Control Method, Device and Actuator for Pulverized Coal Combustion Stability

Abstract

The present application discloses a control method, device and actuator for the combustion stability of pulverized coal. First, combustion data of the pulverized coal combustion is obtained, and a stability quantitative parameter is calculated based on the combustion data; then, a first magnitude relationship between the stability quantitative parameter and a first stability parameter, a second magnitude relationship between the stability quantitative parameter and a second stability parameter, and a time interval between the current moment and the moment of the last adjustment are determined; finally, it is judged whether the first magnitude relationship, the second magnitude relationship and the time interval meet the adjustment conditions. If the first magnitude relationship, the second magnitude relationship and the time interval meet the adjustment conditions, the combustion stability of the pulverized coal is improved. Determining whether to improve the combustion stability of the pulverized coal based on these three dimensions of the first magnitude relationship, the second magnitude relationship and the time interval can improve the accuracy of triggering the increase in the combustion stability of the pulverized coal and can avoid over-adjustment or delayed adjustment.

Description

Technical Field

[0001] The present application relates to the field of control technology, and particularly to a control method, device, and actuator for the combustion stability of pulverized coal. Background Art

[0002] A thermal power generating unit includes a burner for burning pulverized coal. The burner is used to feed the pulverized coal into the furnace so that the pulverized coal absorbs heat and burns after entering the furnace. The pulverized coal burns after leaving the burner outlet. When the thermal power generating unit operates at a low load, the combustion stability of the pulverized coal at the burner outlet deteriorates, affecting the operation of the thermal power generating unit.

[0003] Currently, it is difficult to accurately control the combustion stability of the burner. Summary of the Invention

[0004] In view of this, the present application provides a control method, device, and actuator for the combustion stability of pulverized coal, which can accurately adjust the combustion stability of the burner.

[0005] To solve the above problems, the technical solutions provided by the present application are as follows:

[0006] In a first aspect, the present application provides a control method for the combustion stability of pulverized coal, the method comprising:

[0007] Obtaining combustion data of the pulverized coal combustion;

[0008] Calculating a stability quantitative parameter based on the combustion data;

[0009] Determining a first magnitude relationship between the stability quantitative parameter and a first stability parameter, a second magnitude relationship between the stability quantitative parameter and a second stability parameter, and a time interval between the current moment and the moment of the last adjustment, where the first stability parameter is an index parameter and the second stability parameter is a preset parameter for dividing a stable interval;

[0010] If the first magnitude relationship, the second magnitude relationship, and the time interval satisfy an adjustment condition, improving the combustion stability of the pulverized coal, where the adjustment condition includes that the first magnitude relationship is that the stability quantitative parameter is less than the first stability parameter, the second magnitude relationship is that the stability quantitative parameter is less than the second stability parameter, and the time interval is greater than a preset interval.

[0011] In a possible implementation manner, the method further comprises:

[0012] If the first size relationship, the second size relationship, or the time interval satisfies the non-adjustment condition, the stability of the pulverized coal combustion is not adjusted. The non-adjustment condition includes that the first size relationship is that the stability quantitative parameter is greater than the first stability parameter, the second size relationship is that the stability quantitative parameter is greater than or equal to the second stability parameter, and the time interval is less than or equal to a preset interval, or one or more of them.

[0013] In a possible implementation, improving the stability of the pulverized coal combustion includes:

[0014] Generating an adjustment instruction;

[0015] Sending the adjustment instruction to an execution device, where the execution device is used to adjust the stability of the pulverized coal combustion.

[0016] In a possible implementation, the adjustment instruction includes an action amplitude, and the action amplitude is a linear function value or a piecewise linear function value of the difference between the stability quantitative parameter and the first stability parameter and a base amplitude, or the action amplitude is the product of the difference between the stability quantitative parameter and the first stability parameter, the base amplitude, and an adjustment coefficient.

[0017] In a possible implementation, the adjustment instruction includes adjustment items, and the adjustment items include one or more of pulverized coal fineness, primary air temperature, secondary air temperature, primary air velocity, secondary air velocity, pulverized coal amount, and the swirler blade angle of the burner.

[0018] In a possible implementation, obtaining the combustion data of the pulverized coal combustion includes:

[0019] Obtaining the combustion data of the pulverized coal combustion through a collection device, where the collection device is used to collect the combustion data of the pulverized coal combustion at the outlet of the pulverized coal burner.

[0020] In a possible implementation, the collection device includes one or more of a flame detection collector, a sound collector, a micro-pressure collector, and a video collector.

[0021] In a second aspect, the present application provides a control device for the stability of pulverized coal combustion, and the device includes:

[0022] An acquisition unit, configured to acquire the combustion data of the pulverized coal combustion;

[0023] A calculation unit, configured to calculate a stability quantitative parameter based on the combustion data;

[0024] A determination unit, configured to determine a first magnitude relationship between the stability quantitative parameter and a first stability parameter, a second magnitude relationship between the stability quantitative parameter and a second stability parameter, and a time interval between the current moment and the moment of the last adjustment. The first stability parameter is an index parameter, and the second stability parameter is a preset parameter for dividing a stable interval.

[0025] An execution unit, configured to improve the stability of the pulverized coal combustion if the first magnitude relationship, the second magnitude relationship, and the time interval satisfy an adjustment condition. The adjustment condition includes that the first magnitude relationship is that the stability quantitative parameter is less than the first stability parameter, the second magnitude relationship is that the stability quantitative parameter is less than the second stability parameter, and the time interval is greater than a preset interval.

[0026] In a possible implementation manner, the execution unit is further configured to not adjust the stability of the pulverized coal combustion if the first magnitude relationship, the second magnitude relationship, or the time interval satisfies a non-adjustment condition. The non-adjustment condition includes that the first magnitude relationship is that the stability quantitative parameter is greater than the first stability parameter, the second magnitude relationship is that the stability quantitative parameter is greater than or equal to the second stability parameter, and the time interval is less than or equal to the preset interval, one or more of which.

[0027] In a possible implementation manner, the execution unit for improving the stability of the pulverized coal combustion includes:

[0028] The execution unit is configured to generate an adjustment instruction; send the adjustment instruction to an execution device, and the execution device is configured to adjust the stability of the pulverized coal combustion.

[0029] In a possible implementation manner, the adjustment instruction includes an action amplitude, and the action amplitude is a linear function value or a piecewise linear function value of the difference between the stability quantitative parameter and the first stability parameter and a base amplitude, or the action amplitude is the product of the difference between the stability quantitative parameter and the first stability parameter, the base amplitude, and an adjustment coefficient.

[0030] In a possible implementation manner, the adjustment instruction includes adjustment items, and the adjustment items include one or more of pulverized coal fineness, primary air temperature, secondary air temperature, primary air velocity, secondary air velocity, pulverized coal amount, and the swirler vane angle of the burner.

[0031] In a possible implementation manner, the acquisition unit is configured to acquire combustion data of the pulverized coal combustion through an acquisition device, and the acquisition device is configured to acquire combustion data of the pulverized coal combustion at the outlet of the pulverized coal burner.

[0032] In a possible implementation, the acquisition device includes one or more of a flame detection collector, a sound collector, a micro-pressure collector, and a video collector.

[0033] In a third aspect, the present application provides an actuator for the stability of pulverized coal combustion, including: a processor, a memory, and a system bus;

[0034] The processor and the memory are connected through the system bus;

[0035] The memory is used to store one or more programs, and the one or more programs include instructions that, when executed by the processor, cause the processor to execute the method according to any possible implementation of the first aspect.

[0036] In a fourth aspect, the present application provides a computer-readable storage medium storing instructions that, when run on a terminal device, cause the terminal device to execute the method according to any possible implementation of the first aspect.

[0037] Thus, the present application has the following beneficial effects:

[0038] The control method, device, and actuator for the stability of pulverized coal combustion provided by the present application first obtain the combustion data of pulverized coal combustion and calculate the stability quantitative parameter based on the combustion data; then determine the first magnitude relationship between the stability quantitative parameter and the first stability parameter, the second magnitude relationship between the stability quantitative parameter and the second stability parameter, and the time interval between the current moment and the moment of the last adjustment; finally, determine whether the first magnitude relationship, the second magnitude relationship, and the time interval meet the adjustment conditions. If the first magnitude relationship, the second magnitude relationship, and the time interval meet the adjustment conditions, the stability of the pulverized coal combustion is improved. Among them, the first stability parameter is an index parameter, and the second stability parameter is a preset parameter for dividing the stable interval. Determining whether to improve the stability of pulverized coal combustion based on the three dimensions of the first magnitude relationship, the second magnitude relationship, and the time interval can improve the accuracy of triggering the increase in the stability of pulverized coal combustion and avoid over-adjustment or delayed adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A flowchart of a control method for the stability of pulverized coal combustion provided by an embodiment of the present application;

[0040] Figure 2 A schematic connection structure diagram of a burner and a coal mill provided by an embodiment of the present application;

[0041] Figure 3Schematic structural diagram of a control device for pulverized coal combustion stability provided by an embodiment of the present application. Detailed implementation manners

[0042] To facilitate the understanding and explanation of the technical solutions provided by the embodiments of the present application, the background technology of the present application will be described first.

[0043] A thermal power generating unit includes a burner for burning pulverized coal. The pulverized coal burns in the burner. However, during the operation of the thermal power generating unit, a low-load operation state may occur. During low-load operation, the combustion stability of the pulverized coal at the burner outlet deteriorates, resulting in a low efficiency of converting the energy of the burned pulverized coal. In some implementation manners, the management personnel of the thermal power generating unit can make adjustments based on experience, but it is difficult to achieve relatively accurate adjustments. In some other implementation manners, the automatic control system of the thermal power generator controls the burner. However, the automatic control system adjusts the burner relatively frequently, affecting the reliability of the actuator for adjustment.

[0044] Based on this, the embodiments of the present application provide a control method, device, and actuator for pulverized coal combustion stability. First, combustion data of pulverized coal combustion is obtained, and a stability quantitative parameter is calculated based on the combustion data; then, a first magnitude relationship between the stability quantitative parameter and a first stability parameter, a second magnitude relationship between the stability quantitative parameter and a second stability parameter, and a time interval between the current moment and the moment of the previous adjustment are determined; finally, it is judged whether the first magnitude relationship, the second magnitude relationship, and the time interval meet the adjustment conditions. If the first magnitude relationship, the second magnitude relationship, and the time interval meet the adjustment conditions, the combustion stability of the pulverized coal is improved. Among them, the first stability parameter is an index parameter, and the second stability parameter is a preset parameter for dividing the stable interval. Determining whether to improve the combustion stability of pulverized coal based on these three dimensions of the first magnitude relationship, the second magnitude relationship, and the time interval can improve the accuracy of triggering an increase in the combustion stability of pulverized coal and can avoid over-adjustment or delayed adjustment.

[0045] To facilitate the understanding of the technical solutions provided by the embodiments of the present application, the control method for pulverized coal combustion stability provided by the embodiments of the present application will be described below with reference to the accompanying drawings.

[0046] First, the application scenario of a control method for pulverized coal combustion stability provided by the embodiments of the present application will be described. This control method for pulverized coal combustion stability can be applied to the actuator of a burner for burning pulverized coal. The actuator can be, for example, the combustion control system of a thermal power generating unit.

[0047] See Figure 1As shown in the figure, it is a schematic flowchart of a method for controlling the combustion stability of pulverized coal provided by an embodiment of the present application. This method includes S101 - S104.

[0048] S101: Obtain the combustion data of pulverized coal combustion.

[0049] During the combustion of pulverized coal, obtain the combustion data of pulverized coal combustion. The combustion data is data used to measure the degree of pulverized coal combustion. As an example, the combustion data includes one or more of flame image data, combustion sound data, burner pressure value, and combustion video data.

[0050] The embodiment of the present application does not limit the method for obtaining the combustion data. In one possible implementation, the combustion data can be obtained from a detection system that monitors the burner. In another possible implementation, a collection device is configured near the burner. The collection device is electrically connected to the actuator. The collection device can obtain the combustion data and transmit the collected combustion data to the actuator.

[0051] As an example, the collection device includes one or more of a flame detection acquisition card, a sound acquisition card, a micro - pressure acquisition card, and a video acquisition card. The actuator includes a signal acquisition card. The signal acquisition card is used to obtain the combustion data generated by the collection device. Among them, the signal acquisition card can include a current signal acquisition card and a multi - channel video acquisition card. The current signal acquisition card can receive the combustion data generated by the flame detection acquisition card, the sound acquisition card, or the micro - pressure acquisition card. The multi - channel video acquisition card can receive the combustion data generated by the video acquisition card.

[0052] See Figure 2 As shown in the figure, it is a schematic structural diagram of a burner provided by an embodiment of the present application. The burner is connected to a coal mill. The coal mill is used to generate pulverized coal and adjust the fineness of the pulverized coal. The burner is configured with a swirl vane. The swirl vane is an adjustment component in the burner that can adjust the swirl intensity of the primary air (pulverized coal and air), thereby affecting the combustion stability. The secondary air damper is used to supplement the air required for the continuous combustion of pulverized coal when the air in the primary air is not sufficient to allow the pulverized coal to burn fully, thereby affecting the combustion stability. The collection device can be installed near the burner, coaxially with the burner, or form a small angle with the burner. The collection device can collect the combustion data in real - time or collect the combustion data according to a preset period.

[0053] S102: Calculate the stability quantitative parameter based on the combustion data.

[0054] Based on the obtained combustion data, a quantitative stability parameter can be calculated. The quantitative stability parameter can measure the stability of pulverized coal combustion. The embodiments of the present application do not limit the specific calculation method for calculating the quantitative stability parameter, and those skilled in the art can calculate it based on the combustion data as needed.

[0055] In a possible implementation, the actuator includes a calculation unit that can calculate the quantitative stability parameter according to the type of combustion data and the calculation algorithm for calculating the quantitative stability parameter corresponding to the type of combustion data preset.

[0056] It should be noted that the embodiments of the present application do not limit the moment when the quantitative stability parameter is calculated. In a possible implementation, the combustion data is obtained according to the acquisition period. After obtaining the combustion data, the calculation of the quantitative stability parameter is triggered. In another possible implementation, the combustion data is obtained in real time. The quantitative stability parameter is calculated in real time according to the combustion data. In still another possible implementation, the quantitative stability parameter is calculated according to a preset calculation period.

[0057] S103: Determine the first magnitude relationship between the quantitative stability parameter and the first stability parameter, the second magnitude relationship between the quantitative stability parameter and the second stability parameter, and the time interval between the current moment and the moment of the previous adjustment.

[0058] After obtaining the quantitative stability parameter, determine the magnitude relationships between the quantitative stability parameter and the first stability parameter and the second stability parameter respectively, to obtain the first magnitude relationship and the second magnitude relationship.

[0059] Among them, the first stability parameter is an index parameter. The first stability parameter is used to measure whether the pulverized coal combustion is stable. If the quantitative stability parameter is greater than the first stability parameter, it indicates that the pulverized coal combustion is in a stable state. If the quantitative stability parameter is less than the first stability parameter, it indicates that the pulverized coal combustion is in an unstable state.

[0060] The second stability parameter is the preset minimum stable parameter. The second stability parameter is a preset parameter for dividing the stable interval and the non-stable interval. The second stability parameter can be pre-set by the staff based on the needs of pulverized coal combustion. The second stability parameter is the minimum value of the quantitative stability parameter in the stable interval. If the calculated quantitative stability parameter is greater than the second stability parameter, it indicates that it is in the stable interval and the combustion state of the pulverized coal is good. If the calculated quantitative stability parameter is less than the second stability parameter, it indicates that it is in the non-stable interval and the combustion state of the pulverized coal is poor. It should be noted that the second stability parameter can be pre-set based on the first stability parameter. The second stability parameter is greater than or equal to the first stability parameter.

[0061] In addition to determining the first magnitude relationship and the second magnitude relationship, the time interval between the current moment and the moment of the last adjustment is also determined. The current moment refers to the moment when the stability quantitative parameter is calculated. The moment of the last adjustment refers to the moment when the stability of pulverized coal combustion was last adjusted.

[0062] S104: If the first magnitude relationship, the second magnitude relationship, and the time interval satisfy the adjustment condition, improve the stability of the pulverized coal combustion.

[0063] The adjustment condition is the condition for triggering an improvement in the stability of pulverized coal combustion. The adjustment condition includes that the first magnitude relationship is that the stability quantitative parameter is less than the first stability parameter, the second magnitude relationship is that the stability quantitative parameter is less than the second stability parameter, and the time interval is greater than the preset interval.

[0064] Among them, the first magnitude relationship that the stability quantitative parameter is less than the first stability parameter means that the pulverized coal combustion is in an unstable state. The second magnitude relationship that the stability quantitative parameter is less than the second stability parameter means that the pulverized coal combustion is not in the stable interval, that is, the non-stable interval. The time interval being greater than the preset interval means that the time interval since the last adjustment is relatively long. When the adjustment condition is met, it indicates that the pulverized coal combustion is not in the stable interval, the pulverized coal combustion is in an unstable state, and the time since the last adjustment has exceeded the preset interval.

[0065] The embodiments of the present application do not limit the storage method of the adjustment condition. In a possible implementation manner, the adjustment condition is stored in the control rule database.

[0066] After determining that the adjustment condition is met, the stability of the pulverized coal combustion is improved. The embodiments of the present application do not limit the specific implementation manner of improving the stability of the pulverized coal combustion. In a possible implementation manner, the pulverized coal burns in the burner. Controlling one or more of improving the fineness of the pulverized coal input into the burner, increasing the primary air temperature and secondary air temperature of the burner, adjusting the primary air velocity and secondary air velocity of the burner, adjusting the angle of the swirl vane of the burner, and adding a combustion improver can achieve an improvement in the stability of the pulverized coal combustion at the outlet of the burner.

[0067] In a possible implementation manner, the actuator for implementing the control method of the stability of pulverized coal combustion is connected to the execution device. The embodiments of the present application provide a specific implementation manner for improving the stability of the pulverized coal combustion, including the following steps:

[0068] A1: Generate an adjustment instruction.

[0069] When the adjustment condition is met, an adjustment instruction is generated. The adjustment instruction is used to trigger the execution device to control the process of pulverized coal combustion to improve the stability of the pulverized coal combustion.

[0070] Among them, the actuator is used to adjust the stability of the pulverized coal combustion. The actuator can be a pneumatic or electric actuator. As an example, the pulverized coal burns in the burner. Taking Figure 2 the burner shown as an example, the actuator can include one or more of a pulverized coal fineness regulator, a swirl vane angle controller, a secondary air volume controller, a primary air temperature controller, a secondary air temperature controller, a pulverized coal input amount controller, and a combustion improver input controller.

[0071] The embodiments of the present application do not limit the specific content included in the adjustment instruction. In a possible implementation manner, the adjustment instruction includes one or more of an action amplitude and an adjustment item.

[0072] The action amplitude is the amplitude of the adjustment action executed by the actuator. The embodiments of the present application do not limit the specific implementation manner of determining the action amplitude. In a possible implementation manner, the action amplitude is a linear function value or a piecewise linear function value of the difference between the stability quantitative parameter and the first stability parameter and the base amplitude. Among them, the base amplitude is the unit amplitude of the adjustment action executed by the actuator. The base amplitude can be determined based on the type of the actuator. For example, the actuator includes a pulverized coal fineness regulator. The base amplitude is the amplitude of the unit adjustment of the pulverized coal fineness regulator. The linear function or the piecewise linear function can be a function based on a preset. In another possible implementation manner, the action amplitude is the product of the difference between the stability quantitative parameter and the first stability parameter, the base amplitude, and an adjustment coefficient. The adjustment coefficient can be a parameter preset for adjusting the action amplitude. By using the adjustment coefficient, more accurate control of the actuator can be achieved. As an example, the adjustment instruction output by the actuator will be transmitted to the actuator after being processed by a pre-configured speed limit process and amplitude limit process. Based on the speed limit process and the amplitude limit process, the adjustment instruction output by the actuator can be restricted and controlled to avoid over-control. In such implementation manners, the value of the adjustment coefficient is greater than 1. By using the adjustment coefficient, the action amplitude can be appropriately amplified, and more accurate control can still be achieved after the speed limit process and the amplitude limit process.

[0073] The adjustment items include one or more of pulverized coal fineness, primary air temperature, secondary air temperature, primary air velocity, secondary air velocity, pulverized coal amount, the swirl vane angle of the burner, and combustion improver. Based on the adjustment items included in the adjustment instruction, the actuator can control the corresponding items to improve the stability of the pulverized coal combustion.

[0074] It should be noted that the action amplitude and the adjustment items included in the adjustment instruction correspond to the type of the actuator. For example, the actuator includes a pulverized coal fineness regulator. The action amplitude included in the adjustment instruction includes the action amplitude for the pulverized coal fineness. The adjustment items included in the adjustment instruction include the pulverized coal fineness.

[0075] In a possible implementation, the actuator for implementing the control method of pulverized coal combustion stability includes a programmable logic controller (PLC). The PLC generates an adjustment instruction.

[0076] A2: Send the adjustment instruction to the actuator, and the actuator is used to adjust the stability of the pulverized coal combustion.

[0077] After generating the adjustment instruction, send the adjustment instruction to the actuator so that the actuator can improve the stability of the pulverized coal combustion based on the adjustment instruction. In a possible implementation, the actuator for implementing the control method of pulverized coal combustion stability includes a digital-to-analog converter. The digital-to-analog converter is used to perform digital-to-analog conversion on the generated adjustment instruction and send the converted adjustment instruction to the actuator so that the actuator can control the stability of the pulverized coal combustion based on the converted adjustment instruction.

[0078] Based on the relevant content of S101 - S104 above, it can be known that the improvement of the stability of pulverized coal combustion can be automatically triggered when the adjustment conditions are met in three dimensions: the first magnitude relationship, the second magnitude relationship, and the time interval. In this way, the accuracy of increasing the stability of pulverized coal combustion can be improved. Based on the two dimensions of the first magnitude relationship and the second magnitude relationship, the state of the stability of pulverized coal combustion can be well determined, and relatively accurate control of the stability of pulverized coal combustion can be achieved. Based on the dimension of the time interval, frequent over-control of the stability of pulverized coal combustion can be avoided, the pressure on the actuator can be relieved, and the probability of failures of the actuator and the equipment burning pulverized coal can be reduced. Moreover, the operation difficulty of the staff can be reduced, and the stable combustion ability of the equipment for pulverized coal combustion can be fully exerted.

[0079] In some possible implementations, when the first magnitude relationship, the second magnitude relationship, or the time interval does not meet the non-adjustment conditions, the stability of the pulverized coal combustion is not adjusted.

[0080] Among them, the non-adjustment conditions include one or more of the first magnitude relationship being that the stability quantitative parameter is greater than the first stability parameter, the second magnitude relationship being that the stability quantitative parameter is greater than or equal to the second stability parameter, and the time interval being less than or equal to the preset interval.

[0081] The first magnitude relationship being that the stability quantitative parameter is greater than the first stability parameter indicates that the pulverized coal combustion is in a stable state, the pulverized coal combustion state is relatively good, and no adjustment is required.

[0082] The second magnitude relationship being that the stability quantitative parameter is greater than or equal to the second stability parameter indicates that the pulverized coal combustion is in a stable range, the pulverized coal combustion state is good, and no adjustment is required.

[0083] The time interval is less than or equal to the preset interval, indicating that the time since the last adjustment of the stability of pulverized coal combustion is short, and there is no need for frequent adjustment.

[0084] As some examples, three specific implementation methods of non-adjustment conditions are provided below.

[0085] The first one: The second size relationship is that the stability quantitative parameter is greater than or equal to the second stability parameter.

[0086] When the stability quantitative parameter is greater than or equal to the second stability parameter, it indicates that the pulverized coal combustion is in a stable range, and the pulverized coal combustion state is relatively good. It does not meet the second size relationship in the adjustment condition that the stability quantitative parameter is less than the second stability parameter, and no adjustment is required.

[0087] The second one: The second size relationship is that the stability quantitative parameter is less than the second stability parameter, and the time interval is less than or equal to the preset interval.

[0088] When the stability quantitative parameter is less than the second stability parameter, it indicates that the pulverized coal combustion is in an unstable range, and the pulverized coal combustion state is poor, and adjustment is required. However, the time interval is less than or equal to the preset interval, which means that the time since the last adjustment of the stability of pulverized coal combustion is short. If adjustment is carried out, the adjustment frequency is too high, which is likely to cause failures in the burner or other related devices. Therefore, when the time interval is less than or equal to the preset interval and does not meet the condition in the adjustment condition that the time interval is greater than the preset interval, the pulverized coal combustion is not adjusted.

[0089] The third one: The first size relationship is that the stability quantitative parameter is greater than the first stability parameter, and the second size relationship is that the stability quantitative parameter is less than the second stability parameter.

[0090] When the stability quantitative parameter is less than the second stability parameter, it indicates that the pulverized coal combustion is in an unstable range, and the pulverized coal combustion state is poor, and adjustment is required. However, the first size relationship is that the stability quantitative parameter is greater than the first stability parameter, indicating that the pulverized coal combustion is in a stable state. Although the pulverized coal combustion is not in a stable range, the state of the pulverized coal combustion is acceptable and does not meet the first size relationship in the adjustment condition that the stability quantitative parameter is less than the first stability parameter, and no adjustment is required.

[0091] Based on the control method for the stability of pulverized coal combustion provided in the above method embodiments, the embodiments of the present application also provide a control device for the stability of pulverized coal combustion. The control device for the stability of pulverized coal combustion will be described below with reference to the accompanying drawings.

[0092] See Figure 3 , this figure is a schematic structural diagram of a control device for the stability of pulverized coal combustion provided by the embodiments of the present application. As Figure 3As shown in the figure, the control device for the stability of pulverized coal combustion includes:

[0093] An acquisition unit 301, configured to acquire combustion data of pulverized coal combustion;

[0094] A calculation unit 302, configured to calculate a stability quantitative parameter based on the combustion data;

[0095] A determination unit 303, configured to determine a first magnitude relationship between the stability quantitative parameter and a first stability parameter, a second magnitude relationship between the stability quantitative parameter and a second stability parameter, and a time interval between the current moment and the moment of the previous adjustment, where the first stability parameter is an index parameter, and the second stability parameter is a preset parameter for dividing a stable interval;

[0096] An execution unit 304, configured to improve the stability of the pulverized coal combustion if the first magnitude relationship, the second magnitude relationship, and the time interval satisfy an adjustment condition, where the adjustment condition includes that the first magnitude relationship is that the stability quantitative parameter is less than the first stability parameter, the second magnitude relationship is that the stability quantitative parameter is less than the second stability parameter, and the time interval is greater than a preset interval.

[0097] In a possible implementation manner, the execution unit 304 is further configured to not adjust the stability of the pulverized coal combustion if the first magnitude relationship, the second magnitude relationship, or the time interval satisfies a non-adjustment condition, where the non-adjustment condition includes that the first magnitude relationship is that the stability quantitative parameter is greater than the first stability parameter, the second magnitude relationship is that the stability quantitative parameter is greater than or equal to the second stability parameter, and the time interval is less than or equal to a preset interval, one or more of which.

[0098] In a possible implementation manner, the execution unit 304 is configured to improve the stability of the pulverized coal combustion, including:

[0099] The execution unit 304 is configured to generate an adjustment instruction; send the adjustment instruction to an execution device, and the execution device is configured to adjust the stability of the pulverized coal combustion.

[0100] In a possible implementation manner, the adjustment instruction includes an action amplitude, and the action amplitude is a linear function value or a piecewise linear function value of the difference between the stability quantitative parameter and the first stability parameter and a base amplitude, or the action amplitude is the product of the difference between the stability quantitative parameter and the first stability parameter, the base amplitude, and an adjustment coefficient.

[0101] In a possible implementation, the adjustment instruction includes adjustment items, and the adjustment items include one or more of fineness of pulverized coal, primary air temperature, secondary air temperature, primary air velocity, secondary air velocity, amount of pulverized coal, and the angle of the swirler vane of the burner.

[0102] In a possible implementation, the obtaining unit 301 is configured to obtain combustion data of pulverized coal combustion through a collection device, and the collection device is used to collect combustion data of pulverized coal combustion at the outlet of the pulverized coal burner.

[0103] In a possible implementation, the collection device includes one or more of a flame detection collector, a sound collector, a micro-pressure collector, and a video collector.

[0104] Based on the control method for the stability of pulverized coal combustion provided in the above method embodiment, the embodiment of the present application further provides an actuator for the stability of pulverized coal combustion, including: a processor, a memory, and a system bus;

[0105] The processor and the memory are connected through the system bus;

[0106] The memory is used to store one or more programs, and the one or more programs include instructions, and when the instructions are executed by the processor, the processor is caused to execute the control method for the stability of pulverized coal combustion described in any one of the above embodiments.

[0107] Based on the control method for the stability of pulverized coal combustion provided in the above method embodiment, the present application provides a computer-readable storage medium, in which instructions are stored, and when the instructions run on a terminal device, the terminal device is caused to execute the control method for the stability of pulverized coal combustion described in any one of the above embodiments.

[0108] It should be noted that the various embodiments in this specification are described in a progressive manner, and the key point of each embodiment is the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0109] It should be understood that in this application, "at least one (item)" means one or more, and "a plurality" means two or more. "And / or" is used to describe the association relationship of associated objects and indicates that three relationships can exist. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist at the same time. Among them, A and B can be singular or plural. The character " / " generally means that the associated objects before and after are in an "or" relationship. "At least one (item) of the following" or its similar expressions refer to any combination of these items, including any combination of single item (item) or plural items (items). For example, at least one (item) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0110] It should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including an..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0111] The steps of the methods or algorithms described in connection with the embodiments disclosed herein can be implemented directly in hardware, software modules executed by a processor, or a combination of both. The software modules can be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium well-known in the technical field.

[0112] The above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling the combustion stability of pulverized coal, characterized in that, The method includes: Obtaining combustion data of pulverized coal combustion; Calculating a stability quantitative parameter based on the combustion data; Determining a first magnitude relationship between the stability quantitative parameter and a first stability parameter, a second magnitude relationship between the stability quantitative parameter and a second stability parameter, and a time interval between the current moment and the moment of the last adjustment. The first stability parameter is an index parameter used to measure whether the pulverized coal combustion is stable, and the second stability parameter is a preset parameter for dividing a stable interval and is the minimum value of the stability quantitative parameter in the stable interval; If the first magnitude relationship, the second magnitude relationship, and the time interval satisfy an adjustment condition, improving the stability of the pulverized coal combustion. The adjustment condition includes that the first magnitude relationship is that the stability quantitative parameter is less than the first stability parameter, the second magnitude relationship is that the stability quantitative parameter is less than the second stability parameter, and the time interval is greater than a preset interval.

2. The method according to claim 1, wherein The method further includes: If the first magnitude relationship, the second magnitude relationship, or the time interval satisfies a non-adjustment condition, not adjusting the stability of the pulverized coal combustion. The non-adjustment condition includes that the first magnitude relationship is that the stability quantitative parameter is greater than the first stability parameter, the second magnitude relationship is that the stability quantitative parameter is greater than or equal to the second stability parameter, and the time interval is less than or equal to the preset interval, one or more of them.

3. The method according to claim 1, wherein The improving the stability of the pulverized coal combustion includes: Generating an adjustment instruction; Sending the adjustment instruction to an execution device, where the execution device is used to adjust the stability of the pulverized coal combustion.

4. The method according to claim 3, characterized in that The adjustment instruction includes an action amplitude, and the action amplitude is a linear function value or a piecewise linear function value of the difference between the stability quantitative parameter and the first stability parameter and a base amplitude, or the action amplitude is the product of the difference between the stability quantitative parameter and the first stability parameter, the base amplitude, and an adjustment coefficient.

5. The method according to claim 3, characterized in that, The adjustment instruction includes adjustment items, and the adjustment items include one or more of pulverized coal fineness, primary air temperature, secondary air temperature, primary air velocity, secondary air velocity, pulverized coal amount, and the swirler blade angle of the burner.

6. The method according to any one of claims 1-5, characterized in that, The obtaining the combustion data of the pulverized coal combustion includes: Obtaining the combustion data of the pulverized coal combustion through a collection device, where the collection device is used to collect the combustion data of the pulverized coal combustion at the outlet of the pulverized coal burner.

7. The method according to claim 6, characterized in that The collection device includes one or more of a flame detection collector, a sound collector, a micro-pressure collector, and a video collector.

8. A control device for the combustion stability of pulverized coal, characterized in that, The device includes: An obtaining unit for obtaining the combustion data of the pulverized coal combustion; A calculating unit for calculating a stability quantitative parameter based on the combustion data; A determination unit, configured to determine a first magnitude relationship between the stability quantitative parameter and a first stability parameter, a second magnitude relationship between the stability quantitative parameter and a second stability parameter, and a time interval between the current moment and the moment of the last adjustment. The first stability parameter is an index parameter used to measure whether the pulverized coal combustion is stable. The second stability parameter is a preset parameter for dividing a stable interval and is the minimum value of the stability quantitative parameter in the stable interval. An execution unit, configured to improve the stability of the pulverized coal combustion if the first magnitude relationship, the second magnitude relationship, and the time interval satisfy an adjustment condition. The adjustment condition includes that the first magnitude relationship is that the stability quantitative parameter is less than the first stability parameter, the second magnitude relationship is that the stability quantitative parameter is less than the second stability parameter, and the time interval is greater than a preset interval.

9. An actuator for the stability of pulverized coal combustion, characterized in that, Comprising: A processor, a memory, and a system bus; The processor and the memory are connected through the system bus; The memory is used to store one or more programs, and the one or more programs include instructions that, when executed by the processor, cause the processor to execute the method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, Instructions are stored in the computer-readable storage medium, and when the instructions are run on a terminal device, the terminal device is caused to execute the method according to any one of claims 1-7.

Images