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

Abstract

The invention provides an SNCR denitration test method and device, electronic equipment and a storage medium, and the method comprises the steps: determining a plurality of target denitration spray guns based on a temperature mean value of a separator inlet of a circulating fluidized bed boiler; controlling the target denitration spray guns to perform SNCR denitration test according to each group of test working condition parameters including the denitration reducing agent flow proportion value corresponding to each target denitration spray gun, and acquiring test data of each test period under each group of test working condition parameters; whether the stability test data meet at least one of multiple preset conditions or not is judged, and target test data meeting all the preset conditions are screened out from the stability test data so as to determine the target denitration reducing agent flow proportion value corresponding to each target denitration spray gun under the target denitration efficiency corresponding to the multiple load values. Through the method, the SNCR denitration effect and stability 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 a SNCR denitration test method, device, electronic equipment and storage medium. Background Art

[0002] When controlling the emission of pollutants from circulating fluidized bed boilers, due to increasingly stringent environmental protection requirements and the current operating conditions such as large fuel fluctuations, frequent load changes, and increased low-load time, it is difficult to control nitrogen oxides and the economic cost is high. The SNCR denitrification process is generally used in the denitrification process of circulating fluidized bed boilers.

[0003] At present, in the technology for treating nitrogen oxides generated by circulating fluidized bed boilers, the SNCR denitrification process mainly improves the denitrification efficiency by increasing the number of spray guns or modifying the spray gun structure. The effect of this improvement method is poor, and due to the uncertainty of the denitrification effect, its applicability to different circulating fluidized bed units is poor; in addition, since the combination of spray guns in various positions under different operating conditions is not clear enough, the consumption of denitrification reducing agent is relatively high, which reduces the stability of SNCR denitrification. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide an SNCR denitrification test method, device, electronic equipment and storage medium, by determining the target denitrification spray gun based on the temperature mean among the denitrification spray guns set at multiple regional positions in a circulating fluidized bed boiler, and using multiple groups of test operating conditions parameters to control the target denitrification spray gun to carry out at least one test cycle of SNCR denitrification test, so as to fully obtain the test data under each group of test operating conditions parameters by using data acquisition equipment set at multiple detection positions, and then conditionally screen the test data to obtain target test data with strong characteristics, so as to determine the target denitrification reductant flow ratio value corresponding to each target denitrification spray gun under the target denitrification efficiency corresponding to multiple load values, thereby improving the denitrification efficiency and further improving the stability of the circulating fluidized bed boiler under different operating conditions of SNCR denitrification.

[0005] The present application provides an SNCR denitration test method, which is applied to a circulating fluidized bed boiler; the circulating fluidized bed boiler includes a denitration spray gun respectively arranged at a plurality of regional positions and a data acquisition device respectively arranged at a plurality of detection positions, and the method includes:

[0006] Based on the collected temperature average corresponding to the separator inlet of the circulating fluidized bed boiler, a plurality of target denitrification spray guns are determined among the denitrification spray guns;

[0007] Based on a plurality of preset test condition parameters, the target denitration spray gun is controlled to perform at least one test cycle of the SNCR denitration test according to each set of the test condition parameters, until the duration of the SNCR denitration test is greater than a preset time threshold, and the test data corresponding to each test cycle under each set of the test condition parameters are obtained by using the data acquisition device; wherein the test condition parameters include a denitration reducing agent flow ratio value corresponding to each of the target denitration spray guns;

[0008] For the stable test data in the test data, respectively judging whether each group of test data in the stable test data satisfies at least one of a plurality of preset conditions, and based on the judgment result, screening out target test data that satisfies all of the preset conditions from the stable test data;

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

[0010] Further, the regional position includes a separator inlet, a separator outlet, a dense phase area, a dilute phase area and a wind chamber; based on the collected temperature mean corresponding to the separator inlet of the circulating fluidized bed boiler, a plurality of target denitrification spray guns are determined in the denitrification spray guns, including:

[0011] Obtaining the collected temperature average corresponding to the separator inlet of the circulating fluidized bed boiler, and determining whether the temperature average is greater than a preset temperature threshold;

[0012] If the temperature average is greater than a preset temperature threshold, the denitrification spray guns corresponding to the separator inlet and the separator outlet are respectively determined as target denitrification spray guns;

[0013] If the temperature average is less than or equal to the preset temperature threshold, the denitrification spray gun corresponding to the separator outlet is determined as the target denitrification spray gun, and a target denitrification spray gun is determined among the denitrification spray guns corresponding to the dense phase zone, the dilute phase zone and the wind chamber respectively.

[0014] Furthermore, based on the preset multiple groups of test condition parameters, the target denitrification spray gun is controlled to cycle at least one test cycle of the SNCR denitrification test according to each group of the test condition parameters until the duration of the SNCR denitrification test is greater than a preset time threshold, and the test data corresponding to each test cycle under each group of the test condition parameters is obtained by using the data acquisition device, including:

[0015] For each set of test condition parameters in the preset multiple sets of test condition parameters, in each test cycle, the target denitration spray gun is controlled to perform the SNCR denitration test in the test cycle according to the test condition parameters, and the test data corresponding to the test cycle under the set of test condition parameters is obtained by using the data acquisition device;

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

[0017] Based on the first judgment result, the test data corresponding to the test cycle under the set of test operating parameters is determined as stable test data or fluctuating test data, and the SNCR denitration test of the next test cycle is performed according to the next set of test operating parameters or the set of test operating parameters;

[0018] The SNCR denitrification test of at least one test cycle under the multiple groups of test operating parameters is cyclically performed until the duration of the SNCR denitrification test is greater than a preset time threshold, and stable test data and fluctuating test data corresponding to each of the test cycles under each group of the test operating parameters are obtained.

[0019] Further, based on the first judgment result, the test data corresponding to the test cycle under the group of test operating parameters is determined as stable test data or fluctuating test data, and the SNCR denitrification test of the next test cycle is performed according to the next group of test operating parameters or the group of test operating parameters, including:

[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 cycle under the set of test operating 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 operating 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 cycle under the set of test operating parameters is determined as fluctuation test data, and the SNCR denitrification test of the next test cycle is carried out according to the set of test operating parameters.

[0022] Furthermore, the test data at least includes the load value and flue gas flow rate of the circulating fluidized bed boiler, the nitrogen oxide concentration value corresponding to each of the detection positions, and the molar number of ammonia molecules corresponding to each of the target denitrification spray guns.

[0023] Furthermore, the test data also includes the denitration efficiency and the ammonia nitrogen molar ratio corresponding to each of the target denitration spray guns; 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 spray guns;

[0025] Based on the nitrogen oxide concentration value, the molar number of ammonia molecules and the flue gas flow rate, a preset molar number calculation formula is used to determine and obtain the ammonia nitrogen molar ratio corresponding to each of the target denitrification spray guns.

[0026] Further, the respectively judging whether each group of test data in the stable test data satisfies at least one of a plurality of preset conditions, and based on the judging result, screening out target test data satisfying all the preset conditions in the stable test data, comprises:

[0027] For each group of test data in the stable test data, determine whether the group of test data meets at least one of a plurality of preset conditions to obtain a second determination result;

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

[0029] 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 the target test data.

[0030] The present application also provides a SNCR denitration test device, which includes:

[0031] A spray gun determination module, used to determine a plurality of target denitrification spray guns among the denitrification spray guns based on the collected temperature average corresponding to the separator inlet of the circulating fluidized bed boiler;

[0032] A denitration test module, for controlling the target denitration spray gun to perform at least one test cycle of the SNCR denitration test according to each set of the test condition parameters based on a plurality of preset test condition parameters, until the duration of the SNCR denitration test is greater than a preset time threshold, and using a data acquisition device to obtain test data corresponding to each test cycle under each set of the test condition parameters; wherein the test condition parameters include a denitration reducing agent flow ratio value corresponding to each of the target denitration spray guns;

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

[0034] The data analysis module is used to determine the target denitration reducing agent flow ratio value corresponding to each of the target denitration spray guns at the target denitration efficiency corresponding to multiple load values ​​based on the target test data.

[0035] Further, the regional position of the circulating fluidized bed boiler includes a separator inlet, a separator outlet, a dense phase area, a dilute phase area and a wind chamber; when the spray gun determination module is used to determine multiple target denitrification spray guns among the denitrification spray guns based on the collected temperature average corresponding to the separator inlet of the circulating fluidized bed boiler, the spray gun determination module is used to:

[0036] Obtaining the collected temperature average corresponding to the separator inlet of the circulating fluidized bed boiler, and determining whether the temperature average is greater than a preset temperature threshold;

[0037] If the temperature average is greater than a preset temperature threshold, the denitrification spray guns corresponding to the separator inlet and the separator outlet are respectively determined as target denitrification spray guns;

[0038] If the temperature average is less than or equal to the preset temperature threshold, the denitrification spray gun corresponding to the separator outlet is determined as the target denitrification spray gun, and a target denitrification spray gun is determined among the denitrification spray guns corresponding to the dense phase zone, the dilute phase zone and the wind chamber respectively.

[0039] Further, the denitration test module is used to control the target denitration spray gun to perform at least one test cycle of the SNCR denitration test according to each set of the test condition parameters based on a plurality of preset test condition parameters, until the duration of the SNCR denitration test is greater than a preset time threshold, and the test data corresponding to each test cycle under each set of the test condition parameters is obtained by using the data acquisition device. The denitration test module is used to:

[0040] For each set of test condition parameters in the preset multiple sets of test condition parameters, in each test cycle, the target denitration spray gun is controlled to perform the SNCR denitration test in the test cycle according to the test condition parameters, and the test data corresponding to the test cycle under the set of test condition parameters is obtained by using the data acquisition device;

[0041] Based on the multiple load values ​​included in the test data, calculate the target load fluctuation rate corresponding to the test period, and determine whether the target load fluctuation rate is less than a preset fluctuation rate threshold to obtain a first determination result;

[0042] Based on the first judgment result, the test data corresponding to the test cycle under the set of test operating parameters is determined as stable test data or fluctuating test data, and the SNCR denitration test of the next test cycle is performed according to the next set of test operating parameters or the set of test operating parameters;

[0043] The SNCR denitrification test of at least one test cycle under the multiple groups of test operating parameters is cyclically performed until the duration of the SNCR denitrification test is greater than a preset time threshold, and stable test data and fluctuating test data corresponding to each of the test cycles under each group of the test operating parameters are obtained.

[0044] Further, when the denitration test module is used to determine the test data corresponding to the test cycle under the set of test operating parameters as stable test data or fluctuating test data based on the first judgment result, and to perform the SNCR denitration test of the next test cycle 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 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 operating 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 operating condition parameters;

[0046] 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 operating parameters is determined as fluctuation test data, and the SNCR denitrification test of the next test cycle is carried out according to the set of test operating parameters.

[0047] Furthermore, the test data at least includes the load value and flue gas flow rate of the circulating fluidized bed boiler, the nitrogen oxide concentration value corresponding to each of the detection positions, and the molar number of ammonia molecules corresponding to each of the target denitrification spray guns.

[0048] Furthermore, the test data also includes the denitration efficiency and the ammonia nitrogen molar ratio corresponding to each of the target denitration spray guns; when the denitration test module is used to obtain the denitration efficiency and the ammonia nitrogen molar ratio, the denitration test module is used to:

[0049] 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 spray guns;

[0050] Based on the nitrogen oxide concentration value, the molar number of ammonia molecules and the flue gas flow rate, a preset molar number calculation formula is used to determine and obtain the ammonia nitrogen molar ratio corresponding to each of the target denitrification spray guns.

[0051] Further, when the data screening module is used to respectively determine whether each group of test data in the stability test data satisfies at least one of a plurality of preset conditions, and based on the determination result, screens out target test data that satisfies all of the preset conditions in the stability test data, the data screening module is used to:

[0052] For each group of test data in the stable test data, determine whether the group of test data meets at least one of a plurality of preset conditions to obtain a second determination result;

[0053] When the second judgment result is that the group of test data does not meet all of the preset conditions, the group of test data is determined as candidate test data;

[0054] 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 the target test data.

[0055] An embodiment of the present application also provides an electronic device, including: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate through the bus, and when the machine-readable instructions are executed by the processor, the steps of the SNCR denitrification test method as described above are performed.

[0056] An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the SNCR denitrification test method described above are executed.

[0057] The SNCR denitrification test method, device, electronic device and storage medium provided in the embodiment of the present application are applied to a circulating fluidized bed boiler; the circulating fluidized bed boiler comprises denitrification spray guns respectively arranged at multiple regional positions and data acquisition equipment respectively arranged at multiple detection positions, and the method comprises: based on the collected temperature average corresponding to the separator inlet of the circulating fluidized bed boiler, determining multiple target denitrification spray guns among the denitrification spray guns; based on multiple groups of preset test operating condition parameters, controlling the target denitrification spray guns to cycle at least one test cycle of the SNCR denitrification test according to each group of the test operating condition parameters until the duration of the SNCR denitrification test is greater than the preset time Threshold, and use the data acquisition equipment to obtain the test data corresponding to each of the test cycles under each group of the test operating condition parameters; wherein the test operating condition parameters include the denitration reducing agent flow ratio value corresponding to each of the target denitration spray guns; for the stable test data in the test data, respectively judge whether each group of test data in the stable test data meets at least one of a plurality of preset conditions, and based on the judgment result, screen out the target test data that meets all of the preset conditions in the stable test data; based on the target test data, determine the target denitration reducing agent flow ratio value corresponding to each of the target denitration spray guns under the target denitration efficiency corresponding to a plurality of load values.

[0058] Compared with the methods of improving nitrogen oxides by increasing the number of spray guns or modifying the spray gun structure in the prior art, the target denitrification spray gun is determined based on the temperature mean among the denitrification spray guns set at multiple regional positions in the circulating fluidized bed boiler, and multiple groups of test operating conditions parameters are used to control the target denitrification spray gun to carry out at least one test cycle of SNCR denitrification test, so as to fully obtain the test data under each group of test operating conditions parameters by using data acquisition equipment set at multiple detection positions, and then conditionally screen the test data to obtain target test data with stronger characteristics, so as to determine the target denitrification reductant flow ratio value corresponding to each target denitrification spray gun under the target denitrification efficiency corresponding to multiple load values, thereby improving the denitrification efficiency and improving the stability of SNCR denitrification under different operating conditions of the circulating fluidized bed boiler.

[0059] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

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

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

[0063] Figure 3 A schematic diagram of a SNCR denitrification device provided in an embodiment of the present application;

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

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

[0066] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the 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 of the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, each other embodiment obtained by those skilled in the art without making creative work belongs to the scope of protection of the present application.

[0067] Research has found that, at present, in the technology for treating nitrogen oxides generated by circulating fluidized bed boilers, the SNCR denitrification process mainly improves the denitrification efficiency by increasing the number of spray guns or modifying the spray gun structure. The effect of this improvement method is poor, and due to the uncertainty of the denitrification effect, its applicability to different circulating fluidized bed units is poor; in addition, due to the unclear combination of spray guns at various positions under different operating conditions, the consumption of denitrification reducing agent is relatively high, which reduces the stability of SNCR denitrification.

[0068] Based on this, an embodiment of the present application provides an SNCR denitrification test method, by determining a target denitrification spray gun based on the temperature mean among the denitrification spray guns set at multiple regional positions in a circulating fluidized bed boiler, and using multiple groups of test operating condition parameters to control the target denitrification spray gun to perform at least one test cycle of SNCR denitrification test, so as to fully obtain the test data under each group of test operating condition parameters by using data acquisition equipment set at multiple detection positions, and then conditionally screen the test data to obtain target test data with strong characteristics, so as to determine the target denitrification reductant flow ratio value corresponding to each target denitrification spray gun under the target denitrification efficiency corresponding to multiple load values, thereby improving the SNCR denitrification effect and the denitrification efficiency, and thereby improving the stability of the circulating fluidized bed boiler under different operating conditions of SNCR denitrification.

[0069] See also Figure 1 , Figure 1 This is a schematic diagram of the configuration of a circulating fluidized bed boiler provided in an embodiment of the present application. Figure 1 As shown in , the SNCR denitrification test method provided in the embodiment of the present application is generally applied to a circulating fluidized bed boiler, wherein the circulating fluidized bed boiler comprises denitrification spray guns respectively arranged at multiple regional positions and data acquisition equipment respectively arranged at multiple detection positions.

[0070] It should be noted that the circulating fluidized bed boiler (CFB boiler) is a highly efficient combustion equipment that achieves more complete combustion and lower emissions by keeping solid fuel particles suspended in the furnace for combustion. When the circulating fluidized bed boiler is supplied with air, the primary air enters from the bottom to provide sufficient oxygen to support fuel combustion. The secondary air is supplemented in time as needed to optimize the combustion process. When the speed of the primary air exceeds a certain threshold, it will suspend the fuel particles and form a "boiling" fluidized bed. In this state, the fuel is more fully in contact with oxygen, which improves the combustion efficiency.

[0071] Here, SNCR denitrification is a denitrification technology called Selective Non-Catalytic Reduction, which is used to reduce nitrogen oxide (NOx) emissions generated during the combustion process. During the SNCR denitrification process, nitrogen-containing compounds such as ammonia (NH3) or urea are sprayed into a furnace at a certain temperature range to react with nitrogen oxides (NOx) to generate nitrogen (N2) and water (H2O) without the use of a catalyst. This reaction occurs without a catalyst, so it is called non-catalytic reduction.

[0072] In the embodiments of the present application, Figure 1As shown in, the multiple area positions of the circulating fluidized bed boiler may include a separator inlet (position 1), a separator outlet (position 2), a dense phase zone (position 3), a dilute phase zone (position 4) and a wind chamber (position 5); the multiple detection positions of the circulating fluidized bed boiler may include a separator inlet (measuring point 1), a separator outlet (measuring point 2) and an economizer inlet (measuring point 3).

[0073] Among them, in the engineering application of circulating fluidized bed boilers, denitrification spray guns are generally not installed at all positions at the same time. Usually, under the SNCR denitrification process, a denitrification spray gun is only installed at the separator inlet (position 1); when the removal of nitrogen oxides cannot meet the emission requirements, a denitrification spray gun will be installed at the separator outlet (position 2); and when the circulating fluidized bed boiler is at low load or there are difficulties in denitrification during the startup stage, additional denitrification spray guns will be arranged in the furnace. Generally, based on the temperature of the separator inlet, a position is selected to set the denitrification spray gun in the dense phase zone (position 3), the dilute phase zone (position 4) and the wind chamber (position 5).

[0074] Here, since there are large differences in the flue gas parameters at the three measuring points, namely the separator inlet (measuring point 1), the separator outlet (measuring point 2) and the economizer inlet (measuring point 3), it is necessary to select the appropriate data acquisition method of the data acquisition equipment according to the matching of the actual position and the process requirements of SNCR denitrification to achieve stable and effective data acquisition. For example, the separator inlet (measuring point 1) generally adopts in-situ measurement, and the separator outlet (measuring point 2) and the economizer inlet (measuring point 3) generally adopt extraction measurement.

[0075] See also Figure 2 , Figure 2 This is a flow chart of a SNCR denitrification test method provided in the embodiment of the present application. Figure 2 As shown in , the SNCR denitration test method provided in the embodiment of the present application is generally applied to a circulating fluidized bed boiler, and the method comprises:

[0076] S101. Determine a plurality of target denitrification spray guns among the denitrification spray guns based on the collected temperature average corresponding to the separator inlet of the circulating fluidized bed boiler.

[0077] In the embodiment of the present application, the denitrification spray gun includes denitrification spray guns corresponding to the positions of the separator inlet, separator outlet, dense phase zone, dilute phase zone and wind chamber respectively.

[0078] In this step, the temperature average value collected at the separator inlet by the data acquisition equipment is compared with the preset temperature threshold value. While determining the denitrification spray gun corresponding to the separator outlet as the target denitrification spray gun, based on the comparison result of the temperature average value and the preset temperature threshold value, the denitrification spray gun corresponding to the separator inlet or the denitrification spray guns corresponding to the dense phase zone, the dilute phase zone and the wind chamber respectively are selected as the target denitrification spray gun.

[0079] In this way, based on the temperature mean corresponding to the separator inlet, the target denitrification spray gun is selected in the separator inlet, dense phase zone, dilute phase zone and wind chamber to meet the process requirements of SNCR denitrification at different temperatures.

[0080] In one implementation of the present application, during specific implementation, step S101 may include:

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

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

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

[0084] S1012: If the temperature average is greater than a preset temperature threshold, the denitrification spray guns corresponding to the separator inlet and the separator outlet are respectively determined as target denitrification spray guns.

[0085] In this step, when the temperature average at the separator inlet is greater than the preset temperature threshold, it indicates that the current working temperature is sufficient for the denitrification spray gun corresponding to the separator inlet to work, then the denitrification spray guns corresponding to the separator inlet and the separator outlet are respectively determined as the target denitrification spray guns.

[0086] S1013. If the temperature average is less than or equal to a preset temperature threshold, the denitrification spray gun corresponding to the separator outlet is determined as a target denitrification spray gun, and a target denitrification spray gun is determined from the denitrification spray guns corresponding to the dense phase zone, the dilute phase zone and the wind chamber respectively.

[0087] In this step, when the temperature average at the separator inlet is less than or equal to the preset temperature threshold, it indicates that the current operating temperature is difficult to meet the requirements for the denitrification spray gun corresponding to the separator inlet to work, and it is necessary to continue looking for a suitable spray gun at the front position, that is, to determine a target denitrification spray gun among the denitrification spray guns corresponding to the dense phase zone, the dilute phase zone and the wind chamber respectively; here, the selection of the denitrification spray guns corresponding to the dense phase zone, the dilute phase zone and the wind chamber can be specifically determined according to the actual temperature value of the temperature average.

[0088] S102. Based on a plurality of preset groups of test operating condition parameters, control the target denitrification spray gun to perform at least one test cycle of the SNCR denitrification test in accordance with each group of the test operating condition parameters, until the duration of the SNCR denitrification test is greater than a preset time threshold, and use the data acquisition device to obtain the test data corresponding to each of the test cycles under each group of the test operating condition parameters; wherein the test operating condition parameters include the denitrification reductant flow ratio value corresponding to each of the target denitrification spray guns.

[0089] See also Figure 3 , Figure 3 This is a schematic diagram of a SNCR denitrification device provided in an embodiment of the present application. Figure 3 As shown in , when the target denitrification spray gun is controlled to cycle for at least one test cycle of the SNCR denitrification test according to each set of test operating condition parameters, electric regulating valves A and B, as well as electromagnetic flowmeters A and B are installed in the corresponding pipelines of the dilution water tank and the denitrification reducing agent tank in the main main pipe, respectively, to accurately control the total flow of the main pipe; after the dilution water and the denitrification reducing agent flow into the mixer, the pressure transmitter A is installed to monitor the pressure of the main pipeline in real time to ensure the safety of the pipeline and the atomization pressure of the spray gun within the pressure limit; electric regulating valves and electromagnetic flowmeters are installed in the branch pipelines from the mixer to the denitrification spray guns at each regional position to accurately control the flow of each branch pipeline.

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

[0091] In the embodiment of the present application, among the preset multiple groups of test operating condition parameters, each group of test operating condition parameters includes a denitration reducing agent flow ratio value corresponding to each of the target denitration spray guns.

[0092] Exemplarily, when the target denitrification spray guns are the denitrification spray guns corresponding to the separator inlet and the separator outlet, respectively, an example of a preset multiple groups of test operating condition parameters is shown in the following table.

[0093]

[0094] In an embodiment of the present application, the test data at least includes the load value and flue gas flow rate of the circulating fluidized bed boiler, the nitrogen oxide concentration value corresponding to each of the detection positions, and the molar number of ammonia molecules corresponding to each of the target denitrification spray guns.

[0095] Furthermore, the test data may also include but are not limited to the coal feed rate of the circulating fluidized bed boiler, the primary air volume, the secondary air volume, the oxygen content of the air preheater inlet, the desulfurizer feed rate in the furnace, the bed temperature, the bed pressure, the furnace differential pressure, the separator inlet flue gas temperature, the separator outlet flue gas temperature, the denitrification reducing agent consumption, the denitrification dilution water consumption, the denitrification main pipe pressure, etc.

[0096] In one embodiment of the present application, in a specific implementation, the test data also includes the denitration efficiency and the ammonia nitrogen molar ratio corresponding to each of the target denitration spray guns, and the step of obtaining the denitration efficiency and the ammonia nitrogen molar ratio in step S102 may include:

[0097] S102A. 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 spray guns.

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

[0099] In an embodiment of the present application, when the target denitrification spray guns are the denitrification spray guns 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] Among them, η SA1 and η SA2 They represent the denitrification efficiency corresponding to the denitrification spray gun at the separator inlet (position 1) and the denitrification efficiency corresponding to the denitrification spray gun at the separator outlet (position 2); c(NOx) SAx Indicates the nitrogen oxide concentration value corresponding to each detection position, in mg / Nm 3 .

[0102] S102B, based on the nitrogen oxide concentration value, the molar number of ammonia molecules and the flue gas flow rate, a preset molar number calculation formula is used to determine and obtain the ammonia nitrogen molar ratio corresponding to each of the target denitrification spray guns.

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

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

[0105]

[0106] Among them, NSR A1 and NSR A2 They represent the denitration efficiency corresponding to the denitration lance at the separator inlet (position 1) and the molar ratio of ammonia nitrogen injected into the furnace by the denitration lance at the separator outlet (position 2), dimensionless; V Ay Indicates the flue gas flow rate of the circulating fluidized bed boiler; c(NOx) SAx Indicates the nitrogen oxide concentration value corresponding to each detection position, in mg / Nm 3 ; n(NH3) Ax Indicates the number of moles of ammonia molecules corresponding to each target denitrification spray gun, in mol.

[0107] In one implementation of the present application, during specific implementation, step S102 may include:

[0108] S1021. For each set of test operating condition parameters in the preset multiple sets of test operating condition parameters, in each test cycle, the target denitrification spray gun is controlled to perform the SNCR denitrification test under the test cycle according to the test operating condition parameters, and the test data corresponding to the test cycle under the set of test operating condition parameters is obtained by using the data acquisition equipment.

[0109] In this step, for each set of test condition parameters in the preset multiple sets of test condition parameters, the target denitrification spray gun is controlled to perform the SNCR denitrification test in each test cycle according to each set of test condition parameters. At the same time, the data acquisition equipment set at each detection position is used to obtain the test data corresponding to the test cycle under the set of test condition parameters.

[0110] In an embodiment of the present application, the target denitrification spray gun can be controlled to perform multiple SNCR denitrification tests according to the set of test operating parameters in each test cycle until the test time of the SNCR denitrification test reaches the time step corresponding to each test cycle.

[0111] Among them, the time step corresponding to each test cycle can be set to 60 minutes, or it can be set to other times according to the technical SCNR process requirements, and this application will not limit it here.

[0112] S1022. Based on the multiple load values ​​included in the test data, calculate the 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 to obtain a first determination result.

[0113] In this step, when controlling the target denitrification spray gun to perform multiple SNCR denitrification tests in the test cycle according to the set of test operating parameters, based on the load values ​​corresponding to the multiple SNCR denitrification tests included in the acquired test data, the difference between two adjacent load values ​​is calculated in the time sequence of obtaining the load values, that is, the load fluctuation rate is calculated to obtain multiple load fluctuation rates corresponding to the test cycle, and the load fluctuation rate with the largest value is determined among the multiple load fluctuation rates to obtain the target load fluctuation rate corresponding to the test cycle.

[0114] Further, the target load fluctuation rate is compared with a preset fluctuation rate threshold to determine whether the target load fluctuation rate is less than the preset fluctuation rate threshold, and a first determination result is obtained.

[0115] In the embodiments of the present application, the preset volatility threshold is generally set to 5%, and may also be set to other ratios according to the technical SCNR process requirements, which is not limited in the present application.

[0116] S1023. Based on the first judgment result, the test data corresponding to the test cycle under the set of test operating parameters is determined as stable test data or fluctuating test data, and the SNCR denitrification test of the next test cycle is performed according to the next set of test operating parameters or the set of test operating parameters.

[0117] In the embodiment of the present application, for stable test data, multiple groups of test data for each group of test conditions corresponding to different load values ​​in multiple load variation intervals can be obtained in the stable test data.

[0118] In one implementation of the present application, during specific implementation, step S1023 may 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 operating parameters is determined as stable test data, and the SNCR denitrification test of the next test cycle is carried out according to the next set of test operating parameters.

[0120] In this step, when the target load fluctuation rate is less than the preset fluctuation rate threshold, it can be determined that the data stability of this group of test data is relatively high, and the test data corresponding to this test cycle under this group of test operating parameters is determined as stable test data, and the SNCR denitrification test of the next test cycle is carried out according to the next group of test operating parameters.

[0121] Furthermore, the stability test data is stored in a preset stability database (primary database 1, DLI), and the stability database is used to store the stability test data.

[0122] Exemplarily, after controlling the target denitrification spray gun to perform multiple SNCR denitrification tests corresponding to the current test cycle according to the denitrification reducing agent flow ratio value corresponding to test condition 1, if the target load fluctuation rate of the current test cycle is less than the preset fluctuation rate threshold, the target denitrification spray gun is controlled to perform multiple SNCR denitrification tests corresponding to the next test cycle according to the denitrification reducing agent flow ratio value corresponding to test 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 cycle under the set of test operating parameters is determined as the fluctuation test data, and the SNCR denitrification test of the next test cycle is carried out according to the set of test operating parameters.

[0124] In this step, when the target load fluctuation rate is greater than or equal to the preset fluctuation rate threshold, it can be determined that the data stability of this group of test data is low, and the test data corresponding to this test cycle under this group of test operating parameters is determined as fluctuating test data, and the SNCR denitrification test of the next test cycle is carried out according to this group of test operating parameters.

[0125] Furthermore, the fluctuation test data is stored in a preset fluctuation database (level one database 2, DLⅡ), and the fluctuation database is used to store the fluctuation test data.

[0126] Exemplarily, after controlling the target denitrification spray gun to perform multiple SNCR denitrification tests corresponding to the current test cycle according to the denitrification reductant flow ratio value corresponding to test condition 1, if the target load fluctuation rate of the current test cycle is greater than or equal to the preset fluctuation rate threshold, the target denitrification spray gun is controlled to continue to perform multiple SNCR denitrification tests corresponding to the next test cycle according to the denitrification reductant flow ratio value corresponding to test condition 1.

[0127] S1024. Cycle the SNCR denitrification test of at least one test cycle under the multiple groups of test operating parameters until the duration of the SNCR denitrification test is greater than a preset time threshold, and obtain stable test data and fluctuating test data corresponding to each test cycle under each group of test operating parameters.

[0128] In this step, when the target denitrification spray gun is controlled to perform at least one test cycle of the SNCR denitrification test according to multiple groups of test operating parameters, it is determined whether the duration of the SNCR denitrification test is greater than the preset time threshold to ensure the integrity and reliability of the test data. When the duration of the SNCR denitrification test is greater than the preset time threshold, the SNCR denitrification test is terminated, and stable test data and fluctuating test data corresponding to each test cycle under each group of the test operating parameters are obtained.

[0129] S103, for the stable test data in the test data, respectively 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 the determination result, select target test data that satisfies all of the preset conditions from the stable test data.

[0130] In an embodiment of the present application, the preset conditions may include but are not limited to no coal outage data, the difference in coal quantity on the left and right sides and the proportion of the total coal quantity being less than a first preset value, the fluctuation value of the desulfurizer feed amount in the furnace being less than a second preset value, and satisfying the calibration data range corresponding to the test data.

[0131] Among them, the first preset value is generally set to 5%, and the second preset value is generally set to 30%. It can also be set as a ratio according to the technical SCNR process requirements, and this application will not limit it here.

[0132] In one implementation of the present application, during specific implementation, step S103 may include:

[0133] S1031. For each group of test data in the stable test data, determine whether the group of test data satisfies at least one of a plurality of 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 a plurality of preset conditions, and a second determination result is obtained.

[0135] S1032: When the second judgment result is that the group of test data does not satisfy all of the preset conditions, the group of test data is determined as candidate test data.

[0136] In this step, when the group of test data does not satisfy the preset conditions, the group of test data is determined as invalid alternative test data, and the invalid alternative test data is stored in the preset invalid stable database (secondary database 0, DLI0); when the group of test data satisfies at least one of the preset conditions and does not satisfy all of the preset conditions, the group of test data is determined as general alternative test data, and the general alternative test data is stored in the preset general stable database (secondary database 1 / 2 / 3, DLI1 / 2 / 3).

[0137] Here, since the data characteristics of the invalid alternative test data and the general alternative test data are relatively weak, a 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, DLI4).

[0140] Here, since the target test data has strong data characteristics and excellent data stability and data validity, the target test data can be analyzed to determine the target denitrification reductant flow ratio value corresponding to each target denitrification spray gun under the target denitrification efficiency corresponding to multiple load values.

[0141] S104. Based on the target test data, determine a target denitration reducing agent flow ratio value corresponding to each of the target denitration spray guns at a target denitration efficiency corresponding to a plurality of load values.

[0142] In this step, for multiple groups of test data in the target test data, multiple denitrification efficiencies corresponding to each target denitrification spray gun at each load value are determined, and the maximum denitrification efficiency is determined among the multiple denitrification efficiencies to obtain the target denitrification efficiencies at multiple load values, and then the target denitrification reductant flow ratio value corresponding to each of the target denitrification spray guns at the target denitrification efficiencies corresponding to the multiple load values ​​is determined.

[0143] In this way, through the SNCR denitrification test method provided in the embodiment of the present application, the target denitrification reductant flow ratio value corresponding to each target denitrification spray gun under the target denitrification efficiency corresponding to multiple load values ​​can be obtained, and then when the circulating fluidized bed boiler carries out the SNCR denitrification process, the corresponding combination of the determined target denitrification reductant flow ratio value and the target denitrification spray gun is used to improve the SNCR denitrification effect and the denitrification efficiency, thereby improving the stability of the circulating fluidized bed boiler in carrying out the SNCR denitrification.

[0144] The SNCR denitrification test method provided in the embodiment of the present application determines the target denitrification spray gun based on the temperature mean among the denitrification spray guns arranged at multiple regional positions in the circulating fluidized bed boiler, and uses multiple groups of test operating condition parameters to control the target denitrification spray gun to perform at least one test cycle of SNCR denitrification test, so as to fully obtain the test data under each group of test operating condition parameters by using the data acquisition equipment arranged at multiple detection positions, and then conditionally screen the test data to obtain target test data with strong characteristics, so as to determine the target denitrification reductant flow ratio value corresponding to each target denitrification spray gun under the target denitrification efficiency corresponding to multiple load values, thereby improving the SNCR denitrification effect and the denitrification efficiency, and further improving the stability of the circulating fluidized bed boiler under different operating conditions of SNCR denitrification.

[0145] See also Figure 4 , Figure 4 This is a schematic diagram of the structure of a SNCR denitration test device provided in an embodiment of the present application. Figure 4 As shown in , the SNCR denitration test device 400 includes:

[0146] The spray gun determination module 410 is used to determine a plurality of target denitrification spray guns among the denitrification spray guns based on the collected temperature average corresponding to the separator inlet of the circulating fluidized bed boiler;

[0147] The denitration test module 420 is used to control the target denitration spray gun to perform at least one test cycle of the SNCR denitration test according to each set of the test condition parameters based on a plurality of preset test 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 test cycle under each set of the test condition parameters by using a data acquisition device; wherein the test condition parameters include a denitration reducing agent flow ratio value corresponding to each of the target denitration spray guns;

[0148] A data screening module 430 is used to determine, for the 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, and based on the determination result, screen out target test data that satisfies all of the preset conditions in the stable test data;

[0149] The data analysis module 440 is used to determine, based on the target test data, a target denitration reducing agent flow ratio value corresponding to each of the target denitration spray guns at a target denitration efficiency corresponding to a plurality of load values.

[0150] Further, the regional position of the circulating fluidized bed boiler includes a separator inlet, a separator outlet, a dense phase area, a dilute phase area and a wind chamber; when the spray gun determination module 410 is used to determine multiple target denitrification spray guns among the denitrification spray guns based on the collected temperature average corresponding to the separator inlet of the circulating fluidized bed boiler, the spray gun determination module 410 is used to:

[0151] Obtaining the collected temperature average corresponding to the separator inlet of the circulating fluidized bed boiler, and determining whether the temperature average is greater than a preset temperature threshold;

[0152] If the temperature average is greater than a preset temperature threshold, the denitrification spray guns corresponding to the separator inlet and the separator outlet are respectively determined as target denitrification spray guns;

[0153] If the temperature average is less than or equal to the preset temperature threshold, the denitrification spray gun corresponding to the separator outlet is determined as the target denitrification spray gun, and a target denitrification spray gun is determined among the denitrification spray guns corresponding to the dense phase zone, the dilute phase zone and the wind chamber respectively.

[0154] Further, the denitration test module 420 is used to control the target denitration spray gun to perform at least one test cycle of the SNCR denitration test according to each set of the test condition parameters based on the preset multiple sets of test condition parameters, until the duration of the SNCR denitration test is greater than the preset time threshold, and the test data corresponding to each test cycle under each set of the test condition parameters is obtained by using the data acquisition device. The denitration test module 420 is used to:

[0155] For each set of test condition parameters in the preset multiple sets of test condition parameters, in each test cycle, the target denitration spray gun is controlled to perform the SNCR denitration test in the test cycle according to the test condition parameters, and the test data corresponding to the test cycle under the set of test condition parameters is obtained by using the data acquisition device;

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

[0157] Based on the first judgment result, the test data corresponding to the test cycle under the set of test operating parameters is determined as stable test data or fluctuating test data, and the SNCR denitration test of the next test cycle is performed according to the next set of test operating parameters or the set of test operating parameters;

[0158] The SNCR denitrification test of at least one test cycle under the multiple groups of test operating parameters is cyclically performed until the duration of the SNCR denitrification test is greater than a preset time threshold, and stable test data and fluctuating test data corresponding to each of the test cycles under each group of the test operating parameters are obtained.

[0159] Further, when the denitration test module 420 is used to determine the test data corresponding to the test cycle under the set of test operating parameters as stable test data or fluctuating test data based on the first judgment result, and to perform the SNCR denitration test of the next test cycle according to the next set of test operating parameters or the set of test operating parameters, the 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 operating 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 operating 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 operating parameters is determined as fluctuation test data, and the SNCR denitrification test of the next test cycle is carried out according to the set of test operating parameters.

[0162] Furthermore, the test data at least includes the load value and flue gas flow rate of the circulating fluidized bed boiler, the nitrogen oxide concentration value corresponding to each of the detection positions, and the molar number of ammonia molecules corresponding to each of the target denitrification spray guns.

[0163] Furthermore, the test data also includes the denitration efficiency and the ammonia nitrogen molar ratio corresponding to each of the target denitration spray guns; when the denitration test module 420 is used to obtain the denitration efficiency and the ammonia nitrogen molar ratio, the denitration test module 420 is used to:

[0164] 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 spray guns;

[0165] Based on the nitrogen oxide concentration value, the molar number of ammonia molecules and the flue gas flow rate, a preset molar number calculation formula is used to determine and obtain the ammonia nitrogen molar ratio corresponding to each of the target denitrification spray guns.

[0166] Furthermore, when the data screening module 430 is used to respectively determine whether each group of test data in the stability test data satisfies at least one of a plurality of preset conditions, and based on the determination result, screens out target test data that satisfies all of the preset conditions in the stability test data, the data screening module 430 is used to:

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

[0168] When the second judgment result is that the group of test data does not meet all of the preset conditions, the group of test data is determined as candidate test data;

[0169] 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 the target test data.

[0170] The SNCR denitrification test device provided in the embodiment of the present application determines the target denitrification spray gun based on the temperature mean among the denitrification spray guns arranged at multiple regional positions in the circulating fluidized bed boiler, and uses multiple groups of test operating condition parameters to control the target denitrification spray gun to perform at least one test cycle of SNCR denitrification test, so as to fully obtain the test data under each group of test operating condition parameters by using the data acquisition equipment arranged at multiple detection positions, and then conditionally screen the test data to obtain target test data with strong characteristics, so as to determine the target denitrification reductant flow ratio value corresponding to each target denitrification spray gun under the target denitrification efficiency corresponding to multiple load values, thereby improving the SNCR denitrification effect and the denitrification efficiency, and further improving the stability of the circulating fluidized bed boiler under different operating conditions of SNCR denitrification.

[0171] See also Figure 5 , Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 5 As shown in , 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 via the bus 530. When the machine-readable instructions are executed by the processor 510, the above-mentioned Figure 2 The steps of the SNCR denitration test method in the method embodiment shown, the specific implementation method can be found in the method embodiment, and will not be repeated here.

[0173] The present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program can execute the above-mentioned Figure 2 The steps of the SNCR denitration test method in the method embodiment shown, the specific implementation method can be found in the method embodiment, and will not be repeated here.

[0174] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0175] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0176] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

[0178] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that can be executed by a processor. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., various media that can store program codes.

[0179] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A SNCR denitrification test method, characterized in that: The method is applied to a circulating fluidized bed boiler; The circulating fluidized bed boiler comprises a plurality of denitrification spray guns respectively arranged at a plurality of regional positions and a plurality of data acquisition devices respectively arranged at a plurality of detection positions, and the method comprises: Based on the collected temperature average corresponding to the separator inlet of the circulating fluidized bed boiler, a plurality of target denitrification spray guns are determined among the denitrification spray guns; Based on a plurality of preset test condition parameters, the target denitration spray gun is controlled to perform at least one test cycle of the SNCR denitration test according to each set of the test condition parameters, until the duration of the SNCR denitration test is greater than a preset time threshold, and the test data corresponding to each test cycle under each set of the test condition parameters are obtained by using the data acquisition device; wherein the test condition parameters include a denitration reducing agent flow ratio value corresponding to each of the target denitration spray guns; For the stable test data in the test data, respectively judging whether each group of test data in the stable test data satisfies at least one of a plurality of preset conditions, and based on the judgment result, screening out target test data that satisfies all of the preset conditions from the stable test data; Based on the target test data, a target denitration reducing agent flow ratio value corresponding to each of the target denitration spray guns at a target denitration efficiency corresponding to a plurality of load values ​​is determined.

2. The method according to claim 1, characterized in that The regional positions include a separator inlet, a separator outlet, a dense phase area, a dilute phase area and a wind chamber; based on the collected temperature average corresponding to the separator inlet of the circulating fluidized bed boiler, a plurality of target denitrification spray guns are determined in the denitrification spray guns, including: Obtaining the collected temperature average corresponding to the separator inlet of the circulating fluidized bed boiler, and determining whether the temperature average is greater than a preset temperature threshold; If the temperature average is greater than a preset temperature threshold, the denitrification spray guns corresponding to the separator inlet and the separator outlet are respectively determined as target denitrification spray guns; If the temperature average is less than or equal to the preset temperature threshold, the denitrification spray gun corresponding to the separator outlet is determined as the target denitrification spray gun, and a target denitrification spray gun is determined among the denitrification spray guns corresponding to the dense phase zone, the dilute phase zone and the wind chamber respectively.

3. The method according to claim 1, characterized in that Based on the preset multiple groups of test condition parameters, the target denitration spray gun is controlled to perform at least one test cycle of the SNCR denitration test according to each group of the test condition parameters, until the duration of the SNCR denitration test is greater than a preset time threshold, and the test data corresponding to each test cycle under each group of the test condition parameters is obtained by using the data acquisition device, including: For each set of test condition parameters in the preset multiple sets of test condition parameters, in each test cycle, the target denitration spray gun is controlled to perform the SNCR denitration test in the test cycle according to the test condition parameters, and the test data corresponding to the test cycle under the set of test condition parameters is obtained by using the data acquisition device; Based on the multiple load values ​​included in the test data, calculate the target load fluctuation rate corresponding to the test period, and determine whether the target load fluctuation rate is less than a preset fluctuation rate threshold to obtain a first determination result; Based on the first judgment result, the test data corresponding to the test cycle under the set of test operating parameters is determined as stable test data or fluctuating test data, and the SNCR denitration test of the next test cycle is performed according to the next set of test operating parameters or the set of test operating parameters; The SNCR denitrification test of at least one test cycle under the multiple groups of test operating parameters is cyclically performed until the duration of the SNCR denitrification test is greater than a preset time threshold, and stable test data and fluctuating test data corresponding to each of the test cycles under each group of the test operating parameters are obtained.

4. The method according to claim 3, characterized in that Based on the first judgment result, determining the test data corresponding to the test cycle under the group of test operating parameters as stable test data or fluctuating test data, and performing the SNCR denitration test of the next test cycle according to the next group of test operating parameters or the group of test operating parameters, includes: 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 operating 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 operating condition parameters; 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 operating parameters is determined as fluctuation test data, and the SNCR denitrification test of the next test cycle is carried out according to the set of test operating parameters.

5. The method according to claim 1, characterized in that The test data at least include the load value and flue gas flow rate of the circulating fluidized bed boiler, the nitrogen oxide concentration value corresponding to each of the detection positions, and the molar number of ammonia molecules corresponding to each of the target denitrification spray guns.

6. The method according to claim 5, characterized in that The test data also includes the denitration efficiency and ammonia nitrogen molar ratio corresponding to each of the target denitration spray guns; The denitration efficiency and the ammonia nitrogen molar ratio are obtained by the following steps: 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 spray guns; Based on the nitrogen oxide concentration value, the molar number of ammonia molecules and the flue gas flow rate, a preset molar number calculation formula is used to determine and obtain the ammonia nitrogen molar ratio corresponding to each of the target denitrification spray guns.

7. The method according to claim 1, characterized in that The respectively judging whether each group of test data in the stable test data satisfies at least one of a plurality of preset conditions, and based on the judging result, selecting target test data that satisfies all the preset conditions in the stable test data, comprises: For each group of test data in the stable test data, determine whether the group of test data meets at least one of a plurality of preset conditions to obtain a second determination result; When the second judgment result is that the group of test data does not meet all of the preset conditions, the group of test data is determined as candidate test data; 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 the target test data.

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

9. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and 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 execute the steps of the SNCR denitrification test method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the SNCR denitration test method according to any one of claims 1 to 7 are executed.

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