Filtering element chemical cleaner for prefilter of condensate polishing system and application

The invention discloses a filtering element chemical cleaner for a prefilter of a condensate polishing system and application. The filtering element chemical cleaner comprises an alkaline cleaner A and an acid stripper B, wherein the alkaline cleaner A comprises analytical pure sodium bicarbonate , hydrogen peroxide and sodium dodecyl benzene sulfonate; and the acid stripper B comprises analyticalpure glycolic acid, formic acid and sodium fluoride. The application method of the filtering element chemical cleaner comprises the steps of acid washing to strip salt deposits, alkaline washing to remove oil stains and rinsing with clear water. The filtering element chemical cleaner is used for cleaning the prefilter of the condensate polishing system and can remove iron oxide in a filtering element as well as silicate, copper oxide, the oil stains and the like, therefore, a filtering element channel of the prefilter is restored, a running pressure difference is lowered, the running cycle isprolonged, and water vapo