密实固定床吸附塔床层阻力研究  

Study on bed resistance of dense fixed bed adsorption tower

作　　者：王库 韩思远 胡南[2] 刘科 张兆光 白杨 WANG Ku;HAN Siyuan;HU Nan;LIU Ke;ZHANG Zhaoguang;BAI Yang(The Fourth Research and Design Engineering Corporation,CNNC,Shijiazhuang 050021,China;University of South China,Hengyang 421001,China;Xinjiang Mining Co.,Ltd.,CNNC,Urumqi 830063,China)

机构地区：[1]中核第四研究设计工程有限公司,河北石家庄050021 [2]南华大学,湖南衡阳421001 [3]中核新疆矿业有限公司,新疆乌鲁木齐830063

出　　处：《中国矿业》2023年第11期230-235,共6页China Mining Magazine

摘　　要：密实固定床吸附塔是地浸矿山常用吸附设备,其在运行过程中床层阻力会随着吸附的进行不断增大,导致设备处理能力下降、能耗升高。床层阻力主要由两部分构成,一部分是床层本身阻力,另一部分是床层截留料液中絮泥而产生的阻力。本文首先测得4种空塔线速度下的树脂床层压降(床层本身阻力),分析结果显示,树脂床层压降正比于空塔线速度,近似呈直线关系;然后通过吸附试验,得到空塔线速度分别为35 m/h、45 m/h、60 m/h吸附条件下床层阻力的变化情况,分析显示床层阻力会随着吸附进行不断提高,且空塔线速度越高床层阻力升高越快。对吸附结束的树脂床层取样分析发现,堵塞存在于树脂床层上部0.3 m范围内,且主要集中在床层表面。对该区域树脂进行反冲洗,控制一定的流量,可以将大部分絮泥冲出,而树脂不随之流出,反冲洗结束后床层阻力基本可以恢复到吸附初期的水平。本文旨在研究影响床层阻力的主要因素,提出降低床层阻力的措施。Dense fixed bed adsorption tower is a common adsorption equipment in in-situ leaching mine.The bed resistance will increase with the adsorption process,leading to the decrease of equipment processing capacity and the increase of energy consumption.The bed resistance is mainly composed of two parts,one is the resistance of the bed itself,and the other is the bed interception in the slurry resistance.In this paper,the pressure drop(the resistance of the bed itself)of the resin bed under four kinds of empty tower linear speed is measured.The analysis results show that the pressure drop of resin bed is proportional to the empty tower linear speed,it’s almost a straight linear.Then,the changes of the bed resistance under the adsorption conditions of 35 m/h,45 m/h and 60 m/h respectively at the empty tower line speed are obtained by the test.The sample analysis shows that the bed resistance will continue to increase with the adsorption,and the higher the empty tower line speed,the faster the bed resistance increase.The sample analysis of the resin bed at the end of adsorption found that the blockage existed in the upper part of the resin bed within 0.3 m,and mainly concentrated on the surface of the resin bed.By backwashing the resin in this area and controlling a certain flow rate,most of the flocculation could be washed out,while the resin don’t flow out with it.After the backwashing,the bed resistance could basically recover to the level of the initial adsorption.This paper aims to study the main factors affecting bed resistance and propose measures to reduce bed resistance.

关 键 词：密实固定床 空塔线速度 床层阻力 床层解堵 

分 类 号：TD403[矿业工程—矿山机电]