CN216785775U - Device for degrading organic matters in wastewater based on laser catalysis - Google Patents
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Abstract
The utility model relates to a wastewater treatment technology. The utility model aims to provide a device for degrading organic matters in wastewater based on laser catalysis, which can solve the problem that the wastewater is directly irradiated by a traditional ultraviolet lamp light source or a high-power ultraviolet or near ultraviolet laser in the existing photocatalysis technology, and can monitor the treatment condition in real time after corresponding treatment software is added, and the technical scheme can be summarized as follows: the device for degrading organic matters in wastewater based on laser catalysis comprises a laser, a focusing unit and a real-time detection unit, wherein the focusing unit and the real-time detection unit are respectively connected with the laser, laser emitted by the laser is emitted through the focusing unit, the real-time detection unit comprises a continuous laser matched with the characteristic absorption wavelength of an organic matter solution in wastewater to be treated, a detection light path transmission unit and a laser energy meter, and the laser emitted by the continuous laser is transmitted to the laser energy meter through the detection light path transmission unit. The utility model has the advantages of convenient use and suitability for wastewater treatment devices.
Description
Technical Field
The utility model relates to a wastewater treatment technology, in particular to a technology for treating organic matters in wastewater based on laser.
Background
With the rapid development of industrialization, the problem of water environment pollution is becoming more serious, especially the waste water generated in the printing and dyeing textile industry has high organic matter concentration and complex components, and besides the problems that the dyes have bright colors, which can cause aesthetic water quality deterioration and hinder dissolved oxygen from permeating into natural water, some dyes can be carcinogenic in nature and seriously harm the life health of people, so that the problem of dye pollution is being solved urgently, and Methylene Blue (MB) is one of typical organic pollutants in the waste water, and the degradation of the Methylene Blue (MB) is an important step for treating the waste water.
The prior art adopts various physical, chemical and biological methods for solving the problem of organic matters in wastewater, such as adsorption, coagulation, membrane separation, biological oxidation and the like, but the conventional methods are usually not enough for purifying wastewater, and the current method for removing organic pollutants by photocatalysis is concerned about due to the advantages of high efficiency, energy conservation and the like, the photocatalysis technology is to combine light radiation with oxidants such as hydrogen peroxide, oxygen and the like to generate hydroxyl radicals to promote the removal of the organic matters, but most of the current researches on the photocatalytic degradation of dyes (organic matters) in wastewater use a xenon lamp or a mercury vapor high-pressure lamp as an ultraviolet lamp light source (namely a traditional ultraviolet lamp light source) and use titanium dioxide (TiO) as a TiO (TiO) high-pressure lamp2) Proceeding as a photocatalyst, conventional uv lamp light sources emit radiation over a wide range of wavelengths, and there are several problems with the use of uv lamps: long-term power instability, low photon efficiency, long-time pollutant irradiation, complete mineralization realization, harmful mercury existence and the like, and the traditional photocatalytic material represented by titanium dioxide has low forbidden bandwidth and quantum utilization rate and is greatly improvedLimiting the application range of the photocatalytic technology.
At present, a novel, safe and efficient alternative light source is laser, because laser is a coherent, monochromatic and highly directional light source, compared with a light source with a wide frequency spectrum, incident photons can be absorbed more effectively, thereby improving the photocatalytic degradation rate, but at present, when a laser is adopted to treat organic matters in wastewater, research is focused on adopting a high-power ultraviolet or near ultraviolet laser, and the high-power ultraviolet or near ultraviolet laser directly irradiates the wastewater to generate photocatalysis, and because of the problems of higher power consumption, larger volume and the like, the high-power ultraviolet or near ultraviolet laser has higher cost, so that the high-power ultraviolet or near ultraviolet laser is not suitable for use, at present, no related scheme for performing photocatalytic degradation on the wastewater by using lasers except the ultraviolet laser and the near ultraviolet laser is provided, and when wastewater is treated by adopting a photocatalytic technology, nor to monitor the processing conditions in real time
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device for degrading organic matters in wastewater based on laser catalysis, which can solve the problem that the wastewater is directly irradiated by a traditional ultraviolet lamp light source or a high-power ultraviolet laser or a near ultraviolet laser in the existing photocatalysis technology, and can monitor the treatment condition in real time after corresponding treatment software is added.
The device for degrading organic matters in wastewater based on laser catalysis comprises a laser, a focusing unit and a real-time detection unit, wherein the focusing unit and the real-time detection unit are respectively connected with the laser, laser emitted by the laser is emitted through the focusing unit, the real-time detection unit comprises a continuous laser matched with the characteristic absorption wavelength of an organic matter solution in wastewater to be treated, a detection light path transmission unit and a laser energy meter, and the laser emitted by the continuous laser is transmitted to the laser energy meter through the detection light path transmission unit.
Specifically, to describe the detection light path transmission unit, the detection light path transmission unit includes at least one reflector and a bracket connecting the reflector and the laser energy meter. Preferably, the support is a telescopic support, and when the support is telescopic, the length of the light path can be adjusted by driving the reflector mounted on the support to move.
Furthermore, in order to detect the energy of the laser emitted by the laser, the laser energy meter further comprises a spectroscope, the laser emitted by the laser is firstly split by the spectroscope and then divided into two beams, one beam is emitted after passing through the focusing unit, and the other beam is transmitted to the laser energy meter.
Specifically, to illustrate the focusing unit, the focusing unit is a convex lens. To illustrate which laser is used, the laser is a near infrared laser, such as a 1064 nNd YAG laser.
Still further, when the device for degrading organic matters in wastewater based on laser catalysis is applied to indoor environments such as laboratories or wastewater treatment plants, and the like, the device is convenient to use, and further comprises a photocatalytic reactor, wherein the photocatalytic reactor at least comprises a wastewater container, the relative positions of the laser, the real-time detection unit and the wastewater container are fixed, the laser emitted by the laser passes through the focusing unit and then is focused inside the wastewater container, and the detection light path transmission unit enables at least one part of the light path of the laser emitted by the continuous laser to be positioned inside the wastewater container.
Specifically, in order to improve the degradation efficiency of organic matters in the wastewater, the photocatalytic reactor further comprises metal, the metal is arranged in the wastewater container, and the laser emitted by the laser is focused on the metal after passing through the focusing unit.
Further, to describe which metal is used, the metal is a metal that is insoluble in the wastewater to be treated and does not react with the wastewater to be treated; preferably iron or an iron alloy; to illustrate the shape of the metal, the metal is preferably in the form of a sheet.
Specifically, when the device for degrading organic matters in wastewater based on laser catalysis is applied to a laboratory, the wastewater container is a quartz beaker for convenient observation; the photocatalytic reactor also comprises a quartz window, and the quartz window is used for covering the quartz beaker; the quartz glass is used for preventing dust or other pollutants from falling into the quartz beaker and preventing liquid from splashing when laser is incident.
And the laser plasma radiation light collection unit can collect laser plasma radiation light generated after laser emitted by the near-infrared laser is focused by the focusing unit and transmits the laser plasma radiation light to the optical fiber spectrometer. Wherein the laser plasma radiation light collection unit is a convex lens or a convex lens group.
The utility model has the advantages that when in use, the laser emitted by the laser is focused below the water surface of the wastewater to be treated through the focusing unit to irradiate so as to generate laser plasma, and the ultraviolet light generated by the laser plasma is utilized to carry out photocatalytic degradation on the organic matters in the wastewater, so that other lasers can be used as laser sources in the photocatalytic degradation technology and are not limited to ultraviolet light sources (ultraviolet lamps or ultraviolet lasers or near ultraviolet lasers), the use is convenient, the cost is saved, the realization is easy, in addition, the real-time detection unit is added, after the corresponding treatment software is added, the light-emitting spectrum of continuous laser matched with the characteristic absorption wavelength of the organic matter solution in the wastewater to be treated can be monitored in real time through the laser energy meter, thereby confirming the processing situation.
Drawings
FIG. 1 is a schematic diagram of an apparatus for degrading organic matters in wastewater based on laser catalysis in the embodiment of the utility model.
FIG. 2 is a graph showing the degradation efficiency of methylene blue over time in five control experiments according to the example of the present invention.
FIG. 3 is a graph of the emission spectrum of a 1064 nNd YAG laser.
FIG. 4 is a graph of the emission spectrum of a methylene blue solution when a focused 1064nmNd: YAG laser irradiates the methylene blue solution in an example of the present invention.
FIG. 5 is a spectrum of emission of a methylene blue solution obtained by depositing an aluminum flake in the methylene blue solution and then focusing laser light from a 1064nmNd YAG laser on the aluminum flake to irradiate the methylene blue solution according to an embodiment of the present invention.
FIG. 6 is a graph of the emission spectrum of an aluminum sheet in which a 1064 nNd: YAG laser was focused on the aluminum sheet in air in an example of the present invention.
FIG. 7 is a graph showing the emission spectrum of an iron piece when laser light from a 1064 nNd: YAG laser is focused on the iron piece in air in the example of the present invention.
FIG. 8 is a spectrum of emission of a methylene blue solution obtained by placing an iron plate in the methylene blue solution and then focusing laser light from a 1064 nmNd-YAG laser on the iron plate to irradiate the methylene blue solution according to the embodiment of the present invention.
FIG. 9 is a schematic diagram of a transient surface temperature distribution based on a thermal diffusion model in an embodiment of the present invention.
Fig. 10 shows the change of the absorption spectrum of the methylene blue solution with time when the methylene blue solution is irradiated by focusing laser light emitted from a 1064 nmNd-YAG laser on an iron sheet after an iron sheet is placed in the methylene blue solution in the embodiment of the present invention.
Detailed Description
The technical solution of the present invention is described in detail below with reference to the embodiments and the accompanying drawings.
The device for degrading organic matters in wastewater based on laser catalysis is shown in the schematic diagram of fig. 1 and comprises a laser, a focusing unit and a real-time detection unit, wherein the focusing unit and the real-time detection unit are respectively connected with the laser, laser emitted by the laser is emitted through the focusing unit, the real-time detection unit comprises a continuous laser (for example, when methylene blue in wastewater is degraded, the laser wavelength emitted by the continuous laser is preferably 665nm), a detection light path transmission unit and a laser energy meter, and the laser emitted by the continuous laser is transmitted to the laser energy meter through the detection light path transmission unit.
To illustrate the detection optical path transmission unit, the detection optical path transmission unit may include at least one reflecting mirror and a bracket (not shown in fig. 1) connecting the reflecting mirror and the laser power meter; preferably, the support can be telescopic support, and when it is flexible, thereby can adjust light path length through driving the speculum of installing on it and moving, can adopt this system like this to handle lake or other comparatively large-scale water sources, convenient carry out real-time supervision to it. Certainly, when the device is used in a laboratory, the detection light path transmission unit can be a ray and only needs to penetrate through the wall of the transparent waste water container, so that the white light emitted by the white light source can be ensured to have a part of light path in the waste water.
In order to detect the energy of the laser emitted by the laser, a beam splitter may be further included, as shown in fig. 1, wherein the laser emitted by the laser is split into two beams after passing through the beam splitter, one beam is emitted after passing through the focusing unit, and the other beam is transmitted to the laser energy meter.
To illustrate the focusing unit, the focusing unit may be a convex lens. To illustrate which laser is used, the laser can be a near infrared laser, such as a 1064 nNd YAG laser.
When the device for degrading organic matters in wastewater based on laser catalysis is applied to indoor environments such as laboratories or wastewater treatment plants, and the like, the device can further comprise a photocatalytic reactor for convenient use, wherein the photocatalytic reactor at least comprises a wastewater container, the relative positions of a laser, a real-time detection unit and the wastewater container are fixed, laser emitted by the laser passes through a focusing unit and then is focused inside the wastewater container, and a detection light path transmission unit enables at least one part of a light path of laser emitted by a continuous laser to be positioned inside the wastewater container. That is, when the continuous laser is used, the detection optical path transmission unit can enable at least one part of the optical path of the laser emitted by the continuous laser to be positioned in the waste water.
In order to improve the degradation efficiency of organic matters in the wastewater, the photocatalytic reactor can also comprise metal, wherein the metal is arranged in the wastewater container, and the laser emitted by the laser is focused on the metal after passing through the focusing unit.
To illustrate which metal is used, the metal is a metal that is insoluble in the wastewater to be treated and does not react with the wastewater to be treated; preferably iron or an iron alloy; to illustrate the shape of the metal, the metal is preferably in the form of a sheet.
When the device for degrading organic matters in wastewater based on laser catalysis is applied to a laboratory, the wastewater container can be a quartz beaker for convenient observation; the photocatalytic reactor can also comprise a quartz window which is used for covering the quartz beaker; the quartz glass is used for preventing dust or other pollutants from falling into the quartz beaker and preventing liquid from splashing when laser is incident.
In order to observe the light-emitting signal of the laser plasma, the device also comprises an optical fiber spectrometer and a laser plasma radiation light acquisition unit, wherein the laser plasma radiation light acquisition unit is positioned to acquire laser plasma radiation light generated after laser emitted by the near-infrared laser is focused by the focusing unit and transmit the laser plasma radiation light to the optical fiber spectrometer; for example, using a lateral collection method: the collection direction of the plasma radiation light is positioned on the side wall of the quartz beaker, two focusing lenses (namely convex lenses) are utilized to couple the laser plasma radiation light signal into the fiber spectrometer, and then the luminescence spectrogram of the laser plasma is obtained through computer Brolight software.
The following description of the principle of use of the utility model is given by way of example and experimental control:
taking 20mg/L methylene blue solution as an example of the wastewater, establishing five groups of comparison experiments, namely directly irradiating the methylene blue solution by using an unfocused 1064nmNd YAG laser, irradiating the methylene blue solution by using a focused 1064nmNd YAG laser, putting an aluminum sheet into the methylene blue solution, then focusing laser emitted by the 1064nmNd YAG laser on the aluminum sheet to irradiate the methylene blue solution, putting an iron sheet into the methylene blue solution, then focusing laser emitted by the 1064nmNd YAG laser on the iron sheet to irradiate the methylene blue solution, and directly irradiating the methylene blue solution by using a 450nm ultraviolet lamp; the volume and temperature of methylene blue solution in five control experiments are the same, and the experimental results are shown in figure 2.
The analysis was as follows:
1. YAG laser directly irradiates methylene blue solution:
as can be seen from FIG. 2, the degradation rate of methylene blue hardly changes with the increase of time, the degradation rate only reaches about 1% when the illumination time is 25min (minute), and methylene blue is not removed, which is caused by the fact that the laser in the set of experiments emits infrared light with 1064nm waveband when the laser is unfocused, the emission spectrum is shown in FIG. 3, and usually, the methylene blue is self-degraded, the light waveband of which is smaller than 450nm, because only the ultraviolet waveband can promote the aqueous solution to generate hydroxyl radicals, thereby degrading the organic methylene blue, therefore, the unfocused 1064nm Nd: YAG laser cannot degrade the methylene blue.
2. YAG laser irradiated methylene blue solution at a focus of 1064nmNd:
as can be seen from FIG. 2, the degradation rate of methylene blue is increased with the increase of time, and the degradation rate reaches 10% when the illumination time is 25min, which is caused by the following phenomenon: firstly, the methylene blue is irradiated by laser, and laser plasma is generated in the process of irradiating the methylene blue, so that the methylene blue has unique physical and chemical properties, including: the temperature is high, the kinetic energy of the particles is large, the aggregate serving as charged particles has metal-like conductivity, the chemical property is active, chemical reaction is easy to occur, the aggregate has a light-emitting characteristic, the aggregate can serve as a light source and the like, laser plasma focused in methylene blue solution generates less ultraviolet light and near ultraviolet light, at the moment, the light-emitting spectrogram of the methylene blue solution is shown in figure 4, and therefore under the action of the ultraviolet light, the water solution can be promoted to generate hydroxyl radicals to degrade organic matter methylene blue.
3. And (2) placing an aluminum sheet in the methylene blue solution, and then focusing laser emitted by a 1064nmNd (yttrium aluminum garnet) laser on the aluminum sheet to irradiate the methylene blue solution:
as can be seen from fig. 2, the degradation rate of methylene blue is also increased with the increase of time, and the degradation rate reaches 12.1% when the illumination time is 25min, compared with the experiment (i.e. the experiment of the above group 2) in which the methylene blue solution is directly irradiated by the focused laser, the degradation efficiency is improved, which indicates that the aluminum sheet has the effect of promoting the degradation of organic matters, which is attributable to the fact that the aluminum sheet is added into the methylene blue solution and then generates stronger ultraviolet light under the excitation of laser plasma, and the spectrogram thereof is shown in fig. 5, which is a continuous broadband spectrum, and although most of the continuous spectral lines excited by aluminum in methylene blue are concentrated in the visible light region, there is a slight fluctuation in the ultraviolet region, which indicates that partial ultraviolet light can be generated under the excitation of plasma after the aluminum sheet is added, and the cause of this phenomenon is that the cavitation phenomenon is generated in the liquid due to the laser pulse effect, since the bubbles generated by a single laser pulse collapse after a period of hundreds of microseconds, adiabatic compression occurs during the collapse of the bubble, a hot spot is generated, the temperature can reach tens of thousands of kelvin, at the end of this period, the bubble may emit a short pulse of light (with a duration in the range of picoseconds to nanoseconds), called sonoluminescence, which usually has a broad spectral emission attributable to the ion-electron recombination that occurs at the high temperature of the compressed bubble, a well-known mechanism that is the sonoluminescence spectrum has a fairly broad wavelength range in liquid and has a portion of high intensity uv emission, and since the water molecules contain hydrogen elements and have high thermal conductivity, the high temperature plasma generated is easily quenched by the water body rapidly, in contrast, the spectrum in water only shows broad band and continuous characteristics, the atomic lines and the ion lines are completely quenched at the metal water interface, so that the aluminum sheet is added into the methylene blue solution, and the generation of ultraviolet light can be enhanced after laser emitted by a laser is focused on the aluminum sheet, so that the degradation of the methylene blue is accelerated.
4. And (2) after an iron sheet is placed in the methylene blue solution, focusing laser emitted by a 1064nmNd (yttrium aluminum garnet) laser on the iron sheet to irradiate the methylene blue solution:
as can be seen from fig. 2, the degradation rate of methylene blue is also improved along with the increase of time, and the degradation rate reaches 39% when the illumination time is 25min, compared with the above experiments of groups 1, 2 and 3, the degradation efficiency is greatly improved, and the visible iron sheet can promote the degradation of the organic methylene blue better than the aluminum sheet, and the reason of the phenomenon is that: compared with iron, aluminum has a low charge number of aluminum core and a low number of electron layers, the coordination ability to the received lone-pair electrons is weaker than that of iron ions, the atomic structure of iron has a partially filled d-orbital, d electrons on the d-orbital absorb photons with certain energy, under the influence of a coordination field, the d-orbital in a low energy state is transited to d-orbital in a high energy state, and an absorption spectrum is generated, the transition is called d-d electronic transition, similarly, the transition is also called coordination field transition, energy level separation occurs in the coordination field, ultraviolet light and visible light are easy to cause electronic transition so as to generate ultraviolet and visible spectra, so that ultraviolet and near ultraviolet spectral lines excited by iron in air are obviously more than spectral lines excited by aluminum, and laser emitted by a visible laser is easier to generate ultraviolet light when being focused on an iron sheet. Similarly, the spectrum excited by the iron plate in the methylene blue solution also detects a broad band spectrum, see fig. 8, due to the breakdown and the photoluminescence emission, the continuous spectral lines excited by iron in the methylene blue solution are concentrated in the ultraviolet region, iron is more likely to generate ultraviolet light in the methylene blue solution than the continuous spectral lines excited by aluminum in the methylene blue solution, and this phenomenon should be due to the difference in the electron transition energy levels of the two metals, the tendency of iron ligand field transition to emit ultraviolet light, and the relatively high surface temperature resulting from the smaller thermal conductivity of iron being realized.
To obtain the surface temperature of the metal in the experiment, the spectrum of the metal-water interface was explained using black body emission. In the research, the heat conduction heat flow through the metal is dominant due to the large heat conductivity coefficient of the metal; the thermal conduction and convection of water are negligible on the nanosecond timescale. Because the thermal diffusion length is small, the radiation penetration depth is small, and under the surface heat flow boundary condition, the heat conduction problem can be regarded as a one-dimensional problem:
where K is the material thermal conductivity, I (t) is the intensity of the incident laser pulse as a function of time,
is normal reflection of the surface of the materialThe rate, T, is the transient temperature. With this model, local thermal equilibrium is assumed, i.e.
Assuming that melting, vaporization and ablation of solid surfaces occur at small levels in nanosecond range of laser heating: (<25nm) without significantly altering the thermal diffusion process. Based on the constant thermal properties, an analytic formula of the transient surface temperature can be obtained by utilizing the Duhamel stacking theorem:
wherein, TeqFor equilibrium temperature, α is the thermal diffusion coefficient, T is the transient temperature, and τ is the integration time. Based on this model, the transient temperature T is numerically calculated, see fig. 9. Using this theory, a stronger emission spectrum is obtained for iron than for aluminum, since iron has a lower thermal conductivity and a higher surface temperature. Iron ion content ablated by plasma in experiment
The occurrence of the comparative fenton reaction was relatively low, so the effect of the generation of iron ions was not considered in this experiment. In conclusion, compared with the aluminum sheet, the iron sheet can effectively enhance the generation of ultraviolet light and promote the degradation of methylene blue.
Fig. 10 shows the change of the absorption spectrum of the methylene blue solution with time when an iron sheet is placed in the methylene blue solution and then laser emitted by a 1064nmNd YAG laser is focused on the iron sheet to irradiate the methylene blue solution, wherein from top to bottom, the first spectral line is the absorption spectrum when the time is 0min, the second spectral line is the absorption spectrum when the time is 5min, the third spectral line is the absorption spectrum when the time is 10min, the fourth spectral line is the absorption spectrum when the time is 15min, and the fifth spectral line is the absorption spectrum when the time is 20 min. The absorption peaks at 292nm and 665nm are reduced, indicating that the methylene blue molecule is degraded into smaller intermediates, such as sulfoxide, sulfone, and sulfonic acid groups, etc. The UV-visible absorption peaks of these compounds are also in the 200-300 and 500-700nm range, similar to methylene blue. These intermediates are difficult to detect using uv-vis spectrophotometers due to their low content and the severe overlap of the absorption spectra. Also, no new absorption peaks were formed during the reaction, supporting the hypothesis that any intermediate products formed during the methylene blue degradation were also successfully degraded. Sohrabnezhad et al also reported that no new absorption peak occurred in the UV-vis region during degradation. In addition, this phenomenon also indicates that methylene blue can be removed under laser plasma irradiation, and the removal rate is faster under the promotion of the iron sheet.
5. Directly irradiating the methylene blue solution by using an ultraviolet lamp with the wavelength of 450 nm:
as can be seen from fig. 2, the degradation rate of methylene blue is also improved with the increase of time, and the degradation rate reaches 10.4% when the illumination time is 25min, compared with the above 4 th group of control experiment, the degradation efficiency is lower, and is slightly inferior to the 3 rd group of control experiment, which is approximately the same as the 2 nd group of control experiment, because although the frequency of the ultraviolet lamp is high, its photons are emitted without any mode, the light source is divergent, so the light energy loss is much, while the laser photons are directionally emitted in a coherent manner, a large number of photons are emitted in a very small spatial range, the energy density is higher, and the ultraviolet energy generated by the laser plasma is higher due to the sonoluminescence, and secondly, the coherence, monochromaticity and high directionality of the laser are compared with the ultraviolet lamp source, so that the incident photons can be effectively absorbed, and the photodegradation rate is improved.
Through the above 5 groups of control experiments, the comparison shows that when an iron sheet is placed in a methylene blue solution and then the 1064nmNd is adopted, the degradation rate is fastest because the laser emitted by a YAG laser is focused on the iron sheet to irradiate the methylene blue solution, and the high-density and high-energy strong ultraviolet light is generated due to sonoluminescence in the experiment, but because the energy level transition between metals is different from the thermal conductivity coefficient, and the excited strong ultraviolet light can generate light with different intensities, compared with aluminum, the iron has stronger ultraviolet light generation capability, and meanwhile, compared with the ultraviolet light used in most experiments, the methylene blue can be degraded more quickly under the condition of effectively utilizing the sonoluminescence energy.
In this example, a 1064nmNd laser is used, which is a near-infrared laser, and the wavelength difference of the near-infrared laser with respect to ultraviolet light is larger than that of other visible light with respect to ultraviolet light, and since the near-infrared laser can produce the above effects in the control experiments of groups 2, 3 and 4, i.e., can catalyze the degradation of methylene blue (i.e., organic matter in wastewater), other lasers should also produce the effects.
Therefore, the system for degrading the organic matters in the wastewater based on laser catalysis can achieve the recorded effects.
After corresponding processing software is added, when the device is used, the laser energy meter can obtain the numerical value of the continuous laser beam, and whether the dye is degraded or not can be proved according to the change of the numerical value, so that the aim of determining the processing condition in real time is fulfilled. The corresponding processing software adopted by the laser energy meter is a mature technology in the field and is not described in detail here.
Referring to the above technical contents, it can be seen that the corresponding processing software used in the present invention can be reasonably derived by those skilled in the art according to the specific structure of the system for degrading organic matters in wastewater based on laser catalysis of the present invention, and belongs to the prior art, which is not the scope of the present invention.
Claims (10)
1. Device based on organic matter in laser catalysis degradation waste water, its characterized in that includes laser instrument, focus unit and real-time detection unit, and focus unit and real-time detection unit are connected with the laser instrument respectively, the laser that the laser instrument sent sends through focus unit, real-time detection unit includes with organic matter solution characteristic absorption wavelength assorted continuous laser instrument, detection light path transmission unit and laser energy meter in the waste water of preliminary treatment, the laser that continuous laser instrument sent passes through detection light path transmission unit and transmits to laser energy meter.
2. The apparatus for degrading organic matters in wastewater based on laser catalysis of claim 1, wherein the detection light path transmission unit comprises at least one reflector and a bracket connecting the reflector and the laser energy meter.
3. The device for degrading organic matters in wastewater based on laser catalysis as claimed in claim 2, wherein the support is a telescopic support, and when the telescopic support is telescopic, the length of the optical path can be adjusted by driving the reflector mounted on the telescopic support to move.
4. The apparatus for degrading organic matters in wastewater based on laser catalysis as claimed in claim 1, further comprising a spectroscope, wherein the laser emitted by the laser is first split into two beams by the spectroscope, one beam is emitted after passing through the focusing unit, and the other beam is transmitted to the laser energy meter.
5. The apparatus for degrading organic matters in wastewater based on laser catalysis according to claim 1, wherein the focusing unit is a convex lens.
6. The apparatus for degrading organic matters in wastewater based on laser catalysis according to claim 1, further comprising a photocatalytic reactor, wherein the photocatalytic reactor at least comprises a wastewater container, the relative positions of the laser, the real-time detection unit and the wastewater container are fixed, the laser emitted by the laser passes through the focusing unit and then is focused inside the wastewater container, and the detection light path transmission unit enables at least a part of the light path of the laser emitted by the continuous laser to be located inside the wastewater container.
7. The apparatus for degrading organic matters in wastewater based on laser catalysis of claim 6, wherein the photocatalytic reactor further comprises a metal, the metal is disposed inside the wastewater container, and the laser emitted by the laser passes through the focusing unit and is focused on the metal.
8. The device for degrading organic matters in wastewater based on laser catalysis according to claim 6, wherein the wastewater container is a quartz beaker; the photocatalytic reactor also comprises a quartz window which is used for covering the quartz beaker.
9. The device for degrading organic matters in wastewater based on laser catalysis as claimed in claim 6, further comprising an optical fiber spectrometer and a laser plasma radiation light collection unit, wherein the laser plasma radiation light collection unit is positioned to collect laser plasma radiation light generated by the laser focused by the focusing unit and transmit the laser plasma radiation light to the optical fiber spectrometer.
10. The apparatus for degrading organic matters in wastewater based on laser catalysis of claim 9, wherein the laser plasma radiation light collection unit is a convex lens or a convex lens group.
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