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Method and device for estimating NOx measurement delay at inlet of denitrification system

A technology for system inlet and delay estimation, applied in the field of NOx measurement delay estimation at the inlet of denitrification system

Active Publication Date: 2021-09-10
DATANG ENVIRONMENT IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for estimating the NOx measurement delay at the inlet of the denitrification system based on physical-information fusion, aiming to solve the above-mentioned problems in the prior art

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  • Method and device for estimating NOx measurement delay at inlet of denitrification system
  • Method and device for estimating NOx measurement delay at inlet of denitrification system

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Embodiment 1

[0063] According to an embodiment of the present invention, a device for estimating NOx measurement delay at the inlet of a denitrification system based on physics-information fusion is provided, image 3 It is a schematic diagram of the NOx measurement delay estimation device at the inlet of the denitrification system based on the physical-information fusion of the first device embodiment of the present invention, as shown in image 3 As shown, the NOx measurement delay estimation device at the inlet of the denitrification system based on physical-information fusion according to the embodiment of the present invention specifically includes:

[0064] The determining and collecting module 30 is used to determine variables related to NOx at the inlet of the selective catalytic reduction SCR reactor, and collect historical operation data related to the variables, wherein the variables specifically include: target variables and auxiliary variables; wherein, The variables specifica...

Embodiment 2

[0086] An embodiment of the present invention provides a device for estimating NOx measurement delay at the inlet of a denitrification system based on physical-information fusion, such as Figure 4 As shown, it includes: a memory 40, a processor 42, and a computer program stored on the memory 40 and operable on the processor 42. When the computer program is executed by the processor 42, the following method steps are implemented:

[0087] Step 101, determining variables related to NOx at the inlet of the Selective Catalytic Reduction (SCR) reactor, and collecting historical operating data related to the variables,

[0088] That is to say, in step 101, the mechanism of flue gas generation and SCR mechanism of the coal-fired unit is analyzed. Determine the variables related to the NOx at the inlet of the SCR reactor, specify the target variable and auxiliary variable, and collect the historical operation data related to the inlet NOx; among them, the variables specifically inclu...

Embodiment 3

[0109] An embodiment of the present invention provides a computer-readable storage medium, where a program for realizing information transmission is stored on the computer-readable storage medium, and when the program is executed by the processor 42, the following method steps are implemented:

[0110] Step 101, determining variables related to NOx at the inlet of the Selective Catalytic Reduction (SCR) reactor, and collecting historical operating data related to the variables,

[0111] That is to say, in step 101, the mechanism of flue gas generation and SCR mechanism of the coal-fired unit is analyzed. Determine the variables related to the NOx at the inlet of the SCR reactor, specify the target variable and auxiliary variable, and collect the historical operation data related to the inlet NOx; among them, the variables specifically include: target variables and auxiliary variables; among them, the variables specifically include: SCR reactor Inlet NOx, unit load, total air v...

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Abstract

The invention discloses a method and device for estimating NOx measurement delay at the inlet of a denitrification system. The method includes: determining variables related to NOx at the inlet of a selective catalytic reduction SCR reactor, and collecting historical operating data related to the variables, wherein , the variables specifically include: a target variable and an auxiliary variable; a physical experiment measurement method is used to determine the delay time measured by the flue gas measurement system, and the inlet NOx sequence is corrected according to the delay time, and the sample space of the target variable is reconstructed to obtain the reconstructed target variable; calculate the mutual information value of the reconstructed target variable and the auxiliary variable at different delay times based on the mutual information method; determine the NOx delay time at the inlet of the SCR reactor according to the mutual information value, and determine the delay time according to the delay time The inlet NOx sequence is corrected, the auxiliary variable sample space is reconstructed, and the reconstructed auxiliary variable is obtained. The invention can eliminate the influence of pure delay and improve the accuracy of inlet NOx modeling.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification in coal-fired power plants, in particular to a method and device for estimating NOx measurement delay at the inlet of a denitrification system based on physics-information fusion. Background technique [0002] In the existing technology, with the promulgation of a series of national policies and regulations, such as "Air Pollution Prevention and Control Law", "Emission Standards of Air Pollutants for Thermal Power Plants", "Regulations on the Collection and Use of Pollutant Discharge Fees", "Comprehensive Implementation of Coal-fired Power Plants The Air Pollutant Emissions of Coal-fired Power Plants Has Been Strictly Regulated, and Each Power Plant Has Carried Out Ultra-Low Emission Retrofits. It has become an imperative task for my country's power plants to develop perfect denitrification technology for thermal power plants and reduce the discharge of pollutants from power plant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G16C20/10
CPCG16C20/10
Inventor 孟磊袁照威谷小兵白玉勇李广林李本锋王力光杜明生
Owner DATANG ENVIRONMENT IND GRP
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