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SCR inlet NOX concentration prediction system and method based on index prediction model

A prediction model and concentration prediction technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problem that the control effect cannot meet the environmental protection assessment requirements, the PID feedback adjustment method loses control significance, and the SCR inlet concentration data cannot be obtained and other problems to achieve the effect of avoiding excessive NOX concentration at the outlet, avoiding unstable control quality, and convenient installation

Inactive Publication Date: 2020-12-11
XIAN THERMAL POWER RES INST CO LTD
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Problems solved by technology

Due to the inability to obtain accurate and valid SCR entry NO X Concentration data, the traditional PID feedback adjustment method loses control significance
Therefore, even though various types of advanced control strategies have been successfully applied to the control process of the denitrification control system, their control effects still cannot meet the requirements of environmental protection assessment.

Method used

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  • SCR inlet NOX concentration prediction system and method based on index prediction model
  • SCR inlet NOX concentration prediction system and method based on index prediction model
  • SCR inlet NOX concentration prediction system and method based on index prediction model

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Embodiment Construction

[0020] The present invention is described in further detail below in conjunction with accompanying drawing:

[0021] Such as figure 1 As shown, the SCR inlet NO of the present invention based on the exponential prediction model X Concentration prediction system includes weight transmitter 1, speed transmitter 2, primary air volume transmitter 3, secondary air volume transmitter 4, oxygen volume transmitter 5, primary air pressure transmitter 6, controller 7 and distributed Control system 8; controller 7 is connected with weight transmitter 1 and speed transmitter 2, controller 7, primary air volume transmitter 3, secondary air volume transmitter 4, oxygen volume transmitter 5 and primary air pressure Transmitter 6 is connected with distributed control system 8; Distributed control system 8 is provided with for calculating and predicting SCR inlet NO X Concentration of SCR Inlet NOX Concentration Prediction Module 9 .

[0022] SCR entrance NO based on index prediction model ...

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Abstract

The invention discloses an SCR inlet NOX concentration prediction system and method based on an index prediction model. The SCR inlet NOX concentration prediction system comprises a weight transmitter, a rotating speed transmitter, a primary air quantity transmitter, a secondary air quantity transmitter, an oxygen quantity transmitter, a primary air pressure transmitter, a controller and a decentralized control system. The controller is connected with the weight transmitter and the rotating speed transmitter, the controller, the primary air quantity transmitter, the secondary air quantity transmitter, the oxygen quantity transmitter and the primary air pressure transmitter are connected with the decentralized control system, and the SCR inlet NOX concentration prediction system and methodcan accurately predict the NOX concentration of an SCR inlet.

Description

technical field [0001] The invention belongs to the field of automatic predictive control of power plant boiler denitrification, and relates to an SCR inlet NO control system based on an exponential predictive model. X Concentration prediction system and method. Background technique [0002] my country has always been a country that uses coal as its main energy source, and this energy pattern will not change for a long period of time. With the continuous development of the new energy industry and the increasingly stringent national environmental protection requirements, the issue of nitrogen oxide emissions from coal-fired power plants has gradually become the focus of attention. How to effectively reduce the amount of ammonia injection while ensuring the denitrification efficiency has become an urgent problem to be solved for denitrification and ammonia injection control. [0003] For some units that have been put into operation for a long time, the measurement device, es...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/56
CPCB01D53/8625
Inventor 郭亦文耿林霄王林高林周俊波王明坤侯玉婷
Owner XIAN THERMAL POWER RES INST CO LTD
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