新型煤粉流量调节阀性能研究

Study on Performance of New Type Flow Regulating Valve for Pulverized Coal

在煤粉密相输送实验装置中，研究了工业规模级管径的新型煤粉流量调节阀性能。通过改变阀门参数和操作条件，观察阀芯结构对煤粉输送特性的影响。在对不同阀芯结构的阀门进行系统测试与分析的基础上，得出了优选的阀芯结构。研究结果表明，在相同煤粉流量下，不同阀芯结构的阀门所获得的固气比大致相等；在优选的阀芯结构下，当节流面积变化范围为12％～100％，与之对应的煤粉流量调节范围为50％-96％；随着节流面积的减小，煤粉输送稳定性变弱。

Research on the performance of the new flow regulating valve in industrial scale bore size for pulverized coal is carried out on the dense phase pneumatic conveying experimental device. Through changing the parameters and operational conditions, the influence of the structures of valve trim on conveying characteristics is observed. On the basis of systematic tests and analysis for valves with different structure of valve trims, the optimal trim configuration is obtained. The results of research indicate that under the same flow rate of pulverized coal, the solid-gas ratios obtained under different valve trim configurations are basically equal; under optimal configuration, with throttle area changing from 12% to 100% , corresponding regulating range of flow for pulverized coal is 50% to 96% ; the smaller the throttling area are, the poorer the stability of conveying is.