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UDC 628.14:62-531.3
Galiullin M. F., Rodin N. V., Bychkov D. A., Gerasimov D. S.
Automation of water supply in the Tumen distribution network
Summary
In 2016 the system of automated control of the second-lift water pumping stations of the Metelevskii and Velizhanskii water intakes was put into industrial operation. For the first time the functions of maintaining the standard operating pressure and supply of the required water amount from the second-lift pumping stations to the municipal water distribution network were automated. Introducing the complex of controlling the operation of the second-lift pumping stations on the basis of the data on the pressure in the dictating points of the network in real time mode provided for qualitatively improving the operation efficiency of the distribution network. The introduction of the automated process control system in the water supply allowed reducing pressure fluctuation in the municipal distribution network. The result was the reduction of the failure rate. Automatic maintaining the operation mode of the municipal distribution network provided for eliminating the excess pressure at the pumping stations that were unavoidable in the manual control mode. According to the expert estimates the potential of pressure reduction in the collection pipelines of the second-lift pumping stations of the Metelevskii and Velizhanskii water intakes is 10–15%. The reduction of the energy consumption with the use of a variable speed drive will be equal to the pressure reduction.
Key words
water intake , pumping station , frequency-regulated electric drive , pressure monitoring , dictating points , water supply system optimization
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UDC 628.1:658.26.004.18
Moiseev A. V., Riffel E. V., Furmanova Yu. I., Syryakov V. V., Mazepo M. V.
Introduction of energy saving measures in Krasnodar Vodokanal
Summary
The aspects of efficient energy consumption by water and wastewater utilities are of primary importance. In order to reduce the energy consumption constituent of the production costs certain energy saving measures are introduced aiming to the development and improvement of the process technologies, upgrade of equipment and controls. This approach is provided by the development of market relations, deficiency of energy resources and, consequently, by the energy price increase. The energy consumption pattern of an enterprise is determined by the type of products manufactured or services rendered. The principle procedure of an energy audit of the pumping stations operated by Kransnodar Vodokanal; the basic technical solutions on the water supply upgrade are presented alongside with the comparison of the calculated and actual cost savings resulted from the introduction of the energy saving measures.
Key words
water supply system , pumping station , power saving , energy audit , frequency regulation
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UDC 628.14.001.57
Butko A. V., Kur'ianov S. A., Shibaeva N. A.
The use of geographic information systems in the Rostov Vodokanal operations
Summary
The efficient operation of water supply systems in the cities is impossible without using advanced geographic information technologies. They provide for accumulating and organizing significant amounts of the daily incoming data that characterize the process and energy parameters of different equipment at the water and wastewater facilities – from water intakes to effluent outfalls. The information from 44 master control points, 80 water pumping stations of the first through fourth stages, potable and process water meters, meters of the effluent discharged into the surface water bodies is acquired in real-time mode. Processing this information, controlling and adjusting 45 pressure control valves and other work related to maintaining the set process flow pattern at the water and wastewater facilities located on the territory of more than 34,850 hectares require reliable assistants. These particular assistants, ZuluHydro and ZuluDrain home-made systems, are used by the engineers and technicians of «Rostovvodokanal» JSC in their routine work. The practical use of the processed information in the analytical and operational activities significantly reduces the time for making technologically correct decisions and provides for obtaining real benefits in the form of reduced energy costs and saving in material resources consumption.
Key words
water supply , pumping station , water disposal , software package , pressure regulator , geoinformation system , hydraulic model , certification of infrastructure facilities , metering arrangement , telemetry , hydraulic model, analysis of the accident cause
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UDC 621.929
DOI 10.35776/VST.2023.07.06
Grigor’eva Anastasiia
Study of the optimal mode of sludge agitation in the receiving tank of a wastewater pumping station
Summary
Sludge agitation in the receiving tank of a wastewater pumping station is a rather serious problem due to the high risks of the pumping equipment failure, sludge caking and decay inside the tank. As a rule, sludge settling control methods provide for emptying only the area close to the suction nozzles of the pumps. In the rest of the tank, the caked sludge is periodically washed out by hand during maintenance or minimum filling. A comparison is made between two methods of sludge agitation in the receiving tank of a wastewater pumping station. In the first case, sludge is agitated hydraulically, i. e., using pipelines located along the perimeter of the tank. In the second, conical mixers of improved geometry are used, that is, sludge is agitated mechanically. A comparison of mixing efficiency was made using CFD-modeling. According to the results of modeling the hydrodynamics of mixing, during the operation of conical mixers, no stagnant zones is actually formed in the near-bottom mixing area.
Key words
treatment facilities , pumping station , mathematic modelling , conical mixers , sludge agitation
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UDC 628.12: 628.171.001.24
Kirsanov A. A., Kolchev V. N., Shmigol V. V., Chernosvitov M. D.
Research in Relift Pumping Stations
Summary
Results of the research in operation of relift pumping stations of Samara (water consumption, pressure in the suction and pressure pipelines) are presented. The aligned graphs of distribution of specific water consumption, an average value of factual specific water consumption and coefficients of irregularity, diagrams of annual and daily changes of water consumption are given. The comparison of results obtained with the standards in force is made. Values of specific consumption of 5 and 95% provision and also a probability of ingress of factual water consumption into the interval defined by the standard specifications are determined. The efficiency of the use of frequency regulation at intra-block pumping stations is substantiated.
Key words
water meter , head , pumping station , diagram of water consumption , hourly irregularity , frequency converter
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UDC 628.16.027:628.543
Egorova Yu. A., Kichigin V. I., Nesterenko O. I.
Study of the chemical and physical composition of raw water at the pumping-filtration stations of Samara
Summary
The results of the study of physical, chemical and bacteriological composition of the raw water at the pumping-filtration stations in Samara for the period of 2011–2015 are presented. The limits of water quality variation by 53 indicators were determined. It was proved that the actual BOD/COD ratios were significantly lower compared to the critical value 0.5, i. e. the incoming raw water at the pumping-filtration stations in Samara contained mainly resistant to oxidation inorganic matter requiring physical and chemical treatment. It was shown that the microbiological quality of the incoming raw water at PFS-1 was worse compared to the raw water quality at PFS-2. The statistically reliable values of the physical and chemical indicators of the raw water at the water intakes in Samara were determined that provided for establishing an automated data base in «Samarskie Kommunal’nye Sistemy» LLC for predicting the required modes of drinking water purification.
Key words
water intake , reagent , pumping station , raw water , water quality prediction
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UDC 628.147.2.004.69
Ivashchenko G. I., Moiseev A. V., Riffel E. V., Shevchuk S. V., Yakimov S. Yu., Furmanova Yu. I.
Integrated Approach to Optimization of Operation of the Water Supply and Distribution System of the City of Omsk
Summary
An integrated approach to the optimization of operation of the water supply and distribution system of large cities based on hydraulic modelling with the use of modern software products is proposed. A possibility of adaptation to actual conditions of calculated results obtained by electronic simulation of water supply networks is shown on the example of Omsk. The solution of this problem makes it possible to model the necessary changes in the composition and mode of operation of each of the elements of a water supply network. The result of such an approach is reduction in the accident rate at networks and energy savings at pumping stations. Methods of execution of works, means of the measurement used, sequence of measures to be taken, the results obtained and possible prospects are presented.
Key words
zoning , pumping station , water supply and water distribution system , hydraulic modeling , power saving , reduction in accident rate , water supply reliability
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UDC 628.12/.14+628.17
Rakitskii D. S., Egorova Yu. A., Nagornyi S. L., Tabunkov A. S., Polst'ianov V. N., Vorob'ev A. G., Chernosvitov M. D., Shmigol V. V.
Integrated approach to the upgrade of booster pumping stations in Samara
Summary
The applicability of improving the reliability and energy efficiency of the water supply system of Samara is specified. The main methods and means of step-by-step implementation of the plan of upgrading booster pumping stations are described. The description of software and hardware system chosen for the implementation of the set task is presented. The data on the reduction of the total power consumption by 37 pumping stations is given. Frequency regulation of the pumping units operation provided for 40% reduction of the power consumption; the introduction of the adaptive regulating algorithm for the stations with parallel operation of several pumping units provided for 27% reduction of power consumption. The estimated reduction of power consumption with replacing pumping units after the introduction of the adaptive regulating algorithms was 18%. 8% reduction of the failure rate in the distribution network owing to the average pressure reduction in the distribution network and due to the improvement of the operational control efficiency by obtaining complete exact information on the process parameters in real-time mode was noted. The system introduction predetermined operating personnel downsizing and simplifying the organizational-technical measures for the maintenance of the pumping stations. The criteria expedient to be used in estimating the operation efficiency of the stations are indicated. The diagrams of the operation parameters of a number of upgraded pumping stations are presented. The recommendations on the further upgrade of the booster pumping stations on the Samara territory are quoted.
Key words
water supply system , energy efficiency , pumping station , pump operation regulation , specific power consumption
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UDC 628.1/.2
Strelkov A. K., Biriukov V. V., Shuvalov M. V., Egorova Yu. A.
Concept of the development and upgrade of the Samara water supply and wastewater disposal systems
Summary
The information on laying down the concept of the development and upgrade of the water supply and wastewater disposal systems of Samara urban district for 2018–2047 by Academy of Civil Engineering and Architecture in cooperation with the experts from «Samarskie Kommunal’nye Sistemy» LLC is presented. In the process of the concept development water supply and wastewater disposal balance flow-sheets by engineering districts were compiled alongside with the inventory of the major operating facilities of the water supply and wastewater systems, water mains and sewers that are subject to technical upgrade. The analysis of the capacity reserves of the water supply and wastewater disposal systems with the purpose of supplying water to the communities located near the boundaries of Samara urban district was carried out on the basis of the current dynamics of the total and net water supply for the past 7 years. Herewith newly-annexed perspective building sites, load distribution among the facilities, the efficiency of wash water reuse were taken into account. Measures on reducing energy consumption by the water and wastewater utilities and increasing the efficiency of the wastewater treatment facilities were developed. Possible full automation of the pumping station and water treatment plant of, the use of the Aeroport-2 settlement water treatment plant for tertiary treatment of water supplied from pumping-filtration station-2 (PFS-2); the use of filtration plants of the municipal pumping-filtration station and pumping-filtration station-3 (PFS-3) for tertiary treatment of water transported from PFS-1 and PFS-2, booster pumping stations of municipal pumping-filtration station and PFS-3 are considered.
Key words
pumping-filtration station , pumping station , water supply and sewerage networks , public water supply and wastewater disposal systems , concept of development , water supply and wastewater disposal systems upgrade
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UDC 628.31.504.3.054
Rublevskaya O. N.
Measures on preventing malodors release at the facilities
of SUE «Vodokanal of St. Petersburg»
Summary
SUE «Vodokanal of St. Petersburg» has been introducing and testing different equipment for gas purification with the aim of preventing malodors release at the wastewater facilities. The experience of applying gas purification technologies at these facilities is analyzed. It was determined that the specified features of STOPKR sorption-plasma-catalytic gas purification unit and OPVS biological air oxidizing unit are efficiently used at the sewage pumping stations. The economic inexpedience of using STOPKR method at input concentrations of toxic substances higher than 1 g/m3 is a disadvantage. Testing OPVS filter in sewers showed positive results. The disadvantages of OPVS filter are in clogging of filter elements during operation as well as difficulties in processing multicomponent gas mixtures and mixtures of variable composition because of the specificity of the resulting microbial strains. The results of pilot testing TSUF-2000-400-I gas purification system showed the absence of malodors around sewer wells and convenient operation of the unit. The use of different filters including GreenKomplekt carbon filter-based units did not give any meaningful results. To control odor at the wastewater sludge landfills fine spraying of deodorant solution along the periphery of the landfill was suggested. At the sludge incineration plants exhaust gases pass three-stage purification with the use of electrostatic precipitation. At the wastewater treatment facilities the construction of either entire process flow or partially closed system was suggested. The prospects if introducing various technical and technological methods at each of the wastewater facilities are determined.
Key words
reeking substances , sludge , pumping station , sludge incineration plant , treatment facilities , sorption-plasma-catalytic unit , biological air oxidizing unit , landfill
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UDC 628.12
DOI 10.35776/VST.2024.12.03
Войтов И. В., Еловик В. Л.
Method of simulating operation modes of centrifugal pumps with variable speed drives
Summary
The method of simulating operation modes of centrifugal pumps regulated by varying the impeller rotation frequency over the entire range of calculated feed rates as well as calculating their energy consumption for the design period is presented. The method is primarily focused on the use of computing technology for calculating and analyzing the operating modes of centrifugal pumps and can be used as the basis for developing the corresponding software. The use of the method in a feasibility study of the introduction of an adjustable electric drive at a pumping station will provide for justifying the feasibility of the planned activities. The use of a digital model of the operating modes of a pumping station improves the quality of design owing to the in-depth development of individual elements.
Key words
adjustable electric drive , energy efficiency , simulation , pumping station , water supply-sewerage services , pumping unit , calculation method
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UDC 628.147.2
Karmazinov F. V., Melnik E. A., Ipatko M. N., Il'in Iu. A., IGNATCHIK V. S., Ignatchik S. Iu.
The method of evaluating the economic efficiency of water supply systems with pumping stations equipped with tanks
Summary
A method of evaluating the economic efficiency of the water supply systems with pumping stations equipped with tanks is presented that provides for optimizing at the design stage water conveying systems in remote areas. These systems are characterized by: low energy efficiency because of the pressure loss during water discharge and low network reliability during bypass operation caused by pressure fluctuation. The method takes into account the specific features of simultaneous operation of two subsystems: pipeline and valving subsystem and booster pumping subsystem. The selection of net discounted flow rate over the life cycle as a uniform optimization criterion for all the subsystems is substantiated. It is stated that the economic and energy efficiency of the investment projects of upgrading water conveying systems is a function of the actual inlet pressure in the supply pipelines and depends on the engineering measures aimed to improve it. These measures include the use of valves for downstream pressure control, mini-hydropower units and auxiliary low head pumping stations. By the example of Parnas booster pumping station in St. Petersburg it is shown that the use of the developed method allows improving the reliability coefficients of the water supply system to P(t) > 0.95 with simultaneous 17% reduction of the net discounted flow rate over the life cycle. In this case depending on the actual inlet water pressure in the supply pipeline the energy consumption of a pumping station is reduced by 22–60%.
Key words
pressure , water supply network , energy efficiency , pumping station , control valve
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UDC 628.214:532.595.2
Primin Oleg
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
pipeline , sewerage , pumping station , water hammer , ecological safety
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UDC 628.292.65.011.4
Ignatchik S. Iu.
Ensuring of Reliability and Power Saving When Designing the Facilities for Wastewater Transporting
SUMMARY
Main propositions of methods of the designing of facilities for wastewater transporting, a collector – aeration station system as an example, at increased discharge of wastewater are considered. The consistency of substantiation of the decision ensuring that the system will guarantee reliable transporting and reduction of operation costs is presented. The numerical evaluation is limited with probabilistic [probability of no-failure operation P(t), intensity of failures λ and repairs μ] and parametric [output Q(t) and power consumption W(t)] indices of the system. The methods of calculation developed make it possible to substantiate technical decisions ensuring the reliability and power saving when reconstructing the facilities for wastewater transporting with due regard for requirements for human environment protection.
Key words
wastewater , reliability , power consumption , operation expenditures , pumping station , pumps characteristics
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UDC 628.15.004.69
Radetskii Mikhail, Davydov A. B., Kolevatov I. A.
Optimization of Operation of a City Water Supply System
Summary
Methods of the optimization of operation of a municipal water supply network of the city of Novosibirsk are presented. A number of variants of installation of reducing valves on different sites of the water supply network at the neighbourhoods Pashino (to itself) and Severny (after itself) of the Kalininsky District of the city are considered in detail. The results of the operation of various pressure regulators and frequency converters used at water supply pumping stations during the last few years are given. As a result of the installation of pressure regulators on sections of the water supply network of the Pashino and Severny neighbourhoods of Novosibirsk the total pumping capacity of stations Drinking Centre and Heat-and-Power Station-4 (HPS-4) has been cut by 10–15% and the pressure at the fourth-stage pumping station (HPS-4) has been reduced by 10 m H2O. At the same time the breakdown rate of the water supply networks of the neighbourhoods has dropped by 10–20%.
Key words
water supply network , pumping station , pressure regulator , frequency converter , excessive head , breakdown rate
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UDC 628.156
Khrenov K. E., Bogomolov M. V., KOZLOV M. N., Shushkevich E. V., Khramenkov S. V., Menshchikova O. A.
Experience of Introduction of Innovation Technique for Prevention of a Water Hammer
Summary
The water hammer is a serious threat to pipeline systems and pumping equipment. This phenomenon constitutes a special hazard to the systems of water supply and sewerage of a big city. Emergencies and interruptions in the operation of water supply and sewerage networks may lead to grave consequences for the whole of municipal services. Examples of such situations making it possible to assess the scales of possible consequences are given. Basic reasons for generation of the water hammer are described; a brief excursus into the history of study of this phenomenon is presented. A considerable part of the article is devoted to measures aimed at prevention of the water hammer in the systems of water supply and sewerage of Moscow and to the use of energy efficient innovation technique.
Key words
pipeline , pumping station , water supply and sewerage networks , water hammer , energy efficient innovation technique
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UDC 628.14:62-531.3
Rakitskii D. S., Nagornyi S. L., Bykova P. G., Erchev V. N., Ageev M. K.
The experience of introducing variable-frequency electric drives of pumping units
Summary
Regulating the rotation speed of pumping unit rotors at the pumping stations of the second and third lift of the Samara pumping-filtration station has been suggested, tried and tested. The introduction of frequency regulation mode of the pumping units operation with the use of variable-frequency electric drives provided for 29.52% reduction of the failure rate of the water mains and distribution networks compared to 2013 and 25.58% reduction compared to 2014; 23% reduction of the power consumption by the pumping units of the second lift pumping station; 15.4% reduction by the pumping units of the third lift pumping station supplying water to the customers. At that the reliability of the water supply system in whole improves owing to the reduction of the network failure rate alongside with the quality of services provided by «Samarskie Kommunal’nye Sistemy» LLC.
Key words
pump , pumping station , frequency-regulated electric drive , frequency converter , power saving
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DOI 10.35776/MNP.2020.04.08
UDC 628.1/.2:621.65:62-531.3
Rybel’ Sergei, Kuninin Vladimir, Gerasimov Semen, Bakushin Andrei
The experience of using variable speed drives at the facilities
of «Vodokanal» LLC
Summary
The experience of using variable speed drives at the pumping stations operated by Vodokanal LLC in Novokuznetsk is presented. The advantages and disadvantages of this technical device are specified. It is demonstrated that currently, the use of variable speed drives provides for reducing the energy consumption by more than 20%, reducing the repair and maintenance costs; for improving the service life of electric motors; for reducing inrush current, water leaks and the load on the pumping equipment and pipeline valving. The use of variable speed drives has paid off even in case where adjusting the parameters to ensure the technology (velocity, performance, etc.); bringing the equipment parameters to the required values without replacing it (in order to increase the equipment load to the nominal value for the subsequent period); compensating for daily irregularities in water consumption are required.
Key words
frequency converter , pumping station , frequency-regulated electric drive , improving energy efficiency , reducing the expenditures
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УДК 621.65:62–531.3:628.1/.2
Nikitin A. M., Balygin A. V., Shustova G. I., Iakovlev I. M.
Особенности частотного регулирования параллельно работающих насосов
Аннотация
Рассматривается один из вариантов энергоэффективной работы насосных агрегатов на насосных станциях водоснабжения и водоотведения при изменении частоты вращения рабочего колеса насоса с помощью частотно-регулируемых электроприводов, наиболее широко применяемых в современных условиях. Частотно-регулируемый электропривод устанавливается один на группу рабочих агрегатов или на каждый насос. Установка частотно-регулируемого электропривода на каждый рабочий агрегат является, на первый взгляд, довольно дорогостоящим мероприятием, поэтому чаще всего устанавливают один электропривод на группу (2–3 шт.) насосов. Однако при этом могут возникать кавитационные процессы, повышаться динамические нагрузки на подшипники и валы насосов, уменьшаться коэффициент полезного действия, и в конечном счете снижаться энергоэффективность работы насосов. По данным теоретического и практического обоснования, при установке частотно-регулируемых электроприводов на каждый рабочий насосный агрегат указанные выше недостатки сглаживаются, а энергоэффективность повышается.
Ключевые слова
pumping station , frequency-regulated electric drive , pumping unit , qualitative method of control , quantitative method of control , lifting efficiency
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УДК 621.65:62-531.3:628.1/.2
Bagaev Iurii, Karpov N. V., Usachev A. P.
Specific features of frequency regulation of parallel pumps
Summary
One of the options of energy efficient operation of pumping units at the water and sewage pumping stations under pump impeller speed variation with the help of variable-speed electric drives widely used at present time is considered. One variable-speed electric drive is installed either for a group of operating units or on a single pump. Installing a variable-speed electric drive on each operating unit at first sight seems to be a very expensive measure; therefore more often one electric drive is installed for a group of pumps (2–3 units). However, in this case cavitation processes can arise, the dynamic loading on the pump shaft and bearings can increase, the lifting efficiency can decrease, and in the long run the pump energy efficiency can drop. The data of the theoretic and practical substantiation show that installing variable-speed electric drives on each operating pumping unit provides for weakening of the above-mentioned shortcomings, whereas the energy efficiency improves.
Key words
energy efficiency , pumping station , frequency regulation , centrifugal pump , pump capacity
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