Quality-divided combustion multi-grade gas ratio regulation and control method and system

Abstract

The invention relates to the technical field of organic solid waste treatment, and discloses a quality-divided combustion multi-grade gas ratio regulation and control method and system.The method comprises the steps that organic solid waste is pyrolyzed and carbonized in a carbonization furnace at the temperature of 300-800 DEG C, and in an oxygen-free environment, temperature intervals are divided to obtain low-calorific-value, medium-calorific-value and high-calorific-value component pyrolysis gas; the method comprises the following steps: collecting and storing combustion data, comparing and determining an initial ratio, calculating a combustion contribution degree according to similar historical data so as to determine a final ratio, introducing high-calorific-value component pyrolysis gas to increase the temperature of a hearth during combustion, and then introducing low-calorific-value component pyrolysis gas and medium-calorific-value component pyrolysis gas according to the final ratio. The proportion of multi-grade gas is accurately regulated and controlled based on data driving, the combustion efficiency is improved, generation of pollutants is reduced, efficient and clean combustion of organic solid waste pyrolysis gas is achieved, and the energy utilization rate is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of organic solid waste treatment, and in particular, to a method and system for regulating the ratio of multi-grade gases in separate combustion. Background Art

[0002] With the continuous growth of the global demand for renewable energy and the increasingly strict environmental protection policies, the pyrolysis carbonization and energy utilization of organic solid waste have become a research hotspot. By pyrolyzing and carbonizing organic solid waste in a carbonization furnace to generate pyrolysis gas, the resource utilization of waste can be realized, the dependence on traditional fossil energy can be reduced, and environmental pollution can be simultaneously reduced. However, there are many technical problems in the combustion application of current organic solid waste pyrolysis gas. On the one hand, the pyrolysis gas contains multiple components and the calorific values of each component vary greatly. The low-calorific value components are not easily fully combusted, resulting in low overall combustion efficiency, insufficient energy utilization rate, and the inability to fully exert the energy value of the organic solid waste pyrolysis gas. On the other hand, traditional combustion methods are difficult to accurately regulate the ratio of each component, and it is impossible to effectively balance the relationship among the combustion heat release, combustion stability, and pollutant generation amount, easily causing a large amount of pollutant emissions, such as carbon monoxide, nitrogen oxides, etc., which pollute the environment. In addition, the existing technology lacks a dynamic monitoring and optimization mechanism for the combustion process, and it is difficult to adjust the ratio of each component of the pyrolysis gas in a timely manner according to different combustion conditions, resulting in unstable operation of the combustion system and difficulty in meeting the actual production requirements for efficient, stable, and environmentally friendly combustion.

[0003] Therefore, there is an urgent need for a scientific and effective method for regulating the ratio of multi-grade gases in separate combustion to solve the above technical problems. Summary of the Invention

[0004] In view of this, the present invention proposes a method and system for regulating the ratio of multi-grade gases in separate combustion to solve the problems existing in the combustion application of current organic solid waste pyrolysis gas.

[0005] On the one hand, a method for regulating the ratio of multi-grade gases in separate combustion proposed by the present invention includes: Placing organic solid waste in a carbonization furnace for pyrolysis carbonization, controlling the temperature range of the carbonization furnace at 300 - 800°C, and maintaining the volume fraction of oxygen in the furnace below 1% in an oxygen-free environment; Sequentially dividing the temperature range from small to large into three temperature intervals, obtaining the pyrolysis gas generated in each temperature interval, and correspondingly recording it as low-calorific value components, medium-calorific value components, and high-calorific value components; the calorific value of the low-calorific value components is 0 - 500 kcal / Nm3, the calorific value of the medium-calorific value components is 500 - 2000 kcal / Nm3, and the calorific value of the high-calorific value components is higher than 2000 kcal / Nm3; Collect and store the combustion data of the low calorific value component, medium calorific value component and high calorific value component, compare the current combustion data with the historical combustion data, and determine the initial ratio; Collect the historical combustion data of similar historical ratio data, calculate the combustion contribution degrees of the low calorific value component, medium calorific value component and high calorific value component according to the combustion data of the similar historical ratio data, and determine the final ratio according to the combustion contribution degrees; During combustion, first introduce the pyrolysis gas of the high calorific value component to increase the furnace temperature, and then introduce the pyrolysis gas of the low calorific value component and the pyrolysis gas of the medium calorific value component at the final ratio.

[0006] Further, the combustion data includes: the collection amounts, calorific values, pressures during combustion, ventilation flow rates and combustion temperatures of the low calorific value component, medium calorific value component and high calorific value component.

[0007] Further, the collected combustion data is stored after being preprocessed, and the preprocessing includes: data cleaning and standardization processing; The data cleaning is to delete the combustion data of the current batch if the missing value of the combustion data of the current batch is greater than or equal to 20%; the standardization processing is to perform normalization processing on the combustion data and map it to the interval of [0, 1].

[0008] Further, comparing the current combustion data with the historical combustion data to determine the initial ratio includes: Extract key features from the current combustion data and historical combustion data; respectively extract the collection amount, calorific value, pressure during combustion, ventilation flow rate and combustion temperature of the low calorific value component, medium calorific value component and high calorific value component, and convert them into feature vectors. Calculate the similarity between the feature vector of the current combustion data and the feature vector of the historical combustion data according to the Euclidean distance formula. Preset a similarity threshold, and screen out the historical combustion data with the similarity of the current combustion data higher than or equal to the similarity threshold, which is recorded as the similar historical ratio data. Calculate the average value of the similar historical ratio data and use it as the initial ratio.

[0009] Further, the feature vector is expressed as: ; When calculating the similarity, randomly and non-repeatedly select two feature vectors, and the similarity satisfies the following relationship: ; Wherein, represents the collection amount, represents the calorific value, represents the pressure, represents the ventilation flow rate, Denotes the combustion temperature, with the subscripts low, mid, and high representing the low calorific value component, the medium calorific value component, and the high calorific value component respectively; Denotes the similarity, Denotes the number of elements in the said feature vector, And Denotes two selected feature vectors.

[0010] Furthermore, the combustion contribution degree includes: the combustion heat release contribution degree, the combustion stability contribution degree, and the pollutant generation amount contribution degree; The combustion heat release contribution degree satisfies the following relationship: ; Wherein, Denotes the combustion heat release contribution degree of the low calorific value component, Denotes the combustion heat release contribution degree of the medium calorific value component, Denotes the combustion heat release contribution degree of the high calorific value component; , And Among them, Denotes the combustion heat release of a certain component, and low, mid, and high respectively represent low, medium, and high grades.

[0011] Furthermore, the combustion stability contribution degree satisfies the following relationship: ; ; Wherein, low, mid, and high respectively represent low, medium, and high grades, Denotes the proportion of any grade component, Denotes the combustion stability contribution degree, Is the flame intensity fluctuation coefficient of the k - th group of combustion data, Denotes the standard deviation of the combustion flame intensity of the k - th group of combustion data, Denotes the average value of the combustion flame intensity of the k - th group of combustion data, Denotes the total number of combustion data.

[0012] Furthermore, the pollutant generation amount contribution degree satisfies the following relationship: ; Wherein, Denotes the pollutant generation amount contribution degree, Denotes the generation amount of polluting gas per combustion, Denotes the proportion of the low - grade component in the j - th group of combustion data relative to all components, Denotes the proportion of the medium - grade component in the j - th group of combustion data relative to all components, It represents the proportion of the high-grade components in the j-th group of combustion data relative to all components. It represents the total quantity of the combustion data.

[0013] Furthermore, the combustion contribution degree ratios of the low calorific value components, medium calorific value components, and high calorific value components are equal to the final ratio.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: Precise ratio improves combustion efficiency: The pyrolysis gas is divided into low calorific value, medium calorific value, and high calorific value components. The initial ratio is determined by collecting and comparing the current and historical combustion data, and the final ratio is determined by calculating the combustion contribution degree based on similar historical data. This method can fully consider the combustion characteristics of different components, enabling the components to reach the best cooperation state during mixed combustion, effectively solving the problem that low calorific value components are not easy to burn, thereby greatly improving the overall combustion efficiency and the energy utilization rate of the organic solid waste pyrolysis gas.

[0015] Balanced indicators reduce pollution emissions: By comprehensively considering the heat release during combustion, combustion stability, and pollutant generation amount to calculate the combustion contribution degree, and then determining the ratio, the relationship among the three can be effectively balanced. While ensuring that the heat release during combustion meets the requirements, the combustion process is stable, and the generation and emission of pollutants such as carbon monoxide and nitrogen oxides can be specifically reduced, realizing the environmental protection combustion of the organic solid waste pyrolysis gas and reducing environmental pollution.

[0016] Dynamic adaptation enhances system stability: This method is based on the real-time collected combustion data and historical data, and can dynamically adjust the ratio of each component of the pyrolysis gas according to different combustion conditions. Whether the pyrolysis gas composition fluctuates or the external working conditions change, the combustion system can quickly adapt, maintain stable operation, meet the strict requirements for efficient and stable combustion in actual production, and improve the reliability and applicability of the system.

[0017] On the other hand, a multi-grade gas ratio regulation system for separate combustion proposed by the present invention includes: A collection module, configured to collect and store the combustion data of the low calorific value components, medium calorific value components, and high calorific value components, compare the current combustion data with the historical combustion data, and determine the initial ratio; A first calculation module, configured to collect the historical combustion data of similar historical ratio data, calculate the combustion contribution degrees of the low calorific value components, medium calorific value components, and high calorific value components according to the combustion data of the similar historical ratio data, and determine the final ratio according to the combustion contribution degrees; A second calculation module, configured to, during combustion, first introduce the high calorific value component pyrolysis gas to increase the furnace temperature, and then introduce the low calorific value component pyrolysis gas and the medium calorific value component pyrolysis gas at the final ratio.

[0018] It can be understood that the method and system for regulating the multi-grade gas ratio of separate combustion provided by the present application have the same beneficial effects, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered as limiting the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings: Figure 1 FIG. is a flowchart of a method for regulating the multi-grade gas ratio of separate combustion provided by an embodiment of the present invention.

[0020] Figure 2 FIG. is a functional framework diagram of a system for regulating the multi-grade gas ratio of separate combustion provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The exemplary embodiments disclosed in the present application will be described in more detail below with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0022] Refer to Figure 1 As shown, an embodiment of the present invention provides a method for regulating the multi-grade gas ratio of separate combustion, including: S1: Place the organic solid waste in a carbonization furnace for pyrolytic carbonization, control the temperature range of the carbonization furnace at 300-800 °C, and maintain the volume fraction of oxygen in the furnace below 1% in an oxygen-free environment; S2: Divide the temperature range into three temperature intervals in ascending order, obtain the pyrolysis gas generated in each temperature interval, and correspondingly record it as the low calorific value component, the medium calorific value component, and the high calorific value component; the calorific value of the low calorific value component is 0-500 kcal / Nm3, the calorific value of the medium calorific value component is 500-2000 kcal / Nm3, and the calorific value of the high calorific value component is higher than 2000 kcal / Nm3; S3: Collect and store the combustion data of the low calorific value component, the medium calorific value component, and the high calorific value component, compare the current combustion data with the historical combustion data, and determine the initial ratio; S4: Collect the historical combustion data of similar historical ratio data, calculate the combustion contribution degrees of low calorific value components, medium calorific value components and high calorific value components based on the combustion data of similar historical ratio data, and determine the final ratio according to the combustion contribution degrees. S5: During combustion, first introduce the pyrolysis gas of high calorific value components to increase the furnace temperature, and then introduce the pyrolysis gas of low calorific value components and medium calorific value components in the final ratio.

[0023] Specifically, the high calorific value components include methane, ethane, propane, tar, hydrogen, carbon monoxide, etc. These components have high combustion calorific values, fast combustion reaction rates, strong heat release during combustion, and can quickly increase the combustion chamber temperature to the ideal combustion temperature (about 1050 °C), creating good conditions for the stable combustion of subsequent medium and low calorific value components.

[0024] Although the proportion of high calorific value components does not exceed 20%, the heat contribution proportion reaches more than 70%, which reflects the "centralization of combustion value" of the fuel. Using its preferential combustion can ensure the efficient release of heat energy, improve the thermal efficiency of the combustion system and pollutant control.

[0025] It should be noted that, first, by precisely controlling the temperature of the carbonization furnace at 300 - 800 °C and in an oxygen-free environment, the pyrolysis carbonization reaction can be ensured to proceed stably, effectively reducing the interference of oxidation reactions and improving the quality and yield of pyrolysis gas; second, dividing the temperature range to obtain different calorific value components can utilize the characteristics of each component specifically and lay a foundation for subsequent precise ratio. Third, determining the initial ratio based on the comparison of historical and current combustion data and calculating the combustion contribution degree in combination with similar historical data to clarify the final ratio can fully consider the roles of each component in terms of heat release during combustion, stability and pollutant generation amount, significantly improving the combustion efficiency, reducing the emissions of pollutants such as carbon monoxide and nitrogen oxides, and achieving efficient and clean combustion; finally, the way of dynamically adjusting the ratio enables the system to be flexibly adapted according to different working conditions, enhancing the stability of the combustion process, effectively improving the energy utilization rate of organic solid waste pyrolysis gas, and promoting the sustainable development of biomass energy utilization.

[0026] In some embodiments of the present application, the combustion data includes: the collection amounts, calorific values, pressures during combustion, ventilation flow rates and combustion temperatures of low calorific value components, medium calorific value components and high calorific value components.

[0027] In some embodiments of the present application, the collected combustion data is preprocessed before storage, and the preprocessing includes: data cleaning and standardization processing; Data cleaning means that if the missing value of the current batch of combustion data is greater than or equal to 20%, the combustion data of this batch is deleted; standardization processing means normalizing the combustion data and mapping it to the interval of [0, 1].

[0028] It should be noted that by setting data cleaning rules, when the missing rate of the current batch of combustion data is greater than or equal to 20%, the data of this batch is directly deleted, which can effectively eliminate invalid data that loses its analytical value due to a large amount of missing data and may even mislead subsequent calculations. This avoids the interference of incorrect data on the ratio calculation and combustion contribution analysis, ensures the reliability of the data from the source, and provides a solid foundation for subsequent scientific decision-making based on the data.

[0029] Perform normalization standardization on the combustion data, map the data to the interval [0, 1], and eliminate the differences in dimensions and numerical ranges of different data indicators (such as collection volume, calorific value, pressure, etc.). This makes the data that was originally difficult to directly compare due to different dimensions and numerical spans have a unified measurement standard and comparability. Thus, it ensures that in key links such as determining the initial ratio and calculating the combustion contribution, data from all dimensions can participate in the calculation fairly and accurately, improving the accuracy and scientific nature of the calculation results.

[0030] Reliable and comparable data can make the determination of the initial ratio based on historical and current combustion data more accurate, and also make the process of calculating the combustion contribution based on similar historical data more reasonable. Ultimately, it helps to determine a more optimal final ratio of each component of the pyrolysis gas, achieve precise control of the multi-grade gas ratio of fractional combustion, further improve the combustion efficiency of organic solid waste pyrolysis gas, reduce pollutant emissions, and ensure the stability and high efficiency of the combustion process.

[0031] In some embodiments of the present application, comparing the current combustion data with historical combustion data to determine the initial ratio includes: Extract key features from the current combustion data and historical combustion data; separately extract the collection volume, calorific value, pressure during combustion, ventilation flow rate, and combustion temperature for low-calorific value components, medium-calorific value components, and high-calorific value components, and convert them into feature vectors. Calculate the similarity between the feature vectors of the current combustion data and the feature vectors of the historical combustion data according to the Euclidean distance formula. Preset a similarity threshold, and screen out the historical combustion data with a similarity higher than or equal to the similarity threshold of the current combustion data, denoted as similar historical ratio data. Calculate the average value of the similar historical ratio data and use it as the initial ratio.

[0032] It should be noted that key features such as collection volume, calorific value, and pressure are extracted from the current and historical combustion data and converted into feature vectors, and the similarity is calculated using the Euclidean distance formula. This method can comprehensively and accurately measure the similarity between different combustion data, and screen out historical combustion data highly similar to the current working conditions from a large amount of historical data as similar historical ratio data. Compared with the traditional method of simply comparing some parameters to determine the ratio, it can better fit the actual combustion conditions and provide a more valuable data basis for the initial ratio.

[0033] By setting a similarity threshold to screen similar historical ratio data and calculating their average value as the initial ratio, the contingency and deviation that may exist in a single historical data are avoided. By integrating the historical ratio data under multiple similar working conditions, the initial ratio is made more representative and stable, reducing problems such as low combustion efficiency and poor stability caused by unreasonable initial ratios, and laying a reliable foundation for accurately regulating the proportions of various components of the pyrolysis gas subsequently.

[0034] The method of determining the initial ratio based on historical and current combustion data enables the system to better adapt to the differences in combustion conditions brought about by factors such as the characteristics of different organic solid waste raw materials, the operating status of equipment, and changes in the external environment. No matter what complex and changeable combustion situations are encountered, a similar scenario can be found from the historical data, and a relatively reasonable initial ratio can be quickly determined, thereby improving the adaptability and response ability of the entire combustion system to different working conditions and ensuring the efficient and stable operation of the combustion process.

[0035] In some embodiments of the present application, the feature vector is represented as: ; When calculating the similarity, two feature vectors are randomly and non-repeatedly selected, and the similarity satisfies the following relationship: ; where represents the collection amount, represents the calorific value, P represents the pressure, F represents the ventilation flow rate, T represents the combustion temperature, and the subscripts low, mid, and high respectively represent the low-calorific-value component, the medium-calorific-value component, and the high-calorific-value component; represents the similarity, represents the number of elements in the feature vector, and represent the two selected feature vectors.

[0036] It should be noted that the information such as the collection amount, calorific value, pressure, ventilation flow rate, and combustion temperature of the low-calorific-value, medium-calorific-value, and high-calorific-value components is integrated into the feature vector. It comprehensively covers the parameters of multiple key dimensions in the pyrolysis gas combustion process, can completely and accurately quantify the characteristics under different combustion conditions, and provides a rich and accurate data basis for subsequent similarity calculation and working condition matching.

[0037] The Euclidean distance formula is used to calculate the similarity between feature vectors. This formula measures the distance based on the square root of the sum of the squares of the differences of the elements in each dimension of the vector, and can effectively reflect the degree of difference between different feature vectors in the multi-dimensional space. In this way, the similarity between the current combustion condition and the historical condition can be accurately judged, so as to screen out the most valuable historical combustion data and provide a reliable basis for determining a reasonable pyrolysis gas component ratio.

[0038] Through the explicit feature vector representation and similarity calculation method, the entire combustion condition matching and ratio determination process becomes more scientific and standardized. It avoids the subjectivity and limitations of manual judgment or simple parameter comparison, enabling the system to determine the initial ratio based on accurate similar condition data, thereby optimizing the final ratio of each component of the pyrolysis gas, improving the combustion efficiency, reducing pollutant emissions, and enhancing the operation stability of the combustion system.

[0039] In some embodiments of the present application, the combustion contribution degree includes: the combustion heat release contribution degree, the combustion stability contribution degree, and the pollutant generation amount contribution degree; The combustion heat release contribution degree satisfies the following relationship: ; Among them, represents the combustion heat release contribution degree of the low calorific value component, represents the combustion heat release contribution degree of the medium calorific value component, represents the combustion heat release contribution degree of the high calorific value component; , and In, represents the combustion heat release of a certain component, and low, mid, and high respectively represent low, medium, and high grades.

[0040] It should be noted that by calculating the combustion heat release contribution degree of each calorific value component through explicit formulas, the proportion of low calorific value, medium calorific value, and high calorific value components in the total combustion heat release can be accurately quantified. This helps to clearly understand the specific contributions of different components to the combustion heat release, provides a scientific basis for reasonably adjusting the proportions of each component of the pyrolysis gas to meet different heat requirements, and avoids insufficient or wasted combustion heat caused by unclear heat contributions of components.

[0041] When determining the final ratio of each component of the pyrolysis gas, the combustion heat release contribution degree is an important consideration factor. Based on accurate contribution degree calculations, while ensuring that the combustion heat release meets the requirements, other factors (such as combustion stability and pollutant generation amount) can be comprehensively considered to precisely regulate the proportions of each component, achieving the maximization of combustion efficiency and energy utilization rate.

[0042] Clarifying the combustion heat release contribution degree of each component can provide strong support for the optimal design and operation management of the combustion system. It helps technicians adjust the combustion system parameters and improve the combustion equipment according to the actual working conditions and requirements, further enhancing the stability and efficiency of the organic solid waste pyrolysis gas combustion process. In some embodiments of the present application, the combustion stability contribution degree satisfies the following relationship: ; ; Among them, low, mid, and high represent low, medium, and high grades respectively, represents the proportion of any grade component, represents the contribution degree of combustion stability, is the flame intensity fluctuation coefficient of the k-th group of combustion data, represents the standard deviation of the combustion flame intensity of the k-th group of combustion data, represents the average value of the combustion flame intensity of the k-th group of combustion data, represents the total number of combustion data.

[0043] It should be noted that the contribution degree of combustion stability is calculated through a specific formula, comprehensively considering the proportions of low calorific value, medium calorific value, and high calorific value components and the flame intensity fluctuation coefficient. Among them, the flame intensity fluctuation coefficient is calculated by combining the standard deviation and average value of the flame intensity, which can comprehensively and accurately quantify the influence degree of different calorific value components on combustion stability. Compared with judging combustion stability only relying on experience or a single index, this quantification method is more scientific and accurate, and helps to deeply understand the action mechanism of each component in maintaining combustion stability.

[0044] Clarifying the contribution degree of combustion stability of each component provides a key basis for optimizing the proportion of each component of the pyrolysis gas. When determining the final proportion, the proportion of each component can be balanced based on the contribution degree of combustion stability. For example, if it is found that the low calorific value component has a low contribution to combustion stability, its proportion can be appropriately adjusted, and the proportion of the medium calorific value or high calorific value component can be increased to improve the overall combustion stability, avoid problems such as unstable flame and flameout, and ensure the smooth and continuous progress of the combustion process of the organic solid waste pyrolysis gas.

[0045] Accurately calculating the contribution degree of combustion stability helps technicians optimize the design and operation control of the combustion system. The combustion equipment parameters (such as ventilation flow rate, combustion temperature, etc.) can be adjusted according to the contribution of each component to combustion stability under different working conditions, and the burner structure can be improved. This can effectively improve the adaptability of the combustion system to different proportions of pyrolysis gas components, enhance the ability of the system to operate stably under complex working conditions, improve the reliability and efficiency of the combustion of the organic solid waste pyrolysis gas, and promote the development of biomass energy utilization technology.

[0046] In some embodiments of the present application, the contribution degree of pollutant generation amount satisfies the following relationship: ; Among them, represents the contribution degree of pollutant generation amount, represents the generation amount of polluted gas per combustion, represents the proportion of the low-grade component of the j-th group of combustion data relative to all components, It represents the proportion of the medium-grade components in the j-th group of combustion data relative to all components. It represents the proportion of the high-grade components in the j-th group of combustion data relative to all components. It represents the total quantity of combustion data In some embodiments of the present application, the combustion contribution degree ratios of the low calorific value components, medium calorific value components and high calorific value components are equal to the final ratio.

[0047] It should be noted that by calculating the pollutant generation amount contribution degree with this formula, the proportions of the low calorific value, medium calorific value, and high calorific value components and the pollutant gas generation amount per combustion are comprehensively considered, and the contribution degree of each calorific value component in pollutant generation can be accurately quantified. It changes the previous situation of vague understanding of the sources of pollutant generation, clearly defines the impacts of different components on pollution emissions, and provides a basis for targeted emission reduction.

[0048] After clarifying the pollutant generation amount contribution degree of each component, during the pyrolysis gas combustion process, the component ratio can be optimized based on this. For example, if it is found that the low calorific value component makes a large contribution to pollutant generation, its proportion can be appropriately reduced, and the proportion of other relatively clean combustion components can be increased, so as to effectively reduce the total pollutant emissions, meet the environmental protection requirements, and promote the development of the pyrolysis gas combustion of organic solid waste towards the direction of green environmental protection.

[0049] Based on the accurate calculation of the pollutant generation amount contribution degree, it helps technicians to carry out environmental protection optimization on the combustion system. The combustion equipment (such as adjusting the burner structure, optimizing the ventilation system, etc.) and combustion process (such as controlling the combustion temperature, improving the oxygen supply method, etc.) can be improved according to the pollution contribution of different components, reducing pollutant generation and enhancing the environmental protection performance of the pyrolysis gas combustion system of organic solid waste.

[0050] Ensuring that the combustion contribution ratio is equal to the final ratio can guarantee the overall combustion balance. Making the combustion contribution ratio equal to the final ratio means that when determining the final ratio of each component of the pyrolysis gas, various factors such as the heat release during combustion, combustion stability, and pollutant generation amount are fully considered. This enables the ratio of each component to not only meet the heat required for combustion but also maintain stable combustion and control pollutant emissions, achieving the comprehensive balance of multiple objectives during the combustion process and improving the overall efficiency of the combustion process. Moreover, it provides a clear and direct correlation criterion for determining the final ratio of each component of the pyrolysis gas, simplifying the logic and process of ratio determination. In actual operation, technicians can quickly determine the final ratio based on the calculated combustion contribution ratio, reducing the cumbersome testing and adjustment process, improving work efficiency, and enhancing the scientificity and accuracy of ratio determination. The final ratio enables each component to participate in combustion in a proportion that conforms to its combustion contribution characteristics during the operation of the combustion system, reducing problems such as combustion fluctuations and abnormal pollutant emissions caused by unreasonable ratios, improving the stability and reliability of the combustion system operation, and ensuring the continuous, stable, and efficient progress of the organic solid waste pyrolysis gas combustion process.

[0051] Refer to Figure 2 As shown, the embodiment of the present invention further provides a multi-grade gas ratio regulation system for separate combustion, including: An acquisition module configured to acquire and store the combustion data of low calorific value components, medium calorific value components, and high calorific value components, compare the current combustion data with the historical combustion data, and determine the initial ratio; A first calculation module configured to acquire the historical combustion data of similar historical ratio data, calculate the combustion contribution degrees of low calorific value components, medium calorific value components, and high calorific value components according to the combustion data of the similar historical ratio data, and determine the final ratio according to the combustion contribution degrees; A second calculation module configured to, during combustion, first introduce the high calorific value component pyrolysis gas to increase the furnace temperature, and then introduce the low calorific value component pyrolysis gas and the medium calorific value component pyrolysis gas at the final ratio.

[0052] Furthermore, the first calculation module is further configured to: compare the initial ratio with the final ratio, and when the numerical difference between the two exceeds a pre-set threshold, an alarm signal is issued.

[0053] Specifically, in the first stage: preferentially introduce the high calorific value component and quickly raise the temperature to the set combustion temperature (about 1050 °C) to avoid insufficient temperature and incomplete combustion caused by the direct combustion of low calorific value components.

[0054] The second stage: Introduce medium calorific value components (containing a large amount of CO2 and water vapor, with a calorific value in the range of 500 - 2000 kcal / Nm³), and burn them together with some low calorific value components. By adjusting the proportion of each component, the temperature and flame stability during the combustion process are achieved, ensuring that the 3T+E (temperature, residence time, turbulence, emissions) combustion standard meets the requirements for organic solid waste treatment.

[0055] The third stage: Adjust the flow rate of the low calorific value components according to the real-time combustion state to regulate the furnace temperature and combustion emissions, ensuring that the combustion process is efficient and environmentally friendly.

[0056] It should be noted that the acquisition module collects and stores the combustion data of low, medium, and high calorific value components, and compares them with historical data to determine the initial proportion. This process can quickly and comprehensively obtain the key data information during the combustion process. With the reference of historical data, the initial proportion suitable for the current working conditions can be accurately selected. Compared with the traditional manual experience judgment, it greatly improves the data processing efficiency and the accuracy of the initial proportion, laying a solid foundation for subsequent precise regulation.

[0057] The first calculation module calculates the combustion contribution degree of each component based on similar historical proportion data and then determines the final proportion. This module fully considers multi-dimensional factors such as combustion heat release, combustion stability, and pollutant generation. By quantifying the contribution of each component during the combustion process, a scientific and reasonable final proportion plan can be formulated. This optimization method effectively balances the relationship between combustion efficiency, stability, and environmental protection, changes the previous situation where proportion regulation lacks systematicness and scientificity, improves the energy utilization efficiency of organic solid waste pyrolysis gas, and reduces pollutant emissions.

[0058] The second calculation module mixes and burns each component according to the final proportion, ensuring that the combustion process can be carried out under the optimized proportion conditions. By precisely controlling the proportion of each component, the unstable combustion phenomena caused by improper proportion, such as flame fluctuations and incomplete combustion, can be effectively avoided, ensuring the stable and efficient operation of the combustion system, meeting the strict requirements of the actual production for the stability and reliability of the combustion process, and promoting the practical application and development of the organic solid waste pyrolysis gas combustion technology.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement without departing from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A method for regulating the ratio of multi-grade gases in separate combustion, characterized in that Comprising: Placing organic solid waste in a carbonization furnace for pyrolytic carbonization, controlling the temperature range of the carbonization furnace at 300 - 800 °C, and maintaining the volume fraction of oxygen in the furnace below 1% in an oxygen-free environment; Sequentially dividing the temperature range from small to large into three temperature intervals, obtaining the pyrolysis gas generated in each temperature interval, and correspondingly recording it as low calorific value component, medium calorific value component, and high calorific value component; the calorific value of the low calorific value component is 0 - 500 kcal / Nm3, the calorific value of the medium calorific value component is 500 - 2000 kcal / Nm3, and the calorific value of the high calorific value component is higher than 2000 kcal / Nm3; Collecting and storing the combustion data of the low calorific value component, medium calorific value component, and high calorific value component, comparing the current combustion data with the historical combustion data, and determining the initial ratio; Collecting the historical combustion data of similar historical ratio data, calculating the combustion contribution degrees of the low calorific value component, medium calorific value component, and high calorific value component according to the combustion data of the similar historical ratio data, and determining the final ratio according to the combustion contribution degrees; During combustion, first introduce the high calorific value component pyrolysis gas to increase the furnace temperature, and then introduce the low calorific value component pyrolysis gas and medium calorific value component pyrolysis gas in the final ratio.

2. The method for regulating the multi-grade gas ratio of separate combustion according to claim 1, characterized in that, The combustion data includes: the collection amounts, calorific values, pressures during combustion, ventilation flow rates, and combustion temperatures of the low calorific value component, medium calorific value component, and high calorific value component.

3. The method for regulating and controlling the multi-grade gas ratio of separate combustion according to claim 2, characterized in that The collected combustion data is preprocessed before storage, and the preprocessing includes: data cleaning and standardization processing; The data cleaning is to delete the combustion data of the current batch if the missing value of the current batch of combustion data is greater than or equal to 20%; the standardization processing is to perform normalization processing on the combustion data and map it to the interval [0, 1].

4. The method for regulating the multi-grade gas ratio of separate combustion according to claim 3, characterized in that Comparing the current combustion data with the historical combustion data to determine the initial ratio, including: Extracting key features from the current combustion data and historical combustion data; respectively extracting the collection amounts, calorific values, pressures during combustion, ventilation flow rates, and combustion temperatures of the low calorific value component, medium calorific value component, and high calorific value component, and converting them into feature vectors, calculating the similarity between the current combustion data feature vector and the historical combustion data feature vector according to the Euclidean distance formula, presetting a similarity threshold, screening out the historical combustion data with the similarity of the current combustion data higher than or equal to the similarity threshold, recording it as similar historical ratio data, and calculating the average value of the similar historical ratio data and taking it as the initial ratio.

5. The method for regulating the gas ratio of multi-grade gas in staged combustion according to claim 4, wherein, The feature vector is expressed as: ； When calculating the similarity, randomly and non-repeatedly select two feature vectors, and the similarity satisfies the following relationship: ； Among them, represents the collection quantity, represents the calorific value, represents the pressure, represents the ventilation flow rate, represents the combustion temperature, and the subscripts low, mid, and high respectively represent the low calorific value component, the medium calorific value component, and the high calorific value component; represents the similarity, represents the number of elements in the feature vector, and represent two selected feature vectors.

6. The method for regulating the multi-grade gas ratio of separate combustion according to claim 5, characterized in that, The combustion contribution degrees include: combustion heat release contribution degree, combustion stability contribution degree, and pollutant generation amount contribution degree; The combustion heat release contribution degree satisfies the following relationship: ； Among them, represents the contribution degree of the heat release from the combustion of low calorific value components, represents the contribution degree of the heat release from the combustion of medium calorific value components, represents the contribution degree of the heat release from the combustion of high calorific value components; , and in, represents the heat release from the combustion of a certain component, and low, mid, and high respectively represent low, medium, and high grades.

7. The method for regulating the multi-grade gas ratio in separate combustion according to claim 6, characterized in that The combustion stability contribution degree satisfies the following relationship: ； Among them, low, mid, and high represent low, medium, and high grades respectively, represents the proportion of any grade component, represents the contribution degree of combustion stability, is the flame intensity fluctuation coefficient of the k-th group of combustion data, represents the standard deviation of the combustion flame intensity of the k-th group of combustion data, represents the average value of the combustion flame intensity of the k-th group of combustion data, represents the total number of combustion data.

8. The method for regulating the multi-grade gas ratio of separate combustion according to claim 7, wherein The pollutant generation amount contribution degree satisfies the following relationship: ； Among them, represents the contribution degree of pollutant generation amount, represents the generation amount of polluting gas for each combustion, represents the proportion of the low-grade components in the j-th group of combustion data relative to all components, represents the proportion of the medium-grade components in the j-th group of combustion data relative to all components, represents the proportion of the high-grade components in the j-th group of combustion data relative to all components, represents the total number of combustion data.

9. The method for regulating the multi-grade gas ratio of separate combustion according to claim 8, characterized in that, The combustion contribution degree ratios of the low calorific value component, medium calorific value component, and high calorific value component are equal to the final ratio.

10. A multi-quality gas ratio regulation system for staged combustion, characterized in that, For implementing the method according to any one of claims 1 - 9, including: The acquisition module is configured to acquire and store the combustion data of low calorific value components, medium calorific value components and high calorific value components, compare the current combustion data with the historical combustion data, and determine the initial ratio; The first calculation module is configured to acquire the historical combustion data of similar historical ratio data, calculate the combustion contribution degrees of the low calorific value components, medium calorific value components and high calorific value components according to the combustion data of the similar historical ratio data, and determine the final ratio according to the combustion contribution degrees; The second calculation module is configured to, during combustion, first introduce the pyrolysis gas of the high calorific value component to increase the furnace temperature, and then introduce the pyrolysis gas of the low calorific value component and the pyrolysis gas of the medium calorific value component in the final ratio.

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