Treatment method of process wastewater in nuclear power plant

一种核电厂工艺废水的处理方法

Abstract

本发明涉及一种放射性废水的处理方法。为解决现有核电厂工艺废水处理存在的二次废物量大、能耗大等诸多问题,本发明提供了一种核电厂工艺废水的处理方法。该方法包括如下步骤:(一)在工艺废水中添加化学絮凝剂,对胶体态放射性核素进行絮凝;(二)将工艺废水通过活性炭层,滤除胶体态放射性核素絮凝物,并吸附去除大部分非胶体态放射性核素;然后,通过沸石层进行吸附,进一步去除剩余的放射性核素;(三)将工艺废水通过离子交换处理,以去除盐分并实现pH调节。本发明的核电厂工艺废水的处理方法最大程度的减少了离子交换树脂的用量,显著降低了二次废物量;避免了蒸发过程的采用,大大降低了能耗,具有较好的经济性。
The invention relates to a treatment method of radioactive wastewater, and solves the problem that in a conventional treatment method of process wastewater in a nuclear power plant is large in secondary waste quantity, high in energy consumption and the like. The invention provides a treatment method of process wastewater in a nuclear power plant. The treatment method comprises the following steps: (1) chemical flocculants are added in process wastewater, and colloidal radionuclides are flocculated; (2) the process wastewater after being treated in the step (1) passes through an active carbon layer, colloidal radionuclide floccules are filtered out, and most of non-colloidal radionuclides are removed through adsorption; then the process wastewater passes through a zeolite layer to be adsorbed to further remove rest of radionuclides; (3) the process wastewater after being treated in the step (2) is subjected to ion exchange to remove salt and achieve pH regulation. The treatment method minimizes the use amount of ion exchange resin, reduces the secondary waste quantity remarkably, eliminates an evaporation process, reduces the energy consumption greatly, and has better economy.

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