CN112986072A - Pollution source odor online monitoring system and method - Google Patents

Pollution source odor online monitoring system and method Download PDF

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CN112986072A
CN112986072A CN202110179483.6A CN202110179483A CN112986072A CN 112986072 A CN112986072 A CN 112986072A CN 202110179483 A CN202110179483 A CN 202110179483A CN 112986072 A CN112986072 A CN 112986072A
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pollution source
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CN112986072B (en
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张明成
党睿
雷霄
陆彬
徐冬亮
宋晓军
冯渊超
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Shanghai Ensky Green Technology Co ltd
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Abstract

The invention provides an online monitoring system and method for pollution source odor, which can determine the range of a pollution source odor detection area according to the wind speed state of a target area, collecting and analyzing a plurality of air samples at a plurality of different positions in the range of the odor detection area of the pollution source, determining the odor concentration grade of each air sample according to the types and concentrations of organic matter particles obtained by analysis, so as to divide the odor detection area range of the pollution source into a plurality of subareas with different odor grades, and finally, carrying out vacuum-pumping adsorption operation or sprinkling operation with different modes on the odor grade areas, therefore, the content of organic particles in the odor grade subregion is reduced, so that the odor formed by the waste gas emitted by the pollution source can be quantitatively monitored, and targeted odor elimination treatment is performed on different regions corresponding to the industrial park.

Description

Pollution source odor online monitoring system and method
Technical Field
The invention relates to the technical field of environmental pollution monitoring, in particular to an online monitoring system and method for pollution source odor.
Background
Industrial parks, in particular those producing food or chemical fertilizers, emit a large amount of waste gases during their production, which contain organic particles that float and diffuse in the atmosphere, which is accompanied by the spread of odors during their spreading, since these organic particles are usually organic substances containing amine groups. The prior art can only monitor to the exhaust emission volume in industrial park, and it can't carry out the monitoring of quantization to the foul smell that the waste gas that the pollution source discharged formed to can't correspond different regions to the industrial park and carry out corresponding foul smell elimination treatment, this seriously influences the comprehensiveness and the accuracy of monitoring the foul smell of pollution source, also does not do benefit to effectively to improve simultaneously and to industrial park air circumstance comfort level.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an online monitoring system and a method for odor of a pollution source, which comprises the steps of recording wind speed data corresponding to a target area, simultaneously determining the maximum diffusion transmission distance of pollution particles from the pollution source according to the wind speed data, determining the range of an odor detection area of the pollution source according to the maximum transmission distance, collecting a plurality of air samples at a plurality of different positions in the range of the odor detection area of the pollution source, analyzing each air sample to obtain the type and the concentration of organic matter particles contained in each air sample, determining the odor concentration grade of each air sample according to the type and the concentration of the organic matter particles, dividing the range of the odor detection area of the pollution source into a plurality of subareas with different odor grades according to the odor concentration grade, and finally dividing each subarea with different odor grades according to the odor concentration grade of each subarea, carrying out vacuum-pumping adsorption operation or sprinkling operation in different modes on the odor grade area, so as to reduce the content of organic particulate matters in the odor grade area; therefore, the online monitoring system and the online monitoring method for the odor of the pollution source can determine the range of a detection area of the odor of the pollution source according to the wind speed state of a target area, collect and analyze a plurality of air samples at a plurality of different positions in the range of the detection area of the odor of the pollution source, determine the odor concentration grade of each air sample according to the type and concentration of organic matter particles obtained by analysis, divide the range of the detection area of the odor of the pollution source into a plurality of subareas with different odor grades, and finally perform vacuumizing adsorption operation or water spraying operation in different modes on the subareas with the odor grades so as to reduce the content of organic particles in the subareas with the odor grades, so that the odor formed by waste gas discharged by the pollution source can be quantitatively monitored, and targeted odor elimination treatment can be performed on different areas corresponding to an industrial park.
The invention provides an online monitoring system for odor of a pollution source, which is characterized by comprising a pollution source detection area range determining module, an air sample collecting module, an air sample analyzing module, an odor grade subregion dividing module and an odor grade subregion purifying processing module; wherein the content of the first and second substances,
the pollution source detection area range determining module is used for recording wind speed data corresponding to a target area, determining the maximum diffusion transmission distance of pollution particles from a pollution source according to the wind speed data, and determining the pollution source odor detection area range according to the maximum transmission distance;
the air sample collection module is used for collecting a plurality of air samples at a plurality of different positions in the range of the pollution source odor detection area;
the air sample analysis module is used for analyzing each air sample so as to obtain the type and concentration of organic particles contained in each air sample;
the odor grade subregion dividing module is used for determining the odor concentration grade of each air sample according to the type and the concentration of the organic matter particles, and dividing the pollution source odor detection region range into a plurality of different odor grade subregions according to the odor concentration grade;
the odor grade subregion purification treatment module is used for carrying out vacuumizing adsorption operation or sprinkling operation in different modes on the odor grade subregion according to the respective odor concentration grade of each odor grade subregion, so that the content of organic particulate matters in the odor grade subregion is reduced;
further, the determining module for the pollution source detection area range records wind speed data corresponding to a target area, determines the maximum diffusion transmission distance of pollution particles from a pollution source according to the wind speed data, and determines the pollution source odor detection area range according to the maximum transmission distance, specifically comprising:
recording wind speed change data of a target area in a preset time period, and performing statistical analysis on the wind speed change data so as to determine an average wind speed value of the target area in the preset time period;
projecting visible light to the pollutant particle set discharged by the pollutant source, recording a scattering spectrum of the pollutant particle set after scattering the projected visible light, determining the average particle size of the pollutant particles discharged by the pollutant source according to the scattering light wavelength and the scattering light intensity of the scattering spectrum, and determining the maximum diffusion transmission distance of the pollutant particles in the external environment according to the average wind speed value and the average particle size;
and the number of the first and second groups,
the air sample collection module collects a plurality of air samples at a plurality of different positions in the pollution source odor detection area range, and the air sample collection module specifically comprises:
taking the position of the pollution source as the center of a circle and the area range formed by taking the maximum diffusion transmission distance as the radius as the pollution source odor detection area range, and collecting a plurality of air samples at the circumferential positions of concentric circles with different radii in the pollution source odor detection area range;
further, the analyzing module for analyzing each air sample to obtain the type and concentration of the organic particles contained in each air sample specifically includes:
performing fluorescence spectrum analysis on each air sample to obtain the type and concentration of organic particles contained in each air sample;
and the number of the first and second groups,
the odor grade subregion divides the module according to the kind and the concentration of organic matter granule, confirms the foul smell concentration level of every air sample, again according to foul smell concentration level, will the regional scope of pollution source foul smell detection divides into a plurality of different odor grade subregions and specifically includes:
determining the actual concentration ratio of organic particles containing amino groups in the organic particles according to the types and concentrations of the organic particles, and determining the odor concentration grade of each air sample according to the actual concentration ratio, wherein when the actual concentration ratio is higher, the odor concentration grade of the corresponding air sample is also higher;
according to the odor concentration level of each air sample, correspondingly dividing the acquisition area corresponding to each air sample in the pollution source odor detection area into odor level sub-areas with different odor concentration levels;
further, the sub-region of odor grade purifies processing module according to each respective foul smell concentration grade of each sub-region of odor grade, carries out the evacuation of different modes absorption operation or the watering operation of different modes to the region of odor grade to reduce the sub-region of odor grade organic particulate matter content specifically includes:
comparing the odor concentration grade of each odor grade subregion with a preset concentration grade threshold, and if the odor concentration grade exceeds the preset concentration grade threshold, determining the corresponding odor grade subregion as an area needing purification treatment; otherwise, determining the corresponding odor grade subregion as a region which does not need to be purified;
and judging whether the area coverage area corresponding to the area needing to be purified is larger than a preset area threshold value, if so, increasing the vacuumizing power for vacuumizing and adsorbing the area needing to be purified or increasing the water spraying amount for spraying the area needing to be purified.
The invention also provides an online monitoring method of the odor of the pollution source, which is characterized by comprising the following steps:
step S1, recording wind speed data corresponding to a target area, determining the maximum diffusion transmission distance of pollution particles from a pollution source according to the wind speed data, determining the detection area range of the odor of the pollution source according to the maximum transmission distance, and collecting a plurality of air samples at a plurality of different positions in the detection area range of the odor of the pollution source;
step S2, analyzing each air sample to obtain the type and concentration of organic particles contained in each air sample, determining the odor concentration grade of each air sample according to the type and concentration of the organic particles, and dividing the pollution source odor detection area range into a plurality of different odor grade sub-areas according to the odor concentration grade;
step S3, according to the odor concentration grade of each odor grade subregion, carrying out different modes of vacuum suction operation or different modes of water spraying operation on the odor grade subregion, thereby reducing the organic particulate matter content of the odor grade subregion;
further, in step S1, recording wind speed data corresponding to the target area, determining a maximum diffusion transport distance of pollution particles from the pollution source according to the wind speed data, determining a pollution source odor detection area range according to the maximum transport distance, and collecting a plurality of air samples at a plurality of different positions in the pollution source odor detection area range specifically includes:
step S101, recording wind speed change data of a target area in a preset time period, and performing statistical analysis on the wind speed change data to determine an average wind speed value of the target area in the preset time period;
step S102, projecting visible light to a pollutant particle set discharged by the pollutant source, simultaneously recording a scattering spectrum of the pollutant particle set after scattering the projected visible light, determining the average particle size of the pollutant particles discharged by the pollutant source according to the scattering light wavelength and the scattering light intensity of the scattering spectrum, and determining the maximum diffusion transmission distance of the pollutant particles in the external environment according to the average wind speed value and the average particle size;
step S103, taking the position of the pollution source as the center of a circle and taking the maximum diffusion transmission distance as the radius to form an area range as the pollution source odor detection area range, and collecting a plurality of air samples at the circumferential positions of concentric circles with different radii in the pollution source odor detection area range;
further, in step S2, analyzing each air sample to obtain the type and concentration of organic particles contained in each air sample, determining the odor concentration level of each air sample according to the type and concentration of the organic particles, and dividing the pollution source odor detection area range into a plurality of different odor level sub-areas according to the odor concentration level specifically includes:
step S201, performing fluorescence spectrum analysis on each air sample to obtain the type and concentration of organic particles contained in each air sample;
step S202, determining the actual concentration ratio of the organic particles containing amino groups in the organic particles according to the types and concentrations of the organic particles, and determining the odor concentration grade of each air sample according to the actual concentration ratio, wherein when the actual concentration ratio is higher, the odor concentration grade of the corresponding air sample is also higher;
step S203, according to the odor concentration level of each air sample, correspondingly dividing the collection area corresponding to each air sample in the pollution source odor detection area into odor level sub-areas with different odor concentration levels;
further, in the step S3, performing different modes of vacuum suction operation or different modes of water spraying operation on the odor grade region according to the odor concentration level of each odor grade subregion, so as to reduce the content of the organic particulate matters in the odor grade subregion specifically includes:
step S301, comparing the odor concentration grade of each odor grade subregion with a preset concentration grade threshold, and if the odor concentration grade exceeds the preset concentration grade threshold, determining the corresponding odor grade subregion as a region to be purified; otherwise, determining the corresponding odor grade subregion as a region which does not need to be purified;
step S302, judging whether the area coverage area corresponding to the area needing to be purified is larger than a preset area threshold value, if so, increasing the vacuumizing power for vacuumizing and adsorbing the area needing to be purified or increasing the water sprinkling amount for sprinkling the area needing to be purified;
further, in step S302, the specific determination process of increasing the vacuuming power corresponding to the vacuuming power for performing the vacuuming adsorption operation on the area to be purified and increasing the watering amount corresponding to the watering amount for performing the watering operation on the area to be purified is as follows:
step S3021, screening the odor grade sub-area according to a preset odor concentration grade threshold value by using the following formula (1), and determining the screened odor grade sub-area as an area needing purification treatment according to the odor concentration grade:
Figure BDA0002941024380000061
in the above formula (1), PaRepresenting the decision ranking value, C, corresponding to the a-th odor class sub-regionaIndicates the odor concentration grade corresponding to the a-th odor grade subregion, Ca+i+1Represents the odor concentration grade corresponding to the sub-area of the a + i +1 th odor grade, C represents the preset odor concentration grade threshold, n represents the total number of the sub-areas of the odor grade, u () represents a step function and includesWhen the value in the sign is greater than or equal to 0, the function value of the step function is 1, and when the value in the parenthesis is less than 0, the function value of the step function is 0;
when P is presentaWhen the odor level is 0, the first odor level sub-area is lower than a preset odor concentration level threshold, and the corresponding first odor level sub-area is determined as an area which does not need to be purified;
when P is presentaWhen not equal to 0, the first odor grade sub-area is equal to or larger than a preset odor concentration grade threshold value, the corresponding first odor grade sub-area is determined as the area needing to be purified, and PaThe value of (a) is the rank-ordering value of the odor concentration levels of the a-th odor level sub-area in all the odor concentration levels of the area needing to be purified, PaThe larger the value of (a) indicates the higher the odor concentration level in the sub-area of the a-th odor level;
step S3022, combining the areas of all the regions to be purified having the same determination rank value by using the following formula (2), so as to obtain the total area of all the regions to be purified having the same determination rank value:
Figure BDA0002941024380000071
in the above-mentioned formula (2),
Figure BDA0002941024380000072
indicates the total area of all areas to be decontaminated having the same rank order value as the sub-area of the a-th odor concentration level, Sa+i+1Denotes the area of the sub-region of the a + i +1 th odor class, Pa+i+1The judgment ordering value of the a + i +1 th odor grade sub-region is represented, delta () represents a unit impulse function, when the value in the bracket is equal to 0, the function value of the unit impulse function is 1, and when the value in the bracket is not equal to 0, the function value of the unit impulse function is 0;
step S3023, using the following formula (3) in combination with the total area of all the regions to be decontaminated
Figure BDA0002941024380000073
Determining the amount of increase in the evacuation power and the amount of increase in the watering:
Figure BDA0002941024380000074
in the above formula (3), Δ paIndicates the amount of increase in vacuum power, Δ w, corresponding to the sub-region of the a-th odor concentration levelaIndicating the amount of increased water spray corresponding to the sub-area of the a-th odor concentration level,
Figure BDA0002941024380000075
represents a preset area region and takes the value of 0.5m2～0.8m2，paThe standard vacuum pumping power value corresponding to the area equal to the range of the preset area is represented, and the value of the standard vacuum pumping power value is 200-800 kw, waThe corresponding standard water spraying amount in the range with the area equal to the preset area is expressed, and the value of the standard water spraying amount is 0.5m3-0.8m3；
Further, in step S103, taking a region range formed by taking the position of the pollution source as a center of a circle and taking the maximum diffusion transmission distance as a radius as a pollution source odor detection region range specifically includes:
a plane rectangular coordinate system is established by taking a pollution source as a dot, taking the wind speed direction as the positive direction of an X axis and taking any direction perpendicular to the wind speed direction as the positive direction of a Y axis, and then the following relational expression (4) between the diffusion concentration of the pollution source and the coordinate position of any point in the coordinate system is obtained by establishing a Gaussian distribution model:
Figure BDA0002941024380000081
in the above equation (4), Q (x, y) represents the diffusion concentration of the contamination source at the position where the coordinate point is (x, y) in the coordinate system, VxRepresents the release speed (for example, in m/s) of the odor from the pollution source along the X-axis direction, and Q represents the total amount of the odor from the pollution source (for exampleE.g. in mg), VfRepresenting a current wind speed value (for example in m/s), λ represents a diffusion coefficient, which is related to a coordinate value X corresponding to a coordinate point in a coordinate system on the X-axis, where π represents a circumferential ratio, X represents a position coordinate on the X-axis at a distance X along the direction of the wind speed, and Y represents a position coordinate on the Y-axis at a distance Y along the direction of the absence of wind;
let Q (x, y) be ρkWhere ρ iskRepresenting the concentration value of nitrogen in the current air environment (for example, the unit is mg/m3), and changing the formula Q (x, y) into rhokPerforming simultaneous solution with the above formula (4) to obtain corresponding coordinate values of a plurality of (x, y), wherein the obtained corresponding coordinate values of the plurality of (x, y) are edge coordinate points, and selecting one of the edge coordinate points
Figure BDA0002941024380000083
The maximum value is the maximum transmission distance, and the area enclosed by the edge coordinate points is the pollution source odor detection area.
Compared with the prior art, the online monitoring system and the online monitoring method for the odor of the pollution source determine the maximum diffusion transmission distance of pollution particles from the pollution source according to the wind speed data by recording the wind speed data corresponding to the target area, determine the range of the odor detection area of the pollution source according to the maximum transmission distance, collect a plurality of air samples at a plurality of different positions in the range of the odor detection area of the pollution source, analyze each air sample to obtain the type and the concentration of organic particles contained in each air sample, determine the odor concentration grade of each air sample according to the type and the concentration of the organic particles, divide the range of the odor detection area of the pollution source into a plurality of different odor grade sub-areas according to the odor concentration grade, and finally divide the odor concentration grade of each odor grade sub-area into different odor grade sub-areas according to the odor concentration grade of each odor grade sub-area, carrying out vacuum-pumping adsorption operation or sprinkling operation in different modes on the odor grade area, so as to reduce the content of organic particulate matters in the odor grade area; therefore, the online monitoring system and the online monitoring method for the odor of the pollution source can determine the range of a detection area of the odor of the pollution source according to the wind speed state of a target area, collect and analyze a plurality of air samples at a plurality of different positions in the range of the detection area of the odor of the pollution source, determine the odor concentration grade of each air sample according to the type and concentration of organic matter particles obtained by analysis, divide the range of the detection area of the odor of the pollution source into a plurality of subareas with different odor grades, and finally perform vacuumizing adsorption operation or water spraying operation in different modes on the subareas with the odor grades so as to reduce the content of organic particles in the subareas with the odor grades, so that the odor formed by waste gas discharged by the pollution source can be quantitatively monitored, and targeted odor elimination treatment can be performed on different areas corresponding to an industrial park.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an online pollution source odor monitoring system provided by the invention.
Fig. 2 is a schematic flow chart of the online monitoring method for pollution source odor provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a schematic structural diagram of an online pollution source odor monitoring system according to an embodiment of the present invention is shown. The online monitoring system for the odor of the pollution source comprises a pollution source detection area range determining module, an air sample collecting module, an air sample analyzing module, an odor grade subregion dividing module and an odor grade subregion purifying processing module; wherein the content of the first and second substances,
the pollution source detection area range determining module is used for recording wind speed data corresponding to a target area, determining the maximum diffusion transmission distance of pollution particles from a pollution source according to the wind speed data, and determining the pollution source odor detection area range according to the maximum transmission distance;
the air sample collection module is used for collecting a plurality of air samples at a plurality of different positions in the range of the pollution source odor detection area;
the air sample analysis module is used for analyzing each air sample so as to obtain the type and concentration of organic particles contained in each air sample;
the odor grade subregion dividing module is used for determining the odor concentration grade of each air sample according to the type and the concentration of the organic matter particles, and dividing the pollution source odor detection region range into a plurality of different odor grade subregions according to the odor concentration grade;
the odor grade subregion purification treatment module is used for carrying out vacuumizing adsorption operation or sprinkling operation in different modes on the odor grade region according to the respective odor concentration grade of each odor grade subregion, so that the content of organic particulate matters in the odor grade subregion is reduced.
The beneficial effects of the above technical scheme are: the online monitoring system for the odor of the dye source can determine the range of an odor detection area of the pollution source according to the wind speed state of a target area, collect and analyze a plurality of air samples at a plurality of different positions in the range of the odor detection area of the pollution source, determine the odor concentration level of each air sample according to the type and concentration of organic matter particles obtained by analysis, divide the range of the odor detection area of the pollution source into a plurality of subareas with different odor levels, and finally perform vacuumizing adsorption operation or sprinkling operation in different modes on the subareas with different odor levels, so as to reduce the content of organic particles in the subareas with odor levels.
Preferably, the determining module for the detection area range of the pollution source records wind speed data corresponding to a target area, determines the maximum diffusion transmission distance of pollution particles from the pollution source according to the wind speed data, and determines the detection area range of the pollution source odor according to the maximum transmission distance, specifically including:
recording the wind speed change data of a target area in a preset time period, and performing statistical analysis on the wind speed change data so as to determine the average wind speed value of the target area in the preset time period;
projecting visible light to the pollutant particle set discharged by the pollutant source, recording a scattering spectrum of the pollutant particle set after scattering the projected visible light, determining the average particle size of the pollutant particles discharged by the pollutant source according to the scattering light wavelength and the scattering light intensity of the scattering spectrum, and determining the maximum diffusion transmission distance of the pollutant particles in the external environment according to the average wind speed value and the average particle size;
and the number of the first and second groups,
the collecting of a plurality of air samples by the air sample collecting module at a plurality of different positions in the range of the odor detection area of the pollution source specifically comprises:
and taking the area range formed by taking the position of the pollution source as the center of a circle and the maximum diffusion transmission distance as the radius as the pollution source odor detection area range, and collecting a plurality of air samples at the circumferential positions of concentric circles with different radii in the pollution source odor detection area range.
The beneficial effects of the above technical scheme are: because the pollution particles that the pollution source discharged can carry out diffusion propagation under the drive of atmospheric air current, and the wind speed in the external environment directly determines the maximum distance that the pollution particles can diffuse propagation in atmospheric environment, and the particle diameter of pollution particles self can also influence the diffusion propagation distance of pollution particles simultaneously. By collecting and recording the wind speed change data of the target area and carrying out statistical analysis, the corresponding average wind speed value can be accurately determined, thereby providing a reliable basis for determining the diffusion and propagation distance of the pollution particles. In addition, since the particle size of the pollution particles is usually small, the average particle size of the pollution particles is directly measured by the pollution in the prior art, but the wavelength and intensity of scattered light of the visible light by the micro particles are determined by the average particle size of the micro particles according to the mie scattering effect of the micro particles on the visible light, so that the average particle size of the pollution particles in the east is accurately and quickly determined by recording the corresponding scattering spectrum and combining the mie scattering effect mode. And finally, collecting a plurality of air samples at the circumferential positions of the concentric circles with different radiuses in the range of the pollution source odor detection area, so that the acquisition confidence of the air samples can be improved.
Preferably, the air sample analysis module is configured to analyze each air sample, and the obtaining of the type and concentration of the organic particles contained in each air sample specifically includes:
performing fluorescence spectrum analysis on each air sample to obtain the type and concentration of organic particles contained in each air sample;
and the number of the first and second groups,
the odor grade subregion division module determines the odor concentration grade of each air sample according to the type and the concentration of the organic matter particles, and divides the pollution source odor detection region range into a plurality of different odor grade subregions according to the odor concentration grade, wherein the different odor grade subregions specifically comprise:
determining the actual concentration ratio of the organic particles containing amino groups in the organic particles according to the types and the concentrations of the organic particles, and determining the odor concentration grade of each air sample according to the actual concentration ratio, wherein when the actual concentration ratio is higher, the odor concentration grade of the corresponding air sample is also higher;
and correspondingly dividing the acquisition area corresponding to each air sample in the range of the odor detection area of the pollution source into odor grade sub-areas with different odor concentration levels according to the odor concentration level of each air sample.
The beneficial effects of the above technical scheme are: since the fluorescence peak wavelengths of the fluorescence spectra of different organic particles are different, the type and concentration of the organic particles contained in the air sample can be comprehensively and accurately determined by performing fluorescence spectrum analysis on the air sample. Because the organic particles containing the amino groups generally generate odor, when the concentration of the organic particles containing the amino groups is higher, the corresponding odor grade is higher, so that the odor concentration grade of the air sample can be quantitatively evaluated by determining the actual concentration ratio of the organic particles containing the amino groups in the organic particles, and the collection area corresponding to each air sample can be correspondingly divided into odor grade sub-areas with different odor concentration grades conveniently and accurately.
Preferably, the odor grade sub-region purification treatment module performs different modes of vacuum suction operation or different modes of water spraying operation on the odor grade region according to the respective odor concentration grade of each odor grade sub-region, so as to reduce the content of organic particulate matters in the odor grade sub-region specifically comprises:
comparing the odor concentration grade of each odor grade subregion with a preset concentration grade threshold, and if the odor concentration grade exceeds the preset concentration grade threshold, determining the corresponding odor grade subregion as a region needing to be purified; otherwise, determining the corresponding odor grade subregion as a region which does not need to be purified;
and judging whether the area coverage area corresponding to the area needing to be purified is larger than a preset area threshold value, if so, increasing the vacuumizing power for vacuumizing and adsorbing the area needing to be purified or increasing the water sprinkling amount for sprinkling the area needing to be purified.
The beneficial effects of the above technical scheme are: the method comprises the steps of determining an area needing to be purified and carrying out vacuum-pumping adsorption operation or water spraying operation according to the coverage area of the area needing to be purified by means of threshold value comparison, and increasing the vacuum-pumping power for carrying out the vacuum-pumping adsorption operation on the area needing to be purified or increasing the water spraying amount for carrying out the water spraying operation on the area needing to be purified when the coverage area is larger, so that organic particles floating in the air can be rapidly collected or settled, and the odor grade of the corresponding area is reduced to the maximum extent.
Referring to fig. 2, a flow chart of the online monitoring method for odor of a pollution source according to the embodiment of the present invention is schematically shown. The online monitoring method for the odor of the pollution source comprises the following steps:
step S1, recording wind speed data corresponding to the target area, determining the maximum diffusion transmission distance of pollution particles from a pollution source according to the wind speed data, determining the detection area range of the odor of the pollution source according to the maximum transmission distance, and collecting a plurality of air samples at a plurality of different positions in the detection area range of the odor of the pollution source;
step S2, analyzing each air sample to obtain the type and concentration of organic particles contained in each air sample, determining the odor concentration grade of each air sample according to the type and concentration of the organic particles, and dividing the pollution source odor detection area range into a plurality of different odor grade sub-areas according to the odor concentration grade;
and step S3, according to the odor concentration level of each odor level subregion, carrying out different modes of vacuum suction operation or different modes of water spraying operation on the odor level subregion, thereby reducing the organic particulate matter content of the odor level subregion.
The beneficial effects of the above technical scheme are: the online monitoring method for the odor of the pollution source can determine the range of an odor detection area of the pollution source according to the wind speed state of a target area, collect and analyze a plurality of air samples at a plurality of different positions in the range of the odor detection area of the pollution source, determine the odor concentration grade of each air sample according to the type and concentration of organic matter particles obtained by analysis, divide the range of the odor detection area of the pollution source into a plurality of subareas with different odor grades, and finally perform vacuumizing adsorption operation or sprinkling operation in different modes on the subareas with different odor grades, so as to reduce the content of organic particles in the subareas with different odor grades, quantitatively monitor the odor formed by waste gas discharged by the pollution source, and perform targeted odor elimination treatment on different areas corresponding to an industrial park.
Preferably, in step S1, the recording the wind speed data corresponding to the target area, determining the maximum diffusion transport distance of the pollution particles from the pollution source according to the wind speed data, determining the pollution source odor detection area range according to the maximum transport distance, and collecting a plurality of air samples at a plurality of different positions in the pollution source odor detection area range specifically includes:
step S101, recording wind speed change data of a target area in a preset time period, and performing statistical analysis on the wind speed change data to determine an average wind speed value of the target area in the preset time period;
step S102, projecting visible light to a pollutant particle set discharged by the pollutant source, simultaneously recording a scattering spectrum of the pollutant particle set after scattering the projected visible light, determining the average particle size of the pollutant particles discharged by the pollutant source according to the scattering light wavelength and the scattering light intensity of the scattering spectrum, and determining the maximum diffusion transmission distance of the pollutant particles in the external environment according to the average wind speed value and the average particle size;
step S103, taking the area range formed by taking the position of the pollution source as the center of a circle and the maximum diffusion transmission distance as the radius as the pollution source odor detection area range, and collecting a plurality of air samples at the circumferential positions of concentric circles with different radii in the pollution source odor detection area range.
The beneficial effects of the above technical scheme are: because the pollution particles that the pollution source discharged can carry out diffusion propagation under the drive of atmospheric air current, and the wind speed in the external environment directly determines the maximum distance that the pollution particles can diffuse propagation in atmospheric environment, and the particle diameter of pollution particles self can also influence the diffusion propagation distance of pollution particles simultaneously. By collecting and recording the wind speed change data of the target area and carrying out statistical analysis, the corresponding average wind speed value can be accurately determined, thereby providing a reliable basis for determining the diffusion and propagation distance of the pollution particles. In addition, since the particle size of the pollution particles is usually small, the average particle size of the pollution particles is directly measured by the pollution in the prior art, but the wavelength and intensity of scattered light of the visible light by the micro particles are determined by the average particle size of the micro particles according to the mie scattering effect of the micro particles on the visible light, so that the average particle size of the pollution particles in the east is accurately and quickly determined by recording the corresponding scattering spectrum and combining the mie scattering effect mode. And finally, collecting a plurality of air samples at the circumferential positions of the concentric circles with different radiuses in the range of the pollution source odor detection area, so that the acquisition confidence of the air samples can be improved.
Preferably, in step S2, analyzing each air sample to obtain the type and concentration of organic particles contained in each air sample, determining the odor concentration level of each air sample according to the type and concentration of the organic particles, and dividing the pollution source odor detection area into several different odor level sub-areas according to the odor concentration level specifically includes:
step S201, performing fluorescence spectrum analysis on each air sample to obtain the type and concentration of organic particles contained in each air sample;
step S202, determining the actual concentration ratio of the organic particles containing amino groups in the organic particles according to the types and concentrations of the organic particles, and determining the odor concentration grade of each air sample according to the actual concentration ratio, wherein when the actual concentration ratio is higher, the odor concentration grade of the corresponding air sample is also higher;
step S203, according to the odor concentration level of each air sample, correspondingly dividing the collection area corresponding to each air sample in the pollution source odor detection area into odor level sub-areas with different odor concentration levels.
The beneficial effects of the above technical scheme are: since the fluorescence peak wavelengths of the fluorescence spectra of different organic particles are different, the type and concentration of the organic particles contained in the air sample can be comprehensively and accurately determined by performing fluorescence spectrum analysis on the air sample. Because the organic particles containing the amino groups generally generate odor, when the concentration of the organic particles containing the amino groups is higher, the corresponding odor grade is higher, so that the odor concentration grade of the air sample can be quantitatively evaluated by determining the actual concentration ratio of the organic particles containing the amino groups in the organic particles, and the collection area corresponding to each air sample can be correspondingly divided into odor grade sub-areas with different odor concentration grades conveniently and accurately.
Preferably, in step S3, the step of performing different modes of vacuum suction operation or different modes of water spraying operation on each odor grade sub-area according to the odor concentration grade of each odor grade sub-area, so as to reduce the content of organic particulate matters in the odor grade sub-area specifically comprises:
step S301, comparing the odor concentration grade of each odor grade subregion with a preset concentration grade threshold, and if the odor concentration grade exceeds the preset concentration grade threshold, determining the corresponding odor grade subregion as a region needing to be purified; otherwise, determining the corresponding odor grade subregion as a region which does not need to be purified;
step S302, judging whether the area coverage area corresponding to the area needing to be purified is larger than a preset area threshold value, if so, increasing the vacuumizing power for vacuumizing and adsorbing the area needing to be purified or increasing the water sprinkling amount for sprinkling the area needing to be purified.
The beneficial effects of the above technical scheme are: the method comprises the steps of determining an area needing to be purified and carrying out vacuum-pumping adsorption operation or water spraying operation according to the coverage area of the area needing to be purified by means of threshold value comparison, and increasing the vacuum-pumping power for carrying out the vacuum-pumping adsorption operation on the area needing to be purified or increasing the water spraying amount for carrying out the water spraying operation on the area needing to be purified when the coverage area is larger, so that organic particles floating in the air can be rapidly collected or settled, and the odor grade of the corresponding area is reduced to the maximum extent.
Preferably, in step S302, the specific determination procedure of the increased vacuum power corresponding to the increased vacuum power for performing the vacuum adsorption operation on the area to be purified and the increased watering amount corresponding to the increased watering amount for performing the watering operation on the area to be purified is as follows:
step S3021, using the following formula (1) to screen the odor grade sub-region according to a preset odor concentration grade threshold, and determining the screened odor grade sub-region as a region to be purified according to the odor concentration grade:
Figure BDA0002941024380000161
in the above formula (1), PaRepresenting the decision ranking value, C, corresponding to the a-th odor class sub-regionaIndicates the odor concentration grade corresponding to the a-th odor grade subregion, Ca+i+1Representing odor concentration levels corresponding to the a + i +1 th odor level sub-region, C representing a preset odor concentration level threshold, n representing the total number of the odor level sub-regions, u () representing a step function, wherein when the value in the bracket is greater than or equal to 0, the function value of the step function is 1, and when the value in the bracket is less than 0, the function value of the step function is 0;
when P is presentaWhen the odor level is 0, the first odor level sub-area is lower than a preset odor concentration level threshold, and the corresponding first odor level sub-area is determined as an area which does not need to be purified;
when P is presentaWhen not equal to 0, the first odor grade sub-area is equal to or larger than a preset odor concentration grade threshold value, the corresponding first odor grade sub-area is determined as the area needing to be purified, and PaThe value of (a) is the rank-ordering value of the odor concentration levels of the a-th odor level sub-area in all the odor concentration levels of the area needing to be purified, PaThe larger the value of (a) indicates the higher the odor concentration level in the sub-area of the a-th odor level;
step S3022, combining the areas of all the regions to be purified having the same determination rank value by using the following formula (2), so as to obtain the total area of all the regions to be purified having the same determination rank value:
Figure BDA0002941024380000171
in the above-mentioned formula (2),
Figure BDA0002941024380000172
indicates the total area of all areas to be decontaminated having the same rank order value as the sub-area of the a-th odor concentration level, Sa+i+1Denotes the area of the sub-region of the a + i +1 th odor class, Pa+i+1The judgment ordering value of the a + i +1 th odor grade sub-region is represented, delta () represents a unit impulse function, when the value in the bracket is equal to 0, the function value of the unit impulse function is 1, and when the value in the bracket is not equal to 0, the function value of the unit impulse function is 0;
step S3023, using the following formula (3) in combination with the total area of all the regions to be decontaminated
Figure BDA0002941024380000173
Determining the amount of increase in the evacuation power and the amount of increase in the watering:
Figure BDA0002941024380000174
in the above formula (3), Δ paIndicates the amount of increase in vacuum power, Δ w, corresponding to the sub-region of the a-th odor concentration levelaIndicating the amount of increased water spray corresponding to the sub-area of the a-th odor concentration level,
Figure BDA0002941024380000175
represents a preset area region and takes the value of 0.5m2～0.8m2，paThe standard vacuum pumping power value corresponding to the area equal to the preset area range is represented and is 200-800 kw, waThe corresponding standard water spraying amount in the range with the area equal to the preset area is expressed, and the value of the standard water spraying amount is 0.5m3-0.8m3。
The beneficial effects of the above technical scheme are: screening odor concentration levels in odor concentration level sub-areas according to a preset concentration level threshold by using the formula (1), and sequencing the screened areas determined to be the areas needing purification treatment according to the odor concentration levels, so that the areas determined to be the areas needing purification treatment are accurately divided according to the sequencing values; then, the areas of the regions to be purified with the same sequencing value are combined by using the formula (2) to obtain the total area of the regions to be purified with the same sequencing value, so that the areas of the regions to be purified with the same grade are combined, the regions to be purified with the same grade are convenient to carry out uniform vacuum-pumping adsorption operation and water spraying operation on the regions to be purified with the same grade, and the efficiency of the system is optimized; and finally, obtaining the increment of the vacuumizing power of the vacuumizing adsorption operation and the increment of the water spraying amount of the water spraying operation on the area needing to be purified by using the formula (3), so that the vacuumizing adsorption operation in different modes of the corresponding area and the water spraying operation in different modes can be carried out according to the increments, and the reliability of the operation and the reliability of deodorization are ensured.
Preferably, in step S103, the area range formed by taking the position of the pollution source as a center of a circle and the maximum diffusion transmission distance as a radius specifically includes:
and (2) establishing a plane rectangular coordinate system by taking the pollution source as a dot, taking the wind speed direction as the positive direction of an X axis and taking any direction perpendicular to the wind speed direction as the positive direction of a Y axis, and then obtaining the following relational expression (4) between the diffusion concentration of the pollution source and the coordinate position of any point in the coordinate system by establishing a Gaussian distribution model:
Figure BDA0002941024380000181
in the above equation (4), Q (x, y) represents the diffusion concentration of the contamination source at the position where the coordinate point is (x, y) in the coordinate system, VxRepresents the release rate of the pollution source odor along the X-axis direction, Q represents the total amount of the pollution source odor released, VfThe method comprises the steps of representing a current wind speed value, wherein lambda represents a diffusion coefficient, the diffusion coefficient is related to a coordinate value X corresponding to a certain coordinate point in a coordinate system on an X axis, pi represents a circumferential rate, X represents a position coordinate of a distance X on the X axis along a wind speed direction, and Y represents a position coordinate of a distance Y on a Y axis along a calm direction;
let Q (x, y) be ρkWhere ρ iskExpressing the concentration value of nitrogen in the current air environment, and changing the formula Q (x, y) to rhokPerforming simultaneous solution with the above formula (4) to obtain corresponding coordinate values of a plurality of (x, y), wherein the obtained corresponding coordinate values of the plurality of (x, y) are edge coordinate points, and selecting the edge coordinate points
Figure BDA0002941024380000191
The maximum value is the maximum transmission distance, and the area enclosed by the edge coordinate points is the pollution source odor detection area.
The beneficial effects of the above technical scheme are: by using the formula (4), the farthest diffusion range of the pollution source odor can be rapidly and comprehensively calculated under the condition that the wind speed influences the diffusion of the pollution source odor in a full consideration, so that the boundary line influenced by the pollution source odor is accurately determined, and the determination reliability of the detection area range of the pollution source odor is improved.
As can be seen from the content of the above embodiments, the online monitoring system and method for odor of a pollution source determine a maximum diffusion transmission distance of pollution particles from the pollution source according to wind speed data corresponding to a target area, determine a detection area range of the pollution source odor according to the maximum transmission distance, collect a plurality of air samples at a plurality of different positions in the detection area range of the pollution source odor, analyze each air sample to obtain a type and a concentration of organic particles contained in each air sample, determine an odor concentration level of each air sample according to the type and the concentration of the organic particles, divide the detection area range of the pollution source odor into a plurality of different odor level sub-areas according to the odor concentration level, and finally, according to the respective odor concentration level of each odor level sub-area, carrying out vacuum-pumping adsorption operation or sprinkling operation in different modes on the odor grade area, so as to reduce the content of organic particulate matters in the odor grade area; therefore, the online monitoring system and the online monitoring method for the odor of the pollution source can determine the range of a detection area of the odor of the pollution source according to the wind speed state of a target area, collect and analyze a plurality of air samples at a plurality of different positions in the range of the detection area of the odor of the pollution source, determine the odor concentration grade of each air sample according to the type and concentration of organic matter particles obtained by analysis, divide the range of the detection area of the odor of the pollution source into a plurality of subareas with different odor grades, and finally perform vacuumizing adsorption operation or water spraying operation in different modes on the subareas with the odor grades so as to reduce the content of organic particles in the subareas with the odor grades, so that the odor formed by waste gas discharged by the pollution source can be quantitatively monitored, and targeted odor elimination treatment can be performed on different areas corresponding to an industrial park.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. The pollution source odor on-line monitoring system is characterized by comprising a pollution source detection area range determining module, an air sample collecting module, an air sample analyzing module, an odor grade subregion dividing module and an odor grade subregion purifying processing module; wherein the content of the first and second substances,
the pollution source detection area range determining module is used for recording wind speed data corresponding to a target area, determining the maximum diffusion transmission distance of pollution particles from a pollution source according to the wind speed data, and determining the pollution source odor detection area range according to the maximum transmission distance;
the air sample collection module is used for collecting a plurality of air samples at a plurality of different positions in the range of the pollution source odor detection area;
the air sample analysis module is used for analyzing each air sample so as to obtain the type and concentration of organic particles contained in each air sample;
the odor grade subregion dividing module is used for determining the odor concentration grade of each air sample according to the type and the concentration of the organic matter particles, and dividing the pollution source odor detection region range into a plurality of different odor grade subregions according to the odor concentration grade;
the odor grade subregion purification treatment module is used for carrying out vacuumizing adsorption operation or sprinkling operation in different modes on the odor grade region according to the respective odor concentration grade of each odor grade subregion, so that the content of organic particles in the odor grade subregion is reduced.
2. The online pollution source odor monitoring system as claimed in claim 1, wherein:
the pollution source detection area range determining module records wind speed data corresponding to a target area, determines the maximum diffusion transmission distance of pollution particles from a pollution source according to the wind speed data, and determines the pollution source odor detection area range according to the maximum transmission distance, wherein the pollution source odor detection area range determining module specifically comprises the following steps:
recording wind speed change data of a target area in a preset time period, and performing statistical analysis on the wind speed change data so as to determine an average wind speed value of the target area in the preset time period;
projecting visible light to the pollutant particle set discharged by the pollutant source, recording a scattering spectrum of the pollutant particle set after scattering the projected visible light, determining the average particle size of the pollutant particles discharged by the pollutant source according to the scattering light wavelength and the scattering light intensity of the scattering spectrum, and determining the maximum diffusion transmission distance of the pollutant particles in the external environment according to the average wind speed value and the average particle size;
and the number of the first and second groups,
the air sample collection module collects a plurality of air samples at a plurality of different positions in the pollution source odor detection area range, and the air sample collection module specifically comprises:
and taking the area range formed by taking the position of the pollution source as the center of a circle and the maximum diffusion transmission distance as the radius as the pollution source odor detection area range, and collecting a plurality of air samples at the circumferential positions of concentric circles with different radii in the pollution source odor detection area range.
3. The online pollution source odor monitoring system as claimed in claim 1, wherein:
the air sample analysis module is used for analyzing each air sample, and obtaining the type and concentration of organic particles contained in each air sample specifically comprises:
performing fluorescence spectrum analysis on each air sample to obtain the type and concentration of organic particles contained in each air sample;
and the number of the first and second groups,
the odor grade subregion divides the module according to the kind and the concentration of organic matter granule, confirms the foul smell concentration level of every air sample, again according to foul smell concentration level, will the regional scope of pollution source foul smell detection divides into a plurality of different odor grade subregions and specifically includes:
determining the actual concentration ratio of organic particles containing amino groups in the organic particles according to the types and concentrations of the organic particles, and determining the odor concentration grade of each air sample according to the actual concentration ratio, wherein when the actual concentration ratio is higher, the odor concentration grade of the corresponding air sample is also higher;
and correspondingly dividing the acquisition area corresponding to each air sample in the range of the pollution source odor detection area into odor grade sub-areas with different odor concentration grades according to the odor concentration grade of each air sample.
4. The online pollution source odor monitoring system as claimed in claim 1, wherein:
the sub-regional purification treatment module of stink grade carries out the evacuation of different modes of absorption operation or the watering operation of different modes to the regional stink grade according to the respective foul smell concentration grade of each sub-region of stink grade to reduce the sub-regional organic particulate matter content of stink grade specifically includes:
comparing the odor concentration grade of each odor grade subregion with a preset concentration grade threshold, and if the odor concentration grade exceeds the preset concentration grade threshold, determining the corresponding odor grade subregion as an area needing purification treatment; otherwise, determining the corresponding odor grade subregion as a region which does not need to be purified;
and judging whether the area coverage area corresponding to the area needing to be purified is larger than a preset area threshold value, if so, increasing the vacuumizing power for vacuumizing and adsorbing the area needing to be purified or increasing the water spraying amount for spraying the area needing to be purified.
5. The online monitoring method of the odor of the pollution source is characterized by comprising the following steps:
step S1, recording wind speed data corresponding to a target area, determining the maximum diffusion transmission distance of pollution particles from a pollution source according to the wind speed data, determining the detection area range of the odor of the pollution source according to the maximum transmission distance, and collecting a plurality of air samples at a plurality of different positions in the detection area range of the odor of the pollution source;
step S2, analyzing each air sample to obtain the type and concentration of organic particles contained in each air sample, determining the odor concentration grade of each air sample according to the type and concentration of the organic particles, and dividing the pollution source odor detection area range into a plurality of different odor grade sub-areas according to the odor concentration grade;
and step S3, according to the odor concentration level of each odor level subregion, carrying out different modes of vacuum suction operation or different modes of water spraying operation on the odor level subregion, thereby reducing the content of the organic particulate matters in the odor level subregion.
6. The online pollution source odor monitoring method according to claim 5, wherein:
in step S1, recording wind speed data corresponding to the target area, determining a maximum diffusion transport distance of pollution particles from the pollution source according to the wind speed data, determining a pollution source odor detection area range according to the maximum transport distance, and collecting a plurality of air samples at a plurality of different positions in the pollution source odor detection area range to obtain a specific example includes:
step S101, recording wind speed change data of a target area in a preset time period, and performing statistical analysis on the wind speed change data to determine an average wind speed value of the target area in the preset time period;
step S102, projecting visible light to a pollutant particle set discharged by the pollutant source, simultaneously recording a scattering spectrum of the pollutant particle set after scattering the projected visible light, determining the average particle size of the pollutant particles discharged by the pollutant source according to the scattering light wavelength and the scattering light intensity of the scattering spectrum, and determining the maximum diffusion transmission distance of the pollutant particles in the external environment according to the average wind speed value and the average particle size;
and step S103, taking the area range formed by taking the position of the pollution source as the center of a circle and the maximum diffusion transmission distance as the radius as the pollution source odor detection area range, and collecting a plurality of air samples at the circumferential positions of concentric circles with different radii in the pollution source odor detection area range.
7. The online pollution source odor monitoring method according to claim 5, wherein:
in step S2, analyzing each air sample to obtain the type and concentration of organic particles contained in each air sample, determining the odor concentration level of each air sample according to the type and concentration of the organic particles, and dividing the pollution source odor detection area range into a plurality of different odor level sub-areas according to the odor concentration level specifically includes:
step S201, performing fluorescence spectrum analysis on each air sample to obtain the type and concentration of organic particles contained in each air sample;
step S202, determining the actual concentration ratio of the organic particles containing amino groups in the organic particles according to the types and concentrations of the organic particles, and determining the odor concentration grade of each air sample according to the actual concentration ratio, wherein when the actual concentration ratio is higher, the odor concentration grade of the corresponding air sample is also higher;
step S203, according to the odor concentration level of each air sample, correspondingly dividing the collection area corresponding to each air sample in the pollution source odor detection area range into odor level sub-areas with different odor concentration levels.
8. The online pollution source odor monitoring method according to claim 5, wherein:
in step S3, the step of performing different modes of vacuum suction operation or different modes of water spraying operation on the odor grade region according to the odor concentration level of each odor grade subregion, so as to reduce the content of organic particulate matters in the odor grade subregion specifically includes:
step S301, comparing the odor concentration grade of each odor grade subregion with a preset concentration grade threshold, and if the odor concentration grade exceeds the preset concentration grade threshold, determining the corresponding odor grade subregion as a region to be purified; otherwise, determining the corresponding odor grade subregion as a region which does not need to be purified;
step S302, judging whether the area coverage area corresponding to the area needing to be purified is larger than a preset area threshold value, if so, increasing the vacuumizing power for vacuumizing and adsorbing the area needing to be purified or increasing the water sprinkling amount for sprinkling the area needing to be purified.
9. The online pollution source odor monitoring method according to claim 8, wherein:
in step S302, a specific determination process of increasing the vacuuming power increase amount corresponding to the vacuuming power for performing the vacuuming adsorption operation on the area to be purified and increasing the watering increase amount corresponding to the watering amount for performing the watering operation on the area to be purified is as follows:
step S3021, screening the odor grade sub-area according to a preset odor concentration grade threshold value by using the following formula (1), and determining the screened odor grade sub-area as an area needing purification treatment according to the odor concentration grade:
Figure FDA0002941024370000061
in the above formula (1), PaRepresenting the decision ranking value, C, corresponding to the a-th odor class sub-regionaIndicates the odor concentration grade corresponding to the a-th odor grade subregion, Ca+i+1Representing odor concentration levels corresponding to the a + i +1 th odor level sub-region, C representing a preset odor concentration level threshold, n representing the total number of the odor level sub-regions, u () representing a step function, wherein when the value in the bracket is greater than or equal to 0, the function value of the step function is 1, and when the value in the bracket is less than 0, the function value of the step function is 0;
when P is presentaWhen 0, it represents the odor of the a th placeThe odor grade sub-area is lower than a preset odor concentration grade threshold value, and the corresponding a-th odor grade sub-area is determined as an area which does not need to be purified;
when P is presentaWhen not equal to 0, the first odor grade sub-area is equal to or larger than a preset odor concentration grade threshold value, the corresponding first odor grade sub-area is determined as the area needing to be purified, and PaThe value of (a) is the rank-ordering value of the odor concentration levels of the a-th odor level sub-area in all the odor concentration levels of the area needing to be purified, PaThe larger the value of (a) indicates the higher the odor concentration level in the sub-area of the a-th odor level;
step S3022, combining the areas of all the regions to be purified having the same determination rank value by using the following formula (2), so as to obtain the total area of all the regions to be purified having the same determination rank value:
Figure FDA0002941024370000062
in the above-mentioned formula (2),
Figure FDA0002941024370000063
indicates the total area of all areas to be decontaminated having the same rank order value as the sub-area of the a-th odor concentration level, Sa+i+1Denotes the area of the sub-region of the a + i +1 th odor class, Pa+i+1The judgment ordering value of the a + i +1 th odor grade sub-region is represented, delta () represents a unit impulse function, when the value in the bracket is equal to 0, the function value of the unit impulse function is 1, and when the value in the bracket is not equal to 0, the function value of the unit impulse function is 0;
step S3023, using the following formula (3) in combination with the total area of all the regions to be decontaminated
Figure FDA0002941024370000071
Determining the amount of increase in the evacuation power and the amount of increase in the watering:
Figure FDA0002941024370000072
in the above formula (3), Δ paIndicates the amount of increase in vacuum power, Δ w, corresponding to the sub-region of the a-th odor concentration levelaIndicating the amount of increased water spray corresponding to the sub-area of the a-th odor concentration level,
Figure FDA0002941024370000073
represents a preset area region and takes the value of 0.5m2～0.8m2，paThe standard vacuum pumping power value corresponding to the area equal to the range of the preset area is represented, and the value of the standard vacuum pumping power value is 200-800 kw, waThe corresponding standard water spraying amount in the range with the area equal to the preset area is expressed, and the value of the standard water spraying amount is 0.5m3-0.8m3。
10. The online pollution source odor monitoring method according to claim 6, wherein:
in step S103, taking an area range formed by taking the position of the pollution source as a center of a circle and the maximum diffusion transmission distance as a radius as a pollution source odor detection area range specifically includes:
a plane rectangular coordinate system is established by taking a pollution source as a dot, taking the wind speed direction as the positive direction of an X axis and taking any direction perpendicular to the wind speed direction as the positive direction of a Y axis, and then the following relational expression (4) between the diffusion concentration of the pollution source and the coordinate position of any point in the coordinate system is obtained by establishing a Gaussian distribution model:
Figure FDA0002941024370000074
in the above-mentioned formula (4),
Figure FDA0002941024370000075
q (x, y) represents the position of a coordinate point (x, y) in a coordinate systemDiffusion concentration of the source of contamination, VxRepresents the release speed of the pollution source odor along the X-axis direction, Q represents the total release amount of the pollution source odor, VfRepresenting the current wind speed value, and lambda represents the diffusion coefficient; pi represents a circumference ratio, X represents a coordinate value corresponding to a certain coordinate point in a coordinate system on an X axis, and Y represents a coordinate value corresponding to a certain coordinate point in the coordinate system on a Y axis; let Q (x, y) be ρkWhere ρ iskExpressing the concentration value of nitrogen in the current air environment, and changing the formula Q (x, y) to rhokPerforming simultaneous solution with the above formula (4) to obtain corresponding coordinate values of a plurality of (x, y), wherein the obtained corresponding coordinate values of the plurality of (x, y) are edge coordinate points, and selecting one of the edge coordinate points
Figure FDA0002941024370000081
The maximum value is the maximum transmission distance, and the area enclosed by the edge coordinate points is the pollution source odor detection area.
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