大型循环流化床锅炉风帽阻力特性实验研究

Experiment Method of Large Scale CFB Boiler Nozzle Resistance Characteristics

循环流化床锅炉(CFB)是近年来发展起来的新一代高效、低污染清洁燃烧技术.风帽作为其重要装置会直接影响到循环流化床锅炉的运行。针对风帽阻力在已搭建的风帽阻力冷态试验台上,进行了Γ型风帽、支管角度分别为90°(60°、120°)且改变出口孔径时侧箭头型风帽的阻力试验。实验过程中,用U型压力计测量不同流量下风帽入口处的压力,计算风帽的压降大小,运用Origin软件进行数据处理,并对不同风帽的阻力进行比较,得出与Γ型风帽阻力最为接近的侧箭头型风帽形式。

The circulating fluidized bed boiler （CFB） is developed in recent years to a new generation of high efficiency, low pollution clean combustion technology. The distributor nozzle is an important device of circulating fluidized bed boiler, the nozzle resistance character directly affect the circulating fluidized bed boiler operation. It researches resistance of the Г type nozzle and the arrow-type nozzle wahen the angle of two vents is 90° （60° ,120° ）with different outlet apertures on the cold state bedstand. In the experimental process, measured pressure of the nozzle entrance in different flows with U type piezometer, calculate the nozzle pressure drop, then using the Origin software to process data and compare different nozzles of drag coefficient. Through the comparison combined with the actual obtains the most closely resistance coefficient of the arrow-type nozzle compared to the Г type nozzle.