Simulation analysis system and method for dioxin concentration in furnace during solid waste incineration

Abstract

The present invention provides a system and method for simulating and analyzing dioxin concentration within a furnace during solid waste incineration. The system comprises: a region division module connected to a numerical simulation module, which is connected to a single-factor analysis module, which includes an orthogonal test analysis module. The region division module is used to divide the furnace into regions within the incinerator; the numerical simulation module is used to model and simulate each of the divided regions; the single-factor analysis module is used to perform single-factor analysis based on the output of the numerical simulation module; and the orthogonal test analysis module is used to perform orthogonal test analysis based on the output of the numerical simulation module. The system and method for simulating and analyzing dioxin concentration within a furnace during solid waste incineration provided by the present invention can effectively analyze and simulate the mechanisms of DXN generation, combustion, and regeneration within an incinerator during the MSWI process, providing a reference for reducing DXN concentration at the outlet of the waste heat boiler.

Description

Technical Field

[0001] The present invention relates to the technical field of municipal solid waste incineration, and in particular to a system and method for simulating and analyzing dioxin concentration in a furnace during solid waste incineration. Background Art

[0002] Currently, MSW disposal methods include sanitary landfill, composting, and incineration. MSW incineration (MSWI) offers significant advantages in terms of harmlessness, volume reduction, and resource utilization, and is currently being vigorously promoted in my country. However, unstable MSWI processes can produce dioxin (DXN) organic pollutants, including polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs). Their persistent environmental pollution poses significant risks to human health and life. Therefore, research on the DXN formation mechanism and inhibition technologies in MSWI processes has been a hot topic in both industry and academia.

[0003] The DXN generation process during the MSWI process is highly complex, and its underlying mechanisms remain largely unresolved, requiring further in-depth research and exploration. For these reasons, researchers both domestically and internationally currently analyze the MSWI process through numerical simulation models to understand incineration mechanisms and optimize design. Current DXN detection and modeling efforts primarily focus on G3 flue gas emitted from chimneys, neglecting G1 flue gas at the waste heat boiler (HRSG) outlet, which is directly associated with DXN generation. Therefore, it is crucial to design a system and method for simulating and analyzing in-furnace dioxin concentrations during solid waste incineration, specifically G1 flue gas at the HRSG outlet. Summary of the Invention

[0004] The purpose of the present invention is to provide a simulation analysis system and method for dioxin concentration in the furnace during solid waste incineration, which can effectively analyze and simulate the mechanisms of DXN generation, combustion and regeneration in the MSWI process incinerator, and provide a reference for reducing the DXN concentration at the outlet of the waste heat boiler.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A simulation and analysis system for dioxin concentration in a furnace during solid waste incineration, comprising: a region division module, a numerical simulation module, a single factor analysis module, and an orthogonal test analysis module, wherein the region division module is connected to the numerical simulation module, which is connected to the single factor analysis module. The single factor analysis module includes the orthogonal test analysis module. The region division module is used to divide the furnace area of the incinerator, the numerical simulation module is used to model and simulate each divided area, the single factor analysis module is used to perform single factor analysis based on the output of the numerical simulation module, and the orthogonal test analysis module is used to perform orthogonal test analysis based on the output of the numerical simulation module.

[0007] The numerical simulation module includes a solid phase combustion zone simulation model, a gas phase combustion zone simulation model, a high temperature heat exchange zone simulation model, and a low temperature heat exchange zone simulation model. The solid phase combustion zone simulation model is connected to the gas phase combustion zone simulation model, the gas phase combustion zone simulation model is connected to the high temperature heat exchange zone simulation model, and the high temperature heat exchange zone simulation model is connected to the low temperature heat exchange zone simulation model.

[0008] Optionally, the solid phase combustion zone simulation model, the gas phase combustion zone simulation model, the high temperature heat exchange zone simulation model, and the low temperature heat exchange zone simulation model are composed of an RStoic module, an RGibbs module, an RYield module, a Sep module, an Fsplit module, and a Mixer module. The RStoic module includes a Dry module and a Deacon module. The RGibbs module includes a CombustionA1-A10 module, a CombustionB1-B10 module, a CombustionC1-C10 module, a CombustionD1-D10 module, a Pyrolysis1-10 module, Homogeneous1-10 modules, PrecursorCatalytic1-10 modules and DeNovo1-10 modules, the RYield module includes a DryGrate module, a BurnGrate1 module, a BurnGrate2 module and a BurnoutGrate module, the Sep module includes a Sep1-Sep10 module, the Fsplit module includes a Split1-Split21 module, and the Mixer module includes a Mix1-Mix11 module;

[0009] The Dry module is used to reduce the moisture content of MSW, the Deacon module is used to perform the Deacon reaction, the CombustionA1-A10 modules, CombustionB1-B10 modules, CombustionC1-C10 modules, and CombustionD1-D10 modules are used to perform solid-phase combustion to produce DXN, the Pyrolysis1-10 modules are used to perform gas-phase combustion to decompose DXN, the Homogeneous1-10 modules are used to perform high-temperature gas-phase reactions, the PrecursorCatalytic1-10 modules are used to perform precursor catalytic reactions, the DeNovo1-10 modules are used to perform de novo synthesis reactions, the DryGrate module, BurnGrate1 module, BurnGrate2 module, and BurnoutGrate module are used to convert MSW into identifiable conventional components and simulate volatile analysis, the Sep1-Sep10 modules are used for component separation, the Split1-Split21 modules are used to separate streams, and the Mix1-Mix11 modules are used to mix streams.

[0010] Optionally, the solid phase combustion zone simulation model includes a Dry module, MSW is input into the Dry module, the Dry module is connected to the Split1, Split2 and Split3 modules respectively, the Split1 module is connected to the DryGrate module, BurnGrate1 module, BurnGrate2 module and BurnoutGrate module respectively, the DryGrate module, BurnGrate1 module, BurnGrate2 module and BurnoutGrate module are connected to Sep4, Sep5, Sep6 and Sep7 modules respectively, the Split3 module is connected to the Dry module and the DryGrate module, the Split2 module is connected to the Sep4, Sep5, Sep6 and Sep7 modules respectively, the DryGrate module is connected to the BurnGrate1 module through Sep1, the BurnGrate1 module is connected to the BurnGrate2 module through Sep2, the BurnGrate2 module is connected to the BurnoutGrate module through Sep3 module, the Sep4, Sep5, Sep6 and Sep7 modules are connected to the CombustionA1-A10 modules, CombustionB1-B10 modules, CombustionC1-C10 modules, CombustionD1-D10 modules through the Split4, Split5, Split6, Split7 modules respectively, the CombustionA1-A10 modules, CombustionB1-B10 modules, CombustionC1-C10 modules Modules and CombustionD1-D10 modules are connected to the Mix5 module through Mix1, Mix2, Mix3 and Mix4 modules respectively.

[0011] Optionally, the gas phase combustion zone simulation model includes a Sep8 module, the Mix5 module is connected to the Sep8 module, the Sep8 module is respectively connected to the Split8, Split9, Split11, Split13 modules and the Pyrolysis6 module, the Split8 module is respectively connected to the Split9, Split11, Split13 modules and the Pyrolysis6 module, the Split9 module is respectively connected to the Split10 module and the Pyrolysis6 module, wherein the stream of the Split9 module connected to the Split10 module is the DXN concentration contained after the reaction in the gas phase combustion zone, denoted as SPY, the Split10 module is connected to the Pyrolysis1-5 modules, the Split11 module is connected to the Split12 module and the Pyrolysis6 module, and the Split12 module is connected to the Pyrolysis7-8 Module, the Split13 module is connected to the Pyrolysis6 module and the Split14 module, the Split14 module is connected to the Pyrolysis9-10 module, and the Pyrolysis1-5 module, the Pyrolysis6 module, the Pyrolysis7-8 module, and the Pyrolysis9-10 module are connected to the Mix6 module.

[0012] Optionally, the high-temperature heat exchange zone includes a Sep9 module, the Mix6 module is connected to the Sep9 module, the Sep9 module is respectively connected to the Deacon module, the Split15 module and the Split16 module, the Split15 module is respectively connected to the Deacon module and the Split16 module, wherein the stream connected by the Split15 module to the Split16 module is the DXN concentration after the reaction in the high-temperature heat exchange zone, recorded as SHG, the Split16 module is connected to the Homogeneous1-10 module, the Homogeneous1-10 module is connected to the Mix7 module, and the Deacon module and the Mix7 module are connected to the Mix8 module;

[0013] Optionally, the low-temperature heat exchange zone includes a Sep10 module, the Mix8 module is connected to the Sep10 module, the Sep10 module is respectively connected to the Split17 module, the Split19 module, the Split20 module and the Heater module, the Split17 module is respectively connected to the Split18 module and the Heater module, the Split20 module is respectively connected to the Split21 module and the Heater module, the stream of the Split17 module connected to the Split18 module and the stream of the Split20 module connected to the Split21 module are the DXN concentrations after the reaction in the low-temperature heat exchange zone, which are respectively recorded as SPC and SDN, the Split19 module is respectively connected to the Split18 module and the Split21 module, the Split18 module is connected to the PrecursorCatalytic1-10 module, the PrecursorCatalytic1-10 module is connected to the Mix9 module, and the Split21 module is connected to the DeNovo1-10 Module, the DeNovo1-10 module is connected to the Mix10 module, and the Mix9 module, Mix10 module and Heater module are connected to the Mix11 module to output the DXN concentration at the boiler outlet.

[0014] The present invention also provides a method for simulating and analyzing dioxin concentration in a furnace during solid waste incineration, which is applied to the above-mentioned system for simulating and analyzing dioxin concentration in a furnace during solid waste incineration, and includes the following steps:

[0015] Step 1: Based on the MSWI process and the generation, decomposition and regeneration mechanism of DXN in the furnace, the incinerator is divided into solid phase combustion zone, gas phase combustion zone, high temperature heat exchange zone and low temperature heat exchange zone through the zone division module;

[0016] Step 2: Based on the actual incinerator equipment parameters, operating parameters, boundary conditions, and the divided areas, a numerical simulation model that conforms to the actual DXN emission value range is simulated using the data simulation module. The single factor analysis module is used to perform single factor analysis on the four streams of SPY, SHG, SPC, and SDN.

[0017] Step 3: Perform multi-factor orthogonal test analysis through the orthogonal test analysis module based on the single-factor analysis results and the data simulation module.

[0018] According to the specific embodiment provided by the present invention, the present invention discloses the following technical effects: the present invention provides a system and method for simulating and analyzing dioxin concentration in a furnace during solid waste incineration, the system including a region division module, a numerical simulation module, a single factor analysis module and an orthogonal test analysis module, the method including, based on the MSWI process and the generation, decomposition and regeneration mechanism of DXN in the furnace, dividing the furnace area of the incinerator into a solid phase combustion zone, a gas phase combustion zone, a high temperature heat exchange zone and a low temperature heat exchange zone through the region division module, and performing data simulation according to the actual incinerator equipment parameters, operating parameters and boundary conditions and the divided areas. The real module is simulated by a numerical simulation model that conforms to the actual DXN emission value range. The single factor analysis module is used to perform single factor analysis on the four streams of SPY, SHG, SPC and SDN. Based on the single factor analysis results and the data simulation module, a multi-factor orthogonal test analysis is performed through the orthogonal test analysis module. Through simulation between models and comparison with the actual data, the results are basically consistent, indicating the effectiveness of the numerical simulation model. It can realize the effective analysis and simulation of the DXN generation, combustion and regeneration mechanisms in the MSWI process incinerator, and provide a reference for reducing the DXN concentration at the outlet of the waste heat boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the structure of a system for simulating and analyzing dioxin concentration in a furnace during solid waste incineration according to an embodiment of the present invention;

[0021] Figure 2 This is a flow chart of a method for simulating and analyzing dioxin concentration in a furnace during solid waste incineration according to an embodiment of the present invention;

[0022] Figure 3 It is the structure diagram of the simulation strategy model;

[0023] Figure 4 This is the structural diagram of the simulation model of the solid phase combustion zone;

[0024] Figure 5 This is the structural diagram of the simulation model of the gas phase combustion zone;

[0025] Figure 6 This is the structural diagram of the simulation model of the high-temperature heat exchange area;

[0026] Figure 7 This is the structural diagram of the simulation model of the low-temperature heat exchange area;

[0027] Figure 8 The MSWI process flow chart based on grate furnace

[0028] Figure 9 This is the simulation result diagram of DXN concentration at G1;

[0029] Figure 10 This is a graph showing the effect of SPY split fraction on DXN concentration;

[0030] Figure 11 This is the effect of SHG split fraction on DXN concentration;

[0031] Figure 12 This is the effect of SPC split fraction on DXN concentration;

[0032] Figure 13 This is the effect of SDN diversion fraction on DXN concentration;

[0033] Figure 14 This is the effect of SPY split fraction on the concentrations of PCDFs and PCDDs and the ratio of PCDFs / PCDDs;

[0034] Figure 15 This is the effect of SHG split fraction on the concentrations of PCDFs and PCDDs and the ratio of PCDFs / PCDDs;

[0035] Figure 16 This is the effect of SPC split ratio on PCDFs and PCDDs concentrations and the ratio of PCDFs / PCDDs;

[0036] Figure 17 This is the effect of SDN split ratio on PCDFs and PCDDs concentrations and the ratio of PCDFs / PCDDs;

[0037] Figure 18 This is the effect of high temperature decomposition reaction temperature TPY on DXN concentration;

[0038] Figure 19 This is the effect of high temperature gas phase reaction temperature THG on DXN concentration;

[0039] Figure 20 This is the effect of precursor catalytic reaction temperature TPC on DXN concentration;

[0040] Figure 21 This is a diagram showing the effect of de novo synthesis reaction temperature TDN on DXN concentration. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] The purpose of the present invention is to provide a simulation analysis system and method for dioxin concentration in the furnace during solid waste incineration, which can effectively analyze and simulate the mechanisms of DXN generation, combustion and regeneration in the MSWI process incinerator, and provide a reference for reducing the DXN concentration at the outlet of the waste heat boiler.

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] like Figure 1 As shown, the simulation analysis system for dioxin concentration in the furnace during solid waste incineration provided by the embodiment of the present invention includes: a region division module, a numerical simulation module, a single factor analysis module and an orthogonal test analysis module, the region division module is connected to the numerical simulation module, the numerical simulation module is connected to the single factor analysis module, the single factor analysis module includes the orthogonal test analysis module, the region division module is used to divide the furnace area of the incinerator, the numerical simulation module is used to model and simulate each divided area, the single factor analysis module is used to perform single factor analysis according to the output of the numerical simulation module, and the orthogonal test analysis module is used to perform orthogonal test analysis according to the output of the numerical simulation module;

[0045] The numerical simulation module includes a solid phase combustion zone simulation model, a gas phase combustion zone simulation model, a high temperature heat exchange zone simulation model, and a low temperature heat exchange zone simulation model. The solid phase combustion zone simulation model is connected to the gas phase combustion zone simulation model, the gas phase combustion zone simulation model is connected to the high temperature heat exchange zone simulation model, and the high temperature heat exchange zone simulation model is connected to the low temperature heat exchange zone simulation model.

[0046] like Figure 8As shown in the figure, from the perspective of DXN concentration, there will be trace amounts of DXN (about 0.8ng TEQ / Kg) in the original MSW and it contains a variety of chlorine-containing compounds required for its production. The feeder pushes the MSW into the incinerator, and it undergoes drying, combustion 1, combustion 2 and the ember grate in sequence to burn the combustible components. In order to ensure that the DXN contained in the original MSW and generated during solid phase combustion can be completely decomposed in the furnace, the gas phase combustion process must meet the process requirements of strictly controlling the flue gas temperature above 850℃, the high temperature flue gas residence time in the furnace for more than 2 seconds, and ensuring a sufficiently large flue gas turbulence. The high temperature flue gas generated in the furnace is sucked into the waste heat recovery system by the induced draft fan, and generates high temperature steam after heat exchange with the liquid water in the boiler drum. The flue gas temperature at the outlet of the waste heat boiler after cooling treatment is lower than 200℃ (i.e. flue gas G1), among which: From the perspective of the generation mechanism, the chemical processes that can generate DXN when the high-temperature flue gas is cooled by the waste heat boiler include high-temperature gas-phase synthesis (800℃~500℃), precursor synthesis (450℃~200℃) and de novo synthesis (350℃~250℃) and other reactions. According to the above description, the incinerator can be divided into solid-phase combustion zone, gas-phase combustion zone, high-temperature heat exchange zone and low-temperature heat exchange zone.

[0047] Among them, solid phase combustion zone: When MSW burns from the solid phase, in addition to the DXN it contains being released, incomplete combustion products will be generated under the condition of local oxygen deficiency. The latter are the key precursors for the formation of DXN, mainly including chlorobenzene, polychlorobenzenes, chlorophenols, polycyclic aromatic hydrocarbons, etc. Further, these precursors generate DXN through chemical reactions and enter the gas phase combustion zone in the furnace;

[0048] Gas phase combustion zone: The temperature of the gas phase combustion zone is 800-1000℃. The DXN and precursors volatilized and generated in the solid phase combustion zone of the grate will be decomposed due to high temperature combustion in this range, and the final products are CO2 and HCl.

[0049] High-temperature heat exchange zone: The temperature is between 800 and 500°C, which corresponds to the heat exchange zone of the superheater for waste heat recovery. Since the reaction is mainly to synthesize DXN in the high-temperature gas phase, the content of solid and liquid DXN is very small. Chlorophenol oxidative coupling is the main pathway for the production of DXN. From a mechanistic perspective, it can be divided into three steps: formation of chlorophenoxy free radicals, coupling, and cyclization.

[0050] Low-temperature heat exchange zone: Operating at temperatures between 500°C and 200°C, this zone primarily conducts low-temperature heterogeneous catalytic reactions, including precursor surface catalytic reactions and de novo synthesis reactions. Precursors such as chlorophenols and chlorobenzene, carried by flue gas and decomposed from residual carbon, react with metals such as CuO as catalysts during cooling to form PCDD / Fs according to the ER and LH mechanisms. This process can be divided into four steps: precursor adsorption onto the catalyst in fly ash, adsorption of a second precursor molecule, condensation of the adsorbed molecules to form PCDD / Fs, and desorption of the PCDD / Fs. De novo synthesis is carbon-based, generating DXN through a series of elementary reactions, including chlorination and oxidation. The necessary conditions are: the presence of organic or inorganic chlorine, oxygen, and transition metal chlorides as catalysts, and residual carbon adsorbed in the pores of fly ash particles. Some of the PCDD / Fs generated by the above reaction will diffuse into the flue gas, but most of them will remain in the fly ash. The influencing factors include: temperature, reaction time, residual carbon content in the fly ash, chlorine form and content, catalyst, pH value and reaction atmosphere (O2, H2O, Cl2, HCl), etc.

[0051] The system and method of the present invention need to be implemented in a steady-state environment, that is:

[0052] (1) The incinerator is in a stable operating state, the reaction in the furnace can reach equilibrium, the temperature and pressure in each reactor are constant, and pressure loss and heat loss are not considered;

[0053] (2) During the incineration process, MSW and air are fully mixed and evenly distributed, and the effect of MSW particle size on combustion is ignored;

[0054] (3) The main elements of MSW are C, H, O, N, S, and Cl, among which: H, O, N, S, and Cl are all converted into gas phase; C is partially converted into gas phase, and partly converted into residual carbon and ash; ash is an inert substance and does not participate in any reaction;

[0055] (4) Since the composition of tar is extremely complex, it is assumed that the product does not contain tar.

[0056] like Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown, the solid phase combustion zone simulation model, the gas phase combustion zone simulation model, the high temperature heat exchange zone simulation model and the low temperature heat exchange zone simulation model are composed of RStoic module, RGibbs module, RYield module, Sep module, Fsplit module and Mixer module. The RStoic module includes Dry module and Deacon module. The RGibbs module includes CombustionA1-A10 module, CombustionB1-B10 module, CombustionC1-C10 module, CombustionD1-D10 module, Pyrolysis1-10 module, Homogeneous1-10 module, PrecursorCatalytic1-10 module and DeNovo1-10 module. The RYield module includes DryGrate module, BurnGrate1 module, BurnGrate2 module and BurnoutGrate module, the Sep module includes Sep1-Sep10 modules, the Fsplit module includes Split1-Split21 modules, and the Mixer module includes Mix1-Mix11 modules;

[0057] The Dry module is used to reduce the moisture content of MSW, the Deacon module is used to perform the Deacon reaction, the CombustionA1-A10 modules, CombustionB1-B10 modules, CombustionC1-C10 modules, and CombustionD1-D10 modules are used to perform solid-phase combustion to produce DXN, the Pyrolysis1-10 modules are used to perform gas-phase combustion to decompose DXN, the Homogeneous1-10 modules are used to perform high-temperature gas-phase reactions, the PrecursorCatalytic1-10 modules are used to perform precursor catalytic reactions, the DeNovo1-10 modules are used to perform de novo synthesis reactions, the DryGrate module, BurnGrate1 module, BurnGrate2 module, and BurnoutGrate module are used to convert MSW into identifiable conventional components and simulate volatile analysis, the Sep1-Sep10 modules are used for component separation, the Split1-Split21 modules are used to separate streams, and the Mix1-Mix11 modules are used to mix streams.

[0058] like Figure 3As shown, the solid phase combustion zone simulation model includes a Dry module, MSW is input into the Dry module, the Dry module is connected to the Split1, Split2 and Split3 modules respectively, the Split1 module is connected to the DryGrate module, BurnGrate1 module, BurnGrate2 module and BurnoutGrate module respectively, the DryGrate module, BurnGrate1 module, BurnGrate2 module and BurnoutGrate module are connected to Sep4, Sep5, Sep6 and Sep7 modules respectively, the Split3 module is connected to the Dry module and the DryGrate module respectively, the Split2 module is connected to Sep4, Sep5, Sep6 and Sep7 modules respectively and Sep7 modules, the DryGrate module is connected to the BurnGrate1 module via Sep1, the BurnGrate1 module is connected to the BurnGrate2 module via Sep2, the BurnGrate2 module is connected to the BurnoutGrate module via Sep3 module, the Sep4, Sep5, Sep6 and Sep7 modules are connected to the CombustionA1-A10 modules, CombustionB1-B10 modules, CombustionC1-C10 modules, CombustionD1-D10 modules via Split4, Split5, Split6, Split7 modules respectively, the CombustionA1-A10 modules, CombustionB1-B10 modules, CombustionC1-C10 modules, CombustionD1-D10 modules are connected to the Mix5 module via Mix1, Mix2, Mix3 and Mix4 modules respectively, wherein the Split3 module, BurnGrate1 module, BurnGrate2 module and BurnoutGrate The modules input primary air respectively, and Sep1, Sep2, and Sep3 modules output ASH1, ASH2, and ASH3 respectively;

[0059] The MSW containing moisture first enters the Dry module for drying, and then flows into the DryGrate module, BurnGrate1 module, BurnGrate2 module and BurnoutGrate module through the Split1 module to simulate volatilization and analysis. The moisture enters the subsequent reaction, as shown in the formula:

[0060] MSW→H2O+H2+C+CO+CO2+CH4+C6H6+H2S+N2+HCl +C6Cl5OH+C6H2ClOH+C6Cl6+C6HCl5+ASH

[0061] In the formula, C6Cl5OH is pentachlorophenol, C6H2Cl5OH is 2,4,6-trichlorophenol, C6H6 is benzene, C6Cl6 is hexachlorobenzene, C6HCl5 is pentachlorobenzene, and ASH is ash;

[0062] Furthermore, the volatiles are separated by the Sep4-Sep7 modules, with very small amounts of HCl, CBz (chlorobenzenes), and CP (chlorophenols) added to the S30-S33 streams. Ten RGIbbs reactors are installed in each of the four modules, CombustionA1-A10, B1-B10, C1-C10, and D1-D10, to simulate the solid-phase combustion process of DXN. Seventeen DXN congeners are divided into 10 categories based on the number of Cl atom substitutions, PCDDs, and PCDFs, and are produced separately by the RGIbbs reactors.

[0063] like Figure 4 As shown, the gas phase combustion zone simulation model includes a Sep8 module, the Mix5 module is connected to the Sep8 module, the Sep8 module is respectively connected to the Split8, Split9, Split11, Split13 modules and the Pyrolysis6 module, the Split8 module is respectively connected to the Split9, Split11, Split13 modules and the Pyrolysis6 module, the Split9 module is respectively connected to the Split10 module and the Pyrolysis6 module, wherein the stream of the Split9 module connected to the Split10 module is the DXN concentration contained after the reaction in the gas phase combustion zone, denoted as SPY, the Split10 module is connected to the Pyrolysis1-5 modules, the Split11 module is connected to the Split12 module and the Pyrolysis6 module, and the Split12 module is connected to the Pyrolysis7-8 Module, the Split13 module is connected to the Pyrolysis6 module and the Split14 module, the Split14 module is connected to the Pyrolysis9-10 module, the Pyrolysis1-5 module, the Pyrolysis6 module, the Pyrolysis7-8 module, and the Pyrolysis9-10 module are connected to the Mix6 module, and the Split8 module flows into the secondary air;

[0064] The stream S118 originating from the solid-phase combustion zone is separated into DXN, HCl, CBz and CP through Sep8 (the corresponding streams are recorded as S119, S121, S122 and S123 respectively). Accordingly, DXN undergoes high-temperature decomposition and synthesis reactions in the Pyrolysis1-Pyrolysis5 modules. Similar to the previous article, the five RGIbbs modules are set according to the number of Cl atoms replaced. The Pyrolysis6 module performs decomposition reactions of DXN, CBz and CP, the Pyrolysis7-8 modules perform decomposition and synthesis reactions of CBz, and the Pyrolysis9 and 10 modules perform decomposition and synthesis reactions of CP. SPY can characterize the DXN concentration contained after the reaction in the gas-phase combustion zone.

[0065] like Figure 5 As shown, the high-temperature heat exchange zone includes a Sep9 module, the Mix6 module is connected to the Sep9 module, the Sep9 module is respectively connected to the Deacon module, the Split15 module and the Split16 module, the Split15 module is respectively connected to the Deacon module and the Split16 module, wherein the stream connected between the Split15 module and the Split16 module is the DXN concentration after the reaction in the high-temperature heat exchange zone, denoted as SHG, the Split16 module is connected to the Homogeneous1-10 module, the Homogeneous1-10 module is connected to the Mix7 module, and the Deacon module and the Mix7 module are connected to the Mix8 module;

[0066] Stream S147 originating from the gas-phase combustion zone is split into streams S148, S149, and S150 by Sep9. Furthermore, S149 is split into streams S150 and SHG by Split15 to separate DXN from HCl, CBz, and CP. Stream SHG contains very little CBz and CP and is used for high-temperature gas-phase synthesis reactions to generate DXN. Similarly, the high-temperature gas-phase reaction uses 10 RBibbs modules that generate DXN with different numbers of Cl atom substitutions. SHG can characterize the DXN concentration after the reaction in the high-temperature heat exchange zone.

[0067] like Figure 6As shown, the low-temperature heat exchange zone includes a Sep10 module, the Mix8 module is connected to the Sep10 module, the Sep10 module is respectively connected to the Split17 module, the Split19 module, the Split20 module and the Heater module, the Split17 module is respectively connected to the Split18 module and the Heater module, the Split20 module is respectively connected to the Split21 module and the Heater module, the stream of the Split17 module connected to the Split18 module and the stream of the Split20 module connected to the Split21 module are the DXN concentrations after the reaction in the low-temperature heat exchange zone, which are respectively recorded as SPC and SDN, the Split19 module is respectively connected to the Split18 module and the Split21 module, the Split18 module is connected to the PrecursorCatalytic1-10 module, the PrecursorCatalytic1-10 module is connected to the Mix9 module, and the Split21 module is connected to the DeNovo1-10 Module, the DeNovo1-10 module is connected to the Mix10 module, the Mix9 module, the Mix10 module and the Heater module are connected to the Mix11 module, outputting the DXN concentration at the boiler outlet, the DeNovo1-10 module flows into CuCl2, and the PrecursorCatalytic1-10 module flows into CuO;

[0068] Stream S174 originating from the high-temperature heat exchange zone undergoes component separation of DXN from HCl, Cl2, CBz and CP through Sep10, and is divided into streams S175, S176, S177 and S178; further, S178 is divided into streams S179 and SPC by Split17. The latter contains very little CBz and CP, and enters PrecursorCatalytic1-10 to simulate the precursor catalytic reaction. At the same time, S175 is divided into streams S180 and SDN by Split20. The latter contains very little Cl2, and enters DeNovo1-10 to simulate the generation of DXN by de novo synthesis reaction. Similarly, PrecursorCatalytic and DeNovo reactions also use 10 RBibbs reactors each. Finally, the DXN concentration is obtained at the boiler outlet G1. SPC and SDN can characterize the DXN concentration after the reaction in the low-temperature heat exchange zone.

[0069] like Figure 2 As shown, the present invention also provides a method for simulating and analyzing dioxin concentration in a furnace during solid waste incineration, which is characterized by comprising the following steps:

[0070] Step 1: Based on the MSWI process and the generation, decomposition and regeneration mechanism of DXN in the furnace, the incinerator is divided into solid phase combustion zone, gas phase combustion zone, high temperature heat exchange zone and low temperature heat exchange zone through the zone division module;

[0071] Step 2: Based on the actual incinerator equipment parameters, operating parameters, boundary conditions, and the divided areas, a numerical simulation model that conforms to the actual DXN emission value range is simulated using the data simulation module. The single factor analysis module is used to perform single factor analysis on the four streams of SPY, SHG, SPC, and SDN.

[0072] Step 3: Perform multi-factor orthogonal test analysis through the orthogonal test analysis module based on the single-factor analysis results and the data simulation module.

[0073] The single factor analysis module is used to conduct single factor analysis on the four streams of SPY, SHG, SPC and SDN, specifically:

[0074] To investigate the effect of reactant concentration, as represented by the split fraction, on the DXN concentration at the boiler outlet G1, a single-factor analysis was performed on four streams: SPY, SHG, SPC, and SDN. The reaction temperatures corresponding to SPY, SHG, SPC, and SDN are denoted as TPY, THG, TPC, and TDN, respectively. To investigate the effect of reaction temperature on the DXN concentration at G1, a single-factor analysis was performed on the reaction temperatures TPY, THG, TPG, and TDN. With y representing the DXN concentration at the G1 flue gas, its relationship with the eight main factors mentioned above and other factors can be expressed as follows:

[0075] y=f m o del (x SPY ,x SHG ,x SPC ,x SDN ,x TPY ,x THG ,x TPG ,xTDN,xo ther ,···)

[0076] Among them, x SPY 、x SHG 、x SPC 、x SDN 、x TPY 、x THG 、x TPC 、x TDN Respectively represent the values of SPY, SHG, SPC, SDN, TPY, THG, TPG and TDN, x other Indicates the values of variables such as industrial analysis, element analysis, primary air volume, and secondary air volume in the simulation;

[0077] x SPY For example, a result of univariate analysis can be expressed as:

[0078]

[0079] in, Indicates the value of SPY when performing univariate analysis, its range is and Changes between and Respectively represent SHG, SPC, SDN, TPY, THG, TPG and TDN in x SPY The fixed value used in univariate analysis, Indicates fixed values of variables such as industrial analysis, element analysis, primary air volume, and secondary air volume in the simulation.

[0080] According to the single factor analysis results and the data simulation module, the multi-factor orthogonal test analysis is performed through the orthogonal test analysis module, specifically:

[0081] By analyzing single-factor variables, we can only obtain the effects of different single factors on DXN concentration, PCDFs concentration, PCDDs concentration, and the ratio of PCDFs / PCDDs. The actual MSWI process is the result of the combined action of multiple factors. In order to investigate the effects of eight factors, including SPY split fraction, SHG split fraction, SPC split fraction, SDN split fraction, high-temperature decomposition reaction temperature TPY, high-temperature gas phase reaction temperature THG, precursor catalytic reaction temperature TPC, and de novo synthesis reaction temperature TDN, on the DXN concentration at G1, a multi-level orthogonal experiment was conducted on these factors. For a certain experiment, the output can be expressed as:

[0082]

[0083] in, and They represent the design values of SHG, SPC, SDN, TPY, THG, TPG and TDN respectively when conducting orthogonal experimental analysis. Indicates the fixed values of variables such as industrial analysis, element analysis, primary air volume, and secondary air volume in the simulation. The importance of each factor is analyzed using the range calculation formula, as shown in the formula:

[0084]

[0085] Among them, i represents the i-th factor in the orthogonal experiment, j represents the j-th level of the i-th factor, Represents r experimental data y when the i-th factor is at the j-th level designThe average value of , r represents the number of times the level appears in the experiment.

[0086] Taking an incineration power plant in Beijing as an example, its industrial analysis and elemental analysis results are shown in Table 1. Combined with the site, the relevant settings of primary and secondary air are shown in Table 2. Using the empirical trial and error method, the settings of the split flow rate and reaction temperature of the DXN-related modules are shown in Table 3.

[0087] Table 1 Industrial analysis and elemental analysis of MSW at industrial sites

[0088]

[0089] Note: ar is the as-received basis, i.e. the sample in the as-received state is used as the benchmark; d is the dry basis, i.e. the sample in the hypothetical anhydrous state is used as the benchmark

[0090] Table 2 Primary and secondary air settings that are the same as those at industrial sites

[0091]

[0092]

[0093] Table 3 Split ratio and reaction temperature settings of DXN related modules

[0094]

[0095] Through the numerical simulation module, the concentrations of 17 DXN congeners at G1 were obtained, such as Figure 9 As shown in Figure 2, the toxic equivalent concentration of 17 DXN congeners is 0.1039 ng TEQ / m 3 , 2,3,7, 8-T4CDD and 2,3,4,7,8-P5CDF contributed most to the total toxicity equivalent, and the total mass concentration of 17 DXN congeners was 0.7233 ng / m 3 The mass concentration of hexachloro-PCDD / Fs was the highest, and the mass concentrations of PCDFs and PCDDs were 0.4135 ng / m3 and 0.3098 ng / m3, respectively. This result was close to the upper limit of the actual emission at G1.

[0096] Single factor analysis was conducted on four streams, SPY, SHG, SPC and SDN, to determine their influence on the DXN concentration at the boiler outlet G1. The results are as follows: Figure 10-13 As shown, the x-axis represents the diversion rate in logarithmic form with base 10, which is given by Figure 10-13It can be seen that the DXN concentration increases with the increase of the split fraction. Among them, the DXN concentration represented by SPY that is not decomposed by high temperature has a great influence on the DXN concentration at G1, while the changes in the precursor concentration represented by SHG and SPC have a relatively small effect on the DXN concentration at G1. The maximum DXN concentration in the figure is less than 1ng TEQ / m 3 The range of Cl2 concentration variation of de novo synthesis represented by SDN is smaller than that of SHG and SPC, but its effect on DXN concentration at G1 is at the same magnitude as that of SHG and SPC. This may be because de novo synthesis is the main pathway for generating DXN, that is, low concentration of Cl2 can also generate higher concentration of DXN.

[0097] The effects of the split fractions at SPY, SHG, SPC, and SDN on the concentrations of PCDDs, PCDFs, and the ratio of PCDFs to PCDDs are shown in Figure 2. Figure 14-17 As shown by Figure 14-17 It can be seen that the concentrations of PCDFs and PCDDs both increase with the increase of the split fraction. Among them, during the gas-phase combustion DXN decomposition process, the PCDFs / PCDDs ratio gradually decreases with the increase of the SPY split fraction, from 1.466 to 0.527, indicating that PCDDs are more easily decomposed; in the high-temperature gas-phase reaction, the ratio is greater than 1 and changes slightly; in the precursor catalytic reaction, the PCDFs / PCDDs ratio decreases from 1.588 to 1.387, but is still greater than 1, because the concentration of generated PCDDs increases with the increase of the precursor concentration; in the de novo synthesis reaction, the concentrations of PCDFs and PCDDs increase with the increase of the SDN split fraction, and the PCDFs / PCDDs ratio also shows a trend of first decreasing and then increasing. The ratio is greater than 1, indicating that the concentration of PCDFs is greater than that of PCDDs, that is, the de novo synthesis is mainly based on the generation of PCDFs.

[0098] To explore the effect of reaction temperature on DXN concentration at G1, single factor analysis was performed on the reaction temperatures of four modules, namely Pyrolysis, Homogeneous, PrecursorCatalytic and DeNovo. The results are as follows: Figure 18-21 shown.

[0099] Depend on Figure 18-21 It can be seen that the DXN concentrations represented by the four curves all vary within a very small range. The DXN decomposition process in gas-phase combustion conforms to the principle that the higher the temperature, the higher the decomposition rate. In the high-temperature gas-phase reaction, the DXN concentration shows an increasing trend in both temperature ranges, with the highest DXN concentration produced near 600°C. In both the precursor catalytic reaction and the de novo synthesis reaction, the DXN concentration gradually decreases with increasing temperature, indicating that both reactions tend to be low-temperature reactions.

[0100] To investigate the effects of eight factors—SPY split fraction (A), SHG split fraction (B), SPC split fraction (C), SDN split fraction (D), high-temperature decomposition reaction temperature (TPY) (E), high-temperature gas-phase reaction temperature (THG) (F), precursor catalytic reaction temperature (TPC) (G), and de novo synthesis reaction temperature (TDN) (H)—on the DXN concentration at G1, a three-level, eight-factor orthogonal experiment was conducted. The factor levels are shown in Table 4, and the results of the orthogonal experiment are shown in Table 5.

[0101] Table 4 Factor level table

[0102]

[0103] Table 5 Orthogonal test scheme and results

[0104]

[0105]

[0106] Through orthogonal experiments and analysis of the experimental results, the range analysis results shown in Table 6 were obtained.

[0107] Table 6 Range Analysis Table

[0108]

[0109] Note: “—” indicates that the indicator was not counted because it could not be judged as optimal with an extreme value.

[0110] From Table 6 we can see that:

[0111] (1) Factor B has the greatest impact on the DXN concentration at G1. Within the experimental range, the increase in the SHG split fraction leads to an increase in the concentration of precursors involved in the high-temperature gas-phase reaction, which in turn has a significant impact on the DXN concentration at the furnace outlet. This is inconsistent with Shuab's conclusion that the amount of DXN produced by the high-temperature gas-phase reaction is very small and is not the main source of DXN produced by incineration. The possible reason is that the third level of factor B is set too high. Factors C and D have the second and third highest impacts on the DXN concentration at G1, respectively, indicating that the reactant concentration in the low-temperature heat exchange zone also has a greater impact on it. Factors G and H are located after D, indicating that the reaction temperature in the low-temperature heat exchange zone will also have an impact. The possible reason for the low ranking of factors A and E is that the decomposition of DXN in the gas-phase combustion zone is relatively complete. Factor F ranks last, indicating that the high-temperature heat exchange zone is not the main reaction temperature range for the generation of DXN in the experiment. In actual situations, reasonable process operations should be carried out to allow more DXN and precursors to be burned and decomposed in the furnace. This is in line with the 3T+E principle widely used in the current MSWI process. At the same time, the waste heat recovery heat exchange temperature should be controlled to quickly cool the flue gas and shorten the reaction time for the DXN production reaction. In this orthogonal experiment, the optimal combination is B1C1D1G3H3A1E2F2, and the corresponding value is (5×10 -3 , 5×10 -3 , 5×10 -8 , 500, 500, 5×10 -6 , 850, 650) and the DXN toxic equivalent concentration was 0.0286ng TEQ / m 3 .

[0112] (2) Factor A has the greatest impact on PCDFs concentration, while factor B has the greatest impact on PCDDs concentration, indicating that the concentration of DXN and precursors that have not been decomposed at high temperatures will have a significant impact on the concentrations of PCDFs and PCDDs. Factors C, D, G, and H are ranked in the middle, indicating that the concentration of reactants and the reaction temperature in the low-temperature heat exchange zone have a certain impact on the concentrations of PCDFs and PCDDs. In this orthogonal experiment, the optimal combinations for PCDFs and PCDDs are B1C1G3D1H3A1E1F3 and A1B1C1D1H3G3E3F1, respectively, and the corresponding values are (5×10 -3 , 5 × 10 -3 , 500, 5×10 -8 , 500, 5×10 -6 ,800,800,) and (5×10 -6 , 5×10 -3 , 5 × 10 -3 , 5×10 -8 , 500, 500, 900, 500), the corresponding PCDFs and PCDDs concentrations were 0.1087 ng / m3 and 0.0793ng / m 3 .

[0113] (3) Factor A has the most important influence on the PCDFs / PCDDs ratio, followed by factors H, G, and F. It can be seen that the concentration of undecomposed DXN in the gas phase combustion zone is the main factor affecting the PCDFs / PCDDs ratio; if the gas phase combustion results in relatively complete decomposition of DXN, then temperature is the main factor affecting the PCDFs / PCDDs ratio.

[0114] According to the above process, we can conclude that:

[0115] (1) Based on the actual process flow of a certain MSWI power plant in Beijing, the generation, decomposition and regeneration mechanism of DXN in the incinerator was analyzed, and it was divided into four areas: solid phase combustion area, gas phase combustion area, high temperature heat exchange area and low temperature heat exchange area.

[0116] (2) A numerical simulation model for DXN in the incinerator was established, which can reasonably predict the results of the MSWI process. The simulation results are basically consistent with the actual data, indicating the effectiveness of the numerical simulation model.

[0117] (3) The effects of single factor changes on the DXN concentration, PCDFs concentration, PCDDs concentration and PCDFs / PCDDs ratio at the boiler outlet G1 were studied. Among them, the DXN concentration increased with the increase of the diversion fraction and decreased with the increase of temperature (the reaction temperature in the high-temperature gas phase was the opposite).

[0118] (4) Based on orthogonal experiments and range analysis, the effects of eight factors on DXN concentration, PCDFs concentration, PCDDs concentration, and PCDFs / PCDDs ratio were investigated. The results showed that reactant concentration had a greater impact on DXN concentration than reaction temperature, and temperature changes were more likely to cause changes in the PCDFs / PCDDs ratio. The optimal parameter combination was obtained by integrating the eight factors. This study provides a theoretical reference for reducing DXN emission concentration at G1.

[0119] The present invention provides a system and method for simulating and analyzing dioxin concentration in a furnace during a solid waste incineration process. The system includes a region division module, a numerical simulation module, a single factor analysis module, and an orthogonal test analysis module. The method includes dividing the furnace area of the incinerator into a solid phase combustion zone, a gas phase combustion zone, a high temperature heat exchange zone, and a low temperature heat exchange zone based on the MSWI process and the generation, decomposition, and regeneration mechanism of DXN in the furnace through the region division module. According to the actual incinerator equipment parameters, operating parameters, and boundary conditions, as well as the divided areas, a numerical simulation model that conforms to the actual DXN emission value range is simulated through the data simulation module. The four streams of SPY, SHG, SPC, and SDN are subjected to single factor analysis through the single factor analysis module. Based on the single factor analysis results and the data simulation module, a multi-factor orthogonal test analysis is performed through the orthogonal test analysis module. Through simulation between models and comparison with actual data, the results are basically consistent, indicating the effectiveness of the numerical simulation model, and can effectively analyze and simulate the mechanisms of DXN generation, combustion, and regeneration in the MSWI process incinerator, providing a reference for reducing the DXN concentration at the outlet of the waste heat boiler.

[0120] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A simulation analysis system for dioxin concentration in a furnace during solid waste incineration, characterized in that: include: A region division module, a numerical simulation module, a single factor analysis module and an orthogonal test analysis module, wherein the region division module is connected to the numerical simulation module, the numerical simulation module is connected to the single factor analysis module, the single factor analysis module includes the orthogonal test analysis module, the region division module is used to divide the furnace area of the incinerator, the numerical simulation module is used to model and simulate each divided area, the single factor analysis module is used to perform single factor analysis according to the output of the numerical simulation module, and the orthogonal test analysis module is used to perform orthogonal test analysis according to the output of the numerical simulation module; The numerical simulation module includes a solid phase combustion zone simulation model, a gas phase combustion zone simulation model, a high temperature heat exchange zone simulation model, and a low temperature heat exchange zone simulation model. The solid phase combustion zone simulation model is connected to the gas phase combustion zone simulation model, the gas phase combustion zone simulation model is connected to the high temperature heat exchange zone simulation model, and the high temperature heat exchange zone simulation model is connected to the low temperature heat exchange zone simulation model. The solid phase combustion zone simulation model, the gas phase combustion zone simulation model, the high temperature heat exchange zone simulation model and the low temperature heat exchange zone simulation model are composed of an RStoic module, an RBibbs module, an RYield module, a Sep module, an Fsplit module and a Mixer module, wherein the RStoic module includes a Dry module and a Deacon module, the RBibbs module includes a CombustionA1-A10 module, a CombustionB1-B10 module, a CombustionC1-C10 module, a CombustionD1-D10 module, a Pyrolysis1-10 module, a Homogeneous1-10 module, a PrecursorCatalytic1-10 module and a DeNovo1-10 module, the RYield module includes a DryGrate module, a BurnGrate1 module, a BurnGrate2 module and a BurnoutGrate module, the Sep module includes a Sep1-Sep10 module, the Fsplit module includes a Split1-Split21 module, and the Mixer module includes a Mix1-Mix11 module; The Dry module is used to reduce the moisture content of MSW, the Deacon module is used to perform Deacon reaction, the CombustionA1-A10 modules, CombustionB1-B10 modules, CombustionC1-C10 modules, and CombustionD1-D10 modules are used to perform solid-phase combustion to produce DXN, the Pyrolysis1-10 modules are used to perform gas-phase combustion to decompose DXN, the Homogeneous1-10 modules are used to perform high-temperature gas-phase reaction, the PrecursorCatalytic1-10 modules are used to perform precursor catalytic reaction, the DeNovo1-10 modules are used to perform de novo synthesis reaction, the DryGrate module, BurnGrate1 module, BurnGrate2 module, and BurnoutGrate module are used to convert MSW into identifiable conventional components and simulate volatile analysis, the Sep1-Sep10 modules are used for component separation, the Split1-Split21 modules are used to separate streams, and the Mix1-Mix11 modules are used to mix streams; The solid phase combustion zone simulation model includes a Dry module, MSW is input into the Dry module, the Dry module is connected to the Split1, Split2 and Split3 modules respectively, the Split1 module is connected to the DryGrate module, BurnGrate1 module, BurnGrate2 module and BurnoutGrate module respectively, the DryGrate module, BurnGrate1 module, BurnGrate2 module and BurnoutGrate module are connected to Sep4, Sep5, Sep6 and Sep7 modules respectively, the Split3 module is connected to the Dry module and the DryGrate module respectively, the Split2 module is connected to Sep4, Sep5, Sep6 and Sep7 modules respectively, the DryGrate module is connected to the BurnGrate1 module through Sep1, the B The urnGrate1 module is connected to the BurnGrate2 module through Sep2, the BurnGrate2 module is connected to the BurnoutGrate module through the Sep3 module, the Sep4, Sep5, Sep6 and Sep7 modules are connected to the CombustionA1-A10 modules, CombustionB1-B10 modules, CombustionC1-C10 modules and CombustionD1-D10 modules through the Split4, Split5, Split6 and Split7 modules respectively, and the CombustionA1-A10 modules, CombustionB1-B10 modules, CombustionC1-C10 modules and CombustionD1-D10 modules are connected to the Mix5 module through the Mix1, Mix2, Mix3 and Mix4 modules respectively; The gas phase combustion zone simulation model includes a Sep8 module, the Mix5 module is connected to the Sep8 module, the Sep8 module is respectively connected to the Split8, Split9, Split11, Split13 modules and the Pyrolysis6 module, the Split8 module is respectively connected to the Split9, Split11, Split13 modules and the Pyrolysis6 module, the Split9 module is respectively connected to the Split10 module and the Pyrolysis6 module, wherein the stream of the Split9 module connected to the Split10 module is the DXN concentration contained after the reaction in the gas phase combustion zone, Denoted as SPY, the Split10 module is connected to the Pyrolysis1-5 module, the Split11 module is connected to the Split12 module and the Pyrolysis6 module, the Split12 module is connected to the Pyrolysis7-8 module, the Split13 module is connected to the Pyrolysis6 module and the Split14 module, the Split14 module is connected to the Pyrolysis9-10 module, and the Pyrolysis1-5 module, the Pyrolysis6 module, the Pyrolysis7-8 module, and the Pyrolysis9-10 module are connected to the Mix6 module; The high-temperature heat exchange zone simulation model includes a Sep9 module, the Mix6 module is connected to the Sep9 module, the Sep9 module is respectively connected to the Deacon module, the Split15 module and the Split16 module, the Split15 module is respectively connected to the Deacon module and the Split16 module, wherein the stream connected by the Split15 module to the Split16 module is the DXN concentration after the reaction in the high-temperature heat exchange zone, denoted as SHG, the Split16 module is connected to the Homogeneous1-10 module, the Homogeneous1-10 module is connected to the Mix7 module, and the Deacon module and the Mix7 module are connected to the Mix8 module; The low-temperature heat exchange zone simulation model includes a Sep10 module, the Mix8 module is connected to the Sep10 module, the Sep10 module is respectively connected to the Split17 module, the Split19 module, the Split20 module and the Heater module, the Split17 module is respectively connected to the Split18 module and the Heater module, the Split20 module is respectively connected to the Split21 module and the Heater module, the flow stream of the Split17 module connected to the Split18 module and the flow stream of the Split20 module connected to the Split21 module are the low-temperature heat exchange zone reaction The DXN concentrations after the heating are recorded as SPC and SDN, respectively. The Split19 module is connected to the Split18 module and the Split21 module, the Split18 module is connected to the PrecursorCatalytic1-10 module, the PrecursorCatalytic1-10 module is connected to the Mix9 module, the Split21 module is connected to the DeNovo1-10 module, the DeNovo1-10 module is connected to the Mix10 module, and the Mix9 module, the Mix10 module and the Heater module are connected to the Mix11 module to output the DXN concentration at the boiler outlet.

2. A method for simulating and analyzing dioxin concentration in a furnace during solid waste incineration, applied to the system for simulating and analyzing dioxin concentration in a furnace during solid waste incineration as claimed in claim 1, characterized in that: The steps include: Step 1: Based on the MSWI process and the generation, decomposition and regeneration mechanism of DXN in the furnace, the incinerator is divided into solid phase combustion zone, gas phase combustion zone, high temperature heat exchange zone and low temperature heat exchange zone through the zone division module; Step 2: Based on the actual incinerator equipment parameters, operating parameters, boundary conditions, and the divided areas, a numerical simulation model that conforms to the actual DXN emission value range is simulated using the data simulation module. The single factor analysis module is used to perform single factor analysis on the four streams of SPY, SHG, SPC, and SDN. Step 3: Perform multi-factor orthogonal test analysis through the orthogonal test analysis module based on the single-factor analysis results and the data simulation module.

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