Research on a Soft Measurement Method for Air Volume
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Abstract
Currently, there are often some problems in the air volume measurement system, which leads to air volume measurement and calculations inaccurate. Therefore, a method for measuring air volume based on the amount of oxygen and heat was proposed. First of all, through the process of smoke composition analysis, the formula for calculating the air volume using the amount of oxygen in the flue gas was derived. Then, the calorific value of the coal was used instead of the heat in the formula. Finally, the amount of coal was used for dynamic compensation. The result of the formula calculation had the same dynamic response rate as the actual air volume. By conducting an experiment on a 600 MW unit, the formula was verified, and then comparing the measured volume of soft measurement with the actual air volume under different operating conditions, the oxygen-heat-based soft-sensing method was found to be very good. The real-time air volume was reflected, and the accuracy was high and the response speed was good, which can meet the needs of the site.For the problem that air volume cannot be accurately measured at this stage, this soft measurement method can be effectively solved and widely applied in power plants.
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