Pre-filming agent, pre-filming treatment method and application thereof

The invention relates to the technical field of circulating water treatment, and discloses a pre-filming agent, a pre-filming treatment method and application of the pre-filming agent and the pre-filming treatment method. The pre-filming agent provided by the invention comprises alkali metal borate, a deoxidizing agent and alcohol amine, in the pre-filming agent, the weight ratio of the alkali metal borate to the deoxidizing agent to the alcohol amine is 1: (0.3-0.55): (0.07-0.15), and the pre-filming agent has the advantages of being small in dosage, fast in filming, good in filming effect and high in environmental friendliness. Moreover, when the pre-filming agent provided by the invention is used, pollution discharge replacement is not needed, so that the technological process of circulating water treatment is shortened, and the waste of water resources is also reduced. 本发明涉及循环水处理技术领域，公开了一种预膜剂和预膜处理方法及其应用。本发明提供的预膜剂包括碱金属硼酸盐、脱氧剂和醇胺，其中，所述预膜剂中，碱金属硼酸盐、脱氧剂和醇胺的重量比为1:0.3-0.55:0.07-0.15，其具有用量少、成膜快、成膜效果好、环境友好性高的优点。而且