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首页> 外文期刊>International journal of nuclear desalination >Experiences with the conventional pretreatment system in the seawater reverse osmosis plant at Kalpakkam
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Experiences with the conventional pretreatment system in the seawater reverse osmosis plant at Kalpakkam

机译：Kalpakkam海水反渗透工厂中常规预处理系统的经验

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摘要

A 1800 m~3/day Seawater Reverse Osmosis (SWRO) plant was commissioned in October 2002 at Kalpakkam, India, as part of the Nuclear Desalination Demonstration Project (NDDP). The conventional pretreatment scheme was adopted consisting of a lamella clarifier, pressurised sand filter, activated carbon filter and cartridge filter. The dosing of pretreatment chemicals, ferrous sulphate and polyelectrolytes was done at optimum levels to keep the Silt Density Index (SDI) value between 3 and 4. Experimental trials indicated that the dosing of chemicals may not be necessary below a particular turbidity level. Similarly, the dosing of proprietary antiscalant chemicals instead of sodium hexametaphosphate to control the sulphate scaling did not affect the process performance. Rather it helped the operation, as the antiscalant is in liquid form and the addition of hydrochloric acid could be eliminated. The overall cost per unit water production was also reduced.
机译：作为核海水淡化示范项目（NDDP）的一部分，2002年10月在印度卡尔帕卡姆启用了1800 m〜3 / day的海水反渗透（SWRO）工厂。采用的常规预处理方案包括薄层澄清池，加压砂滤池，活性炭滤池和筒式滤池。预处理化学品，硫酸亚铁和聚电解质的投加量应保持在最佳水平，以使淤泥密度指数（SDI）值保持在3到4之间。实验试验表明，在特定的浊度水平下，化学药剂的投加量可能不是必需的。类似地，控制六种偏磷酸钠而不是六偏磷酸钠来控制硫酸盐的结垢也没有影响工艺性能。相反，它有助于操作，因为防垢剂为液体形式，可以消除盐酸的添加。单位水生产的总成本也降低了。

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