Ammonia injection debugging method, device and electronic equipment

Abstract

The present disclosure provides an ammonia injection debugging method, device and electronic device, relating to the technical field of SCR denitration. The method includes: obtaining cross-sectional air flow data of each selective catalytic reduction (SCR) ammonia injection grid partition under m operating loads, where m is a positive integer; determining a target ammonia flow rate based on the cross-sectional air flow data and the operating time of each of the m operating loads; and adjusting the SCR ammonia injection grid partition based on the target ammonia flow rate. By obtaining the cross-sectional air flow data of each SCR ammonia injection grid partition under m operating loads to determine the target ammonia flow rate, it is possible to quickly adjust the ammonia injection amount under different operating loads. At the same time, by establishing the SCR ammonia injection grid partition, precise adjustment can be achieved, reducing the adjustment cost and shortening the adjustment cycle.

Description

Technical Field

[0001] The present disclosure relates to the technical field of SCR denitration, and particularly to a method, a device and an electronic device for ammonia injection commissioning. Background Art

[0002] During the operation of a thermal power unit, changes in upstream working conditions can cause changes in the upstream flue gas flow rate and NOx distribution of the denitration AIG, affecting the uniformity of the NH3 / NO molar ratio distribution in the flue gas at the denitration inlet and increasing the local ammonia slip concentration at the reactor outlet.

[0003] In the current technology, the ammonia injection grid is adjusted according to the outlet NOx concentration distribution, going through the repeated process of "testing - adjustment - testing". The test adjustment takes a long time and has high requirements for the operation stability of the unit, making it difficult to meet the long-term stable operation conditions in actual operation. It is necessary to conduct cyclic test adjustments at different high, medium, and low loads, and each load section needs to operate stably for a certain period of time. It is difficult to meet this load requirement in practice, resulting in a long overall cycle for ammonia injection optimization work.

[0004] Disclosure Content

[0005] The present disclosure aims to solve at least one of the technical problems in the related art to some extent.

[0006] To this end, one object of the present disclosure is to propose a method for ammonia injection commissioning.

[0007] The second object of the present disclosure is to propose a device for ammonia injection commissioning.

[0008] The third object of the present disclosure is to propose an electronic device.

[0009] The fourth object of the present disclosure is to propose a non-transitory computer-readable storage medium.

[0010] The fifth object of the present disclosure is to propose a computer program product.

[0011] To achieve the above object, a first aspect embodiment of the present disclosure proposes a method for ammonia injection commissioning, including: obtaining cross-sectional air flow data of each selective catalytic reduction (SCR) ammonia injection grid partition under m operating loads, where m is a positive integer; determining a target ammonia flow rate based on the cross-sectional air flow data and the operating time of each of the m operating loads; and adjusting the SCR ammonia injection grid partition based on the target ammonia flow rate.

[0012] According to an embodiment of the present disclosure, determining the target ammonia flow rate based on the cross-sectional air flow data and the operating time of each of the m operating loads includes: determining the sub-ammonia flow rate of each of the m operating loads based on the cross-sectional air flow data; and determining the target ammonia flow rate based on the sub-ammonia flow rate and the operating time of each of the m operating loads.

[0013] According to an embodiment of the present disclosure, the cross-sectional gas flow data includes the regional flue gas flow rate, the regional area, and the nitrogen oxide concentration. Based on the cross-sectional gas flow data, determining the sub-ammonia flow rate for each of the m operating loads includes: obtaining the ammonia flow rate calculation coefficient and the target nitrogen oxide concentration; for the i-th operating load, taking the difference between the nitrogen oxide concentration of the i-th operating load and the preset nitrogen oxide concentration to determine the nitrogen oxide concentration difference, where 1 ≤ i ≤ m; multiplying the nitrogen oxide concentration difference, the regional flue gas flow rate, the regional area, and the ammonia flow rate calculation coefficient to obtain the sub-ammonia flow rate for the i-th operating load.

[0014] According to an embodiment of the present disclosure, determining the target ammonia flow rate based on the sub-ammonia flow rate and the operating time of each of the m operating loads includes: determining the operating weight for each of the m operating loads based on the operating time of each of the m operating loads; determining the sub-target ammonia flow rate for each of the m operating loads based on the sub-ammonia flow rate and the operating weight of each of the m operating loads; summing up the sub-target ammonia flow rates to determine the target ammonia flow rate.

[0015] According to an embodiment of the present disclosure, determining the operating weight for each of the m operating loads based on the operating time of each of the m operating loads includes: summing up the operating time of each of the m operating loads to determine the total operating time; dividing the operating time of each of the m operating loads by the total operating time to determine the operating weight for each of the m operating loads.

[0016] According to an embodiment of the present disclosure, the SCR ammonia injection grid partition includes a branch valve. Adjusting the SCR ammonia injection grid partition based on the target ammonia flow rate includes: obtaining the valve characteristic curve of the branch valve; determining the opening value of each branch valve based on the target ammonia flow rate and the valve characteristic curve; adjusting each branch valve to the corresponding opening value.

[0017] According to an embodiment of the present disclosure, after adjusting the SCR ammonia injection grid partition based on the target ammonia flow rate, it includes: obtaining the operating nitrogen oxide concentration of the SCR ammonia injection grid partition; for the j-th operating load, determining the relative standard deviation of the nitrogen oxide concentration distribution of the SCR ammonia injection grid partition based on the operating nitrogen oxide concentration of the j-th operating load, where 1 ≤ j ≤ m; verifying the target ammonia flow rate based on the relative standard deviation of the nitrogen oxide concentration distribution.

[0018] According to an embodiment of the present disclosure, adjusting the SCR ammonia injection grid partition based on the relative standard deviation of the nitrogen oxide concentration distribution includes: comparing the relative standard deviation of the nitrogen oxide concentration distribution with the deviation threshold; in response to the relative standard deviation of the nitrogen oxide concentration distribution being less than the deviation threshold, the verification passes.

[0019] To achieve the above object, an embodiment of the second aspect of the present disclosure provides an ammonia injection debugging device, including: an acquisition module, configured to acquire cross-sectional air flow data of each selective catalytic reduction (SCR) ammonia injection grid partition under m operating loads, where m is a positive integer; a determination module, configured to determine a target ammonia flow rate based on the cross-sectional air flow data and the operating time of each of the m operating loads; and an adjustment module, configured to adjust the SCR ammonia injection grid partition based on the target ammonia flow rate.

[0020] To achieve the above object, an embodiment of the third aspect of the present disclosure provides an electronic device, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to implement the ammonia injection debugging method as described in the embodiment of the first aspect of the present disclosure.

[0021] To achieve the above object, an embodiment of the fourth aspect of the present disclosure provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to implement the ammonia injection debugging method as described in the embodiment of the first aspect of the present disclosure.

[0022] To achieve the above object, an embodiment of the fifth aspect of the present disclosure provides a computer program product, including a computer program, where the computer program is used to implement the ammonia injection debugging method as described in the embodiment of the first aspect of the present disclosure when executed by a processor.

[0023] By acquiring the cross-sectional air flow data of each SCR ammonia injection grid partition under m operating loads to determine the target ammonia flow rate, it is possible to quickly adjust the ammonia injection amount under different operating loads. At the same time, by establishing the SCR ammonia injection grid partition, precise adjustment can be achieved, reducing the adjustment cost and shortening the adjustment cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of an ammonia injection debugging method according to an embodiment of the present disclosure;

[0025] Figure 2 is a schematic diagram of the SCR ammonia injection grid partition structure of an ammonia injection debugging method according to an embodiment of the present disclosure;

[0026] Figure 3 is a schematic diagram of another ammonia injection debugging method according to an embodiment of the present disclosure;

[0027] Figure 4 is a schematic diagram of another ammonia injection debugging method according to an embodiment of the present disclosure;

[0028] Figure 5It is a schematic diagram of a valve characteristic curve according to an embodiment of the present disclosure;

[0029] Figure 6 It is a schematic diagram of another ammonia injection commissioning method according to an embodiment of the present disclosure;

[0030] Figure 7 It is a schematic diagram of an ammonia injection commissioning device according to an embodiment of the present disclosure;

[0031] Figure 8 It is a schematic diagram of an electronic device according to an embodiment of the present disclosure. Specific Embodiments

[0032] The embodiments of the present disclosure will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present disclosure and should not be construed as limiting the present disclosure.

[0033] Figure 1 It is a schematic diagram of an exemplary embodiment of an ammonia injection commissioning method proposed by the present disclosure. As Figure 1 shown, the ammonia injection commissioning method includes the following steps:

[0034] S101, obtain the cross-sectional air flow data of each selective catalytic reduction (SCR) ammonia injection grid partition under m operating loads, where m is a positive integer.

[0035] In the embodiments of the present disclosure, the operating load refers to the amount of flue gas discharged under the stable operation of the power plant, which is used to characterize the size of the discharged flue gas volume. The greater the operating load, the greater the discharged flue gas volume. It should be noted that there can be multiple operating loads, which are set in advance and can be changed according to actual needs, and no specific limitations are made here.

[0036] It should be noted that the SCR ammonia injection grid partition refers to the area divided based on the ammonia injection grid and ammonia injection branch pipes. As Figure 2 shown, it includes a total of 7 groups of ammonia injection grids, namely A, B..G. Each group is provided with 4 ammonia injection branch pipes along the depth direction, so as to divide the ammonia injection area into 28 SCR ammonia injection grid partitions, and each ammonia injection partition includes an ammonia injection branch pipe.

[0037] In the embodiments of the present disclosure, the cross-sectional air flow data includes various types, which are not limited herein. For example, it may include regional flue gas flow rate, regional ammonia flow rate, regional NOx concentration, and regional area, etc. In the embodiments of the present disclosure, the method for obtaining the interface air flow data may be various, which are not limited herein. For example, the cross-sectional air flow data can be detected by a sensor, and the sensor can be fixed on the SCR ammonia injection grid partition. Optionally, the interface air flow data can also be obtained by means of digital simulation.

[0038] S102. Determine the target ammonia flow rate based on the cross-sectional air flow data and the running time of each of the m running loads.

[0039] It should be noted that the target ammonia flow rate is the ammonia injection amount applicable to the m running loads. It can be understood that in different seasons or different stages, different running loads are required for operation. If the ammonia injection amount for each running load is calculated separately, the calculation cost is relatively high. Moreover, when switching between two running loads, the adjustment range may be large and the adjustment period may be long. Therefore, the above problems can be solved by determining the target ammonia flow rate.

[0040] The running time of each of the m running loads may be different, which can be specifically determined according to the actual operation plan or actual operation conditions. In the embodiments of the present disclosure, the ammonia flow rate corresponding to each running load can be determined based on the cross-sectional air flow data, and then the corresponding ratio can be determined based on the running time corresponding to each running load, so as to determine the target ammonia flow rate.

[0041] S103. Adjust the SCR ammonia injection grid partition based on the target ammonia flow rate.

[0042] In the embodiments of the present disclosure, the opening degree of the ammonia injection branch pipe of each SCR ammonia injection grid partition can be determined through the target ammonia flow rate, so as to enable the ammonia injection branch pipe to output ammonia gas with the target ammonia flow rate.

[0043] It should be noted that since the ammonia output amount corresponding to the opening degree of each ammonia injection branch pipe may be different, therefore, when adjusting the opening degree of the ammonia injection branch pipe, it is also necessary to obtain the output characteristics of each ammonia injection branch pipe. And based on the output characteristics, determine the target opening degree to be adjusted.

[0044] In the embodiments of the present disclosure, first, cross-sectional air flow data of each selective catalytic reduction (SCR) ammonia injection grid partition under m operating loads are obtained, where m is a positive integer. Then, based on the cross-sectional air flow data and the operating time of each of the m operating loads, a target ammonia flow rate is determined. Finally, the SCR ammonia injection grid partition is adjusted based on the target ammonia flow rate. By obtaining the cross-sectional air flow data of each SCR ammonia injection grid partition under m operating loads to determine the target ammonia flow rate, it is possible to quickly adjust the ammonia injection amount under different operating loads. At the same time, by establishing the SCR ammonia injection grid partition, precise adjustment can be achieved, reducing the adjustment cost and shortening the adjustment cycle.

[0045] In the above embodiments, based on the cross-sectional air flow data and the operating time of each of the m operating loads, a target ammonia flow rate is determined. It can also be achieved by Figure 3 Further explanation is as follows. The method includes:

[0046] S301: Based on the cross-sectional air flow data, determine the sub-ammonia flow rates of each of the m operating loads.

[0047] In the embodiments of the present disclosure, the cross-sectional air flow data includes the regional flue gas velocity, regional area, and nitrogen oxide concentration. To determine the sub-ammonia flow rates of each of the m operating loads, first, an ammonia flow rate calculation coefficient and a target nitrogen oxide concentration are obtained. For the i-th operating load, the difference between the nitrogen oxide concentration of the i-th operating load and the preset nitrogen oxide concentration is calculated to determine the nitrogen oxide concentration difference, where 1 ≤ i ≤ m. Finally, the nitrogen oxide concentration difference, regional flue gas velocity, regional area, and ammonia flow rate calculation coefficient are multiplied to obtain the sub-ammonia flow rate of the i-th operating load.

[0048] It should be noted that the ammonia flow rate calculation coefficient is set in advance and is a constant set in advance, which can be changed according to actual design needs and is not limited here. The target nitrogen oxide concentration is the expected nitrogen oxide concentration value, which is set in advance and is lower than the national minimum emission standard. For example, the target nitrogen oxide concentration can be milligrams per cubic meter.

[0049] The calculation formula for the sub-ammonia flow rate of the i-th operating load is:

[0050]

[0051] where F′ n is the sub-ammonia flow rate of the i-th operating load in the n-th region, a is the ammonia flow rate calculation coefficient, μ′ n is the flue gas velocity of the i-th operating load in the n-th region, A′ n is the regional area of the i-th operating load in the n-th region, and C′ nis the nitrogen oxide concentration of the i-th operating load in the n-th area, and q is the target nitrogen oxide concentration.

[0052] S302. Determine the target ammonia flow rate based on the sub-ammonia flow rate and the operating time of each of the m operating loads.

[0053] In the embodiment of the present disclosure, after obtaining the sub-ammonia flow rates of each of the m operating loads, the target ammonia flow rate can be determined based on the sub-ammonia flow rate and the operating time of each of the m operating loads. First, determine the operating weights of each of the m operating loads based on the operating time of each of the m operating loads, and then determine the sub-target ammonia flow rates of each of the m operating loads based on the sub-ammonia flow rates of each of the m operating loads and the operating weights of each of the m operating loads, and sum up the sub-target ammonia flow rates to determine the target ammonia flow rate.

[0054] The formula for determining the target ammonia flow rate is:

[0055]

[0056] where F n is the target ammonia flow rate in the n-th area, is the sub-ammonia flow rate of the i-th operating load in the n-th area, t i is the operating time of the i-th operating load in the n-th area, and t is the total operating time. It can be seen from the formula that the greater the operating time of the operating load, the greater the operating weight.

[0057] In the embodiment of the present disclosure, first determine the sub-ammonia flow rates of each of the m operating loads based on the cross-sectional air flow data, and then determine the target ammonia flow rate based on the sub-ammonia flow rate and the operating time of each of the m operating loads. Thus, by calculating the sub-ammonia flow rate of each operating load and determining the operating weight of the sub-ammonia flow rate of each operating load based on the operating time, the target ammonia flow rate can be accurately obtained, providing a data basis for subsequent adjustment of the SCR ammonia injection grid partition.

[0058] In the embodiment of the present disclosure, to determine the operating weights of each of the m operating loads based on the operating time of each of the m operating loads, first sum up the operating times of each of the m operating loads to determine the total operating time, and then divide the operating time of each of the m operating loads by the total operating time to determine the operating weights of each of the m operating loads.

[0059] In the above embodiment, to adjust the SCR ammonia injection grid partition based on the target ammonia flow rate, it can also be done through Figure 4 For further explanation, the method includes:

[0060] S401. Obtain the valve characteristic curve of the branch pipe valve.

[0061] The valve characteristic curve of the branch pipe valve is the curve of the opening degree of the branch pipe valve and the corresponding flow rate. For example, as Figure 5 shown in the valve characteristic curve, it can be seen through Figure 5 that the valve characteristic curves corresponding to different valves can be different. Therefore, before determining the opening degree of the branch pipe valve, it is first necessary to determine the valve characteristic curve of the branch pipe valve.

[0062] In the embodiment of the present disclosure, through the ammonia injection optimization test after starting the machine, during the cold state of the unit, the flow rate characteristics of the ammonia injection grid are tested. All branch pipe valves are placed at the same opening degree, and the dilution air flow rate values of a single branch pipe valve in the fully closed and fully open states are recorded successively to obtain the valve characteristic curve of each branch pipe regulating valve.

[0063] S402, based on the target ammonia flow rate and the valve characteristic curve, determine the opening degree value of each branch pipe valve.

[0064] After obtaining the valve characteristic curve of each branch pipe regulating valve, the corresponding opening degree value can be determined by looking up the target ammonia flow rate on the valve characteristic curve.

[0065] S403, adjust each branch pipe valve to the corresponding opening degree value.

[0066] In the embodiment of the present disclosure, first obtain the valve characteristic curve of the branch pipe valve, then based on the target ammonia flow rate and the valve characteristic curve, determine the opening degree value of each branch pipe valve, and finally adjust each branch pipe valve to the corresponding opening degree value. Thus, through the valve characteristic curve of each branch pipe valve, precise adjustment can be performed for any SCR ammonia injection grid partition, greatly improving the adjustment accuracy of the SCR ammonia injection grid partition.

[0067] In the above embodiment, after adjusting the SCR ammonia injection grid partition based on the target ammonia flow rate, further operations can be performed through Figure 5 such as Figure 5 shown, the method includes:

[0068] S501, obtain the operating nitrogen oxide concentration of the SCR ammonia injection grid partition.

[0069] In the embodiment of the present disclosure, the operating nitrogen oxide concentrations at m operating loads can be measured by a nitrogen oxide detection instrument. It should be noted that the operating nitrogen oxide concentration refers to the nitrogen oxide concentration of each SCR ammonia injection grid partition after reaching the stable operating load, where the stable operating load is one of the m operating loads.

[0070] S502, for the jth operating load, determine the relative standard deviation of the nitrogen oxide concentration distribution of the SCR ammonia injection grid partition based on the operating nitrogen oxide concentration of the jth operating load, where 1 ≤ j ≤ m.

[0071] In the embodiments of the present disclosure, under j operating loads, in order to verify the uniformity of the nitrogen oxide concentration distribution, it can be verified by obtaining the relative standard deviation of the nitrogen oxide concentration distribution of all SCR ammonia injection grid partitions.

[0072] In the embodiments of the present disclosure, the relative standard deviation of the nitrogen oxide concentration distribution can be obtained by the following formula:

[0073]

[0074] where μ is the average value of the operating nitrogen oxide concentrations of all SCR ammonia injection grid partitions, X i is the operating nitrogen oxide concentration of the i-th SCR ammonia injection grid partition, N is the number of partitions of the operating nitrogen oxide concentration, and σ is the relative standard deviation of the nitrogen oxide concentration distribution.

[0075] S503. Verify the target ammonia flow rate based on the relative standard deviation of the nitrogen oxide concentration distribution.

[0076] In the embodiments of the present disclosure, the relative standard deviation of the nitrogen oxide concentration distribution can be compared with a deviation threshold. In response to the relative standard deviation of the nitrogen oxide concentration distribution being less than the deviation threshold, the verification passes. It should be noted that the deviation threshold is set in advance and can be changed according to actual design requirements. For example, the deviation threshold can be 25%.

[0077] It should be noted that when the relative standard deviation of the nitrogen oxide concentration distribution is large, the opening value of the branch valve in the corresponding area also needs to be adjusted.

[0078] In the embodiments of the present disclosure, first, obtain the operating nitrogen oxide concentration of the SCR ammonia injection grid partition, then for the j-th operating load, determine the relative standard deviation of the nitrogen oxide concentration distribution of the SCR ammonia injection grid partition based on the operating nitrogen oxide concentration of the j-th operating load, where 1 ≤ j ≤ m, and finally verify the target ammonia flow rate based on the relative standard deviation of the nitrogen oxide concentration distribution. Thus, through the relative standard deviation of the nitrogen oxide concentration distribution of the SCR ammonia injection grid partition, the target ammonia flow rate can be verified, thereby saving the workload of hot commissioning and reducing the commissioning cost and commissioning time.

[0079] Corresponding to the ammonia injection commissioning methods provided in the above several embodiments, an embodiment of the present disclosure also provides an ammonia injection commissioning device. Since the ammonia injection commissioning device provided in the embodiments of the present disclosure corresponds to the ammonia injection commissioning methods provided in the above several embodiments, the implementation manners of the above ammonia injection commissioning methods are also applicable to the ammonia injection commissioning device provided in the embodiments of the present disclosure and will not be described in detail in the following embodiments.

[0080] Figure 6 The following is a schematic diagram of an ammonia injection debugging device proposed by the present disclosure. As Figure 6 shown, the ammonia injection debugging device 600 includes: an acquisition module 610, a determination module 620, and an adjustment module 630.

[0081] Among them, the acquisition module 610 is used to acquire the cross-sectional air flow data of each selective catalytic reduction (SCR) ammonia injection grid partition under m operating loads, where m is a positive integer.

[0082] The determination module 620 is used to determine the target ammonia flow rate based on the cross-sectional air flow data and the operating time of each of the m operating loads.

[0083] The adjustment module 630 is used to adjust the SCR ammonia injection grid partition based on the target ammonia flow rate.

[0084] In an embodiment of the present disclosure, the determination module 620 is further used to: determine the sub-ammonia flow rates of each of the m operating loads based on the cross-sectional air flow data; determine the target ammonia flow rate based on the sub-ammonia flow rates and the operating time of each of the m operating loads.

[0085] In an embodiment of the present disclosure, the determination module 620 is further used to: acquire the ammonia flow rate calculation coefficient and the target nitrogen oxide concentration; for the i-th operating load, calculate the difference between the nitrogen oxide concentration of the i-th operating load and the preset nitrogen oxide concentration to determine the nitrogen oxide concentration difference, where 1 ≤ i ≤ m; multiply the nitrogen oxide concentration difference, the regional flue gas velocity, the regional area, and the ammonia flow rate calculation coefficient to obtain the sub-ammonia flow rate of the i-th operating load.

[0086] In an embodiment of the present disclosure, the determination module 620 is further used to: determine the operating weights of each of the m operating loads based on the operating time of each of the m operating loads; determine the sub-target ammonia flow rates of each of the m operating loads based on the sub-ammonia flow rates and the operating weights of each of the m operating loads; sum up the sub-target ammonia flow rates to determine the target ammonia flow rate.

[0087] In an embodiment of the present disclosure, the determination module 620 is further used to: sum up the operating times of each of the m operating loads to determine the total operating time; divide the operating time of each of the m operating loads by the total operating time to determine the operating weights of each of the m operating loads.

[0088] In an embodiment of the present disclosure, the adjustment module 630 is further used to: acquire the valve characteristic curve of the branch pipe valve; determine the opening value of each branch pipe valve based on the target ammonia flow rate and the valve characteristic curve; adjust each branch pipe valve to the corresponding opening value.

[0089] In one embodiment of the present disclosure, the adjustment module 630 is further configured to: obtain the operating nitrogen oxide concentration of the SCR ammonia injection grid partition; for the j-th operating load, determine the relative standard deviation of the nitrogen oxide concentration distribution of the SCR ammonia injection grid partition based on the operating nitrogen oxide concentration of the j-th operating load, where 1 ≤ j ≤ m; verify the target ammonia flow rate based on the relative standard deviation of the nitrogen oxide concentration distribution.

[0090] In one embodiment of the present disclosure, the adjustment module 630 is further configured to: compare the relative standard deviation of the nitrogen oxide concentration distribution with a deviation threshold; in response to the relative standard deviation of the nitrogen oxide concentration distribution being less than the deviation threshold, the verification passes.

[0091] To implement the above embodiments, an electronic device 700 is further proposed in the embodiments of the present disclosure, as Figure 7 shown. The electronic device 700 includes: a processor 701 and a memory 702 communicatively connected to the processor. The memory 702 stores instructions executable by at least one processor. The instructions are executed by at least one processor 701 to implement the ammonia injection debugging method according to the embodiments of the first aspect of the present disclosure.

[0092] To implement the above embodiments, a non-transitory computer-readable storage medium storing computer instructions is further proposed in the embodiments of the present disclosure, where the computer instructions are used to cause a computer to implement the ammonia injection debugging method according to the embodiments of the first aspect of the present disclosure.

[0093] To implement the above embodiments, a computer program product is further proposed in the embodiments of the present disclosure, including a computer program that implements the ammonia injection debugging method according to the embodiments of the first aspect of the present disclosure when executed by a processor.

[0094] In the description of the present disclosure, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present disclosure.

[0095] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, "a plurality of" means two or more unless specifically defined otherwise.

[0096] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0097] Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A method for ammonia injection debugging, characterized in that, it includes: Obtain the cross-sectional air flow data of each selective catalytic reduction (SCR) ammonia injection grid partition under m operating loads, where m is a positive integer; Determine the target ammonia flow rate based on the cross-sectional air flow data and the operating time of each of the m operating loads; Adjust the SCR ammonia injection grid partition based on the target ammonia flow rate.

2. The method according to claim 1, characterized in that, The step of determining the target ammonia flow rate based on the cross-sectional air flow data and the operating time of each of the m operating loads includes: Determine the sub-ammonia flow rates of each of the m operating loads based on the cross-sectional air flow data; Determine the target ammonia flow rate based on the sub-ammonia flow rates and the operating time of each of the m operating loads.

3. The method according to claim 2, characterized in that, The cross-sectional air flow data includes the regional flue gas velocity, the regional area, and the nitrogen oxide concentration. The step of determining the sub-ammonia flow rates of each of the m operating loads based on the cross-sectional air flow data includes: Obtain the ammonia flow rate calculation coefficient and the target nitrogen oxide concentration; For the i-th operating load, calculate the difference between the nitrogen oxide concentration of the i-th operating load and the preset nitrogen oxide concentration to determine the nitrogen oxide concentration difference, where 1 ≤ i ≤ m; Multiply the nitrogen oxide concentration difference, the regional flue gas velocity, the regional area, and the ammonia flow rate calculation coefficient to obtain the sub-ammonia flow rate of the i-th operating load.

4. The method according to claim 2 or 3, characterized in that, The step of determining the target ammonia flow rate based on the sub-ammonia flow rates and the operating time of each of the m operating loads includes: Determine the operating weights of each of the m operating loads based on the operating time of each of the m operating loads; Determine the sub-target ammonia flow rates of each of the m operating loads based on the sub-ammonia flow rates and the operating weights of each of the m operating loads; Sum up the sub-target ammonia flow rates to determine the target ammonia flow rate.

5. The method according to claim 4, characterized in that, The step of determining the operating weights of each of the m operating loads based on the operating time of each of the m operating loads includes: Sum up the operating times of each of the m operating loads to determine the total operating time; Divide the operating time of each of the m operating loads by the total operating time to determine the operating weights of each of the m operating loads.

6. The method according to claim 5, characterized in that, The SCR ammonia injection grid partition includes a branch pipe valve. The step of adjusting the SCR ammonia injection grid partition based on the target ammonia flow rate includes: Obtain the valve characteristic curve of the branch pipe valve; Determine the opening value of each branch pipe valve based on the target ammonia flow rate and the valve characteristic curve; Adjust each branch pipe valve to the corresponding opening value.

7. The method according to claim 6, characterized in that, After adjusting the SCR ammonia injection grid partition based on the target ammonia flow rate, it includes: Obtain the operating nitrogen oxide concentration of the SCR ammonia injection grid partition; For the j-th operating load, determine the relative standard deviation of the nitrogen oxide concentration distribution of the SCR ammonia injection grid partition based on the operating nitrogen oxide concentration of the j-th operating load, where 1 ≤ j ≤ m; Verify the target ammonia flow rate based on the relative standard deviation of the nitrogen oxide concentration distribution.

8. The method according to claim 7, wherein, the verifying the target ammonia flow rate based on the relative standard deviation of the nitrogen oxide concentration distribution includes: comparing the relative standard deviation of the nitrogen oxide concentration distribution with a deviation threshold; in response to the relative standard deviation of the nitrogen oxide concentration distribution being less than the deviation threshold, the verification passes.

9. An ammonia injection commissioning device, wherein, comprising: an acquisition module, configured to acquire cross-sectional air flow data of each selective catalytic reduction (SCR) ammonia injection grid partition under m operating loads, where m is a positive integer; a determination module, configured to determine a target ammonia flow rate based on the cross-sectional air flow data and the operating time of each of the m operating loads; an adjustment module, configured to adjust the SCR ammonia injection grid partition based on the target ammonia flow rate.

10. An electronic device, wherein, comprising a memory and a processor; wherein, the processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory, so as to implement the method according to any one of claims 1-8.

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