A method and platform for digital design of SCR reactor for system design

Abstract

The application discloses a kind of SCR reactor digitization design method and platform for system design, belong to atmospheric pollution prevention technical field.The application is designed to the catalyst parameters of SCR reactor based on a series of field research parameters, and the body of SCR reactor is designed, and the structure model of SCR reactor is obtained, while the airflow organization simulation cloud chart in the internal of SCR reactor can be obtained, the comprehensive and reasonable design of SCR reactor is realized, the denitration effect and life of SCR reactor are improved, and the airflow organization in the internal of denitration system is researched;The digitization design platform proposed simultaneously meets the strategic development requirements of the state about industrial green development, energy saving and emission reduction, technological innovation, is the embodiment of modern environmental engineering technical progress, and is also a strong support for future environmental protection work.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of atmospheric pollution prevention and control, and particularly relates to a system design-oriented SCR (selective catalytic reduction) reactor digital design method and platform. BACKGROUND

[0002] SCR denitration technology has the advantages of high denitration efficiency, economic applicability, etc. From the development trend, it will become an effective means to control the NOX emission concentration to meet the national environmental protection standard. The key factor affecting the denitration performance of the SCR reactor is its structure, which affects the uniformity of the airflow distribution of the SCR reactor. Due to uneven airflow, the service life of the catalyst and internal components of the reaction system is shortened, and the overall denitration efficiency is lowered. Therefore, the research on the airflow organization in the SCR reactor is indispensable.

[0003] The system structure of the SCR reactor is related to the field parameters, and the research on the airflow distribution in the SCR reactor will lead to a long production cycle of the SCR reactor. At present, the determination of the structure of the SCR reactor in industry needs to be designed according to the field parameters, and the determination of the performance of the SCR reactor is through experimental research and numerical simulation of the SCR reactor, thereby leading to a long production cycle of the SCR reactor in industry. There are many structural parameters affecting the performance of the SCR reactor, including catalyst height, catalyst cross-sectional area, denitration device arrangement mode, etc. Therefore, each parameter needs to be researched and the interaction needs to be researched. For example, the arrangement mode of the denitration device mainly includes high-temperature high-dust, high-temperature low-dust, and low-temperature low-dust, which has different influences on the airflow organization. Therefore, reasonable structural parameters will affect the denitration effect and service life of the SCR reactor. Therefore, a system design-oriented SCR reactor digital design method and platform are provided. SUMMARY

[0004] The technical problem to be solved by the present application is how to comprehensively and reasonably design the SCR reactor, improve the denitration effect and service life of the SCR reactor, and research the airflow organization in the denitration system, and a system design-oriented SCR reactor digital design method is provided.

[0005] The present application solves the above technical problems by the following technical solutions, and the present application comprises the following steps:

[0006] S1: obtaining basic parameters through field investigation;

[0007] S2: designing catalyst parameters of the SCR reactor according to the obtained basic parameters;

[0008] S3: According to the obtained catalyst parameters, the SCR reactor body design is carried out, including the reactor body design and the equipment arrangement form design;

[0009] S4: According to the SCR reactor body design scheme, the CAD drawing of the corresponding SCR reactor body structure is drawn;

[0010] S5: According to the CAD drawing of the SCR reactor body structure, the three-dimensional structure model of the SCR reactor is established by using Solidworks, and saved in picture format;

[0011] S6: The internal gas flow organization simulation cloud picture of the SCR reactor is obtained by CFD software simulation, and saved in picture format;

[0012] S7: The CAD drawing of the SCR reactor body structure, the Solidworks model of the SCR reactor and the gas flow organization simulation cloud picture are stored as library files, which can be output for user to call and view.

[0013] Further, in the step S1, the basic parameters include coke oven flue gas flow q V , linear velocity L V , catalyst layer number N, catalyst activity constant K, catalyst specific surface area A2, SCR reactor inlet flue gas NO x concentration NO xin , SCR reactor outlet flue gas NO x concentration NO xout , and SCR reactor inlet ammonia concentration NH3.

[0014] Further, in the step S2, the catalyst parameters include catalyst layer cross-sectional area A cat , denitration efficiency η, ammonia nitrogen molar ratio M, catalyst volume V and catalyst height H cat .

[0015] Further, in the step S2, the design process of the catalyst parameters is as follows:

[0016] S21: According to the coke oven flue gas flow q V and the linear velocity L V , the catalyst layer cross-sectional area is determined:

[0017] S22: According to the SCR reactor inlet flue gas NO x concentration NO xin and the SCR reactor outlet flue gas NO x concentration NO xout , the denitration efficiency is determined:

[0018] S23: determining the chemical molar ratio of NH3 to NOx according to the concentration of NOx of the flue gas at the inlet of the SCR reactor and the concentration of NH3 of the flue gas at the inlet of the SCR reactor: x xin x The chemical molar ratio of NH3 to NOx is the molar ratio of ammonia nitrogen; x

[0019] S24: determining the volume of the catalyst according to the flue gas flow rate q of the coke oven, the denitration efficiency η, the molar ratio of ammonia nitrogen M, the catalyst activity constant K and the specific surface area A2 of the catalyst: V

[0020] S25: determining the height of the catalyst according to the volume V of the catalyst, the number of layers N of the catalyst and the cross-sectional area A of the catalyst layer: cat

[0021] Further, in the step S3, the reactor body design process is as follows:

[0022] S301: determining the cross-sectional area A of the SCR reactor according to the cross-sectional area A of the catalyst layer: cat scr cat ;

[0023] S302: determining the height H of the SCR reactor according to the number of layers N of the catalyst, the height H of the catalyst, the space height C1 required for supporting and installing the catalyst, the installation height of the rectifying layer and the space height C2 required for installation: cat cat ;

[0024] S303: determining the cross-sectional length / width of the SCR reactor according to the cross-sectional area A of the reactor: scr

[0025] Further, in the step S3, the specific process of designing the device arrangement form is as follows: selecting the arrangement form of the specific device on the interface of the SCR reactor digital design platform facing the system design, including the arrangement form of the denitration device, the cross-sectional length of the inlet flue, the cross-sectional width of the inlet flue, the cross-sectional length of the outlet section and the cross-sectional width of the outlet section.

[0026] Further, in the step S6, the airflow organization simulation cloud map of the SCR reactor interior includes the airflow organization simulation velocity cloud map of the SCR reactor interior and the airflow organization simulation pressure cloud map of the SCR reactor interior.

[0027] ​​​​​​​​​​The application further provides a system design-oriented SCR reactor digital design platform for use of the SCR reactor digital design method, comprising a catalyst parameter design module, an SCR reactor design module and a graphic output module.

[0028] The catalyst parameter design module is used for inputting the coke oven flue gas flow q V , the linear velocity L V , the catalyst layer number N, the catalyst activity constant K, the catalyst specific surface area A2, the concentration NO x of the SCR reactor inlet flue gas NO xin , the concentration NO x of the SCR reactor outlet flue gas NO xout , the concentration NH3 of the SCR reactor inlet ammonia gas on the catalyst parameter design interface, and obtaining the catalyst parameters by clicking the confirm button.

[0029] The SCR reactor design module is used for inputting the space height C1 required for supporting and installing the catalyst, the rectifier layer installation height and the space height required for installation and other parameters C2 on the reactor body design interface, and obtaining the reactor cross-sectional area A scr , the reactor height H and the reactor cross-sectional aspect ratio L by clicking the confirm button, and is used for determining the denitration device arrangement mode, the inlet flue cross-sectional area length and the inlet flue cross-sectional area width on the equipment arrangement form design interface, and further determining the equipment arrangement form of the SCR reactor.

[0030] The graphic output module is used for selecting the output results by multiple selection options, and can output the CAD diagram of the SCR reactor body structure, the Solidworks diagram of the SCR reactor, the simulation calculation grid diagram of the SCR reactor, the SCR reactor internal airflow organization velocity nephogram or the SCR reactor internal airflow organization pressure nephogram.

[0031] Further, in the graphic output module, the simulation calculation grid diagram of the SCR reactor is established according to the Solidworks diagram of the SCR reactor.

[0032] Compared with the prior art, the SCR reactor digital design method and platform for system design has the following advantages: the SCR reactor digital design method and platform for system design, through a series of field investigation parameters, designs the catalyst parameters of the SCR reactor based on the field investigation parameters, designs the SCR reactor body, and then obtains the structural model of the SCR reactor, and at the same time, the internal gas flow organization simulation cloud diagram of the SCR reactor is obtained, the SCR reactor is comprehensively and reasonably designed, the denitration effect and service life of the SCR reactor are improved, and the internal gas flow organization of the denitration system is researched; at the same time, the digital design platform meets the strategic development requirements of the state on industrial green development, energy saving and emission reduction, technological innovation and the like, is the embodiment of modern environmental engineering technological progress, and is a powerful support for future environmental protection work. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a flowchart of the SCR reactor digital design method and software compilation for system design in the embodiment of the present application;

[0034] Figure 2 is a CAD diagram (partial structure diagram) of the SCR reactor structure in the embodiment of the present application;

[0035] Figure 3 is a Solidworks diagram of the SCR reactor of Figure 2

[0036] Figure 4 is a SCR reactor simulation calculation grid diagram made by the model established by Figure 3

[0037] Figure 5 is an internal gas flow organization simulation velocity cloud diagram of the SCR reactor in the embodiment of the present application;

[0038] Figure 6 is an internal gas flow organization simulation pressure cloud diagram of the SCR reactor in the embodiment of the present application;

[0039] Figure 7 is an interface for establishing a directory structure in the embodiment of the present application;

[0040] Figure 8 is an interface for creating a database table in the embodiment of the present application;

[0041] Figure 9 is an interface for inserting data in the embodiment of the present application;

[0042] Figure 10 is an interface for writing an SCR system model using a MATLAB function in the embodiment of the present application;

[0043] Figure 11 ​​This is the software interface of the SCR reactor digital design platform in this embodiment of the invention. Detailed Implementation

[0044] The embodiments of the present invention are described in detail below. These embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments.

[0045] like Figure 1 As shown, this embodiment provides a technical solution: a digital design method for SCR reactors oriented towards system design, including the following steps:

[0046] Step 1: Obtain basic parameters through on-site investigation, such as coke oven flue gas flow rate q. V Linear velocity L V Number of catalyst layers N, catalyst activity constant K, catalyst specific surface area A2, NO in SCR reactor inlet flue gas x NO concentration xin NO in the flue gas from the SCR reactor outlet x NO concentration xout Parameters such as the concentration of ammonia (NH3) at the inlet of the SCR reactor;

[0047] Step 2: Based on the basic parameters obtained in Step 1, design the catalyst parameters for the SCR reactor and determine the catalyst bed cross-sectional area A. cat Denitrification efficiency η, ammonia-nitrogen molar ratio M, catalyst volume V and catalyst height H cat The parameters are as follows:

[0048] (1) The flow rate of coke oven flue gas q V and linear velocity L V Determine the cross-sectional area of ​​the catalyst layer

[0049] (2) NO from the inlet flue gas of the SCR reactor x NO concentration xin and NO in the flue gas from the SCR reactor outlet x NO concentration xout Determine denitrification efficiency

[0050] (3) NO from the inlet flue gas of the SCR reactor x NO concentration xin And the concentration of ammonia (NH3) at the inlet of the SCR reactor, to determine the relationship between NH3 and NO. x Chemical molar ratio NH3 and NO x The chemical molar ratio is the ammonia-nitrogen molar ratio;

[0051] (4) The catalyst volume V is determined by the coke oven flue gas flow q V , the denitration efficiency η, the ammonia nitrogen molar ratio M, the catalyst activity constant K and the catalyst specific surface area A2.

[0052] (5) The catalyst height H is determined by the catalyst volume V, the catalyst layer number N and the catalyst layer cross-sectional area A cat .

[0053] A set of data of the catalyst parameters of the SCR reactor design is shown in Table 1 below:

[0054] Table 1 Catalyst design parameters and related parameters

[0055] Parameter Parameter designation Parameter value Unit Coke oven flue gas flow rate q V ]]> 200 km 3 / h]]> Linear velocity L V ]]> 5～6 m / s Inlet flue gas NO x concentration]]> NO xin ]] 450 mg / m 3 ]] Concentration of NO in the exhaust gas x ​ NO xout ]] 50 mg / m 3 ]]> Concentration of inlet ammonia gas [CAT] 400 mg / m 3 ]]> Catalyst activity constant K 30 Catalyst specific surface area [A2] 550 m 2 / m 3 ]]> Catalyst layer number N 2+1 Layer Catalyst layer cross-sectional area A cat ]] 106 m 2 ]]> De-NOx efficiency η 95 ％ Ammonia nitrogen molar ratio M 0.9～1.0 Catalyst volume V 350 m 3 ]]> Catalyst height H cat ]]> 1.5 m

[0056] Step three, according to the SCR catalyst parameters obtained in step two, the SCR reactor body design is carried out, including the reactor body design and the equipment arrangement form design, to determine the reactor cross-sectional area A scr , the reactor height H, the reactor cross-sectional length-width ratio L and the equipment arrangement form, and the steps are as follows:

[0057] (1) The SCR reactor cross-sectional area A cat is determined by the catalyst layer cross-sectional area A scr = 1.15A cat .

[0058] (2) The SCR reactor height H = (N + 1) (C1 + H cat ) + C2 is determined by the catalyst layer number N, the catalyst height H cat , the space height C1 required for supporting and installing the catalyst, the rectifier layer installation height and the space height C2 required for installation.

[0059] It should be noted that the space height C1 required for supporting and installing the catalyst, the rectifier layer installation height and the space height C2 required for installation are also obtained through field investigation;

[0060] (3) The SCR reactor cross-sectional length / width is determined by the reactor cross-sectional area A scr .

[0061] A set of data of the reactor body design parameters of the SCR reactor design is shown in Table 2 below:

[0062] Table 2 Reactor body design parameters and related parameters

[0063]

[0064] (4) Select the arrangement of the specific device on the software interface, such as the arrangement of the denitration device, the length of the inlet flue cross section, the width of the inlet flue cross section, the length of the outlet cross section, the width of the outlet cross section, etc., and the scheme is shown in Table 3 as follows:

[0065] Table 3 Design parameters of the arrangement of the specific device

[0066]

[0067]

[0068] Step four, according to the design scheme of the SCR reactor body determined in step three, draw the CAD drawing file of the structure of the corresponding SCR reactor body, see Figure 2 .

[0069] Step five, according to the CAD drawing of the structure of the SCR reactor body obtained in step four, use Solidworks to establish a three-dimensional structure model of the SCR reactor, and save it in picture format, see Figure 3 .

[0070] Step six, obtain the simulation cloud picture of the internal gas flow organization of the SCR reactor by CFD software simulation, and save it in picture format, see Figure 5 , Figure 6 .

[0071] Step seven, store the CAD drawing of the SCR reactor body structure, the Solidworks model of the SCR reactor, and the simulation cloud picture of the gas flow organization as library files;

[0072] The detailed process is as follows:

[0073] (1) File conversion and standardization

[0074] Convert the CAD drawing to a universal format;

[0075] If the CAD drawing is not in a universal format (such as.dwg or.dxf), use the corresponding tool to convert it to these formats.

[0076] Solidworks model export;

[0077] Open the Solidworks model, select "File" -> "Save As", and then select the appropriate format for export, such as.STL (for mesh models) or.STEP / .IGES (for more complex geometric structures).

[0078] Gas flow organization simulation cloud picture processing

[0079] Ensure that the airflow organization simulation results are available in image formats (such as.png or.jpg) or data files (such as.csv). If using CFD software, you can export the results in these formats.

[0080] (2) Create library files

[0081] Create a directory structure. Create a folder structure to store all related files, see Figure 7 .

[0082] (3) Database integration

[0083] Select a database: Choose a relational database (such as MySQL, PostgreSQL) or NoSQL database (such as MongoDB) to store the metadata and paths of these files.

[0084] Create database tables: Create tables to store file information, see Figure 8 .

[0085] Insert data: Insert the prepared file information into the database, see Figure 9 .

[0086] (4) Develop the front-end interface

[0087] Select a front-end framework: Use a modern front-end framework (such as React, Angular, Vue.js) to develop the user interface.

[0088] Display file list: Get the file list from the database and display it on the front end.

[0089] In this embodiment, the steps in the above-mentioned SCR reactor digital design method are all realized based on the SCR reactor digital design platform. The interface of the SCR reactor digital design platform (SCR system digital simulation platform) is designed using Matlab GUI, and compiled into an executable program, thereby completing the construction of the SCR reactor digital design platform.

[0090] The specific process of using Matlab GUI to design the interface of the SCR reactor digital design platform and compiling it into an executable program is as follows:

[0091] (1) Determine the model and parameters of the SCR system

[0092] Reactor dynamics: Assume that the SCR system includes a reactor and a catalyst bed, the reactor uses ammonia and NOx as input, and the output is the exhaust gas. The catalyst bed uses Fe2O3 as the catalyst, the operating temperature is 200-400℃, the ammonia flow is 0-10mol / h, and the reactor volume is 1L.

[0093] Kinetic equations: For example, the kinetic properties of the reactor can be assumed to be a first-order reaction.

[0094] (2) Write model code for SCR system through MATLAB functions: MATLAB functions can be used to implement, see Figure 10 .

[0095] Simulink model: Build a virtual SCR system model in Simulink, integrate the SCR system model and control algorithm together. Control algorithms can be implemented using MATLAB Function or Stateflow modules.

[0096] (3) Design control algorithm

[0097] ID control or model predictive control: Select the appropriate control algorithm according to the needs, and write the control algorithm code in MATLAB.

[0098] Integrated into Simulink: Integrate the control algorithm with the SCR system model in Simulink for simulation testing.

[0099] (4) Simulation test

[0100] Adjust model parameters and control algorithm: Through simulation testing, adjust model parameters and control algorithm to verify the performance of the virtual SCR system.

[0101] Export the model: The virtual SCR system model can be exported to other simulation software for more complex system simulation and optimization.

[0102] (5) Design MATLAB GUI interface

[0103] Create GUI layout: Use MATLAB's GUIDE tool to create a GUI layout and add the required UI controls (such as buttons, text boxes, sliders, etc.).

[0104] Write callback functions: Write corresponding callback functions for each UI control to implement user interaction functions.

[0105] (6) Compile into executable program

[0106] Use MATLAB Compiler: Use MATLAB Compiler to compile MATLAB programs into independent executable programs (EXE files) to run on machines without MATLAB environment.

[0107] Deployment: Package the compiled executable program and related resource files and deploy them to the target machine.

[0108] The SCR reactor digital design platform in the embodiment includes the following three modules:

[0109] The catalyst parameter design module: by inputting the coke oven flue gas flow q V , linear velocity L V , catalyst layer number N, catalyst activity constant K, catalyst specific surface area A2, SCR reactor inlet flue gas NO x concentration NO xin , SCR reactor outlet flue gas NO x concentration NO xout , SCR reactor inlet ammonia concentration NH3 and other parameters on the catalyst parameter design interface, and clicking the OK button, the catalyst layer cross-sectional area, catalyst height and other technical parameters can be obtained.

[0110] The SCR reactor design module: the SCR reactor design includes two parts, namely, reactor body design and equipment arrangement form. By determining the space height C1 required for supporting and installing the catalyst, the rectifier layer installation height and the space height required for installation and other parameters C2 on the reactor body design interface, the reactor cross-sectional area A scr , reactor height H, reactor cross-sectional length-width ratio L and other technical parameters can be obtained. And by determining the denitration device arrangement mode, inlet flue cross-sectional area length, inlet flue cross-sectional area width and other parameters on the equipment arrangement form design interface, the arrangement form of the SCR reactor equipment can be determined.

[0111] The graphic output module: by selecting the results to be output through multiple selection options, the CAD diagram of the SCR reactor body, the Solidworks diagram of the SCR reactor, the simulation calculation grid diagram of the SCR reactor, the SCR reactor internal airflow organization velocity cloud diagram or the SCR reactor internal airflow organization pressure cloud diagram can be obtained.

[0112] On the SCR reactor digital design platform in the embodiment, the CAD diagram and Solidworks model of the SCR reactor with various different structural parameters can be drawn in advance, and the airflow organization simulation is performed by using CFD, and the results are saved in the picture format. By inputting the parameters on the software interface, the structural diagram and simulation diagram of the SCR reactor with the corresponding structure can be obtained.

[0113] The software interface of the SCR reactor digital design platform in the embodiment is shown in Figure 11 .

[0114] In summary, the SCR reactor digital design method and platform for system design of the above-mentioned embodiments, through a series of field investigation parameters, the catalyst parameters of the SCR reactor are designed based on the field investigation parameters, and the SCR reactor body is designed, and the structure model of the SCR reactor is obtained, and the internal airflow organization simulation cloud picture of the SCR reactor can be obtained, the comprehensive and reasonable design of the SCR reactor is realized, the denitration effect and the service life of the SCR reactor are improved, and the airflow organization in the denitration system is researched; at the same time, the digital design platform meets the strategic development requirements of the state on industrial green development, energy saving and emission reduction, technological innovation and the like, is the embodiment of the progress of modern environmental engineering technology, and is a powerful support for future environmental protection work.

[0115] Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and modifications to the above-mentioned embodiments within the scope of the present application.

Claims

1. A digital design method for SCR reactors oriented towards system design, characterized in that, Includes the following steps: S1: Basic parameters were obtained through on-site surveys; S2: Based on the obtained basic parameters, design the catalyst parameters for the SCR reactor; S3: Based on the obtained catalyst parameters, design the SCR reactor body, including reactor body design and equipment layout design. S4: Based on the SCR reactor body design scheme, draw the corresponding CAD drawing of the SCR reactor body structure; S5: Based on the CAD drawing of the SCR reactor body structure, use Solidworks to create a three-dimensional structural model of the SCR reactor and save it as an image. S6: Obtain a simulated cloud map of the airflow organization inside the SCR reactor using CFD software and save it as an image. S7: Save the CAD drawing of the SCR reactor body structure, the Solidworks model of the SCR reactor, and the airflow organization simulation cloud map as a library file, which can be output for users to call and view. In step S2, the catalyst parameters are designed as follows: S21: Based on the coke oven flue gas flow rate q V and linear velocity L V Determine the cross-sectional area of ​​the catalyst layer: S22: Based on the NO in the flue gas at the SCR reactor inlet... x NO concentration xin and NO in the flue gas from the SCR reactor outlet x NO concentration xout Determine the denitrification efficiency: S23: Based on the NO in the flue gas at the SCR reactor inlet... x NO concentration xin And the concentration of ammonia (NH3) at the inlet of the SCR reactor, to determine the relationship between NH3 and NO. x Chemical molar ratio: NH3 and NO x The chemical molar ratio is the ammonia-nitrogen molar ratio; S24: Based on the coke oven flue gas flow rate q V The catalyst volume is determined by the denitrification efficiency η, the ammonia-nitrogen molar ratio M, the catalyst activity constant K, and the catalyst specific surface area A2. S25: Based on catalyst volume V, number of catalyst layers N, and catalyst layer cross-sectional area A cat Determine catalyst height In step S3, the reactor body design process is as follows: S301: Based on the catalyst layer cross-sectional area A cat Determine the cross-sectional area of ​​the SCR reactor: A scr =1.15A cat ; S302: Based on the number of catalyst layers N and the catalyst height H cat The height of the SCR reactor is determined by the space height C1 required for supporting and installing the catalyst, the installation height of the rectifier layer, and the space height C2 required for installation: H = (N+1)(C1+H) cat )+C2; S303: Based on the reactor cross-sectional area A scr Determine the cross-sectional length / width of the SCR reactor:

2. The digital design method for SCR reactors oriented towards system design according to claim 1, characterized in that, In step S1, the basic parameters include coke oven flue gas flow rate q. V Linear velocity L V Number of catalyst layers N, catalyst activity constant K, catalyst specific surface area A2, NO in SCR reactor inlet flue gas x NO concentration xin NO in the flue gas from the SCR reactor outlet x NO concentration xout The concentration of ammonia (NH3) at the inlet of the SCR reactor.

3. The digital design method for SCR reactors oriented towards system design according to claim 2, characterized in that, In step S2, the catalyst parameters include the catalyst layer cross-sectional area A. cat Denitrification efficiency η, ammonia-nitrogen molar ratio M, catalyst volume V and catalyst height H cat .

4. The digital design method for SCR reactors oriented towards system design according to claim 3, characterized in that, In step S3, the specific process of equipment layout design is as follows: On the interface of the SCR reactor digital design platform for system design, select the specific equipment layout, including the denitrification unit layout, inlet flue cross-sectional length, inlet flue cross-sectional width, outlet cross-sectional length, and outlet cross-sectional width.

5. The digital design method for SCR reactors oriented towards system design according to claim 4, characterized in that, In step S6, the simulated airflow organization cloud map inside the SCR reactor includes the simulated velocity cloud map and the simulated pressure cloud map of the airflow organization inside the SCR reactor.

6. A digital design platform for SCR reactors oriented towards system design, characterized in that, Used for the digital design method of SCR reactor as described in any one of claims 1 to 5, including a catalyst parameter design module, an SCR reactor design module, and a graphics output module; The catalyst parameter design module is used to input the coke oven flue gas flow rate q on the catalyst parameter design interface. V Linear velocity L V Number of catalyst layers N, catalyst activity constant K, catalyst specific surface area A2, NO in SCR reactor inlet flue gas x NO concentration xin NO in the flue gas from the SCR reactor outlet x NO concentration xout 1. Set the concentration of ammonia (NH3) at the inlet of the SCR reactor. Click the OK button to obtain the catalyst parameters. The SCR reactor design module allows users to input parameters such as the required space height C1 for catalyst support and installation, the rectifier installation height, and the required space height C2 on the reactor body design interface, and then click the OK button to obtain the reactor cross-sectional area A. scr The reactor height H and reactor cross-sectional length-to-width ratio L are used to determine the equipment layout of the SCR reactor by determining the layout of the denitrification unit, the length of the inlet flue cross-sectional area, and the width of the inlet flue cross-sectional area on the equipment layout design interface. The graphics output module allows users to select the desired output through multiple options. It can output CAD drawings of the SCR reactor body structure, Solidworks diagrams of the SCR reactor, simulation calculation mesh diagrams of the SCR reactor, velocity cloud diagrams of the internal airflow organization of the SCR reactor, or pressure cloud diagrams of the internal airflow organization of the SCR reactor.

7. The SCR reactor digital design platform for system design according to claim 6, characterized in that, In the graphics output module, the simulation calculation mesh diagram of the SCR reactor is established based on the Solidworks diagram of the SCR reactor.

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