A waste incineration boiler control system that improves combustion stability

Abstract

This application relates to the technical field of waste incineration treatment, and specifically to a waste incineration boiler control system for improving combustion stability. The system includes: a waste incineration data acquisition module that collects gas and temperature data during the incineration process; a waste incineration data analysis and warning module that provides incomplete combustion warnings by analyzing the changing trends of the content of different flue gases during the combustion process; a waste incineration data warning processing module that analyzes the waste combustion efficiency and the incomplete oxide content of the flue gas during the combustion process to obtain an air intake adjustment coefficient; and a waste incineration air intake control module that controls the air supply rate based on the air intake adjustment coefficient. This application aims to improve waste combustion efficiency and combustion stability.

Description

Technical Field

[0001] The present application relates to the technical field of waste incineration treatment, and in particular to a waste incineration boiler control system for improving combustion stability. Background Art

[0002] Waste incineration boilers incinerate high-calorific-value waste, such as municipal and industrial waste, at high temperatures. Modern waste incineration boiler control systems typically utilize a combination of PLCs (Programmable Logic Controllers) and DCSs (Distributed Control Systems) for automated control. The incineration process also produces carbon monoxide, nitrogen oxides, and other harmful gases. Automated control, data analysis, flue gas monitoring, and treatment technologies can improve combustion stability and efficiency while reducing environmental pollution.

[0003] The current automatic control method for waste incinerators is generally based on fixed combustion parameters for adjustment. However, due to the complex composition of waste and large changes in the combustion process, fixed combustion parameters will lead to frequent imbalances between air and combustion products during the incineration process. If the amount of combustion air (air volume) is insufficient, the oxygen concentration in the furnace will be too low, resulting in insufficient oxidation of the fuel, incomplete combustion, and reduced combustion stability in the waste incineration boiler. Summary of the Invention

[0004] In view of the above, it is necessary to provide a waste incineration boiler control system that improves combustion stability and solves the above problems.

[0005] One embodiment of the present application provides a waste incineration boiler control system for improving combustion stability, the system comprising:

[0006] The waste incineration data acquisition module is used to obtain temperature data at each sampling moment and concentration data of various gases produced by combustion;

[0007] The garbage incineration data analysis and early warning module is used to determine the incomplete combustion index at each sampling moment based on the concentration data of different gases at each sampling moment; compare the incomplete combustion indexes at different sampling moments and analyze their changing trends to obtain the incomplete combustion early warning coefficient, issue an early warning for incomplete combustion, and determine the early warning time;

[0008] The waste incineration data early warning processing module is used to analyze the changing characteristics of temperature data at the early warning moment and all previous sampling moments, and compare them with the historical temperature data of complete combustion to obtain the waste incineration efficiency at the early warning moment; based on the distribution characteristics of the incomplete combustion index at the early warning moment and all previous sampling moments, combined with the gas content at the early warning moment, the smoke content weight at the early warning moment is obtained; based on the waste incineration efficiency and smoke content weight, the air intake adjustment coefficient at the early warning moment is obtained;

[0009] The waste incineration air inlet volume control module is used to control the air supply rate according to the air inlet volume adjustment coefficient at the warning moment.

[0010] The specific steps of determining the incomplete combustion index at each sampling moment include:

[0011] Gas concentration data include gas concentrations of oxygen, carbon monoxide, carbon dioxide, and sulfur dioxide;

[0012] For each sampling moment, the sum of the carbon monoxide gas concentration and the sulfur dioxide gas concentration is calculated, and the ratio of the sum to the oxygen gas concentration is recorded as the first ratio; the ratio of the carbon monoxide gas concentration to the carbon dioxide gas concentration is recorded as the second ratio; the result of forward fusion of the first ratio and the second ratio is used as the incomplete combustion index at each sampling moment.

[0013] The incomplete combustion warning coefficient is obtained as follows:

[0014] Obtain a first-order difference sequence of the incomplete combustion index sequence at the current sampling moment and all previous sampling moments, and calculate the element sum of the first-order difference sequence. Calculate the difference between the incomplete combustion index at the current sampling moment and the average of the incomplete combustion index at all sampling moments in the historical complete combustion process, and perform forward fusion with the element sum to obtain the incomplete combustion warning coefficient at the current sampling moment.

[0015] The condition for issuing a warning for incomplete combustion is that the normalized value of the complete combustion warning coefficient is greater than or equal to a preset threshold.

[0016] The specific process of obtaining the waste incineration efficiency at the warning moment is as follows:

[0017] Acquire all temperature data from the start of combustion to the warning moment, extract the slope of the temperature data at the warning moment, and record it as the first slope; obtain the moment with the same position sequence as the warning moment in the historical complete combustion process, record it as the reference moment, and record the slope of the temperature data at the reference moment as the second slope; record the ratio of the first slope to the second slope as the third ratio; record the ratio between the temperature data at the warning moment and the temperature data at the reference moment as the fourth ratio; and take the product of the third ratio and the fourth ratio as the waste incineration efficiency at the warning moment.

[0018] The specific process of obtaining the smoke content weight at the warning moment is as follows:

[0019] Obtain the minimum value of the incomplete combustion index at the warning moment and all previous sampling moments; calculate the difference between the incomplete combustion index at the warning moment and the minimum value, and multiply it by the negative correlation mapping result of the oxygen gas content at the warning moment to obtain the smoke content weight at the warning moment.

[0020] The oxygen gas content is specifically the ratio of oxygen gas concentration.

[0021] The air intake adjustment coefficient at the warning moment is specifically a normalized result of the ratio of the flue gas content weight to the waste incineration efficiency at the warning moment.

[0022] The specific formula for controlling the air supply rate is: Where, is the air supply rate at the warning moment; is the current fixed air supply rate, It is the air intake adjustment coefficient at the warning moment.

[0023] When the conditions for early warning of incomplete combustion are not met, the control of the air supply rate is stopped.

[0024] This application has at least the following beneficial effects:

[0025] This application determines the incomplete combustion index at each sampling moment based on the concentration data of different gases at each sampling moment, analyzes the changing trends of the content of different flue gases during the garbage incineration process, and performs incomplete combustion warnings, which helps to timely discover the problem of insufficient oxygen supply during the combustion process and issue timely warnings; further, the changing characteristics of the temperature data at the warning moment and all previous sampling moments are analyzed and compared with the temperature data of historical complete combustion to obtain the garbage incineration efficiency at the warning moment, which can accurately evaluate the efficiency and status of the current incineration process; based on the distribution characteristics of the incomplete combustion index at the warning moment and all previous sampling moments, combined with the gas content at the warning moment, the flue gas content weight at the warning moment is obtained; based on the garbage incineration efficiency and the flue gas content weight, the air intake adjustment coefficient at the warning moment is obtained, which helps to adjust the air intake in time when incomplete combustion is found, thereby optimizing the incineration process. By accurately controlling the air intake, the combustion efficiency can be improved, ensuring that the fuel is fully oxidized during the garbage incineration process, reducing the emission of harmful gases, and improving the operating stability and environmental performance of the overall incineration equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A block diagram of a waste incineration boiler control system for improving combustion stability provided in this application;

[0027] Figure 2This is a specific flow chart for controlling the air supply rate provided in this application. DETAILED DESCRIPTION

[0028] In the description of the embodiments of this application, words such as "exemplary," "or," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "or," and "for example" is intended to present the relevant concepts in a concrete manner.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of this application. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0030] It should also be noted that the terms "first" and "second" in this application and its accompanying drawings are used to distinguish similar objects, rather than to describe a specific order or precedence. The methods disclosed in the embodiments of this application or the methods shown in the flowcharts include one or more steps for implementing the methods. Without departing from the scope of protection of this application, the order of execution of multiple steps can be interchanged with each other, and some steps can also be deleted.

[0031] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0032] The following describes in detail a specific solution of a waste incineration boiler control system for improving combustion stability provided by the present application with reference to the accompanying drawings.

[0033] See also Figure 1 , which shows a block diagram of a waste incineration boiler control system for improving combustion stability provided by an embodiment of the present application. The system includes: a waste incineration data acquisition module, a waste incineration data analysis and early warning module, a waste incineration data early warning processing module, and a waste incineration air intake control module.

[0034] The present application embodiment first proposes a waste incineration boiler control system that improves combustion stability, which is applied to the field of waste incineration treatment technology. The system includes:

[0035] Waste incineration data acquisition module: obtains temperature data at each sampling moment and concentration data of various gases produced by combustion.

[0036] The structural design of a waste incinerator is designed to achieve efficient and environmentally friendly waste incineration. Its primary goal is to fully burn the waste and recover heat energy while ensuring that waste emissions meet environmental standards. A typical waste incinerator consists of a conveyor, incinerator, smoke exhaust, ventilation, and a corresponding control system. The control system transports the waste into the incineration chamber via the conveyor, and air is introduced into the chamber for incineration via the ventilation system. The resulting flue gases are then discharged or reused through the smoke exhaust. However, incomplete combustion can occur due to an imbalance between the combustion material and the air during the incineration process.

[0037] The present application optimizes the problem of incomplete combustion by adjusting the combustion air intake. Since incomplete combustion will produce various carbon oxides and sulfur oxides, corresponding sensors are installed in the smoke exhaust device of the waste incinerator to monitor the real-time concentration values ​​of different gases produced after combustion. In this embodiment, the collected gases include oxygen, carbon dioxide, carbon monoxide, and sulfur dioxide. At the same time, since the combustion temperature can more directly reflect the sufficiency of combustion, the real-time temperature value of the incineration process is obtained through the temperature sensor in the incineration chamber. In this embodiment, the gas concentration data and temperature data are collected synchronously, and the sampling interval is set to 2 seconds. Based on the historical combustion data of this boiler, various indicators under the condition of complete combustion are obtained, which facilitates the subsequent adjustment of the air intake of the incinerator based on the changing characteristics of the data to improve the stability of incineration.

[0038] Waste incineration data analysis and early warning module: Determine the incomplete combustion index at each sampling moment based on the concentration data of different gases at each sampling moment; compare the incomplete combustion indexes at different sampling moments and analyze their changing trends to obtain the incomplete combustion early warning coefficient and issue an early warning for incomplete combustion.

[0039] Combustion is a chemical reaction that requires oxygen. Generally, in a waste incineration boiler, the combustible reacts with oxygen to produce fully oxidized flue gas. If the boiler or burner does not have sufficient oxygen, the fuel will not burn completely, resulting in incomplete combustion and the production of incompletely oxidized flue gas. Therefore, this application first provides an incomplete combustion warning based on the real-time concentration of different flue gases during the incineration process.

[0040] Generally, when garbage is completely burned, it will produce high concentrations of carbon dioxide and nitrogen oxides, while the oxygen consumption and input are maintained at a stable level. When the oxygen content is not enough to maintain garbage combustion, it will lead to incomplete combustion, producing carbon monoxide and sulfur oxides, while the oxygen content gradually decreases. Therefore, the different gas concentrations at each sampling moment in the incineration process can be obtained to measure the incomplete combustion index. Specifically: for each sampling moment, the sum of the carbon monoxide gas concentration and the sulfur dioxide gas concentration is calculated, and the ratio of the sum to the oxygen gas concentration is recorded as the first ratio; the ratio of the carbon monoxide gas concentration to the carbon dioxide gas concentration is recorded as the second ratio; the result of the forward fusion of the first ratio and the second ratio is used as the incomplete combustion index at each sampling moment. In this embodiment, the forward fusion of multiple variables adopts the multiplication calculation method.

[0041] It should be understood that the first ratio represents the ratio of the gas concentrations of carbon monoxide and sulfur dioxide in the incomplete combustion products. The larger the value, the more incomplete the combustion and the larger the incomplete combustion index. The second ratio represents the difference between different carbon oxides. Since carbon monoxide is a characteristic gas produced by incomplete combustion, the greater its gas concentration, the larger the second ratio, and the greater the incomplete combustion index at the corresponding moment.

[0042] During the waste incineration process, in order to avoid incomplete combustion, the air input needs to be increased at the corresponding time. However, it is not necessary to increase the air input in time when the incomplete combustion index increases at a certain moment. Since the air input rate is fixed, the oxygen consumption gradually increases when the combustion is incomplete. When the oxygen concentration shows a downward trend over a period of time and the gas concentration generated by incomplete combustion shows an upward trend, that is, when the incomplete combustion index decreases over a period of time, it can be considered that there is an incomplete combustion problem in the waste incineration process. Based on this, the incomplete combustion index at different sampling moments is compared and its change trend is analyzed to issue an early warning for incomplete combustion. Specifically: a first-order difference sequence of a sequence consisting of the incomplete combustion index at the current sampling moment and all previous sampling moments is obtained, and the element sum value of the first-order difference sequence is calculated; the difference between the incomplete combustion index at the current sampling moment and the average of the incomplete combustion index at all sampling moments in the historical complete combustion process is calculated, and forward fused with the element sum value to obtain the incomplete combustion warning coefficient at the current sampling moment; when the normalized value of the incomplete combustion warning coefficient is greater than or equal to the preset threshold, an incomplete combustion warning is issued. In this embodiment, the differences between variables are calculated by difference; multiple variables are forward fused using the multiplication method; the normalization method used is the maximum and minimum value normalization method; and the preset threshold value is 0.85.

[0043] It should be understood that the elements and values ​​represent the changing trends of the incomplete combustion index at the current sampling moment and all previous sampling moments. The larger the value, the more the incomplete combustion index gradually increases as the incineration progresses, indicating that the incomplete combustion phenomenon is more obvious; at the same time, the greater the difference between the mean value of the incomplete combustion index at the current sampling moment and that at full combustion, the more incomplete the combustion in the furnace, and the greater the incomplete combustion warning coefficient.

[0044] Waste incineration data early warning processing module: Analyzes the change characteristics of temperature data at the early warning moment and all previous sampling moments, and compares them with the historical temperature data of complete combustion to obtain the waste incineration efficiency at the early warning moment; according to the distribution characteristics of the incomplete combustion index at the early warning moment and all previous sampling moments, combined with the gas content at the early warning moment, obtains the flue gas content weight at the early warning moment; based on the said waste incineration efficiency and flue gas content weight, obtains the air intake adjustment coefficient at the early warning moment.

[0045] The moment when an incomplete combustion warning is issued during the incineration process is recorded as the warning moment. In order to solve the problem of incomplete combustion caused by the imbalance between oxygen and combustion materials, this application adjusts the air intake to ensure the full combustion of the garbage and improve the combustion stability.

[0046] First, determine the waste incineration efficiency at the warning moment. Waste incineration efficiency is an indicator that measures the degree of heat energy conversion during the combustion process. Therefore, the magnitude of the combustion temperature can measure the waste incineration efficiency at the corresponding moment. If the waste fails to burn completely, the temperature from the start of combustion to the warning moment will be lower than that of complete combustion. That is, the greater the temperature difference, the lower the efficiency of the waste incineration process. Obtain all temperature data from the start of combustion to the warning moment, extract the slope of the temperature data at the warning moment, and record it as the first slope; obtain the moment with the same position sequence as the warning moment in the historical complete combustion process, record it as the reference moment, and record the slope of the temperature data at the reference moment as the second slope; record the ratio of the first slope to the second slope as the third ratio; record the ratio between the temperature data at the warning moment and the temperature data at the reference moment as the fourth ratio; and multiply the third ratio by the fourth ratio as the waste incineration efficiency at the warning moment.

[0047] It should be understood that the third ratio represents the difference in slopes of the real-time temperature data in the two cases at the warning moment. The larger this difference is, that is, the smaller the third ratio is, the greater the difference in trends between the real-time temperature data of the two at the same time sequence, that is, the lower the incineration efficiency of this incineration; the fourth ratio represents the difference in temperature accumulation of the real-time temperature data of the two at the same time sequence. If this difference is smaller, it means that the temperature accumulation is closer to the temperature data at the reference time, and the incineration efficiency is higher.

[0048] At the warning moment, if the garbage incineration efficiency is lower, it means that the garbage is more incompletely burned during the incineration process, and a larger air intake volume is needed to balance the combustion process. Conversely, if the garbage is more completely burned, a relatively smaller air intake volume is required.

[0049] Although temperature can directly reflect the combustion efficiency and determine whether the combustion is complete, it cannot fully reveal whether the combustion process has achieved the ideal chemical conversion effect, and it is difficult to adapt to the changes of different combustion materials. Therefore, it is necessary to combine the gas composition generated during the combustion process to more accurately adjust the intake volume. Specifically: obtain the minimum value of the incomplete combustion index at the warning moment and all previous sampling moments; calculate the difference between the incomplete combustion index at the warning moment and the minimum value, and multiply it with the negative correlation mapping result of the oxygen gas content at the warning moment to obtain the flue gas content weight at the warning moment. In this embodiment, the difference between the variables is calculated by subtraction; the negative correlation mapping result of the oxygen gas content is specifically the inverse of the oxygen gas content; wherein the oxygen gas content is specifically the proportion of the oxygen gas concentration. It should be noted that in order to avoid the oxygen weight being 0, a preset parameter needs to be added to the numerator, with a value of 0.01. Furthermore, in order to avoid the smoke content weight being meaningless due to the oxygen gas content being 0, a preset parameter is also added to the denominator.

[0050] It should be understood that the difference between the incomplete combustion index at the warning moment and the minimum value represents the proportion of incomplete oxides in the flue gas. Since the incomplete combustion index of garbage reflects the content of incomplete oxides in the flue gas to a certain extent, the larger the value, the more incomplete oxides are contained in the gas emitted at the warning moment. Combined with the oxygen content in the incinerator, if the oxygen gas content is smaller, the greater the oxygen consumption at this moment, and the corresponding flue gas content weight is larger.

[0051] If the boiler waste incineration efficiency at the warning moment is lower and the flue gas content weight is higher, it means that the incomplete combustion of the waste in the incinerator at this moment is more serious, and more inlet air is needed to balance the combustion of the combustibles. Conversely, the demand is smaller. Based on this, the normalized result of the ratio of the flue gas content weight at the warning moment to the waste incineration efficiency is used as the air intake adjustment coefficient at the warning moment. The normalization method used in this application is logarithmic normalization, so that the value of the air intake adjustment coefficient is in the range of [0,1].

[0052] It should be understood that if the value of the air intake adjustment coefficient is larger, it means that the imbalance between oxygen and combustion products is greater, and the demand for oxygen is greater; otherwise, it means that the demand for oxygen is relatively small.

[0053] Waste incineration air intake control module: controls the air supply rate according to the air intake adjustment coefficient at the warning moment.

[0054] Since the current automatic control of the waste incinerator delivers air to the incinerator at a fixed near-term rate, the warning caused by the imbalance between oxygen and combustion products mentioned above makes this fixed rate unable to meet the combustion requirements and stability. Therefore, it is necessary to adjust the fixed air supply rate at the warning moment based on the air intake adjustment coefficient, as shown below: Where, is the air supply rate at the warning moment; is the current fixed air supply rate, is the air volume adjustment coefficient at the warning moment. As the weight, if the air volume adjustment coefficient is larger, the incinerator will have a greater demand for air volume and a higher air supply rate. The larger the value.

[0055] The air intake at the warning moment is controlled to ensure full combustion of the combustible material as much as possible. Subsequently, as the air intake increases, the air supply rate is adjusted until the warning conditions are no longer met. Then, the next warning moment is determined and adjusted in real time.

[0056] The real-time air supply rate obtained above is used to automatically input the air supply rate adjustment instruction into the boiler control system. The fan speed or diameter of the air supply device is adjusted by the control system. At the same time, by dynamically adjusting the air supply rate, the system can accurately control the oxygen supply, fuel flow, etc. according to the actual combustion state, thereby achieving the best combustion effect and the optimal boiler operation state, and further improving the stability of combustion.

[0057] Among them, the specific flow chart for controlling the air supply rate is as follows: Figure 2 shown.

[0058] In summary, the embodiment of the present application determines the incomplete combustion index at each sampling moment based on the concentration data of different gases at each sampling moment, analyzes the changing trend of the content of different flue gases during the garbage incineration process, and performs incomplete combustion warning, which helps to timely discover the problem of insufficient oxygen supply during the combustion process and timely warn; further, the changing characteristics of the temperature data at the warning moment and all previous sampling moments are analyzed and compared with the temperature data of historical complete combustion to obtain the garbage incineration efficiency at the warning moment, which can accurately evaluate the efficiency and status of the current incineration process; according to the distribution characteristics of the incomplete combustion index at the warning moment and all previous sampling moments, combined with the gas content at the warning moment, the flue gas content weight at the warning moment is obtained; based on the garbage incineration efficiency and the flue gas content weight, the air intake adjustment coefficient at the warning moment is obtained, which helps to adjust the air intake in time when incomplete combustion is found, thereby optimizing the incineration process. By accurately controlling the air intake, the combustion efficiency can be improved, ensuring that the fuel is fully oxidized during the garbage incineration process, reducing the emission of harmful gases, and improving the operating stability and environmental protection performance of the overall incineration equipment.

[0059] The flowcharts and block diagrams in the accompanying drawings show the possible architecture, functions and operations of the systems, methods and computer program products according to the embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the part of the module, program segment or code contains one or more executable instructions for realizing the specified logical function. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. In the description corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in an order different from that disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified function or action, or may be implemented by a combination of dedicated hardware and computer instructions.

[0060] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A waste incineration boiler control system for improving combustion stability, characterized in that: The system includes: The waste incineration data acquisition module is used to obtain temperature data at each sampling moment and concentration data of various gases produced by combustion; The garbage incineration data analysis and early warning module is used to determine the incomplete combustion index at each sampling moment based on the concentration data of different gases at each sampling moment; compare the incomplete combustion indexes at different sampling moments and analyze their changing trends to obtain the incomplete combustion early warning coefficient, issue an early warning for incomplete combustion, and determine the early warning time; The waste incineration data early warning processing module is used to analyze the changing characteristics of temperature data at the early warning moment and all previous sampling moments, and compare them with the historical temperature data of complete combustion to obtain the waste incineration efficiency at the early warning moment; based on the distribution characteristics of the incomplete combustion index at the early warning moment and all previous sampling moments, combined with the gas content at the early warning moment, the smoke content weight at the early warning moment is obtained; based on the waste incineration efficiency and smoke content weight, the air intake adjustment coefficient at the early warning moment is obtained; The waste incineration air inlet control module is used to control the air supply rate according to the air inlet adjustment coefficient at the warning moment; The specific steps of determining the incomplete combustion index at each sampling moment include: Gas concentration data include gas concentrations of oxygen, carbon monoxide, carbon dioxide, and sulfur dioxide; For each sampling moment, the sum of the carbon monoxide gas concentration and the sulfur dioxide gas concentration is calculated, and the ratio of the sum to the oxygen gas concentration is recorded as a first ratio; the ratio of the carbon monoxide gas concentration to the carbon dioxide gas concentration is recorded as a second ratio; and the result of forward fusion of the first ratio and the second ratio is used as the incomplete combustion index at each sampling moment; The obtained incomplete combustion warning coefficient is specifically: Obtain a first-order difference sequence of the incomplete combustion index sequence at the current sampling moment and all previous sampling moments, and calculate the element sum of the first-order difference sequence. Calculate the difference between the incomplete combustion index at the current sampling moment and the average of the incomplete combustion index at all sampling moments in the historical complete combustion process, and perform forward fusion with the element sum to obtain the incomplete combustion warning coefficient at the current sampling moment.

2. A waste incineration boiler control system for improving combustion stability according to claim 1, characterized in that: The condition for issuing a warning for incomplete combustion is that the normalized value of the complete combustion warning coefficient is greater than or equal to a preset threshold.

3. A waste incineration boiler control system for improving combustion stability according to claim 1, characterized in that: The specific process of obtaining the waste incineration efficiency at the warning moment is as follows: Acquire all temperature data from the start of combustion to the warning moment, extract the slope of the temperature data at the warning moment, and record it as the first slope; obtain the moment with the same position sequence as the warning moment in the historical complete combustion process, record it as the reference moment, and record the slope of the temperature data at the reference moment as the second slope; record the ratio of the first slope to the second slope as the third ratio; record the ratio between the temperature data at the warning moment and the temperature data at the reference moment as the fourth ratio; and take the product of the third ratio and the fourth ratio as the waste incineration efficiency at the warning moment.

4. A waste incineration boiler control system for improving combustion stability according to claim 1, characterized in that: The specific process of obtaining the smoke content weight at the warning moment is as follows: Obtain the minimum value of the incomplete combustion index at the warning moment and all previous sampling moments; calculate the difference between the incomplete combustion index at the warning moment and the minimum value, and multiply it by the negative correlation mapping result of the oxygen gas content at the warning moment to obtain the smoke content weight at the warning moment.

5. A waste incineration boiler control system for improving combustion stability as claimed in claim 4, characterized in that: The oxygen gas content is specifically the ratio of oxygen gas concentration.

6. A waste incineration boiler control system for improving combustion stability according to claim 1, characterized in that: The air intake adjustment coefficient at the warning moment is specifically a normalized result of the ratio of the flue gas content weight at the warning moment to the waste incineration efficiency.

7. A waste incineration boiler control system for improving combustion stability according to claim 1, characterized in that: The specific formula for controlling the air supply rate is: Where, is the air supply rate at the warning moment; is the current fixed air supply rate, It is the air intake adjustment coefficient at the warning moment.

8. A waste incineration boiler control system for improving combustion stability as claimed in claim 2, characterized in that: When the conditions for early warning of incomplete combustion are not met, the control of the air supply rate is stopped.

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