Boiler Exhaust Temperature Control Based on Weight Factor Self-correction Algorithm
The conventional control of boiler exhaust gas temperature mainly uses operating condition parameters to control temperature rise pa-rameters,ignoring the disturbance of external environmental temperature on temperature values,resulting in higher average heat capacity and flow rate in the control results.Therefore,a PLC control method for boiler exhaust gas temperature based on weight factor self correction algo-rithm is proposed.Based on the heat transfer coefficient of boiler flue gas,the dynamic characteristics of its exhaust gas temperature are ana-lyzed.A weight factor self correction algorithm is constructed based on the maximum exhaust gas temperature.The temperature disturbance value is corrected by substituting the thermal conduction time difference,external environmental temperature,and heat conduction blockage weight factor.The PLC program logic is defined to achieve the control of boiler exhaust gas temperature.The experimental results show that the control results obtained after the application of the proposed method exhibit a lower average heat capacity flow rate,higher stability of the controlled exhaust gas temperature,and meet the control requirements for boiler combustion exhaust gas performance.
boiler smoke exhaustsmoke exhaust temperatureweight factor self correction algorithmtemperature control
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