A method for calculating the composition of waste entering a waste incineration plant based on energy-mass balance

Abstract

The present invention discloses a method for calculating the components of incoming garbage in a waste incineration plant based on energy-mass balance. This method divides incoming garbage into four components: inert components, biological components, fossil components and water. Based on the energy and mass balance relationship between the combustion chemical reactions of biological components and fossil components of the garbage, this method constructs a mathematical model that characterizes the relationship between the operating data of the waste incineration plant, auxiliary combustion fuel data, boiler thermal efficiency, characteristic parameters of garbage elements, fixed parameters and the four components of incoming garbage. Monte Carlo random simulation was used to construct an operating data rationality verification module, and the Lagrangian method with penalty parameters was used to solve the model to obtain the proportion of the four components of incoming garbage. Compared with existing offline time-consuming methods such as manual sorting and selective dissolution, this method has higher accuracy, lower cost and simple operation, and realizes accurate carbon source identification in the waste incineration process.

Description

Technical Field

[0001] The present invention relates to the technical field of domestic waste incineration and carbon emission detection, and in particular to a method for calculating the composition of waste entering a waste incineration plant based on energy-quality balance. Background Art

[0002] Incineration power generation is one of the current mainstream waste treatment methods in the world, and its carbon emissions cannot be ignored. Unlike fossil fuels, domestic waste used as fuel for waste incineration power generation contains both fossil components such as plastics and rubber that are included in carbon emissions, and biological components such as kitchen waste and wood that have zero carbon properties. Therefore, by clarifying the content of biological components and fossil components in the waste incineration process, it is possible to accurately identify the carbon source of the waste incineration power generation process.

[0003] In recent years, the waste incineration industry has developed rapidly, and the carbon emissions and carbon reductions from waste incineration have attracted increasing attention. The dual attributes of carbon emissions and alternative emission reductions from waste incineration are one of the important topics of current research. Accurate carbon source identification in the waste incineration power generation process is the basis for calculating carbon emissions and carbon reductions from waste incineration.

[0004] However, the current garbage composition is complex, with large temporal and spatial fluctuations and obvious regional characteristics, making it challenging to accurately identify carbon sources. Traditional methods for identifying carbon sources in garbage incineration, such as manual sorting, selective dissolution, and radiocarbon methods, have disadvantages such as low accuracy, high cost, and inability to identify carbon sources in real time. Therefore, developing a method for accurately identifying carbon sources in complex garbage components is one of the key technologies that urgently needs to be solved in the field of carbon emissions from garbage incineration. Summary of the invention

[0005] In view of the problem that the existing technology is difficult to identify carbon sources in the waste incineration process at low cost, high precision and in real time, the present invention provides a method for calculating the components of waste entering the incineration plant based on the energy and mass balance relationship between the combustion chemical reactions of the biological components and fossil components of the waste.

[0006] The object of the present invention is achieved through the following technical scheme: A method for calculating the composition of waste entering a waste incineration plant based on energy-quality balance, comprising the following steps:

[0007] S1: Construct the energy and chemical reactions of the combustion of biological and fossil components of garbage under the operating conditions of the waste incineration plant

[0008] Mass balance relationship model;

[0009] S2: Data collection of waste incineration plants. According to the measurement points of the waste incineration plant operation data, obtain the waste incineration plant operation data involved in the energy-quality balance mathematical model; according to the use of auxiliary combustion fuel in the waste incineration plant, obtain the auxiliary combustion fuel data of the waste incineration plant; according to the analysis results of the waste elements in the waste incineration plant, obtain the characteristic parameters of the waste elements; according to the design parameters of the waste incineration plant, obtain the boiler thermal efficiency parameters; according to the energy-quality balance model, obtain the fixed parameters of the waste incineration plant;

[0010] S3: Performing a data rationality check on the acquired operation data. If the data fails the rationality check, calibrating the operation data measurement points, and re-acquiring the operation data and performing a rationality check;

[0011] S4: Use the operating data of the waste incineration plant that has passed the rationality test, the characteristic parameters of the waste elements, and the thermal efficiency of the boiler of the waste incineration plant to construct the objective function. The mathematical model built based on the energy-quality balance relationship is used as a constraint condition, and a penalty parameter is added to the objective function. The problem is solved iteratively. The penalty parameter is updated each iteration until the accuracy requirements are met, and the composition of each component of the waste entering the furnace is output.

[0012] Furthermore, the construction of the energy-quality balance relationship model under the operating conditions of the waste incineration plant specifically includes: according to the operating conditions of the waste incineration plant, the mathematical model characterizing the energy-quality balance relationship of the waste incineration plant is composed of seven equations, namely: mass balance equation, ash balance equation, carbon balance equation, energy balance equation, oxygen consumption equation, oxygen consumption and carbon dioxide production difference equation and water balance equation.

[0013] Furthermore, the mass balance equation characterizes the consistency of the total amount of input and output materials of the incinerator, and the formula is as follows:

[0014] ;

[0015] In the formula represents the mass fraction, and the subscript represents the corresponding garbage component. , , , : They are the mass proportions of inert components, biological components, fossil components and water, which are also the quantities to be determined in the model.

[0016] Furthermore, the ash balance equation characterizes the transformation of inert components during the incineration process, and the formula is as follows:

[0017] ;

[0018] In the formula, is the mass proportion of inert components in the waste entering the furnace;

[0019] Indicates the specified time The mass of incineration ash discharged from the internal waste incinerator, in ;

[0020] Indicates the specified time The mass of garbage put into the incinerator, in .

[0021] Furthermore, the carbon balance equation characterizes the conservation of carbon during the incineration process, and the formula is as follows when the auxiliary combustion fuel is considered:

[0022] ;

[0023] In the formula, and are the mass proportions of biological components and fossil components in the waste entering the furnace;

[0024] is the mass fraction of carbon in biomass waste, in units of ;

[0025] is the mass fraction of carbon in fossil waste, in units of ;

[0026] For the specified time Standard dry flue gas volume at the chimney of the internal waste incineration plant, in units of ;

[0027] , The specified time Average dry flue gas at standard condition at chimney position of internal waste incineration plant and Content, unit is ;

[0028] , The specified time Average air volume and Content, unit is ;

[0029] is the molar mass of carbon atom;

[0030] is the molar volume of an ideal gas under standard conditions;

[0031] is the molar mass of the auxiliary combustion gas fuel in the waste incineration plant, in units of ;

[0032] is the mass fraction of carbon in the auxiliary combustion gas fuel, in units of ;

[0033] For the specified time The amount of gas auxiliary fuel used in the internal waste incineration plant, in

[0034] is the mass fraction of carbon in the auxiliary combustion liquid fuel, in units of ;

[0035] For the specified time The amount of liquid auxiliary fuel used in the internal waste incineration plant, in ;

[0036] Indicates the specified time The mass of garbage put into the incinerator, in .

[0037] Furthermore, the energy balance equation represents the balance between energy input and output during the incineration process. When the auxiliary combustion fuel is used, the formula is as follows:

[0038] ;

[0039] In the formula, , , They are the mass proportions of biological components, fossil components and water in the waste entering the furnace;

[0040] is the mass fraction of carbon in biomass waste, in units of ;

[0041] is the mass fraction of carbon in fossil waste, in units of ;

[0042] is the mass fraction of hydrogen in the biomass waste, in units of ;

[0043] is the mass fraction of hydrogen in fossil waste, in units of ;

[0044] is the mass fraction of oxygen in the biomass waste, in units of ;

[0045] is the mass fraction of oxygen in fossil waste, in units of ;

[0046] is the mass fraction of nitrogen in the biomass waste, in units of ;

[0047] is the mass fraction of nitrogen in fossil waste, in units of ;

[0048] is the mass fraction of sulfur in the biomass waste, in units of ;

[0049] is the mass fraction of sulfur in fossil waste, in units of ;

[0050] For the specified time Internal boiler steam quality, unit: ;

[0051] is the net enthalpy of steam cycle in the waste incineration plant, in ;

[0052] is the boiler thermal efficiency;

[0053] Indicates the specified time The mass of garbage put into the incinerator, in ;

[0054] is the average lower calorific value of gas auxiliary fuel, in units of ;

[0055] For the specified time The amount of gas auxiliary fuel used in the internal waste incineration plant, in ;

[0056] For the specified time The amount of liquid auxiliary fuel used in the internal waste incineration plant, in ;

[0057] is the average lower calorific value of liquid auxiliary fuel, in units of ;

[0058] For the specified time Internal permeate boiler back injection volume, unit: .

[0059] Furthermore, the oxygen consumption equation characterizes the oxygen consumption during the waste incineration process, and the formula considering the use of auxiliary combustion fuel is as follows:

[0060] ;

[0061] Where: and are the mass proportions of biological components and fossil components in the waste entering the furnace;

[0062] is the mass fraction of carbon in biomass waste, in units of ;

[0063] is the mass fraction of carbon in fossil waste, in units of ;

[0064] is the mass fraction of hydrogen in the biomass waste, in units of ;

[0065] is the mass fraction of hydrogen in fossil waste, in units of ;

[0066] is the mass fraction of oxygen in the biomass waste, in units of ;

[0067] is the mass fraction of oxygen in fossil waste, in units of ;

[0068] is the mass fraction of nitrogen in the biomass waste, in units of ;

[0069] is the mass fraction of nitrogen in fossil waste, in units of ;

[0070] is the mass fraction of sulfur in the biomass waste, in units of ;

[0071] is the mass fraction of sulfur in fossil waste, in units of ;

[0072] is the molar mass of carbon atom

[0073] is the molar mass of hydrogen atom;

[0074] is the atomic molar mass of oxygen;

[0075] is the atomic molar mass of nitrogen;

[0076] is the molar mass of sulfur atom;

[0077] For the specified time Standard dry flue gas volume at the chimney of the internal waste incineration plant, in units of ;

[0078] Indicates the specified time The mass of garbage put into the incinerator, in ;

[0079] , The specified time Average air volume and Content, unit is ;

[0080] , The specified time Average dry flue gas at standard condition at chimney position of internal waste incineration plant and Content, unit is ;

[0081] is the molar volume of an ideal gas under standard conditions;

[0082] is the molar mass of the auxiliary combustion gas fuel in the waste incineration plant, in units of ;

[0083] For the specified time The amount of gas auxiliary fuel used in the internal waste incineration plant, in ;

[0084] is the mass fraction of carbon in the auxiliary combustion gas fuel, in units of ;

[0085] is the mass fraction of hydrogen in the auxiliary combustion gas fuel, in units of ;

[0086] is the mass fraction of nitrogen in the auxiliary combustion gas fuel, in units of ;

[0087] For the specified time The amount of liquid auxiliary fuel used in the internal waste incineration plant, in ;

[0088] is the mass fraction of carbon in the auxiliary combustion liquid fuel, in units of ;

[0089] is the mass fraction of hydrogen in the auxiliary combustion liquid fuel, in units of ;

[0090] is the mass fraction of nitrogen in the auxiliary combustion liquid fuel, in units of ;

[0091] is the mass fraction of oxygen in the auxiliary combustion liquid fuel, in units of .

[0092] Furthermore, the oxygen consumption and carbon dioxide production difference equation characterizes the difference in the ratio of oxygen consumption to carbon dioxide production between biological components and fossil components. When auxiliary combustion fuel is used, the formula is as follows:

[0093] ;

[0094] Where: and are the mass proportions of biological components and fossil components in the waste entering the furnace;

[0095] is the molar mass of hydrogen atom;

[0096] is the atomic molar mass of oxygen;

[0097] is the atomic molar mass of nitrogen;

[0098] is the molar mass of sulfur atom;

[0099] is the mass fraction of hydrogen in the biomass waste, in units of ;

[0100] is the mass fraction of hydrogen in fossil waste, in units of ;

[0101] is the mass fraction of oxygen in the biomass waste, in units of ;

[0102] is the mass fraction of oxygen in fossil waste, in units of ;

[0103] is the mass fraction of nitrogen in the biomass waste, in units of ;

[0104] is the mass fraction of nitrogen in fossil waste, in units of ;

[0105] is the mass fraction of sulfur in the biomass waste, in units of ;

[0106] is the mass fraction of sulfur in fossil waste, in units of ;

[0107] For the specified time Standard dry flue gas volume at the chimney of the internal waste incineration plant, in units of ;

[0108] , The specified time Average dry flue gas at standard condition at chimney position of internal waste incineration plant and Content, unit is ;

[0109] , The specified time Average air volume and Content, unit is ;

[0110] Indicates the specified time The mass of garbage put into the incinerator, in ;

[0111] is the molar volume of an ideal gas under standard conditions;

[0112] is the molar mass of the auxiliary combustion gas fuel in the waste incineration plant, in units of ;

[0113] For the specified time The amount of gas auxiliary fuel used in the internal waste incineration plant, in ;

[0114] For the specified time The amount of liquid auxiliary fuel used in the internal waste incineration plant, in ;

[0115] is the mass fraction of hydrogen in the auxiliary combustion gas fuel, in units of ;

[0116] is the mass fraction of hydrogen in the auxiliary combustion liquid fuel, in units of .

[0117] Furthermore, the water balance equation characterizes the change in moisture content before and after waste incineration, and the formula considering the use of auxiliary combustion fuel is as follows:

[0118] ;

[0119] Where: , , : are the mass proportions of biological components, fossil components and water in the waste entering the furnace;

[0120] is the mass fraction of hydrogen in the biomass waste, in units of ;

[0121] is the mass fraction of hydrogen in fossil waste, in units of ;

[0122] is the molecular molar mass of water;

[0123] is the molar mass of hydrogen atom;

[0124] Indicates the specified time The mass of garbage put into the incinerator, in ;

[0125] For the specified time Flue gas flow rate at economizer outlet of internal waste incineration plant, unit: ;

[0126] is the absolute humidity of flue gas at the economizer outlet of the waste incineration plant, in units of ;

[0127] For the specified time Internal permeate boiler back injection volume, unit: ;

[0128] For the specified time The primary air flow rate of the internal waste incineration plant is ;

[0129] is the absolute humidity of the primary air in the waste incineration plant, in units of ;

[0130] For the specified time Secondary air flow rate of internal waste incineration plant, unit: ;

[0131] is the absolute humidity of the secondary air in the waste incineration plant, in units of ;

[0132] is the molar mass of the auxiliary combustion gas fuel in the waste incineration plant, in units of ;

[0133] is the mass fraction of hydrogen in the auxiliary combustion gas fuel, in units of ;

[0134] For the specified time The amount of gas auxiliary fuel used in the internal waste incineration plant, in ;

[0135] is the molar volume of an ideal gas under standard conditions;

[0136] is the mass fraction of hydrogen in the auxiliary combustion liquid fuel, in units of ;

[0137] For the specified time The amount of liquid auxiliary fuel used in the internal waste incineration plant, in .

[0138] Furthermore, the data rationality check of the acquired operation data specifically includes:

[0139] According to the fixed parameters of the waste incineration plant, the four components of the waste: inert components, biological components, fossil components, water mass fraction (ranging from 0% to 100%) and the characteristic parameters of the waste elements are used as variables. The Monte Carlo random simulation method is combined with the energy-mass balance mathematical model to obtain the reasonable range of the calorific value of the waste entering the incineration plant - the carbon content of the waste and the reasonable range of the calorific value of the waste entering the incineration plant - the oxygen consumption data;

[0140] When considering the use of auxiliary combustion fuel, the calculation formula for the lower calorific value corresponding to the operating data is as follows:

[0141] ;

[0142] In the formula, It represents the lower calorific value of the waste entering the incinerator represented by the operating data of the waste incineration plant, in units of ;

[0143] For the specified time Internal boiler steam quality, unit: ;

[0144] Indicates the specified time The mass of garbage put into the incinerator, in ;

[0145] is the net enthalpy of steam cycle in the waste incineration plant, in ;

[0146] is the boiler thermal efficiency;

[0147] is the average lower calorific value of gas auxiliary fuel, in units of ;

[0148] For the specified time The amount of gas auxiliary fuel used in the internal waste incineration plant, in ;

[0149] is the average lower calorific value of liquid auxiliary fuel, in units of ;

[0150] For the specified time The amount of liquid auxiliary fuel used in the internal waste incineration plant, in ;

[0151] When the auxiliary combustion fuel is used, the calculation formula for the carbon content of garbage corresponding to the operating data is as follows:

[0152] ;

[0153] In the formula, It represents the carbon content of the waste entering the incinerator represented by the operating data of the waste incineration plant, in units of ;

[0154] , The specified time Average dry flue gas at standard condition at chimney position of internal waste incineration plant and Content, unit is ;

[0155] , The specified time Average air volume and Content, unit is ;

[0156] For the specified time Standard dry flue gas volume at the chimney of the internal waste incineration plant, in units of ;

[0157] is the molar mass of carbon atom,

[0158] Indicates the specified time The mass of garbage put into the incinerator, in ;

[0159] is the molar volume of an ideal gas under standard conditions;

[0160] is the molar mass of the auxiliary combustion gas fuel in the waste incineration plant, in units of ;

[0161] For the specified time The amount of gas auxiliary fuel used in the internal waste incineration plant, in ;

[0162] is the mass fraction of carbon in the auxiliary combustion gas fuel, in units of ;

[0163] For the specified time The amount of liquid auxiliary fuel used in the internal waste incineration plant, in ;

[0164] is the mass fraction of carbon in the auxiliary combustion liquid fuel, in units of ;

[0165] When the auxiliary combustion fuel is used, the calculation formula for the oxygen consumption of garbage combustion corresponding to the operating data is as follows:

[0166] ;

[0167] In the formula, It represents the oxygen consumption of the garbage entering the incinerator represented by the operating data of the garbage incineration plant, in units of ;

[0168] is the mass fraction of hydrogen in the auxiliary combustion gas fuel, in units of ;

[0169] is the mass fraction of nitrogen in the auxiliary combustion gas fuel, in units of ;

[0170] is the mass fraction of hydrogen in the auxiliary combustion liquid fuel, in units of ;

[0171] is the mass fraction of nitrogen in the auxiliary combustion liquid fuel, in units of ;

[0172] is the mass fraction of oxygen in the auxiliary combustion liquid fuel, in units of ;

[0173] is the molar mass of hydrogen atom;

[0174] is the atomic molar mass of oxygen;

[0175] is the atomic molar mass of nitrogen;

[0176] The data relationship between the low calorific value-carbon content and the low calorific value-oxygen consumption of the incoming garbage represented by the current operating data is obtained, and the rationality of the current operating data is judged based on whether the data relationship falls within the theoretical reasonable range obtained by Monte Carlo random simulation.

[0177] Furthermore, the specific process of S4 includes:

[0178] The waste incineration plant operation data, waste element characteristic parameters and boiler thermal efficiency are combined into a data column vector, and the weighted least squares method is applied to form an objective function, including:

[0179] Calculate the variance-covariance matrix of the above data column vector, and use the inverse of the matrix as the weight matrix of the objective function. The objective function is as follows:

[0180] ;

[0181] Where:

[0182] A data column vector representing the combination of the acquired waste incineration plant operation data, waste element characteristic parameters and boiler thermal efficiency;

[0183] represents a column vector of data variables representing the operation data of the waste incineration plant, characteristic parameters of waste elements, and thermal efficiency of boilers;

[0184] The variance-covariance matrix representing the acquired waste incineration plant operation data, waste element characteristic parameters and boiler thermal efficiency data;

[0185] The mathematical model based on energy-quality balance needs to be used as the constraint condition of the objective function, including:

[0186] The mathematical model based on energy-quality balance is:

[0187] ;

[0188] Where:

[0189] It represents the functional relationship represented by the constructed 7 energy-mass balance equations;

[0190] A column vector of variables representing the mass fractions of the four components of the waste to be fed into the furnace (inert components, biological components, fossil components, and water);

[0191] A numerical column vector representing the fixed parameters of the waste incineration plant and the auxiliary combustion fuel data;

[0192] Then the objective function is updated as:

[0193]

[0194] Where:

[0195] represents the Lagrange multiplier

[0196] It is necessary to add penalty parameters to the objective function as constraint modulus coefficients and also as constraint conditions of the objective function, including:

[0197] The module value of the energy-quality balance mathematical model is defined as:

[0198] ;

[0199] Introducing penalty parameters , then the objective function is updated as:

[0200] ;

[0201] It is necessary to perform iterative solution, update penalty parameters, and update Lagrange multipliers until the calculation results meet the accuracy requirements, including:

[0202] After each iteration, check Update the penalty parameter based on the change compared to the previous iteration:

[0203] ;

[0204] In the formula, the superscript and Respectively represent The iterations and Iterations;

[0205] The Lagrange multipliers are then updated:

[0206] ;

[0207] To analyze the accuracy of the calculation results, it is necessary to The result of the next iteration needs to be compared with the result of the previous iteration until the relationship satisfies:

[0208] ;

[0209] Where:

[0210] Requires calculation accuracy.

[0211] Beneficial effects of the present invention:

[0212] The present invention provides a method for calculating the composition of waste entering a waste incineration plant based on energy-quality balance. When solving the problem of accurate carbon source identification in the waste incineration process, the present invention constructs a mathematical model that characterizes the relationship between the four components of waste incineration plant operation data, auxiliary combustion fuel data, waste element characteristic parameters, fixed parameters, boiler thermal efficiency and entering waste according to the energy-quality balance relationship under the operating state of the waste incineration plant. The present invention adopts the Monte Carlo random simulation method to construct a rationality test module for the operation data of the waste incineration plant, and constructs a Lagrangian algorithm with penalty parameters to solve the composition of the four types of waste components defined in the mathematical model, and obtains the mass fractions of inert components, biological components, fossil components and moisture of the waste entering the waste incineration plant, thereby realizing accurate carbon source identification in the waste incineration process and providing a data basis for the calculation of carbon emissions from the waste incineration plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0213] Figure 1 It is a flow chart of a method for calculating the composition of waste entering a waste incineration plant based on energy-quality balance provided by an embodiment of the present invention;

[0214] Figure 2 It is the overall simulation data of calorific value-carbon content of the operation data rationality test based on Monte Carlo random simulation provided by the embodiment of the present invention;

[0215] Figure 3 The embodiment of the present invention provides a specific reasonable range of calorific value-carbon content corresponding to the operating data for limiting the calorific value range and carbon content range of the incinerator garbage based on the historical data of the Chinese garbage incineration plants;

[0216] Figure 4 It is the overall simulation data of calorific value-oxygen consumption of the operation data rationality test based on Monte Carlo random simulation provided by the embodiment of the present invention;

[0217] Figure 5 The embodiment of the present invention provides a specific reasonable range of calorific value-oxygen consumption corresponding to the operating data for limiting the calorific value range and oxygen consumption range of the incinerator garbage based on the historical data of the Chinese garbage incineration plants;

[0218] Figure 6 It is a schematic diagram of a device for calculating the composition of waste entering an incineration plant based on energy-quality balance provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0219] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0220] like Figure 1As shown, the present invention provides a method for calculating the composition of incoming garbage in a waste incineration plant based on energy-mass balance, including the steps of collecting data from the waste incineration plant, checking the rationality of the operating data of the waste incineration plant, feedback of abnormal data, inputting the operating data into a mathematical model of energy-mass balance, iterative solution of a Lagrangian algorithm with a penalty parameter, and accuracy analysis of calculation results.

[0221] Specifically include:

[0222] S1, such as Figure 1 The energy-mass balance mathematical model shown is a mathematical model constructed based on the energy and mass balance relationship of the combustion chemical reaction of the biological component and the fossil component of the garbage under the operating conditions of the garbage incineration plant;

[0223] According to the operating conditions of the waste incineration plant, the mathematical model that characterizes the energy-mass balance relationship of the waste incineration plant is composed of seven equations, namely: mass balance equation, ash balance equation, carbon balance equation, energy balance equation, oxygen consumption equation, oxygen consumption and carbon dioxide production difference equation and water balance equation.

[0224] The mass balance equation characterizes the consistency of the total amount of material input and output of the incinerator, and the formula is as follows:

[0225]

[0226] In the formula,

[0227] In the formula represents the mass fraction, and the subscripts represent the corresponding garbage components. , , , : They are respectively the mass proportions of inert components, biological components, fossil components and water in the garbage entering the furnace, which are also the quantities to be determined in the model.

[0228] The ash balance equation characterizes the transformation of inert components during incineration, and the formula is as follows:

[0229]

[0230] In the formula,

[0231] It indicates the mass of incineration ash discharged from the garbage incinerator within a specified time, in units of ;

[0232] It indicates the mass of garbage put into the incinerator within a specified time, in units of .

[0233] The carbon balance equation characterizes the conservation of carbon during the incineration process. When the auxiliary combustion fuel is used, the formula is as follows:

[0234]

[0235] In the formula,

[0236] is the mass fraction of carbon in biomass waste, in units of ;

[0237] is the mass fraction of carbon in fossil waste, in units of ;

[0238] For the specified time Standard dry flue gas volume at the chimney of the internal waste incineration plant, in units of , where the subscript for Abbreviation for chimney gas, used as the symbol in the following formulas The subscripts all have the meaning of chimney gas;

[0239] , The specified time Average dry flue gas at standard condition at chimney position of internal waste incineration plant and Content, unit is ;

[0240] , The specified time Average air volume and Content, unit is ;

[0241] is the molar mass of carbon atom, which is 12.0107 ;

[0242] is the molar volume of an ideal gas under standard conditions, and its value is 22.414 ;

[0243] is the molar mass of the auxiliary combustion gas fuel in the waste incineration plant, in units of ;

[0244] is the mass fraction of carbon in the auxiliary combustion gas fuel, in units of ;

[0245] For the specified time The amount of gas auxiliary fuel used in the internal waste incineration plant, in

[0246] is the mass fraction of carbon in the auxiliary combustion liquid fuel, in units of ;

[0247] For the specified time The amount of liquid auxiliary fuel used in the internal waste incineration plant, in ;

[0248] The energy balance equation represents the balance between energy input and output during the incineration process. When auxiliary combustion fuel is used, the formula is as follows:

[0249]

[0250] In the formula,

[0251] is the mass fraction of hydrogen in the biomass waste, in units of ;

[0252] is the mass fraction of hydrogen in fossil waste, in units of ;

[0253] is the mass fraction of oxygen in the biomass waste, in units of ;

[0254] is the mass fraction of oxygen in fossil waste, in units of ;

[0255] is the mass fraction of nitrogen in the biomass waste, in units of ;

[0256] is the mass fraction of nitrogen in fossil waste, in units of ;

[0257] is the mass fraction of sulfur in the biomass waste, in units of ;

[0258] is the mass fraction of sulfur in fossil waste, in units of ;

[0259] For the specified time Internal boiler steam quality, unit: ;

[0260] is the net enthalpy of steam cycle in the waste incineration plant, in ;

[0261] is the boiler thermal efficiency;

[0262] is the average lower calorific value of gas auxiliary fuel, in units of ;

[0263] is the average lower calorific value of liquid auxiliary fuel, in units of ;

[0264] For the specified time Internal permeate boiler back injection volume, unit: ;

[0265] The oxygen consumption equation characterizes the oxygen consumption during the combustion process. When the auxiliary combustion fuel is used, the formula is as follows:

[0266]

[0267] Where:

[0268] is the atomic molar mass of hydrogen, which is 1.00794 ;

[0269] is the atomic molar mass of oxygen element, which is 15.9994 ;

[0270] is the atomic molar mass of nitrogen, which is 14.0067 ;

[0271] is the atomic molar mass of sulfur, which is 32.065 ;

[0272] is the mass fraction of hydrogen in the auxiliary combustion gas fuel, in units of ;

[0273] is the mass fraction of nitrogen in the auxiliary combustion gas fuel, in units of ;

[0274] is the mass fraction of hydrogen in the auxiliary combustion liquid fuel, in units of ;

[0275] is the mass fraction of nitrogen in the auxiliary combustion liquid fuel, in units of ;

[0276] is the mass fraction of oxygen in the auxiliary combustion liquid fuel, in units of ;

[0277] The oxygen consumption and carbon dioxide production difference equation characterizes the difference in the ratio of oxygen consumption to carbon dioxide production between biological components and fossil components. When auxiliary combustion fuel is used, the formula is as follows:

[0278]

[0279] The water balance equation characterizes the change in moisture content before and after waste incineration. The formula considering the use of auxiliary combustion fuel is as follows:

[0280]

[0281] Where:

[0282] is the molecular molar mass of water;

[0283] For the specified time Flue gas flow rate at economizer outlet of internal waste incineration plant, unit: ;

[0284] is the absolute humidity of flue gas at the economizer outlet of the waste incineration plant, in units of ;

[0285] For the specified time The primary air flow rate of the internal waste incineration plant is ;

[0286] is the absolute humidity of the primary air in the waste incineration plant, in units of ;

[0287] For the specified time Secondary air flow rate of internal waste incineration plant, unit: ;

[0288] is the absolute humidity of the secondary air in the waste incineration plant, in units of ;

[0289] S2, such as Figure 1The data collection of the waste incineration plant shown in the figure needs to obtain the waste incineration plant operation data involved in the energy-quality balance mathematical model based on the waste incineration plant operation data measurement points; it is necessary to obtain the auxiliary combustion fuel data of the waste incineration plant based on the use of auxiliary combustion fuel in the waste incineration plant; it is necessary to obtain the garbage element characteristic parameters based on the garbage element analysis results of the waste incineration plant; it is necessary to obtain the boiler thermal efficiency parameters based on the design parameters of the waste incineration plant; it is necessary to obtain the fixed parameters of the waste incineration plant based on the energy-quality balance model.

[0290] The waste incineration plant operation data refers to:

[0291] The quality of the incineration ash discharged from the waste incinerator ;

[0292] Quality of waste entering the incinerator ;

[0293] Standard dry flue gas flow rate at the chimney of a waste incineration plant ;

[0294] Average dry flue gas at standard condition at the chimney of a waste incineration plant and content, , ;

[0295] Average air quality at waste incineration plants and content, , ;

[0296] Steam Quality of Boiler in Waste Incineration Plant ;

[0297] Net enthalpy of steam cycle in waste incineration plants ;

[0298] Leachate boiler backflow from waste incineration plants ;

[0299] Flue gas flow rate at economizer outlet of waste incineration plant ;

[0300] Absolute humidity of flue gas at economizer outlet of waste incineration plant ;

[0301] Primary air flow rate of waste incineration plant ;

[0302] Absolute humidity of primary air in waste incineration plant ;

[0303] Secondary air flow rate of waste incineration plant ;

[0304] Absolute humidity of secondary air in waste incineration plant ;

[0305] The auxiliary combustion fuel data of the waste incineration plant refers to:

[0306] Molar mass of auxiliary combustion gas fuel in waste incineration plants ;

[0307] Auxiliary combustion gas fuel consumption in waste incineration plants ;

[0308] Mass fraction of carbon in auxiliary combustion gas fuel of waste incineration plant ;

[0309] Mass fraction of hydrogen in auxiliary combustion gas fuel of waste incineration plant ;

[0310] Mass fraction of nitrogen in auxiliary combustion gas fuel of waste incineration plant ;

[0311] Average lower calorific value of auxiliary combustion gas fuel in waste incineration plants ;

[0312] Liquid fuel consumption for auxiliary combustion in waste incineration plants ;

[0313] Mass fraction of carbon in liquid fuel for auxiliary combustion in waste incineration plants ;

[0314] Mass fraction of hydrogen in liquid fuel for auxiliary combustion in waste incineration plants ;

[0315] Oxygen mass fraction in liquid fuel for auxiliary combustion in waste incineration plants ;

[0316] Nitrogen mass fraction in liquid fuel for auxiliary combustion in waste incineration plants ;

[0317] Average lower calorific value of liquid fuel for auxiliary combustion in waste incineration plants ;

[0318] The waste element characteristic parameters of the waste incineration plant refer to:

[0319] Mass fraction of carbon in biomass waste ;

[0320] Mass fraction of hydrogen in biomass waste ;

[0321] Oxygen mass fraction in biomass waste ;

[0322] Nitrogen mass fraction in biomass waste ;

[0323] Sulfur content in biomass waste ;

[0324] Mass fraction of carbon in fossil waste ;

[0325] Mass fraction of hydrogen in fossil waste ;

[0326] Oxygen mass fraction in fossil waste ;

[0327] Nitrogen mass fraction in fossil waste ;

[0328] Sulfur content in fossil waste ;

[0329] The waste incineration plant design parameters refer to:

[0330] Thermal efficiency of boilers in waste incineration plants ;

[0331] The fixed parameters of the waste incineration plant are:

[0332] Molar mass of carbon atom ;

[0333] Molar mass of hydrogen atom ;

[0334] Molar mass of oxygen atom ;

[0335] Molar mass of nitrogen atom ;

[0336] Molar mass of sulfur atom ;

[0337] Molar mass of water ;

[0338] Molar volume of an ideal gas under standard conditions ;

[0339] S3, such as Figure 1The rationality test of the operating data of the waste incineration plant shown in the figure needs to be based on the fixed parameters of the waste incineration plant, with the mass fraction of the four components of the waste: inert components, biological components, fossil components, water (ranging from 0% to 100%) and the characteristic parameters of the waste elements as variables, and the Monte Carlo random simulation method is applied. Combined with the mathematical model of the energy and mass balance model, the reasonable range of the calorific value of the waste entering the furnace - the carbon content of the waste and the reasonable range of the calorific value of the waste entering the furnace - the oxygen consumption data of the waste entering the furnace are obtained.

[0340] Figure 2 The reasonable data range obtained by using the Monte Carlo random simulation method is shown. The data range formed by using 30,000 sets of simulation data and 60,000 sets of simulation data is not significantly different, so there is no need to continue to increase the data simulation amount. According to the historical data of the calorific value and carbon content of the waste entering the incineration plant in China, the reasonable data range is defined. The horizontal calorific value range is selected from 6-12MJ / kg of waste, and the vertical carbon content range is selected from 125-300g / kg of waste. According to the above definition, the data is obtained Figure 2 The upper and lower limits of the simulation data range corresponding to the range are obtained, and the reasonable range of the calorific value-carbon content data of the incoming garbage is finally applied to the rationality test of the operation data of this method, as shown in Figure 3 shown. Figure 3 The paper shows the reasonable range of calorific value and carbon content of the waste entering the furnace in real scenarios. The operation data obtained can be used to calculate the calorific value and carbon content to determine the Figure 3 The only point in the set of operation data can be determined by judging whether the point falls within a reasonable range to determine whether the set of operation data passes the rationality test of the carbon content of the garbage entering the furnace.

[0341] Figure 4 The reasonable data range obtained by using the Monte Carlo random simulation method is shown. The data range formed by using 30,000 sets of simulation data and 60,000 sets of simulation data is not significantly different, so there is no need to continue to increase the data simulation. According to the historical data of the calorific value and oxygen consumption of the waste entering the incineration plant in China, the reasonable data range is defined. The horizontal calorific value range is selected from 6-12MJ / kg of waste, and the vertical oxygen consumption range is selected from 15-35 mol O2 / kg of waste. According to the above definition, the Figure 4 The upper and lower limits of the simulation data range corresponding to the range are obtained, and the reasonable range of the calorific value-oxygen consumption data of the in-furnace garbage finally applied to the rationality test of the operation data of this method is obtained as follows: Figure 5 shown. Figure 5 The reasonable range of calorific value and oxygen consumption of the waste entering the furnace in real scenarios is demonstrated. The operation data obtained can be used to calculate the calorific value and oxygen consumption to determine the Figure 5 The only point in the data set can be determined by judging whether the point falls within a reasonable range to determine whether the set of operating data passes the rationality test of the oxygen consumption of the garbage entering the furnace.

[0342] Only operating data that have passed the rationality test of both the carbon content and oxygen consumption of the waste entering the furnace can be regarded as valid data. Otherwise, feedback is needed to be sent to the operation and maintenance personnel to check the operating data measurement points.

[0343] After obtaining the operating data of the waste incineration plant, the following three formulas are used for calculation:

[0344] (1) The formula for the lower calorific value of operating data when auxiliary combustion fuel is used is:

[0345]

[0346] In the formula, It represents the lower calorific value of the waste entering the incinerator represented by the operating data of the waste incineration plant, in units of ;

[0347] (2) Considering the use of auxiliary combustion fuel, the operating data corresponds to the carbon content of garbage:

[0348]

[0349] In the formula, It represents the carbon content of the waste entering the incinerator represented by the operating data of the waste incineration plant, in units of ;

[0350] (3) Considering the use of auxiliary combustion fuel, the operating data corresponds to the oxygen consumption of garbage combustion:

[0351]

[0352] In the formula, It represents the oxygen consumption of the garbage entering the incinerator represented by the operating data of the garbage incineration plant, in units of ;

[0353] The data relationship between the low calorific value of the incoming garbage and the carbon content and the low calorific value of the incoming garbage and the oxygen consumption corresponding to the current operation data can be obtained. According to whether the data relationship falls within the theoretical reasonable range obtained by Monte Carlo random simulation ( Figure 3 and Figure 5 ) Judge the rationality of current operating data.

[0354] If the current operating data passes the rationality test, the next step of calculation will be carried out. If it fails the rationality test, the data abnormality will be reported to the operation and maintenance personnel of the waste incineration plant, and the operation and maintenance personnel need to calibrate the operating data measurement points and then conduct the rationality test of the operating data again.

[0355] S4, such as Figure 1The Lagrangian algorithm with penalty parameters shown in the figure is iteratively solved. It is necessary to combine the operation data of the waste incineration plant, the characteristic parameters of the waste elements and the thermal efficiency of the boiler into a data column vector, and apply the weighted least squares method to form an objective function, including:

[0356] Calculate the variance-covariance matrix of the above data column vector, and use the inverse of the matrix as the weight matrix of the objective function. The objective function is as follows:

[0357]

[0358] Where:

[0359] A data column vector representing the combination of the acquired waste incineration plant operation data, waste element characteristic parameters and boiler thermal efficiency;

[0360] represents a column vector of data variables representing the operation data of the waste incineration plant, characteristic parameters of waste elements, and thermal efficiency of boilers;

[0361] The variance-covariance matrix representing the acquired waste incineration plant operation data, waste element characteristic parameters and boiler thermal efficiency data;

[0362] The mathematical model based on energy-quality balance needs to be used as the constraint condition of the objective function, including:

[0363] Assume that the mathematical model based on energy-quality balance is:

[0364]

[0365] Where:

[0366] It represents the functional relationship represented by the constructed 7 energy-mass balance equations;

[0367] A column vector of variables representing the mass fractions of the four components of the waste to be fed into the furnace (inert components, biological components, fossil components, and water);

[0368] A numerical column vector representing the fixed parameters of the waste incineration plant and the auxiliary combustion fuel data;

[0369] Then the objective function is updated as:

[0370]

[0371] Where:

[0372] represents the Lagrange multiplier

[0373] It is necessary to add penalty parameters to the objective function as constraint modulus coefficients and also as constraint conditions of the objective function, including:

[0374] Assume that the modulus of the energy-quality balance mathematical model is:

[0375]

[0376] Introducing penalty parameters , then the objective function is updated as:

[0377]

[0378] It is necessary to perform iterative solution, update penalty parameters, and update Lagrange multipliers until the calculation results meet the accuracy requirements, including:

[0379] After each iteration, check Update the penalty parameter based on the change compared to the previous iteration:

[0380]

[0381] In the formula, the superscript and Respectively represent The iterations and Iterations.

[0382] The Lagrange multipliers are then updated:

[0383]

[0384] E. Figure 1 The accuracy analysis of the calculation results shown in the figure requires comparing the nth iteration result with the previous iteration result until the relationship is satisfied:

[0385]

[0386] Where:

[0387] : is the calculation accuracy requirement (it can be changed according to the operating data of the waste incineration plant, here 1e-3 is taken as the calculation accuracy requirement)

[0388] The method can be terminated only when the Lagrange multiplier and penalty parameter are updated, and the next round of iteration is performed.

[0389] When the calculation accuracy requirements are met, the algorithm outputs the mass fractions of the four types of waste components (inert components, biological components, fossil components, and water) defined in the furnace, that is, the variables Column vector. Combined with the known mass of the incoming waste, the expected goal of calculating the mass of the incoming waste components can be achieved. Furthermore, the carbon source of the waste incineration process can be identified and the carbon emissions of the waste incineration plant can be calculated.

[0390] Corresponding to the aforementioned embodiment of a method for calculating the composition of incoming waste in a waste incineration plant based on energy-mass balance, the present invention also provides an embodiment of a device for calculating the composition of incoming waste in a waste incineration plant based on energy-mass balance.

[0391] See also Figure 6 An embodiment of the present invention provides a device for calculating the composition of incoming garbage in a waste incineration plant based on energy-mass balance, comprising a memory and one or more processors, wherein the memory stores executable code, and when the processor executes the executable code, it is used to implement a method for calculating the composition of incoming garbage in a waste incineration plant based on energy-mass balance in the above-mentioned embodiment.

[0392] The embodiment of the device for calculating the composition of incoming waste in a waste incineration plant based on energy-quality balance provided by the present invention can be applied to any device with data processing capability, and the device with data processing capability can be a device or apparatus such as a computer. The device embodiment can be implemented through software, or through hardware or a combination of software and hardware. Taking software implementation as an example, as a device in a logical sense, it is formed by the processor of any device with data processing capability in which it is located reading the corresponding computer program instructions in the non-volatile memory into the internal memory for execution. From a hardware perspective, if Figure 6 As shown, it is a hardware structure diagram of any device with data processing capability where a device for calculating the composition of waste entering a waste incineration plant based on energy-quality balance provided by the present invention is located, except Figure 6 In addition to the processor, memory, network interface, and non-volatile memory shown, any device with data processing capabilities in which the apparatus in the embodiments is located may also include other hardware, generally based on the actual functions of the device with data processing capabilities, which will not be described in detail.

[0393] The implementation process of the functions and effects of each unit in the above-mentioned device is specifically described in the implementation process of the corresponding steps in the above-mentioned method, and will not be repeated here.

[0394] For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The device embodiment described above is only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of the present invention. Ordinary technicians in this field can understand and implement it without paying creative work.

[0395] An embodiment of the present invention further provides a computer-readable storage medium having a program stored thereon. When the program is executed by a processor, a method for calculating the composition of waste entering an incineration plant based on energy-quality balance in the above-mentioned embodiment is implemented.

[0396] The computer-readable storage medium may be an internal storage unit of any device with data processing capability described in any of the aforementioned embodiments, such as a hard disk or a memory. The computer-readable storage medium may also be an external storage device of any device with data processing capability, such as a plug-in hard disk, a smart media card (SMC), an SD card, a flash card, etc. equipped on the device. Furthermore, the computer-readable storage medium may also include both an internal storage unit and an external storage device of any device with data processing capability. The computer-readable storage medium is used to store the computer program and other programs and data required by any device with data processing capability, and may also be used to temporarily store data that has been output or is to be output.

[0397] The present invention also provides a computer program product, including a computer program. When the computer program is executed by a processor, it implements the method for calculating the composition of waste entering a waste incineration plant based on energy-quality balance.

[0398] Those skilled in the art will readily appreciate other embodiments of the present application after considering the description and practicing the contents disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The description and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the claims.

[0399] It should be understood that the above general description and the detailed description below are only exemplary and explanatory and cannot limit the present application. The present application is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present application is limited only by the attached claims.

Claims

1. A method for calculating the composition of waste entering a waste incineration plant based on energy-quality balance, characterized in that: The following steps are involved: S1: Constructing the energy and mass balance relationship model based on the combustion chemical reaction of the biological component and fossil component of the garbage under the operating conditions of the garbage incineration plant, including: according to the operating conditions of the garbage incineration plant, the mathematical model characterizing the energy and mass balance relationship of the garbage incineration plant is composed of seven equations, namely: the mass balance equation, the ash balance equation, the carbon balance equation, the energy balance equation, the oxygen consumption equation, the oxygen consumption and carbon dioxide production difference equation and the water balance equation. The above equations include the carbon dioxide and water products of the complete combustion chemical reaction of carbon and hydrogen elements in the biological component and fossil component of the garbage; S2: Data collection of waste incineration plants: Based on the operating data measurement points of the waste incineration plants, obtain the operating data of the waste incineration plants involved in the energy-quality balance mathematical model; based on the use of auxiliary combustion fuels in the waste incineration plants, obtain the auxiliary combustion fuel data of the waste incineration plants; based on the analysis results of the waste elements in the waste incineration plants, obtain the characteristic parameters of the waste elements; based on the design parameters of the waste incineration plants, obtain the thermal efficiency parameters of the boilers; based on the energy-quality balance model, obtain the fixed parameters of the waste incineration plants; S3: Perform a data rationality check on the acquired operation data. If the rationality check fails, calibrate the operation data measurement points and re-acquire the operation data and perform a rationality check. Specifically, according to the fixed parameters of the waste incineration plant, the four components of the waste: the mass fraction of the inert component, the biological component, the fossil component, the water content and the characteristic parameters of the waste elements are used as variables. The Monte Carlo random simulation method is applied, combined with the energy-mass balance mathematical model, to obtain the reasonable range of the calorific value of the waste entering the incineration plant - the carbon content of the waste entering the incineration plant and the reasonable range of the calorific value of the waste entering the incineration plant - the oxygen consumption data; S4: Use the operation data of the waste incineration plant that has passed the rationality test, the characteristic parameters of the waste elements, and the thermal efficiency of the boiler of the waste incineration plant to build the objective function. The mathematical model based on the energy-quality balance relationship is used as a constraint condition, and a penalty parameter is added to the objective function. The penalty parameter is updated in each iteration until the accuracy requirement is met. The composition of each component of the in-furnace waste is output. The objective function is ， It represents the functional relationship represented by the constructed 7 energy-mass balance equations; represents the penalty parameter, represents the Lagrange multiplier; A data column vector representing the combination of the acquired waste incineration plant operation data, waste element characteristic parameters and boiler thermal efficiency; represents the variance-covariance matrix of the acquired waste incineration plant operation data, waste element characteristic parameters and boiler thermal efficiency data; represents a column vector of data variables representing the operation data of the waste incineration plant, characteristic parameters of waste elements, and thermal efficiency of boilers; A column vector of variables representing the mass fractions of the four components of the waste to be fed into the furnace; A numerical column vector representing the fixed parameters of the waste incineration plant and the auxiliary combustion fuel data; is the modulus value of the energy-quality balance mathematical model.

2. According to the method of calculating the composition of waste entering the incineration plant based on energy-quality balance according to claim 1, it is characterized in that: The mass balance equation characterizes the consistency of the total amount of material input and output of the incinerator, and the formula is as follows: ； In the formula represents the mass fraction, and the subscript represents the corresponding garbage component. , , , : They are respectively the mass proportions of inert components, biological components, fossil components and water in the garbage entering the furnace, which are also the quantities to be determined in the model.

3. The method for calculating the composition of waste entering a waste incineration plant based on energy-mass balance according to claim 1 is characterized in that: The ash balance equation characterizes the transformation of inert components during incineration, and the formula is as follows: ； In the formula, is the mass proportion of inert components in the waste entering the furnace; Indicates the specified time The mass of incineration ash discharged from the internal waste incinerator, in ; Indicates the specified time The mass of garbage put into the incinerator, in .

4. The method for calculating the composition of waste entering a waste incineration plant based on energy-mass balance according to claim 1 is characterized in that: The carbon balance equation characterizes the conservation of carbon during the incineration process. When auxiliary combustion fuel is used, the formula is as follows: ； In the formula, and are the mass proportions of biological components and fossil components in the waste entering the furnace; is the mass fraction of carbon in biomass waste, in units of ; is the mass fraction of carbon in fossil waste, in units of ; For the specified time Standard dry flue gas volume at the chimney of the internal waste incineration plant, in units of ; , The specified time Average dry flue gas at standard condition at chimney position of internal waste incineration plant and Content, unit is ; , The specified time Average air volume and Content, unit is ; is the molar mass of carbon atom; is the molar volume of an ideal gas under standard conditions; is the molar mass of the auxiliary combustion gas fuel in the waste incineration plant, in units of ; is the mass fraction of carbon in the auxiliary combustion gas fuel, in units of ; For the specified time The amount of gas auxiliary fuel used in the internal waste incineration plant, in ; is the mass fraction of carbon in the auxiliary combustion liquid fuel, in units of ; For the specified time The amount of liquid auxiliary fuel used in the internal waste incineration plant, in ; Indicates the specified time The mass of garbage put into the incinerator, in .

5. The method for calculating the composition of waste entering a waste incineration plant based on energy-mass balance according to claim 1 is characterized in that: The energy balance equation represents the balance between energy input and output during the incineration process. When auxiliary combustion fuel is used, the formula is as follows: ； In the formula, , , They are the mass proportions of biological components, fossil components and water in the waste entering the furnace; is the mass fraction of carbon in biomass waste, in units of ; is the mass fraction of carbon in fossil waste, in units of ; is the mass fraction of hydrogen in the biomass waste, in units of ; is the mass fraction of hydrogen in fossil waste, in units of ; is the mass fraction of oxygen in the biomass waste, in units of ; is the mass fraction of oxygen in fossil waste, in units of ; is the mass fraction of nitrogen in the biomass waste, in units of ; is the mass fraction of nitrogen in fossil waste, in units of ; is the mass fraction of sulfur in the biomass waste, in units of ; is the mass fraction of sulfur in fossil waste, in units of ; For the specified time Internal boiler steam quality, unit: ; is the net enthalpy of steam cycle in the waste incineration plant, in ; is the boiler thermal efficiency; Indicates the specified time The mass of garbage put into the incinerator, in ; is the average lower calorific value of gas auxiliary fuel, in units of ; For the specified time The amount of gas auxiliary fuel used in the internal waste incineration plant, in ; For the specified time The amount of liquid auxiliary fuel used in the internal waste incineration plant, in ; is the average lower calorific value of liquid auxiliary fuel, in units of ; For the specified time Internal permeate boiler back injection volume, unit: .

6. The method for calculating the composition of waste entering a waste incineration plant based on energy-mass balance according to claim 1 is characterized in that: The oxygen consumption equation characterizes the oxygen consumption during the waste incineration process. When the auxiliary combustion fuel is used, the formula is as follows: ； Where: and are the mass proportions of biological components and fossil components in the waste entering the furnace; is the mass fraction of carbon in biomass waste, in units of ; is the mass fraction of carbon in fossil waste, in units of ; is the mass fraction of hydrogen in the biomass waste, in units of ; is the mass fraction of hydrogen in fossil waste, in units of ; is the mass fraction of oxygen in the biomass waste, in units of ; is the mass fraction of oxygen in fossil waste, in units of ; is the mass fraction of nitrogen in the biomass waste, in units of ; is the mass fraction of nitrogen in fossil waste, in units of ; is the mass fraction of sulfur in the biomass waste, in units of ; is the mass fraction of sulfur in fossil waste, in units of ; is the molar mass of carbon atom is the molar mass of hydrogen atom; is the atomic molar mass of oxygen; is the atomic molar mass of nitrogen; is the molar mass of sulfur atom; For the specified time Standard dry flue gas volume at the chimney of the internal waste incineration plant, in units of ; Indicates the specified time The mass of garbage put into the incinerator, in ; , The specified time Average air volume and Content, unit is ; , The specified time Average dry flue gas at standard condition at chimney position of internal waste incineration plant and Content, unit is ; is the molar volume of an ideal gas under standard conditions; is the molar mass of the auxiliary combustion gas fuel in the waste incineration plant, in units of ; For the specified time The amount of gas auxiliary fuel used in the internal waste incineration plant, in ; is the mass fraction of carbon in the auxiliary combustion gas fuel, in units of ; is the mass fraction of hydrogen in the auxiliary combustion gas fuel, in units of ; is the mass fraction of nitrogen in the auxiliary combustion gas fuel, in units of ; For the specified time The amount of liquid auxiliary fuel used in the internal waste incineration plant, in ; is the mass fraction of carbon in the auxiliary combustion liquid fuel, in units of ; is the mass fraction of hydrogen in the auxiliary combustion liquid fuel, in units of ; is the mass fraction of nitrogen in the auxiliary combustion liquid fuel, in units of ; is the mass fraction of oxygen in the auxiliary combustion liquid fuel, in units of .

7. The method for calculating the composition of waste entering a waste incineration plant based on energy-mass balance according to claim 1 is characterized in that: The oxygen consumption and carbon dioxide production difference equation characterizes the difference in the ratio of oxygen consumption to carbon dioxide production between biological components and fossil components. When auxiliary combustion fuel is used, the formula is as follows: ； Where: and are the mass proportions of biological components and fossil components in the waste entering the furnace; is the molar mass of hydrogen atom; is the atomic molar mass of oxygen; is the atomic molar mass of nitrogen; is the molar mass of sulfur atom; is the mass fraction of hydrogen in the biomass waste, in units of ; is the mass fraction of hydrogen in fossil waste, in units of ; is the mass fraction of oxygen in the biomass waste, in units of ; is the mass fraction of oxygen in fossil waste, in units of ; is the mass fraction of nitrogen in the biomass waste, in units of ; is the mass fraction of nitrogen in fossil waste, in units of ; is the mass fraction of sulfur in the biomass waste, in units of ; is the mass fraction of sulfur in fossil waste, in units of ; For the specified time Standard dry flue gas volume at the chimney of the internal waste incineration plant, in units of ; , The specified time Average dry flue gas at standard condition at chimney position of internal waste incineration plant and Content, unit is ; , The specified time Average air volume and Content, unit is ; Indicates the specified time The mass of garbage put into the incinerator, in ; is the molar volume of an ideal gas under standard conditions; is the molar mass of the auxiliary combustion gas fuel in the waste incineration plant, in units of ; For the specified time The amount of gas auxiliary fuel used in the internal waste incineration plant, in ; For the specified time The amount of liquid auxiliary fuel used in the internal waste incineration plant, in ; is the mass fraction of hydrogen in the auxiliary combustion gas fuel, in units of ; is the mass fraction of hydrogen in the auxiliary combustion liquid fuel, in units of .

8. The method for calculating the composition of waste entering a waste incineration plant based on energy-mass balance according to claim 1 is characterized in that: The water balance equation characterizes the change in moisture content before and after waste incineration. The formula considering the use of auxiliary combustion fuel is as follows: ； Where: , , : are the mass proportions of biological components, fossil components and water in the waste entering the furnace; is the mass fraction of hydrogen in the biomass waste, in units of ; is the mass fraction of hydrogen in fossil waste, in units of ; is the molecular molar mass of water; is the molar mass of hydrogen atom; Indicates the specified time The mass of garbage put into the incinerator, in ; For the specified time Flue gas flow rate at economizer outlet of internal waste incineration plant, unit: ; is the absolute humidity of flue gas at the economizer outlet of the waste incineration plant, in units of ; For the specified time Internal permeate boiler back injection volume, unit: ; For the specified time The primary air flow rate of the internal waste incineration plant is ; is the absolute humidity of the primary air in the waste incineration plant, in units of ; For the specified time Secondary air flow rate of internal waste incineration plant, unit: ; is the absolute humidity of the secondary air in the waste incineration plant, in units of ; is the molar mass of the auxiliary combustion gas fuel in the waste incineration plant, in units of ; is the mass fraction of hydrogen in the auxiliary combustion gas fuel, in units of ; For the specified time The amount of gas auxiliary fuel used in the internal waste incineration plant, in ; is the molar volume of an ideal gas under standard conditions; is the mass fraction of hydrogen in the auxiliary combustion liquid fuel, in units of ; For the specified time The amount of liquid auxiliary fuel used in the internal waste incineration plant, in .

9. The method for calculating the composition of waste entering a waste incineration plant based on energy-mass balance according to claim 1 is characterized in that: The data rationality check on the acquired operation data specifically includes: When considering the use of auxiliary combustion fuel, the calculation formula for the lower calorific value corresponding to the operating data is as follows: ； In the formula, It represents the lower calorific value of the waste entering the incinerator represented by the operating data of the waste incineration plant, in units of ; For the specified time Internal boiler steam quality, unit: ; Indicates the specified time The mass of garbage put into the incinerator, in ; is the net enthalpy of steam cycle in the waste incineration plant, in ; is the boiler thermal efficiency; is the average lower calorific value of gas auxiliary fuel, in units of ; For the specified time The amount of gas auxiliary fuel used in the internal waste incineration plant, in ; is the average lower calorific value of liquid auxiliary fuel, in units of ; For the specified time The amount of liquid auxiliary fuel used in the internal waste incineration plant, in ; When the auxiliary combustion fuel is used, the calculation formula for the carbon content of garbage corresponding to the operating data is as follows: ； In the formula, It represents the carbon content of the waste entering the incinerator represented by the operating data of the waste incineration plant, in units of ; , The specified time Average dry flue gas at standard condition at chimney position of internal waste incineration plant and Content, unit is ; , The specified time Average air volume and Content, unit is ; For the specified time Standard dry flue gas volume at the chimney of the internal waste incineration plant, in units of ; is the molar mass of carbon atom, Indicates the specified time The mass of garbage put into the incinerator, in ; is the molar volume of an ideal gas under standard conditions; is the molar mass of the auxiliary combustion gas fuel in the waste incineration plant, in units of ; For the specified time The amount of gas auxiliary fuel used in the internal waste incineration plant, in ; is the mass fraction of carbon in the auxiliary combustion gas fuel, in units of ; For the specified time The amount of liquid auxiliary fuel used in the internal waste incineration plant, in ; is the mass fraction of carbon in the auxiliary combustion liquid fuel, in units of ; When the auxiliary combustion fuel is used, the calculation formula for the oxygen consumption of garbage combustion corresponding to the operating data is as follows: ； In the formula, It represents the oxygen consumption of the garbage entering the incinerator represented by the operating data of the garbage incineration plant, in units of ; is the mass fraction of hydrogen in the auxiliary combustion gas fuel, in units of ; is the mass fraction of nitrogen in the auxiliary combustion gas fuel, in units of ; is the mass fraction of hydrogen in the auxiliary combustion liquid fuel, in units of ; is the mass fraction of nitrogen in the auxiliary combustion liquid fuel, in units of ; is the mass fraction of oxygen in the auxiliary combustion liquid fuel, in units of ; is the molar mass of hydrogen atom; is the atomic molar mass of oxygen; is the atomic molar mass of nitrogen; The data relationship between the low calorific value-carbon content and the low calorific value-oxygen consumption of the incoming garbage represented by the current operating data is obtained, and the rationality of the current operating data is judged based on whether the data relationship falls within the theoretical reasonable range obtained by Monte Carlo random simulation.

10. The method for calculating the composition of waste entering a waste incineration plant based on energy-mass balance according to claim 1 is characterized in that: The specific process of S4 includes: The waste incineration plant operation data, waste element characteristic parameters and boiler thermal efficiency are combined into a data column vector, and the weighted least squares method is applied to form an objective function, including: Calculate the variance-covariance matrix of the above data column vector, and use the inverse of the matrix as the weight matrix of the objective function. The objective function is as follows: ； Where: A data column vector representing the combination of the acquired waste incineration plant operation data, waste element characteristic parameters and boiler thermal efficiency; represents a column vector of data variables representing the operation data of the waste incineration plant, characteristic parameters of waste elements, and thermal efficiency of boilers; represents the variance-covariance matrix of the acquired waste incineration plant operation data, waste element characteristic parameters and boiler thermal efficiency data; The mathematical model based on energy-quality balance needs to be used as the constraint condition of the objective function, including: The mathematical model based on energy-quality balance is: ； Where: It represents the functional relationship represented by the constructed 7 energy-mass balance equations; A column vector of variables representing the mass fractions of the four components of the waste to be fed into the furnace (inert components, biological components, fossil components, and water); A numerical column vector representing the fixed parameters of the waste incineration plant and the auxiliary combustion fuel data; Then the objective function is updated as: ； Where: represents the Lagrange multiplier; It is necessary to add penalty parameters to the objective function as constraint modulus coefficients and also as constraint conditions of the objective function, including: The module value of the energy-quality balance mathematical model is defined as: ； Introducing penalty parameters , then the objective function is updated as: ； It is necessary to perform iterative solution, update penalty parameters, and update Lagrange multipliers until the calculation results meet the accuracy requirements, including: After each iteration, check Update the penalty parameter based on the change compared to the previous iteration: ； In the formula, the superscript and Respectively represent The iterations and Iterations; The Lagrange multipliers are then updated: ； To analyze the accuracy of the calculation results, it is necessary to The result of the next iteration needs to be compared with the result of the previous iteration until the relationship satisfies: ； Where: Requires calculation accuracy.

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