| 摘要 |
<p>The invention reduces the amount of heat required for heating seawater in seawater desalination methods that use evaporation. The seawater desalination equipment is multi-stage flash-evaporation seawater desalination equipment (101), which is provided with a plurality of stages that are configured from small rooms (1) having a heat-transfer pipe (2) down which the seawater flows, a liquid pool (3) down which warm seawater that is warmer than the seawater flows, and a desalinated water catch pan (4) that collects desalinated water obtained by flash-evaporating the warm seawater pooled in the liquid pool (3) and cooling the steam with the seawater flowing down the heat-transfer pipe (2); and is characterized in being configured so that the seawater introduced into the seawater desalination equipment (101) as warm sea water is different from the other seawater and the seawater and warm seawater are made to flow down each stage in opposite directions, and in providing a flow-adjusting valve (6) upstream from the inlet end of the heat-transfer tubes (2). The flow-adjusting valve adjusts the flow of seawater into the seawater desalination equipment (101) so as to equal the flow of the warm seawater into the seawater desalination equipment (101), or adjusts the flow so that the difference in temperature between the warm seawater and the seawater is maintained at both the upstream side and the downstream side of the direction of seawater flow in the seawater desalination equipment (101).</p> |
