Control method and device for unit denitration, storage medium and electronic equipment

Abstract

The invention relates to a unit denitration control method and device, a storage medium and electronic equipment. Under the condition that the denitration flue gas of the generator set is located on the denitration side of the generator set, the first outlet concentration value of the denitration flue gas on the denitration A side in the denitration side and the second outlet concentration value of the denitration flue gas on the denitration B side in the denitration side are obtained; acquiring a concentration difference value between the first outlet concentration value and the second outlet concentration value; determining an expected concentration value corresponding to the concentration difference value and an adjustment value corresponding to the concentration difference value; according to the expected concentration value and the adjustment value, the outlet concentration of the target denitration side of the generator set is adjusted; the target denitration side comprises the denitration A side and / or the denitration B side; according to the technical scheme, the corresponding adjustment value is determined according to the outlet concentration difference value of the denitration A side and the denitration B side, so that the two sides are correspondingly controlled, the problem that the outlet concentrations of the two sides are unbalanced is solved, and stable operation of a unit is ensured.

Description

Technical Field

[0001] The present disclosure relates to the technical field of equipment control, and in particular to a control method, device, storage medium and electronic equipment for denitration of a unit. Background Art

[0002] At present, the power generation industry has stricter requirements on environmental protection parameters for generator sets. Among generator sets, thermal power units have high hours and short maintenance periods, so it is impossible to install matrix measurement equipment and zoned ammonia injection equipment in a short period of time, resulting in low accuracy of ammonia injection control for thermal power units, which is easy to cause environmental pollution. Summary of the invention

[0003] The purpose of the present disclosure is to provide a control method, device, storage medium and electronic equipment for denitration of a unit.

[0004] In order to achieve the above objectives, in a first aspect, the present disclosure provides a method for controlling denitration of a unit, the method comprising: In the case where the denitration flue gas of the generator set is at the denitration side of the generator set, obtaining a first outlet concentration value of the denitration flue gas at the denitration A side of the denitration side, and a second outlet concentration value of the denitration flue gas at the denitration B side of the denitration side; Obtaining a concentration difference between the first outlet concentration value and the second outlet concentration value; Determining an expected concentration value corresponding to the concentration difference and an adjustment value corresponding to the concentration difference; According to the expected concentration value and the adjustment value, the outlet concentration of the target denitration side of the generator set is adjusted; the target denitration side includes the denitration A side and / or the denitration B side.

[0005] Optionally, determining the adjustment value corresponding to the concentration difference includes: According to the concentration difference, the adjustment value is determined by a preset adjustment correspondence relationship; the preset adjustment correspondence relationship includes a correspondence relationship between multiple concentration differences and multiple adjustment values, and each concentration difference corresponds to an adjustment value; The concentration difference is positively correlated with the ratio of the adjustment value to the concentration difference.

[0006] Optionally, determining the adjustment value corresponding to the concentration difference includes: When the denitrification flue gas moves to the main exhaust port of the generator set, obtaining a third outlet concentration value of the denitrification flue gas at the main exhaust port; Determining a candidate adjustment value according to the third outlet concentration value and a preset proportional coefficient; In the case where it is determined that the candidate adjustment value is within the preset threshold range, the candidate adjustment value is used as the adjustment value.

[0007] Optionally, the target denitration side includes the denitration A side or the denitration B side; and adjusting the outlet concentration of the target denitration side of the generator set according to the expected concentration value and the adjustment value includes: Taking the difference between the expected concentration value and the adjustment value as the target adjustment value; Determining a valve adjustment amount on the target denitration side according to the target adjustment value; According to the valve adjustment amount, the opening of the ammonia injection valve on the target denitration side is adjusted to adjust the outlet concentration on the target denitration side.

[0008] Optionally, the target denitration side includes the denitration A side and the denitration B side; and adjusting the outlet concentration of the target denitration side of the generator set according to the expected concentration value and the adjustment value includes: According to the difference between the expected concentration value and the adjustment value, determine a first target adjustment value corresponding to the first denitration side and a second target adjustment value corresponding to the second denitration side; the first denitration side is the side with a larger outlet concentration value between the denitration A side and the denitration B side; the second denitration side is the side with a smaller outlet concentration value between the denitration A side and the denitration B side; The outlet concentrations of the first denitration side and the second denitration side are adjusted according to the first target adjustment value and the second target adjustment value.

[0009] Optionally, determining a first target adjustment value corresponding to the first denitration side and a second target adjustment value corresponding to the second denitration side according to the difference between the expected concentration value and the adjustment value includes: Determining a pending adjustment value according to a difference between the expected concentration value and the adjustment value; Determining a concentration average value according to the first outlet concentration value and the second outlet concentration value; The first target adjustment value and the second target adjustment value are determined according to the pending adjustment value and the average concentration value.

[0010] Optionally, adjusting the outlet concentrations of the first denitration side and the second denitration side according to the first target adjustment value and the second target adjustment value includes: determining a first valve adjustment amount on the first denitration side according to the first target adjustment value; According to the first valve adjustment amount, adjusting the opening of the ammonia injection valve on the first denitration side to reduce the outlet concentration of the first denitration side; determining a second valve adjustment amount at the second denitration side according to the second target adjustment value; According to the adjustment amount of the second valve, the opening of the ammonia injection valve on the second denitrification side is adjusted to increase the outlet concentration on the second denitrification side.

[0011] In a second aspect, the present disclosure provides a control device for denitration of a unit, the device comprising: A first acquisition module is used to acquire, when the denitration flue gas of the generator set is at the denitration side of the generator set, a first outlet concentration value of the denitration flue gas on the denitration A side of the denitration side, and a second outlet concentration value of the denitration flue gas on the denitration B side of the denitration side; A second acquisition module, used to acquire a concentration difference between the first outlet concentration value and the second outlet concentration value; A determination module, used to determine an expected concentration value corresponding to the concentration difference value, and an adjustment value corresponding to the concentration difference value; An adjustment module is used to adjust the outlet concentration of the target denitration side of the generator set according to the expected concentration value and the adjustment value; the target denitration side includes the denitration A side and / or the denitration B side.

[0012] Optionally, the determination module is used to determine the adjustment value according to the concentration difference through a preset adjustment correspondence; the preset adjustment correspondence includes a correspondence between multiple concentration difference values ​​and multiple adjustment values, each concentration difference value corresponds to an adjustment value; the concentration difference value is positively correlated with the ratio of the adjustment value to the concentration difference value.

[0013] Optionally, the determination module is used to obtain a third outlet concentration value of the denitrification flue gas at the total outlet when the denitrification flue gas moves to the total outlet of the generator set; determine a candidate adjustment value based on the third outlet concentration value and a preset proportional coefficient; and when it is determined that the candidate adjustment value is within a preset threshold range, use the candidate adjustment value as the adjustment value.

[0014] Optionally, the target denitrification side includes the denitrification A side or the denitrification B side; the adjustment module is used to take the difference between the expected concentration value and the adjustment value as the target adjustment value; determine the valve adjustment amount of the target denitrification side according to the target adjustment value; adjust the opening of the ammonia injection valve of the target denitrification side according to the valve adjustment amount to adjust the outlet concentration of the target denitrification side.

[0015] Optionally, the target denitrification side includes the denitrification A side and the denitrification B side; the adjustment module is used to determine a first target adjustment value corresponding to the first denitrification side, and a second target adjustment value corresponding to the second denitrification side according to the difference between the expected concentration value and the adjustment value; the first denitrification side is the side with a larger outlet concentration value between the denitrification A side and the denitrification B side; the second denitrification side is the side with a smaller outlet concentration value between the denitrification A side and the denitrification B side; according to the first target adjustment value and the second target adjustment value, the outlet concentrations of the first denitrification side and the second denitrification side are adjusted.

[0016] Optionally, the adjustment module is used to determine a pending adjustment value based on the difference between the expected concentration value and the adjustment value; determine an average concentration value based on the first outlet concentration value and the second outlet concentration value; and determine the first target adjustment value and the second target adjustment value based on the pending adjustment value and the average concentration value.

[0017] Optionally, the adjustment module is used to determine a first valve adjustment amount on the first denitrification side according to the first target adjustment value; adjust the opening of an ammonia injection valve on the first denitrification side according to the first valve adjustment amount to reduce the outlet concentration of the first denitrification side; determine a second valve adjustment amount on the second denitrification side according to the second target adjustment value; adjust the opening of an ammonia injection valve on the second denitrification side according to the second valve adjustment amount to increase the outlet concentration of the second denitrification side.

[0018] In a third aspect, the present disclosure provides a non-temporary computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for controlling denitrification of the unit described in the first aspect.

[0019] In a fourth aspect, the present disclosure provides an electronic device, including: a memory having a computer program stored thereon; A processor is used to execute the computer program in the memory to implement the steps of the control method for denitrification of the unit described in the first aspect.

[0020] Through the above technical scheme, the corresponding adjustment value is determined according to the difference in outlet concentration between the denitration A side and the denitration B side, so as to control the two sides accordingly, avoid the problem of unbalanced outlet concentration on both sides, and ensure the stable operation of the unit; and the control logic optimization can be carried out on the existing equipment of the unit, reducing the maintenance cost of the equipment.

[0021] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. The accompanying drawings are as follows.

[0023] Figure 1 The present invention is a flow chart showing a method for controlling denitration of a unit according to an exemplary embodiment.

[0024] Figure 2 is based on Figure 1 A flowchart of a method for controlling denitration of a unit is shown in an exemplary embodiment.

[0025] Figure 3 is based on Figure 2 A flowchart of a method for controlling denitration of a unit is shown in an exemplary embodiment.

[0026] Figure 4 is based on Figure 2 A flow chart of another method for controlling denitration of a unit is shown as an exemplary embodiment.

[0027] Figure 5 The figure is a flow chart of another method for controlling denitration of a unit according to an exemplary embodiment.

[0028] Figure 6 The present invention is a block diagram of a control device for denitration of a unit according to an exemplary embodiment.

[0029] Figure 7 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0030] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0031] At present, the power generation industry has stricter requirements on environmental protection parameters for generator sets. Among generator sets, thermal power units have high hours and short maintenance periods, so it is impossible to install matrix measurement equipment and zoned ammonia injection equipment in a short period of time, resulting in low accuracy of ammonia injection control for thermal power units, which is easy to cause environmental pollution.

[0032] The flue gas generated by the generator set needs to be processed through multiple links such as denitrification, desulfurization and dust removal before being discharged into the air through the total exhaust port of the generator set to avoid the impact of the flue gas on the environment. In the related technology, in the process of denitrification of flue gas, the denitrification A side and the denitrification B side of the generator set can be logically controlled by a single PID control loop on both sides to adjust the outlet concentration on both sides. However, the single PID control loop has the following problems: during the load increase or decrease or combustion adjustment of the generator set, the single PID control loop has a slow response speed, which can easily cause the total exhaust outlet concentration of the generator set to be too high, exceeding the set value, thereby reducing the ammonia injection control effect.

[0033] In order to solve the above problems, the present disclosure provides a control method, device, storage medium and electronic equipment for denitrification of a unit; when the denitrification flue gas of a generator set is on the denitrification side of the generator set, a first outlet concentration value of the denitrification flue gas on the denitrification A side in the denitrification side and a second outlet concentration value of the denitrification flue gas on the denitrification B side in the denitrification side are obtained; a concentration difference between the first outlet concentration value and the second outlet concentration value is obtained; an expected concentration value corresponding to the concentration difference and an adjustment value corresponding to the concentration difference are determined; according to the expected concentration value and the adjustment value, the outlet concentration of the target denitrification side of the generator set is adjusted; the target denitrification side includes the denitrification A side and / or the denitrification B side; through the above technical scheme, according to the outlet concentration difference between the denitrification A side and the denitrification B side, a corresponding adjustment value is determined, so that the two sides are controlled accordingly, the problem of unbalanced outlet concentration on both sides is avoided, and the stable operation of the unit is ensured; and control logic optimization can be performed on the existing equipment of the unit, reducing the maintenance cost of the equipment.

[0034] Figure 1 FIG. 1 is a flow chart showing a method for controlling denitration of a unit according to an exemplary embodiment. Figure 1 As shown, the method may include the following steps.

[0035] S101. When the denitrification flue gas of the generator set is on the denitrification side of the generator set, obtain a first outlet concentration value of the denitrification flue gas on the denitrification A side of the denitrification side and a second outlet concentration value of the denitrification flue gas on the denitrification B side of the denitrification side.

[0036] For example, the generator set may be a thermal power set; the first outlet concentration value may be the concentration value of nitrogen oxides at the outlet of the denitration A side; and the second outlet concentration value may be the concentration value of nitrogen oxides at the outlet of the denitration B side.

[0037] For example, the denitration A side and the denitration B side may be provided with sensors respectively, and the concentration values ​​of nitrogen oxides in the denitration flue gas of the denitration A side and the denitration B side may be collected by the sensors. For example, the sensor may be a gas concentration sensor, etc., which is not limited here.

[0038] S102: Obtain a concentration difference between the first outlet concentration value and the second outlet concentration value.

[0039] For example, the first outlet concentration value may be subtracted from the second outlet concentration value to obtain the concentration difference value.

[0040] S103: Determine an expected concentration value corresponding to the concentration difference and an adjustment value corresponding to the concentration difference.

[0041] For example, the expected concentration value may be an outlet concentration value to which the denitration A side and / or the denitration B side needs to be adjusted.

[0042] In some embodiments, the above-mentioned determination of the adjustment value corresponding to the concentration difference may include: determining the adjustment value according to the concentration difference through a preset adjustment correspondence relationship; the preset adjustment correspondence relationship includes a correspondence between multiple concentration difference values ​​and multiple adjustment values, each concentration difference value corresponds to an adjustment value; the concentration difference value is positively correlated with the ratio of the adjustment value to the concentration difference value.

[0043] For example, the preset adjustment correspondence may be a correspondence curve between a plurality of concentration difference values ​​and a plurality of adjustment values.

[0044] For example, the concentration difference is proportional to the adjustment value, that is, the larger the concentration difference is, the larger the adjustment value is; the smaller the concentration difference is, the smaller the adjustment value is. The concentration difference is positively correlated with the ratio of the adjustment value to the concentration difference, that is, the larger the concentration difference is, the larger the ratio of the adjustment value to the concentration difference is; the smaller the concentration difference is, the smaller the ratio of the adjustment value to the concentration difference is.

[0045] For example, when the preset adjustment correspondence is a curve, the ratio of the adjustment value to the concentration difference may be the slope of the curve. In this case, the greater the concentration difference, the greater the slope; and the smaller the concentration difference, the smaller the slope.

[0046] S104. Adjust the outlet concentration of the target denitration side of the generator set according to the expected concentration value and the adjustment value.

[0047] Wherein, the target denitrification side may include the denitrification A side and / or the denitrification B side.

[0048] Through the above technical scheme, the corresponding adjustment value is determined according to the difference in outlet concentration between the denitration A side and the denitration B side, so as to control the two sides accordingly, avoid the problem of unbalanced outlet concentration on both sides, and ensure the stable operation of the unit; and the control logic optimization can be carried out on the existing equipment of the unit, reducing the maintenance cost of the equipment.

[0049] Figure 2 is based on Figure 1 The exemplary embodiment of the present invention is a flow chart showing a method for controlling denitration of a unit. Figure 2 As shown, the above S103 may include the following steps.

[0050] S1031. When the denitrification flue gas moves to a main exhaust port of the generator set, a third outlet concentration value of the denitrification flue gas at the main exhaust port is obtained.

[0051] For example, the third outlet concentration value may be the concentration value of nitrogen oxides at the total outlet. The third outlet concentration value may refer to the concentration value when the denitrification flue gas at the denitrification A side and the denitrification B side reaches the total outlet of the generator set after passing through the induced draft fan, desulfurization link, wet electrostatic precipitator and other equipment of the generator set.

[0052] For example, a sensor may be provided at the main outlet, and the sensor may be used to collect the concentration value of nitrogen oxides in the denitrification flue gas at the main outlet. For example, the sensor may be a gas concentration sensor, etc., which is not limited here.

[0053] For example, when the denitrification flue gas is at the denitrification A side and the denitrification B side, the concentration difference between the denitrification A side and the denitrification B side can be obtained; then, the denitrification flue gas moves to the total outlet, and the third outlet concentration value at the total outlet is obtained. Therefore, the third outlet concentration value is a concentration value corresponding to the concentration difference between the denitrification A side and the denitrification B side. In addition, due to the physical distance between different devices of the generator set, the concentration of the denitrification flue gas will change when passing through different devices, so the concentration value at the total outlet is not the same as the concentration value of the denitrification A side and the denitrification B side.

[0054] S1032: Determine a candidate adjustment value according to the third outlet concentration value and a preset proportional coefficient.

[0055] For example, the preset proportionality factor can be set by the user according to the operating conditions of the generator set, which is not limited here.

[0056] For example, the third outlet concentration value may be preprocessed, and the candidate adjustment value may be determined according to the preprocessed third outlet concentration value and a preset proportional coefficient.

[0057] For example, the preprocessing process may be to perform a differential operation on the third outlet concentration value. The candidate adjustment value may be obtained according to the product of the preprocessed third outlet concentration value and a preset proportional coefficient.

[0058] In some embodiments, the concentration hysteresis value may be subjected to proportional differential control to obtain the adjustment value. For example, the method of performing proportional differential control on the parameter has been disclosed in the relevant art and will not be described in detail here.

[0059] S1033: When it is determined that the candidate adjustment value is within the preset threshold range, use the candidate adjustment value as the adjustment value.

[0060] For example, the preset threshold range can be set by the user and is not limited here.

[0061] In some embodiments, the concentration difference may be subjected to proportional differential control to obtain the adjustment value, thereby improving the accuracy of the adjustment value.

[0062] Figure 3 is based on Figure 2 The exemplary embodiment of the present invention is a flow chart showing a method for controlling denitration of a unit. Figure 3 As shown, the target denitration side includes the denitration A side or the denitration B side; the above S104 may include the following steps.

[0063] S1041. Use the difference between the expected concentration value and the adjustment value as the target adjustment value.

[0064] For example, the target adjustment value may be the outlet concentration value that needs to be achieved on the denitration A side or the denitration B side.

[0065] S1042. Determine the valve adjustment amount on the target denitration side according to the target adjustment value.

[0066] For example, the valve adjustment amount of the target denitration side corresponding to the target adjustment value can be determined by a preset corresponding relationship. The preset corresponding relationship can include a corresponding relationship between multiple target adjustment values ​​and multiple valve adjustment amounts; each target adjustment value corresponds to a valve adjustment amount. In this way, the valve adjustment amount can be quickly determined by the preset corresponding relationship, thereby improving work efficiency.

[0067] S1043. According to the valve adjustment amount, adjust the opening of the ammonia injection valve on the target denitration side to adjust the outlet concentration of the target denitration side.

[0068] In this way, by adjusting the opening of the ammonia injection valve on the target denitrification side, the ammonia injection flow rate of the ammonia injection valve can be adjusted, thereby adjusting the concentration value of nitrogen oxides at the outlet of the target denitrification side.

[0069] Figure 4 is based on Figure 2 The exemplary embodiment of the present invention is a flow chart showing another method for controlling denitration of a unit. Figure 4 As shown, the target denitration side includes the denitration A side and the denitration B side; the above S104 may include the following steps.

[0070] S1044. Determine a first target adjustment value corresponding to the first denitration side and a second target adjustment value corresponding to the second denitration side according to the difference between the expected concentration value and the adjustment value.

[0071] Among them, the first denitrification side is the side with a larger outlet concentration value between the denitrification A side and the denitrification B side; the second denitrification side is the side with a smaller outlet concentration value between the denitrification A side and the denitrification B side.

[0072] S1045. Adjust the outlet concentrations of the first denitrification side and the second denitrification side according to the first target adjustment value and the second target adjustment value.

[0073] In some embodiments, the determination of the first target adjustment value corresponding to the first denitrification side and the second target adjustment value corresponding to the second denitrification side according to the difference between the expected concentration value and the adjustment value may include: determining the pending adjustment value according to the difference between the expected concentration value and the adjustment value; determining the average concentration value according to the first outlet concentration value and the second outlet concentration value; determining the first target adjustment value and the second target adjustment value according to the pending adjustment value and the average concentration value. For example, the first outlet concentration value and the second outlet concentration value may be averaged to obtain the average concentration value. In this way, the first target adjustment value and the second target adjustment value may be determined respectively to achieve simultaneous adjustment of the outlet concentrations of the denitrification A side and the denitrification B side.

[0074] In other embodiments, determining the first target adjustment value corresponding to the first denitrification side and the second target adjustment value corresponding to the second denitrification side according to the difference between the expected concentration value and the adjustment value may include: determining the pending adjustment value according to the difference between the expected concentration value and the adjustment value; obtaining the first preset weight value corresponding to the first denitrification side and the second preset weight value corresponding to the second denitrification side; determining the first target adjustment value and the second target adjustment value according to the pending adjustment value, the first preset weight value and the second preset weight value.

[0075] For example, the product of the pending adjustment value and the first preset weight value can be used as the first target adjustment value; and the product of the pending adjustment value and the second preset weight value can be used as the second target adjustment value.

[0076] For example, the first preset weight value is greater than the second preset weight value; the sum of the first preset weight value and the second preset weight value can be a certain value; the values ​​of the first preset weight value and the second preset weight value can be set by the user and are not limited here.

[0077] For example, the sum of the first preset weight value and the second preset weight value may be 1; in this case, the first preset weight value may be 0.6, and the second preset weight value may be 0.4. In this way, the predetermined adjustment value may be allocated by the preset weight value to respectively determine the first target adjustment value and the second target adjustment value, thereby achieving simultaneous adjustment of the outlet concentrations of the denitration A side and the denitration B side.

[0078] In some embodiments, adjusting the outlet concentrations of the first denitrification side and the second denitrification side according to the first target adjustment value and the second target adjustment value may include: determining the first valve adjustment amount of the first denitrification side according to the first target adjustment value; adjusting the opening of the ammonia injection valve of the first denitrification side according to the first valve adjustment amount to reduce the outlet concentration of the first denitrification side; determining the second valve adjustment amount of the second denitrification side according to the second target adjustment value; adjusting the opening of the ammonia injection valve of the second denitrification side according to the second valve adjustment amount to increase the outlet concentration of the second denitrification side. In this way, the outlet concentration of the first denitrification side can be reduced by the first target adjustment value, and the outlet concentration of the second denitrification side can be increased by the second target adjustment value, so as to balance the outlet concentration values ​​on both sides, effectively avoiding the hysteresis of the denitrification system and the occurrence of double-side coupling oscillation, and reducing the system ammonia consumption and ammonia escape.

[0079] In other embodiments, the method may further include: determining a target ammonia injection flow rate according to a preset correction coefficient and a current ammonia injection flow rate of the target denitration side; and adjusting the ammonia injection flow rate of the target denitration side according to the target ammonia injection flow rate. For example, the preset correction coefficient may be a pre-set value, and the range of the preset correction coefficient may be in the range of 0.8-1.2, such as 0.8, 0.85, 1.1 or 1.2, etc., which is not limited here. In this way, the ammonia injection flow rate of the ammonia injection valve on the target denitration side can be directly adjusted to achieve the adjustment of the outlet concentration of the target denitration side.

[0080] The following examples illustrate the case where the target denitration side of the generator set includes the denitration A side or the denitration B side. Figure 5 As shown, the method may include the following steps.

[0081] S501. Obtain a first outlet concentration value of the denitrification flue gas on the denitrification A side of the generator set, and a second outlet concentration value of the denitrification flue gas on the denitrification B side of the generator set.

[0082] S502: Obtain a concentration difference between the first outlet concentration value and the second outlet concentration value.

[0083] S503: Determine the adjustment value according to the concentration difference through a preset adjustment correspondence relationship.

[0084] The preset adjustment correspondence includes a correspondence between a plurality of concentration differences and a plurality of adjustment values, each concentration difference corresponds to an adjustment value; and the concentration difference is positively correlated with a ratio of the adjustment value to the concentration difference.

[0085] S504: Use the difference between the expected concentration value and the adjustment value as the target adjustment value.

[0086] S505. Determine the valve adjustment amount on the target denitration side according to the target adjustment value.

[0087] S506. According to the valve adjustment amount, the opening of the ammonia injection valve on the target denitration side is adjusted to adjust the outlet concentration on the target denitration side.

[0088] Through the above technical scheme, the corresponding adjustment value is determined according to the difference in outlet concentration between the denitration A side and the denitration B side, so as to control the two sides accordingly, avoid the problem of unbalanced outlet concentration on both sides, and ensure the stable operation of the unit; and the control logic optimization can be carried out on the existing equipment of the unit, reducing the maintenance cost of the equipment.

[0089] Figure 6 FIG. 1 is a block diagram of a control device for denitration of a unit according to an exemplary embodiment. Figure 6 As shown, the device 600 may include: a first acquisition module 610, a second acquisition module 620, a determination module 630 and an adjustment module 640; The first acquisition module 610 is used to acquire a first outlet concentration value of the denitrification flue gas on the denitrification A side of the denitrification side, and a second outlet concentration value of the denitrification flue gas on the denitrification B side of the denitrification side, when the denitrification flue gas of the generator set is on the denitrification side of the generator set; The second acquisition module 620 is used to obtain the concentration difference between the first outlet concentration value and the second outlet concentration value; The determination module 630 is used to determine the expected concentration value corresponding to the concentration difference value and the adjustment value corresponding to the concentration difference value; The adjustment module 640 is used to adjust the outlet concentration of the target denitration side of the generator set according to the expected concentration value and the adjustment value; the target denitration side includes the denitration A side and / or the denitration B side.

[0090] Through the above technical scheme, the corresponding adjustment value is determined according to the difference in outlet concentration between the denitration A side and the denitration B side, so as to control the two sides accordingly, avoid the problem of unbalanced outlet concentration on both sides, and ensure the stable operation of the unit; and the control logic optimization can be carried out on the existing equipment of the unit, reducing the maintenance cost of the equipment.

[0091] Optionally, the determination module 630 is used to determine the adjustment value according to the concentration difference through a preset adjustment correspondence; the preset adjustment correspondence includes a correspondence between multiple concentration differences and multiple adjustment values, each concentration difference corresponds to an adjustment value; the concentration difference is positively correlated with the ratio of the adjustment value to the concentration difference.

[0092] Optionally, the determination module 630 is used to obtain a third outlet concentration value of the denitrification flue gas at the total outlet when the denitrification flue gas moves to the total outlet of the generator set; determine a candidate adjustment value based on the third outlet concentration value and a preset proportional coefficient; and when it is determined that the candidate adjustment value is within a preset threshold range, use the candidate adjustment value as the adjustment value.

[0093] Optionally, the target denitrification side includes the denitrification A side or the denitrification B side; the adjustment module 640 is used to take the difference between the expected concentration value and the adjustment value as the target adjustment value; determine the valve adjustment amount of the target denitrification side according to the target adjustment value; adjust the opening of the ammonia injection valve of the target denitrification side according to the valve adjustment amount to adjust the outlet concentration of the target denitrification side.

[0094] Optionally, the target denitrification side includes the denitrification A side and the denitrification B side; the adjustment module 640 is used to determine a first target adjustment value corresponding to the first denitrification side and a second target adjustment value corresponding to the second denitrification side according to the difference between the expected concentration value and the adjustment value; the first denitrification side is the side with a larger outlet concentration value between the denitrification A side and the denitrification B side; the second denitrification side is the side with a smaller outlet concentration value between the denitrification A side and the denitrification B side; according to the first target adjustment value and the second target adjustment value, the outlet concentrations of the first denitrification side and the second denitrification side are adjusted.

[0095] Optionally, the adjustment module 640 is used to determine a pending adjustment value based on the difference between the expected concentration value and the adjustment value; determine an average concentration value based on the first outlet concentration value and the second outlet concentration value; and determine the first target adjustment value and the second target adjustment value based on the pending adjustment value and the average concentration value.

[0096] Optionally, the adjustment module 640 is used to determine a first valve adjustment amount of the first denitrification side according to the first target adjustment value; adjust the opening of the ammonia injection valve of the first denitrification side according to the first valve adjustment amount to reduce the outlet concentration of the first denitrification side; determine a second valve adjustment amount of the second denitrification side according to the second target adjustment value; adjust the opening of the ammonia injection valve of the second denitrification side according to the second valve adjustment amount to increase the outlet concentration of the second denitrification side.

[0097] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0098] In summary, the present disclosure provides a control method, device, storage medium and electronic device for denitrification of a unit; when the denitrification flue gas of a generator set is on the denitrification side of the generator set, a first outlet concentration value of the denitrification flue gas on the denitrification A side in the denitrification side and a second outlet concentration value of the denitrification flue gas on the denitrification B side in the denitrification side are obtained; a concentration difference between the first outlet concentration value and the second outlet concentration value is obtained; an expected concentration value corresponding to the concentration difference and an adjustment value corresponding to the concentration difference are determined; according to the expected concentration value and the adjustment value, the outlet concentration of the target denitrification side of the generator set is adjusted; the target denitrification side includes the denitrification A side and / or the denitrification B side; through the above technical scheme, according to the outlet concentration difference between the denitrification A side and the denitrification B side, a corresponding adjustment value is determined, so that the two sides are controlled accordingly, the problem of unbalanced outlet concentration on both sides is avoided, and the stable operation of the unit is ensured; and control logic optimization can be performed on the existing equipment of the unit, reducing the maintenance cost of the equipment.

[0099] Figure 7 is a block diagram of an electronic device 700 according to an exemplary embodiment. For example, the electronic device 700 may be provided as a server. Figure 7 The electronic device 700 includes a processor 722, which may be one or more, and a memory 732 for storing a computer program executable by the processor 722. The computer program stored in the memory 732 may include one or more modules, each corresponding to a set of instructions. In addition, the processor 722 may be configured to execute the computer program to perform the above-mentioned control method for unit denitration.

[0100] In addition, the electronic device 700 may further include a power supply component 726 and a communication component 750, wherein the power supply component 726 may be configured to perform power management of the electronic device 700, and the communication component 750 may be configured to implement communication, for example, wired or wireless communication, of the electronic device 700. In addition, the electronic device 700 may further include an input / output interface 758. The electronic device 700 may operate based on an operating system stored in the memory 732.

[0101] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned unit denitration control method are implemented. For example, the non-transitory computer-readable storage medium can be the above-mentioned memory 732 including program instructions, and the above-mentioned program instructions can be executed by the processor 722 of the electronic device 700 to complete the above-mentioned unit denitration control method.

[0102] In another exemplary embodiment, a computer program product is also provided, which includes a computer program that can be executed by a programmable device, and the computer program has a code portion for executing the above-mentioned control method for denitrification of the unit when executed by the programmable device.

[0103] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0104] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0105] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A method for controlling denitration of a unit, characterized in that: The method comprises: In the case where the denitration flue gas of the generator set is at the denitration side of the generator set, obtaining a first outlet concentration value of the denitration flue gas at the denitration A side of the denitration side, and a second outlet concentration value of the denitration flue gas at the denitration B side of the denitration side; Obtaining a concentration difference between the first outlet concentration value and the second outlet concentration value; Determining an expected concentration value corresponding to the concentration difference; According to the concentration difference, an adjustment value corresponding to the concentration difference is determined by a preset adjustment correspondence relationship; the preset adjustment correspondence relationship includes a correspondence relationship between multiple concentration differences and multiple adjustment values, each concentration difference corresponds to an adjustment value; the concentration difference is positively correlated with a ratio of the adjustment value to the concentration difference; According to the expected concentration value and the adjustment value, the outlet concentration of the target denitration side of the generator set is adjusted; the target denitration side includes the denitration A side and / or the denitration B side.

2. The method according to claim 1, characterized in that The method further comprises: When the denitrification flue gas moves to the main exhaust port of the generator set, obtaining a third outlet concentration value of the denitrification flue gas at the main exhaust port; Determining a candidate adjustment value according to the third outlet concentration value and a preset proportional coefficient; When it is determined that the candidate adjustment value is within the preset threshold range, the candidate adjustment value is used as the adjustment value corresponding to the density difference value.

3. The method according to claim 1, characterized in that The target denitration side includes the denitration A side or the denitration B side; and adjusting the outlet concentration of the target denitration side of the generator set according to the expected concentration value and the adjustment value includes: Taking the difference between the expected concentration value and the adjustment value as the target adjustment value; Determining a valve adjustment amount on the target denitration side according to the target adjustment value; According to the valve adjustment amount, the opening of the ammonia injection valve on the target denitration side is adjusted to adjust the outlet concentration on the target denitration side.

4. The method according to claim 1, characterized in that: The target denitration side includes the denitration A side and the denitration B side; and adjusting the outlet concentration of the target denitration side of the generator set according to the expected concentration value and the adjustment value includes: According to the difference between the expected concentration value and the adjustment value, determine a first target adjustment value corresponding to the first denitration side and a second target adjustment value corresponding to the second denitration side; the first denitration side is the side with a larger outlet concentration value between the denitration A side and the denitration B side; the second denitration side is the side with a smaller outlet concentration value between the denitration A side and the denitration B side; The outlet concentrations of the first denitration side and the second denitration side are adjusted according to the first target adjustment value and the second target adjustment value.

5. The method according to claim 4, characterized in that Determining a first target adjustment value corresponding to the first denitration side and a second target adjustment value corresponding to the second denitration side according to the difference between the expected concentration value and the adjustment value includes: Determining a pending adjustment value according to a difference between the expected concentration value and the adjustment value; Determining a concentration average value according to the first outlet concentration value and the second outlet concentration value; The first target adjustment value and the second target adjustment value are determined according to the pending adjustment value and the average concentration value.

6. The method according to claim 4, characterized in that Determining a first target adjustment value corresponding to the first denitration side and a second target adjustment value corresponding to the second denitration side according to the difference between the expected concentration value and the adjustment value includes: Determining a pending adjustment value according to a difference between the expected concentration value and the adjustment value; Acquire a first preset weight value corresponding to the first denitration side, and a second preset weight value corresponding to the second denitration side; The first target adjustment value and the second target adjustment value are determined according to the pending adjustment value, the first preset weight value and the second preset weight value.

7. The method according to claim 4, characterized in that The step of adjusting the outlet concentrations of the first denitration side and the second denitration side according to the first target adjustment value and the second target adjustment value comprises: determining a first valve adjustment amount on the first denitration side according to the first target adjustment value; According to the first valve adjustment amount, adjusting the opening of the ammonia injection valve on the first denitration side to reduce the outlet concentration of the first denitration side; determining a second valve adjustment amount at the second denitration side according to the second target adjustment value; According to the adjustment amount of the second valve, the opening of the ammonia injection valve on the second denitrification side is adjusted to increase the outlet concentration on the second denitrification side.

8. A control device for denitration of a unit, characterized in that: The device comprises: A first acquisition module is used to acquire, when the denitration flue gas of the generator set is at the denitration side of the generator set, a first outlet concentration value of the denitration flue gas on the denitration A side of the denitration side, and a second outlet concentration value of the denitration flue gas on the denitration B side of the denitration side; A second acquisition module, used to acquire a concentration difference between the first outlet concentration value and the second outlet concentration value; A determination module, configured to determine an expected concentration value corresponding to the concentration difference; determine an adjustment value corresponding to the concentration difference according to the concentration difference through a preset adjustment correspondence relationship; the preset adjustment correspondence relationship includes a correspondence relationship between a plurality of concentration differences and a plurality of adjustment values, each concentration difference corresponds to an adjustment value; the concentration difference is positively correlated with a ratio of the adjustment value to the concentration difference; An adjustment module is used to adjust the outlet concentration of the target denitration side of the generator set according to the expected concentration value and the adjustment value; the target denitration side includes the denitration A side and / or the denitration B side.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method described in any one of claims 1 to 7 are implemented.

10. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 7.

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