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Double-series-connection SCR system urea spraying rule cloud computing method based on PSO

A technology of SCR system and urea injection, applied in the electronic control of exhaust treatment device, diagnostic device of exhaust treatment device, exhaust treatment, etc., can solve problems such as non-compliance and inaccurate models, and achieve fast calculation speed, The effect of strong computing power and superior algorithm results

Active Publication Date: 2018-11-23
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the models based on the current control methods for urea injection volume are based on the assumption of homogeneity, which does not conform to the actual situation inside the SCR, and the established models are not accurate

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  • Double-series-connection SCR system urea spraying rule cloud computing method based on PSO
  • Double-series-connection SCR system urea spraying rule cloud computing method based on PSO
  • Double-series-connection SCR system urea spraying rule cloud computing method based on PSO

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] The present invention proposes a cloud computing method based on cloud predictive control and particle swarm optimization (PSO) for the urea injection law of the dual series SCR system. Using the method provided by the present invention, the high nitrogen oxides in the tail gas can be achieved by controlling the amount of urea injection. Conversion efficiency and ammonia (NH 3 ), the method is specifically:

[0019] Step 1. Establish a dual series SCR system in the exhaust gas post-treatment system, and establish a control model of the dual series SCR system according to the internal chemical reactions of the dual series SCR system;

[0020] Such as figure 1 Shown is a schematic diagram of the control science model of the dual-series SCR system of the present invention, the exhaust after-treatment system includes a diesel eng...

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Abstract

The invention discloses a double-series-connection SCR system urea spraying rule cloud computing method based on PSO, and belongs to the field of the control algorithm. The method specifically comprises the steps that firstly, according to the inner chemical reaction of a double-series-connection SCR system, a contrology model of the double-series-connection SCR system is established; secondly, according to the contrology model of the double-series-connection SCR system, a target function cost and a constraint condition function constraint are established in a cloud computing server; thirdly,the APSO algorithm based on the NMPC algorithm is applied to the cloud computing server, and the urea spraying rule through which the function value of the target function cost is the minimum, and theconstraint condition function constraint is achieved is solved. Through the provided method, the APSO algorithm which is the new optimization algorithm is applied to the NMPC algorithm, the urea spraying rule is calculated, the algorithm result is superior, and the computing speed is high; and meanwhile the urea spraying amount meeting the chemical reaction can be rapidly obtained online.

Description

technical field [0001] The invention belongs to the technical field of tail gas control and redox, and in particular relates to a cloud computing method for urea injection law of a double series SCR system based on cloud predictive control and particle swarm algorithm (PSO). Background technique [0002] In the past ten years, as my country's emission regulations have become more and more stringent, the issue of diesel engine exhaust emissions has attracted the attention of the general public. Since the diesel engine SCR (Selective Catalytic Reduction Technology) system has high conversion efficiency and fuel economy for catalytic reduction of nitrogen oxides (NOx) in the exhaust gas, it has become the most promising part of the exhaust gas after-treatment system, and it is also attractive attracted the attention of many researchers. The SCR system is widely used in diesel engines as part of the exhaust after-treatment system, and its main function is to reduce the emission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20F01N9/00F01N11/00
CPCF01N3/2066F01N9/005F01N11/00Y02T10/12Y02T10/40
Inventor 张辉石谦
Owner BEIHANG UNIV