Rural straw movable type incineration and carbonization co-processing method

Abstract

The invention relates to the technical field of incineration and carbonization collaboration, in particular to a rural straw movable incineration and carbonization collaboration processing method which comprises the following steps that a temperature sensor is adopted for detecting the temperature; setting a time window and an incineration interval; calculating an average incineration temperature of the incineration temperatures in the time window; the average incineration temperature and the incineration interval are compared, and whether a control instruction needs to be output or not is judged; calculating fluctuation amplitudes corresponding to a plurality of incineration temperatures in the time window, setting a fluctuation threshold value, and judging whether an adjusting instruction needs to be output or not; setting a carbonization interval, and dividing the incineration temperature sequence and the carbonization temperature sequence into a plurality of sub-temperature sequences along a time window; for each group of corresponding incineration and carbonization sub-temperature sequences, sequentially calculating corresponding core lagging durations by adopting a cross-correlation analysis method, and setting a lagging interval according to a plurality of core lagging durations; and calculating a time node when the carbonization temperature is changed by adopting the lag interval, and judging whether the carbonization temperature is within the carbonization interval or not.

Description

Technical Field

[0001] This invention relates to the field of co-processing technology of incineration and carbonization, and more specifically, to a method for co-processing rural straw through mobile incineration and carbonization. Background Technology

[0002] In the current field of rural straw treatment, traditional straw disposal methods generally suffer from prominent problems such as low resource utilization rate, high environmental pollution risk, and poor adaptability of treatment models. Specifically, some areas still use extensive methods such as on-site burning in the fields. The burning process lacks effective temperature control and exhaust gas treatment measures, and a large amount of particulate matter, nitrogen oxides, and volatile organic compounds are directly emitted into the atmosphere, causing serious air pollution, easily causing fires, and affecting transportation safety. At the same time, the biomass energy and carbon resources contained in straw are not effectively recovered. In other areas, centralized straw carbonization treatment mode is adopted. Although it can realize the resource conversion of straw, it has defects such as high straw collection and transportation costs, large equipment footprint, and insufficient flexibility. It is difficult to adapt to the characteristics of scattered straw distribution and large seasonal fluctuations in yield in rural areas. Moreover, the construction and operation and maintenance costs of centralized equipment are high, which is difficult for small and medium-sized farmers to afford, thus limiting the promotion of straw resource utilization. To avoid the aforementioned problems of low straw processing efficiency, resource waste, and environmental pollution, existing methods typically prioritize crushing rural straw to a particle size range of 2-5mm. This particle size design increases the contact area between the straw and oxygen, promoting complete combustion, while avoiding problems such as ventilation blockage in the combustion chamber due to excessively small particle size and incomplete combustion due to excessively large particle size. The crushed straw is then evenly spread within the combustion chamber, and a bottom-up combustion gradient is created by igniting the straw at the bottom of the chamber. Simultaneously, the ventilation volume is precisely controlled to regulate the combustion chamber. The oxygen concentration inside the furnace is adjusted to achieve stable and controllable burning of straw. In addition, during the burning process, in order to fully recover and utilize the waste heat generated by burning, reduce the additional energy consumption of the carbonization process, and improve the resource utilization rate of straw, the crushed straw is also placed in the carbonization furnace at the same time. The waste heat generated by the high temperature flue gas during burning and the heat radiation formed by the furnace wall is used to pyrolyze and carbonize the straw in the carbonization furnace, so as to produce biochar with a certain porosity structure without the need for additional heating, and realize the synergistic resource utilization of straw burning for power generation and carbonization for fertilizer production. During the burning and carbonization process, excessively high burning temperatures of straw can easily produce a large amount of harmful gases, while excessively low temperatures cannot completely kill insect eggs and pathogens in the straw. Excessively high carbonization temperatures can lead to increased biochar loss and decreased quality, while excessively low temperatures can make it difficult to complete the pyrolysis and carbonization reaction of straw. Therefore, it is necessary to set corresponding burning and carbonization zones according to the type of straw, moisture content, and target product requirements. The temperatures of the incinerator and carbonization furnace can be precisely controlled through the burning and carbonization zones to avoid problems such as incomplete burning, substandard carbonization product quality, and excessive emissions of harmful gases caused by temperature runaway. However, although setting incineration and carbonization zones can ensure the basic effects of incineration and carbonization to a certain extent during the incineration and carbonization process, the existing methods lack a coordinated control mechanism for incineration and carbonization temperatures, do not consider the lag characteristics of heat transfer between the incinerator and the carbonization furnace, and rely solely on manual experience or simple threshold feedback for ventilation volume adjustment. This makes it impossible to predict and dynamically adjust the temperature change trend in advance, which will lead to large fluctuations in incineration and carbonization temperatures. The waste heat from incineration cannot be efficiently and stably utilized by the carbonization furnace, resulting in not only energy waste but also uneven pyrolysis of straw in the carbonization furnace.

[0003] In view of this, we propose a method for the co-processing of rural straw through mobile burning and carbonization. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of low waste heat utilization efficiency and high additional energy consumption caused by the separation of traditional incineration and carbonization processes, as well as the problems of insufficient incineration, incomplete killing of insect eggs and pathogens, and unstable quality of carbonization products caused by insufficient temperature control precision and lack of synergistic regulation mechanism.

[0005] To achieve the above objectives, this invention provides a method for the co-processing of rural straw through mobile burning and carbonization, comprising the following steps: S1. Temperature sensor A and temperature sensor B are used to detect the incineration temperature and carbonization temperature in real time, respectively. When the temperature sensors detect the temperature, each sampling timestamp is the same and the sampling interval between adjacent sampling timestamps is the same. S2. Receive the incineration temperature detected in real time in step S1, and set a time window and incineration interval; retrieve multiple continuously detected incineration temperatures in step S1 according to the time window, and calculate the average incineration temperature within the time window; compare the average incineration temperature and the incineration interval to determine whether a control command needs to be output. S3. Calculate the fluctuation range of multiple incineration temperatures within the time window and set the fluctuation threshold. By comparing the fluctuation range and the fluctuation threshold, determine whether an adjustment command needs to be output. Correct the adjustment range of the ventilation volume control command in step S2 by adjusting the command. S4. Set the carbonization interval; receive the continuously collected incineration temperature and carbonization temperature in step S1; and synchronously divide the incineration temperature sequence and carbonization temperature sequence into multiple sub-temperature sequences of equal duration using the time window set in step S2; for each corresponding incineration and carbonization sub-temperature sequence, use the cross-correlation analysis method to calculate the corresponding core lag time in sequence, and set the lag interval according to the multiple core lag times. Furthermore, when the incineration temperature is stable within the preset incineration range in step S1, the time stamp of the incineration temperature entering the incineration range is used as a reference. The time node when the carbonization temperature is about to change is calculated by combining the lag range. It is then determined whether the carbonization temperature at the corresponding time node is within the carbonization range, and whether to output control commands and reminder signals.

[0006] As a further improvement to this technical solution, step S2 sets the time window as follows: The total number of samples within the calculation time window is ,in The sampling interval in step S1, To round down; Receive multiple continuously detected incineration temperatures in step S1 Call up in sequence Each incineration temperature forms a subset of temperatures within a time window: ; Calculate the average incineration temperature ,in Within the time window The incineration temperature corresponding to each sampling point; Compare the average combustion temperature with the preset combustion range: if the average combustion temperature is greater than the upper limit of the combustion range and the average combustion temperature is less than the lower limit of the combustion range, then output a control command to the ventilation volume adjustment actuator.

[0007] As a further improvement to this technical solution, when forming a subset of temperatures in step S2.1, the incineration temperature is used. The first incineration temperature is taken as the starting point, and then the same number of consecutive incineration temperatures as the total number of samples m are selected. Subsequently, each time the next incineration temperature after the current starting incineration temperature is taken as the new starting point, m consecutive incineration temperatures are repeatedly selected, thus forming temperature subsets corresponding to different time windows in sequence.

[0008] As a further improvement to this technical solution, step S3 calculates the fluctuation range corresponding to multiple incineration temperatures within the time window: first, the absolute value of the difference between two adjacent sampling temperatures within the window is calculated, and the average of multiple absolute values ​​is obtained to get the fluctuation range; Compare the fluctuation amplitude and the fluctuation threshold to determine whether an adjustment command needs to be output: If the fluctuation amplitude is greater than the fluctuation threshold, an adjustment command is output to correct the adjustment amplitude of the original ventilation volume control command, so that the fluctuation amplitude of the combustion temperature after the adjustment command is output is less than the fluctuation threshold.

[0009] As a further improvement to this technical solution, in step S4, from the initial time node to when the incineration temperature first exceeds the incineration range, the continuously collected incineration temperature and carbonization temperature in step S1 form an incineration temperature sequence. Carbonization temperature sequence ; The total number of samples corresponding to the time window in receiving step S2 Divide the incineration temperature sequence separately Carbonization temperature sequence Given multiple temperature subsequences containing m sampling points, the k-th subsequence is as follows: The kth incineration subsequence ; The kth carbonized subsequence .

[0010] As a further improvement to this technical solution, in step S4, during the process of dividing multiple temperature subsequences containing m sampling points, firstly, based on the initial sampling time, select m consecutive sampling points from the incineration temperature sequence and carbonization temperature sequence that are the same as the total number of samples m. Then, starting from the next unselected sampling time, repeat the selection of m consecutive sampling points to construct multiple temperature subsequences containing m sampling points.

[0011] As a further improvement to this technical solution, step S4 calculates the core lag time sequentially for each corresponding incineration and carbonization sub-temperature sequence using cross-correlation analysis. Specifically, using the sampling interval in step S1 as the minimum lag time, and using the minimum lag time as the starting and incrementing step size, multiple different lag times are generated; cross-correlation analysis is then used to calculate the incineration sub-sequence of the k-th sub-sequence under different lag times. , char subsequence The correlation coefficient between them is used to determine the lag time corresponding to the maximum correlation coefficient, which is the core lag time of the k-th subsequence.

[0012] As a further improvement to this technical solution, the lag time in step S4 is... At that time, the incineration subsequence , char subsequence The correlation coefficient between them is: ; in: Lag duration The corresponding sampling point offset number; For incineration subsequence The mean; The carbonized subsequence after a lag of d sampling points The mean.

[0013] As a further improvement to this technical solution, step S4 compares the core lag times corresponding to multiple consecutive sub-temperature sequences to analyze whether the core lag times are in a stable state; if the core lag times are stable, a lag interval is set, specifically: Calculate the core lag duration of N consecutive sets The relative volatility coefficient is used to set a stability threshold; if the relative volatility coefficient is less than or equal to the stability threshold, the core lag duration is determined to be in a stable state, and the maximum and minimum values ​​among the N sets of core lag durations are set as the lag interval. N consecutive core lag durations relative volatility coefficient ,in For N groups of core lag duration The mean, This represents the corresponding standard deviation.

[0014] As a further improvement to this technical solution, in step S4, when the combustion temperature is stable within the preset combustion range in step S1, the time stamp of the combustion temperature entering the combustion range is used as a reference, and the time node when the carbonization temperature is about to change is calculated in combination with the lag range. It is then determined whether the carbonization temperature at the corresponding time node is within the carbonization range. If the carbonization temperature is less than the lower limit of the carbonization range, a control command is output to drive the ventilation volume adjustment actuator to increase the ventilation volume. After each increase in ventilation volume, the trend of the carbonization temperature change is re-predicted based on the lag range to determine whether it can enter the carbonization range, until the predicted carbonization temperature is stable within the carbonization range. If, after the control command is output in step S4, the ventilation volume increases and the combustion temperature rises to or above the upper limit of the combustion zone, it indicates that there is an abnormal decrease in heat transfer efficiency in the heat transfer link between the carbonization furnace and the incinerator, and an alert signal is output.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In this method for the co-processing of mobile burning and carbonization of straw in rural areas, step S1 uses a K-type thermocouple temperature sensor to synchronously detect the burning temperature in the incinerator and the carbonization temperature in the carbonization furnace in real time. Step S2, based on the burning temperature data detected in step S1, further determines whether a control command needs to be output. The ventilation volume during the burning process is dynamically adjusted through the control command (the ventilation volume is positively correlated with the burning temperature, and reasonable adjustment can ensure the oxygen supply needs of straw combustion). In the process of controlling the ventilation volume, step S2 uses a time window to dynamically select multiple continuous burning temperature data. The average burning temperature within the time window is calculated for judgment, avoiding interference from accidental temperature data such as instantaneous temperature fluctuations at a single moment, local abnormal high or low temperatures, etc. This solves the problems of slow response and insufficient accuracy of traditional manual experience-based control, ensuring the stability and rationality of burning temperature control. During the synchronous ventilation control process, the fluctuation amplitude of multiple burning temperatures within the time window is calculated again in step S3 to further determine whether the control command in step S2 needs to be adjusted a second time. When the fluctuation amplitude exceeds the fluctuation threshold, the corresponding adjustment command is output to correct the adjustment amplitude of the ventilation control command in step S2 (such as reducing the single ventilation adjustment step size). Furthermore, during the initial burning of straw, the ventilation volume is precisely corrected through the adjustment command to ensure that the burning temperature increases gradually and continuously at a preset rate, strictly limiting the rate of increase in burning temperature. This avoids a sudden increase in burning temperature caused by a sudden increase in ventilation volume and also ensures that the burning of straw produces a certain amount of heat. The residual heat from combustion increases gradually. As the steadily increasing residual heat is transferred to the carbonization furnace through heat conduction and radiation from the furnace wall, it provides a gentle and continuous heat supply to the straw, promoting a slow and uniform carbonization reaction. This further maintains a uniform temperature distribution within the carbonization furnace, avoiding localized temperature differences caused by the different locations of the temperature sensors (such as near the furnace wall or in areas where straw is piled up), which could lead to deviations in carbonization temperature detection. At the same time, the uniform temperature field eliminates the problem of heat exchange imbalance between the temperature sensor probe and the surrounding medium, ensuring that the detected carbonization temperature fully reflects the true temperature state inside the carbonization furnace. Based on the reliable carbonization temperature in step S3, step S4 determines the core lag time by calculating the correlation coefficient between the incineration temperature and the carbonization temperature, and then analyzes the lag interval between the two. Taking the timestamp of the incineration temperature entering the preset incineration interval (determined based on the critical temperature for inactivation of insect eggs and pathogens) as the benchmark, the time node when the carbonization temperature is about to change is accurately calculated in combination with the lag interval. At the same time, it is determined whether the carbonization temperature at this time node is within the preset carbonization interval (the carbonization interval is determined based on the optimal temperature parameters for straw carbonization to ensure the quality of biochar). If the calculated carbonization temperature is less than the lower limit of the carbonization interval, a control command to increase the ventilation volume is immediately output, which can promptly increase the incineration temperature in the incinerator, thereby increasing the amount of waste heat supplied to the carbonization furnace, so that the carbonization temperature can quickly rise back to the carbonization interval, avoiding the carbonization temperature from being too low. This addresses the issue of incomplete straw carbonization and low fixed carbon content, which is a drawback of traditional carbonization processes and leads to unstable product quality. Furthermore, if increased ventilation causes the combustion temperature to rise continuously due to ample oxygen supply and exceed the upper limit of the combustion range, the failure of the carbonization temperature to rise synchronously with the combustion temperature, despite the heat transfer efficiency between the incinerator and carbonization furnace (which should be positively correlated with the combustion temperature), indicates ineffective heat exchange. This suggests an abnormal decrease in heat transfer efficiency between the carbonization furnace and incinerator (e.g., increased thermal resistance due to ash accumulation and slagging on the furnace walls or coking on the heat transfer surface). A warning signal is then output to promptly alert staff to heat transfer system malfunctions, facilitating timely maintenance and repair. This prevents energy waste, carbonization process interruptions, and equipment safety risks caused by heat transfer failures, ensuring the continuous and stable operation of the co-processing of incineration and carbonization.

[0016] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall module of the present invention. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] 1. A method for co-processing rural straw through mobile burning and carbonization, characterized by comprising the following steps: S1. Temperature sensor A and temperature sensor B are used to detect the incineration temperature and carbonization temperature in real time, respectively. When the temperature sensors detect the temperature, each sampling timestamp is the same and the sampling interval between adjacent sampling timestamps is the same. S2. Receive the incineration temperature detected in real time in step S1, and set a time window and incineration interval; retrieve multiple continuously detected incineration temperatures in step S1 according to the time window, and calculate the average incineration temperature within the time window; compare the average incineration temperature and the incineration interval to determine whether a control command needs to be output. S3. Calculate the fluctuation range of multiple incineration temperatures within the time window and set the fluctuation threshold. By comparing the fluctuation range and the fluctuation threshold, determine whether an adjustment command needs to be output. Correct the adjustment range of the ventilation volume control command in step S2 by adjusting the command. S4. Set the carbonization interval; receive the continuously collected incineration temperature and carbonization temperature in step S1; and synchronously divide the incineration temperature sequence and carbonization temperature sequence into multiple sub-temperature sequences of equal duration using the time window set in step S2; for each corresponding incineration and carbonization sub-temperature sequence, use the cross-correlation analysis method to calculate the corresponding core lag time in sequence, and set the lag interval according to the multiple core lag times. Furthermore, when the incineration temperature is stable within the preset incineration range in step S1, the time stamp of the incineration temperature entering the incineration range is used as a reference. The time node when the carbonization temperature is about to change is calculated by combining the lag range. It is then determined whether the carbonization temperature at the corresponding time node is within the carbonization range, and whether to output control commands and reminder signals.

[0020] In the above embodiment, step S1 synchronously and in real-time detects the combustion temperature and carbonization temperature using temperature sensors A and B at the same sampling time and interval, providing accurate and time-matched basic data support for subsequent control; step S2, based on the combustion temperature data from step S1, retrieves continuous data and calculates the average combustion temperature by setting a time window, and determines whether to output a control command based on the combustion interval, thus achieving preliminary dynamic control of the combustion temperature and avoiding control deviations caused by interference from single temperature data; step S3, relying on the time window of step S2, calculates the fluctuation range of the combustion temperature and compares it with the fluctuation range. Threshold comparison, output adjustment command to correct the ventilation volume control range in step S2, further refine the control precision, ensure stable fluctuation and gradual increase of combustion temperature, and ensure the smooth transfer of combustion waste heat; step S4 reuses the time window of step S2, synchronously divides the combustion and carbonization temperature sequences, calculates the core lag time through cross-correlation analysis and sets the lag interval, after the combustion temperature in step S1 stabilizes in the combustion interval, takes the time stamp of the combustion temperature entering the interval as the benchmark, combines the lag interval to estimate the time node of the carbonization temperature change, determines whether it is in the carbonization interval, and then outputs control command or reminder signal; In one embodiment, the specific implementation process of the above step S1 is as follows: temperature sensor A and temperature sensor B are used to detect the incineration temperature and carbonization temperature in real time, respectively, and the temperature sensors detect the temperature with the same sampling timestamp and the same sampling interval between adjacent sampling timestamps. In step S1, temperature sensors A and B can be K-type thermocouple temperature sensors. The specific working principle of the K-type thermocouple temperature sensor is as follows: before using the K-type thermocouple temperature sensor to detect the temperature in real time, the measuring end of the K-type thermocouple temperature sensor is directly installed at the key temperature measuring point of the area to be detected, in direct contact with the environment of the area to be detected, to detect the temperature inside the area to be detected in real time; the reference end of the K-type thermocouple temperature sensor is placed in a reference environment with a constant temperature (such as maintaining a 0℃ reference through a cold junction compensator), forming a clear temperature difference; Because the K-type thermocouple temperature sensor corresponds to two homogeneous conductors with different compositions, the electron work functions are different. When there is a temperature difference between the measuring end and the reference end, electrons will move directionally from the conductor with the lower work function to the conductor with the higher work function, forming a stable thermoelectric potential (a weak electrical signal at the millivolt level) in the closed loop. Moreover, the higher the temperature in the detection area (the greater the temperature difference between the measuring end and the reference end), the stronger the generated thermoelectric potential. Specifically, there is a fixed linear correspondence between the temperature and the thermoelectric potential. The electrical potential is converted into the temperature within the detection area using a standard calibration curve of thermoelectric potential-temperature. ,in , The linear fitting coefficient of the thermoelectric potential-temperature calibration curve of the K-type thermocouple (determined by calibration experiments).

[0021] This invention further considers that during the burning of straw, due to the uneven moisture content and fluctuating calorific value of the straw itself, and the need to achieve a fixed burning range (usually not less than 550°C) and sufficient burning duration (generally not less than 30 minutes) to kill insect eggs and pathogens, only by meeting these two conditions can the embryonic structure of insect eggs and the cell walls of pathogens be destroyed, thereby ensuring the complete elimination of harmful organisms such as insect eggs and pathogens hidden in the straw, and preventing them from entering the soil with the straw residue and causing the spread of pests and diseases; however, in the field During the burning process, the burning process is easily affected by external factors such as wind, humidity and straw density in the field. Insufficient oxygen supply can lead to smoldering or excessive oxygen supply can lead to uncontrolled fire. In order to ensure effective burning, the ventilation volume during the burning process needs to be precisely controlled to ensure that the oxygen concentration in the burning furnace is maintained within a reasonable range (about 12%~18%), so as to achieve full combustion of straw. This avoids problems such as insufficient burning temperature and incomplete killing of harmful organisms due to lack of oxygen, and also prevents the spread of fire and waste of heat energy due to excessive oxygen. Therefore, step S2 receives the burning temperature detected in real time in step S1 and sets a burning range; it then determines whether the burning temperature is sufficient to kill insect eggs and pathogens in the straw based on the burning range. In one embodiment, the specific working steps of step S2 are as follows: To avoid interference from the instantaneous fluctuations in the incineration temperature obtained from a single sampling on subsequent control decisions and to ensure the stability and accuracy of the control logic, S2.1: Set a time window of sufficient duration and an incineration range (e.g., 550℃~650℃) pre-defined based on the needs for pest control. Based on the time window, retrieve multiple continuously detected incineration temperatures from step S1, and calculate the average incineration temperature within the time window. The specific expression is as follows: Set the time window as The total number of samples within the calculation time window is ,in The sampling interval in step S1, This is to round down, ensuring that the number of selected sampling points matches the duration of the time window; Receive multiple continuously detected incineration temperatures in step S1 Call up in sequence Each incineration temperature forms a subset of temperatures within a time window: ; Average incineration temperature within the time window That is, a subset of temperature The average value of all incineration temperatures is expressed as follows: ,in Within the time window The incineration temperature corresponding to each sampling point; S2.2: Comparison of average incineration temperature and incineration range: If the average incineration temperature is within the incineration range, it means that the current incineration temperature is within the optimal range for killing harmful organisms. The incineration effect is stable and can take into account the efficiency of heat energy utilization. Therefore, no control command is output, thereby maintaining the current ventilation volume and ensuring that the current incineration state remains stable. If the average burning temperature is greater than the upper limit of the burning range, it indicates that there is an excessive amount of oxygen in the furnace and the straw is burning too fast. This will not only cause rapid heat loss, but may also produce a large amount of harmful gases due to the high temperature. At the same time, the high temperature is likely to damage the furnace structure of the burning equipment. Therefore, the control command is sent to the ventilation volume adjustment actuator to reduce the ventilation volume. The reduced ventilation volume will reduce the oxygen supply in the furnace, slow down the straw burning rate, and thus reduce the burning temperature, so that the average burning temperature falls back to the inside of the burning range. If the average burning temperature is less than the lower limit of the burning range, it indicates that the oxygen supply in the furnace is insufficient, the straw is in a state of incomplete combustion and smoldering, and the burning temperature cannot reach the required burning range to kill insect eggs and pathogens. In addition, it is easy to produce a large amount of smoke and unburned residue, which affects the efficiency of subsequent waste heat recovery. Therefore, the control command is output to the ventilation volume adjustment actuator to increase the ventilation volume. The increased ventilation volume increases the oxygen concentration in the furnace, accelerates the straw combustion reaction rate, and thus increases the burning temperature, ensuring that the average burning temperature reaches the burning range for killing harmful organisms.

[0022] This invention further considers that, in order to achieve the harmless treatment and resource utilization of straw and avoid environmental pollution and resource waste caused by the random disposal or burning of straw, existing methods used in the field need to provide a continuous and stable heat source for the straw to be burned in the carbonization furnace through the heat released from burning the straw. This heat source is used to meet the temperature conditions required for straw pyrolysis, so that the straw can undergo pyrolysis reaction in an oxygen-deficient environment to generate biochar, bio-oil and organic gases. In the subsequent burning of pyrolysis products and remaining straw, the combustible gases generated by pyrolysis can be fully utilized to improve combustion efficiency and reduce smoke and dust emissions. However, if the ventilation volume is increased or decreased in step S2, the oxygen concentration and airflow state in the carbonization furnace will be directly changed. The oxygen concentration is the core factor affecting the straw combustion rate and pyrolysis reaction process. The change in airflow state will disrupt the heat transfer balance in the incinerator, causing drastic and irregular fluctuations in the carbonization temperature in the incinerator and carbonization furnace. The aforementioned temperature fluctuations not only disrupt the stable operating conditions of the straw pyrolysis reaction, causing a decline in the quality of products such as biochar and bio-oil, but also affect the burning range and duration required for the elimination of insect eggs and pathogens, thus failing to guarantee the effectiveness of straw harmless treatment. Therefore, in one embodiment, to avoid the above situation, step S3 calculates the fluctuation amplitude corresponding to multiple burning temperatures within the time window, and sets a scientifically reasonable fluctuation threshold based on the process requirements of straw pyrolysis and burning. By comparing the fluctuation amplitude and the fluctuation threshold, it is determined whether the control signal in step S2 during straw burning is accurate. If it is inaccurate, an output adjustment command is output. More detailed working steps are as follows: Step 1: Calculate the fluctuation range of multiple incineration temperatures within the time window: First, calculate the absolute value of the difference between two adjacent sampling temperatures within the window, and then average the multiple absolute values ​​to obtain the fluctuation range; Step 2: Set the fluctuation threshold; Step 3: Compare the fluctuation amplitude and fluctuation threshold to determine whether an adjustment command needs to be output: If the fluctuation range is less than the fluctuation threshold, it means that the current combustion temperature in the incinerator is within a stable fluctuation range. At this time, the change in combustion temperature will not have an adverse effect on the process, and at the same time, it can ensure that the residual heat during combustion is stably transferred to the carbonization furnace, thus ensuring the stability of the heat supply during the carbonization process. If the fluctuation amplitude exceeds the fluctuation threshold, it indicates that the current ventilation adjustment strategy will cause the combustion temperature fluctuation to exceed the acceptable range of the process. At this time, due to the sudden temperature change, the thermal balance of straw combustion and the continuity of waste heat transfer will be disrupted, which will not only lead to the disorder of the straw pyrolysis reaction process, but also cause problems such as sudden temperature rise and fall and deterioration of biochar quality during the carbonization process. Therefore, an adjustment command is output to correct the adjustment amplitude of the original ventilation volume control command, such as reducing the single adjustment step size of the ventilation volume, so that the combustion temperature fluctuation amplitude after the output adjustment command is less than the fluctuation threshold. This ensures that the combustion temperature in the incinerator changes slightly and that the waste heat from combustion is fully transferred to the carbonization furnace, so that the temperature in the carbonization furnace remains stable, taking into account both the resource utilization benefits of straw pyrolysis and the requirements for harmless treatment by incineration.

[0023] Furthermore, during the initial burning of straw, step S3, through fluctuation thresholds and corresponding ventilation volumes, enables the burning temperature to gradually increase until it falls within the burning range. During this continuous temperature increase, based on the principle of matching stepwise heating with system thermal inertia, the ventilation volume is adjusted in stages and with small amplitudes to strictly limit the rate of temperature rise. This ensures that the residual heat generated during straw burning increases gradually and steadily. The rigid constraint of the fluctuation threshold effectively prevents sudden spikes in residual heat. When this steadily increasing residual heat is transferred to the carbonization furnace, it creates a mild and continuous pyrolysis environment for the straw to be processed within the furnace, promoting a slow and uniform carbonization reaction. Meanwhile, when the carbonization temperature inside the carbonization furnace is collected by a temperature sensor in step S1, the heat source for the carbonization furnace comes from the gradually increasing waste heat from combustion. The heat transfer process is stable and continuous without drastic fluctuations. The temperature field inside the furnace is uniformly distributed without any local sudden rises or falls. Furthermore, since the detection principle of the temperature sensor is based on the heat exchange balance between the medium temperature in its detection area and the sensor probe, when the temperature field inside the furnace is uniform and stable, the heat exchange rate between the temperature sensor probe and the surrounding medium is constant. There will be no imbalance in heat exchange due to sudden changes in local temperature. At the same time, the uniform temperature field generated by the gradually increasing waste heat from combustion can further eliminate temperature deviations near the installation location of the temperature sensor, avoiding carbonization temperature deviations caused by local high or low temperature areas inside the furnace. Thus, when the temperature sensor detects the carbonization temperature, it can fully reflect the true temperature state inside the furnace, avoiding the situation where the temperature field inside the carbonization furnace is disordered due to the fluctuating supply of waste heat, which would lead to distortion of the carbonization temperature detected by the temperature sensor and make it unable to accurately reflect the actual carbonization temperature inside the carbonization furnace.

[0024] The present invention further considers that, in order to ensure the complete pyrolysis reaction of straw, the biochar fixed carbon content and pore structure and other core indicators meet the standards and achieve the harmless treatment standard during the carbonization process of straw in the carbonization furnace, in one embodiment, the above step S4 also sets a precise carbonization range for the carbonization temperature in the carbonization furnace; however, since the heat transfer between the incinerator and the carbonization furnace needs to be achieved through physical processes such as heat conduction and heat radiation from the furnace wall, and the furnace material has inherent thermal inertia, the carbonization temperature will inevitably lag behind the incineration temperature when the incineration temperature changes. In order to accurately analyze the corresponding lag time and determine whether the straw can be carbonized at a stable pyrolysis rate within the preset process cycle; The specific working principle of step S4 above is as follows: Thanks to the steady increase in combustion temperature during step S3, although the combustion temperature gradually increases, the entire heating process strictly follows the principle of step-by-step heating and thermal inertia matching. The rate of temperature increase remains constant and controllable, without any sudden increases or fluctuations. The temperature gradient between the incinerator and the carbonization furnace maintains a stable trend. Core physical parameters such as the furnace's heat transfer coefficient and thermal resistance do not undergo abrupt changes. The path and efficiency of heat transfer to the carbonization furnace through heat conduction and radiation remain stable. Simultaneously, the steady heating effectively avoids interference factors such as airflow disturbances and heat loss fluctuations caused by sudden temperature changes, ensuring a clear and stable temporal correspondence between combustion temperature changes and carbonization temperature responses. Therefore, step S4 receives the continuously collected combustion and carbonization temperatures from step S1; and synchronously divides the combustion temperature sequence and carbonization temperature sequence into multiple sub-temperature sequences of equal duration using the time window set in step S2. Specifically: From the initial time node to when the incineration temperature first exceeds the incineration range, the continuously collected incineration temperature and carbonization temperature in step S1 form an incineration temperature sequence. Carbonization temperature sequence ; The total number of samples corresponding to the time window in receiving step S2 Divide the incineration temperature sequence separately Carbonization temperature sequence To construct multiple temperature subsequences containing m sampling points, the process involves first selecting m consecutive sampling points from the incineration and carbonization temperature sequences, starting from the initial sampling time. Then, starting from the next unselected sampling time, the selection of m consecutive sampling points is repeated, thus constructing multiple temperature subsequences containing m sampling points. The expression for the k-th subsequence is: The kth incineration subsequence ; The kth carbonized subsequence ; For each set of corresponding incineration and carbonization sub-temperature sequences, cross-correlation analysis is used to calculate its core lag time sequentially. Specifically: using the sampling interval in step S1 as the minimum lag time, and using the minimum lag time as the starting and incrementing step size, multiple different lag times are generated; cross-correlation analysis is used to calculate the incineration sub-sequence of the k-th sub-sequence under different lag times. , char subsequence The correlation coefficient between them is such that the maximum correlation coefficient corresponds to the optimal time-series matching state between the incineration temperature and the carbonization temperature. Therefore, the lag time corresponding to this time is the core lag time of the kth subsequence. Lag duration is At that time, the incineration subsequence , char subsequence The correlation coefficient between them is: ; in: Lag duration The corresponding sampling point offset (i.e., the number of sampling points where the incineration temperature leads the carbonization temperature). For incineration subsequence The mean; The carbonized subsequence after a lag of d sampling points The mean; By comparing the core lag times corresponding to multiple consecutive sub-temperature sequences, we can analyze whether the core lag times are in a stable state (i.e., the values ​​of multiple consecutive core lag times do not fluctuate significantly). If the core lag times are stable, we can define a lag interval, specifically: Calculate the core lag duration of N consecutive sets The relative volatility coefficient is used to set a stability threshold; if the relative volatility coefficient is less than or equal to the stability threshold, the core lag duration is determined to be in a stable state, and the maximum and minimum values ​​among the N sets of core lag durations are set as the lag interval. N consecutive core lag durations relative volatility coefficient ,in For N groups of core lag duration The mean, The corresponding standard deviation; When the subsequent incineration temperature is stable within the incineration range, the time stamp of the incineration temperature entering the incineration range is used as the benchmark. The time node when the carbonization temperature will change accordingly is calculated by combining the lag interval, and it is determined whether the carbonization temperature at the corresponding time node is within the carbonization range. If the carbonization temperature is less than the lower limit of the carbonization range, a control command is immediately output to drive the ventilation volume adjustment actuator to increase the ventilation volume in order to increase the incineration temperature. After each increase in ventilation volume, the trend of carbonization temperature change is re-predicted based on the lag interval to determine whether it can enter the carbonization range, until the predicted carbonization temperature is stable within the carbonization range. Furthermore, if the combustion temperature exceeds the combustion range after the ventilation volume is increased, it indicates that there is an abnormal decrease in heat transfer efficiency in the heat conduction link between the carbonization furnace and the incinerator. Specifically, the excessive heat generated by the incinerator cannot be transferred to the carbonization furnace in time through heat conduction and heat radiation from the furnace wall, causing heat to accumulate in the incinerator. In this case, an alert signal will be immediately output to prompt the operator to intervene in time to check the fault in the heat conduction link and adjust the operating parameters to ensure the safe and stable operation of the system.

[0025] To avoid the problems mentioned above, such as incomplete capture of incineration temperature change trends and interference of instantaneous fluctuations with average temperature calculations due to unreasonable time window settings (e.g., time window size not covering temperature fluctuation cycles, sliding step size not matching sampling frequency), leading to control command judgment errors, and the lack of adaptability in setting fluctuation and stability thresholds causing frequent incineration temperature oscillations or exceeding the process range, as well as the failure to combine actual inactivation requirements and carbonization product quality targets in setting incineration and carbonization zones, resulting in incomplete elimination of insect eggs and pathogens, and substandard fixed carbon content in biochar, and the mismatch between parameter settings and the characteristics of mobile processing equipment such as furnace thermal inertia and sampling frequency fluctuations, ultimately leading to insufficient data for lag time analysis, unstable waste heat transfer, and uncontrolled carbonization process, the following working principles for setting time windows, fluctuation thresholds, stability thresholds, incineration zones, and carbonization zones are further proposed to address these issues: When setting the time window in step S2, methods such as the sliding counting window method and the rolling counting window method can be used. Specifically, considering the sampling frequency of straw burning temperature, the thermal response cycle of the burning-carbonization system, and the analysis requirements of lag time, the sliding counting window method is preferred. First, determine the fixed number of sampling points covering 3-5 burning temperature change cycles as the window size through experimental calibration (e.g., 15-20 sampling points to ensure complete coverage of temperature fluctuations). Then, dynamically extract continuous burning temperature data with a sliding step size of 3-5 sampling points, while ensuring the window size is not less than the minimum data required for the cross-correlation analysis in step S4. If the sampling frequency fluctuates, a rolling counting window method can be used. Set a fixed number of sampling points (e.g., 12-18) as the window size. A complete window is generated when the corresponding number of temperature data is accumulated. There is no need to rely on a fixed time interval. This ensures that the time window can not only fully capture the real trend of incineration temperature change and filter the interference caused by instantaneous temperature fluctuations, ensuring the accuracy of the average incineration temperature calculation and the rationality of the control command judgment in step S2, but also provide a temperature subset with complete time series, high data matching degree and sufficient sample size for the cross-correlation analysis of incineration temperature and carbonization temperature sequences when analyzing the lag time in step S4. When setting the fluctuation threshold and stability threshold in step S3, statistical analysis, empirical calibration, and system characteristic adaptation methods can be used. Specifically: First, collect historical data on combustion temperature under different ventilation volumes and different straw feed amounts during straw burning. Calculate the standard deviation and range of temperature data using statistical analysis. For example, use 2-3 times the standard deviation as the initial fluctuation threshold, and adjust and optimize it in conjunction with the maximum allowable temperature fluctuation range (to avoid affecting the stability of residual heat transfer). When using the empirical calibration method, refer to the threshold parameters of similar straw burning equipment, and initially set them in conjunction with the furnace structure and thermal inertia characteristics of the mobile processing equipment. Then, test the rationality of the threshold through multiple trial runs. If frequent adjustments occur, appropriately relax the threshold; if the temperature fluctuation exceeds the limit, tighten the threshold. The system characteristic adaptation method needs to consider the thermal response speed of the incinerator. For equipment with large thermal inertia, set the fluctuation threshold to ±3%-5% of the target temperature, and the stability threshold to 0.6-0.8 times the fluctuation threshold to prevent the system from frequently oscillating at the threshold edge and ensure that the combustion temperature fluctuates stably without exceeding the process tolerance range.

[0026] In steps S2 and S4, the incineration and carbonization zones can be set using experimental calibration, industry standard reference, or target product-oriented methods. Specifically: the experimental calibration method involves conducting straw incineration inactivation experiments at different temperatures, setting the lower limit of the incineration zone as the lowest temperature capable of 100% killing insect eggs and pathogens, and the upper limit as the highest temperature to avoid excessive burning of straw and the generation of large amounts of harmful gases, thus determining the incineration zone (e.g., 550℃-650℃). Simultaneously, through straw carbonization experiments at different temperatures, the carbonization zone (e.g., 350℃-500℃) is determined by the temperature range where the fixed carbon content of biochar meets the standard and the pore structure is optimal. The industry standard reference method directly uses relevant industry standards for the harmless treatment of agricultural straw and biomass carbonization, and fine-tunes the zone parameters based on the processing capacity of this equipment to ensure compliance with environmental protection and product quality requirements. The target product-oriented method, if the core objective is efficient inactivation, can appropriately raise the lower limit of the incineration zone; if the focus is on preparing high-quality biochar, it optimizes the temperature gradient of the carbonization zone, balancing the dual needs of harmless incineration and resource utilization through carbonization.

[0027] In summary: In this invention, step S1 first synchronously detects the corresponding incineration and carbonization temperatures in the incinerator and carbonization furnace at the same sampling time. After the detection is completed, step S2 sets the incineration range for killing insect eggs and pathogens in the straw (this range is determined based on experimental data on the critical temperature and duration of inactivation of insect eggs and pathogens, for example, above 550℃, it needs to be maintained for 10-15 minutes). By comparing the detected incineration temperature and the incineration range in real time, it is determined whether the current incineration temperature meets the heat intensity requirements for harmless treatment. If the incineration temperature does not reach the incineration range and cannot effectively kill harmful organisms, a control signal is further output to adjust the ventilation volume (increasing the ventilation volume can improve the oxygen supply efficiency of incineration and promote the full combustion of straw to increase the temperature), so that the incineration temperature inside the incinerator can be stably maintained within the incineration range, ensuring that insect eggs and pathogens in the straw are completely inactivated. Furthermore, during the process of adjusting straw burning and ventilation, step S3 further analyzes the fluctuation range of multiple consecutive burning temperatures and constrains the fluctuation range through a fluctuation threshold. This ensures that the burning temperature in the initial burning stage increases steadily and continuously, allowing the straw to gradually transition from low-temperature preheating to high-temperature burning. This further avoids sudden increases or decreases in burning temperature caused by factors such as a sudden increase in ventilation or a sudden change in straw feed, preventing heat waste and thermal shock to the equipment caused by incomplete or excessive combustion in the incinerator. Additionally, since the carbonization temperature in the carbonization furnace is transferred through the waste heat of the incinerator... Therefore, the continuous and gradual increase in combustion temperature allows the straw in the carbonization furnace to receive a gentle and continuous heat supply, achieving a slow and uniform pre-carbonization reaction. This further avoids the production of a large amount of tar due to instantaneous high-temperature pyrolysis of straw (tar easily clogs the exhaust channels of the carbonization furnace and reduces the quality of biochar). At the same time, by heating the carbonization furnace evenly and slowly, the temperature field distribution inside the furnace will be more uniform. At this time, the carbonization temperature detected by the temperature sensor can accurately match the actual thermal state inside the furnace, avoiding problems such as local temperature unevenness caused by the installation position deviation of the temperature sensor inside the carbonization furnace or the accumulation of straw, which would cause the carbonization temperature detection data to be distorted. More specifically, step S4 in this invention benefits from the steady increase control of the combustion temperature in step S3 (stable heating rate, no instantaneous fluctuations), which can accurately analyze the lag interval between the combustion temperature and the carbonization temperature during the carbonization process. After setting the lag interval, combined with the time sequence relationship between the real-time combustion temperature and the lag interval, it can accurately determine whether the response of the carbonization temperature conforms to the normal heat transfer law. If the combustion temperature is within the combustion interval but the carbonization temperature does not change synchronously according to the lag interval, it indicates that there is an abnormal decrease in heat transfer efficiency in the heat conduction link between the carbonization furnace and the incinerator (such as ash accumulation on the furnace wall, coking on the heat transfer surface, etc.). Then, through early warning and parameter adjustment, it can further solve the problems of insufficient carbonization and substandard biochar quality caused by the failure of waste heat transfer, and at the same time avoid the equipment safety risks caused by heat accumulation in the incinerator.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rural straw mobile incineration and carbonization collaborative treatment method, characterized in that, The method comprises the following steps: S1, using temperature sensor A and temperature sensor B to detect the incineration temperature and carbonization temperature in real time, and the sampling time stamp of each detection is the same, and the sampling interval between adjacent sampling time stamps is the same; S2, receiving the incineration temperature detected in real time in step S1, and setting a time window and an incineration interval; according to the time window, the incineration temperature detected in step S1 is called out, and the average incineration temperature in the time window is calculated; comparing the average incineration temperature with the incineration interval to determine whether a control instruction needs to be output; S3, calculating the fluctuation amplitude corresponding to the multiple incineration temperatures in the time window, and setting a fluctuation threshold; comparing the fluctuation amplitude with the fluctuation threshold to determine whether an adjustment instruction needs to be output, and adjusting the adjustment amplitude of the air volume control instruction in step S2 through the adjustment instruction; S4, setting a carbonization interval; receiving the incineration temperature and carbonization temperature collected in step S1; and dividing the incineration temperature sequence and the carbonization temperature sequence into multiple equal-length sub-temperature sequences according to the time window set in step S2; for each corresponding incineration and carbonization sub-temperature sequence, the core lag time is calculated in turn by using the cross-correlation analysis method, and the lag interval is set according to the multiple core lag times; When the incineration temperature in step S1 is stable in the preset incineration interval, the time stamp when the incineration temperature enters the incineration interval is taken as the reference, the carbonization temperature is calculated according to the time node when the corresponding change will occur, and it is judged whether the carbonization temperature at the corresponding time node is in the carbonization interval, whether the control instruction needs to be output, and the reminding signal.

2. The rural straw mobile incineration and carbonization synergistic treatment method according to claim 1, characterized in that: The step S2 sets a time window as , and calculates a total number of samples in the time window as , wherein is the sampling interval in the step S1, is a floor function. receiving the plurality of successively detected incineration temperatures in step S1 , sequentially call out one incineration temperature, consisting of a temperature subset within a time window: ; calculating an average incineration temperature wherein the incineration temperature corresponding to the i-th sampling point within the time window; and the incineration temperature corresponding to the i-th sampling point within the time window; and Comparing the average incineration temperature with the preset incineration interval: if the average incineration temperature is greater than the upper limit of the incineration interval, and the average incineration temperature is less than the lower limit of the incineration interval, a control instruction is output to the air volume adjustment execution mechanism.

3. The rural straw mobile incineration and carbonization synergistic treatment method according to claim 2, characterized in that: The first incineration temperature in the incineration temperature is taken as the starting point, and then the same number of continuous incineration temperatures as the total number of samples m are selected, and each time the next incineration temperature of the current starting incineration temperature is taken as the new starting point, and m continuous incineration temperatures are repeatedly selected, so as to sequentially form the temperature subsets corresponding to different time windows.

4. The rural straw mobile incineration and carbonization synergistic treatment method according to claim 2, characterized in that: The step S3 calculates the fluctuation amplitude corresponding to the multiple incineration temperatures in the time window: first, the absolute value of the temperature difference between the adjacent two sampling times in the window is calculated, and the average of the multiple absolute values is obtained to obtain the fluctuation amplitude; Comparing the fluctuation amplitude with the fluctuation threshold to determine whether an adjustment instruction needs to be output: if the fluctuation amplitude is greater than the fluctuation threshold, an adjustment instruction is output, and the adjustment amplitude of the original air volume control instruction is corrected through the adjustment instruction, so that the fluctuation amplitude of the incineration temperature after the output adjustment instruction is less than the fluctuation threshold.

5. The rural straw mobile incineration and carbonization synergistic treatment method according to claim 4, characterized in that: The step S4 receives the initial time node to the incineration temperature initial ≥ the incineration interval, and the incineration temperature and the carbonization temperature continuously collected in the step S1 form the incineration temperature sequence , the carbonization temperature sequence ​ the total number of samples corresponding to the time window in the receiving step S2 , respectively dividing the incineration temperature sequence ; the carbonization temperature sequence is a plurality of temperature subsequences containing m sampling points, wherein the kth subsequence is as follows: kth incineration sub-sequence ; The kth carbonized sub-sequence .

6. The rural straw mobile incineration and carbonization synergistic treatment method according to claim 5, characterized in that: In the process of dividing multiple sub-temperature sequences containing m sampling points in step S4, first, the incineration temperature sequence and the carbonization temperature sequence are selected from the same continuous m sampling points according to the initial sampling time as the starting point, and then the next unselected sampling time is taken as the starting point, and the continuous m sampling points are repeatedly selected, so as to construct multiple temperature sub-sequences containing m sampling points.

7. The rural straw mobile incineration and carbonization synergistic treatment method according to claim 6, characterized in that: In step S4, for each corresponding incineration and carbonization sub-temperature sequence, the core lag time is calculated in turn by using the cross-correlation analysis method, specifically: taking the sampling interval in step S1 as the minimum lag time, and taking the minimum lag time as the starting point and the incremental step, a plurality of different lag times are generated; The cross-correlation analysis calculates the correlation coefficient between the kth sub-sequence and the incineration sub-sequence at different lag lengths , and the carbonization sub-sequence . The lag length corresponding to the maximum correlation coefficient is set as the core lag length of the kth sub-sequence.

8. The rural straw mobile incineration and carbonization synergistic treatment method according to claim 7, characterized in that: The lag time in the step S4 is the incineration sub-sequence , the carbonization sub-sequence The correlation coefficient between them is: ； Among them: for the hysteresis length a corresponding number of sample point offsets; for incineration sub-sequence the mean value; the mean of the carbonization subsequence lagged d samples .

9. The rural straw mobile incineration and carbonization synergistic treatment method according to claim 7, characterized in that: The step S4 compares the core lag time corresponding to the plurality of groups of continuous sub-temperature sequences, and analyzes whether the core lag time is in a stable state; if the core lag time is stable, a lag interval is set, and specifically: Calculate relative fluctuation coefficients of the N groups of core lag time lengths If the relative fluctuation coefficient is less than or equal to the stability threshold, it is determined that the core lag time length is in a stable state, and the maximum value and the minimum value of the N groups of core lag time lengths are set as the lag interval. N groups of core lag lengths relative coefficient of fluctuation wherein is the mean of the N groups of core lag lengths is the corresponding standard deviation.​ 10. The rural straw mobile incineration and carbonization synergistic treatment method according to claim 9, characterized in that: In the step S4, when the incineration temperature in the step S1 is stable in the preset incineration interval, the time stamp of the incineration temperature entering the incineration interval is taken as a reference, the time node at which the carbonization temperature is about to change is calculated in combination with the lag interval, and it is judged whether the carbonization temperature at the corresponding time node is in the carbonization interval; if the carbonization temperature is less than the lower limit of the carbonization interval, a control instruction is output for driving the ventilation quantity adjusting actuator to increase the ventilation quantity; and after the ventilation quantity is increased each time, the change trend of the carbonization temperature is re-predicted based on the lag interval, and it is judged whether the carbonization temperature can enter the carbonization interval, until the predicted carbonization temperature is stable in the carbonization interval range; After the control instruction is output in the step S4, if the ventilation quantity is increased and the incineration temperature rises to the upper limit of the incineration interval and above, it indicates that the heat transfer link between the carbonization furnace and the incineration furnace has a problem of abnormal attenuation of heat transfer efficiency, and a prompt signal is output.

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