钢铁企业综合污水处理厂出水脱盐处理技术分析.docx

摘要摘 摘要 摘 要 钢铁企业要增产和发展，必须要寻求新的供水来源，而最直接、最经济、 最有效的是将综合排放污水经处理后回用。但是现在钢铁企业酝酿兴建或已建 的水治理工程，基本都未涉及脱盐工艺，处理后的水含盐量很高，不能适应钢 铁企业净循环水系统补充水要求。钢铁企业综合污水处理厂出水脱盐处理回用 是需要迫切解决的问题。 脱盐水处理的方法很多，但达到商品化和工业生产规模仅限于几种方法： 如低温蒸馏、多级闪蒸、离子交换和膜分离方法。根据综合比较结果，并结合 钢铁企业高盐水水质特点以及回用要求，本课题采用反渗透(RO)脱盐工艺， l司时采用超滤作为反渗透的预处理， 通过本次试验，证明超滤一反渗透双膜法在钢铁工业总排口综合污水处理 回收应用中是可行的。 还确定了以下内容：确定最佳的运行参数等，包括运行时间、反洗时间等； 确定处理钢铁企业总排口污水可行的超滤膜的水通量，为实际工程设计提供合 理的设计依据；确定系统的回收率；确定清洗周期及清洗药剂配方和药剂最佳 浓度；确定反渗透系统稳定运行的膜的通量。 根据钢铁企业综合污水的特点及首钢现场实验的结果，提出了工程应用方 案，并对膜研究与应用方面进行了展望。 关键词：钢铁废水；出水脱盐；超滤；反渗透 AbstractABSTRACT Abstract ABSTRACT That steel corporation want to increase production and develop must seek new source．The approach that the most direct，the most economic and the most effective is sewage reclamation． Bat at present the water treatment that steeI corporation have established and will establish aren’t relate to desalinization．The salinity of water treatment iS too high to fit steel corporation cycle and complement water．It is the question need solve imminency that steel corporation water treatment plant desalting and reclamation． The way of desalting water treatment is plenty，but only several kinds achieve to merchandizing and industrial production scale．The several kinds means low temperature distillation，multilevel flash evaporation，ion exchange and velum abruption．According to compare result,and combine water quality characteristic and reclamation require of steel corporation highly salinity，this problem choice reverse osmosis desalting,and at the same time choice ultrafiltration as pretreatment． According to this experiment，it is proved feasible that ultrafiltration--reverse osmosis double velum apply to steel corporation water treatment plant desalting and reclamation． Hereinafter content is confirmed：the best working parameter include runtime，backflush time，etc；the uitrafiltration velum flux that deal with discharge of steel corporation sewage； recovery of system；cleanout cycle；cleanout medicament prescription and the best thickne