水力分级旋流器工艺参数匹配优化研究

Study on Process Parameter Matching Optimization of Hydrocyclone

针对选煤厂煤泥水处理中的水力分级旋流器存在工艺参数匹配不合理所导致设备分离性能偏低的问题。本文以选煤厂常用的YD350-14水力分级旋流器为研究对象,以分离效率和压力降作为旋流器分离性能的评价指标,基于响应面法与快速非支配排序遗传算法(NSGA-Ⅱ)模型开展对旋流器工艺参数(入料浓度、入料流量、安装角度)间的匹配关系研究。最终根据Perato前沿确定旋流器最佳工艺参数如下:在旋流器入料浓度12 g/L,安装角度80°,入料流量80 m^(3)/h时,可达到分离效率86.07%,压力降1155.62 Pa。对分离效率匹配模型进行现场验证,得出经过匹配后分离效率提高了5.07%,验证了该匹配模型能够有效提高旋流器的分离效率。本文研究为选煤厂中旋流器工艺参数的合理匹配提供理论依据,并为提高旋流器的分离效率开拓一个新的方向。

For the hydraulic grading hydrocyclone in the sludge water treatment of coal preparation plant,there is a problem of low separation performance of equipment due to unreasonable matching of variable parameters.In this paper,taking the YD350-14 hydraulic graded hydrocyclone commonly used in coal preparation plants as the research object,and the separation efficiency and pressure drop as the evaluation index of the separation performance of the hydrocyclone,the matching relationship between the variable parameters of the hydrocyclone(feed concentration,feed flow and installation angle)was studied and optimized based on the response surface method and the non-dominated sorting genetic algorithm(NSGA-II).Finally,according to the Pareto front,the best working parameters of the hydrocyclone are determined as follows:when the hydrocyclone feed concentration is 12 g/L,the installation angle is 80°,and the infeed flow is 80 m^(3)/h,the separation efficiency can be achieved by 86.07%,and the pressure drop is 1155.62 Pa.The field verification of the separation efficiency matching model shows that the separation efficiency is increased by 5.07%after matching optimization,which verifies that the matching model can effectively improve the separation efficiency of the hydrocyclone.This research provides a theoretical basis for the reasonable matching of the process parameters of the hydrocyclone in the coal preparation plants,and opens up a new direction for improving the separation efficiency of the hydraulic gradinghydrocyclone.