锅炉燃烧系统监测装置测量方法分析与应用

Analysis and application of measuring methods for the monitoring device of boiler combustion system

介绍锅炉燃烧系统监测装置一次风速及煤粉浓度各种测量方法的基本原理,对各自的技术特点、适用性和差异性等进行了分析对比,指出应根据制粉系统的形式及监测要求进行风粉监测技术方案的选择。针对不同炉型的特点,分别对一次风粉测量技术的实际应用进行了分析,并用实例说明了采用阻力转换法与速度-压差法相结合、自清灰式测速元件与静电法相结合分别对乏气送粉和直吹式送粉锅炉进行一次风粉在线监测的实现方案和应用效果。指出了大型锅炉一次风粉测量技术的发展趋势。

The basic principles of various measuring methods for PA velocity and pulverized coal concentration were introduced for the monitoring device of boiler combustion system. The respective technical features, applicability and differences were analyzed, based on which the selection methods of technology schemes were proposed for the air and coal-powder monitoring i. e. the scheme should be determined in accordance with the forms of coal pulverizing system and the monitoring requirements. Considering the characteristics of different boiler types, the practical application of PA monitoring technology was discussed. The realization and application effect of PA monitoring technologies were presented, which combined the methods of transferring resistance with velocity-different pressure, integrated the self- cleanup-dust velocity measuring component and static electricity. In addition, the trend of PA and coal powder measurement technology in large boilers was presented.