Method and system for improving stability of waste incineration steam and storage medium

Abstract

The invention discloses a method for improving the stability of waste incineration steam, which comprises the following steps: step 1, a waste incineration system calculates and obtains a target total heat value of waste based on a set target evaporation capacity and a target excess air ratio; 2, based on the current working condition of the waste incineration system, the real-time total heat value of the waste is obtained through calculation, and then the target primary air flow, the target secondary air flow and the waste feeding amount are obtained through calculation; and 3, an air door baffle is controlled based on the target primary air flow and the target secondary air flow, and the garbage feeding amount is controlled based on the garbage feeding amount, so that the working condition of the garbage incineration system approaches the target evaporation amount and the target air excess rate. Intelligent control over the waste incineration process can be achieved, the labor intensity of front-line operators is reduced, the waste incineration skill threshold is reduced, and the standard deviation value of moderate steam generation amount fluctuation is reduced as the target.

Description

Technical Field

[0001] This invention relates to the field of waste incineration technology. Background Technology

[0002] Steam stability faces numerous challenges during waste incineration. Waste composition is complex and variable, with significant differences in calorific value, moisture content, and particle size, making stable control of the combustion process difficult. Fluctuations in waste calorific value alter the combustion intensity within the furnace, causing fluctuations in steam output and parameters. Excessive moisture content in waste not only requires additional heat for evaporation but may also lead to incomplete combustion, similarly affecting steam stability. Traditional waste incineration control methods often struggle to quickly and accurately address these complex and variable conditions, resulting in significant fluctuations in key parameters such as steam pressure and temperature. Insufficient steam stability can adversely affect subsequent power generation equipment or heating systems.

[0003] Currently, there are also many methods for controlling waste incineration based on multiple combustion variables. For example, the patent document with authorization announcement number CN110608444B, publication date June 22, 2021, entitled "A Model-Based Waste Incineration Control System," discloses a system including: a data acquisition device for acquiring combustion process data related to the combustion process of the incinerator; a model parameter optimization unit, including a model processing unit and a parameter optimization unit, wherein the model processing unit uses a dynamic combustion model to calculate output variables from the combustion process data as input variables, and the output variables predict combustion condition data related to the combustion conditions of the incinerator; the dynamic combustion model is a calculation model established based on the correlation between the combustion process data and the combustion condition data; and the parameter optimization unit calculates optimized control parameters for the incinerator based on the output variables; and an automatic control module for automatically controlling the incinerator based on the optimized control parameters.

[0004] However, similar methods are not suitable for models that can cover all possibilities when the types of waste being incinerated are too diverse. This can still cause fluctuations in the calorific value of the combustion. In terms of power generation, unstable steam parameters can reduce the efficiency of steam turbines, increase equipment wear and maintenance costs, and may even lead to equipment failure and shutdown, affecting the reliability of power supply. In the heating sector, unstable steam can cause uneven heating temperatures, affecting user experience and hindering the efficient use of energy and energy conservation and emission reduction.

[0005] Therefore, developing a method to effectively improve the stability of waste incineration steam has significant practical implications and application value. Summary of the Invention

[0006] This invention addresses the problems of large fluctuations in the calorific value of waste incineration boilers, as well as significant delay and inertia characteristics. It provides an automatic combustion control method for waste incineration systems that mitigates poor control performance and large fluctuations in operating parameters caused by large delays, large inertia, and model uncertainties.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: a method for improving the stability of waste incineration steam.

[0008] Step 1: The waste incineration system calculates the target total calorific value of the waste based on the set target evaporation rate and target excess air rate;

[0009] Step 2: Based on the current operating conditions of the waste incineration system, calculate the real-time total calorific value of the waste, and then calculate the target primary air flow rate, target secondary air flow rate, and waste feed rate.

[0010] Step 3: Control the damper based on the target primary air flow and target secondary air flow, and control the amount of waste fed based on the amount of waste fed, so that the operating conditions of the waste incineration system are close to the target evaporation rate and target excess air rate.

[0011] In step 1, the target excess air rate includes the primary wind excess rate and the secondary wind excess rate.

[0012] In step 2, the operating condition of the waste incineration system is the average of the historical waste incineration amount, evaporation amount, boiler outlet exhaust gas temperature, primary air flow rate, secondary air flow rate, primary air temperature, and burner fuel oil flow rate over the past three hours, which is used as the current waste incineration amount, boiler main steam flow rate, boiler outlet exhaust gas temperature, primary air flow rate, secondary air flow rate, primary air temperature, and burner fuel oil flow rate.

[0013] In step 2, the target primary airflow and target secondary airflow are calculated based on the amount of waste that needs to be burned, the total calorific value of the waste to be burned, and the air coefficient. Then, the airflow setting value of each damper is obtained by correcting the deviation between the target evaporation rate and the evaporation rate in the waste incineration system.

[0014] The method for calculating the unit calorific value of waste:

[0015] Total calorific value of waste = 2737.9507 × evaporation rate × 1000 + 1.8684 × (primary air flow rate + secondary air flow rate + 1400 + burner fuel oil flow rate × 10.6) × boiler outlet exhaust gas temperature - 54.265 × waste incineration rate - 1.315 × primary air flow rate × primary air temperature - 26.12 × secondary air flow rate - 36568 - 37039.3 × burner fuel oil flow rate.

[0016] The method for calculating the unit calorific value of waste is based on:

[0017] Total calorific value of waste = Boiler recovered heat + Flue gas lost heat + Radiation - Heat lost heat from hot slag - Sensible calorific value of waste - Sensible calorific value of primary air - Sensible calorific value of secondary air - Sensible calorific value of sealed - Leaking air - Combustion heat input.

[0018] Boiler recovered heat = Main steam heat of boiler + Wastewater heat of boiler = (Main steam enthalpy - Feedwater enthalpy) × Main steam flow rate of boiler + (Feedwater enthalpy - Feedwater enthalpy) × Main steam flow rate of boiler × (Blowout rate);

[0019] Heat loss from flue gas = flue gas flow rate × boiler outlet gas temperature × boiler outlet gas specific heat;

[0020] Heat loss due to radiation and slag = Total heat output × Radiation-to-slag loss ratio / 100;

[0021] Sensible heat of waste = Waste incineration volume × Average specific heat of waste × Waste temperature;

[0022] Sensible heat of primary air = Primary air flow rate × Primary air temperature × Primary air specific heat;

[0023] Sensible heat of secondary air = Secondary air flow rate × Secondary air temperature × Secondary air specific heat;

[0024] Sensible heat of leaked air = Sensible heat of leaked air × Sensible heat of leaked air × Sensible heat of leaked air;

[0025] Combustion heat input = Combustion fuel flow rate × Combustion fuel density × Combustion fuel calorific value + Unit combustion air volume × Combustion fuel flow rate × Combustion air temperature × Combustion air specific heat

[0026] A system for improving the stability of waste incineration steam is provided. The combustion zone of the incinerator includes a dry burning section, a combustion section, and a burnout section. A furnace is provided above the combustion zone. A secondary air inlet damper is provided inside the furnace. A primary air inlet damper is provided in the combustion zone. A pusher is provided at the inlet of the dry burning section. The incinerator is equipped with an ACC automatic combustion control device that controls the operation of the dampers and the pusher. The ACC automatic combustion control device executes the method for improving the stability of waste incineration steam.

[0027] A storage medium, the storage medium being a computer-readable storage medium for storing software program code for executing the method for improving the stability of waste incineration steam.

[0028] This invention enables intelligent control of the waste incineration process, aims to reduce the labor intensity of front-line operators and lower the skill threshold for waste incineration, and targets a moderate reduction in the standard deviation of steam generation fluctuations. Attached Figure Description

[0029] The following is a brief explanation of the content represented by each figure in this specification:

[0030] Figure 1 This is a schematic diagram of the incinerator section of a waste incineration system. Detailed Implementation

[0031] The following description, with reference to the accompanying drawings, details the specific implementation of the present invention, including the shape and structure of each component, the relative positions and connections between the parts, the function and working principle of each part, the manufacturing process, and the operation and use methods, to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of the present invention.

[0032] Due to the nonlinear, strongly coupled, and large time lag characteristics of the incineration process, it is difficult to construct a mechanism model, and the control settings of key parameters in the furnace (feed rate, grate speed of each section, and primary and secondary air volume) are not easy to master. Typically, manual experience is used to judge the operating conditions and then adjust the parameter settings. This method is inefficient and highly subjective, leading to substandard process indicators. From an application perspective, my country's waste-to-energy plants currently use the ACC (Automatic Combustion Control) system from developed countries. Normal operation of this system requires a stable calorific value of the waste entering the furnace. However, my country's waste sorting and treatment is not yet perfect, and the actual calorific value of the waste entering the furnace does not meet the ACC's normal operating standards. Therefore, operators usually adjust relevant parameters according to the ACC control concept and combined with experience to promote intelligent operation. Moreover, for intelligent control of the incineration process, simple loop stability control is insufficient to achieve coordinated control of multiple variables, thereby ensuring that energy recovery efficiency, exhaust emissions, and incineration quality meet the standards.

[0033] The main factors affecting the steam stability of waste incineration power generation include the following:

[0034] (1) Low level of automation: The waste incineration process is complex and involves multiple parameters. Relying on manual operation based on personnel experience, it mainly involves long intervals of operation and adjustments to local abnormal conditions, resulting in a certain degree of control lag. This can easily cause large fluctuations in key parameters or even abnormal conditions, making it difficult to ensure that the incineration is operating under optimal conditions.

[0035] (2) Unstable operation: The waste incineration conditions are unstable, with large fluctuations in main steam flow and furnace temperature. Manual operation relies on observing abnormal conditions to control and adjust, but it is difficult to achieve overall control in a short time, resulting in large fluctuations in the incineration process.

[0036] (3) Lack of expert guidance: The level of manual operation varies greatly, and it is highly dependent on individual skill. The time to recover from abnormal conditions to normal conditions varies, and there is a lack of effective guidance from expert experience.

[0037] The present invention improves the steam stability of waste incineration using an ACC (Automatic Combustion Control) constant evaporation rate mode. Based on the target evaporation rate set by the operator, the system calculates the calorific value of the waste. This calorific value represents the total calorific value of the waste based on the target evaporation rate, which is the heat generated by burning the waste to maintain the target evaporation rate. However, due to the poor stability of waste, the calorific value of different types and grades of waste fluctuates greatly. Therefore, it is necessary to calculate the current actual calorific value based on real-time data to obtain the unit calorific value of the waste. The target evaporation rate is the target main steam flow rate. Based on the target evaporation rate, the current calorific value of the waste calculated in real-time, and the current operating conditions of the waste incineration system, the real-time total calorific value of the waste is calculated. The operating conditions of the waste incineration system are the average values ​​of the historical waste incineration rate, evaporation rate, boiler outlet exhaust gas temperature, primary air flow rate, secondary air flow rate, primary air temperature, and burner fuel oil flow rate over the past three hours. By averaging historical data, the system's operational stability can be maximized.

[0038] Dividing the current calorific value of the waste by the current waste feed rate gives the current calorific value per unit of waste. This allows us to calculate the real-time waste feed rate for correction using the target total calorific value of waste divided by the calorific value per unit of waste. Then, we set parameters for the waste incineration rate, primary air excess rate, and secondary air excess rate. Based on the amount of waste to be burned, its calorific value, and air coefficient, we calculate the required primary and secondary air volume baselines. Finally, we correct for these using the deviation in the main steam flow rate to obtain the air volume setting value for each damper.

[0039] ACC (Automatic Combustion Control) selects the target excess air rate set by the operator. The target excess air rate includes the primary air excess rate and the secondary air excess rate. Based on the target excess air rate, the target primary air flow rate and the target secondary air flow rate are calculated to make the evaporation rate more stable.

[0040] The entire system is based on the SUN30 series waste incineration boiler, and the calorific value of waste is calculated.

[0041] Waste calorific value calculation:

[0042] Calorific value of waste (kJ / h) = (calorific value of waste per unit) × (amount of waste incinerated);

[0043] Calorific value of waste = (Heat recovered by boiler) + (Heat lost from flue gas) + (Heat lost from radiation and hot slag) - (Sensible heat of waste) - (Sensible heat of primary air) - (Sensible heat of secondary air) - (Sensible heat of sealed and leaking air) - (Combustion heat input)

[0044] In the formula:

[0045] A) Boiler recovered heat (kJ / h) = (Heat of main boiler steam) + (Heat of boiler wastewater) = {(Enthalpy of main boiler steam) - (Enthalpy of boiler feedwater)} × (Flow rate of main boiler steam) + {(Enthalpy of boiler water) - (Enthalpy of boiler feedwater)} × (Flow rate of main boiler steam) × (Blowout rate);

[0046] in:

[0047] Main vapor enthalpy ： 3212.6 [kJ / kg] (4.1MPa(a), 400℃) Boiler water enthalpy ： 2799 [kJ / kg] (4.35MPa(a) saturation) Water enthalpy ： 592.7 [kJ / kg] (0.37MPa(a) saturation) Boiler main steam flow ： Daily operation value [kg / h] Sewage discharge rate ： 0.02 [-] (Settings)

[0048] The setpoint is the manual setpoint, which is generally set to 0.02. The daily operating value refers to the hourly average of the main steam flow in the DCS report, and the same applies below.

[0049] B) Heat loss from flue gas (kJ / h) = (flue gas flow rate) × (boiler outlet gas temperature) × (boiler outlet gas specific heat);

[0050] The flue gas flow rate can be approximated using the following formula:

[0051] (Primary air volume + Secondary air volume + Sealing / Leakage air volume + Combustion-supporting air volume) / (1 - (Moisture content in gas) / 100);

[0052] The combustion air volume is obtained by multiplying the combustion oil flow rate by the unit combustion air volume.

[0053] B) Heat loss from flue gas (kJ / h) = (flue gas flow rate) × (boiler outlet gas temperature) × (boiler outlet gas specific heat);

[0054] The flue gas flow rate can be approximated using the following formula:

[0055] (Primary air volume + Secondary air volume + Sealing / Leakage air volume + Combustion-supporting air volume) / (1 - (Moisture content in gas) / 100);

[0056] The combustion air volume is obtained by multiplying the combustion oil flow rate by the unit combustion air volume.

[0057] in,

[0058] Primary air flow ： Daily operation value [Nm3 / h] Secondary air flow ： Daily operation value [Nm3 / h] Sealing and leakage airflow ： 1400 [Nm3 / h] (Design value) Moisture in gas ： 23.1 [%] (Set value) Boiler outlet gas temperature ： Daily operation value [℃]　（※） Boiler outlet gas specific heat ： 1.398 [kJ / Nm3 / ℃] Fuel flow ： Daily operation value [L / h] Unit combustion air volume ： 10.6 [Nm3 / L] (Set value)

[0059] C) Heat loss due to radiation and slag (kJ / h) = (Total heat output) × (Radiation-slag loss ratio) / 100;

[0060] in:

[0061] (Total heat output) = (Heat recovered by boiler) + (Heat lost from flue gas) + (Radiation loss - Heat lost from hot slag);

[0062] The above formula can be used to perform the following calculations:

[0063] (Radiation loss - Heat loss from hot slag) = {(Heat recovered by boiler) + (Heat loss from flue gas)} / {100 / (Radiation-to-heat loss ratio) - 1};

[0064] Radiation-to-slag loss ratio: 2.70% (set value);

[0065] D) Sensible heat of waste (kJ / h) = (Waste incineration capacity [kg / h]) × (Average specific heat of waste [kJ / kg / ℃]) × (Waste temperature [℃])

[0066] in:

[0067] (Average specific heat of waste) = {(Ash content % in waste) × (Specific heat of ash content) + (Combustible content % in waste) × (Specific heat of combustible content) + (Moisture content % in waste) × (Specific heat of moisture content)} / 100;

[0068] in,

[0069] Waste incineration volume ： Daily operation value [kg / h] Waste temperature ： 20 [℃] Ash content in waste ： 15 [%] (Design value) % of combustible components in waste ： 33 [%] (Design value) Moisture content in garbage ： 52 [%] (Design value) specific heat of ash ： 1.25 [kJ / kg / ℃] Combustible Partial Specific Heat ： 1.05 [kJ / kg / ℃] Specific heat of water ： 4.19 [kJ / kg / ℃]

[0070] E), Sensible heat of primary air (kJ / h) = (Primary air flow rate) × (Primary air temperature) × (Primary air specific heat);

[0071] in,

[0072] Primary air flow ： Daily operation value [Nm3 / h] Primary air temperature ： Daily operation value [℃] Primary air specific heat ： 1.315 [kJ / Nm3 / ℃]

[0073] F), Sensible heat of secondary air (kJ / h) = (Secondary air flow rate) × (Secondary air temperature) × (Specific heat of secondary air);

[0074] in,

[0075] Secondary air flow ： Daily operation value [Nm3 / h] Secondary air temperature ： 20 [℃] Secondary air specific heat ： 1.306 [kJ / Nm3 / ℃]

[0076] G), Sensible heat of sealed and leaking air (kJ / h) = (Sealed - Leaking air flow rate) × (Sealed - Leaking air temperature) × (Sealed - Leaking air specific heat);

[0077] in,

[0078] Sealing and leakage airflow ： 1400 [Nm3 / h] (Design value) Sealing and inlet air temperature ： 20 [℃] Sealing and air leakage specific heat ： 1.306 [kJ / Nm3 / ℃]

[0079] H) Combustion heat input (kJ / h) = (fuel oil flow rate) × (fuel oil density) × (fuel oil calorific value) + (unit combustion air volume) × (fuel oil flow rate) × (combustion air temperature) × (combustion air specific heat);

[0080] in,

[0081] Fuel flow ： Daily operation value [L / h] fuel density ： 0.86 [kg / L] (Set value) Fuel heating ： 42747 [kJ / kg] (Set value) Unit combustion air volume ： 10.6 [Nm3 / L] (Set value) Combustion air temperature ： 20 [℃] Combustion air specific heat ： 1.306 [kJ / Nm3 / ℃]

[0082] Combining the above formulas, the formula for calculating the calorific value of waste is as follows:

[0083] Total calorific value of waste (kJ) = 2737.9507 × ② × 1000 + 1.8684 × (④ + ⑥ + 1400 + ⑦ × 10.6) × ③ - 54.265 × ① - 1.315 × ④ × ⑤ - 26.12 × ⑥ - 36568 - 37039.3 × ⑦;

[0084] The calorific value per unit of waste can be calculated using the following formula:

[0085] Calorific value per unit of waste (kJ / kg) = Total calorific value of waste (kJ) / ①

[0086] In the formula:

[0087] ①——Waste incineration capacity, kg / h;

[0088] ②——Main steam flow rate of boiler, t / h;

[0089] ③——Boiler outlet exhaust gas temperature, °C;

[0090] ④——Primary air flow rate, Nm3 / h;

[0091] ⑤—Primary air temperature, °C;

[0092] ⑥——Secondary air flow rate, Nm3 / h;

[0093] ⑦——Burner fuel flow rate, L / h. The burner includes the combustion-supporting burner and the starter burner.

[0094] The verification results show that the error in the calculated calorific value of the designed waste heat generation is less than 2%.

[0095]

[0096] like Figure 1As shown, the combustion zone of the incinerator includes a dry-burning section, a combustion section, and a burnout section. A furnace is located above the combustion zone, and a secondary air inlet damper is installed inside the furnace. A primary air inlet damper is installed in the combustion zone. A pusher is installed at the inlet of the dry-burning section. The incinerator is equipped with an ACC automatic combustion control device that controls the operation of the dampers and the pusher. The ACC automatic combustion control device has a storage medium, which is a computer-readable storage medium for storing software program code. This software program code is used to execute the method for improving the stability of waste incineration steam. During control, the ACC automatic combustion control device executes the method for improving the stability of waste incineration steam.

[0097] During the control process, the primary air volume is matched with the waste combustion situation to maintain reasonable air distribution requirements and ensure stable boiler load. Primary air frequency control mainly regulates the main steam flow and furnace temperature. The role of secondary air is primarily to regulate oxygen content and assist in adjusting furnace temperature. During combustion, the oxygen content in the flue gas reflects the amount of air consumed by waste combustion, directly reflecting the combustion status within the furnace. Under good combustion conditions and high furnace temperature, oxygen content is relatively stable. Under poor combustion conditions and low furnace temperature, oxygen consumption is low, resulting in higher oxygen content in the exhaust gas. During stable combustion, oxygen content needs to be maintained between 4% and 6%. For conditions of excessively low or high furnace temperature, secondary air prioritizes temperature regulation to avoid low-temperature oil injection and high-temperature coking. Once the furnace temperature returns to normal, secondary air returns to oxygen regulation.

[0098] The feeder's interval stop time primarily regulates the amount of waste fed. Waste is affected by factors such as fermentation, humidity, and calorific value fluctuations, making adjustments impossible based solely on a single boiler load measurement point. The feeder's adjustment must be combined with the on-site waste inventory. Due to the significant lag in the waste incineration process, with a response cycle typically exceeding 30 minutes, this invention adjusts the feeder's feed rate in advance based on real-time calculated calorific value per unit of waste, preventing large fluctuations in operating conditions.

[0099] This invention achieves an incineration stability improvement of no less than 10% when the calorific value of waste is relatively stable; when the calorific value of waste is unstable, it automatically identifies abnormal operating conditions, provides the current best working method, and provides real-time feedback, reducing the labor intensity of on-site personnel by 90%.

[0100] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A method for improving the stability of waste incineration steam, characterized in that: Step 1: The waste incineration system calculates the target total calorific value of the waste based on the set target evaporation rate and target excess air rate; Step 2: Based on the current operating conditions of the waste incineration system, calculate the real-time total calorific value of the waste, and then calculate the target primary air flow rate, target secondary air flow rate, and waste feed rate. Step 3: Control the damper based on the target primary air flow and target secondary air flow, and control the amount of waste fed based on the amount of waste fed, so that the operating conditions of the waste incineration system are close to the target evaporation rate and target excess air rate.

2. The method for improving the stability of waste incineration steam according to claim 1, characterized in that: In step 1, the target excess air rate includes the primary wind excess rate and the secondary wind excess rate.

3. The method for improving the stability of waste incineration steam according to claim 1, characterized in that: In step 2, the operating condition of the waste incineration system is the average of the historical waste incineration amount, evaporation amount, boiler outlet exhaust gas temperature, primary air flow rate, secondary air flow rate, primary air temperature, and burner fuel oil flow rate over the past three hours, which is used as the current waste incineration amount, boiler main steam flow rate, boiler outlet exhaust gas temperature, primary air flow rate, secondary air flow rate, primary air temperature, and burner fuel oil flow rate.

4. The method for improving the stability of waste incineration steam according to claim 3, characterized in that: In step 2, the target primary airflow and target secondary airflow are calculated based on the amount of waste that needs to be burned, the total calorific value of the waste to be burned, and the air coefficient. Then, the airflow setting value of each damper is obtained by correcting the deviation between the target evaporation rate and the evaporation rate in the waste incineration system.

5. The method for improving the stability of waste incineration steam according to claim 1, 2, 3 or 4, characterized in that: The method for calculating the unit calorific value of waste: Total calorific value of waste = 2737.9507 × evaporation rate × 1000 + 1.8684 × (primary air flow rate + secondary air flow rate + 1400 + burner fuel oil flow rate × 10.6) × boiler outlet exhaust gas temperature - 54.265 × waste incineration rate - 1.315 × primary air flow rate × primary air temperature - 26.12 × secondary air flow rate - 36568 - 37039.3 × burner fuel oil flow rate.

6. The method for improving the stability of waste incineration steam according to claim 5, characterized in that: The method for calculating the unit calorific value of waste is based on: Total calorific value of waste = Boiler recovered heat + Flue gas lost heat + Radiation - Heat lost heat from hot slag - Sensible calorific value of waste - Sensible calorific value of primary air - Sensible calorific value of secondary air - Sensible calorific value of sealed - Leaking air - Combustion heat input.

7. The method for improving the stability of waste incineration steam according to claim 6, characterized in that: Boiler recovered heat = Main steam heat of boiler + Wastewater heat of boiler = (Main steam enthalpy - Feedwater enthalpy) × Main steam flow rate of boiler + (Feedwater enthalpy - Feedwater enthalpy) × Main steam flow rate of boiler × (Blowout rate); Heat loss from flue gas = flue gas flow rate × boiler outlet gas temperature × boiler outlet gas specific heat; Heat loss due to radiation and slag = Total heat output × Radiation-to-slag loss ratio / 100; Sensible heat of waste = Waste incineration volume × Average specific heat of waste × Waste temperature; Sensible heat of primary air = Primary air flow rate × Primary air temperature × Primary air specific heat; Sensible heat of secondary air = Secondary air flow rate × Secondary air temperature × Secondary air specific heat; Sensible heat of leaked air = Sensible heat of leaked air × Sensible heat of leaked air × Sensible heat of leaked air; Combustion heat input = Combustion fuel flow rate × Combustion fuel density × Combustion fuel calorific value + Unit combustion air volume × Combustion fuel flow rate × Combustion air temperature × Combustion air specific heat 8. A system for improving the steam stability of waste incineration, wherein the combustion zone of the incinerator includes a dry-burning section, a combustion section, and a burnout section; a furnace is provided above the combustion zone; a secondary air inlet damper is provided inside the furnace; a primary air inlet damper is provided in the combustion zone; a pusher is provided at the inlet of the dry-burning section; and the incinerator is equipped with an ACC automatic combustion control device for controlling the operation of the dampers and the pusher, characterized in that: The ACC automatic combustion control device performs the method for improving the stability of waste incineration steam as described in any one of claims 1-7.

9. A storage medium, said storage medium being a computer-readable storage medium for storing software program code, characterized in that: The software program code is used to perform the method for improving the stability of waste incineration steam as described in any one of claims 1-7.

Images