CN113029243A - Method and system for monitoring key operation parameters of ultraviolet reactor - Google Patents
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Abstract
The invention relates to a method and a system for monitoring key operation parameters of an ultraviolet reactor, wherein the method comprises the following steps: obtaining incident photon flow q and optical path length d of the ultraviolet reactor; obtaining corrected incident photon flux qc(ii) a Obtaining an ultraviolet light source power output coefficient f according to the wall irradiation probe data of the ultraviolet reactor and the ultraviolet transmittance T of the water flow; correcting incident photon flux q from ultraviolet reactorcThe power output coefficient f of the ultraviolet light source, the ultraviolet transmittance T of the water flow and the optical path length d to obtain the average radiation intensity E of the ultraviolet reactor in actual operationt(ii) a Ultraviolet reactor based treatment water flow Q and average radiation intensity EtObtaining the average ultraviolet dose F of the ultraviolet reactor in actual operationt. The invention realizes the determination of the key operation parameters of the ultraviolet reactor, namely the power output coefficient of the light source, the average radiation intensity and the average ultraviolet dose, and provides the high-efficiency safe application of the water treatment ultraviolet technologyA convenient and reliable monitoring method is provided.
Description
Technical Field
The invention relates to a method and a system for monitoring key operation parameters of an ultraviolet reactor, and relates to the technical field of environmental monitoring and water treatment.
Background
The water treatment ultraviolet technology generally comprises ultraviolet disinfection and advanced oxidation, has the advantages of high treatment efficiency, convenient operation and management, less byproduct generation and the like, is widely applied to domestic and foreign water treatment processes at present, and has specific application scenes including effluent disinfection of waterworks, secondary water supply disinfection of communities, effluent disinfection of sewage plants and advanced oxidation removal of trace organic pollutants in water. Among them, drinking water treatment, including disinfection and advanced treatment in water works and secondary water supply disinfection, usually employs a closed tube type ultraviolet reactor. In addition, the tubular ultraviolet reactor is also widely applied to small-scale water supply disinfection and water quality purification of villages and small towns.
The core of the ultraviolet technical efficiency lies in the size of the ultraviolet dose provided by the ultraviolet reactor, and the dose determines the inactivation rate of microorganisms and the degradation removal rate of pollutants. The ultraviolet dose is the product of the ultraviolet radiation intensity and the irradiation time. However, because the light source radiation diverges outward and there is absorption, reflection, and refraction by multiple media, the radiation intensity varies from location to location within the uv reactor, resulting in significant differences in the uv dose received by the microorganisms or contaminants as they pass through the reactor. In addition, during the actual operation of the uv reactor, the output power of the uv light source may be attenuated due to contamination of the sleeve and aging of the lamp tube, so that the uv radiation intensity and dose measured in the initial state cannot be used universally. Unlike conventional chemical treatment techniques, ultraviolet radiation is a physical process, and its dose cannot be directly measured by the balance in water. Therefore, it is very necessary to perform dose evaluation and monitoring of the water treatment uv reactor.
The monitoring strategies for the average dose or effective dose of the ultraviolet reactor in the prior art are mainly divided into two categories: firstly, synchronously recording one or more wall irradiation probe indicating values when the reactor dosage is verified, and enabling the probe indicating values of the reactor to be not lower than the set value under the same flow in actual operation, thereby ensuring that the dosage of the ultraviolet reactor reaches the standard; and the other method is to establish a correlation between the ultraviolet dose and the parameters by integrating the water treatment flow, the ultraviolet transmittance, the ultraviolet irradiation probe indication and the effective ultraviolet dose data set recorded during the reactor dose verification, and calculate the corresponding effective ultraviolet dose according to the real-time monitoring data of the reactor in actual operation. The first method only needs to pay attention to the indication of the wall irradiation probe, is relatively simple to operate, can only obtain the relative size of the ultraviolet reactor dose under partial fixed flow, and can evaluate few working conditions and cannot quantify the working conditions. The second method needs to synchronously provide the water treatment flow rate, the ultraviolet transmittance and the irradiation probe reading of the ultraviolet reactor, and the correspondingly established ultraviolet dose empirical formula has good applicability to different water quality and water quantity conditions and obtains a specific dose value. However, this method involves a large amount of monitoring data and is relatively complicated in operation.
In addition, the two existing methods are based on field dose verification of the ultraviolet reactor, depend on a large number of time-consuming and labor-consuming biological experiments, are high in cost, and do not consider possible changes of the output power of the ultraviolet light source in the operation process of the ultraviolet reactor.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a method and a system for monitoring key operating parameters of an ultraviolet reactor, which take the calculation application of incident photon flow and optical path length as the core, and can realize low-cost monitoring of the average dose of the ultraviolet reactor and the output power of an ultraviolet light source in actual operation.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a method for monitoring key operating parameters of an ultraviolet reactor, comprising the steps of:
obtaining incident photon flow q and optical path length d of the ultraviolet reactor;
obtaining corrected incident photon flow q according to the incident photon flow q and the data of the wall surface irradiation probe of the ultraviolet reactorc；
Obtaining an ultraviolet light source power output coefficient f according to the wall irradiation probe data of the ultraviolet reactor and the ultraviolet transmittance T of the water flow;
correcting incident photon flux q from ultraviolet reactorcPower output coefficient of ultraviolet light sourcef. The ultraviolet transmittance T and the optical path length d of the water flow are used for obtaining the average radiation intensity E of the ultraviolet reactor in actual operationt；
Ultraviolet reactor based treatment water flow Q and average radiation intensity EtObtaining the average ultraviolet dose F of the ultraviolet reactor in actual operationt。
Further, the process of obtaining the incident photon flux q and the optical path length d of the ultraviolet reactor comprises the following steps:
acquiring the structural size and light source information of the ultraviolet reactor;
setting different ultraviolet transmittance T of water flow;
calculating theoretical average radiation intensity E of the corresponding ultraviolet reactor when the ultraviolet transmittance T of the water flow is obtained by utilizing a light intensity distribution modelTAnd then fitting to obtain the incident photon flow q and the optical path length d of the ultraviolet reactor.
Further, the process of obtaining the incident photon flux q and the optical path length d of the ultraviolet reactor by fitting comprises the following steps:
using the formula a ═ log10(1/T) converting the ultraviolet transmittance T of the water flow into ultraviolet absorbance a of the water flow;
using the formula Ep＝ETU will mean theoretical radiation intensity ETConversion to average photon intensity EpU is molar photon energy;
using the formula Ep*a＝q/Vln(10)(1-10-ad) Ultraviolet absorbance a and average photon intensity E to water flowpAnd carrying out nonlinear fitting on the data set, and determining the incident photon flow q and the optical path length d of the ultraviolet reactor, wherein V is the effective volume of the ultraviolet reactor.
Further, a corrected incident photon flux q is obtainedcThe process comprises the following steps:
obtaining the index R of the ultraviolet reactor wall surface irradiation probe under the condition that the T is 99 percent of deionized waterc；
Calculating the radiation intensity E of the wall surface position of the ultraviolet reactor under the same ultraviolet transmittance by adopting a light intensity distribution modelc；
Using the formula qc＝qRc/EcCalculating to obtain corrected incident photon flow qc。
Further, the process of obtaining the power output coefficient f of the ultraviolet light source comprises the following steps:
recording the reading R of the wall surface irradiation probe of the ultraviolet reactor in actual operationwAnd the ultraviolet transmittance T of the water flow;
using the formula Ew＝RcTdCalculating to obtain a theoretical index E of the wall surface irradiation probe when the ultraviolet light source power in the ultraviolet reactor is 100% output under the water flow ultraviolet transmittance Tw；
Using the formula f ═ Rw/EwAnd calculating to obtain the power output coefficient f of the ultraviolet light source in the ultraviolet reactor.
Further, the average radiation intensity E of the ultraviolet reactor in actual operation is obtainedtThe process comprises the following steps:
using the formula Et＝qc f(1-Td) Calculating the average radiation intensity E of the ultraviolet reactor in actual operation by using U/Vln (1/T)tWherein V is the effective volume of the ultraviolet reactor, and U is the molar photon energy.
Further, the average ultraviolet dose F of the ultraviolet reactor in actual operation is obtainedtThe process comprises the following steps:
recording the UV reactor treatment water flow Q, using formula Ft＝EtCalculating to obtain the average ultraviolet dose F of the ultraviolet reactor by V/QtWherein V is the effective volume of the ultraviolet reactor.
In a second aspect, the present invention provides a system for monitoring critical operating parameters of an ultraviolet reactor, the system comprising:
the signal acquisition module includes ultraviolet irradiation probe, ultraviolet transmittance sensor and real-time flowmeter, wherein:
the ultraviolet irradiation probe is arranged on the wall surface of the ultraviolet reactor and is configured to obtain the wall surface irradiation intensity R of the ultraviolet reactor;
the ultraviolet transmittance sensor is arranged at the upstream or the downstream of the ultraviolet reactor and is configured to acquire the ultraviolet transmittance T of the water flow in actual operation;
the real-time flow meter is arranged at the upstream or the downstream of the ultraviolet reactor and is configured to obtain the flow rate Q of the treatment water in actual operation;
a data processing module configured to obtain an average radiation intensity E of the UV reactor in actual operationtAnd average UV dose Ft；
And the display module is configured to display the received data of the signal acquisition module and the data processing module in real time.
Further, the data processing module comprises:
a theoretical average radiation intensity obtaining unit configured to calculate theoretical average radiation intensity E of the ultraviolet reactor with different water flow ultraviolet transmittance T by using a light intensity distribution model based on the structure size of the ultraviolet reactor and the light source informationT；
The incident photon flow and optical path length acquisition unit is configured to obtain incident photon flow q and optical path length d of the ultraviolet reactor through calculation fitting;
a corrected incident photon flow rate unit configured to calculate a corrected incident photon flow rate q of the ultraviolet reactor based on the ultraviolet irradiation data and the light intensity distribution model calculation resultc；
The power output coefficient acquisition unit is configured to acquire an ultraviolet light source power output coefficient f according to the wall irradiation data of the ultraviolet reactor and the ultraviolet transmittance T of the water flow;
an average radiation intensity obtaining unit configured to correct the incident photon flux q based on the ultraviolet reactorcThe power output coefficient f of the ultraviolet light source, the ultraviolet transmittance T of the water flow and the optical path length d to obtain the average radiation intensity E of the ultraviolet reactor in actual operationt；
An average UV dose acquisition unit configured to process the water flow Q and the average radiation intensity E based on a UV reactortObtaining the average ultraviolet dose F of the ultraviolet reactor in actual operationt。
In a third aspect, the present invention also provides a computer storage medium having computer readable instructions stored thereon which are executable by a processor to implement the method of monitoring critical operating parameters of an ultraviolet reactor according to the first aspect of the present invention.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the correlation among the average ultraviolet radiation intensity, the incident photon flow and the optical path length in the ultraviolet reactor is deduced through a theoretical formula, and the real-time monitoring of key operation parameters such as the ultraviolet dose of the reactor can be realized by combining the ultraviolet transmittance and the flow of the water flow, so that a large amount of time-consuming and labor-consuming biological dose experiments are avoided, and the cost is lower and more convenient;
2. according to the invention, the actual power output coefficient of the ultraviolet light source can be determined by comparing the reading of the ultraviolet irradiation probe in actual operation with the theoretical value of 100% output of the ultraviolet light source power under the same water flow ultraviolet transmittance, so that guidance is provided for maintaining the lamp tube of the ultraviolet reactor;
in conclusion, the invention can better assist the development and application of the water treatment ultraviolet technology and can be widely applied to water treatment.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Like reference numerals refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic flow chart of a method for monitoring key operating parameters of an ultraviolet reactor according to an embodiment of the invention;
FIG. 2 shows the non-linear fitting result of the incident photon flux q and the optical path length d of a single-tube UV reactor according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a system for monitoring critical operating parameters of an ultraviolet reactor according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the system for monitoring critical operating parameters of the UV reactor according to the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "upper", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
According to the method and the system for monitoring the key operation parameters of the ultraviolet reactor, the radiation intensity and the optical path length of the reactor are calculated by adopting a light intensity distribution model according to the structure size and the light source information of the ultraviolet reactor, and then the power output coefficient, the average radiation intensity and the average ultraviolet dose of the ultraviolet light source in the ultraviolet reactor are determined by combining the reading of an irradiation probe positioned on the wall surface of the reactor, the ultraviolet transmittance and the flow of water flow. Therefore, the method can realize the determination of the key operation parameters of the ultraviolet reactor, namely the power output coefficient of the ultraviolet light source, the average radiation intensity and the average ultraviolet dose on the premise of avoiding a large amount of time-consuming and labor-consuming biological dose experiments, and provides a convenient and reliable monitoring method for the efficient and safe application of the water treatment ultraviolet technology.
Example 1
As shown in fig. 1, the method for monitoring the key operating parameters of the uv reactor provided in this embodiment includes the following steps:
s1, calculating the incident photon flow q and the optical path length d of the ultraviolet reactor through a light intensity distribution model according to the structural size and the light source information of the target ultraviolet reactor, wherein the specific process is as follows:
s11, acquiring the structure size and light source information of the ultraviolet reactor, wherein the structure size of the ultraviolet reactor comprises parameters such as length, inner diameter and the like, and the light source information comprises parameters such as arc length, power and the like, for example;
s12, setting different water flow ultraviolet transmittances T;
s13, calculating the theoretical average radiation intensity E of the corresponding ultraviolet reactor when the transmittance is T by using the light intensity distribution modelTAnd then fitting to obtain the incident photon flow q and the optical path length d of the ultraviolet reactor, wherein the light intensity distribution model such as a discrete coordinate radiation model and a multi-point light source superposition model can accurately calculate the light intensity distribution in the ultraviolet reactor under different structures and water flow conditions, and the specific calculation process is as follows:
using the formula a ═ log10(1/T) converting the ultraviolet transmittance T of the water flow into ultraviolet absorbance a of the water flow;
using the formula Ep＝ETU will mean theoretical radiation intensity ETConversion to average photon intensity EpU is molar photon energy;
using the formula Ep*a＝q/Vln(10)(1-10-ad) Ultraviolet absorbance a and average photon intensity E to water flowpCarrying out nonlinear fitting on the data set to determine incident photon flow q and light of the ultraviolet reactorThe path length d is shown in the specification, wherein V is the effective volume of the ultraviolet reactor.
S2, comparing the index R of the ultraviolet radiation probe installed on the wall surface of the ultraviolet reactorcAnd light intensity distribution model result EcCalculating to obtain corrected incident photon flow qcThe specific process is as follows:
obtaining the reading R of the ultraviolet reactor wall surface irradiation probe under the condition of filling deionized water (T is 99 percent)c；
Calculating the radiation intensity E of the wall surface position of the ultraviolet reactor under the same ultraviolet transmittance by adopting a light intensity distribution modelc；
Using the formula qc＝qRc/EcCalculating to obtain corrected incident photon flow qc。
S3, reading R according to the ultraviolet radiation probe in actual operationwAnd the ultraviolet transmittance T of the water flow and the theoretical irradiation probe reading E when the power of the ultraviolet light source is 100 percent outputwCalculating to obtain the power output coefficient f of the ultraviolet light source, wherein the specific process is as follows:
recording the reading R of the wall surface irradiation probe of the ultraviolet reactor in actual operationwAnd the ultraviolet transmittance T of the water flow;
using the formula Ew＝RcTdCalculating to obtain a theoretical index E of the wall irradiation probe when the ultraviolet lamp power in the ultraviolet reactor is 100% output under the water flow ultraviolet transmittance TwWherein, TdThe meaning of the parameter (d) is the d power of T, and the final transmittance of the radiation intensity when the optical path length is d is reflected;
using the formula f ═ Rw/EwAnd calculating to obtain the power output coefficient f of the ultraviolet light source in the ultraviolet reactor.
S4, calculating the average radiation intensity E of the ultraviolet reactor in actual operation by combining the parameterstAnd calculating to obtain average ultraviolet dose F by combining with the treatment water flow QtThe specific process is as follows:
using the formula Et＝qc f(1-Td) Calculating the average radiation intensity Et of the ultraviolet reactor in actual operation by using U/Vln (1/T);
recording UV reflectionTreating the water flow Q with the reactor using the formula Ft＝EtCalculating to obtain the average ultraviolet dose F of the ultraviolet reactor by V/Qt。
The method for monitoring the key operation parameters of the ultraviolet reactor based on the embodiment has the specific application process that:
1) and acquiring the structural size and lamp tube information of the target ultraviolet reactor.
The structure size of the target ultraviolet reactor comprises length and inner diameter, and the lamp tube information comprises ultraviolet light source installation position, arc length, power and UVC efficiency;
2) adopting an accurate light intensity distribution model to obtain theoretical average radiation intensity E in the ultraviolet reactor under different water flow ultraviolet transmittances TTPerforming simulation calculation, specifically including T being 50%, 60%, 70%, 80%, 90% and 99%, and calculating to obtain corresponding ETA value;
3) converting the ultraviolet transmittance T of the water flow into ultraviolet absorbance a of the water flow by using a formula a-log 10(1/T), and converting the ultraviolet transmittance T of the water flow into the ultraviolet absorbance a of the water flow by using a formula Ep＝ETU will mean theoretical radiation intensity ETConversion to average photon intensity EpAccording to the law of light intensity distribution Ep*a＝q/Vln(10)(1-10-ad) Carrying out nonlinear fitting on incident photon flow q and optical path length d of the ultraviolet reactor, wherein U is molar photon energy, and V is reactor volume;
4) filling the target ultraviolet reactor with deionized water (the ultraviolet transmittance T of the water flow is about 99 percent), and recording the reading R of the ultraviolet radiation probe at the wall surface at the momentcAnd the theoretical radiant intensity E of the same position when T is 99 percent calculated by combining the light intensity distribution modelcUsing the formula qc＝qRc/EcCalculating to obtain corrected incident photon flow qc；
5) In actual operation, recording the reading R of the ultraviolet radiation probe on the wall surface of the ultraviolet reactorwAnd water flow ultraviolet transmittance T, using formula Ew＝RcTdCalculating to obtain a theoretical index E of the wall surface irradiation probe when the ultraviolet light source power in the ultraviolet reactor is 100% output under the water flow ultraviolet transmittance TwUsing the formula f ═ Rw/EwAnd calculating to obtain the power output coefficient f of the ultraviolet light source in the ultraviolet reactor.
6) Correcting incident photon intensity q of comprehensive ultraviolet reactorcThe power output coefficient f of the ultraviolet light source, the ultraviolet transmittance T of the water flow, the optical path length d and the volume V of the reactor by using a formula Et＝qc f(1-Td) Calculating the average radiation intensity E of the ultraviolet reactor in actual operation by using U/Vln (1/T)t；
7) Recording the UV reactor treatment water flow Q, using formula Ft＝EtCalculating to obtain the average ultraviolet dose F of the ultraviolet reactor by V/Qt。
To further illustrate the method for monitoring the key operating parameters of the uv reactor provided in this embodiment, a specific example of a single-tube uv reactor is described in detail below, and the specific process includes:
1) the length of the single-tube ultraviolet reactor is 500mm, the inner diameter of the single-tube ultraviolet reactor is 110mm, the ultraviolet lamp is arranged at the central axis of the reactor, the arc length of the tube is 356mm, the power of the tube is 21W, and the UVC efficiency is 30%;
2) adopting a corrected discrete coordinate radiation model, synthesizing the parameter information of the ultraviolet reactor, and performing simulation calculation to obtain theoretical average ultraviolet radiation intensity E in the ultraviolet reactor when the ultraviolet transmittance T of the water flow is respectively 50%, 60%, 70%, 80%, 90% and 99%T1.70, 2.19, 2.82, 3.64, 4.69 and 5.87mW cm respectively-2；
3) Converting the ultraviolet transmittance T of the water flow into ultraviolet absorbance a of the water flow by using the formula of (a) log10(1/T), wherein the ultraviolet transmittance T of the water flow corresponds to 0.301, 0.222, 0.155, 0.097, 0.046 and 0.004cm-1；
Using the formula Ep＝ETU will mean theoretical radiation intensity ETConversion to average photon intensity EpCorresponding to 3.61X 10-9、4.65×10-9、5.98×10-9、7.71×10-9、9.94×10-9And 1.25X 10-8Einstein cm-2s-1Wherein, U is 471528J Einstein-1；
According to the law of light intensity distribution Ep*a＝q/Vln(10)(1-10-ad) The incident photon flux q and optical path length d of the ultraviolet reactor were fitted non-linearly, where V is 4.8L, as shown in fig. 2, to obtain q of 1.24 × 10-5Einstein s-1，d＝4.92cm；
4) Filling the ultraviolet reactor with deionized water with ultraviolet transmittance of 99%, starting an ultraviolet lamp to preheat for 15min, and recording the reading R of an ultraviolet irradiation probe installed on the wall surface of the reactorc＝3.13mW cm-2And the theoretical radiation intensity E at the same position calculated by adopting the corrected discrete coordinate radiation modelc＝3.28mW cm-2(ii) a Using the formula qc＝qRc/EcCalculating to obtain corrected incident photon flow qc＝1.18×10-5Einstein s-1；
5) In actual operation, recording the reading R of the ultraviolet radiation probe on the wall surface of the ultraviolet reactor at a certain momentw＝2.30mW
cm-2The ultraviolet transmittance T of the water flow is 95 percent by using a formula Ew＝Rc TdCalculating to obtain a theoretical index E of the wall irradiation probe when the ultraviolet light source power in the ultraviolet reactor is 100% output under the water flow ultraviolet transmittance Tw＝2.43
mW cm-2Using the formula f ═ Rw/EwCalculating to obtain the power output coefficient f of the ultraviolet light source in the ultraviolet reactor to be 0.94;
6) correcting incident photon intensity q of comprehensive ultraviolet reactorcThe power output coefficient f of the ultraviolet light source, the ultraviolet transmittance T of the water flow, the optical path length d and the volume V of the reactor by using a formula Et＝qc f(1-Td) Calculating the average radiation intensity E of the ultraviolet reactor in actual operation by using U/V ln (1/T)t＝4.74mW cm-2；
7) Recording the UV reactor treatment water flow rate Q ═ 0.1L/s using equation Ft＝EtCalculating to obtain the average ultraviolet dose F of the ultraviolet reactor by V/Qt＝227.5mJ cm-2。
Example 2
As shown in fig. 3, the system for monitoring the key operating parameters of the uv reactor provided in this embodiment includes:
the signal acquisition module 1 is used for acquiring parameter information of the operation of the ultraviolet reactor;
a data processing module 2 for obtaining the average radiation intensity E of the ultraviolet reactor in actual operationtAnd average UV dose Ft；
And the display module 3 is used for displaying each parameter in actual operation.
In some implementations of this embodiment, the signal acquisition module 1 includes:
the ultraviolet radiation probe 11 is a conventional probe, is mounted on the wall surface of the ultraviolet reactor through a quartz window, and is used for obtaining the ultraviolet radiation intensity R when T is 99%cAnd the intensity R of the ultraviolet radiation at the wall surface of the reactor in actual operationw；
The ultraviolet transmittance sensor 12 can be installed at the upstream or downstream of the ultraviolet reactor, and is independently installed or adopts data of other online monitors to obtain the ultraviolet transmittance T of the water flow in actual operation;
the real-time flow meter 13 can be arranged at the upstream or the downstream of the ultraviolet reactor, is independently arranged or adopts the data of other on-line monitors and is used for acquiring the treatment water flow Q in actual operation;
in some implementations of this embodiment, the data processing process of the data processing module 2 is as follows:
the theoretical average radiation intensity acquisition unit is configured to calculate theoretical average radiation intensity ET of the ultraviolet reactor with different water flow ultraviolet transmittance T by using a light intensity distribution model based on the structural size of the ultraviolet reactor and light source information;
the incident photon flow and optical path length acquisition unit is configured to obtain incident photon flow q and optical path length d of the ultraviolet reactor through calculation fitting;
a corrected incident photon flow rate unit configured to calculate a corrected incident photon flow rate q of the ultraviolet reactor based on the ultraviolet irradiation data and the light intensity distribution model calculation resultc；
The power output coefficient acquisition unit is configured to acquire an ultraviolet light source power output coefficient f according to the wall irradiation data of the ultraviolet reactor and the ultraviolet transmittance T of the water flow;
an average radiation intensity obtaining unit configured to correct the incident photon flux q based on the ultraviolet reactorcThe power output coefficient f of the ultraviolet light source, the ultraviolet transmittance T of the water flow and the optical path length d to obtain the average radiation intensity E of the ultraviolet reactor in actual operationt；
An average UV dose acquisition unit configured to process the water flow Q and the average radiation intensity E based on a UV reactortObtaining the average ultraviolet dose F of the ultraviolet reactor in actual operationt。
It should be noted that, since the data processing process of the data processing module in this embodiment is substantially similar to the data processing process in method embodiment 1, the description process in this embodiment is relatively simple, and reference may be made to part of the description in embodiment 1 for relevant points.
In some implementations of this embodiment, the display module 3 may be a liquid crystal display, and is configured to receive and display the parameter results of the signal acquisition module 1 and the data processing module 3 in real time, and meanwhile, may also perform parameter input and control through a control keyboard and the like. The content displayed by the display module 3 includes: display of ultraviolet light source power and correction of incident photon flux qcAnd optical path length d; displaying the reading R of the irradiation probe in actual operationwWater flow ultraviolet transmittance T and treatment water flow Q; displaying the power output coefficient f and the average radiation intensity E of the ultraviolet light source in actual operationtAnd average UV dose FtFor example, it is not described herein.
Example 3
The method of monitoring critical operating parameters of the uv reactor of this example 1 may be embodied as a computer program product, which may include a computer readable storage medium having computer readable program instructions embodied therein for performing the method of this example 1.
The computer readable storage medium may be a tangible device that retains and stores instructions for use by an instruction execution device. The computer readable storage medium may be, for example, but not limited to, an electronic memory device, a magnetic memory device, an optical memory device, an electromagnetic memory device, a semiconductor memory device, or any combination of the foregoing.
It should be noted that the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. Each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims. The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application should be defined by the claims.
Claims (10)
1. A method for monitoring key operating parameters of an ultraviolet reactor is characterized by comprising the following steps:
obtaining incident photon flow q and optical path length d of the ultraviolet reactor;
obtaining corrected incident photon flow q according to the incident photon flow q and the data of the wall surface irradiation probe of the ultraviolet reactorc；
Obtaining an ultraviolet light source power output coefficient f according to the wall irradiation probe data of the ultraviolet reactor and the ultraviolet transmittance T of the water flow;
correcting incident photon flux q from ultraviolet reactorcThe power output coefficient f of the ultraviolet light source, the ultraviolet transmittance T of the water flow and the optical path length d to obtain the average radiation intensity E of the ultraviolet reactor in actual operationt；
Ultraviolet reactor based treatment water flow Q and average radiation intensity EtObtaining the average ultraviolet dose F of the ultraviolet reactor in actual operationt。
2. The method of claim 1, wherein the step of obtaining the incident photon flux q and the optical path length d of the uv reactor comprises:
acquiring the structural size and light source information of the ultraviolet reactor;
setting different ultraviolet transmittance T of water flow;
calculating theoretical average radiation intensity E of the corresponding ultraviolet reactor when the ultraviolet transmittance T of the water flow is obtained by utilizing a light intensity distribution modelTAnd then fitting to obtain the incident photon flow q and the optical path length d of the ultraviolet reactor.
3. The method of claim 2, wherein the step of fitting the incident photon flux q and the optical path length d of the uv reactor comprises:
using the formula a ═ log10(1/T) converting the ultraviolet transmittance T of the water flow into ultraviolet absorbance a of the water flow;
using the formula Ep＝ETU will mean theoretical radiation intensity ETConversion to average photon intensity EpU is molar photon energy;
using the formula Ep*a＝q/Vln(10)(1-10-ad) Ultraviolet absorbance a and average photon intensity E to water flowpAnd carrying out nonlinear fitting on the data set, and determining the incident photon flow q and the optical path length d of the ultraviolet reactor, wherein V is the effective volume of the ultraviolet reactor.
4. Monitoring uv-light according to claim 1Method for obtaining key operating parameters of a reactor, characterized in that the corrected incident photon flux q is obtainedcThe process comprises the following steps:
obtaining the index R of the ultraviolet reactor wall surface irradiation probe under the condition that the T is 99 percent of deionized waterc；
Calculating the radiation intensity E of the wall surface position of the ultraviolet reactor under the same ultraviolet transmittance by adopting a light intensity distribution modelc；
Using the formula qc＝qRc/EcCalculating to obtain corrected incident photon flow qc。
5. The method of claim 1, wherein obtaining the uv light source power output coefficient f comprises:
recording the reading R of the wall surface irradiation probe of the ultraviolet reactor in actual operationwAnd the ultraviolet transmittance T of the water flow;
using the formula Ew＝RcTdCalculating to obtain a theoretical index E of the wall surface irradiation probe when the ultraviolet light source power in the ultraviolet reactor is 100% output under the water flow ultraviolet transmittance Tw；
Using the formula f ═ Rw/EwAnd calculating to obtain the power output coefficient f of the ultraviolet light source in the ultraviolet reactor.
6. Method for monitoring key operating parameters of UV reactor according to any of claims 1 to 5, characterized in that the average radiation intensity E of the UV reactor in actual operation is obtainedtThe process comprises the following steps:
using the formula Et＝qcf(1-Td) Calculating the average radiation intensity E of the ultraviolet reactor in actual operation by using U/Vln (1/T)tWherein V is the effective volume of the ultraviolet reactor, and U is the molar photon energy.
7. The method for monitoring key operating parameters of an ultraviolet reactor as claimed in any one of claims 1 to 5, wherein the actual operating average ultraviolet reactor level is obtainedDose of UVtThe process comprises the following steps:
recording the UV reactor treatment water flow Q, using formula Ft＝EtCalculating to obtain the average ultraviolet dose F of the ultraviolet reactor by V/QtWherein V is the effective volume of the ultraviolet reactor.
8. A system for monitoring critical operating parameters of an ultraviolet reactor, the system comprising:
the signal acquisition module includes ultraviolet irradiation probe, ultraviolet transmittance sensor and real-time flowmeter, wherein:
the ultraviolet irradiation probe is arranged on the wall surface of the ultraviolet reactor and is configured to obtain the wall surface irradiation intensity R of the ultraviolet reactor;
the ultraviolet transmittance sensor is arranged at the upstream or the downstream of the ultraviolet reactor and is configured to acquire the ultraviolet transmittance T of the water flow in actual operation;
the real-time flow meter is arranged at the upstream or the downstream of the ultraviolet reactor and is configured to obtain the flow rate Q of the treatment water in actual operation;
a data processing module configured to obtain an average radiation intensity E of the UV reactor in actual operationtAnd average UV dose Ft；
And the display module is configured to display the received data of the signal acquisition module and the data processing module in real time.
9. The system for monitoring critical operating parameters of an ultraviolet reactor of claim 8, wherein the data processing module comprises:
a theoretical average radiation intensity obtaining unit configured to calculate theoretical average radiation intensity E of the ultraviolet reactor with different water flow ultraviolet transmittance T by using a light intensity distribution model based on the structure size of the ultraviolet reactor and the light source informationT；
The incident photon flow and optical path length acquisition unit is configured to obtain incident photon flow q and optical path length d of the ultraviolet reactor through calculation fitting;
a corrected incident photon flow rate unit configured to calculate a corrected incident photon flow rate q of the ultraviolet reactor based on the ultraviolet irradiation data and the light intensity distribution model calculation resultc；
The power output coefficient acquisition unit is configured to acquire an ultraviolet light source power output coefficient f according to the wall irradiation data of the ultraviolet reactor and the ultraviolet transmittance T of the water flow;
an average radiation intensity obtaining unit configured to correct the incident photon flux q based on the ultraviolet reactorcThe power output coefficient f of the ultraviolet light source, the ultraviolet transmittance T of the water flow and the optical path length d to obtain the average radiation intensity E of the ultraviolet reactor in actual operationt；
An average UV dose acquisition unit configured to process the water flow Q and the average radiation intensity E based on a UV reactortObtaining the average ultraviolet dose F of the ultraviolet reactor in actual operationt。
10. A computer storage medium having computer readable instructions stored thereon which are executable by a processor to perform the method of monitoring critical operating parameters of an ultraviolet reactor of any one of claims 1 to 7.
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