SNCR denitration test method, device, electronic equipment and storage medium

Abstract

The application provides an SNCR denitration test method, device, electronic equipment and storage medium. The method comprises the following steps: determining a plurality of target denitration lances based on the average temperature of the separator inlet of a circulating fluidized bed boiler; controlling the target denitration lances to perform SNCR denitration tests according to each group of test working condition parameters comprising a denitration reducing agent flow rate proportion value corresponding to each target denitration lance, and obtaining test data of each test cycle under each group of test working condition parameters; respectively judging whether the stable test data meets at least one of a plurality of preset conditions, and screening target test data meeting all preset conditions from the stable test data, so as to determine the target denitration reducing agent flow rate proportion value corresponding to each target denitration lance under the target denitration efficiency corresponding to a plurality of load values. Through the above method, the effect and stability of SNCR denitration under different working conditions are improved, and the denitration efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pollutant emission control of circulating fluidized bed boilers, and in particular to an SNCR denitration test method and device, electronic equipment and a storage medium. BACKGROUND

[0002] When the pollutants of the circulating fluidized bed boiler are discharged, due to the increasingly stringent environmental protection requirements, while facing the operation status of large fuel fluctuation, frequent load change, and increasing low load time, it is difficult to control nitrogen oxides, the economic cost is high, and the SNCR denitration process is generally used in the circulating fluidized bed boiler denitration process.

[0003] At present, in the technology for treating nitrogen oxides generated by the circulating fluidized bed boiler, the SNCR denitration process mainly improves the denitration efficiency by increasing the number of spray guns or modifying the structure of the spray guns. This improvement method has poor effect, and due to the uncertainty of the denitration effect, the applicability on different circulating fluidized bed units is poor. In addition, due to the unclear combination of the spray guns in operation at different positions under different working conditions, the consumption of denitration reducing agent is high, thereby reducing the stability of the SNCR denitration. SUMMARY

[0004] Therefore, the purpose of the present application is to provide an SNCR denitration test method and device, electronic equipment and a storage medium. By determining the target denitration spray gun based on the temperature mean value of the denitration spray gun arranged at multiple area positions in the circulating fluidized bed boiler, the target denitration spray gun is controlled by multiple sets of test working condition parameters to perform SNCR denitration test for at least one test cycle. The test data under each set of test working condition parameters is fully obtained by using the data acquisition equipment arranged at multiple detection positions, and then the test data is conditionally screened to obtain target test data with strong characteristics. The target denitration reducing agent flow rate ratio value corresponding to each target denitration spray gun under the target denitration efficiency corresponding to multiple load values is determined, the denitration efficiency is improved, and the stability of the circulating fluidized bed boiler under different working conditions is improved. SNCR denitration.

[0005] The present application provides an SNCR denitration test method, which is applied to a circulating fluidized bed boiler; the circulating fluidized bed boiler comprises a plurality of denitration spray guns arranged at multiple area positions and a plurality of data acquisition devices arranged at multiple detection positions; the method comprises:

[0006] Based on the temperature mean value corresponding to the separator inlet of the circulating fluidized bed boiler, a plurality of target denitration spray guns are determined in the denitration spray gun.

[0007] control the target denitration lance to perform SNCR denitration test for at least one test cycle according to each set of test working condition parameters until the duration of the SNCR denitration test is greater than a preset time threshold, and use the data acquisition device to obtain test data corresponding to each test cycle under each set of test working condition parameters; wherein the test working condition parameters include a denitration reducing agent flow rate ratio value corresponding to each target denitration lance;

[0008] For stable test data in the test data, it is judged whether each set of test data in the stable test data satisfies at least one of a plurality of preset conditions, and based on the judgment result, target test data satisfying all the preset conditions are selected from the stable test data;

[0009] Based on the target test data, a target denitration reducing agent flow rate ratio value corresponding to each target denitration lance under a target denitration efficiency corresponding to a plurality of load values is determined.

[0010] Further, the region position includes a separator inlet, a separator outlet, a dense phase zone, a dilute phase zone and an air chamber; based on the average temperature value of the separator inlet of the circulating fluidized bed boiler collected, a plurality of target denitration lances are determined in the denitration lance, comprising:

[0011] Obtain the average temperature value of the separator inlet of the circulating fluidized bed boiler collected, and judge whether the average temperature value is greater than a preset temperature threshold;

[0012] If the average temperature value is greater than the preset temperature threshold, the denitration lances corresponding to the separator inlet and the separator outlet are determined as target denitration lances;

[0013] If the average temperature value is less than or equal to the preset temperature threshold, the denitration lance corresponding to the separator outlet is determined as a target denitration lance, and one target denitration lance is determined in the denitration lances corresponding to the dense phase zone, the dilute phase zone and the air chamber, respectively.

[0014] Further, the control of the target denitration lance to perform SNCR denitration test for at least one test cycle according to each set of test working condition parameters until the duration of the SNCR denitration test is greater than a preset time threshold, and use the data acquisition device to obtain test data corresponding to each test cycle under each set of test working condition parameters, comprises:

[0015] For each of the preset groups of test working condition parameters, in each test period, the target denitration lance is controlled to perform SNCR denitration test under the test working condition parameters in the test period, and the data acquisition device is used to obtain test data corresponding to the test period under the test working condition parameters;

[0016] Based on the multiple load values included in the test data, a target load fluctuation rate corresponding to the test period is calculated, and it is judged whether the target load fluctuation rate is less than a preset fluctuation rate threshold, to obtain a first judgment result;

[0017] Based on the first judgment result, the test data corresponding to the test period under the test working condition parameters is determined as stable test data or fluctuation test data, and SNCR denitration test of the next test period is performed according to the next group of test working condition parameters or the test working condition parameters;

[0018] The SNCR denitration test of at least one test period under the multiple groups of test working condition parameters is performed in a cycle until the duration of the SNCR denitration test is greater than a preset time threshold, and stable test data and fluctuation test data corresponding to each test period under each test working condition parameter are obtained.

[0019] Further, based on the first judgment result, the test data corresponding to the test period under the test working condition parameters is determined as stable test data or fluctuation test data, and SNCR denitration test of the next test period is performed according to the next group of test working condition parameters or the test working condition parameters, comprising:

[0020] When the first judgment result is that the target load fluctuation rate is less than the preset fluctuation rate threshold, the test data corresponding to the test period under the test working condition parameters is determined as stable test data, and SNCR denitration test of the next test period is performed according to the next group of test working condition parameters;

[0021] When the first judgment result is that the target load fluctuation rate is greater than or equal to the preset fluctuation rate threshold, the test data corresponding to the test period under the test working condition parameters is determined as fluctuation test data, and SNCR denitration test of the next test period is performed according to the test working condition parameters.

[0022] Further, the test data at least includes the load value and the flue gas flow of the circulating fluidized bed boiler, the nitrogen oxide concentration value corresponding to each detection position, and the ammonia molecule number corresponding to each target denitration lance.

[0023] Further, the test data further comprises a denitration efficiency and an ammonia-nitrogen molar ratio corresponding to each of the target denitration lances; the denitration efficiency and the ammonia-nitrogen molar ratio are obtained by the following steps:

[0024] Based on the nitrogen oxide concentration value, a preset efficiency calculation formula is used to determine and obtain the denitration efficiency corresponding to each of the target denitration lances;

[0025] Based on the nitrogen oxide concentration value, the ammonia molecule molar number and the flue gas flow, a preset molar number calculation formula is used to determine and obtain the ammonia-nitrogen molar ratio corresponding to each of the target denitration lances.

[0026] Further, the method further comprises:

[0027] For each of the stable test data, it is judged whether the test data meets at least one of the preset conditions, and a second judgment result is obtained;

[0028] When the second judgment result is that the test data does not meet all the preset conditions, the test data is determined as the alternative test data;

[0029] When the second judgment result is that the test data meets all the preset conditions, the test data is determined as the target test data.

[0030] The application further provides an SNCR denitration test device, which comprises:

[0031] A lance determination module is configured to determine a plurality of target denitration lances from the denitration lances based on the average temperature of the separator inlet of the circulating fluidized bed boiler collected;

[0032] A denitration test module is configured to control the target denitration lances to perform an SNCR denitration test for at least one test cycle according to each of the test working condition parameters until the duration of the SNCR denitration test is greater than a preset time threshold, and to obtain test data corresponding to each of the test cycles under each of the test working condition parameters by using a data acquisition device; wherein the test working condition parameters comprise a denitration reducing agent flow rate ratio value corresponding to each of the target denitration lances.

[0033] a data screening module configured to, for the stable test data in the test data, determine whether each group of test data in the stable test data satisfies at least one of a plurality of preset conditions, and based on a determination result, screen target test data satisfying all the preset conditions from the stable test data;

[0034] a data analysis module configured to, based on the target test data, determine a target denitration reductant flow rate proportion value corresponding to each of the target denitration lances under a target denitration efficiency corresponding to a plurality of load values.

[0035] Further, the region positions of the circulating fluidized bed boiler include a separator inlet, a separator outlet, a dense phase zone, a dilute phase zone, and an air chamber; when the lance determination module is configured to determine a plurality of target denitration lances based on a temperature mean value corresponding to the separator inlet of the circulating fluidized bed boiler collected by the data acquisition device, the lance determination module is configured to:

[0036] acquire the temperature mean value corresponding to the separator inlet of the circulating fluidized bed boiler collected by the data acquisition device, and determine whether the temperature mean value is greater than a preset temperature threshold value;

[0037] if the temperature mean value is greater than the preset temperature threshold value, the denitration lances corresponding to the separator inlet and the separator outlet are determined as the target denitration lances;

[0038] if the temperature mean value is less than or equal to the preset temperature threshold value, the denitration lance corresponding to the separator outlet is determined as a target denitration lance, and one target denitration lance is determined from the denitration lances corresponding to the dense phase zone, the dilute phase zone, and the air chamber, respectively.

[0039] Further, when the denitration test module is configured to control the target denitration lance to perform an SNCR denitration test according to each of a plurality of preset groups of test operating parameters for at least one test cycle until a duration of the SNCR denitration test is greater than a preset time threshold value, and acquire test data corresponding to each of the test cycles under each of the test operating parameters by using the data acquisition device, the denitration test module is configured to:

[0040] for each of the test operating parameters in the plurality of preset groups of test operating parameters, control the target denitration lance to perform an SNCR denitration test according to the test operating parameter in the test cycle in each test cycle, and acquire test data corresponding to the test cycle under the test operating parameter by using the data acquisition device;

[0041] based on a plurality of load values included in the test data, calculate a target load fluctuation rate corresponding to the test cycle, and determine whether the target load fluctuation rate is less than a preset fluctuation rate threshold value to obtain a first determination result;

[0042] determine the test data corresponding to the test period under the set of test operating parameters as stable test data or fluctuation test data based on the first determination result, and perform the SNCR denitration test of the next test period according to the next set of test operating parameters or the set of test operating parameters;

[0043] perform the SNCR denitration test of at least one test period under the multiple sets of test operating parameters in a cycle until the duration of the SNCR denitration test is greater than a preset time threshold, and obtain the stable test data and the fluctuation test data corresponding to each test period under each set of test operating parameters.

[0044] Further, when the denitration test module is used to determine the test data corresponding to the test period under the set of test operating parameters as stable test data or fluctuation test data based on the first determination result, and perform the SNCR denitration test of the next test period according to the next set of test operating parameters or the set of test operating parameters, the denitration test module is used to:

[0045] when the first determination result is that the target load fluctuation rate is less than a preset fluctuation rate threshold, determine the test data corresponding to the test period under the set of test operating parameters as stable test data, and perform the SNCR denitration test of the next test period according to the next set of test operating parameters;

[0046] when the first determination result is that the target load fluctuation rate is greater than or equal to a preset fluctuation rate threshold, determine the test data corresponding to the test period under the set of test operating parameters as fluctuation test data, and perform the SNCR denitration test of the next test period according to the set of test operating parameters.

[0047] Further, the test data at least includes the load value and the flue gas flow of the circulating fluidized bed boiler, the nitrogen oxide concentration value corresponding to each detection position, and the ammonia molecule molar number corresponding to each target denitration lance.

[0048] Further, the test data further includes the denitration efficiency and the ammonia-nitrogen molar ratio value corresponding to each target denitration lance; when the denitration test module is used to obtain the denitration efficiency and the ammonia-nitrogen molar ratio value, the denitration test module is used to:

[0049] based on the nitrogen oxide concentration value, determine and obtain the denitration efficiency corresponding to each target denitration lance by using a preset efficiency calculation formula;

[0050] based on the nitrogen oxide concentration value, the ammonia molecule molar number, and the flue gas flow, determine and obtain the ammonia-nitrogen molar ratio value corresponding to each target denitration lance by using a preset molar number calculation formula.

[0051] Further, the data screening module is configured to:

[0052] for each group of the stable test data, respectively determine whether the group of the stable test data satisfies at least one of the preset conditions, to obtain a second determination result;

[0053] when the second determination result is that the group of the stable test data does not satisfy all the preset conditions, the group of the stable test data is determined as the candidate test data;

[0054] when the second determination result is that the group of the stable test data satisfies all the preset conditions, the group of the stable test data is determined as the target test data.

[0055] The embodiment of the present application further provides an electronic device, comprising a processor, a memory and a bus, the memory stores machine readable instructions executable by the processor, when the electronic device is running, the processor and the memory communicate through the bus, and the machine readable instructions are executed by the processor to perform the steps of the SNCR denitration test method.

[0056] The embodiment of the present application further provides a computer readable storage medium, the computer readable storage medium stores a computer program, and the computer program is executed by the processor to perform the steps of the SNCR denitration test method.

[0057] The SNCR denitration test method, device, electronic equipment and storage medium provided by the embodiment of the application, the method is applied to a circulating fluidized bed boiler; the circulating fluidized bed boiler comprises a plurality of denitration spray guns arranged at a plurality of region positions respectively and a plurality of data acquisition devices arranged at a plurality of detection positions respectively, and the method comprises the following steps: based on a temperature average value corresponding to a separator inlet of the circulating fluidized bed boiler, a plurality of target denitration spray guns are determined in the denitration spray guns; based on a plurality of preset test working condition parameters, the target denitration spray guns are controlled to perform an SNCR denitration test for at least one test cycle according to each group of test working condition parameters until the duration of the SNCR denitration test is greater than a preset time threshold, and test data corresponding to each test cycle under each group of test working condition parameters is acquired by using the data acquisition devices; wherein the test working condition parameters comprise a denitration reducing agent flow rate ratio value corresponding to each target denitration spray gun; for stable test data in the test data, whether each group of test data in the stable test data satisfies at least one of a plurality of preset conditions is judged respectively, and based on the judgment result, target test data satisfying all the preset conditions is screened out from the stable test data; based on the target test data, a target denitration reducing agent flow rate ratio value corresponding to each target denitration spray gun under a target denitration efficiency corresponding to a plurality of load values is determined.

[0058] Compared with the method for improving nitrogen oxides in the prior art by increasing the number of spray guns or modifying the structure of the spray guns, target denitration spray guns are determined based on the temperature average value in the denitration spray guns arranged at a plurality of region positions in the circulating fluidized bed boiler, the target denitration spray guns are controlled to perform an SNCR denitration test for at least one test cycle by using a plurality of test working condition parameters, the test data under each group of test working condition parameters is fully acquired by using the data acquisition devices arranged at a plurality of detection positions, the test data is conditionally screened, the target test data with stronger characteristics is obtained, and a target denitration reducing agent flow rate ratio value corresponding to each target denitration spray gun under a target denitration efficiency corresponding to a plurality of load values is determined, thereby improving the denitration efficiency and improving the stability of the SNCR denitration under different working conditions of the circulating fluidized bed boiler.

[0059] In order to make the above objectives, characteristics and advantages of the application more apparent, clear and easy to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are referred to, and the detailed description is as follows. BRIEF DESCRIPTION OF DRAWINGS

[0060] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0061] Figure 1 A setting schematic diagram of a circulating fluidized bed boiler provided by an embodiment of the present application;

[0062] Figure 2 A flow chart of an SNCR denitration test method provided by an embodiment of the present application;

[0063] Figure 3 A device schematic diagram of SNCR denitration provided by an embodiment of the present application;

[0064] Figure 4 A structure schematic diagram of an SNCR denitration test device provided by an embodiment of the present application;

[0065] Figure 5 A structure schematic diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0066] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, every other embodiment obtained by a person skilled in the art without creative work belongs to the scope of protection of the present application.

[0067] It is found through research that, in the technology for treating the nitrogen oxides generated by the circulating fluidized bed boiler, the SNCR denitration process mainly improves the denitration efficiency in the manner of increasing the number of spray guns or modifying the structure of the spray guns, which has poor effect, and due to the uncertainty of the denitration effect, the applicability on different circulating fluidized bed units is poor. In addition, due to the unclear combination of the spray guns in different positions under different working conditions, the consumption of the denitration reducing agent is high, which reduces the stability of the SNCR denitration.

[0068] Based on this, the embodiment of the present application provides a SNCR denitration test method, which determines a target denitration lance based on the average temperature in the denitration lance arranged at multiple region positions in the circulating fluidized bed boiler, controls the target denitration lance to perform SNCR denitration test for at least one test cycle by using multiple sets of test working condition parameters, fully acquires test data under each set of test working condition parameters by using data acquisition equipment arranged at multiple detection positions, and then performs condition screening on the test data to obtain target test data with strong characteristics, so as to determine the target denitration reductant flow rate ratio value corresponding to each target denitration lance under the target denitration efficiency corresponding to multiple load values, thereby improving the SNCR denitration effect and the denitration efficiency, and further improving the stability of the circulating fluidized bed boiler in different working conditions of SNCR denitration.

[0069] Please refer to Figure 1 , Figure 1 A setting schematic diagram of a circulating fluidized bed boiler is provided in the embodiment of the present application. As shown in Figure 1 The SNCR denitration test method provided in the embodiment of the present application is generally applied to a circulating fluidized bed boiler, and the circulating fluidized bed boiler includes denitration lances arranged at multiple region positions and data acquisition equipment arranged at multiple detection positions.

[0070] It should be noted that the circulating fluidized bed boiler (CFB boiler) is a kind of efficient combustion equipment, which realizes more complete combustion and lower emission by keeping the solid fuel particles in a suspended state in the furnace for combustion; wherein, when air is supplied to the circulating fluidized bed boiler, primary air enters from the bottom to provide sufficient oxygen to support fuel combustion; secondary air is supplemented in time as needed to optimize the combustion process, and when the speed of the primary air exceeds a certain threshold, it will make the fuel particles suspended to form a "boiling" fluidized bed layer. In this state, the fuel contacts with oxygen more fully, improving the combustion efficiency.

[0071] Here, SNCR denitration is a kind of selective non-catalytic reduction (SNCR) denitration technology, which is used to reduce the emission of nitrogen oxides (NOx) generated in the combustion process. In the SNCR denitration process, nitrogen-containing compounds such as ammonia (NH3) or urea are sprayed into the furnace at a temperature interval, react with nitrogen oxides (NOx) to generate nitrogen (N2) and water (H2O), without the need for a catalyst. The reaction occurs without a catalyst, so it is called non-catalytic reduction.

[0072] In the embodiment of the present application, as Figure 1As shown in the figure, the multiple region positions of the circulating fluidized bed boiler can include a separator inlet (position 1), a separator outlet (position 2), a dense phase zone (position 3), a dilute phase zone (position 4), and an air chamber (position 5); and the multiple detection positions of the circulating fluidized bed boiler can include a separator inlet (measurement point 1), a separator outlet (measurement point 2), and an economizer inlet (measurement point 3).

[0073] In the engineering application of the circulating fluidized bed boiler, generally, the denitration spray gun is not installed at all positions at the same time, and generally, under the SNCR denitration process, the denitration spray gun is only installed at the separator inlet (position 1); when the removal of nitrogen oxides cannot meet the emission requirements, the denitration spray gun is installed at the separator outlet (position 2); and when the circulating fluidized bed boiler is at low load or there is difficulty in denitration during the start-up stage, the denitration spray gun is additionally arranged in the furnace, and generally, the denitration spray gun is selected and arranged at one of the dense phase zone (position 3), the dilute phase zone (position 4), and the air chamber (position 5) based on the temperature of the separator inlet.

[0074] Here, because of the separator inlet (measurement point 1), the separator outlet (measurement point 2), and the economizer inlet (measurement point 3), there are large differences in the flue gas parameters at the three measurement point positions, and therefore, according to the actual position and the process requirements of the SNCR denitration, a suitable data acquisition device is selected to realize stable and effective data acquisition, and for example, the separator inlet (measurement point 1) generally adopts in-situ measurement, and the separator outlet (measurement point 2) and the economizer inlet (measurement point 3) generally adopt extraction measurement.

[0075] Please refer to Figure 2 , Figure 2 A flowchart of an SNCR denitration test method provided by an embodiment of the present application. As shown in the figure, Figure 2 As shown in the figure, the SNCR denitration test method provided by the embodiment of the present application is generally applied to a circulating fluidized bed boiler, and the method comprises the following steps:

[0076] S101, based on the temperature average value of the separator inlet of the circulating fluidized bed boiler, multiple target denitration spray guns are determined in the denitration spray gun.

[0077] In the embodiment of the present application, the denitration spray gun includes a denitration spray gun corresponding to each of the region positions of the separator inlet, the separator outlet, the dense phase zone, the dilute phase zone, and the air chamber.

[0078] In this step, the average temperature collected by the data acquisition device at the separator inlet is compared with the preset temperature threshold value, and while determining the denitration lance corresponding to the separator outlet as the target denitration lance, one of the denitration lances corresponding to the separator inlet or the dense phase zone, the dilute phase zone and the wind chamber is selected as the target denitration lance based on the comparison result of the average temperature and the preset temperature threshold value.

[0079] In this way, the target denitration lance is selected from the separator inlet, the dense phase zone, the dilute phase zone and the wind chamber based on the average temperature corresponding to the separator inlet to meet the process requirements of SNCR denitration at different temperatures.

[0080] In an embodiment of the present application, in specific implementation, step S101 can include:

[0081] S1011, acquire the average temperature corresponding to the separator inlet of the circulating fluidized bed boiler collected by the data acquisition device, and determine whether the average temperature is greater than a preset temperature threshold value.

[0082] In this step, the average temperature collected by the data acquisition device (measurement point 1) at the separator inlet is compared with the preset temperature threshold value to determine whether the average temperature is greater than the preset temperature threshold value.

[0083] The preset temperature threshold value can be specifically calibrated according to the process requirements of SNCR denitration and the equipment parameters of the circulating fluidized bed boiler.

[0084] S1012, if the average temperature is greater than the preset temperature threshold value, the denitration lances corresponding to the separator inlet and the separator outlet are determined as the target denitration lances.

[0085] In this step, when the average temperature at the separator inlet is greater than the preset temperature threshold value, it indicates that the working temperature at this time is sufficient for the denitration lance corresponding to the separator inlet to work, and then the denitration lances corresponding to the separator inlet and the separator outlet are determined as the target denitration lances.

[0086] S1013, if the average temperature is less than or equal to the preset temperature threshold value, the denitration lance corresponding to the separator outlet is determined as the target denitration lance, and one target denitration lance is determined from the denitration lances corresponding to the dense phase zone, the dilute phase zone and the wind chamber.

[0087] In this step, when the average temperature at the separator inlet is less than or equal to a preset temperature threshold, it indicates that the working temperature at this time is difficult to meet the working of the denitration lance corresponding to the separator inlet, and it is necessary to continue to find a suitable lance in the preposition, that is, to determine a target denitration lance among the denitration lances corresponding to the dense phase zone, the dilute phase zone and the plenum. Here, the selection of the denitration lances corresponding to the dense phase zone, the dilute phase zone and the plenum can be determined according to the actual temperature value of the average temperature.

[0088] In S102, based on the preset multiple sets of test working condition parameters, the target denitration lance is controlled to perform SNCR denitration test for at least one test cycle according to each set of test working condition parameters, until the duration of the SNCR denitration test is greater than a preset time threshold, and the data acquisition device is used to obtain test data corresponding to each test cycle under each set of test working condition parameters; wherein the test working condition parameters include a denitration reducing agent flow rate ratio value corresponding to each target denitration lance.

[0089] Please refer to Figure 3 , Figure 3 A schematic diagram of an SNCR denitration device provided by an embodiment of the present application. As shown in Figure 3 When the target denitration lance is controlled to perform SNCR denitration test for at least one test cycle according to each set of test working condition parameters, electric regulating valves A and B and electromagnetic flowmeters A and B are respectively installed in the dilution water tank corresponding pipeline and the denitration reducing agent tank corresponding pipeline in the total pipe to accurately control the total flow rate; after the dilution water and the denitration reducing agent flow into the mixer, the pressure of the total pipeline is monitored in real time by the installed pressure transmitter A to ensure that the pressure of the pipeline and the pressure of the lance atomization are within the pressure limit; electric regulating valves and electromagnetic flowmeters are installed in the branch pipelines from the mixer to the denitration lances at each region position to accurately control the flow rate of each branch pipeline.

[0090] The electric regulating valve is used to adjust the opening of the pipeline to control the output flow rate, and the electromagnetic flowmeter is used to monitor the flow rate value of the pipeline to accurately control the flow rate of each pipeline.

[0091] In the present embodiment, in the preset multiple sets of test working condition parameters, each set of test working condition parameters includes a denitration reducing agent flow rate ratio value corresponding to each target denitration lance.

[0092] For example, when the target denitration lances are the denitration lances corresponding to the separator inlet and the separator outlet respectively, an example of a preset multiple sets of test working condition parameters is shown in the following table.

[0093]

[0094] In the embodiments of the present application, the test data at least includes the load value and flue gas flow of the circulating fluidized bed boiler, the nitrogen oxide concentration value corresponding to each detection position, and the ammonia molecule number corresponding to each target denitration spray gun.

[0095] Further, the test data can also include, but is not limited to, the coal supply amount of the circulating fluidized bed boiler, the primary air amount, the secondary air amount, the air preheater inlet oxygen amount, the in-furnace desulfurizer supply amount, the bed temperature, the bed pressure, the furnace differential pressure, the separator inlet flue gas temperature, the separator outlet flue gas temperature, the denitration reducing agent consumption, the denitration dilution water consumption, and the denitration main pipe pressure.

[0096] In an embodiment of the present application, in specific implementation, the test data further includes the denitration efficiency and the ammonia nitrogen molar ratio value corresponding to each target denitration spray gun, and the step of obtaining the denitration efficiency and the ammonia nitrogen molar ratio in step S102 can include:

[0097] S102A, based on the nitrogen oxide concentration value, determining and obtaining the denitration efficiency corresponding to each target denitration spray gun by using a preset efficiency calculation formula.

[0098] In this step, the nitrogen oxide concentration value corresponding to the target denitration spray gun is input into the preset efficiency calculation formula, and the denitration efficiency corresponding to each target denitration spray gun is determined and obtained by calculation.

[0099] In the embodiments of the present application, when the target denitration spray gun is the denitration spray gun at the separator inlet (position 1) and the separator outlet (position 2) respectively, the expression of the preset efficiency calculation formula is as follows.

[0100]

[0101] wherein η SA1 and η SA2 respectively represent the denitration efficiency corresponding to the denitration spray gun at the separator inlet (position 1) and the denitration efficiency corresponding to the denitration spray gun at the separator outlet (position 2); c(NOx) SAx represents the nitrogen oxide concentration value corresponding to each detection position, and the unit is mg / Nm 3 .

[0102] S102B, based on the nitrogen oxide concentration value, the ammonia molecule number, and the flue gas flow, determining and obtaining the ammonia nitrogen molar ratio value corresponding to each target denitration spray gun by using a preset molar number calculation formula.

[0103] In this step, the nitrogen oxide concentration value corresponding to the target denitration lance, the ammonia molecule number corresponding to each target denitration lance, and the flue gas flow of the circulating fluidized bed boiler are respectively input into the preset molar number calculation formula, and the ammonia nitrogen molar ratio value corresponding to each target denitration lance is determined and obtained by calculation.

[0104] In the embodiments of the present application, when the target denitration lance is the denitration lance at the inlet (position 1) and the outlet (position 2) of the separator respectively, the expression of the preset molar number calculation formula is as follows.

[0105]

[0106] wherein, NSR A1 and NSR A2 respectively represent the denitration efficiency corresponding to the denitration lance at the inlet (position 1) of the separator and the ammonia nitrogen molar ratio value of the denitration lance at the outlet (position 2) of the separator, which are dimensionless; V Ay represents the flue gas flow of the circulating fluidized bed boiler; c(NOx) SAx represents the nitrogen oxide concentration value corresponding to each detection position, which is in mg / Nm 3 ; n(NH3) Ax represents the ammonia molecule number corresponding to each target denitration lance, which is in mol.

[0107] In an embodiment of the present application, in specific implementation, step S102 can include:

[0108] S1021, for each set of test working condition parameters in the preset multiple sets of test working condition parameters, in each test period, controlling the target denitration lance to perform SNCR denitration test under the test working condition parameters in the test period, and obtaining the test data corresponding to the test period under the test working condition parameters by using the data acquisition device.

[0109] In this step, for each set of test working condition parameters in the preset multiple sets of test working condition parameters, the target denitration lance is controlled to perform SNCR denitration test under each set of test working condition parameters in each test period, and at the same time, the test data corresponding to the test period under the test working condition parameters is obtained by using the data acquisition device set at each detection position.

[0110] In the embodiments of the present application, in each test period, the target denitration lance can be controlled to perform multiple SNCR denitration tests under the test working condition parameters until the test time of the SNCR denitration test reaches the time step corresponding to each test period.

[0111] In the embodiment of the present application, the time step corresponding to each test cycle can be set as 60 minutes, or can be set as other time according to the technical SCNR process requirement, which is not limited herein.

[0112] S1022, based on the plurality of load values included in the test data, the target load fluctuation rate corresponding to the test cycle is calculated, and it is judged whether the target load fluctuation rate is less than the preset fluctuation rate threshold, to obtain a first judgment result.

[0113] In this step, when the target denitration lance is controlled to perform multiple SNCR denitration tests under the test cycle according to the set of test working condition parameters, based on the load values corresponding to the multiple SNCR denitration tests included in the obtained test data, the difference between adjacent two load values is calculated according to the time sequence of the obtained load values, that is, the load fluctuation rate is calculated, to obtain a plurality of load fluctuation rates corresponding to the test cycle, and the maximum load fluctuation rate is determined in the plurality of load fluctuation rates, to obtain the target load fluctuation rate corresponding to the test cycle.

[0114] Further, the target load fluctuation rate and the preset fluctuation rate threshold are compared to judge whether the target load fluctuation rate is less than the preset fluctuation rate threshold, to obtain a first judgment result.

[0115] In the embodiment of the present application, the preset fluctuation rate threshold is generally set as 5%, or can be set as other ratio according to the technical SCNR process requirement, which is not limited herein.

[0116] S1023, based on the first judgment result, the test data corresponding to the test cycle under the set of test working condition parameters is determined as stable test data or fluctuation test data, and the SNCR denitration test of the next test cycle is performed according to the next set of test working condition parameters or the set of test working condition parameters.

[0117] In the embodiment of the present application, for the stable test data, a plurality of sets of test data of each set of test working condition corresponding to different load values in a plurality of load change intervals can be obtained in the stable test data.

[0118] In one embodiment of the present application, in the specific implementation, step S1023 can include:

[0119] S10231, when the first judgment result is that the target load fluctuation rate is less than the preset fluctuation rate threshold, the test data corresponding to the test cycle under the set of test working condition parameters is determined as stable test data, and the SNCR denitration test of the next test cycle is performed according to the next set of test working condition parameters.

[0120] When the target load fluctuation rate is less than the preset fluctuation rate threshold, it is determined that the data stability of the test data is high, the test data corresponding to the test period under the test working condition parameters is determined as stable test data, and the SNCR denitration test of the next test period is performed according to the next set of test working condition parameters.

[0121] Further, the stable test data is stored in a preset stable database (a first database 1, DL I), and the stable database is used to store stable test data.

[0122] For example, after the target denitration lance is controlled to perform the SNCR denitration test corresponding to the current test period according to the denitration reductant flow rate proportional value corresponding to the test working condition 1, if the target load fluctuation rate of the current test period is less than the preset fluctuation rate threshold, the target denitration lance is controlled to perform the SNCR denitration test corresponding to the next test period according to the denitration reductant flow rate proportional value corresponding to the test working condition 2.

[0123] S10232, when the first judgment result is that the target load fluctuation rate is greater than or equal to the preset fluctuation rate threshold, the test data corresponding to the test period under the test working condition parameters is determined as fluctuation test data, and the SNCR denitration test of the next test period is performed according to the test working condition parameters.

[0124] When the target load fluctuation rate is greater than or equal to the preset fluctuation rate threshold, it is determined that the data stability of the test data is low, the test data corresponding to the test period under the test working condition parameters is determined as fluctuation test data, and the SNCR denitration test of the next test period is performed according to the test working condition parameters.

[0125] Further, the fluctuation test data is stored in a preset fluctuation database (a second database 1, DL II), and the fluctuation database is used to store fluctuation test data.

[0126] For example, after the target denitration lance is controlled to perform the SNCR denitration test corresponding to the current test period according to the denitration reductant flow rate proportional value corresponding to the test working condition 1, if the target load fluctuation rate of the current test period is greater than or equal to the preset fluctuation rate threshold, the target denitration lance is controlled to continue to perform the SNCR denitration test corresponding to the next test period according to the denitration reductant flow rate proportional value corresponding to the test working condition 1.

[0127] S1024, the SNCR denitration test of at least one test period under the plurality of sets of test working condition parameters is circularly performed until the duration of the SNCR denitration test is greater than a preset time threshold, and the stable test data and the fluctuation test data corresponding to each test period under each set of test working condition parameters are obtained.

[0128] In this step, when the control target denitration lance performs the SNCR denitration test according to the multiple sets of test working condition parameters for at least one test cycle, it is determined whether the duration of the SNCR denitration test is greater than a preset time threshold to ensure the integrity and reliability of the test data. When the duration of the SNCR denitration test is greater than the preset time threshold, the SNCR denitration test is ended, and the stable test data and fluctuation test data corresponding to each test cycle under each set of test working condition parameters are obtained.

[0129] In this step, for the stable test data in the test data, it is determined whether each set of test data in the stable test data satisfies at least one of the multiple preset conditions, and based on the determination result, target test data satisfying all the preset conditions is screened out from the stable test data.

[0130] In the embodiments of the present application, the preset conditions can include but are not limited to no coal outage data, left and right side coal amount difference and total coal amount ratio less than a first preset value, in-furnace desulfurizer feeding amount fluctuation value less than a second preset value, and satisfying the calibration data range corresponding to the test data.

[0131] In this step, the first preset value is generally set to 5%, and the second preset value is generally set to 30%. The present application does not limit the ratio set according to the technical SCNR process requirements.

[0132] In one embodiment of the present application, in specific implementation, step S103 can include:

[0133] In this step, for each set of test data in the stable test data, it is determined whether the set of test data satisfies at least one of the multiple preset conditions to obtain a second determination result.

[0134] In this step, it is determined whether each set of test data satisfies at least one of the multiple preset conditions to obtain a second determination result.

[0135] In this step, for each set of test data in the stable test data, it is determined whether the set of test data satisfies at least one of the multiple preset conditions to obtain a second determination result.

[0136] In this step, when the set of test data does not satisfy all the preset conditions, the set of test data is determined as invalid candidate test data, and the invalid candidate test data is stored in a preset invalid stable database (secondary database 0, DL110); when the set of test data satisfies at least one of the preset conditions and does not satisfy all the preset conditions, the set of test data is determined as general candidate test data, and the general candidate test data is stored in a preset general stable database (secondary database 1 / 2 / 3, DL111 / 2 / 3).

[0137] Here, since the data characteristics of the invalid alternative test data and the general alternative test data are weak, the preset neural network mathematical model can be used to train the alternative test data to supplement the analysis results of the alternative test data.

[0138] S1033、When the second judgment result is that the group of test data meets all the preset conditions, the group of test data is determined as target test data.

[0139] In this step, when the group of test data meets all the preset conditions, the group of test data is determined as target test data, and the target test data is stored in a preset target database (secondary database 4, DLII 4).

[0140] Here, since the data characteristics of the target test data are strong, the data characteristics are excellent in data stability and data effectiveness, the target test data can be analyzed to determine the target denitration reductant flow rate ratio value corresponding to each target denitration lance under the target denitration efficiency corresponding to multiple load values.

[0141] S104, based on the target test data, determining the target denitration reductant flow rate ratio value corresponding to each target denitration lance under the target denitration efficiency corresponding to multiple load values.

[0142] In this step, for multiple groups of test data in the target test data, the multiple denitration efficiencies corresponding to each target denitration lance under each load value are determined, and the maximum denitration efficiency is determined among the multiple denitration efficiencies to obtain the target denitration efficiency under multiple load values, and then the target denitration reductant flow rate ratio value corresponding to each target denitration lance under the target denitration efficiency corresponding to multiple load values is determined.

[0143] In this way, the SNCR denitration test method provided by the embodiment of the present application can obtain the target denitration reductant flow rate ratio value corresponding to each target denitration lance under the target denitration efficiency corresponding to multiple load values, and then when the SNCR denitration process is performed on the circulating fluidized bed boiler, the determined target denitration reductant flow rate ratio value and the corresponding combination of target denitration lances are used to improve the effect of SNCR denitration and improve the denitration efficiency, thereby improving the stability of the SNCR denitration of the circulating fluidized bed boiler.

[0144] The SNCR denitration test method provided by the embodiment of the present application determines target denitration lances based on the temperature average in the denitration lances arranged at multiple region positions in the circulating fluidized bed boiler, controls the target denitration lances to perform SNCR denitration tests for at least one test cycle by using multiple sets of test working condition parameters, fully acquires test data under each set of test working condition parameters by using data acquisition devices arranged at multiple detection positions, performs condition screening on the test data, obtains target test data with stronger characteristics, determines the target denitration reducing agent flow rate proportion value corresponding to each target denitration lance under the target denitration efficiency corresponding to multiple load values, improves the SNCR denitration effect and increases the denitration efficiency, and further improves the stability of the circulating fluidized bed boiler in different working conditions.

[0145] Please refer to Figure 4 , Figure 4 The structure schematic diagram of the SNCR denitration test device provided by the embodiment of the present application is shown in FIG. 4. Figure 4 The SNCR denitration test device 400 includes:

[0146] The lance determination module 410 is configured to determine multiple target denitration lances in the denitration lances based on the temperature average corresponding to the separator inlet of the circulating fluidized bed boiler acquired.

[0147] The denitration test module 420 is configured to control the target denitration lances to perform SNCR denitration tests for at least one test cycle according to each set of test working condition parameters in a cycle based on multiple sets of preset test working condition parameters, until the duration of the SNCR denitration test is greater than a preset time threshold, and acquire test data corresponding to each test cycle under each set of test working condition parameters by using a data acquisition device; wherein the test working condition parameters include a denitration reducing agent flow rate proportion value corresponding to each target denitration lance.

[0148] The data screening module 430 is configured to respectively determine whether each set of test data in the stable test data satisfies at least one of multiple preset conditions, and screen target test data satisfying all the preset conditions from the stable test data based on the determination result.

[0149] The data analysis module 440 is configured to determine a target denitration reducing agent flow rate proportion value corresponding to each target denitration lance under a target denitration efficiency corresponding to multiple load values based on the target test data.

[0150] Further, the region positions of the circulating fluidized bed boiler include a separator inlet, a separator outlet, a dense phase zone, a dilute phase zone, and an air chamber; the lance determination module 410 is configured to:

[0151] acquire the temperature mean value corresponding to the separator inlet of the circulating fluidized bed boiler, and determine whether the temperature mean value is greater than a preset temperature threshold value;

[0152] if the temperature mean value is greater than the preset temperature threshold value, the denitration lances corresponding to the separator inlet and the separator outlet are determined as target denitration lances;

[0153] if the temperature mean value is less than or equal to the preset temperature threshold value, the denitration lance corresponding to the separator outlet is determined as a target denitration lance, and one target denitration lance is determined from the denitration lances corresponding to the dense phase zone, the dilute phase zone, and the air chamber.

[0154] Further, the denitration test module 420 is configured to:

[0155] for each of the preset multiple sets of test working condition parameters, in each test cycle, control the target denitration lance to perform SNCR denitration test under the test working condition parameter in the test cycle, and acquire test data corresponding to the test cycle under the test working condition parameter by using the data acquisition device;

[0156] based on multiple load values included in the test data, calculate a target load fluctuation rate corresponding to the test cycle, and determine whether the target load fluctuation rate is less than a preset fluctuation rate threshold value to obtain a first determination result;

[0157] based on the first determination result, determine the test data corresponding to the test cycle under the test working condition parameter as stable test data or fluctuation test data, and perform SNCR denitration test in the next test cycle according to the next set of test working condition parameters or the test working condition parameter;

[0158] The SNCR denitration test under at least one test cycle of each of the plurality of sets of test working condition parameters is cyclically performed until a duration of the SNCR denitration test is greater than a preset time threshold, and stable test data and fluctuation test data corresponding to each of the test cycle under each of the test working condition parameters are obtained.

[0159] Further, when the SNCR denitration test module 420 is used to determine the test data corresponding to the test cycle under the set of test working condition parameters as stable test data or fluctuation test data based on the first judgment result, and perform the SNCR denitration test of the next test cycle according to the next set of test working condition parameters or the set of test working condition parameters, the SNCR denitration test module 420 is used to:

[0160] when the first judgment result is that the target load fluctuation rate is less than the preset fluctuation rate threshold, the test data corresponding to the test cycle under the set of test working condition parameters is determined as stable test data, and the SNCR denitration test of the next test cycle is performed according to the next set of test working condition parameters;

[0161] when the first judgment result is that the target load fluctuation rate is greater than or equal to the preset fluctuation rate threshold, the test data corresponding to the test cycle under the set of test working condition parameters is determined as fluctuation test data, and the SNCR denitration test of the next test cycle is performed according to the set of test working condition parameters.

[0162] Further, the test data at least includes a load value and a flue gas flow of the circulating fluidized bed boiler, a nitrogen oxide concentration value corresponding to each of the detection positions, and an ammonia molecule molar number corresponding to each of the target denitration injection lances.

[0163] Further, the test data further includes a denitration efficiency and an ammonia-nitrogen molar ratio value corresponding to each of the target denitration injection lances; when the SNCR denitration test module 420 is used to obtain the denitration efficiency and the ammonia-nitrogen molar ratio value, the SNCR denitration test module 420 is used to:

[0164] based on the nitrogen oxide concentration value, the denitration efficiency corresponding to each of the target denitration injection lances is determined and obtained by using a preset efficiency calculation formula;

[0165] based on the nitrogen oxide concentration value, the ammonia molecule molar number and the flue gas flow, the ammonia-nitrogen molar ratio value corresponding to each of the target denitration injection lances is determined and obtained by using a preset molar number calculation formula.

[0166] Further, the data screening module 430 is configured to:

[0167] for each group of test data in the stable test data, respectively determine whether the group of test data satisfies at least one of the plurality of preset conditions, to obtain a second determination result;

[0168] when the second determination result is that the group of test data does not satisfy all the preset conditions, the group of test data is determined as the candidate test data;

[0169] when the second determination result is that the group of test data satisfies all the preset conditions, the group of test data is determined as the target test data.

[0170] The SNCR denitration test device provided by the embodiment of the present application determines the target denitration lance based on the average temperature of the denitration lance arranged at multiple region positions in the circulating fluidized bed boiler, controls the target denitration lance to perform the SNCR denitration test of at least one test cycle by using multiple groups of test working condition parameters, fully acquires the test data under each group of test working condition parameters by using the data acquisition equipment arranged at multiple detection positions, performs condition screening on the test data, obtains the target test data with strong characteristics, determines the target denitration reducing agent flow rate proportion value corresponding to each target denitration lance under the target denitration efficiency corresponding to multiple load values, improves the effect of SNCR denitration and improves the denitration efficiency, and further improves the stability of the circulating fluidized bed boiler in different working conditions.

[0171] Please refer to Figure 5 , Figure 5 The structure of the electronic device provided by the embodiment of the present application is shown in FIG. 5. Figure 5 As shown in FIG. 5, the electronic device 500 includes a processor 510, a memory 520 and a bus 530.

[0172] The memory 520 stores machine readable instructions executable by the processor 510. When the electronic device 500 is running, the processor 510 communicates with the memory 520 through the bus 530. The machine readable instructions are executed by the processor 510, and can execute the steps of the SNCR denitration test method in the method embodiment shown in the above Figure 2 The specific implementation can be referred to the method embodiment, which will not be described here.

[0173] The embodiment of the present application further provides a computer readable storage medium, and the computer readable storage medium stores a computer program. When the computer program is run by a processor, the computer program can execute the method as described above. Figure 2 The step of the SNCR denitration test method in the method embodiment is not repeated here, and the specific implementation can be referred to the method embodiment.

[0174] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0175] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented by other ways. The device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and another division mode can be used in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some communication interfaces, devices or units, and can be electrical, mechanical or other forms.

[0176] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0177] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0178] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a nonvolatile computer readable storage medium executable by a processor. Based on this understanding, the technical solutions of the present application essentially or the part of the prior art that contributes to the present application or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0179] Finally, it should be noted that: the above-described embodiments are only specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily think of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed by the present application, or make equivalent replacements to some of the technical features. The modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A SNCR denitration test method characterized by, The method is applied to a circulating fluidized bed boiler; The circulating fluidized bed boiler comprises a plurality of denitration spray guns respectively arranged at a plurality of region positions and a plurality of data acquisition devices respectively arranged at a plurality of detection positions, and the method comprises: determining a plurality of target denitration spray guns in the denitration spray guns based on a temperature mean value corresponding to a separator inlet of the circulating fluidized bed boiler acquired; controlling the target denitration spray guns to perform SNCR denitration tests for at least one test cycle according to each set of test working condition parameters based on a plurality of sets of preset test working condition parameters, until a duration of the SNCR denitration test is greater than a preset time threshold, and acquiring test data corresponding to each test cycle under each set of test working condition parameters by using the data acquisition device; wherein the test working condition parameters comprise a denitration reducing agent flow rate proportion value corresponding to each target denitration spray gun; for stable test data in the test data, respectively judging whether each set of test data in the stable test data satisfies at least one of a plurality of preset conditions, and based on a judgment result, screening target test data satisfying all the preset conditions from the stable test data; based on the target test data, determining a target denitration reducing agent flow rate proportion value corresponding to each target denitration spray gun under a target denitration efficiency corresponding to a plurality of load values.

2. The method of claim 1, wherein, The region positions comprise a separator inlet, a separator outlet, a dense phase zone, a dilute phase zone and a wind chamber; and determining a plurality of target denitration spray guns in the denitration spray guns based on a temperature mean value corresponding to a separator inlet of the circulating fluidized bed boiler acquired comprises: acquiring the temperature mean value corresponding to the separator inlet of the circulating fluidized bed boiler acquired, and judging whether the temperature mean value is greater than a preset temperature threshold; if the temperature mean value is greater than the preset temperature threshold, determining the denitration spray guns corresponding to the separator inlet and the separator outlet as target denitration spray guns; if the temperature mean value is less than or equal to the preset temperature threshold, determining the denitration spray gun corresponding to the separator outlet as a target denitration spray gun, and determining one target denitration spray gun in the denitration spray guns corresponding to the dense phase zone, the dilute phase zone and the wind chamber respectively.

3. The method of claim 1, wherein, The method comprises: for each set of test working condition parameters in the plurality of sets of preset test working condition parameters, controlling the target denitration spray guns to perform SNCR denitration tests in each test cycle according to the test working condition parameters in the test cycle, and acquiring test data corresponding to the test cycle under the set of test working condition parameters by using the data acquisition device; based on a plurality of load values included in the test data, calculating a target load fluctuation rate corresponding to the test cycle, and judging whether the target load fluctuation rate is less than a preset fluctuation rate threshold to obtain a first judgment result; determine, based on the first judgment result, the test data corresponding to the test period under the set of test operating parameters as stable test data or fluctuation test data, and perform the SNCR denitration test of the next test period according to the next set of test operating parameters or the set of test operating parameters; perform the SNCR denitration test of at least one test period under the multiple sets of test operating parameters in a cycle until the duration of the SNCR denitration test is greater than a preset time threshold, and obtain the stable test data and the fluctuation test data corresponding to each test period under each set of test operating parameters.

4. The method of claim 3, wherein, The method comprises the following steps: when the first judgment result is that the target load fluctuation rate is less than a preset fluctuation rate threshold, the test data corresponding to the test period under the set of test operating parameters is determined as stable test data, and the SNCR denitration test of the next test period is performed according to the next set of test operating parameters; when the first judgment result is that the target load fluctuation rate is greater than or equal to a preset fluctuation rate threshold, the test data corresponding to the test period under the set of test operating parameters is determined as fluctuation test data, and the SNCR denitration test of the next test period is performed according to the set of test operating parameters.

5. The method of claim 1, wherein, The test data at least comprises the load value and the flue gas flow of the circulating fluidized bed boiler, the nitrogen oxide concentration value corresponding to each detection position, and the ammonia molecule molar number corresponding to each target denitration lance.

6. The method of claim 5, wherein, The test data further comprises the denitration efficiency and the ammonia-nitrogen molar ratio value corresponding to each target denitration lance. The denitration efficiency and the ammonia-nitrogen molar ratio value are obtained by the following steps: based on the nitrogen oxide concentration value, the denitration efficiency corresponding to each target denitration lance is determined and obtained by using a preset efficiency calculation formula; based on the nitrogen oxide concentration value, the ammonia molecule molar number and the flue gas flow, the ammonia-nitrogen molar ratio value corresponding to each target denitration lance is determined and obtained by using a preset molar number calculation formula.

7. The method of claim 1, wherein, The method comprises the following steps: for each set of test data in the stable test data, it is respectively judged whether the set of test data satisfies at least one of the multiple preset conditions, and a second judgment result is obtained; when the second judgment result is that the set of test data does not satisfy all the preset conditions, the set of test data is determined as alternative test data; when the second judgment result is that the set of test data satisfies all the preset conditions, the set of test data is determined as target test data.

8. A SNCR denitration test device characterized by, The device comprises: The spray gun determination module is configured to determine a plurality of target denitration spray guns based on the average temperature of the separator inlet of the circulating fluidized bed boiler. The denitration test module is configured to control the target denitration spray guns to perform SNCR denitration tests according to each set of test working condition parameters for at least one test cycle until the duration of the SNCR denitration test is greater than a preset time threshold, and to obtain test data corresponding to each test cycle under each set of test working condition parameters by using a data acquisition device, wherein the test working condition parameters include a denitration reducing agent flow rate ratio value corresponding to each target denitration spray gun. The data screening module is configured to determine whether each set of test data in the stable test data satisfies at least one of a plurality of preset conditions, and to screen target test data that satisfies all the preset conditions from the stable test data based on the determination result. The data analysis module is configured to determine a target denitration reducing agent flow rate ratio value corresponding to each target denitration spray gun under a target denitration efficiency corresponding to a plurality of load values based on the target test data.

9. An electronic device, comprising: The processor, the memory, and the bus, the memory stores machine readable instructions executable by the processor, when the electronic device is running, the processor and the memory communicate through the bus, the machine readable instructions are executed by the processor to perform the steps of the SNCR denitration test method according to any one of claims 1 to 7. The computer readable storage medium stores a computer program, and the computer program is executed by the processor to perform the steps of the SNCR denitration test method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, ​

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