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

Abstract

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 vapor quality is improved.

Description

Technical field [0001] The invention relates to the technical field of chemical reagents, in particular to a chemical cleaning agent for cleaning filter elements. Background technique [0002] With the rapid development of high-parameter and large-capacity generator sets, controlling the water vapor quality of the thermal system within the qualified range is an important measure to ensure the safe and economic operation of the generator set. [0003] At present, the condensate polishing system of power plants mostly adopts the configuration of pre-filter plus high-speed mixed bed desalination. The main function of the pre-filter of the condensate polishing system is to remove iron oxides produced during the cycle operation of the thermal system 2. Impurities such as silicate colloids and suspended solids play an important role in preventing high-speed mixed bed ion exchange resin pollution and improving water vapor quality. Commonly used pre-filters include covering filters, resin...

AI Technical Summary

Problems solved by technology

[0005] According to the analysis of the scale components on the filter element surface of the pre-filter of the condensate polishing system in many power plants, it mainly includes silicon dioxide, iron oxide, copper oxide, burning increase and decrease, etc., among which the composition of silicate accounts for The ratio is the largest, up to 36.6%, and the iron oxide content is 28.8%. The traditional cleaning agent mainly for iron oxide removal cannot remove silicate scale more effectively, resulting in poor cleaning effect of the filter element, and cannot fundamentally Restore the interception capacity of the filter element

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