| 摘要 |
<p>Distn. plant employs a powered evaporator to vaporise a liq. beneath a transparent cover on which vapour condenses. The condensate is collected, usually by gravity into a drainage cutter. The improvement is that a moving element is used to clean the condensing surface of the cover, continuously or intermittently, and push the condensate into the drainage gutter. The moving element can be a manually operated or power driven wiper, similar to an automobile windscreen wiper. Alternatively, the moving element can be a fluid, e.g. the droplets of condensate can be blown clear by compressed air or washed away by a liq. such as pre-collected condensate. Used for purificn. of solns. etc. by distillation, partic. the desalination of sea water etc. or provide drinking water. By cleaning the condensing surface the tiny droplets of condensate are no longer allowed to impede and reflect solar radiation. The energy is utilised more efficiently in heating the liq. to be distilled. A distillation plant with cleaning element has a production capacity about 60% higher than the same plant without cleaning element.</p> |
