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Fuzzy control method for series selective catalytic reduction system

A technology of fuzzy control and fuzzy controller, which is applied in the electronic control of exhaust treatment devices, diagnostic devices of exhaust treatment devices, exhaust treatment, etc., can solve problems such as ammonia leakage, and achieve the prevention of ammonia leakage and efficient NO and NH3, to avoid the effect of secondary pollution

Inactive Publication Date: 2017-02-22
SHANGHAI MARITIME UNIVERSITY
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Problems solved by technology

However, single SCR systems using only PID control usually have ammonia leakage problems

Method used

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  • Fuzzy control method for series selective catalytic reduction system
  • Fuzzy control method for series selective catalytic reduction system
  • Fuzzy control method for series selective catalytic reduction system

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Embodiment Construction

[0052] The technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments.

[0053] A fuzzy control method for a serial selective catalytic reduction system provided by the invention, the method comprises:

[0054] In the first step, according to the chemical reaction equation of selective catalytic reduction, the state equation is used to represent the selective catalytic reduction, and a mathematical model is established;

[0055] In the second step, adopt the mathematical model established in the first step, and use Simulink to establish a control model. Simulink can provide an integrated environment for dynamic system modeling, simulation and comprehensive analysis. The control model includes: fuzzy control module and series SCR fuzzy controller, the fuzzy control module and the series SCR fuzzy controller are equipped with NH 3 and NO input and output;

[0056] The third step, according to the NH of the fuzz...

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Abstract

The invention discloses a fuzzy control method for a series selective catalytic reduction system. The method comprises the following steps: step 1, expressing selective catalytic reduction by a state equation according to a chemical equation of the selective catalytic reduction, and establishing a mathematical model; step 2, establishing a control model by virtue of Simulink through adopting the mathematical model established in the step 1; step 3, obtaining a membership function graph, and establishing a fuzzy control method for controlling an ammonia injection amount of a selective catalytic reduction system; and step 4, setting the fuzzy control method established in the step 3 in a fuzzy control module, and running the control model to obtain a simulation result. The method disclosed by the invention is capable of strictly controlling the NH3 injection amount through adopting series SCR and the fuzzy control method to avoid secondary pollution caused by ammonia leakage, and capable of greatly realizing conversion efficiency with high NOX.

Description

technical field [0001] The invention relates to a selective catalytic reduction system, in particular to a fuzzy control method for a serial selective catalytic reduction system. Background technique [0002] In recent years, with the deterioration of the global environment and the enhancement of people's awareness of environmental protection, the issue of ocean-going ship exhaust emissions has attracted more and more attention from countries and related organizations, and regulations related to ship exhaust emissions have become more and more stringent. Nitrogen oxides (NOx) in ship exhaust X ) has caused serious pollution to the earth's atmospheric environment, so some national organizations have X Emissions standards are set. The International Maritime Organization (IMO) stipulates that NO in exhaust gas X content should be reduced to 70%, certain countries for NO X More stringent requirements have been set for emissions, for example, Sweden proposes NO emissions from...

Claims

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Application Information

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IPC IPC(8): F01N3/20F01N9/00F01N11/00F01N13/00
CPCF01N3/208F01N9/005F01N11/00F01N13/0093F01N2570/14F01N2570/18F01N2900/04Y02T10/12Y02T10/40
Inventor 尤坤张辉蒋楷
Owner SHANGHAI MARITIME UNIVERSITY
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