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Pulp consistency is an important value in paper making process, especially the consistency before the head box, which determines the paper quality. Conventional PID algorithm is used widely in the consistency control system, but the change of pulp-motor's speed and the shake of pulp's consistency may move the consistency out of the set-point. A fuzzy expert system based on experience is proposed here...
In multi-circuits pulp consistency control system, the paper put forward the assumption of dynamically updating relevant circuit parameters by using human-simulated intelligent control (HSIC) system. The paper also deduced measures that experienced operator might adopt on abnormal conditions after correctly analyzing the relationship of multi-stage control circuits. The practice shows that the coordination...
For an anaerobic treatment system, pH is an important environmental factor that can influence the activity of anaerobic bacteria. Especially in the final anaerobic process stage, the methane bacteria need the optimal pH range from 6.8 to 7.2. The control of PH is a difficult link in the anaerobic treatment system due to its nonlinearity and large time-delay. Aiming at the difficult point in the pH...
In this paper, an expert system (ES) developed for the monitoring and diagnosis of anaerobic wastewater treatment plants is presented. This system was used in the treatment of wastewater from a alkaline peroxide mechanical pulp (APMP) production factory. The reactor is expanded granular sludge bed (EGSB). The expert system puts emphasis on the monitoring and designing of two aspects of an anaerobic...
PH is an important environmental factor to anaerobic bacteria in anaerobic treatment system. Especially in the final anaerobic process stage, the methane bacteria need the optimal PH range from 6.8 to 7.2. According to the nonlinearity and large time-delay of PH control process, a novel method based on fuzzy PID control is proposed here, and corresponding simulations are realized to make comparison...
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