Desalination process专利检索-液化天然气燃料气体燃料燃料种类专利检索查询-专利查询网

Desalination process

阅读：965发布：2023-05-17

专利汇可以提供Desalination process专利检索，专利查询，专利分析的服务。并且The freeze desalination of sea water is accomplished using the refrigeration potential released during the regassification of liquified natural gas. Sea water feed is cooled in an ice melter and feed cooler to near freezing, the feed is mixed with cold brine, and the feed is passed to a crystallizer wherein ice crystals are formed by direct contact with a refrigerant which has been cooled by the evaporation of the liquid natural gas. Ice crystals are separated from a slurry led from the crystallizer and the ice crystals are fed into the ice melter and feed cooler in which a refrigerant in a closed cycle condenses to melt ice and evaporates to cool feed. Fresh water is separated from condensed refrigerant in the ice melter and feed cooler. Refrigerant is stripped from the fresh water and brine passing from the system. In the crystallizer, gaseous refrigerant emerging from the feed is condensed by liquid refrigerant spraying into a tray suspended above the feed.，下面是Desalination process专利的具体信息内容。

权利要求

2. The process according to claim 1 wherein in step (d) the feed is mechanically agitated for mixing with the slurry in the crystallization zone.

3. The process according to claim 1 with the additional step of storing liquid refrigerant, refrigerant from storage being recirculated through the heat exchanger in step (b) and refrigerant from storage being sprayed into the crystallizer in step (e), sprayed and condensed refrigerant withdrawn from the crystallizer being partly introduced into the crystallization zone and being partly recirculated for further cooling in step (f).

4. The process according to claim 3 wherein, in step (i) ice is melted to cool incoming feed used in step (c).

5. The process according to claim 4 wherein step (i) comprises the steps of (j) introducing the ice onto first plates in a closed container of a melter-cooler having a liquid refrigerant therein, (k) introducing feed onto second plates in the container, the liquid refrigerant vaporizing on contact with the feed on the second plates anD condensing to melt ice on the first plates, and (l) decanting melted ice from liquid refrigerant and withdrawing the melted ice from the container, liquid refrigerant flowing in the container onto the second plates to contact and cool feed on vaporizing.

6. The combination according to claim 5 wherein in step (h) part of the brine is recycled by being mixed with feed in step (c), and the remainder of the brine is passed from the system.

7. The combination according to claim 6 wherein the melted ice in step (l) is stripped of refrigerant and the brine in step (h) is stripped of refrigerant.

8. The process according to claim 7 wherein the refrigerant of steps (b), (d), (e) and (f) is n-butane, the n-butane being sprayed into the vapor span of the crystallizer at a temperature below 20*F. in step (e), the temperature of the n-butane introduced into the crystallization zone being within 5*F. of the temperature of the feed.

9. The combination according to claim 8 wherein the refrigerant in the melter-cooler is n-butane, the melter-cooler at an equilibrium pressure and temperature of about 16 psia at 34*F.

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