CN120123858A - Portable flue gas analysis device and method - Google Patents
Portable flue gas analysis device and method Download PDFInfo
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Abstract
The invention discloses a portable smoke analysis device and method, which relates to the technical field of smoke analysis, the device comprises a sampling tube analysis module, a basic sampling analysis module and a resampling analysis module, firstly, a sampling tube use scheme is set through the sampling tube analysis module, secondly, basic environment information is acquired through the basic sampling analysis module according to the sampling tube use scheme, a smoke collector use scheme is set for basic sampling, setting a resampling scheme according to the analysis result of basic sampling data, and finally setting each effective wind speed according to the resampling scheme by a resampling analysis module to resample, collecting the smoke resampling environment data, analyzing the resampling smoke data, carrying out early warning and prompting a preset experimental scene of the current collecting environment.
Description
Technical Field
The invention relates to the technical field of flue gas analysis, in particular to a portable flue gas analysis device and method.
Background
The prior art, such as the patent application publication CN106018703B, discloses a smoke analysis system and method. The invention provides a flue gas analysis system which is connected with a pollution emission source through a heat tracing pipeline and comprises a control device, a sampling device and an analysis device, wherein the sampling device and the analysis device are respectively detachably connected with the control device, the sampling device comprises a high-temperature processing unit and a normal-temperature processing unit, the normal-temperature processing unit comprises a cooling water removing subunit and a sampling pump, and the high-temperature processing unit is connected with the cooling water removing subunit through the analysis device. According to the application, the water removing subunit and the conventional sampling pump are cooled, so that the use of a high-cost high-temperature sampling pump or a jet pump needing to jet air is avoided, the stability and controllability of sampling are improved, and the cost is reduced. Meanwhile, the system adopts a detachable and separable design mode, is not only suitable for on-line monitoring, but also suitable for portable monitoring, can realize analysis of different components by replacing an analysis device, and enhances the universality of the system.
Aiming at the scheme, the invention has the following technical problems that 1, the detection and evaluation of the self state of the sampling tube are not carried out, the adsorption data, the filter condition data and the surface foreign matter data of the sampling tube are not analyzed, the sampling data can be influenced by the performance change of the sampling tube, and the analysis accuracy is reduced.
2. The scheme only carries out cooling dewatering to sampling flue gas, but when setting up the sampling scheme, the influence of fluctuation factors such as temperature, humidity, air current velocity of flow of sampling environment to flue gas collection and analysis is not fully considered to above-mentioned scheme, and the sampling process can not be in a steady environmental condition, and above-mentioned scheme probably makes the unable adaptation of collection scheme complicated changeable actual environment, has reduced the validity of sampling data.
3. The method does not analyze the sampled data of different collectors, so that the validity of the sampled data cannot be judged, and meanwhile, the scheme does not study and optimize the influence of different flue gas concentration scenes and experimental wind speeds on the sampling effect, so that the data cannot be collected under the optimal wind speed condition, and the accuracy and the validity of the data are influenced.
Disclosure of Invention
In view of the above-mentioned technical shortcomings, the present invention aims to provide a portable flue gas analysis device and a portable flue gas analysis method.
In order to solve the technical problems, the invention provides a portable flue gas analysis device which comprises a sampling tube analysis module, a sampling tube analysis module and a sampling tube application scheme, wherein the sampling tube analysis module is used for collecting interference data of a sampling tube basic instrument and analyzing the interference data of the sampling tube basic instrument to obtain an influence evaluation index of the sampling tube.
The basic sampling analysis module is used for acquiring basic environment information according to a sampling tube use scheme, setting a smoke collector use scheme according to the basic environment information, further setting each sampling point of the sampling tube according to the smoke collector use scheme, thereby performing basic sampling, collecting basic sampling smoke data of each sampling point of the sampling tube, analyzing the basic sampling smoke data of each sampling point of the sampling tube, obtaining environment basic smoke data, and setting a resampling scheme according to the environment basic smoke data.
And the resampling analysis module is used for obtaining each effective wind speed of the sampling tube according to the resampling scheme, setting each effective wind speed through the flow regulating valve, resampling, collecting the flue gas resampling environment data of each sampling point of each effective wind speed, analyzing the resampling flue gas data of each sampling point of each effective wind speed of the sampling tube, and carrying out early warning.
Preferably, the resampling scheme is set, and the specific setting process comprises the steps of carrying out average value calculation on the concentration of each type of flue gas collected by each effective collecting point to obtain the collecting point concentration of each type of flue gas of each effective collecting point, carrying out average value calculation on the collecting point concentration of each type of flue gas of each effective collecting point to obtain the collecting pipe concentration of each type of flue gas, and carrying out average value calculation on the basic sampling evaluation index of each collecting point of the sampling pipe to obtain the sampling pipe sampling evaluation index of the current sampling pipe.
Acquiring sampling tube sampling evaluation index intervals and various smoke concentrations of various smoke concentration experiment scenes from a database, carrying out vector conversion on various smoke concentrations of various smoke concentration experiment scenes and collecting tube concentrations of various smoke to obtain smoke characteristic vectors of various smoke concentration experiment scenes and smoke characteristic vectors of current collecting tubes, and carrying out cosine similarity calculation on the smoke characteristic vectors of various smoke concentration experiment scenes and the smoke characteristic vectors of the current collecting tubes to obtain the similarity of the current collecting tubes of various smoke concentration experiment scenes.
If the sampling tube sampling evaluation index of the current sampling tube belongs to a sampling tube sampling evaluation index interval corresponding to a certain type of flue gas concentration experimental scene, the sampling tube belongs to an effective flue gas concentration experimental scene, so that the similarity of the current sampling tube of each effective flue gas concentration experimental scene is obtained, and the effective flue gas concentration experimental scene with the maximum similarity of the current sampling tube is selected to be recorded as a preset experimental scene.
Obtaining preset basic concentration in various kinds of smoke from a database, recording the type of smoke as the effective smoke type of the current sampling tube when the concentration of the collecting tube in the various kinds of smoke of the current sampling tube is larger than the corresponding preset basic concentration, obtaining various kinds of effective smoke of the current sampling tube, obtaining a concentration ratio stability index corresponding to various experimental wind speeds of a preset experimental scene and a concentration variation coefficient of various kinds of effective smoke of the current sampling tube from the database, substituting the concentration ratio stability index corresponding to various experimental wind speeds of the preset experimental scene and the concentration variation coefficient of various kinds of effective smoke of the current sampling tube into a wind speed use stability index calculation formula to obtain wind speed use stability indexes of various experimental wind speeds of the preset experimental scene, and recording all experimental wind speeds of the preset experimental scene with the wind speed use stability index larger than the preset standard wind speed use stability index as various effective wind speeds.
The resampling scheme is that the wind speed of the air inlet of the sampling tube is adjusted through a flow adjusting valve of a fan at the tail end of the sampling tube, the wind speed of the air inlet of the sampling tube is adjusted to be the gear of each effective wind speed, and the flue gas data acquisition of each effective wind speed is respectively carried out at the gear of each effective wind speed.
On the other hand, the invention provides a portable flue gas analysis method, which comprises the following steps of firstly, analyzing a sampling tube, namely collecting interference data of a sampling tube basic instrument, analyzing the interference data of the sampling tube basic instrument to obtain an influence evaluation index of the sampling tube, and further setting a sampling tube use scheme.
And secondly, basic sampling analysis, namely acquiring basic environment information according to a sampling tube use scheme, setting a smoke collector use scheme according to the basic environment information, setting each sampling point of the sampling tube according to the smoke collector use scheme so as to perform basic sampling, acquiring basic sampling smoke data of each sampling point of the sampling tube, analyzing the basic sampling smoke data of each sampling point of the sampling tube to obtain environment basic smoke data and basic sampling evaluation indexes, and setting a resampling scheme according to the environment basic smoke data.
And thirdly, resampling and analyzing, namely obtaining each effective wind speed of the sampling tube according to a resampling scheme, setting each effective wind speed through a flow regulating valve, resampling, collecting the flue gas resampling environment data of each sampling point of each effective wind speed, analyzing the resampling flue gas data of each sampling point of each effective wind speed of the sampling tube, and carrying out early warning.
The invention has the beneficial effects that 1, firstly, a sampling tube analysis module is used for setting a sampling tube use scheme, secondly, a basic sampling analysis module is used for collecting basic environment information according to the sampling tube use scheme, a flue gas collector use scheme is set for basic sampling, a resampling scheme is set according to a basic sampling data analysis result, and finally, resampling is carried out according to each effective wind speed set by the resampling analysis module for collecting flue gas resampling environment data, analyzing the resampling flue gas data, carrying out early warning and prompting a preset experimental scene of the current collecting environment.
2. According to the invention, by collecting the interference data of the basic instrument of the sampling tube and calculating the influence evaluation index of the sampling tube, whether the sampling tube needs to be replaced or not can be timely judged, and meanwhile, the sampling correction factors are obtained to correct the subsequent sampling data, so that the accuracy of the sampling data is improved, and the defect that the state of the sampling tube is not considered is overcome.
3. According to the invention, the environment fluctuation assessment index is calculated according to the basic environment information, so that a proper smoke collector use scheme and each sampling point of the sampling tube are set, the device can be better adapted to different sampling environments, the sampled data volume is increased, and the possibility of excessive errors of data caused by insufficient environment adaptability is reduced.
4. According to the invention, a smoke scene is set, sampling wind speed compensation is carried out, resampling is carried out under different effective wind speeds, the influence of different wind speeds on the sampling effect is fully considered, the sampling process is optimized, and the accuracy of sampling data is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a device according to the invention structural connection schematic diagram.
FIG. 2 is a flow chart of the steps of the method of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
According to FIG. 1, the invention provides a portable flue gas analysis device, which comprises a sampling tube analysis module, a basic sampling analysis module, a resampling analysis module and a database.
The basic sampling analysis module is respectively connected with the sampling tube analysis module and the resampling analysis module, and the sampling tube analysis module, the basic sampling analysis module and the resampling analysis module are all connected with the database.
The sampling tube analysis module is used for collecting interference data of the sampling tube basic instrument, analyzing the interference data of the sampling tube basic instrument, obtaining an influence evaluation index of the sampling tube, and further setting a sampling tube use scheme.
In one embodiment, the specific acquisition process of the acquisition sampling tube base instrument interference data comprises the adsorption evaluation index, the filter use index and the surface foreign matter index of the sampling tube.
Detecting the concentration of each particle size particle in the gas before and after the sampling tube filter by using a particle counter, calculating the difference to obtain the concentration difference of each particle size particle, dividing the concentration difference of each particle size particle by the concentration of the particle before the filter corresponding to the particle size to obtain the interception efficiency of each particle size particle, weighting and calculating to obtain the interception efficiency of the filter, recording the interception efficiency of the filter as the adsorption evaluation index of the sampling tube, measuring the pressure difference at two ends of the filter by using a pressure sensor, obtaining the use index correction factor corresponding to the current filter use times and the filter basic use index corresponding to each pressure difference by using a database, obtaining the basic use index and the use index correction factor of the filter, and multiplying the basic use index of the filter by the use index correction factor to obtain the filter use index of the sampling tube.
And acquiring the surface picture of the sampling tube by a camera, and obtaining the similarity between the surface picture of the sampling tube and each surface foreign matter index picture by a picture identification technology, wherein the surface foreign matter index of the surface foreign matter index picture with the highest similarity is recorded as the surface foreign matter index of the sampling tube.
In one embodiment, the analysis of the interference data of the sampling tube basic instrument comprises the following steps of substituting the adsorption evaluation index, the filter usage index and the surface foreign matter index of the sampling tube into a sampling tube influence evaluation index calculation formula to obtain a sampling tube influence evaluation index.
It should be noted that, the influence of the adsorption evaluation index, the filter use index and the surface foreign matter index of the sampling tube on the sampling precision of the sampling tube can be analyzed by the sampling tube influence evaluation index calculation formula, so that the effectiveness of sampling data of the sampling tube is increased, and the sampling tube influence evaluation index calculation formula expression is as follows: , wherein, For the sample tube to influence the evaluation index, 、 AndThe adsorption evaluation index, the filter usage index and the surface foreign matter index of the sampling tube respectively, 、 AndRespectively a preset standard adsorption evaluation index, a standard filter use index and a standard surface foreign matter index, 、 AndThe adsorption evaluation index weight factor, the filter usage index weight factor and the surface foreign matter index weight factor are preset respectively, , , , 。
Standard parameters 、 AndThe adsorption evaluation index threshold value, the filter use index threshold value and the surface foreign matter index threshold value of the normal use sampling tube respectively, when the adsorption evaluation index is smaller than the threshold value, the influence of the sampling tube on the flue gas data is larger, and when the filter use index is larger than the threshold value and the surface foreign matter index is larger than the threshold value, the influence of the sampling tube on the flue gas data is larger, and the specific value is set by staff, for exampleIs 0.98 part,Is 0.78 andWeight factor of 0.12 、 AndIs set by staff, e.g. byIs 0.4 part,Is 0.3 and0.3.
In a specific embodiment, the use scheme of the sampling tube is set, and the specific setting process comprises the steps of carrying out sampling tube replacement to obtain a new sampling tube if the sampling tube influence evaluation index is larger than a preset standard sampling tube influence evaluation index, further collecting interference data of a basic instrument of the new sampling tube, analyzing to obtain the new sampling tube influence evaluation index, recording the new sampling tube influence evaluation index as the sampling tube sampling influence evaluation index, recording the sampling tube influence evaluation index as the sampling tube sampling influence evaluation index if the sampling tube influence evaluation index is smaller than or equal to the preset standard sampling tube influence evaluation index, acquiring sampling correction factors corresponding to all the influence evaluation indexes from a database, and further obtaining sampling correction factors of sampling tube sampling.
It should be noted that, the impact evaluation index of the standard sampling tube is the impact evaluation index threshold of the normal sampling tube, when the impact evaluation index is greater than the threshold, it indicates that the flue gas data is greatly affected by the sampling tube, the error caused by collection cannot be compensated and analyzed by the correction factor, and the specific value is set by the staff.
The sampling tube using scheme is that if the sampling tube influence evaluation index is larger than a preset standard sampling tube influence evaluation index, sampling tube replacement is carried out, and if the sampling tube influence evaluation index is smaller than or equal to the preset standard sampling tube influence evaluation index, the sampling tube is directly used, and meanwhile follow-up sampling data are corrected according to sampling correction factors of sampling of the sampling tube.
The basic sampling analysis module is used for acquiring basic environment information according to a sampling tube use scheme, setting a smoke collector use scheme according to the basic environment information, further setting each sampling point of the sampling tube according to the smoke collector use scheme, thereby performing basic sampling, collecting basic sampling smoke data of each sampling point of the sampling tube, analyzing the basic sampling smoke data of each sampling point of the sampling tube, obtaining environment basic smoke data, and setting a resampling scheme according to the environment basic smoke data.
In one embodiment, the basic environment information is collected by a specific collection process, wherein the basic environment information comprises a temperature fluctuation index, a humidity fluctuation index, an airflow velocity fluctuation index and an airflow characteristic correction index of a sampling environment.
The temperature, humidity and airflow velocity of each collection in a preset time are collected, the temperature variation coefficient, the humidity variation coefficient and the airflow velocity variation coefficient of the sampling environment are calculated through a variation coefficient algorithm, and the temperature variation coefficient, the humidity variation coefficient and the airflow velocity variation coefficient of the sampling environment are respectively recorded as the temperature fluctuation index, the humidity fluctuation index and the airflow velocity fluctuation index of the sampling environment.
It should be noted that, the coefficient of variation is a normalized measure of the degree of dispersion of the probability distribution, and the coefficient of variation algorithm is the prior art, and can be specifically queried from the internet, and will not be described again.
Acquiring airflow characteristic information of a sampling environment through a anemoscope, vectorizing to obtain airflow characteristic vectors of the sampling environment, acquiring characteristic vectors of each characteristic correction index airflow from a database, performing cosine similarity calculation to obtain sampling environment similarity of each characteristic correction index airflow, and selecting the characteristic correction index of the airflow with the maximum sampling environment similarity as the characteristic correction index of the sampling environment.
It should be noted that the airflow characteristic information includes, but is not limited to, a change in direction of the airflow, vortex formation, and airflow stratification.
In a specific embodiment, the method for setting the use scheme of the smoke collectors comprises the following steps of substituting a temperature fluctuation index, a humidity fluctuation index, an airflow velocity fluctuation index and an airflow characteristic correction index of a sampling environment into an environment fluctuation assessment index calculation formula to obtain an environment fluctuation assessment index of the sampling environment, acquiring an environment fluctuation assessment index interval corresponding to each use scheme of the smoke collectors from a database, and indicating that the current sampling environment is applicable to the use scheme of the smoke collectors if the environment fluctuation assessment index of the sampling environment belongs to the environment fluctuation assessment index interval corresponding to the use scheme of a certain smoke collector.
It should be noted that, through the calculation formula of the environmental fluctuation assessment index, the error analysis of the temperature fluctuation index, the humidity fluctuation index and the airflow flow velocity fluctuation index on the sampling of the collector can be analyzed, the larger the environmental fluctuation assessment index is, the larger the probability of excessive error of the subsequent sampling of the collecting tube is, and more data analysis of the collecting points is needed, so that the collecting precision is ensured, and the expression of the calculation formula of the environmental fluctuation assessment index is: , wherein, The index is evaluated for environmental fluctuations and, 、 、 AndThe temperature fluctuation index, the humidity fluctuation index, the airflow velocity fluctuation index and the airflow characteristic correction index of the sampling environment are respectively, 、 AndRespectively a preset standard temperature fluctuation index, a standard humidity fluctuation index and a standard airflow flow velocity fluctuation index, 、 AndRespectively a preset temperature fluctuation index weight factor, a humidity fluctuation index weight factor and a gas flow velocity fluctuation index weight factor, , , , 。
Standard parameters 、 AndSetting procedure and standard parameters of (a)Is the same as the setting process, e.gIs 0.87,Is 0.93 andWeight factor of 0.97 、 AndIs set up by the process and weight factor of (2)Is the same as the setting process, e.gIs 0.3 part,Is 0.3 and0.4.
The smoke collector has the use scheme that the first collection point is arranged by taking the preset distance length as the distance from the first collection point to the inlet of the collection tube, the collection points are arranged by taking the preset interval length as the distance from the collection points, the positions of the collection points in the collection tube are arranged by taking the preset interval length as the distance from the collection points, and the probes of the collectors are arranged at the positions of the collection points.
It should be noted that, the preset distance length and the preset interval length are obtained by a worker through experiments, and the specific numerical value is preset by the worker.
In a specific embodiment, the basic sampling smoke data of each sampling point of the sampling tube is collected, the specific collecting process is that the basic sampling smoke data of each sampling point of the sampling tube is the concentration of each type of smoke collected by each sampling point of the sampling tube, the basic concentration of each type of smoke collected by each sampling point of the sampling tube is collected through an electrochemical sensor of each sampling point of the sampling tube, and the basic concentration is multiplied by a sampling correction factor to obtain the concentration of each type of smoke collected by each sampling point.
In a specific embodiment, the analysis is performed on the basic sampling smoke data of each sampling point of the sampling tube, and the specific analysis process is that the concentration of each type of smoke collected by each sampling point of the sampling tube is subjected to fluctuation index calculation, trend index calculation and offset index calculation to obtain the smoke fluctuation index, the smoke trend index and the smoke offset index of each sampling point of the sampling tube.
The fluctuation index is calculated by calculating the concentration of various types of smoke acquired by each acquisition point through a variation coefficient algorithm to obtain the smoke fluctuation index of various types of smoke of each acquisition point of the sampling tube, and weighting calculation to obtain the smoke fluctuation index of each acquisition point of the sampling tube.
The trend index calculation is that the average value calculation is carried out on the concentration of each type of smoke collected by each sampling point of the sampling pipe to obtain the time average concentration of each type of smoke of each sampling point of the sampling pipe, the time average concentration of each type of smoke of each sampling point of the sampling pipe is fitted into a curve according to the distance between each sampling point and an air inlet of the sampling pipe as an abscissa, the basic displacement concentration change curve of each type of smoke of the sampling pipe is obtained, the slope of the basic displacement concentration change curve of each sampling point of each type of smoke is obtained from the basic displacement concentration change curve of each type of smoke of the sampling pipe through the image recognition technology, the trend index corresponding to the slope of each basic displacement concentration change curve is obtained from a database, and then the smoke trend index of each type of smoke of each sampling point of the sampling pipe is obtained through the weighted calculation.
The offset index is calculated by carrying out average calculation on the time average concentration of various types of smoke of each sampling point of the sampling tube to obtain the displacement average concentration of various types of smoke, obtaining the maximum collection concentration and the minimum collection concentration of various types of smoke of each sampling point from the concentration of various types of smoke collected by each sampling point of the sampling tube, subtracting the difference between the displacement average concentrations of the corresponding types of smoke from the maximum collection concentration of various types of smoke of each sampling point, dividing the difference between the maximum collection concentration of various types of smoke of each sampling point and the minimum collection concentration of the corresponding type of smoke, obtaining the smoke offset index of various types of smoke of each sampling point of the sampling tube, and carrying out weighted calculation to obtain the smoke offset index of each sampling point of the sampling tube.
Substituting the flue gas fluctuation index, the flue gas trend index and the flue gas offset index of each sampling point of the sampling pipe into a basic sampling evaluation index calculation formula to obtain a basic sampling evaluation index of each sampling point of the sampling pipe, and if the basic sampling evaluation index of a certain sampling point in the sampling pipe is greater than or equal to a preset standard sampling evaluation index, marking the sampling point as an effective sampling point so as to obtain the concentration of various types of flue gas acquired by each effective sampling point.
It should be noted that, through the basic sampling evaluation index calculation formula, the influence of the flue gas fluctuation index, the flue gas trend index and the flue gas offset index of the sampling data of each acquisition point of the sampling tube on the sampling precision can be analyzed, the larger the basic sampling evaluation index is, the larger the sampling precision is, the basic sampling evaluation index calculation formula expression is: , wherein, The basic sampling evaluation index of the sampling tube sampling point a is obtained, a is the number of the sampling point, the numerical value of a is a positive integer, 、 AndRespectively the flue gas fluctuation index, the flue gas trend index and the flue gas deviation index of the sampling pipe sampling point a, 、 AndRespectively a preset standard smoke fluctuation index, a standard smoke trend index and a standard smoke deviation index, 、 AndRespectively a preset standard smoke fluctuation index, a standard smoke trend index and a standard smoke deviation index, , , , 。
Standard parameters 、 AndSetting procedure and standard parameters of (a)Is the same as the setting process, e.g0.8 Part,Is 0.9 andWeight factor of 0.9 、 AndIs set up by the process and weight factor of (2)Is the same as the setting process, e.gIs 0.2 part,Is 0.2 and0.6.
In a specific embodiment, the resampling scheme is set, and the specific setting process comprises the steps of carrying out average value calculation on the concentration of each type of flue gas collected by each effective collecting point to obtain the collecting point concentration of each type of flue gas of each effective collecting point, carrying out average value calculation on the collecting point concentration of each type of flue gas of each effective collecting point to obtain the collecting tube concentration of each type of flue gas, carrying out average value calculation on the basic sampling evaluation index of each collecting point of the sampling tube to obtain the sampling tube sampling evaluation index of the current sampling tube.
Acquiring sampling tube sampling evaluation index intervals and various smoke concentrations of various smoke concentration experiment scenes from a database, carrying out vector conversion on various smoke concentrations of various smoke concentration experiment scenes and collecting tube concentrations of various smoke to obtain smoke characteristic vectors of various smoke concentration experiment scenes and smoke characteristic vectors of current collecting tubes, and carrying out cosine similarity calculation on the smoke characteristic vectors of various smoke concentration experiment scenes and the smoke characteristic vectors of the current collecting tubes to obtain the similarity of the current collecting tubes of various smoke concentration experiment scenes.
If the sampling tube sampling evaluation index of the current sampling tube belongs to a sampling tube sampling evaluation index interval corresponding to a certain type of flue gas concentration experimental scene, the sampling tube belongs to an effective flue gas concentration experimental scene, so that the similarity of the current sampling tube of each effective flue gas concentration experimental scene is obtained, and the effective flue gas concentration experimental scene with the maximum similarity of the current sampling tube is selected to be recorded as a preset experimental scene.
Obtaining preset basic concentration in various kinds of smoke from a database, recording the type of smoke as the effective smoke type of the current sampling tube when the concentration of the collecting tube in the various kinds of smoke of the current sampling tube is larger than the corresponding preset basic concentration, obtaining various kinds of effective smoke of the current sampling tube, obtaining a concentration ratio stability index corresponding to various experimental wind speeds of a preset experimental scene and a concentration variation coefficient of various kinds of effective smoke of the current sampling tube from the database, substituting the concentration ratio stability index corresponding to various experimental wind speeds of the preset experimental scene and the concentration variation coefficient of various kinds of effective smoke of the current sampling tube into a wind speed use stability index calculation formula to obtain wind speed use stability indexes of various experimental wind speeds of the preset experimental scene, and recording all experimental wind speeds of the preset experimental scene with the wind speed use stability index larger than the preset standard wind speed use stability index as various effective wind speeds.
It should be noted that, the wind speed using stability index calculation formula is: , wherein, The stability index is used for the wind speed of the experimental wind speed c of the preset experimental scene, c is the number of the experimental wind speed, the numerical value of c is a positive integer,The concentration ratio stability index of the wind speed c is tested for a preset test scene,For presetting x kinds of effective flue gas variation coefficients of the experimental wind speed c of the experimental scene, x is the type number of the effective flue gas, , The value of m is the total number of types of effective flue gas,AndRespectively a preset standard concentration ratio stability index and a standard smoke variation coefficient,AndRespectively a preset concentration ratio stability index weight factor and a smoke variation coefficient weight factor, , , , Is the weight factor of the effective smoke of the x types, , 。
The concentration ratio stability index is that the environment concentration of various kinds of smoke in a preset experiment scene experiment is set, after a target wind speed is applied, the collection concentration of various kinds of smoke in the preset experiment scene experiment is obtained through a collection tube, the collection concentration of various kinds of smoke in the preset experiment scene experiment is divided by the environment concentration of the corresponding smoke type, which is obtained through the collection tube, the concentration ratio of various kinds of smoke in the preset experiment scene experiment target wind speed is obtained, the concentration ratio of various kinds of smoke in the preset experiment scene experiment target wind speed is subjected to weighted calculation, the concentration ratio stability index of the preset experiment scene target experiment wind speed is obtained, and the concentration ratio stability index of various experiment wind speeds in the preset experiment scene is obtained.
Standard parametersAndSetting procedure and standard parameters of (a)Is the same as the setting process, e.gIs 0.91 andWeight factor of 0.97 、 AndIs set up by the process and weight factor of (2)Is the same as the setting process, e.gIs 0.45 part,Is 0.55 and0.1.
The resampling scheme is that the wind speed of the air inlet of the sampling tube is adjusted through a flow adjusting valve of a fan at the tail end of the sampling tube, the wind speed of the air inlet of the sampling tube is adjusted to be the gear of each effective wind speed, and the flue gas data acquisition of each effective wind speed is respectively carried out at the gear of each effective wind speed.
And the resampling analysis module is used for obtaining each effective wind speed of the sampling tube according to the resampling scheme, setting each effective wind speed through the flow regulating valve, resampling, collecting the flue gas resampling environment data of each sampling point of each effective wind speed, analyzing the resampling flue gas data of each sampling point of each effective wind speed of the sampling tube, and carrying out early warning.
In a specific embodiment, the resampling environment data of the flue gas at each sampling point for collecting the effective wind speed is specifically collected by the steps that the resampling flue gas data of each sampling point for collecting the effective wind speed of a sampling tube is the concentration of each type of flue gas collected at each sampling point for collecting the effective wind speed of the sampling tube, the electrochemical sensor for each sampling point of the sampling tube is used for collecting the basic concentration of each type of flue gas collected at each sampling point for collecting the effective wind speed of the sampling tube, and the basic concentration is multiplied by a sampling correction factor to obtain the concentration of each type of flue gas collected at each sampling point for each effective wind speed of the sampling tube.
In a specific embodiment, the resampling flue gas data of each sampling point of each effective wind speed of the sampling tube is analyzed, and the specific analysis process is that the concentration of each type of flue gas collected by each sampling point of each effective wind speed of the sampling tube is subjected to fluctuation index calculation, trend index calculation and offset index calculation to obtain the flue gas fluctuation index, the flue gas trend index and the flue gas offset index of each sampling point of each effective wind speed of the sampling tube.
Substituting the smoke fluctuation index, the smoke trend index and the smoke deviation index of each sampling point of each effective wind speed of the sampling tube into a resampling evaluation index calculation formula to obtain a resampling evaluation index of each sampling point of each effective wind speed of the sampling tube, marking the sampling point as an available sampling point if the basic sampling evaluation index of a certain sampling point of a certain effective wind speed in the sampling tube is greater than or equal to a preset standard sampling evaluation index, obtaining each available sampling point of each effective wind speed of the sampling tube, counting to obtain each available sampling point number of each effective wind speed of the sampling tube, dividing each available sampling point number of each effective wind speed of the sampling tube by the total number of the sampling points, and obtaining the availability of each effective wind speed of the sampling tube, and marking the effective wind speed as the available wind speed if the availability of a certain effective wind speed of the sampling tube is greater than the preset standard availability, thereby obtaining the various concentrations of each available sampling point of each available wind speed of the sampling tube.
It should be noted that, the expression of the resampling evaluation index calculation formula is: , wherein, The basic sampling evaluation index of the acquisition point a of the effective wind speed b of the sampling tube, b is the number of the effective wind speed, the numerical value of b is a positive integer, 、 AndAnd the flue gas fluctuation index, the flue gas trend index and the flue gas deviation index of the collection point a of the effective wind speed b of the sampling tube are respectively shown.
Substituting the concentration of various types of smoke at each available collection point of each available wind speed of the sampling tube into a smoke analysis early warning index calculation formula to obtain the smoke analysis early warning index of the sampling tube.
It should be noted that, the formula expression of the flue gas analysis early warning index is: , wherein, The smoke analysis early warning index of the sampling tube is adopted,The concentration of t types of flue gas at an available acquisition point s of the available wind speed r of the sampling tube, r is the number of the available wind speed, , U is the total type number of the available wind speeds, s is the number of the available acquisition points, , V is the total number of available collection points, t is the type number of the flue gas, , W is the total type number of the flue gas,Is the concentration of the preset standard flue gas, 、 AndRespectively a preset weight factor of the available wind speed r, a preset weight factor of the available acquisition point s and a preset weight factor of the t-class flue gas, , , , , , 。
Standard parametersSetting procedure and standard parameters of (a)Is the same as the setting process, e.gWeight factor of 0.67 、 AndIs set up by the process and weight factor of (2)Is the same as the setting process, e.gIs 0.4 part,Is 0.5 and0.5.
In one embodiment, the early warning is performed by performing early warning if the smoke analysis early warning index of the sampling tube is larger than the preset standard smoke analysis early warning index, and prompting a user of a preset experimental scene of the current acquisition environment.
The database is used for storing sampling correction factors corresponding to the influence evaluation indexes, environment fluctuation evaluation index intervals corresponding to the use schemes of the smoke collectors, sampling evaluation index intervals of sampling pipes of various smoke concentration experiment scenes, various smoke concentrations of various smoke concentration experiment scenes, preset basic concentrations in various smoke, concentration ratio stability indexes corresponding to various experiment wind speeds of the preset experiment scenes, concentration variation coefficients of various effective smoke of the current sampling pipes corresponding to various experiment wind speeds of the preset experiment scenes, use index correction factors corresponding to the use times of the current filter, basic use indexes of the filter corresponding to various pressure differences and trend indexes corresponding to the slopes of the basic displacement concentration change curves.
According to the figure 2, the invention provides a portable flue gas analysis method, which comprises the following steps of firstly, analyzing a sampling tube, namely collecting interference data of a sampling tube basic instrument, analyzing the interference data of the sampling tube basic instrument to obtain an influence evaluation index of the sampling tube, and further setting a sampling tube use scheme.
And secondly, basic sampling analysis, namely acquiring basic environment information according to a sampling tube use scheme, setting a smoke collector use scheme according to the basic environment information, setting each sampling point of the sampling tube according to the smoke collector use scheme so as to perform basic sampling, acquiring basic sampling smoke data of each sampling point of the sampling tube, analyzing the basic sampling smoke data of each sampling point of the sampling tube to obtain environment basic smoke data and basic sampling evaluation indexes, and setting a resampling scheme according to the environment basic smoke data.
And thirdly, resampling and analyzing, namely obtaining each effective wind speed of the sampling tube according to a resampling scheme, setting each effective wind speed through a flow regulating valve, resampling, collecting the flue gas resampling environment data of each sampling point of each effective wind speed, analyzing the resampling flue gas data of each sampling point of each effective wind speed of the sampling tube, and carrying out early warning.
The foregoing is merely illustrative and explanatory of the principles of the invention, as various modifications and additions may be made to the specific embodiments described, or similar arrangements may be substituted by those skilled in the art, without departing from the principles of the invention or beyond the scope of the invention as defined in the description.
Claims (10)
1. A portable smoke analysis device, comprising the following modules:
the sampling tube analysis module is used for collecting interference data of a sampling tube basic instrument, analyzing the interference data of the sampling tube basic instrument, obtaining an influence evaluation index of the sampling tube, and further setting a sampling tube use scheme;
The basic sampling analysis module is used for acquiring basic environment information according to a sampling tube use scheme, setting a smoke collector use scheme according to the basic environment information, setting each sampling point of the sampling tube according to the smoke collector use scheme so as to perform basic sampling, collecting basic sampling smoke data of each sampling point of the sampling tube, analyzing the basic sampling smoke data of each sampling point of the sampling tube to obtain environment basic smoke data, and setting a resampling scheme according to the environment basic smoke data;
And the resampling analysis module is used for obtaining each effective wind speed of the sampling tube according to the resampling scheme, setting each effective wind speed through the flow regulating valve, resampling, collecting the flue gas resampling environment data of each sampling point of each effective wind speed, analyzing the resampling flue gas data of each sampling point of each effective wind speed of the sampling tube, and carrying out early warning.
2. The portable flue gas analysis device according to claim 1, wherein the analysis of the interference data of the sampling tube base instrument is performed by the following steps:
The interference data of the basic instrument of the sampling tube comprises an adsorption evaluation index, a filter use index and a surface foreign matter index of the sampling tube, and the adsorption evaluation index, the filter use index and the surface foreign matter index of the sampling tube are substituted into a calculation formula of an influence evaluation index of the sampling tube to obtain the influence evaluation index of the sampling tube.
3. The portable flue gas analysis device according to claim 2, wherein the arrangement of the sampling tube using scheme comprises the following specific arrangement process:
if the influence evaluation index of the sampling tube is larger than the preset standard influence evaluation index of the sampling tube, replacing the sampling tube to obtain a new sampling tube, further re-collecting interference data of a basic instrument of the new sampling tube, analyzing to obtain the influence evaluation index of the new sampling tube, recording the influence evaluation index as the influence evaluation index of sampling tube, and if the influence evaluation index of the sampling tube is smaller than or equal to the preset standard influence evaluation index of the sampling tube, recording the influence evaluation index of the sampling tube as the influence evaluation index of sampling tube, acquiring sampling correction factors corresponding to the influence evaluation indexes from a database, and further obtaining the sampling correction factors of sampling tube sampling;
The sampling tube using scheme is that if the sampling tube influence evaluation index is larger than a preset standard sampling tube influence evaluation index, sampling tube replacement is carried out, and if the sampling tube influence evaluation index is smaller than or equal to the preset standard sampling tube influence evaluation index, the sampling tube is directly used, and meanwhile follow-up sampling data are corrected according to sampling correction factors of sampling of the sampling tube.
4. A portable smoke analysis device according to claim 3, wherein the smoke collector is arranged according to the following scheme:
The basic environment information comprises a temperature fluctuation index, a humidity fluctuation index, an airflow velocity fluctuation index and an airflow characteristic correction index of the sampling environment, the temperature fluctuation index, the humidity fluctuation index, the airflow velocity fluctuation index and the airflow characteristic correction index of the sampling environment are substituted into an environment fluctuation assessment index calculation formula to obtain an environment fluctuation assessment index of the sampling environment, an environment fluctuation assessment index interval corresponding to each smoke collector use scheme is obtained from a database, and if the environment fluctuation assessment index of the sampling environment belongs to the environment fluctuation assessment index interval corresponding to a certain smoke collector use scheme, the current sampling environment is indicated to be applicable to the smoke collector use scheme;
The smoke collector has the use scheme that the first collection point is arranged by taking the preset distance length as the distance from the first collection point to the inlet of the collection tube, the collection points are arranged by taking the preset interval length as the distance from the collection points, the positions of the collection points in the collection tube are arranged by taking the preset interval length as the distance from the collection points, and the probes of the collectors are arranged at the positions of the collection points.
5. The portable flue gas analyzer of claim 4, wherein the analysis of the basic sampled flue gas data at each sampling point of the sampling tube is performed as follows:
The basic sampling smoke data of each sampling point of the sampling tube is the concentration of each type of smoke collected by each sampling point of the sampling tube, and the concentration of each type of smoke collected by each sampling point of the sampling tube is subjected to fluctuation index calculation, trend index calculation and offset index calculation to obtain the smoke fluctuation index, the smoke trend index and the smoke offset index of each sampling point of the sampling tube;
substituting the flue gas fluctuation index, the flue gas trend index and the flue gas offset index of each sampling point of the sampling pipe into a basic sampling evaluation index calculation formula to obtain a basic sampling evaluation index of each sampling point of the sampling pipe, and if the basic sampling evaluation index of a certain sampling point in the sampling pipe is greater than or equal to a preset standard sampling evaluation index, marking the sampling point as an effective sampling point so as to obtain the concentration of various types of flue gas acquired by each effective sampling point.
6. The portable flue gas analysis device according to claim 5, wherein the setting up the resampling scheme comprises the following steps:
The method comprises the steps of carrying out average value calculation on the concentration of each type of flue gas collected by each effective collecting point to obtain the collecting point concentration of each type of flue gas of each effective collecting point, carrying out average value calculation on the collecting point concentration of each type of flue gas of each effective collecting point to obtain the collecting tube concentration of each type of flue gas, and carrying out average value calculation on the basic sampling evaluation index of each collecting point of the sampling tube to obtain the sampling evaluation index of the current sampling tube;
Acquiring sampling and evaluating index intervals and various smoke concentrations of sampling pipes of various smoke concentration experimental scenes from a database, performing vector conversion on various smoke concentrations of various smoke concentration experimental scenes and the concentration of collecting pipes of various smoke to obtain smoke characteristic vectors of various smoke concentration experimental scenes and smoke characteristic vectors of current collecting pipes, and performing cosine similarity calculation on the smoke characteristic vectors of various smoke concentration experimental scenes and the smoke characteristic vectors of the current collecting pipes to obtain the similarity of the current collecting pipes of various smoke concentration experimental scenes;
if the sampling tube sampling evaluation index of the current collecting tube belongs to a sampling tube sampling evaluation index interval corresponding to a certain type of flue gas concentration experimental scene, indicating that the collecting tube belongs to an effective flue gas concentration experimental scene, further obtaining the similarity of the current collecting tube of each effective flue gas concentration experimental scene, and selecting the effective flue gas concentration experimental scene with the maximum similarity of the current collecting tube as a preset experimental scene;
Acquiring preset basic concentration in various kinds of smoke from a database, recording the type of smoke as an effective smoke type of a current sampling tube when the concentration of a collecting tube in various kinds of smoke of the current sampling tube is larger than the corresponding preset basic concentration, so as to acquire various kinds of effective smoke of the current sampling tube, acquiring a concentration ratio stability index corresponding to various experimental wind speeds of a preset experimental scene and a concentration variation coefficient of various kinds of effective smoke of the current sampling tube from the database, substituting the concentration ratio stability index corresponding to various experimental wind speeds of the preset experimental scene and the concentration variation coefficient of various kinds of effective smoke of the current sampling tube into a wind speed use stability index calculation formula to acquire a wind speed use stability index of various experimental wind speeds of the preset experimental scene, and recording various experimental wind speeds of the preset experimental scene with the wind speed use stability index larger than a preset standard wind speed use stability index as various effective wind speeds;
the resampling scheme is that the wind speed of the air inlet of the sampling tube is adjusted through a flow adjusting valve of a fan at the tail end of the sampling tube, the wind speed of the air inlet of the sampling tube is adjusted to be the gear of each effective wind speed, and the flue gas data acquisition of each effective wind speed is respectively carried out at the gear of each effective wind speed.
7. The portable flue gas analyzer of claim 6, wherein the analysis of resampled flue gas data at each sampling point for each effective wind speed of the sampling tube is performed as follows:
The resampling smoke data of each sampling point of each effective wind speed of the sampling tube is the concentration of each type of smoke collected by each sampling point of each effective wind speed of the sampling tube, the resampling smoke data of each sampling point of each effective wind speed of the sampling tube is analyzed according to the analysis process of the basic sampling smoke data of each sampling point, the resampling evaluation index of each sampling point of each effective wind speed of the sampling tube is obtained, and then each available sampling point of each available wind speed of the sampling tube is judged according to the judgment method of each effective sampling point, so that the concentration of each type of smoke of each available sampling point of each available wind speed of the sampling tube is obtained;
substituting the concentration of various types of smoke at each available collection point of each available wind speed of the sampling tube into a smoke analysis early warning index calculation formula to obtain the smoke analysis early warning index of the sampling tube.
8. The portable smoke analysis device of claim 7, wherein the pre-warning is performed by the following specific pre-warning process:
if the smoke analysis early warning index of the sampling tube is larger than the preset standard smoke analysis early warning index, early warning is carried out, and meanwhile a user is prompted of a preset experimental scene of the current acquisition environment.
9. The portable smoke analysis device according to claim 1, further comprising a database for storing sampling correction factors corresponding to each influence evaluation index, an environment fluctuation evaluation index interval corresponding to each smoke collector usage scheme, sampling evaluation index intervals of sampling tubes of each smoke concentration experiment scene, each smoke concentration of each smoke concentration experiment scene, preset basic concentration in each smoke, concentration ratio stability index corresponding to each experiment wind speed of the preset experiment scene, and concentration variation coefficients of each effective smoke of the current sampling tube corresponding to each experiment wind speed of the preset experiment scene.
10. A smoke analysis method using the portable smoke analysis device of any one of claims 1-9, comprising the steps of:
Step one, analyzing a sampling tube, namely collecting interference data of a sampling tube basic instrument, analyzing the interference data of the sampling tube basic instrument to obtain an influence evaluation index of the sampling tube, and setting a sampling tube use scheme;
acquiring basic environment information according to a sampling tube use scheme, setting a smoke collector use scheme according to the basic environment information, setting each sampling point of the sampling tube according to the smoke collector use scheme, thus performing basic sampling, acquiring basic sampling smoke data of each sampling point of the sampling tube, analyzing the basic sampling smoke data of each sampling point of the sampling tube, obtaining environment basic smoke data and basic sampling evaluation indexes, and setting a resampling scheme according to the environment basic smoke data;
And thirdly, resampling and analyzing, namely obtaining each effective wind speed of the sampling tube according to a resampling scheme, setting each effective wind speed through a flow regulating valve, resampling, collecting the flue gas resampling environment data of each sampling point of each effective wind speed, analyzing the resampling flue gas data of each sampling point of each effective wind speed of the sampling tube, and carrying out early warning.
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