电去离子(EDI)装置运行调整及优化

电去离子(EDI)是将混床树脂填充于离子交换膜之间并在直流电场作用下实现连续除盐的新型水处理技术,兼具电渗析连续除盐和离子交换深度脱盐的优点。与传统混合离子交换设备相比,EDI装置离子交换和再生是同步的,可实现连续生产,出水水质稳定,节省了传统离子交换再生的酸碱消耗和配套设备。长庆石化公司EDI装置3年来的稳定运行经验表明,通过调整及优化进水流量、浓水流量、电压等参数,可保证EDI装置高效、稳定运行;在装置设计允许范围内,可适当增大或减小进水流量来调整进水的电导率处于合适的范围内,以提高产水效率;浓水流量是调节装置平衡的重要参数,对装置中的电流有直接影响;确定浓水流量下限对于除硅(Si)具有重要意义;可以通过考察出水水质变化、弱电离子漏出量来判断装置的平衡状态。

The Commissioning and Optimization of EDI Units

Electrodeionization(EDI) is a new type of water treatment technology,in which mixed bed resin is filled in between ion-exchange membranes to achieve continuous desalination in the presence of a direct current field.This technology combines the merits of the electro dialysis continuous desalination method and the ion-exchange membrane deep desalination method.Compared with traditional mixed ion exchange equipment,EDI units' ion exchange and regeneration are synchronous,thus allowing for continuous production...