A Fuzzy Control Method Combined with Optimal Feed-Forward for Dry Desulfurization of Slurry Fluidized Bed Boiler

Abstract:

It is the most effective resource use practices for coal slurry to be used as fuel for fluidized bed boiler. The dry desulfurization of slurry fluidized bed boiler is a large time delay system, and the load disturbance of this system changes frequently. In order to achieve stable control of SO2 emission and meet environmental requirements, a fuzzy control technology combined with the optimal feed-forward was designed. Combined with field experience, a fuzzy controller system was designed by fuzzy control technology, and then the integral process was added to achieve non-error track. To reduce the impact of desulfurizer and other factors, based on the principle of feed-forward, an objective to minimize disturbance impact was obtained, and then a nonlinear programming problem for solving the optimal feed-forward parameters was established, from which the best feed-forward form can be obtained. Results of 440T/H fluidized bed boiler show that the proposed method has satisfactory control effect. SO2 concentration can fully meet environmental emission requirements, and its fluctuation is relatively small.

• Periodical: Advanced Materials Research (Volumes 610-613)
• Pages: 1676-1681
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.610-613.1676
• Online since: December 2012
• Authors: Ai Peng Jiang, Qiang Ding, Jian Wang, Weiwei Lin, Zhou Shu Jiang
• Keywords: Desulfurization, Feed-Forward, Fuzzy, Optimization, Slurry

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