A new method for protection of sewage collectors against corrosion

Victor Vasiliev, Iurii Stolbikhin

Abstract


The article provides data on microbiological (gas) corrosion of sewage collectors and structures on them. The results of inspection of Saint Petersburg structures are presented. The findings of the experiment for determination of stability of protective coatings conducted in a pressure suppression chamber in Novosibirsk are given. The known methods of corrosion prevention are considered in the work and a new one is offered, which is aeration of discharge liquid in the pressure suppression chamber by means of natural ejection of air into a penstock. The diagram of the effective construction of the pressure suppression chamber, allowing to implement the offered method, is presented. The carried out experiments on construction modeling of the pressure suppression chamber are described and optimal values of its geometrical parameters are given. The article also presents an engineering solution to collocation of the chamber and a gas cleaning plant on a sewage collector. Economic comparison of the offered method for protection of collectors versus the two most often used ones – fiberglass pipe lining and wall coating with polymer-silicate composition “Konusit KK-10” – is carried out. Cost estimation of fulfillment of the said methods for various diameters of the collector and its length is performed, as well as for various periods of time. Efficiency of the alternative way of corrosion prevention, offered by the authors, is proved.

Keywords


Pressure suppression chamber, microbiological corrosion, gas corrosion, protection against corrosion, examination of protective coatings, modeling of sewage structures

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References


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DOI: https://doi.org/10.23968/2500-0055-2016-1-2-58-67

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