Incinerator regulation and control method based on multi-angle analysis of fly ash combustion state

Abstract

The invention relates to the field of incinerator regulation and control, and discloses an incinerator regulation and control method based on multi-angle fly ash combustion state analysis, which comprises the following steps: firstly, collecting the flame combustion state in an incinerator, the element concentration in flue gas and the temperature in the incinerator, and monitoring the fly ash combustion state in the incinerator; performing linear weighted combination on the combustion state data in the incinerator to obtain flame state index data in the incinerator; constructing an incinerator regulation and control model according to the flame state index data in the incinerator; the flame state of the incinerator is regulated and controlled through the incinerator regulation and control model, and control and pre-judgment of the incineration state of fly ash in the incinerator are achieved; the problems that an existing incinerator monitoring system cannot accurately monitor the flame of the incinerator, the follow-up working state of the incinerator cannot be predicted, detection elements are one-sided, consequently, the incinerator always swings between high efficiency and low efficiency, energy is wasted, and the combustion effect is poor are solved.

Description

Technical Field

[0001] The invention relates to the field of incinerator control, and in particular to an incinerator control method based on multi-angle analysis of fly ash combustion status. Background Art

[0002] The combustion state of the current fly ash incinerator flame is an important indicator for evaluating the combustion system. The safe operation of the incinerator is inseparable from the monitoring of the flame combustion state in the incinerator. With the rise and development of artificial intelligence, the current image-based flame combustion state evaluation method is concentrated on the machine learning model, but the performance of the machine learning model depends to a large extent on the optimization of the model hyperparameters. Adjusting the hyperparameters requires experience and domain knowledge, which is a time-consuming and complicated process. In addition, most models only perform qualitative classification and divide the combustion state into two states: stable and unstable.

[0003] At present, the existing flame monitoring only detects the working status of the incinerator through simple temperature or the amount of fly ash in the incinerator, which is relatively one-sided. In addition, since the flame changes rapidly, the detection effect is not very good. It is difficult to accurately detect and predict the combustion state in the incinerator, and then maintain the best working state of the incinerator. Therefore, a technology that can accurately monitor and control the working state of the incinerator is imminent. Summary of the invention

[0004] The present invention aims to provide a method for monitoring the combustion state in an incinerator from multiple angles, so as to solve the problems that the existing incinerator monitoring system cannot accurately monitor the flame of the incinerator, cannot predict the subsequent working state of the incinerator, and the detection elements are relatively one-sided, resulting in the incinerator always swinging between high efficiency and low efficiency, wasting energy and having poor combustion effect.

[0005] In order to achieve the above object, the present invention provides the following method: The present invention provides an incinerator control method based on multi-angle analysis of the combustion state of fly ash: S1: Collect the flame combustion status in the incinerator, the element concentration in the flue gas and the temperature in the incinerator, and monitor the fly ash combustion status in the incinerator; S2: Performing linear weighted combination on the combustion state data in the incinerator to obtain the flame state index data in the incinerator; S3: constructing an incinerator control model according to the flame state index data in the incinerator; S4: The flame state of the incinerator is regulated by the incinerator regulation model to achieve control and prediction of the fly ash combustion state in the incinerator.

[0006] Preferably, the steps of collecting the flame combustion state in the incinerator, the element concentration in the flue gas and the temperature in the incinerator to monitor the fly ash combustion state in the incinerator include: taking multiple frames of photos of the flame combustion state in the incinerator in real time through a high-temperature resistant camera, and performing data analysis and classification to establish a flame combustion state model; installing an infrared flue gas analyzer in the middle and top of the incinerator to collect the flue gas in the incinerator, and extracting and analyzing the element concentration in the flue gas; arranging multiple targets and an infrared imager in the incinerator to collect temperature data in the incinerator to monitor the temperature changes in the incinerator; monitoring the fly ash combustion state in the incinerator through the flame combustion state model, element concentration analysis in the flue gas and temperature changes in the incinerator.

[0007] Preferably, the step of taking multiple frames of photos of the flame combustion state in the incinerator in real time by a high-temperature resistant camera, and performing data analysis and classification to establish a flame combustion state model includes: taking multiple frames of photos of the flame combustion state in the incinerator in real time by a high-temperature resistant camera; calculating the heights of the outer flame, inner flame and flame core and the size of the area occupied by each frame of the flame state photo according to the flame contour; establishing a fly ash-flame state relationship according to the amount of fly ash in the incinerator and the relationship between the heights of the outer flame, inner flame and flame core and the size of the area occupied; adding the influence of the combustion process of fly ash on the flame state into the fly ash-flame relationship to obtain a flame combustion state model.

[0008] Preferably, the steps of installing infrared flue gas analyzers in the middle and top of the incinerator to collect the flue gas in the incinerator and extracting and analyzing the element concentration in the flue gas include: installing an infrared flue gas analyzer in the middle of the incinerator to collect the flue gas in the incinerator and collect the initial concentration of the flue gas; installing an infrared flue gas analyzer at the top of the incinerator to collect the flue gas in the incinerator and collect the flue gas emission concentration; absorbing carbon in the flue gas collected by the infrared flue gas analyzer, precipitating carbon elements, and calculating the initial carbon content and the emission carbon content in a fixed volume of flue gas; and calculating the real-time combustion rate in the incinerator according to the initial carbon content and the emission carbon content.

[0009] Preferably, the formula for calculating the real-time combustion rate in the incinerator by the initial carbon content and the emission carbon content is: ; Real-time combustion rate in the incinerator w s， Initial carbon content C1, emission carbon content C2, combustion time t, initial volume of fly ash V1, volume of fly ash after combustion V2.

[0010] Preferably, the step of arranging multiple targets and an infrared imager in the incinerator to collect temperature data in the incinerator and monitoring temperature changes in the incinerator includes: arranging multiple targets on a vertical section near the incinerator for temperature sensing, and installing a near-infrared imager on the side wall of the incinerator to collect radiation energy from the targets; connecting the near-infrared imager to a computer, sending the collected radiation energy from the targets to the computer, which calculates the temperature data of the targets and converts it into the flue gas temperature at the location of the targets; directly measuring the temperature at the location by a high-precision thermistor, then comparing the measured temperature with the temperature measured by the near-infrared imager, and compensating the signal measured by the near-infrared imager according to the difference in temperatures measured by the two detection elements at different temperatures to obtain temperature changes in the incinerator.

[0011] Preferably, the step of performing linear weighted combination of the combustion state data in the incinerator to obtain the flame state index data in the incinerator includes: comparing and regulating the flame combustion state model with the real-time combustion rate in the incinerator according to the fly ash combustion time to obtain a flame state-fly ash combustion rate relationship diagram; adding a temperature change diagram in the incinerator to the flame state-fly ash combustion rate relationship diagram to find the peak difference point; according to the peak difference point, the flame state-fly ash combustion rate relationship diagram and the temperature change diagram in the incinerator, obtaining the optimal values ​​of the flame state, the incinerator combustion rate and the temperature in the incinerator, as well as the incinerator optimal efficiency temperature range and the flame state index data in the incinerator.

[0012] Preferably, the step of constructing an incinerator control model based on the flame state index data in the incinerator includes: setting the optimal operating state of the incinerator according to the optimal values ​​of the flame state, the incinerator combustion rate and the temperature in the incinerator; setting the optimal operating temperature control range and the fly ash conveying rate range of the incinerator according to the optimal efficiency temperature range of the incinerator; constructing an incinerator heating effect gradient table according to the optimal operating state of the incinerator, the optimal operating temperature control range of the incinerator and the fly ash conveying rate range to obtain the incinerator control model.

[0013] Preferably, the step of controlling the flame state of the incinerator through the incinerator control model to achieve control and prediction of the fly ash burning state in the incinerator includes: controlling the flame state of the incinerator through the incinerator control model, and optimizing the ambient temperature around the incinerator to place the incinerator within the optimal operating temperature control range of the incinerator; predicting the flame trend by monitoring the flame and flue gas concentration changes in the incinerator, and then adjusting the flame state to achieve control and prediction of the fly ash burning state in the incinerator.

[0014] Preferably, the flame state of the incinerator is regulated by increasing / decreasing the volume of fly ash, increasing / decreasing the space of the incinerator, and increasing / decreasing the oxygen content in the incinerator.

[0015] The beneficial effects of the present invention are as follows: the present invention collects and compares multiple elements by collecting the flame combustion state in the incinerator, the element concentration in the flue gas and the temperature in the incinerator, and then obtains the fly ash combustion state in the incinerator, and the detection effect is better. The introduction of three elements for reference and comparison can also make the monitored incinerator combustion state more accurate, and then through comparative analysis, the optimal value of the incinerator and the optimal efficiency temperature range of the incinerator are obtained, so that the state of the incinerator can always be maintained in the state of highest efficiency and maximum resource utilization, and then the incinerator is monitored and controlled in a variety of ways. A variety of different detection methods can prevent the occurrence of danger or equipment failure due to missing a detail when monitoring the incinerator condition. The combustion condition in the incinerator is adjusted by a variety of different methods, which can also make the adjustment process more flexible and rapid, adapt to serious emergencies, and make the regulation of the incinerator more accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0017] Figure 1 It is a flow chart of an incinerator control method based on multi-angle analysis of fly ash combustion status provided by an embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of combustion state monitoring elements of an incinerator control method based on multi-angle analysis of fly ash combustion state provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the technical personnel in the technical field better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in combination with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, device, product or end including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or ends.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] At present, the existing flame monitoring only detects the working status of the incinerator through simple temperature or the amount of fly ash in the incinerator, which is relatively one-sided. In addition, since the flame changes rapidly, the detection effect is not very good. It is difficult to accurately detect and predict the combustion state in the incinerator, and then maintain the best working state of the incinerator. Therefore, a technology that can accurately monitor and control the working state of the incinerator is imminent.

[0023] The present invention aims to provide a method for monitoring the combustion state in an incinerator from multiple angles, so as to solve the problems that the existing incinerator monitoring system cannot accurately monitor the flame of the incinerator, cannot predict the subsequent working state of the incinerator, and the detection elements are relatively one-sided, resulting in the incinerator always swinging between high efficiency and low efficiency, wasting energy and having poor combustion effect.

[0024] The specific embodiment of the present invention provides an incinerator control method based on multi-angle analysis of the combustion state of fly ash, the method is as follows Figure 1 As shown, the following steps are included: S1: Collect the flame combustion status in the incinerator, the element concentration in the flue gas and the temperature in the incinerator, and monitor the fly ash combustion status in the incinerator.

[0025] In an embodiment of the present invention, a high temperature resistant camera is used to take multiple frames of photos of the flame combustion state in an incinerator in real time, and data analysis and classification are performed to establish a flame combustion state model; a high temperature resistant camera is used to take multiple frames of photos of the flame combustion state in an incinerator in real time; the heights of the outer flame, the inner flame and the flame core and the size of the area occupied by each frame of the flame state photo are calculated according to the flame contour; a fly ash-flame state relationship is established according to the relationship between the amount of fly ash in the incinerator and the heights of the outer flame, the inner flame and the flame core and the size of the area occupied; the influence of the combustion process of fly ash on the flame state is added to the fly ash-flame relationship to obtain a flame combustion state model; An infrared flue gas analyzer is installed in the middle and top of the incinerator to collect the flue gas in the incinerator, and the element concentration in the flue gas is extracted and analyzed; an infrared flue gas analyzer is installed in the middle of the incinerator to collect the flue gas in the incinerator and collect the initial concentration of the flue gas; an infrared flue gas analyzer is installed on the top of the incinerator to collect the flue gas in the incinerator and collect the flue gas emission concentration; the infrared flue gas analyzer collects the flue gas in the incinerator for carbon absorption, precipitates the carbon element, and calculates the initial carbon content and the emission carbon content in the fixed volume of flue gas; the real-time combustion rate in the incinerator is calculated by the initial carbon content and the emission carbon content; the formula for calculating the real-time combustion rate in the incinerator by the initial carbon content and the emission carbon content is: ; Real-time combustion rate in the incinerator w s， Initial carbon content C1, emission carbon content C2, combustion time t, initial volume of fly ash V1, volume of fly ash after combustion V2; Arrange multiple targets and infrared imagers in the incinerator to collect temperature data in the incinerator and monitor temperature changes in the incinerator; arrange multiple targets on the vertical section near the incinerator for temperature sensing, and install a near-infrared imager on the side wall of the incinerator to collect the radiation energy of the target; connect the near-infrared imager to a computer, send the collected radiation energy of the target to the computer, calculate the computer to obtain the temperature data of the target, and convert it into the flue gas temperature at the location of the target; directly measure the temperature at the location through a high-precision thermistor, and then compare the measured temperature with the temperature measured by the near-infrared imager, and compensate the signal measured by the near-infrared imager according to the difference in temperature measured by the two detection elements at different temperatures to obtain the temperature change in the incinerator; monitor the combustion status of fly ash in the incinerator through a flame combustion state model, element concentration analysis in the flue gas and temperature changes in the incinerator.

[0026] S2: Performing linear weighted combination on the combustion state data in the incinerator to obtain flame state index data in the incinerator.

[0027] In an embodiment of the present invention, the flame combustion state model and the real-time combustion rate in the incinerator are compared and regulated according to the fly ash combustion time to obtain a flame state-fly ash combustion rate relationship diagram; the temperature change diagram in the incinerator is added to the flame state-fly ash combustion rate relationship diagram to find the peak difference point; based on the peak difference point, the flame state-fly ash combustion rate relationship diagram and the temperature change diagram in the incinerator, the optimal values ​​of the flame state, the incinerator combustion rate and the temperature in the incinerator are obtained, as well as the incinerator optimal efficiency temperature range and the flame state index data in the incinerator.

[0028] S3: Construct an incinerator control model based on the flame state index data in the incinerator.

[0029] In an embodiment of the present invention, the optimal operating state of the incinerator is set according to the optimal values ​​of the flame state, the combustion rate of the incinerator and the temperature inside the incinerator; the optimal operating temperature control range of the incinerator and the fly ash conveying rate range are set according to the optimal efficiency temperature range of the incinerator; and the heating effect gradient table of the incinerator is constructed according to the optimal operating state of the incinerator, the optimal operating temperature control range of the incinerator and the fly ash conveying rate range to obtain the incinerator control model.

[0030] S4: The flame state of the incinerator is regulated by the incinerator control model to achieve control and prediction of the fly ash combustion state in the incinerator.

[0031] In an embodiment of the present invention, the flame state of the incinerator is regulated by an incinerator control model, and the ambient temperature of the incinerator is optimized to place the incinerator within the optimal operating temperature control range of the incinerator; the flame state of the incinerator is regulated by: increasing / decreasing the volume of fly ash, increasing / decreasing the incinerator space, and increasing / decreasing the oxygen content in the incinerator; by monitoring the flame in the incinerator and the change in flue gas concentration, the trend of the flame is predicted, and then the flame state is adjusted to achieve control and prediction of the fly ash burning state in the incinerator.

[0032] The beneficial effects of the present invention are as follows: the present invention collects and compares multiple elements by collecting the flame combustion state in the incinerator, the element concentration in the flue gas and the temperature in the incinerator, and then obtains the fly ash combustion state in the incinerator, and the detection effect is better. The introduction of three elements for reference and comparison can also make the monitored incinerator combustion state more accurate, and then through comparative analysis, the optimal value of the incinerator and the optimal efficiency temperature range of the incinerator are obtained, so that the state of the incinerator can always be maintained in the state of highest efficiency and maximum resource utilization, and then the incinerator is monitored and controlled in a variety of ways. A variety of different detection methods can prevent the occurrence of danger or equipment failure due to missing a detail when monitoring the incinerator condition. The combustion condition in the incinerator is adjusted by a variety of different methods, which can also make the adjustment process more flexible and rapid, adapt to serious emergencies, and make the regulation of the incinerator more accurate and reliable.

[0033] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An incinerator control method based on multi-angle analysis of fly ash combustion status, characterized in that: The method comprises: S1: Collect the flame combustion status in the incinerator, the element concentration in the flue gas and the temperature in the incinerator, and monitor the fly ash combustion status in the incinerator; S2: Performing linear weighted combination on the combustion state data in the incinerator to obtain the flame state index data in the incinerator; S3: constructing an incinerator control model according to the flame state index data in the incinerator; S4: The flame state of the incinerator is regulated by the incinerator regulation model to achieve control and prediction of the fly ash combustion state in the incinerator.

2. The incinerator control method based on multi-angle analysis of fly ash combustion state according to claim 1 is characterized in that: The step of collecting the flame combustion state in the incinerator, the element concentration in the flue gas and the temperature in the incinerator to monitor the fly ash combustion state in the incinerator comprises: Use a high temperature resistant camera to take multiple frames of photos of the flame burning state in the incinerator in real time, analyze and classify the data, and establish a flame burning state model; An infrared flue gas analyzer is installed in the middle and top of the incinerator to collect the flue gas in the incinerator and extract and analyze the element concentration in the flue gas; Arrange multiple targets and infrared imagers in the incinerator to collect temperature data in the incinerator and monitor the temperature changes in the incinerator; The fly ash combustion condition in the incinerator is monitored through the flame combustion state model, element concentration analysis in the flue gas and temperature changes in the incinerator.

3. The incinerator control method based on multi-angle analysis of fly ash combustion state according to claim 2 is characterized in that: The steps of taking multiple frames of photos of the flame combustion state in the incinerator in real time by using a high temperature resistant camera, and performing data analysis and classification to establish a flame combustion state model include: Use a high temperature resistant camera to take multiple frames of photos of the flame burning status in the incinerator in real time; Calculate the height and area occupied by the outer flame, inner flame and flame core of each frame of flame state photo according to the flame outline; According to the relationship between the amount of fly ash in the incinerator and the height of the outer flame, inner flame and flame core as well as the size of the occupied area, the fly ash-flame state relationship is established; The influence of the combustion process of fly ash on the flame state is added into the fly ash-flame relationship to obtain a flame combustion state model.

4. The incinerator control method based on multi-angle analysis of fly ash combustion state according to claim 2 is characterized in that: The steps of installing an infrared flue gas analyzer at the middle and top of the incinerator to collect the flue gas in the incinerator and extracting and analyzing the element concentration in the flue gas include: An infrared flue gas analyzer is installed in the middle of the incinerator to collect the flue gas in the incinerator and collect the initial concentration of the flue gas; An infrared flue gas analyzer is installed on the top of the incinerator to collect the flue gas in the incinerator and collect the flue gas emission concentration; The infrared flue gas analyzer collects flue gas in the incinerator for carbon absorption, precipitates carbon elements, and calculates the initial carbon content and the emission carbon content in a fixed volume of flue gas; The real-time combustion rate in the incinerator is calculated according to the initial carbon content and the exhaust carbon content.

5. The incinerator control method based on multi-angle analysis of fly ash combustion state according to claim 4 is characterized in that: The formula for calculating the real-time combustion rate in the incinerator by the initial carbon content and the emission carbon content is: Real-time combustion speed in the incinerator s , initial carbon content C1, emission carbon content C2, combustion time t, initial volume of fly ash V1, volume of fly ash after combustion V2.

6. The incinerator control method based on multi-angle analysis of fly ash combustion state according to claim 2 is characterized in that: The step of arranging a plurality of targets and an infrared imager in the incinerator to collect temperature data in the incinerator and monitor the temperature change in the incinerator includes: Arrange multiple targets on a vertical section near the incinerator for temperature sensing, and install a near-infrared imager on the side wall of the incinerator to collect radiation energy from the targets; The near-infrared imager is connected to a computer, and the collected radiation energy of the target is sent to the computer, which calculates the temperature data of the target and converts it into the smoke temperature at the location of the target; The temperature at the location is directly measured by a high-precision thermistor, and then the measured temperature is compared with the temperature measured by the near-infrared imager. The signal measured by the near-infrared imager is compensated according to the difference in temperature measured by the two detection elements at different temperatures to obtain the temperature change in the incinerator.

7. The incinerator control method based on multi-angle analysis of fly ash combustion state according to claim 4 is characterized in that: The step of performing linear weighted combination of the combustion state data in the incinerator to obtain the flame state index data in the incinerator comprises: The flame combustion state model is compared and regulated with the real-time combustion rate in the incinerator according to the fly ash combustion time to obtain a flame state-fly ash combustion rate relationship diagram; Add the temperature change diagram in the incinerator to the flame state-fly ash combustion rate relationship diagram to find the peak difference point; According to the peak difference point, the flame state-fly ash combustion rate relationship diagram and the temperature change diagram in the incinerator, the optimal values ​​of the flame state, the incinerator combustion rate and the temperature in the incinerator are obtained, as well as the incinerator optimal efficiency temperature range and the flame state index data in the incinerator.

8. The incinerator control method based on multi-angle analysis of fly ash combustion state according to claim 7 is characterized in that: The step of constructing an incinerator control model according to the flame state index data in the incinerator comprises: According to the optimal values ​​of the flame state, the combustion rate of the incinerator and the temperature inside the incinerator, the optimal operation state of the incinerator is set; According to the incinerator's optimal efficiency temperature range, setting the incinerator's optimal operating temperature control range and fly ash delivery rate range; According to the optimal operating state of the incinerator, the optimal operating temperature control range of the incinerator and the fly ash conveying rate range, an incinerator heating effect gradient table is constructed to obtain an incinerator control model.

9. The incinerator control method based on multi-angle analysis of fly ash combustion state according to claim 8 is characterized in that: The step of controlling the flame state of the incinerator by the incinerator control model to achieve control and prediction of the fly ash incineration state in the incinerator includes: The flame state of the incinerator is regulated by the incinerator regulation model, and the ambient temperature of the incinerator is optimized so that the incinerator is within the optimal operating temperature control range of the incinerator; By monitoring the flame and flue gas concentration changes in the incinerator, the trend of the flame can be predicted, and then the flame state can be adjusted to achieve control and prediction of the fly ash burning state in the incinerator.

10. The incinerator control method based on multi-angle analysis of fly ash combustion state according to claim 9, characterized in that: The ways to regulate the flame state of the incinerator are: increasing / decreasing the volume of fly ash, increasing / decreasing the incinerator space, and increasing / decreasing the oxygen content in the incinerator.

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