NOx online prediction method and system based on intelligent method

A prediction method and prediction model technology, applied in the direction of neural learning methods, instruments, biological neural network models, etc., can solve problems such as measurement lag and inaccurate measurement

Pending Publication Date: 2021-03-12
DATANG ENVIRONMENT IND GRP
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Problems solved by technology

[0007] The purpose of the present invention is to provide a NOx online prediction method and system based on an intelligent method, which overcomes the

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  • NOx online prediction method and system based on intelligent method
  • NOx online prediction method and system based on intelligent method
  • NOx online prediction method and system based on intelligent method

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[0029] Reference will now be made in detail to the exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. The detailed description, which will be given below with reference to the accompanying drawings, is intended to explain exemplary embodiments of the present invention, rather than to show the only embodiments that can be implemented according to the present invention. The following detailed description includes specific details in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without these specific details.

[0030] In some instances, well-known structures and devices are omitted or shown in block diagram form, focusing on important features of the structures and devices, so as not to obscure the concept of the present invention. The same reference numerals will be used throughout the specification to re...

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Abstract

The invention discloses an NOx online prediction method and system based on an intelligent method, and the method comprises the steps: analyzing a flue gas generation mechanism of a coal-fired unit and an SCR system mechanism, determining an input variable of an NOx emission prediction model, collecting operation data related to NOx emission, and constructing training set data; reducing an input dimension by adopting a PCA algorithm based on the collected training set data, and reconstructing a sample space; establishing an SCR inlet NOx dynamic prediction model by adopting an LSTM recurrent neural network model; and obtaining operation data related to the NOx emission amount at the current moment, and determining the optimal SCR inlet NOx prediction value at the current moment. By means of the method, the SCR inlet NOx concentration is predicted in advance, the ammonia spraying amount is adjusted in time, the SCR inlet NOx prediction precision is improved, and the method has guiding significance in pollutant emission and cost of a coal-fired unit.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification in coal-fired power plants, in particular to an intelligent method-based NOx online monitoring method and system. Background technique [0002] At present, most of the energy consumption in my country's power industry comes from coal combustion, which will produce a large amount of air pollutants, causing serious environmental pollution problems. NOx is one of the main pollutants emitted by coal-fired power plants. Its emission into the atmosphere will undergo a series of physical and chemical reactions to generate a variety of harmful substances, causing great harm to the environment and human body. Therefore, in order to control NOx emissions, the Ministry of Environmental Protection and the General Administration of Quality Supervision and Quarantine have formulated strict NOx emission standards for coal-fired thermal power plants. In this context, how to accurately measure th...

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Application Information

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IPC IPC(8): G06K9/62G06N3/04G06N3/08G06Q50/06
CPCG06N3/08G06Q50/06G06N3/044G06N3/045G06F18/2135
Inventor 袁照威孟磊江澄宇谷小兵马务
Owner DATANG ENVIRONMENT IND GRP
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