A cloud computing method of urea injection law in double series scr system based on apso
A technology of SCR system and urea injection, applied in the electronic control of exhaust treatment devices, diagnostic devices of exhaust treatment devices, machines/engines, etc., can solve problems such as inaccurate models and inconsistencies, and achieve strong computing power, The effect of fast calculation speed and superior algorithm results
Active Publication Date: 2021-01-26
BEIHANG UNIV
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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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[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 improved particle swarm optimization algorithm (APSO) for the urea injection law of the dual-series SCR system. Using the method provided by the present invention, the nitrogen oxides in the tail gas can be realized by controlling the amount of urea injection. High 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 i...
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The invention discloses a PSO-based cloud computing method for the urea injection rule of a double-series SCR system, which belongs to the field of control algorithms. The specific steps include: step 1, establishing a control science model of the double series SCR system according to the internal chemical reaction of the double series SCR system; step 2, establishing an objective function in the cloud computing server according to the control science model of the double series SCR system cost and constraint function constraint; step 3, use the APSO algorithm based on NMPC algorithm in the cloud computing server to obtain the urea injection law that minimizes the value of the objective function cost function and satisfies the constraint function constraint. Through the method provided by the invention, the APSO algorithm, a new optimization algorithm, is applied to the NMPC algorithm to calculate the urea injection law. The algorithm has superior results and fast calculation speed; at the same time, the urea injection amount required to meet the chemical reaction can be quickly 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 improved particle swarm algorithm (APSO). 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 th...
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IPC IPC(8): F01N3/20F01N9/00F01N11/00
CPCF01N3/2066F01N9/005F01N11/00Y02T10/12Y02T10/40
Inventor 张辉石谦
Owner BEIHANG UNIV