管道输送危险废物泵送压力试验研究  

Experimental study on pumping pressure of pipeline transportation of hazardous waste

作　　者：郭光明[1] 郑晓雯[1] 吴淼[1] Guo Guangming;Zheng Xiaowen;Wu Miao(School of Mechanical Electronic&Information Engineering,China University of Mining&Technology-Beijing,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083

出　　处：《矿业科学学报》2021年第1期82-90,共9页Journal of Mining Science and Technology

基　　金：国家自然科学基金(51075389);国家自然科学基金青年科学基金(51406106);高等学校博士学科点专项科研基金(2010002311006)。

摘　　要：蒸馏残渣与危废污泥混合物料通过管道输送到水泥回转窑焚烧是最优的协同处置危险废物的方法。物料是固-液两相流,黏性大,并混有铁皮、木材,固体泵长距离泵送是个难题。本文基于固体泵脉动式工作原理,通过分析管道压力的组成及产生机理,建立了基于稳态流动时的泵送压力数学模型及管道压力试验平台,管道输送含污泥质量分数为35%的混合物,每米水平摩阻损失为3.1 kPa,摩阻损失折算系数比为水平1 m∶垂直1 m∶水平90°弯头∶垂直90°弯头=1∶3∶16∶18。试验结果表明,配伍污泥质量分数为35%~40%的物料,泵送压力均随污泥质量分数的增加呈指数增加,与流速成线性关系,温差系数为1.5,重启系数为1.1,屈服应力系数为1.1。Mixing hazardous waste such as distilled residue and hazardous waste sludge which are piped to cement rotary kilns for incineration is the optimal method of co-processing of hazardous waste in China.Solid pump can be pumped over long distances is a difficult problem because the mixture is highly viscous and belongs to solid-liquid two-phase flow mixed with iron and wood.Firstly,the composition and mechanism of pipeline pressure is studied based on the principle of pulsating solid pump.Secondly,a mathematical model of pumping pressure suitable for engineering applications combined with the temperature difference coefficient,restart coefficient and yield stress coefficient was established.Thirdly,the pipeline pressure test platform was build.The results show that the pressure loss is 3.1 kPa at 35%sludge mass fraction and the loss conversion coefficient of horizontal 1 m∶vertical 1 m∶horizontal 90°elbow∶vertical 90°elbow is 1∶3∶16∶18.Fourthly,the recommended sludge mass fraction is 35%~40%by the slump test.Finally,the experiment showed that the pumping pressure increased exponentially with the increase of sludge mass fraction and was linear with flow velocity.The temperature difference coefficient is 1.5.The restart coefficient is 1.1 and the yield stress coefficient is 1.1.

关 键 词：危险废物 协同处置 水泥窑 管道输送 泵送压力 塌落度 屈服应力 

分 类 号：X76[环境科学与工程—环境工程]