№1|2014

WASTEWATER TREATMENT

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UDC 628.292.001.24

DAGILEV M. A.

Calculating the capacity of a receiving tank of a sewage pumping station

Summary

Methods of designing pumping stations according to the requirements of the updated version of SNiP 2.04.03-85 – «Set of rules 32.13330.2012. Code. Sewers. Public utilities» are presented. The basic requirements of the regulatory document and pumping unit manufacturers to the design of pumping stations are considered. It has been established that to provide for correct designing the minimum effective capacity of the pumping station receiving tank with several single-type pumps meeting the requirement to the number of pump starts is necessary: it should not exceed the maximum permissible number of starts for a definite time period. It is evident that the maximum number of starts occurs when all the normal pumps are in operation except one that is operating in turns. A formula of calculating the required effective capacity of a pumping station receiving tank with several single-type normal pumps has been derived. An optimal principle of pump operation at similar pumping stations is determined, pump operation modes, their start and shutdown levels are conside­red. An example of calculating the effective capacity of a pumping station receiving tank is set. Possible reducing the pumping station footprint is shown. The use of the suggested formulae for calculating the effective capacity of a pumping station receiving tank with guaranteed failure-free operation of the pumping units during the entire life cycle and retai­ning the manufacturer’s warranty is substantiated.

Key words

sewerage pumping station , pump , receiving tank , cycle time , capacity , effective capacity

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REFERENCES

  1. Diagilev M. A. [Calculating the capacity of receiving tanks of sewage pumping stations with submersible pumping units]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2009, no. 11, pp. 61–62. (In Russian).
  2. Dеsign recommendations for pump stations with midrange centrifugal Flygt wastewater pumps. http://www.ittwww.com (accessed December 17, 2013).
 

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