№11|2013

PIPELINE SYSTEMS

bbk 000000

UDC 628.214:532.595.2

Primin O. G.

Ensuring reliable and environmentally safe operation of pressure sewers

Summary

Surge in a pipeline is a significant factor that is affecting the environmental safety and reliability of the public wastewater disposal system. In case of an emerging surge noticeable pressure fluctuations occur that could cause pipeline burst and damage of the related hydraulic and mechanical equipment (pumps, valves etc.). It results in sewage spills, material and environmental losses. The main causes of an emerging surge in municipal pressure sewers can be as follows: mains fai­lure, imperfections of the control schemes of the main pumping units at the sewage pumping stations. To ensure reliable operation of the pumping stations the use of hydromechanical devices as well as of high-speed emergency switching on automatic and protection devices including controlled electric drives and softstarters is provided. It was determined that in wastewater disposal practice hydromechanical fittings that reduce the surge effect shall be used. To prevent from surge water discharge through bypasses with installing safety valves and hydraulic tanks is used. In addition to wastewater discharge from pumping stations pressure sewers of intricate shape shall be equipped with air intake and relief devices at the intermediate points. It is found that surges in operation of sewage pumping stations can be eliminated by improving the reliability of external power supply by establishing truly independent power sources, designing combined power supply schemes, high-speed automatic switchover devices in 6–10 kV switchboards of big stations.

Key words

, , , ,

The further text is accessible on a paid subscription.
For authorisation enter the login/password.
Or subscribe

REFERENCES

  1. Otstavnov A. A., Primin O. G., Khre­nov K. E., Khar’kin V. A., Orlov V. A. O gid­roudarakh v podzemnykh truboprovodakh iz polietilenovykh trub [On surges in underground polyethylene pipelines]. Santekhnika. Otoplenie. Konditsionirovanie (S.O.K.), 2012, no. 3, pp. 12–14. (In Russian).
  2. Pupyrev E. I., Primin O. G. Metody povysheniia ekologicheskoi bezopasnosti truboprovodov kanalizatsionnykh setei [Methods of improving environmental safety of sewage pipelines]. Ekologiia i Promyshlennost’ Rossii, 2013, no. 3, pp. 13–17. (In Russian).
  3. Pravila ustroistva elektroustanovok [Rules of electric installation devices]. Moscow, Energoatomizdat Publ., 1986, 124 p. (In Russian).
  4. Khramenkov S. V., Primin O. G. Reglament ekspluatatsii kanalizatsionnykh nasosnykh stantsii [Sewage pumping station operating regulations]. Moscow, Miklosh Publ., 2007, 216 p. (In Russian).
  5. Otchet NIR 11-278. Razrabotka meropriiatii po povysheniiu nadezhnosti raboty kanalizatsionnoi seti s tsel’iu minimizatsii ekologicheskikh riskov [Research project report 11-278. Elaboration of measures to improve sewer reliability to minimize environmental risks]. Moscow, Institute «MosvodokanalNIIproekt» OJSC, 2012, 76 p. (In Russian).
  6. Khramenkov S. V., Khrenov K. E., Koz­lov M. N., Shushkevich E. V., Bogomolov M. V., Men’shchikova O. A. Opyt vnedreniia innovatsionnoi tekhniki dlia predotvrashcheniia gidravlicheskogo udara [Experience of introduction of innovation technique for prevention of a water hammer]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2010, no. 10, p. 1, pp. 6–13. (In Russian).
  7. Leznov B. S. Energosberezhenie i reguliruemyi privod v nasosnykh i vozdukhoduvnykh ustanovkakh [Power efficiency and variable speed drive in pumping units and air blowers]. Moscow, Energoatomizdat Publ., 2006, 306 p. (In Russian).
  8. Almeida A. T., Ferreira F. J. T. E., Both D. Technical and economical consideration in application of variable speed drives with electric motor systems. IEEE Transactions on Industry Applications, 2005, vol. 41, no. 1, pp. 188–198.
  9. Krylov Iu. A. Razrabotka energosberegaiushchikh tekhnologii v toplivno-energeticheskom khoziaistve goroda na osnove sovremennogo elektroprivoda [Deve­loping power efficient technologies for the municipal fuel and energy facilities on the basis of the advanced electric drive: Dissertation for the degree of Doctor in Engineering]. Moscow, MEI (TU), 2008, 213 p. (In Russian).

vstmag engfree 200x100 2

mvkniipr ru

Российская ассоциация водоснабжения и водоотведения

Конференция итог

ecw20 200 300

VAK2