Smart Instrument Of Boiler Air Flow Measurement

Today,in the power plant,the safety of boiler and its protection have been become more and more important. The measurement and supervisory of the boiler's air flow is becoming the one of the essential conditions that keep the boiler would run safety and stable sustainedly. Measurement precision contribute to improving the security class and economic of boiler running and automatic level of whole plant.The smart measurement instrument of the boiler's air flow designed in the thesis and the instrument can make the degree of accuracy get to .Firstly,the thesis build the "velocity-area" method which is on basis of "Log-Tchebycheff" on the analyzing of basic measure method of boiler's air flow.Secondly,Model86 averaging Pitot tube was selected the right model of flow transducer which can pickoff the differential pressure and static pressure.ModelC264 which made in Setra System Corp.U.S.A was selected as ultra low differential pressure transmitter.A good flow of boiler's air was calculated by offsetting pressure and temperature.Finally, numeroscope was designed with Z80CPU and other chips.