公开(公告)号：WO2016154505A1

公开(公告)日：2016-09-29

申请号：PCT/US2016/024131

申请日：2016-03-25

Applicant: VEOLIA WATER TECHNOLOGIES, INC.

Inventor： MACK, Benjamin ,  RITTOF, Timothy

IPC: C02F1/04 ,  C01D3/08 ,  C01D5/00 ,  B01D9/00 ,  C01B17/96 ,  C02F101/12 ,  C02F101/30

CPC classification number: C02F1/52 ,  B01D9/0004 ,  B01D9/0031 ,  B01D9/0059 ,  C01B17/96 ,  C01D3/08 ,  C01D3/16 ,  C01D3/20 ,  C01D5/16 ,  C02F1/04 ,  C02F1/048 ,  C02F1/283 ,  C02F1/441 ,  C02F2001/5218 ,  C02F2101/101 ,  C02F2101/12 ,  C02F2101/30 ,  C02F2103/10 ,  C02F2103/18 ,  C02F2103/365 ,  C02F2209/02

Abstract: A process is described for recovering alkali-chloride and alkali-sulfate salts from a salt solution. The salt solution comprises alkali metal, chloride and sulfate ions and is directed to a hydrous salt crystallization unit (28) which crystallizes hydrated sulfate salts that comprise sulfate and at least one alkali metal. A purged solution from the hydrous salt crystallization unit (28) is directed to a chloride salt crystallization unit (38) while the hydrated sulfate salt crystals are melted to form an aqueous sulfate solution which is directed to a sulfate crystallization unit (32). Anhydrous sulfate salts are crystallized from the aqueous sulfate solution to form sulfate salt crystals comprising sulfate and at least one alkali metal. In the chloride salt crystallization unit (38), chloride salt is crystallized to form chloride salt crystals. At least a portion of the purges from the sulfate and chloride salt crystallization units (32, 38) is directed to the hydrous salt crystallization unit (28).

Abstract translation: 描述了从盐溶液中回收碱金属氯化物和碱金属硫酸盐的方法。 盐溶液包含碱金属，氯化物和硫酸根离子，并被引导到水合盐结晶单元（28），其结晶包含硫酸盐和至少一种碱金属的水合硫酸盐。 来自含水盐结晶单元（28）的清洗溶液被引导到氯化物盐结晶单元（38），同时水合硫酸盐晶体被熔化以形成硫酸盐结晶单元（32）的硫酸盐水溶液。 无水硫酸盐从硫酸水溶液中结晶形成含硫酸盐和至少一种碱金属的硫酸盐晶体。 在氯化物盐结晶单元（38）中，氯化物盐结晶形成氯化物盐晶体。 来自硫酸盐和氯化物盐结晶单元（32,38）的清洗的至少一部分被引导到含水盐结晶单元（28）。

公开(公告)号：WO2017172348A1

公开(公告)日：2017-10-05

申请号：PCT/US2017/022254

申请日：2017-03-14

Applicant: VEOLIA WATER TECHNOLOGIES, INC.

Inventor： MACK, Benjamin

IPC: B01D1/14 ,  B01D1/28 ,  B01D3/00 ,  B01D3/06 ,  B01D3/10 ,  B01D5/00 ,  B01D19/00 ,  C02F1/04 ,  C02F1/06 ,  C02F1/10

Abstract: An evaporation system employs a thermocompressor to recover heat associated with a distillate produced by an evaporator and to use the recovered heat to preheat evaporator feedwater. In one example, the thermocompressor produces a thermocompressor discharge that is directed into the deaerator, contacting and preheating the evaporator feedwater passing therethrough. In another example, the thermocompressor discharge is directed through a barometric condenser which contacts evaporator feedwater therein and condenses and in the process preheats the evaporator feedwater.

Abstract translation: 蒸发系统采用热压缩机来回收与由蒸发器产生的蒸馏物相关的热量，并使用回收的热量来预热蒸发器给水。 在一个示例中，热压缩机产生导入到除气器中的热压缩机排气，接触并预热通过其中的蒸发器给水。 在另一个实例中，热压缩机排出物被引导通过气压冷凝器，该冷凝器与其中的蒸发器给水接触并冷凝，并且在该过程中预热蒸发器给水。