A method and device for measuring flue gas pollutants

Abstract

The present application provides a method and device for measuring flue gas pollutants, and relates to the technical field of pollutant measurement. When executing the method, the hole positions of multiple measuring holes are first obtained, and then multiple measuring points are arranged in the depth direction of the multiple measuring holes, and then the average fluxes corresponding to the multiple measuring holes and the fluxes corresponding to the multiple measuring points in the depth direction of the multiple measuring holes are determined. Finally, according to the average fluxes corresponding to the multiple measuring holes and the fluxes corresponding to the multiple measuring points in the depth direction of the multiple measuring holes, the equivalent measuring points corresponding to the multiple measuring holes are determined, so as to measure the flue gas pollutants using the equivalent measuring points corresponding to the multiple measuring holes. In this way, the equivalent measuring points are determined by the average fluxes corresponding to the multiple measuring holes and the fluxes corresponding to the multiple measuring points in the depth direction of the multiple measuring holes, and the flue gas pollutants are measured using the equivalent measuring points, so as to improve the accuracy of measuring the flue gas pollutants.

Description

Technical Field

[0001] The present application relates to the technical field of pollutant measurement, and in particular to a method and device for measuring flue gas pollutants. Background Art

[0002] Coal-fired power generation provides clean power to society, but also produces a large amount of air pollutants. After the implementation of ultra-low flue gas emissions by coal-fired units, the emissions of SO2, NOx, and smoke have been significantly improved. The substantial reduction in conventional pollutants has led to continuous improvement in air quality, but heavy pollution weather still occurs from time to time, and the problem of air pollution continues to receive high attention. In addition to conventional pollutants such as SO2, NOx, and smoke, pollutants in coal-fired flue gas also include unconventional pollutants such as PM2.5, SO3, NH3, mercury and its compounds, and VOCS.

[0003] At present, flue gas pollutant detection is divided into online monitoring and offline monitoring. Online monitoring generally uses single-point measurement, and multi-point measurement generally selects 3 measurement points for mixed measurement to improve measurement accuracy. Offline monitoring is mainly manual detection, using single-point and multi-point measurement. Single-point is mainly measured by representative point method, and multi-point measurement generally uses grid method, and grid points are measured one by one. For a flue cross-section of dozens of square meters, whether it is online monitoring or offline monitoring, single-point measurement or multi-point measurement, there is a certain deviation in the measurement of pollutant concentration.

[0004] In summary, how to improve the accuracy of flue gas pollutant measurement is an urgent problem that technical personnel in this field need to solve. Summary of the invention

[0005] In view of this, the present application provides a flue gas pollutant measurement method and device, aiming to improve the accuracy of flue gas pollutant measurement.

[0006] In a first aspect, the present application provides a method for measuring flue gas pollutants, comprising:

[0007] Obtaining measuring hole positions of multiple measuring holes;

[0008] Arranging a plurality of measuring points in depth directions of the plurality of measuring holes according to the measuring hole positions of the plurality of measuring holes;

[0009] Determine the average fluxes corresponding to the plurality of measuring holes respectively;

[0010] Determine the fluxes respectively corresponding to the plurality of measuring points of the plurality of measuring holes in the depth direction;

[0011] Determine equivalent measuring points corresponding to the plurality of measuring holes respectively according to average fluxes corresponding to the plurality of measuring holes respectively and fluxes corresponding to a plurality of measuring points of the plurality of measuring holes respectively in a depth direction;

[0012] The flue gas pollutants are measured using equivalent measuring points corresponding to the multiple measuring holes.

[0013] Optionally, determining the average fluxes corresponding to the plurality of measuring holes respectively includes:

[0014] Measuring the flue gas flow field and concentration field on the flue cross section based on the measuring hole positions of the multiple measuring holes to obtain the flow field distribution and concentration field distribution at different points on the flue cross section; the flue cross section includes the multiple measuring holes;

[0015] According to the flow field distribution and concentration field distribution at different points on the flue cross section, the mean flow velocity and the mean concentration of the multiple measuring holes in the depth direction are calculated;

[0016] The average flow rate of each of the plurality of measuring holes in the depth direction is multiplied by the average concentration of each of the plurality of measuring holes in the depth direction to obtain the average flux corresponding to each of the plurality of measuring holes.

[0017] Optionally, determining the fluxes respectively corresponding to the plurality of measuring points of the plurality of measuring holes in the depth direction includes:

[0018] Based on the measurement hole positions of the multiple measurement holes, the flue gas flow field and concentration field on the flue cross section are measured to obtain the flow field distribution and concentration field distribution at different points on the flue cross section; the different points on the flue cross section include multiple measurement points of the multiple measurement holes in the depth direction;

[0019] According to the flow field distribution and concentration field distribution at different points on the flue cross section, the fluxes corresponding to the multiple measuring points of the multiple measuring holes in the depth direction are calculated.

[0020] Optionally, determining the equivalent measuring points respectively corresponding to the plurality of measuring holes according to the average fluxes respectively corresponding to the plurality of measuring holes and the fluxes respectively corresponding to the plurality of measuring points of the plurality of measuring holes in the depth direction includes:

[0021] Among the multiple measuring points of each measuring hole in the depth direction, the measuring point whose flux is closest to the average flux corresponding to the measuring hole is determined as the equivalent measuring point corresponding to the measuring hole.

[0022] Optionally, the measuring of flue gas pollutants using equivalent measuring points corresponding to the multiple measuring holes respectively includes:

[0023] The flue gas pollutants are measured in sequence using the equivalent measuring points corresponding to the multiple measuring holes respectively, so as to obtain the average concentration and concentration distribution of the flue gas pollutants on the flue cross section.

[0024] Optionally, the method of sequentially measuring the flue gas pollutants using the equivalent measuring points corresponding to the multiple measuring holes to obtain the average concentration and concentration distribution of the flue gas pollutants on the flue cross section includes:

[0025] Determine the target sampling volume according to the preset time;

[0026] After sampling the flue gas pollutants at the first equivalent measuring point for the preset time, sampling the flue gas pollutants at the target sampling amount in sequence at each of the remaining equivalent measuring points;

[0027] The collected flue gas pollutants are used to determine the average concentration and concentration distribution of the flue gas pollutants on the flue cross section.

[0028] In a second aspect, the present application provides a flue gas pollutant measuring device, comprising:

[0029] An acquisition module, used for acquiring the measuring hole positions of multiple measuring holes;

[0030] An arrangement module, configured to arrange a plurality of measuring points in a depth direction of the plurality of measuring holes according to the measuring hole positions of the plurality of measuring holes;

[0031] A first determination module is used to determine the average fluxes corresponding to the plurality of measuring holes respectively;

[0032] A second determination module is used to determine the fluxes corresponding to the multiple measuring points of the multiple measuring holes in the depth direction respectively;

[0033] A third determination module is used to determine equivalent measuring points corresponding to the plurality of measuring holes respectively according to average fluxes corresponding to the plurality of measuring holes respectively and fluxes corresponding to the plurality of measuring points of the plurality of measuring holes respectively in the depth direction;

[0034] The measuring module is used to measure the flue gas pollutants by using the equivalent measuring points corresponding to the multiple measuring holes.

[0035] Optionally, the first determining module includes:

[0036] A first measuring unit is used to measure the flue gas flow field and concentration field on the flue cross section based on the measuring hole positions of the multiple measuring holes to obtain the flow field distribution and concentration field distribution at different points on the flue cross section; the flue cross section includes the multiple measuring holes;

[0037] A first calculation unit is used to calculate the mean flow velocity and the mean concentration of the plurality of measuring holes in the depth direction according to the flow field distribution and the concentration field distribution at different points on the flue cross section;

[0038] The second calculation unit is used to multiply the average flow rate of the multiple measuring holes in the depth direction with the average concentration of the multiple measuring holes in the depth direction to obtain the average flux corresponding to the multiple measuring holes.

[0039] Optionally, the second determining module includes:

[0040] A second measuring unit is used to measure the flue gas flow field and concentration field on the flue cross section based on the measuring hole positions of the multiple measuring holes, and obtain the flow field distribution and concentration field distribution at different points on the flue cross section; the different points on the flue cross section include multiple measuring points of the multiple measuring holes in the depth direction;

[0041] The third calculation unit is used to calculate the fluxes corresponding to the multiple measuring points of the multiple measuring holes in the depth direction according to the flow field distribution and the concentration field distribution at different points on the flue cross section.

[0042] Optionally, the third determining module includes:

[0043] The first determining unit is used to determine, among a plurality of measuring points in the depth direction of each measuring hole, a measuring point whose flux is closest to an average flux corresponding to the measuring hole as an equivalent measuring point corresponding to the measuring hole.

[0044] Optionally, the measurement module includes:

[0045] The third measuring unit is used to measure the flue gas pollutants in turn using the equivalent measuring points corresponding to the multiple measuring holes respectively, so as to obtain the average concentration and concentration distribution of the flue gas pollutants on the flue cross section.

[0046] Optionally, the third measuring unit includes:

[0047] A first determination subunit, used to determine a target sampling amount according to a preset time;

[0048] A sampling subunit, configured to sample the flue gas pollutants for the preset time using the first equivalent measuring point, and then sample the flue gas pollutants for the target sampling amount using each of the remaining equivalent measuring points in sequence;

[0049] The second determination subunit is used to determine the average concentration and concentration distribution of the flue gas pollutants on the flue cross section by using the collected flue gas pollutants.

[0050] The present application provides a method for measuring flue gas pollutants. When executing the method, the hole positions of multiple measuring holes are first obtained, and then multiple measuring points are arranged in the depth direction of the multiple measuring holes, and then the average fluxes corresponding to the multiple measuring holes and the fluxes corresponding to the multiple measuring points in the depth direction of the multiple measuring holes are determined. Finally, according to the average fluxes corresponding to the multiple measuring holes and the fluxes corresponding to the multiple measuring points in the depth direction of the multiple measuring holes, the equivalent measuring points corresponding to the multiple measuring holes are determined, so as to measure the flue gas pollutants using the equivalent measuring points corresponding to the multiple measuring holes. In this way, the equivalent measuring points are determined by the average fluxes corresponding to the multiple measuring holes and the fluxes corresponding to the multiple measuring points in the depth direction of the multiple measuring holes, and the flue gas pollutants are measured using the equivalent measuring points, so as to improve the accuracy of the measurement of the flue gas pollutants. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in this embodiment or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 A flow chart of a flue gas pollutant measurement method provided in an embodiment of the present application;

[0053] Figure 2 A schematic diagram of a plurality of measuring holes and a plurality of measuring points of the plurality of measuring holes in a depth direction provided in an embodiment of the present application;

[0054] Figure 3 A schematic diagram of determining equivalent measuring points provided in an embodiment of the present application;

[0055] Figure 4 A schematic diagram of a flue gas pollutant measurement scenario provided in an embodiment of the present application;

[0056] Figure 5 A schematic diagram of the structure of a flue gas pollutant measuring device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0057] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. The present application provides a method and device for measuring flue gas pollutants, which are used in the field of pollutant measurement technology. The above is only an example and does not limit the application field of the method and device provided by the present application.

[0058] Coal-fired power generation provides clean power to society, but also produces a large amount of air pollutants. After the implementation of ultra-low flue gas emissions by coal-fired units, the emissions of SO2, NOx, and smoke have been significantly improved. The substantial reduction in conventional pollutants has led to continuous improvement in air quality, but heavy pollution weather still occurs from time to time, and the problem of air pollution continues to receive high attention. In addition to conventional pollutants such as SO2, NOx, and smoke, pollutants in coal-fired flue gas also include unconventional pollutants such as PM2.5, SO3, NH3, mercury and its compounds, and VOCS.

[0059] At present, flue gas pollutant detection is divided into online monitoring and offline monitoring. Online monitoring generally uses single-point measurement, and multi-point measurement generally selects 3 measurement points for mixed measurement to improve measurement accuracy. Offline monitoring is mainly manual detection, using single-point and multi-point measurement. Single-point is mainly measured by representative point method, and multi-point measurement generally uses grid method, and grid points are measured one by one. For a flue cross-section of dozens of square meters, whether it is online monitoring or offline monitoring, single-point measurement or multi-point measurement, there is a certain deviation in the measurement of pollutant concentration.

[0060] After research, the inventor proposed the technical solution of the present application, firstly obtaining the hole positions of multiple hole measurements, then arranging multiple measuring points in the depth direction of the multiple hole measurements, then determining the average fluxes corresponding to the multiple hole measurements and the fluxes corresponding to the multiple measuring points in the depth direction of the multiple hole measurements, and finally determining the equivalent measuring points corresponding to the multiple hole measurements according to the average fluxes corresponding to the multiple hole measurements and the fluxes corresponding to the multiple measuring points in the depth direction of the multiple hole measurements, so as to measure the flue gas pollutants using the equivalent measuring points corresponding to the multiple hole measurements. In this way, by determining the equivalent measuring points using the average fluxes corresponding to the multiple hole measurements and the fluxes corresponding to the multiple measuring points in the depth direction of the multiple hole measurements, and measuring the flue gas pollutants using the equivalent measuring points, the accuracy of measuring the flue gas pollutants can be improved.

[0061] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. It should be noted that, for ease of description, only the parts related to the relevant invention are shown in the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0062] See also Figure 1 , Figure 1 A flow chart of a flue gas pollutant measurement method provided in an embodiment of the present application includes:

[0063] S101: Acquire hole measurement positions of multiple hole measurement.

[0064] The measuring hole positions of multiple measuring holes are obtained on the flue cross section.

[0065] S102: Arrange a plurality of measuring points in depth directions of the plurality of measuring holes according to the measuring hole positions of the plurality of measuring holes.

[0066] A plurality of measuring points are arranged in the depth direction of a plurality of measuring holes, wherein the measuring holes are numbered N, N is a positive integer, and i is the number of the measuring hole N in the depth direction, i is a positive integer. Figure 2 As shown, Figure 2 A schematic diagram of multiple measuring holes and multiple measuring points in the depth direction of the multiple measuring holes provided in an embodiment of the present application, for example, measuring hole A is numbered 1, measuring point a1 is the measuring point of measuring hole A in the depth direction, numbered 1; measuring hole D is numbered 4, measuring point d3 is the measuring point of measuring hole D in the depth direction, numbered 3.

[0067] S103: Determine the average flux corresponding to the multiple measuring holes.

[0068] Based on the measurement hole positions of multiple measurement holes, the flue gas flow field and concentration field on the flue cross section are measured to obtain the flow field distribution and concentration field distribution at different points on the flue cross section. According to the flow field distribution and concentration field distribution at different points on the flue cross section, the mean flow velocity and the mean concentration of the multiple measurement holes in the depth direction are calculated; the mean flow velocity of the multiple measurement holes in the depth direction is multiplied by the mean concentration of the multiple measurement holes in the depth direction to obtain the average flux corresponding to the multiple measurement holes. That is, after obtaining the flow field distribution and concentration field distribution at different points on the flue cross section, according to the flow field distribution and concentration field distribution at different points on the flue cross section, the pollutant concentration value and the flue gas flow velocity of each measurement point can be determined, and then the mean concentration and the mean flow velocity of each measurement hole in the depth direction can be determined. By multiplying the mean concentration and the mean flow velocity of each measurement hole in the depth direction, the average flux corresponding to each measurement hole can be obtained:

[0069] ;

[0070] in, is the average flux corresponding to the measuring hole numbered N, is the mean concentration of the measuring hole numbered N in the depth direction, is the mean flow velocity in the depth direction of the measuring hole numbered N.

[0071] S104: Determine the fluxes corresponding to the multiple measuring points of the multiple measuring holes in the depth direction.

[0072] The flow field distribution and concentration field distribution at different points on the flue cross section are obtained. According to the flow field distribution and concentration field distribution at different points on the flue cross section, the pollutant concentration value and the flue gas flow rate corresponding to each measuring point are obtained. By multiplying the pollutant concentration value and the flue gas flow rate, the flux corresponding to each measuring point can be obtained.

[0073] ;

[0074] in, is the flux corresponding to the measuring point numbered i in the depth direction of the measuring hole numbered N; is the pollutant concentration corresponding to the measuring point numbered i in the depth direction of the measuring hole numbered N; is the flue gas velocity corresponding to the measuring point numbered i in the depth direction of the measuring hole numbered N. Figure 2 Take the schematic diagram shown as an example, is the flux corresponding to the measuring point numbered 3 in the depth direction of the measuring hole numbered 2, that is, the flux corresponding to the measuring point b3; is the pollutant concentration corresponding to the measuring point numbered 1 in the depth direction of the measuring hole numbered 3, that is, the pollutant concentration corresponding to the measuring point c1; It is the flue gas flow velocity corresponding to the measuring point numbered 5 in the depth direction of the measuring hole numbered 7, that is, the flue gas flow velocity corresponding to the measuring point g5.

[0075] S105: Determine equivalent measuring points corresponding to the plurality of measuring holes respectively according to average fluxes corresponding to the plurality of measuring holes respectively and fluxes corresponding to the plurality of measuring points in the depth direction of the plurality of measuring holes respectively.

[0076] After implementing step S103 and step S104, the average flux corresponding to each measuring hole and the flux corresponding to each measuring point of each measuring hole in the depth direction can be obtained. The relative deviation between the average flux corresponding to each measuring hole and the flux corresponding to each measuring point of each measuring hole in the depth direction is calculated:

[0077] ;

[0078] in, is the relative deviation between the average flux corresponding to the measuring hole numbered N and the flux corresponding to the measuring point numbered i in the depth direction of the measuring hole numbered N. The smallest measuring point is determined as the equivalent measuring point of the measuring hole where the measuring point is located.

[0079] like Figure 3 As shown, Figure 3A schematic diagram for determining equivalent measuring points provided in an embodiment of the present application, where the absolute deviation between the flux corresponding to measuring point a3 and the average flux corresponding to measuring hole A is the smallest, then measuring point a3 is determined as the equivalent measuring point. Similarly, measuring point b3, measuring point c3, measuring point d3, measuring point e3, measuring point f3, measuring point g3 and measuring point h3 are all measuring points with the smallest absolute deviation between the flux and the average flux corresponding to the measuring hole, that is, measuring point b3, measuring point c3, measuring point d3, measuring point e3, measuring point f3, measuring point g3 and measuring point h3 are determined as equivalent measuring points.

[0080] S106: Measure the flue gas pollutants using equivalent measuring points corresponding to the multiple measuring holes.

[0081] In one round of measurement, the equivalent measuring points determined in step S105 are used to measure the flue gas pollutants in turn. After one round of sampling, the flue gas concentration values ​​corresponding to each measuring hole can be obtained, and then the arithmetic mean of the flue gas concentration values ​​corresponding to each measuring hole is taken to obtain the average concentration of the flue cross section. Then, the pollutant concentration distribution of the flue cross section can be obtained:

[0082] ;

[0083] in, is the pollutant concentration distribution in the flue cross section, which is expressed by relative standard deviation; is the average concentration in the flue cross section; It is the real-time flux of the equivalent measuring point of the measuring hole numbered N.

[0084] In the specific implementation process, the flue gas sampling volume is mainly related to the sampling time t, sampling volume V, flue gas temperature T, flue gas humidity d and flue gas pressure p, and the functional relationship is:

[0085] ;

[0086] After the sampling time of the starting hole reaches the set value t0, the sampling volume m0 is obtained based on the function relationship, and then the next hole sampling is carried out, and so on, until the end of this round of sampling. The sampling time is not set for the holes after the starting hole, and the sampling volume of the subsequent holes needs to reach m0 respectively until the end of this round of sampling.

[0087] In this embodiment, the measurement hole positions of the multiple measurement holes are first obtained, and then multiple measurement points are arranged in the depth direction of the multiple measurement holes, and then the average fluxes corresponding to the multiple measurement holes and the fluxes corresponding to the multiple measurement points in the depth direction of the multiple measurement holes are determined. Finally, according to the average fluxes corresponding to the multiple measurement holes and the fluxes corresponding to the multiple measurement points in the depth direction of the multiple measurement holes, the equivalent measurement points corresponding to the multiple measurement holes are determined, so as to measure the flue gas pollutants using the equivalent measurement points corresponding to the multiple measurement holes. In this way, by determining the equivalent measurement points based on the average fluxes corresponding to the multiple measurement holes and the fluxes corresponding to the multiple measurement points in the depth direction of the multiple measurement holes, and measuring the flue gas pollutants using the equivalent measurement points, the accuracy of measuring the flue gas pollutants can be improved.

[0088] The above introduces the flue gas pollutant measurement method provided in the embodiment of the present application. The following is an exemplary description of the implementation method of step S106 in the flue gas pollutant measurement method in combination with a specific application scenario.

[0089] See also Figure 4 , Figure 4 A schematic diagram of a flue gas pollutant measurement scenario provided in an embodiment of the present application. After determining the equivalent flux of each measuring hole in the depth direction, the suction end 411 of the sampling gun 410 is arranged at the equivalent measuring point. In this way, the sampling gun 410 is arranged on each measuring hole to form an equivalent flux representative point grid. The tail of each sampling gun 410 is connected to the switching box 440 by a heating pipe 420. The heating of the heating pipe 420 is controlled by a temperature controller 430 to ensure that the smoke temperature in the pipeline is above 150°C. If there are special requirements, the temperature control range can be adjusted so that the heating temperature meets the flue gas pollutant sampling requirements.

[0090] The switching box 440 and the flue gas analyzer 460 are designed with insulation to prevent flue gas condensation and affect the measurement results. The switching box 440 determines the air inlet interface 441 according to the number of measuring holes. Each air inlet interface 441 corresponds to a measuring hole, and an air outlet 443 is set. Each air inlet interface 441 is connected to the air outlet 443 through a valve 442. When an air inlet interface 441 is connected to the air outlet 443, the valves 442 corresponding to the other air inlet interfaces 441 are closed. At this time, the measured pollutant concentration is the pollutant concentration of the corresponding measuring hole. The measuring holes are from 1 to N, and each measuring hole is sampled in turn. After a round of sampling, the collected flue gas is analyzed by the flue gas analyzer 460 to obtain the flue gas concentration value corresponding to each measuring hole, and then the arithmetic mean of the concentration values ​​corresponding to each measuring hole is taken, which is the average concentration of the flue cross section, and the average pollutant concentration and concentration distribution are obtained. The specific calculation method is as shown in the previous text and will not be repeated here.

[0091] The interface switching of the switching box 440 is mainly controlled by the built-in control module 444. The flue gas sampling volume is mainly related to the sampling time t, the sampling volume V, the flue gas temperature T, the flue gas humidity d, the flue gas pressure p, etc., and the functional relationship is: After the sampling time of the starting hole reaches the set value t0, the sampling amount m0 ​​is obtained based on the functional relationship, and then the next hole sampling is carried out, and this process is repeated until the end of this round of sampling.

[0092] The sampling time is not set for the holes after the initial hole. When the sampling volume of the subsequent holes reaches m0, the switch box 440 switches the interface through the control module 444 until the end of this round of sampling. In this cycle, the sampling time and sampling volume of each hole are variable. Under the condition of equivalent flux, the sample similarity of each hole is greatly improved, and the detection deviation between each sample is reduced before the sample enters the flue gas analyzer 460, reducing the system error. The flue gas pretreatment device 450 can be used to pre-treat the flue gas to improve the accuracy of the analysis. The time control function relationship of the above-mentioned sequential round measurement is:

[0093] ;

[0094] Where t i is the sampling time of each hole after the initial hole. When the sampling of holes 1 to N is completed, the time required to complete a round of sampling is T N .

[0095] The above are some specific implementations of the flue gas pollutant measurement method provided in the embodiment of the present application. Based on this, the present application also provides a corresponding device. The device provided in the embodiment of the present application will be introduced from the perspective of functional modularization.

[0096] See also Figure 5 , Figure 5 A flue gas pollutant measuring device provided in an embodiment of the present application, the flue gas pollutant measuring device 500, comprises:

[0097] An acquisition module 510 is used to acquire the measurement hole positions of multiple measurement holes;

[0098] An arrangement module 520, configured to arrange a plurality of measuring points in a depth direction of the plurality of measuring holes according to the measuring hole positions of the plurality of measuring holes;

[0099] A first determination module 530 is used to determine the average fluxes corresponding to the plurality of measuring holes respectively;

[0100] A second determination module 540 is used to determine the fluxes corresponding to the multiple measuring points of the multiple measuring holes in the depth direction respectively;

[0101] A third determination module 550 is used to determine equivalent measurement points corresponding to the plurality of measurement holes respectively according to the average fluxes corresponding to the plurality of measurement holes respectively and the fluxes corresponding to the plurality of measurement points of the plurality of measurement holes respectively in the depth direction;

[0102] The measuring module 560 is used to measure the flue gas pollutants using the equivalent measuring points corresponding to the multiple measuring holes.

[0103] Optionally, the first determining module 530 includes:

[0104] A first measuring unit is used to measure the flue gas flow field and concentration field on the flue cross section based on the measuring hole positions of the multiple measuring holes to obtain the flow field distribution and concentration field distribution at different points on the flue cross section; the flue cross section includes the multiple measuring holes;

[0105] A first calculation unit is used to calculate the mean flow velocity and the mean concentration of the plurality of measuring holes in the depth direction according to the flow field distribution and the concentration field distribution at different points on the flue cross section;

[0106] The second calculation unit is used to multiply the average flow rate of the multiple measuring holes in the depth direction with the average concentration of the multiple measuring holes in the depth direction to obtain the average flux corresponding to the multiple measuring holes.

[0107] Optionally, the second determining module 540 includes:

[0108] A second measuring unit is used to measure the flue gas flow field and concentration field on the flue cross section based on the measuring hole positions of the multiple measuring holes, and obtain the flow field distribution and concentration field distribution at different points on the flue cross section; the different points on the flue cross section include multiple measuring points of the multiple measuring holes in the depth direction;

[0109] The third calculation unit is used to calculate the fluxes corresponding to the multiple measuring points of the multiple measuring holes in the depth direction according to the flow field distribution and the concentration field distribution at different points on the flue cross section.

[0110] Optionally, the third determining module 550 includes:

[0111] The first determining unit is used to determine, among a plurality of measuring points in the depth direction of each measuring hole, a measuring point whose flux is closest to an average flux corresponding to the measuring hole as an equivalent measuring point corresponding to the measuring hole.

[0112] Optionally, the measuring module 560 includes:

[0113] The third measuring unit is used to measure the flue gas pollutants in turn using the equivalent measuring points corresponding to the multiple measuring holes respectively, so as to obtain the average concentration and concentration distribution of the flue gas pollutants on the flue cross section.

[0114] Optionally, the third measuring unit includes:

[0115] A first determination subunit, used to determine a target sampling amount according to a preset time;

[0116] A sampling subunit, configured to sample the flue gas pollutants for the preset time using the first equivalent measuring point, and then sample the flue gas pollutants for the target sampling amount using each of the remaining equivalent measuring points in sequence;

[0117] The second determination subunit is used to determine the average concentration and concentration distribution of the flue gas pollutants on the flue cross section by using the collected flue gas pollutants.

[0118] The embodiments of the present application also provide corresponding devices and computer storage media for implementing the solutions provided by the embodiments of the present application.

[0119] The device includes a memory and a processor, the memory is used to store instructions or codes, and the processor is used to execute the instructions or codes so that the device executes the method described in any embodiment of the present application.

[0120] The computer storage medium stores codes, and when the codes are executed, a device executing the codes implements the method described in any embodiment of the present application.

[0121] Through the description of the above implementation methods, it can be known that those skilled in the art can clearly understand that all or part of the steps in the above-mentioned embodiment method can be implemented by means of software plus a general hardware platform. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, and the computer software product can be stored in a storage medium, such as a read-only memory (ROM) / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network communication device such as a router) to execute the methods described in each embodiment of the present application or some parts of the embodiments.

[0122] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0123] It should also be noted that the various embodiments in this specification are described in a progressive manner, and the same and similar parts between the various embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the equipment and device embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The device embodiments described above are merely schematic, in which the units described as separate components may or may not be physically separated, and the components prompted as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0124] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for measuring flue gas pollutants, characterized in that: include: Obtaining measuring hole positions of multiple measuring holes; Arranging a plurality of measuring points in depth directions of the plurality of measuring holes according to the measuring hole positions of the plurality of measuring holes; Measuring the flue gas flow field and concentration field on the flue cross section based on the measuring hole positions of the multiple measuring holes to obtain the flow field distribution and concentration field distribution at different points on the flue cross section; the flue cross section includes the multiple measuring holes; According to the flow field distribution and concentration field distribution at different points on the flue cross section, the mean flow velocity and the mean concentration of the multiple measuring holes in the depth direction are calculated; Multiplying the mean values ​​of flow velocities of the plurality of measuring holes in the depth direction by the mean values ​​of concentrations of the plurality of measuring holes in the depth direction to obtain the average fluxes corresponding to the plurality of measuring holes; Based on the measurement hole positions of the multiple measurement holes, the flue gas flow field and concentration field on the flue cross section are measured to obtain the flow field distribution and concentration field distribution at different points on the flue cross section; the different points on the flue cross section include multiple measurement points of the multiple measurement holes in the depth direction; According to the flow field distribution and concentration field distribution at different points on the flue cross section, the fluxes corresponding to the multiple measuring points of the multiple measuring holes in the depth direction are calculated; Determine, among a plurality of measuring points of each measuring hole in the depth direction, a measuring point whose flux is closest to the average flux corresponding to the measuring hole as an equivalent measuring point corresponding to the measuring hole; The flue gas pollutants are measured using equivalent measuring points corresponding to the multiple measuring holes.

2. The method according to claim 1, characterized in that: The method of measuring the flue gas pollutants by using the equivalent measuring points respectively corresponding to the plurality of measuring holes includes: The flue gas pollutants are measured in sequence using the equivalent measuring points corresponding to the multiple measuring holes respectively, so as to obtain the average concentration and concentration distribution of the flue gas pollutants on the flue cross section.

3. The method according to claim 2, characterized in that The method of sequentially measuring the flue gas pollutants using the equivalent measuring points corresponding to the plurality of measuring holes to obtain the average concentration and concentration distribution of the flue gas pollutants on the flue cross section includes: Determine the target sampling volume according to the preset time; After sampling the flue gas pollutants at the first equivalent measuring point for the preset time, sampling the flue gas pollutants at the target sampling amount in sequence at each of the remaining equivalent measuring points; The collected flue gas pollutants are used to determine the average concentration and concentration distribution of the flue gas pollutants on the flue cross section.

4. A flue gas pollutant measuring device, characterized in that: include: An acquisition module, used for acquiring the measuring hole positions of multiple measuring holes; An arrangement module, configured to arrange a plurality of measuring points in a depth direction of the plurality of measuring holes according to the measuring hole positions of the plurality of measuring holes; The first determination module includes: A first measuring unit is used to measure the flue gas flow field and concentration field on the flue cross section based on the measuring hole positions of the multiple measuring holes to obtain the flow field distribution and concentration field distribution at different points on the flue cross section; the flue cross section includes the multiple measuring holes; A first calculation unit is used to calculate the mean flow velocity and the mean concentration of the plurality of measuring holes in the depth direction according to the flow field distribution and the concentration field distribution at different points on the flue cross section; A second calculation unit is used to multiply the mean flow velocity of the plurality of measuring holes in the depth direction by the mean concentration of the plurality of measuring holes in the depth direction to obtain the average flux corresponding to the plurality of measuring holes; The second determination module includes: A second measuring unit is used to measure the flue gas flow field and concentration field on the flue cross section based on the measuring hole positions of the multiple measuring holes, and obtain the flow field distribution and concentration field distribution at different points on the flue cross section; the different points on the flue cross section include multiple measuring points of the multiple measuring holes in the depth direction; A third calculation unit is used to calculate the fluxes corresponding to the multiple measuring points of the multiple measuring holes in the depth direction according to the flow field distribution and the concentration field distribution at different points on the flue cross section; The third determination module includes: A first determining unit is used to determine, among a plurality of measuring points in the depth direction of each measuring hole, a measuring point whose flux is closest to an average flux corresponding to the measuring hole as an equivalent measuring point corresponding to the measuring hole; The measuring module is used to measure the flue gas pollutants by using the equivalent measuring points corresponding to the multiple measuring holes.

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