Analysis of Two Air-Fuel Ratio Regulating Methods of Combustion System

Recently,the air-fuel ratio is regulated with the proportional control valve in the combustion systems of newly homemade aluminum melting fumaces,but both the old homemade furnaces and some newly imported furnaces still employ the flow-meter to regulate the air-fuel ratio.So,it is necessary to analyze and compare the two methods in the respects of system constituents,control accuracy,application field and economic benefit.