position of boxes and baskets shape micro-wave screening cover is also the inside at described microwave and photo catalysis reative cell, this boxes and baskets shape micro-wave screening cover is the member for membrane separation assemblies and microwave source are kept apart, b, installs ultrasonic transducer at inside or the outer surface of microwave and photo catalysis reactor, c, is connected this ultrasonic transducer with one end of higher-order of oscillation electric signal transmission cable, d, is connected the other end of this higher-order of oscillation electric signal transmission cable with higher-order of oscillation electric signal generator, e, switches on power higher-order of oscillation electric signal generator.
In view of the related microwave environment of this reactor, the ultrasonic transducer structure that can resist microwave interference and damage is preferred structure, and therefore, the preferred ultrasonic transducer that is suitable for this case is the ultrasonic transducer with the armouring of metal shell.The ultrasonic transducer with the armouring of metal shell can customize to ultrasonic device specialized factory.
Described in this case, ultrasonic transducer can be the ultrasonic transducer of commercially available any form; Described in this case, ultrasonic transducer can certainly be the ultrasonic transducer of setting up ultrasonic variable amplitude bar.
No matter whether described ultrasonic transducer is the ultrasonic transducer with the armouring of metal shell, and also no matter its installing mode is built-in mode or is external mode, further always useful for the shielding of microwave, consider based on this, can further be coated in the periphery of described ultrasonic transducer micro-wave screening thing, this micro-wave screening thing can be the electromagnetic isolation cover that is cage shape, this cage shape electromagnetic isolation cover is for preventing interference and the damage of microwave to described ultrasonic transducer, described ultrasonic transducer is coated wherein by described cage shape electromagnetic isolation cover, the material of this cage shape electromagnetic isolation cover is metal material.The cage shape electromagnetic isolation cover of described metal material as its name suggests, is metal cap multiple hole, that be cage shape.
Described in this case, boxes and baskets shape micro-wave screening cover and cage shape electromagnetic isolation cover are all the metal cage members for isolating effect of microwave, only, the object difference of protection, its mechanism of the infringement that resist is not identical.
Because ultrasonic cavitation is the very strong effect of one, low-frequency ultrasonic waves is stronger to the surface impacts of object workpiece, the cavitation of this low-frequency ultrasonic waves is not too applicable to for the described quartz ampoule lateral surface of inside reactor, because, if use for a long time this ultrasonic mechanism to radiation low-frequency ultrasonic waves in reactor, the powerful ultrasonic cavitation of this low-frequency ultrasonic waves will cause the destruction of its lateral surface fineness of quartz ampoule of inside reactor so, and gradually to the husky glass surface Forms Transformation of hair, this has also hindered the penetrating of ultraviolet light to a certain extent, deviate from mutually with the original intention of this case, but along with the raising of selected ultrasonic frequency, cavitation weakens the damage of object workpiece gradually until can ignore, therefore the preferred ultrasonic frequency that, is suitable for this case is not random frequency.
As mentioned above, damage for avoiding the hair of the described quartz ampoule lateral surface of ultrasonic cavitation to inside reactor to desertify, the hyperacoustic preferred frequency that this ultrasonic transducer is launched at least should be more than 100KHz; Its scope of hyperacoustic preferred frequency that this transducer is launched is between 100KHz and 12MHz.
Meanwhile, for avoiding the damage of the membrane separation assemblies of ultrasonic wave to inside reactor, should select lower powered ultrasonic wave; Capacity, ultraviolet lamp tube quantity, quartz ampoule quantity of volume, the internal liquid of reactor etc. depended in the selection of ultrasonic power, the mode that also depends on ultrasonic wave transmitting continues or intermittently etc. the selection of mode, and ultrasonic power can be determined according to the comprehensive consideration that needs of real reaction body system.
With the power supply that described higher-order of oscillation electric signal transmission cable is connected, can be both the simple power supply using of connecting, this power supply can certainly be the power supply with electric power timing switch; Utilize this power supply with electric power timing switch, can realize hyperacoustic timing emission control; Described electric power timing switch can be the timing switch with program module certainly.Described various timing switch all has commercially available.
In view of the environment for use of this case ultrasonic transducer; problem against corrosion merits attention; therefore; its preferred scheme of described ultrasonic transducer; it is the ultrasonic transducer of selecting with polytetrafluoroethylene protective layer or Kynoar protective layer; the step of this case method thus, can also be included in the external coating of ultrasonic transducer, coated polytetrafluoroethylene protective layer or Kynoar protective layer.
With regard to polytetrafluoroethylene application and Kynoar application techniques itself, for the professional in macromolecular material application techniques field, be only known.
The ultrasonic transducer with polytetrafluoroethylene protective layer or Kynoar protective layer also can directly customize to ultrasonic device specialized factory.
This case method can further include some other steps, described other step for example: application on high-frequency electrical signal transmission cable, coated polytetrafluoroethylene protective layer or Kynoar protective layer; Described other step is also for example: set metal silk screen screen on high-frequency electrical signal transmission cable, and this woven wire screen disturbs for the microwave that intercepts these its surrounding enviroment of cable; Etc..
The quantity of described ultrasonic transducer can be also more than one; The quantity of described ultrasonic transducer is not limit, and the quantity of described ultrasonic transducer can be quantity arbitrarily; The quantity of described ultrasonic transducer can be set according to the comprehensive consideration that needs of practical systems.
Advantage of the present invention is, membrane separation assemblies is contained in it with the boxes and baskets shape micro-wave screening cover of metal material, make the impact of microwave cannot arrive the locations of structures of described membrane separation assemblies, the absorption of the material that has stoped thus metal particle that its element surface of membrane separation assemblies adheres to and carbon granules and so on to microwave energy, and then contained that the heat etching of described membrane separation assemblies destroys process.
On the other hand; in this case method; by the inside at reactor or outer surface, ultrasonic transducer is installed; utilize high-frequency ultrasonic; do not shutting down, do not tearing open under machine prerequisite; realize the instant removing of the incrustation of the described quartz ampoule lateral surface of microwave and photo catalysis inside reactor, maintain by this high penetration performance of described quartz ampoule to ultraviolet light, and maintain the lasting high efficiency of microwave and photo catalysis reaction unit.
This case method has solved the maintenance issues that relates to described two key members totally.
Embodiment
The enforcement of this case method, key step is as follows:
A, the membrane separation assemblies that is positioned at microwave and photo catalysis reative cell inside is contained with the boxes and baskets shape micro-wave screening cover of metal material, make the inside of membrane separation assemblies in this boxes and baskets shape micro-wave screening cover, this its appearance profile of boxes and baskets shape micro-wave screening cover is box-shaped, this profile is on the boxes and baskets shape micro-wave screening cover of box-shaped and contains many holes, this its overall position of boxes and baskets shape micro-wave screening cover is also in the inside of described microwave and photo catalysis reative cell, and this boxes and baskets shape micro-wave screening cover is the member for membrane separation assemblies and microwave source are kept apart;
B, installs ultrasonic transducer at inside or the outer surface of microwave and photo catalysis reactor;
C, is connected this ultrasonic transducer with one end of higher-order of oscillation electric signal transmission cable;
D, is connected the other end of this higher-order of oscillation electric signal transmission cable with higher-order of oscillation electric signal generator;
E, switches on power higher-order of oscillation electric signal generator.
This ultrasonic transducer preferably has the ultrasonic transducer of the armouring of metal shell.
This ultrasonic transducer preferably has the ultrasonic transducer of cage shape electromagnetic isolation cover, and the material of this cage shape electromagnetic isolation cover is metal material.
Its scope of the preferred tranmitting frequency of this ultrasonic transducer is between 100KHz and 12MHz.
This power supply is preferably with the power supply of electric power timing switch.
Its enforcement of the method is further comprising the steps of, at the external coating of ultrasonic transducer, coated polytetrafluoroethylene protective layer or Kynoar protective layer.
Its enforcement of the method also allows further comprising the steps, application on high-frequency electrical signal transmission cable, coated polytetrafluoroethylene protective layer or Kynoar protective layer.
Institute's application, coated polytetrafluoroethylene protective layer or its thickness of Kynoar protective layer can be the thickness of specifying arbitrarily; The protective layer of any thickness can be brought into play certain protective effect; The thickness of this protective layer can be determined according to actual needs.
Its enforcement of the method also allows further comprising the steps, set metal silk screen screen on high-frequency electrical signal transmission cable, and this woven wire screen disturbs for the microwave that intercepts these its surrounding enviroment of cable.
Described ultrasonic transducer is together with the higher-order of oscillation electric signal generator linking together with it via higher-order of oscillation electric signal transmission cable, and, line related, form ultrasound emission mechanism, under the situation of described ultrasound emission mechanism continuous operations, its process of the fouling of described quartz ampoule lateral surface can be suppressed completely.
Certainly, described continuous operations not necessarily, because also can intermittently operate, or as required specifically exempting to manually boot its running under the clean situation of the machine of tearing open, operate several minutes or tens of minutes such as manually booting in space-number week; Etc..
Related boxes and baskets shape micro-wave screening cover is implemented in this case and cage shape electromagnetic isolation cover is all the metal cage member for isolating effect of microwave, only, the object difference of protection, its mechanism of the infringement that resist is not identical.
The ultrasonic transducer that related ultrasonic transducer can be commercially available any form is implemented in this case; It can certainly be the ultrasonic transducer of setting up ultrasonic variable amplitude bar that related ultrasonic transducer is implemented in this case.
Claims (5)
1. the inner key member maintaining method of microwave and photo catalysis wastewater degradation processing unit, this wastewater degradation processing unit is a microwave and photo catalysis reactor, this reactor is using microwave as excitaton source, excite electrodeless ultraviolet lamp transmitting ultraviolet ray, irradiate the suspension-turbid liquid that is mixed with photochemical catalyst titanium dioxide in liquid internal, this electrodeless ultraviolet lamp is shrouded and is protecting by quartz ampoule, there is air pump to continue to inject air to this quartz ampoule inner chamber, the air being overflowed by quartz cavity is via pipeline and the micro porous aeration head UNICOM that is positioned at reactor bottom, the lower zone of this inside reactor is aeration zone, the upper area of this inside reactor is microwave and photo catalysis reaction zone, this reactor is also with built-in membrane separation assemblies, carry the water of analysing after purification, and realize holding back again of photochemical catalyst titanium dioxide fine particles with this membrane separation assemblies and use, among the structure of this reactor, between its non-polar ultraviolet light source and membrane separation assemblies, set up dividing plate, this dividing plate is for preventing the radiation damage of ultraviolet ray to organic membrane separation assemblies, it is characterized in that, the key step of the method is as follows: a, the membrane separation assemblies that is positioned at microwave and photo catalysis inside reactor is contained with the boxes and baskets shape micro-wave screening cover of metal material, make the inside of membrane separation assemblies in this boxes and baskets shape micro-wave screening cover, this its appearance profile of boxes and baskets shape micro-wave screening cover is box-shaped, this profile is on the boxes and baskets shape micro-wave screening cover of box-shaped and contains many holes, this its overall position of boxes and baskets shape micro-wave screening cover is also the inside at described microwave and photo catalysis reactor, this boxes and baskets shape micro-wave screening cover is the member for membrane separation assemblies and microwave source are kept apart, b, installs ultrasonic transducer at inside or the outer surface of microwave and photo catalysis reactor, and its frequency of the ultrasonic wave that this ultrasonic transducer is launched is between 100KHz and 12MHz, c, is connected this ultrasonic transducer with one end of higher-order of oscillation electric signal transmission cable, d, is connected the other end of this higher-order of oscillation electric signal transmission cable with higher-order of oscillation electric signal generator, e, switches on power higher-order of oscillation electric signal generator.
2. the inner key member maintaining method of microwave and photo catalysis wastewater degradation processing unit according to claim 1, is characterized in that, this ultrasonic transducer is the ultrasonic transducer with the armouring of metal shell.
3. the inner key member maintaining method of microwave and photo catalysis wastewater degradation processing unit according to claim 1 and 2, it is characterized in that, this ultrasonic transducer is coated wherein by cage shape electromagnetic isolation cover, the material of this cage shape electromagnetic isolation cover is metal material, and this cage shape electromagnetic isolation cover is for stoping the interference of microwave to ultrasonic transducer.
4. the inner key member maintaining method of microwave and photo catalysis wastewater degradation processing unit according to claim 1, is characterized in that, this power supply is the power supply with electric power timing switch.
5. the inner key member maintaining method of microwave and photo catalysis wastewater degradation processing unit according to claim 1; it is characterized in that; the method is further comprising the steps of, at the external coating of ultrasonic transducer, coated polytetrafluoroethylene protective layer or Kynoar protective layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210234814.2A CN102745850B (en) | 2012-06-25 | 2012-06-25 | Method for maintaining internal key components of microwave photocatalytic wastewater-degrading processing device |
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| CN201210234814.2A CN102745850B (en) | 2012-06-25 | 2012-06-25 | Method for maintaining internal key components of microwave photocatalytic wastewater-degrading processing device |
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| CN102745850A CN102745850A (en) | 2012-10-24 |
| CN102745850B true CN102745850B (en) | 2014-11-05 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5068030A (en) * | 1990-11-09 | 1991-11-26 | Oxford Science Industrial Co., Ltd. | Water filtering sterilizing and heating apparatus |
| CN101055106A (en) * | 2007-01-31 | 2007-10-17 | 蒋遂安 | Method and apparatus for quickly and deeply purifying air or water or other fluid at low cost |
| CN201458790U (en) * | 2009-09-09 | 2010-05-12 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Water treatment device combining ultraviolet disinfection and ultrasound |
| CN102260003A (en) * | 2011-05-31 | 2011-11-30 | 武汉纺织大学 | Microwave electrodeless ultraviolet photocatalysis-double membrane separation coupled treatment device for industrial wastewater |
-
2012
- 2012-06-25 CN CN201210234814.2A patent/CN102745850B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5068030A (en) * | 1990-11-09 | 1991-11-26 | Oxford Science Industrial Co., Ltd. | Water filtering sterilizing and heating apparatus |
| CN101055106A (en) * | 2007-01-31 | 2007-10-17 | 蒋遂安 | Method and apparatus for quickly and deeply purifying air or water or other fluid at low cost |
| CN201458790U (en) * | 2009-09-09 | 2010-05-12 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Water treatment device combining ultraviolet disinfection and ultrasound |
| CN102260003A (en) * | 2011-05-31 | 2011-11-30 | 武汉纺织大学 | Microwave electrodeless ultraviolet photocatalysis-double membrane separation coupled treatment device for industrial wastewater |
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