Portable flue gas analysis device and method

Abstract

The present invention discloses a portable flue gas analysis device and method, which relate to the technical field of flue gas analysis. The device of the present invention comprises three modules: a sampling tube analysis module, a basic sampling analysis module and a resampling analysis module. The present invention first sets a sampling tube usage plan through the sampling tube analysis module, then collects basic environmental information according to the sampling tube usage plan through the basic sampling analysis module, sets a flue gas collector usage plan, performs basic sampling, sets a resampling plan according to the basic sampling data analysis results, and finally sets each effective wind speed according to the resampling plan through the resampling analysis module for resampling, collects flue gas resampling environmental data, analyzes the resampled flue gas data, issues an early warning and prompts a preset experimental scenario of the current collection environment. The present invention flexibly adjusts the collector settings to make the collection process more in line with the actual environment, thereby enhancing the adaptability of the device to complex environments.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas analysis, and in particular to a portable flue gas analysis device and method. Background Art

[0002] Prior art, such as the invention patent application with announcement number CN106018703B, discloses a flue gas analysis system and method. The invention provides a flue gas analysis system, which is connected to the pollution emission source through a heating pipeline, and includes a control device and a sampling device and an analysis device that are detachably connected to the control device respectively. The sampling device includes a high-temperature processing unit and a normal temperature processing unit. The normal temperature processing unit includes a cooling and dehydration subunit and a sampling pump. The high-temperature processing unit is connected to the cooling and dehydration subunit through the analysis device. This application avoids the use of high-cost high-temperature sampling pumps or jet pumps that require induced gas by using a cooling and dehydration subunit and a conventional sampling pump, thereby improving the stability and controllability of sampling and reducing costs. At the same time, the system adopts a detachable and separable design, which is not only suitable for online monitoring, but also for portable monitoring. By replacing the analysis device, analysis of different components can be achieved, thereby enhancing the versatility of the system.

[0003] Regarding the above solution, there are the following technical problems: 1. The above invention does not detect and evaluate the status of the sampling tube itself, and does not analyze the adsorption data, filter condition data, and surface foreign matter data of the sampling tube, which may cause the sampling data to be affected by changes in the performance of the sampling tube, thereby reducing the accuracy of the analysis.

[0004] 2. The above scheme only cools and removes water from the sampled flue gas. However, when setting up the sampling scheme, the above scheme does not fully consider the impact of fluctuating factors such as temperature, humidity, and airflow velocity in the sampling environment on flue gas collection and analysis. The sampling process will not be in a stable environmental state. The above scheme may make the collection scheme unable to adapt to the complex and changeable actual environment, reducing the effectiveness of the sampling data.

[0005] 3. The other party's invention did not analyze the sampling data of different collectors, and it was impossible to determine the validity of the sampling data. At the same time, the above scheme did not study and optimize the impact of different flue gas concentration scenarios and experimental wind speeds on the sampling effect. It was impossible to collect data under the optimal wind speed conditions, which affected the accuracy and validity of the data. Summary of the Invention

[0006] In view of the above-mentioned technical deficiencies, the object of the present invention is to provide a portable flue gas analysis device and method.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solution: The present invention provides a portable flue gas analysis device, including the following modules: a sampling tube analysis module, which is used to collect the interference data of the basic instrument of the sampling tube, analyze the interference data of the basic instrument of the sampling tube, obtain the sampling tube impact evaluation index, and then set the sampling tube usage plan.

[0008] The basic sampling and analysis module is used to collect basic environmental information according to the sampling tube usage plan, set the flue gas collector usage plan according to the basic environmental information, and then set the sampling points of the sampling tube according to the flue gas collector usage plan to perform basic sampling, collect basic sampling flue gas data at each sampling point of the sampling tube, analyze the basic sampling flue gas data at each sampling point of the sampling tube, obtain environmental basic flue gas data, and set a resampling plan based on the environmental basic flue gas data.

[0009] The resampling analysis module is used to obtain the effective wind speeds of the sampling tube according to the resampling plan, set the effective wind speeds through the flow control valve, and thus perform resampling, collect the flue gas resampling environmental data of each collection point at each effective wind speed, analyze the resampled flue gas data of each collection point at each effective wind speed of the sampling tube, and issue an early warning.

[0010] Preferably, the resampling scheme is set up, and the specific setting process is as follows: the concentration of each type of flue gas collected each time at each effective collection point is averaged to obtain the collection point concentration of each type of flue gas at each effective collection point, the collection point concentration of each type of flue gas at each effective collection point is averaged to obtain the collection tube concentration of each type of flue gas, and the basic sampling evaluation index of each collection point of the sampling tube is averaged to obtain the sampling tube sampling evaluation index of the current sampling tube.

[0011] The sampling evaluation index intervals of the sampling tubes and various smoke concentrations of various smoke concentration experimental scenarios are obtained from the database. The various smoke concentrations of various smoke concentration experimental scenarios and the collection tube concentrations of various smoke are vector-converted to obtain the smoke feature vectors of various smoke concentration experimental scenarios and the smoke feature vectors of the current collection tube. The cosine similarity calculation is performed on the smoke feature vectors of various smoke concentration experimental scenarios and the smoke feature vectors of the current collection tube to obtain the current collection tube similarity of various smoke concentration experimental scenarios.

[0012] If the sampling tube sampling evaluation index of the current collection tube belongs to the sampling tube sampling evaluation index interval corresponding to a certain type of flue gas concentration experimental scene, it indicates that this type of collection tube belongs to a valid flue gas concentration experimental scene, and then the current collection tube similarity of each valid flue gas concentration experimental scene is obtained, and the valid flue gas concentration experimental scene with the maximum current collection tube similarity is selected and recorded as the preset experimental scene.

[0013] Obtain the preset basic concentration of each type of flue gas from the database. When the collection tube concentration of each type of flue gas in the current sampling tube is greater than the corresponding preset basic concentration, record this type of flue gas as the effective flue gas type of the current sampling tube, so as to obtain the various types of effective flue gas in the current sampling tube. Obtain the concentration ratio stability index corresponding to each experimental wind speed in the preset experimental scenario and the concentration variation coefficient of each type of effective flue gas in the current sampling tube from the database. Substitute the concentration ratio stability index corresponding to each experimental wind speed in the preset experimental scenario and the concentration variation coefficient of each type of effective flue gas in the current sampling tube into the wind speed usage stability index calculation formula to obtain the wind speed usage stability index of each experimental wind speed in the preset experimental scenario. Record the experimental wind speeds in the preset experimental scenario whose wind speed usage stability index is greater than the preset standard wind speed usage stability index as the effective wind speeds.

[0014] The resampling scheme is: the wind speed at the air inlet of the sampling tube is adjusted through the flow control valve of the fan at the end of the sampling tube, the wind speed at the air inlet of the sampling tube is adjusted to each effective wind speed gear, and the flue gas data of each effective wind speed is collected at each effective wind speed gear.

[0015] On the other hand, the present invention provides a portable flue gas analysis method, comprising the following steps: Step 1, sampling tube analysis: collecting sampling tube basic instrument interference data, analyzing the sampling tube basic instrument interference data, obtaining a sampling tube impact assessment index, and then setting a sampling tube usage plan.

[0016] Step 2: Basic sampling analysis: According to the sampling tube usage plan, basic environmental information is collected. According to the basic environmental information, the flue gas collector usage plan is set. Then, according to the flue gas collector usage plan, each collection point of the sampling tube is set to perform basic sampling, and basic sampling flue gas data of each collection point of the sampling tube is collected. The basic sampling flue gas data of each collection point of the sampling tube is analyzed to obtain the environmental basic flue gas data and the basic sampling evaluation index. According to the environmental basic flue gas data, a resampling plan is set.

[0017] Step 3: Resampling analysis: According to the resampling scheme, the effective wind speeds of the sampling tube are obtained, and the effective wind speeds are set through the flow control valve to perform resampling. The flue gas resampling environmental data of each collection point at each effective wind speed is collected, and the resampled flue gas data of each collection point at each effective wind speed of the sampling tube is analyzed to issue an early warning.

[0018] The beneficial effects of the present invention are: 1. The present invention first sets a sampling tube usage plan through a sampling tube analysis module, and then collects basic environmental information according to the sampling tube usage plan through a basic sampling analysis module, sets a flue gas collector usage plan, performs basic sampling, and sets a resampling plan based on the basic sampling data analysis results. Finally, the resampling analysis module sets each effective wind speed according to the resampling plan for resampling, collects flue gas resampling environmental data, analyzes the resampled flue gas data, issues an early warning, and prompts the preset experimental scenario of the current collection environment. The present invention flexibly adjusts the collector settings to make the collection process more in line with the actual environment and enhances the adaptability of the device to complex environments.

[0019] 2. The present invention collects the interference data of the basic instrument of the sampling tube and calculates the sampling tube impact assessment index, which can timely determine whether the sampling tube needs to be replaced. At the same time, it obtains the sampling correction factor to correct the subsequent sampling data, thereby improving the accuracy of the sampling data and making up for the deficiency of not considering the status of the sampling tube.

[0020] 3. The present invention calculates the environmental fluctuation assessment index based on basic environmental information, thereby setting a suitable smoke collector usage plan and sampling tube collection points, so that the device can better adapt to different sampling environments, increase the amount of sampled data, and reduce the possibility of excessive errors in the data caused by insufficient environmental adaptability.

[0021] 4. The present invention sets a flue gas scene, performs sampling wind speed compensation, and performs resampling at different effective wind speeds, fully considering the impact of different wind speeds on the sampling effect, optimizing the sampling process, and improving the accuracy of the sampling data. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a schematic diagram of the structural connection of the device of the present invention.

[0024] Figure 2 The figure is a schematic flow chart of the steps for implementing the method of the present invention. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] according to Figure 1 As shown, the present invention provides a portable flue gas analysis device, which includes the following modules: a sampling tube analysis module, a basic sampling analysis module, a resampling analysis module and a database.

[0027] The basic sampling analysis module is connected to the sampling tube analysis module and the resampling analysis module respectively. The sampling tube analysis module, the basic sampling analysis module and the resampling analysis module are all connected to a database.

[0028] The sampling tube analysis module is used to collect and analyze the interference data of the basic instruments of the sampling tubes, obtain the sampling tube impact assessment index, and then set the sampling tube usage plan.

[0029] In a specific embodiment, the specific collection process of the sampling tube basic instrument interference data is as follows: the sampling tube basic instrument interference data includes the adsorption evaluation index, filter usage index and surface foreign matter index of the sampling tube.

[0030] A particle counter is used to detect the concentration of particles of various sizes in the gas before and after the filter of the sampling tube. The difference calculation is used to obtain the concentration difference of particles of various sizes. The concentration difference of particles of various sizes is divided by the concentration of particles before the filter of the corresponding particle size to obtain the retention efficiency of particles of various sizes. The filter retention efficiency is obtained by weighted calculation. The filter retention efficiency is recorded as the adsorption evaluation index of the sampling tube. The pressure difference at both ends of the filter is measured by a pressure sensor. The usage index correction factor corresponding to the current number of times the filter is used and the basic usage index of the filter corresponding to each pressure difference are obtained from the database. The basic usage index and usage index correction factor of the filter are obtained. The basic usage index of the filter is multiplied by the usage index correction factor to obtain the filter usage index of the sampling tube.

[0031] The surface image of the sampling tube is collected by a camera, and the similarity between the surface image of the sampling tube and each surface foreign matter index image is obtained through image recognition technology. The surface foreign matter index of the surface foreign matter index image with the highest similarity is recorded as the surface foreign matter index of the sampling tube.

[0032] In a specific embodiment, the sampling tube basic instrument interference data is analyzed, and the specific analysis process is as follows: the adsorption evaluation index, filter usage index and surface foreign matter index of the sampling tube are substituted into the sampling tube impact evaluation index calculation formula to obtain the sampling tube impact evaluation index.

[0033] It should be noted that the sampling tube impact assessment index calculation formula can be used to analyze the influence of the sampling tube adsorption assessment index, filter usage index and surface foreign matter index on the sampling accuracy of the sampling tube, thereby increasing the validity of the sampling tube sampling data. The sampling tube impact assessment index calculation formula is expressed as follows: ,in, is the sampling tube impact assessment index, 、 and They are the adsorption evaluation index of the sampling tube, the filter usage index and the surface foreign matter index. 、 and They are the preset standard adsorption evaluation index, standard filter usage index and standard surface foreign matter index. 、 and They are the preset adsorption evaluation index weight factor, filter usage index weight factor and surface foreign matter index weight factor, respectively. , , , .

[0034] Standard parameters 、 and They are the adsorption evaluation index threshold for normal use of the sampling tube, the filter usage index threshold, and the surface foreign matter index threshold. When the adsorption evaluation index is less than the threshold, it indicates that the flue gas data is greatly affected by the sampling tube. When the filter usage index is greater than the threshold and the surface foreign matter index is greater than the threshold, it indicates that the flue gas data is greatly affected by the sampling tube. The specific values are set by the staff, for example 0.98, 0.78 and The weight factor is 0.12. 、 and The specific values of are set by the staff, such as 0.4, is 0.3 and is 0.3.

[0035] In a specific embodiment, the sampling tube usage plan is set up, and the specific setting process is as follows: if the sampling tube impact assessment index is greater than the preset standard sampling tube impact assessment index, the sampling tube is replaced to obtain a new sampling tube, and then the basic instrument interference data of the new sampling tube is re-collected, and the new sampling tube impact assessment index is analyzed to obtain the new sampling tube impact assessment index, which is recorded as the impact assessment index of sampling tube sampling; if the sampling tube impact assessment index is less than or equal to the preset standard sampling tube impact assessment index, the sampling tube impact assessment index is recorded as the impact assessment index of sampling tube sampling, and the sampling correction factor corresponding to each impact assessment index is obtained from the database, and then the sampling correction factor of sampling tube sampling is obtained.

[0036] It should be noted that the standard sampling tube impact assessment index is the impact assessment index threshold for normal use of the sampling tube. When the impact assessment index is greater than the threshold, it indicates that the flue gas data is greatly affected by the sampling tube, and the error caused by the collection cannot be compensated by the correction factor. The specific value is set by the staff.

[0037] The sampling tube usage plan is: if the sampling tube impact assessment index is greater than the preset standard sampling tube impact assessment index, the sampling tube is replaced; if the sampling tube impact assessment index is less than or equal to the preset standard sampling tube impact assessment index, the sampling tube is used directly, and the subsequent sampling data is corrected according to the sampling correction factor of the sampling tube sampling.

[0038] The basic sampling and analysis module is used to collect basic environmental information according to the sampling tube usage plan, set the flue gas collector usage plan according to the basic environmental information, and then set the sampling points of the sampling tube according to the flue gas collector usage plan to perform basic sampling, collect basic sampling flue gas data at each sampling point of the sampling tube, analyze the basic sampling flue gas data at each sampling point of the sampling tube, obtain environmental basic flue gas data, and set a resampling plan based on the environmental basic flue gas data.

[0039] In a specific embodiment, the basic environmental information is collected, and the specific collection process is as follows: the basic environmental information includes the temperature fluctuation index, humidity fluctuation index, airflow velocity fluctuation index and airflow characteristic correction index of the sampling environment.

[0040] The temperature, humidity and air flow rate of each collection within the preset time are collected, and the temperature variation coefficient, humidity variation coefficient and air flow rate variation coefficient of the sampling environment are calculated by the coefficient of variation algorithm. The temperature variation coefficient, humidity variation coefficient and air flow rate variation coefficient of the sampling environment are recorded as the temperature fluctuation index, humidity fluctuation index and air flow rate fluctuation index of the sampling environment respectively.

[0041] It should be noted that the coefficient of variation is a normalized measure of the degree of discreteness of a probability distribution. The coefficient of variation algorithm is an existing technology and can be found on the Internet, so it will not be described in detail.

[0042] The airflow characteristic information of the sampling environment is collected by the anemometer, and the airflow characteristic vector of the sampling environment is obtained after vectorization. The characteristic vector of each characteristic correction index airflow is obtained from the database, and the cosine similarity calculation is performed to obtain the sampling environment similarity of each characteristic correction index airflow. The characteristic correction index of the airflow with the maximum sampling environment similarity is selected as the characteristic correction index of the sampling environment.

[0043] It should be noted that the airflow characteristic information includes but is not limited to airflow direction changes, vortex formation, and airflow stratification.

[0044] In a specific embodiment, the smoke collector usage plan is set up, and the specific analysis process is as follows: the temperature fluctuation index, humidity fluctuation index, airflow velocity fluctuation index and airflow characteristic correction index of the sampling environment are substituted into the environmental fluctuation assessment index calculation formula to obtain the environmental fluctuation assessment index of the sampling environment, and the environmental fluctuation assessment index interval corresponding to each smoke collector usage plan is obtained from the database. If the environmental fluctuation assessment index of the sampling environment belongs to the environmental fluctuation assessment index interval corresponding to a certain smoke collector usage plan, it indicates that the current sampling environment is suitable for the smoke collector usage plan.

[0045] It should be noted that the error analysis of the temperature fluctuation index, humidity fluctuation index and airflow velocity fluctuation index on the collector sampling can be analyzed through the environmental fluctuation assessment index calculation formula. The larger the environmental fluctuation assessment index, the greater the probability of excessive error in subsequent collection tube sampling. More collection point data analysis is required to ensure collection accuracy. The environmental fluctuation assessment index calculation formula is expressed as follows: ,in, is the environmental volatility assessment index, 、 、 and They are the temperature fluctuation index, humidity fluctuation index, airflow velocity fluctuation index and airflow characteristic correction index of the sampling environment, 、 and They are the preset standard temperature fluctuation index, standard humidity fluctuation index, and standard air flow velocity fluctuation index. 、 and They are the preset temperature fluctuation index weight factor, humidity fluctuation index weight factor, and air flow velocity fluctuation index weight factor, respectively. , , , .

[0046] Standard parameters 、 and The setup process and standard parameters The setup process is the same as for 0.87, 0.93 and is 0.97, the weight factor 、 and The setting process and weight factor The setup process is the same as for 0.3, is 0.3 and is 0.4.

[0047] The usage plan of the flue gas collector is: set the first collection point with the preset distance length as the distance from the first collection point to the entrance of the collection tube, set each collection point with the preset interval length as the distance between each collection point, set the position of each collection point in the sampling tube, and set the probe of each collector at the position of each collection point.

[0048] It should be noted that the preset distance length and the preset interval length are obtained by the staff through experiments, and the specific values are preset by the staff.

[0049] In a specific embodiment, the basic sampling flue gas data of each collection point of the sampling tube is collected, and the specific collection process is as follows: the basic sampling flue gas data of each collection point of the sampling tube is the concentration of each type of flue gas collected each time at each collection point of the sampling tube, and the basic concentration of each type of flue gas collected each time at each collection point of the sampling tube is collected by the electrochemical sensor at each collection point of the sampling tube, and the basic concentration is multiplied by the sampling correction factor to obtain the concentration of each type of flue gas collected each time at each collection point.

[0050] In a specific embodiment, the basic sampling flue gas data of each collection point of the sampling tube are analyzed, and the specific analysis process is as follows: the concentration of each type of flue gas collected at each collection point of the sampling tube is subjected to fluctuation index calculation, trend index calculation and deviation index calculation to obtain the flue gas fluctuation index, flue gas trend index and flue gas deviation index of each collection point of the sampling tube.

[0051] It should be noted that the fluctuation index is calculated as follows: the concentration of each type of flue gas collected at each collection point is calculated using the coefficient of variation algorithm to obtain the flue gas fluctuation index of each type of flue gas at each collection point of the sampling tube, and the flue gas fluctuation index of each collection point of the sampling tube is obtained by weighted calculation.

[0052] The trend index is calculated as follows: the concentrations of various types of flue gases collected at each sampling point of the sampling tube are averaged to obtain the time-averaged concentrations of various types of flue gases at each sampling point of the sampling tube; the time-averaged concentrations of various types of flue gases at each sampling point of the sampling tube are fitted into a curve with the distance between each sampling point and the air inlet of the sampling tube as the horizontal coordinate to obtain the sampling tube basic displacement concentration change curves of various types of flue gases; the slopes of the basic displacement concentration change curves of various types of flue gases at each sampling point are obtained from the sampling tube basic displacement concentration change curves of various types of flue gases through image recognition technology; the trend index corresponding to the slopes of the basic displacement concentration change curves is obtained from the database, and then the flue gas trend index of various types of flue gases at each sampling point of the sampling tube is obtained; and the flue gas trend index of each sampling point of the sampling tube is obtained by weighted calculation.

[0053] The deviation index is calculated as follows: the time-averaged concentrations of various types of flue gases at each collection point of the sampling tube are averaged to obtain the displacement average concentration of each type of flue gas; the maximum and minimum collection concentrations of each type of flue gas at each collection point are obtained from the concentrations of each type of flue gas collected at each collection point of the sampling tube; the difference between the maximum collection concentration of each type of flue gas at each collection point and the displacement average concentration of the corresponding flue gas type is subtracted; and the result is divided by the difference between the maximum collection concentration of each type of flue gas at each collection point and the minimum collection concentration of the corresponding flue gas type to obtain the flue gas deviation index of each type of flue gas at each collection point of the sampling tube; and the flue gas deviation index of each collection point of the sampling tube is obtained by weighted calculation.

[0054] The flue gas fluctuation index, flue gas trend index and flue gas deviation index of each sampling point in the sampling tube are substituted into the basic sampling evaluation index calculation formula to obtain the basic sampling evaluation index of each sampling point in the sampling tube. If the basic sampling evaluation index of a certain sampling point in the sampling tube is greater than or equal to the preset standard sampling evaluation index, the sampling point is recorded as a valid sampling point, thereby obtaining the concentration of each type of flue gas collected at each valid collection point.

[0055] It should be noted that the basic sampling evaluation index calculation formula can be used to analyze the influence of the smoke fluctuation index, smoke trend index and smoke deviation index of the sampling data at each sampling point of the sampling tube on the sampling accuracy. The larger the basic sampling evaluation index, the greater the sampling accuracy. The basic sampling evaluation index calculation formula is expressed as follows: ,in, is the basic sampling evaluation index of sampling point a of the sampling tube, a is the number of the sampling point, and the value of a is a positive integer. 、 and are the smoke fluctuation index, smoke trend index and smoke deviation index of sampling point a of the sampling tube, 、 and They are the preset standard smoke fluctuation index, standard smoke trend index and standard smoke deviation index, 、 and They are the preset standard smoke fluctuation index, standard smoke trend index and standard smoke deviation index, , , , .

[0056] Standard parameters 、 and The setup process and standard parameters The setup process is the same as for 0.8, is 0.9 and is 0.9, the weight factor 、 and The setting process and weight factor The setup process is the same as for 0.2, is 0.2 and is 0.6.

[0057] In a specific embodiment, the resampling scheme is set up, and the specific setting process is as follows: the concentration of each type of flue gas collected at each effective collection point is averaged to obtain the collection point concentration of each type of flue gas at each effective collection point; the collection point concentration of each type of flue gas at each effective collection point is averaged to obtain the collection tube concentration of each type of flue gas; the basic sampling evaluation index of each collection point of the sampling tube is averaged to obtain the sampling tube sampling evaluation index of the current sampling tube.

[0058] The sampling evaluation index intervals of the sampling tubes and various smoke concentrations of various smoke concentration experimental scenarios are obtained from the database. The various smoke concentrations of various smoke concentration experimental scenarios and the collection tube concentrations of various smoke are vector-converted to obtain the smoke feature vectors of various smoke concentration experimental scenarios and the smoke feature vectors of the current collection tube. The cosine similarity calculation is performed on the smoke feature vectors of various smoke concentration experimental scenarios and the smoke feature vectors of the current collection tube to obtain the current collection tube similarity of various smoke concentration experimental scenarios.

[0059] If the sampling tube sampling evaluation index of the current collection tube belongs to the sampling tube sampling evaluation index interval corresponding to a certain type of flue gas concentration experimental scene, it indicates that this type of collection tube belongs to a valid flue gas concentration experimental scene, and then the current collection tube similarity of each valid flue gas concentration experimental scene is obtained, and the valid flue gas concentration experimental scene with the maximum current collection tube similarity is selected and recorded as the preset experimental scene.

[0060] Obtain the preset basic concentration of each type of flue gas from the database. When the collection tube concentration of each type of flue gas in the current sampling tube is greater than the corresponding preset basic concentration, record this type of flue gas as the effective flue gas type of the current sampling tube, so as to obtain the various types of effective flue gas in the current sampling tube. Obtain the concentration ratio stability index corresponding to each experimental wind speed in the preset experimental scenario and the concentration variation coefficient of each type of effective flue gas in the current sampling tube from the database. Substitute the concentration ratio stability index corresponding to each experimental wind speed in the preset experimental scenario and the concentration variation coefficient of each type of effective flue gas in the current sampling tube into the wind speed usage stability index calculation formula to obtain the wind speed usage stability index of each experimental wind speed in the preset experimental scenario. Record the experimental wind speeds in the preset experimental scenario whose wind speed usage stability index is greater than the preset standard wind speed usage stability index as the effective wind speeds.

[0061] It should be noted that the wind speed stability index calculation formula is: ,in, The wind speed stability index for the experimental wind speed c of the preset experimental scenario is used. c is the number of the experimental wind speed and the value of c is a positive integer. is the concentration ratio stability index of the experimental wind speed c in the preset experimental scenario, is the x-type effective smoke variation coefficient of the experimental wind speed c in the preset experimental scenario, where x is the type number of the effective smoke, , , the value of m is the total number of effective flue gas types, and They are the preset standard concentration ratio stability index and standard flue gas variation coefficient, and are the preset concentration ratio stability index weight factor and smoke variation coefficient weight factor, , , , is the weight factor of effective flue gas of type x, , .

[0062] The concentration ratio stability index is: setting the environmental concentration of various types of flue gases in the preset experimental scenario experiment, after applying the target wind speed, the collection concentration of various types of flue gases in the preset experimental scenario experiment obtained through the collection tube is obtained, the collection concentration of various types of flue gases in the preset experimental scenario experiment obtained by the collection tube is divided by the environmental concentration of the corresponding flue gas type, and the concentration ratio of various types of flue gases at the target wind speed of the preset experimental scenario experiment is obtained, and the concentration ratio of various types of flue gases at the target wind speed of the preset experimental scenario experiment is weightedly calculated to obtain the concentration ratio stability index of the target experimental wind speed of the preset experimental scenario, thereby obtaining the concentration ratio stability index of each experimental wind speed of the preset experimental scenario.

[0063] Standard parameters and The setup process and standard parameters The setup process is the same as for is 0.91 and is 0.97, the weight factor 、 and The setting process and weight factor The setup process is the same as for 0.45, 0.55 and is 0.1.

[0064] The resampling scheme is: the wind speed at the air inlet of the sampling tube is adjusted through the flow control valve of the fan at the end of the sampling tube, the wind speed at the air inlet of the sampling tube is adjusted to each effective wind speed gear, and the flue gas data of each effective wind speed is collected at each effective wind speed gear.

[0065] The resampling analysis module is used to obtain the effective wind speeds of the sampling tube according to the resampling plan, set the effective wind speeds through the flow control valve, and thus perform resampling, collect the flue gas resampling environmental data of each collection point at each effective wind speed, analyze the resampled flue gas data of each collection point at each effective wind speed of the sampling tube, and issue an early warning.

[0066] In a specific embodiment, the flue gas resampling environmental data of each collection point for each effective wind speed is collected, and the specific collection process is as follows: the resampled flue gas data of each collection point for each effective wind speed of the sampling tube is the concentration of each type of flue gas collected each time at each collection point for each effective wind speed of the sampling tube, and the basic concentration of each type of flue gas collected each time at each collection point for each effective wind speed of the sampling tube is collected by the electrochemical sensor at each collection point of the sampling tube, and the basic concentration is multiplied by the sampling correction factor to obtain the concentration of each type of flue gas collected each time at each collection point for each effective wind speed of the sampling tube.

[0067] In a specific embodiment, the resampled flue gas data of each collection point at each effective wind speed of the sampling tube are analyzed, and the specific analysis process is as follows: the concentration of each type of flue gas collected at each collection point at each effective wind speed of the sampling tube is subjected to fluctuation index calculation, trend index calculation and deviation index calculation to obtain the flue gas fluctuation index, flue gas trend index and flue gas deviation index of each collection point at each effective wind speed of the sampling tube.

[0068] The flue gas fluctuation index, flue gas trend index and flue gas deviation index of each collection point of each effective wind speed of the sampling tube are substituted into the resampling evaluation index calculation formula to obtain the resampling evaluation index of each collection point of each effective wind speed of the sampling tube. If the basic sampling evaluation index of a collection point of a certain effective wind speed in the sampling tube is greater than or equal to the preset standard sampling evaluation index, the collection point is recorded as an available collection point, thereby obtaining the available collection points of each effective wind speed of the sampling tube, and the number of available collection points of each effective wind speed of the sampling tube is obtained by statistics. The number of available collection points of each effective wind speed of the sampling tube is divided by the total number of collection points to obtain the availability rate of each effective wind speed of the sampling tube. If the availability rate of a certain effective wind speed of the sampling tube is greater than the preset standard availability rate, the effective wind speed is recorded as the available wind speed, thereby obtaining each effective wind speed, and then obtaining the concentration of various types of flue gas at each available collection point of each available wind speed of the sampling tube.

[0069] It should be noted that the resampling evaluation index calculation formula is: ,in, is the basic sampling evaluation index of the sampling point a for the effective wind speed b of the sampling tube, b is the number of the effective wind speed, and the value of b is a positive integer. 、 and They are the smoke fluctuation index, smoke trend index and smoke deviation index of the sampling point a and the effective wind speed b of the sampling tube respectively.

[0070] The concentrations of various types of flue gases at various available collection points at various available wind speeds of the sampling tube are substituted into the flue gas analysis warning index calculation formula to obtain the flue gas analysis warning index of the sampling tube.

[0071] It should be noted that the calculation formula of the flue gas analysis warning index is: ,in, is the flue gas analysis warning index of the sampling tube, is the concentration of type t flue gas at the available collection point s with the available wind speed r of the sampling tube, r is the number of the available wind speed, , , u is the total number of available wind speed types, s is the number of available collection points, , , v is the total number of available collection points, t is the type number of the flue gas, , , w is the total number of flue gas types, is the preset standard flue gas concentration, 、 and are the weight factors of the preset available wind speed r, the weight factors of the available collection points s, and the weight factors of type t smoke, respectively. , , , , , .

[0072] Standard parameters The setup process and standard parameters The setup process is the same as for The weight factor is 0.67. 、 and The setting process and weight factor The setup process is the same as for 0.4, is 0.5 and is 0.5.

[0073] In a specific embodiment, the warning is performed, and the specific warning process is as follows: if the flue gas analysis warning index of the sampling tube is greater than the preset standard flue gas analysis warning index, a warning is issued, and the user is prompted with the preset experimental scenario of the current collection environment.

[0074] The database is used to store the sampling correction factor corresponding to each impact assessment index, the environmental fluctuation assessment index range corresponding to each flue gas collector usage plan, the sampling assessment index range of the sampling tube for various flue gas concentration experimental scenarios, various flue gas concentrations for various flue gas concentration experimental scenarios, the preset basic concentrations in various flue gases, the concentration ratio stability index corresponding to each experimental wind speed in the preset experimental scenario, the concentration variation coefficient of each effective flue gas in the current sampling tube corresponding to each experimental wind speed in the preset experimental scenario, the usage index correction factor corresponding to the current filter usage times, the filter basic usage index corresponding to each pressure difference, and the trend index corresponding to the slope of each basic displacement concentration change curve.

[0075] according to Figure 2 As shown, the present invention provides a portable flue gas analysis method, comprising the following steps: Step 1, sampling tube analysis: collecting the basic instrument interference data of the sampling tube, analyzing the basic instrument interference data of the sampling tube, obtaining the sampling tube impact evaluation index, and then setting the sampling tube usage plan.

[0076] Step 2: Basic sampling analysis: According to the sampling tube usage plan, basic environmental information is collected. According to the basic environmental information, the flue gas collector usage plan is set. Then, according to the flue gas collector usage plan, each collection point of the sampling tube is set to perform basic sampling, and basic sampling flue gas data of each collection point of the sampling tube is collected. The basic sampling flue gas data of each collection point of the sampling tube is analyzed to obtain the environmental basic flue gas data and the basic sampling evaluation index. According to the environmental basic flue gas data, a resampling plan is set.

[0077] Step 3: Resampling analysis: According to the resampling scheme, the effective wind speeds of the sampling tube are obtained, and the effective wind speeds are set through the flow control valve to perform resampling. The flue gas resampling environmental data of each collection point at each effective wind speed is collected, and the resampled flue gas data of each collection point at each effective wind speed of the sampling tube is analyzed to issue an early warning.

[0078] The above content is merely an example and explanation of the concept of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined in this specification, they should all fall within the scope of protection of the present invention.

Claims

1. A portable flue gas analysis device, characterized in that: Includes the following modules: The sampling tube analysis module is used to collect and analyze the interference data of the basic instruments of the sampling tubes, obtain the sampling tube impact assessment index, and then set the sampling tube usage plan; The basic sampling and analysis module is used to collect basic environmental information according to the sampling tube usage plan, set the flue gas collector usage plan based on the basic environmental information, and then set the sampling points of the sampling tube according to the flue gas collector usage plan to perform basic sampling, collect basic sampling flue gas data from each sampling point of the sampling tube, analyze the basic sampling flue gas data from each sampling point of the sampling tube to obtain environmental basic flue gas data, and set a resampling plan based on the environmental basic flue gas data; The resampling analysis module is used to obtain the effective wind speeds of the sampling tube according to the resampling scheme, set the effective wind speeds through the flow control valve, and thus perform resampling. The module collects the flue gas resampling environmental data of each sampling point at each effective wind speed, analyzes the resampled flue gas data of each sampling point at each effective wind speed of the sampling tube, and issues an early warning. The resampling scheme is specifically set up in the following process: averaging the concentrations of various types of flue gases collected at each valid collection point to obtain the collection point concentrations of various types of flue gases at each valid collection point; averaging the collection point concentrations of various types of flue gases at each valid collection point to obtain the collection tube concentrations of various types of flue gases; averaging the basic sampling evaluation indexes of each collection point of the sampling tube to obtain the sampling tube sampling evaluation index of the current sampling tube; Obtain sampling evaluation index intervals and various smoke concentrations of the sampling tube for various smoke concentration experimental scenarios from the database, perform vector conversion on the various smoke concentrations of the various smoke concentration experimental scenarios and the smoke collection tube concentrations of the various smoke concentration experimental scenarios, obtain the smoke feature vectors of the various smoke concentration experimental scenarios and the smoke feature vectors of the current collection tube, perform cosine similarity calculation on the smoke feature vectors of the various smoke concentration experimental scenarios and the smoke feature vectors of the current collection tube, and obtain the similarity of the current collection tube for various smoke concentration experimental scenarios; If the sampling tube sampling evaluation index of the current collection tube belongs to the sampling tube sampling evaluation index interval corresponding to a certain type of smoke concentration experimental scene, it indicates that this type of smoke concentration experimental scene belongs to a valid smoke concentration experimental scene, and then the current collection tube similarity of each valid smoke concentration experimental scene is obtained. The valid smoke concentration experimental scene with the maximum current collection tube similarity is selected and recorded as the preset experimental scene; Obtain the preset basic concentration of each type of flue gas from the database. When the collection tube concentration of each type of flue gas in the current sampling tube is greater than the corresponding preset basic concentration, record this type of flue gas as the effective flue gas type of the current sampling tube, thereby obtaining the various types of effective flue gas in the current sampling tube. Obtain the concentration ratio stability index corresponding to each experimental wind speed of the preset experimental scenario and the concentration variation coefficient of each type of effective flue gas in the current sampling tube from the database. Substitute the concentration ratio stability index corresponding to each experimental wind speed of the preset experimental scenario and the concentration variation coefficient of each type of effective flue gas in the current sampling tube into the wind speed usage stability index calculation formula to obtain the wind speed usage stability index of each experimental wind speed in the preset experimental scenario. Record the experimental wind speeds of the preset experimental scenario whose wind speed usage stability index is greater than the preset standard wind speed usage stability index as the effective wind speeds. The resampling scheme is as follows: the wind speed at the air inlet of the sampling tube is adjusted by the flow control valve of the fan at the end of the sampling tube, and the wind speed at the air inlet of the sampling tube is adjusted to each effective wind speed gear, and the smoke data of each effective wind speed is collected respectively at each effective wind speed gear; The resampled flue gas data of each collection point at each effective wind speed of the sampling tube are analyzed, and the specific analysis process is as follows: the resampled flue gas data of each collection point at each effective wind speed of the sampling tube are the concentrations of various types of flue gas collected at each collection point at each effective wind speed of the sampling tube. According to the analysis process of the basic sampled flue gas data of each collection point, the resampled flue gas data of each collection point at each effective wind speed of the sampling tube are analyzed to obtain the resampling evaluation index of each collection point at each effective wind speed of the sampling tube. Then, according to the judgment method of each effective collection point, each available collection point at each available wind speed of the sampling tube is judged to obtain the concentration of various types of flue gas at each available collection point at each available wind speed of the sampling tube; Substituting the concentration of each type of flue gas at each available collection point at each available wind speed of the sampling tube into the flue gas analysis warning index calculation formula, the flue gas analysis warning index of the sampling tube is obtained; The specific warning process is as follows: if the flue gas analysis warning index of the sampling tube is greater than the preset standard flue gas analysis warning index, a warning is issued, and the user is prompted with the preset experimental scenario of the current collection environment.

2. A portable flue gas analysis device according to claim 1, characterized in that: The interference data of the sampling tube basic instrument is analyzed, and the specific analysis process is as follows: The basic instrument interference data of the sampling tube include the adsorption evaluation index, filter usage index and surface foreign matter index of the sampling tube. The adsorption evaluation index, filter usage index and surface foreign matter index of the sampling tube are substituted into the calculation formula of the sampling tube impact assessment index to obtain the sampling tube impact assessment index.

3. A portable flue gas analysis device according to claim 2, characterized in that: The specific setting process of setting the sampling tube usage plan is as follows: If the sampling tube impact assessment index is greater than the preset standard sampling tube impact assessment index, the sampling tube is replaced to obtain a new sampling tube, and then the basic instrument interference data of the new sampling tube is recollected, and the new sampling tube impact assessment index is obtained by analysis, and recorded as the impact assessment index of sampling tube sampling; if the sampling tube impact assessment index is less than or equal to the preset standard sampling tube impact assessment index, the sampling tube impact assessment index is recorded as the impact assessment index of sampling tube sampling, and the sampling correction factors corresponding to each impact assessment index are obtained from the database, thereby obtaining the sampling correction factors of sampling tube sampling; The sampling tube usage plan is: if the sampling tube impact assessment index is greater than the preset standard sampling tube impact assessment index, the sampling tube is replaced; if the sampling tube impact assessment index is less than or equal to the preset standard sampling tube impact assessment index, the sampling tube is used directly, and the subsequent sampling data is corrected according to the sampling correction factor of the sampling tube sampling.

4. A portable flue gas analysis device according to claim 3, characterized in that: The specific analysis process of setting up the smoke collector usage plan is as follows: The basic environmental information includes the temperature fluctuation index, humidity fluctuation index, airflow velocity fluctuation index, and airflow characteristic correction index of the sampling environment. The temperature fluctuation index, humidity fluctuation index, airflow velocity fluctuation index, and airflow characteristic correction index of the sampling environment are substituted into the environmental fluctuation assessment index calculation formula to obtain the environmental fluctuation assessment index of the sampling environment. The environmental fluctuation assessment index interval corresponding to each flue gas collector usage plan is obtained from the database. If the environmental fluctuation assessment index of the sampling environment belongs to the environmental fluctuation assessment index interval corresponding to a certain flue gas collector usage plan, it indicates that the current sampling environment is suitable for the flue gas collector usage plan. The usage plan of the flue gas collector is: set the first collection point with the preset distance length as the distance from the first collection point to the entrance of the collection tube, set each collection point with the preset interval length as the distance between each collection point, set the position of each collection point in the sampling tube, and set the probe of each collector at the position of each collection point.

5. A portable smoke analysis device according to claim 4, characterized in that: The basic sampling flue gas data of each sampling point of the sampling tube is analyzed, and the specific analysis process is as follows: The basic sampling flue gas data of each sampling point of the sampling tube is the concentration of each type of flue gas collected at each sampling point of the sampling tube. The concentration of each type of flue gas collected at each sampling point of the sampling tube is subjected to fluctuation index calculation, trend index calculation and deviation index calculation to obtain the flue gas fluctuation index, flue gas trend index and flue gas deviation index of each sampling point of the sampling tube; The flue gas fluctuation index, flue gas trend index and flue gas deviation index of each sampling point in the sampling tube are substituted into the basic sampling evaluation index calculation formula to obtain the basic sampling evaluation index of each sampling point in the sampling tube. If the basic sampling evaluation index of a certain sampling point in the sampling tube is greater than or equal to the preset standard sampling evaluation index, the sampling point is recorded as a valid sampling point, thereby obtaining the concentration of each type of flue gas collected at each valid collection point.

6. The portable flue gas analysis device according to claim 1, characterized in that: It also includes a database for storing the sampling correction factor corresponding to each impact assessment index, the environmental fluctuation assessment index range corresponding to each flue gas collector usage plan, the sampling assessment index range of the sampling tube for various flue gas concentration experimental scenarios, various flue gas concentrations for various flue gas concentration experimental scenarios, the preset basic concentrations in various types of flue gas, the concentration ratio stability index corresponding to each experimental wind speed in the preset experimental scenario, and the concentration variation coefficient of various types of effective flue gas in the current sampling tube corresponding to each experimental wind speed in the preset experimental scenario.

7. A flue gas analysis method using the portable flue gas analysis device according to any one of claims 1 to 6, characterized in that: The steps include: Step 1: Sampling tube analysis: Collect and analyze the interference data of basic instruments on the sampling tubes to obtain the sampling tube impact assessment index, and then set the sampling tube usage plan; Step 2: Basic sampling analysis: According to the sampling tube usage plan, basic environmental information is collected. According to the basic environmental information, a smoke collector usage plan is set. Then, according to the smoke collector usage plan, each sampling point of the sampling tube is set to perform basic sampling, and basic sampling smoke data of each sampling point of the sampling tube is collected. The basic sampling smoke data of each sampling point of the sampling tube is analyzed to obtain environmental basic smoke data and basic sampling evaluation index. According to the environmental basic smoke data, a resampling plan is set; Step 3: Resampling analysis: According to the resampling scheme, the effective wind speeds of the sampling tube are obtained, and the effective wind speeds are set through the flow control valve to perform resampling. The flue gas resampling environmental data of each collection point at each effective wind speed is collected, and the resampled flue gas data of each collection point at each effective wind speed of the sampling tube is analyzed to issue an early warning.

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