| 发明名称 | Process and system for treating water | ||
| 摘要 | A process for producing ultrapure water, in which a stream of water is purified in a reverse osmosis device, wherein the water stream is subject to pretreatment including splitting the water stream into at least two partial streams, partial exchange of cations present in at least one of the partial streams for H+ ions by a cation exchanger operated in the H+ mode, and complete exchange of the anions present in at least one further of the partial streams for OH− ions by a softener operative in parallel to the cation exchanger, and treating the partial streams treated by the cation exchanger and the softener by at least one anion exchanger operating in the OH− mode, and wherein the water stream obtained from the pretreatment is fed into the reverse osmosis device. | ||
| 申请公布号 | US8980095(B2) | 申请公布日期 | 2015.03.17 |
| 申请号 | US201113812215 | 申请日期 | 2011.07.22 |
| 申请人 | BWT Aktiengesellschaft | 发明人 | Johann Jürgen |
| 分类号 | C02F1/42;C02F9/00;B01D61/02;B01D61/04;C02F1/44;B01D15/10;C02F1/66;C02F5/00;C02F103/04 | 主分类号 | C02F1/42 |
| 代理机构 | DLA Piper LLP (US) | 代理人 | DLA Piper LLP (US) |
| 主权项 | 1. A process for producing ultrapure water, in which a stream of water is purified in a reverse osmosis device, wherein the water stream is subject to a pretreatment comprising: splitting the water stream into at least two partial streams, exchange of cations present in at least one of the partial streams for H+ ions by a cation exchanger operated in the H+ mode, and exchange of the hardness causing species present in at least one further of the partial streams for soft ions by a softener operative in parallel to the cation exchanger, and treating the partial streams treated by the cation exchanger and the softener by at least one anion exchanger operating in the OH− mode, and wherein the water stream obtained from the pretreatment is fed into the reverse osmosis device. | ||
| 地址 | AT | ||