Failure analysis of the rainwater axial pumps installed in a wastewater pumping station

Muntean, Sebastian; Bosioc, Alin; Marșavina, Liviu; Galatanu, Sergiu Valentin; Drăghici, Ionel; Anton, Liviu Eugen

doi:10.1088/1755-1315/240/3/032022

Cited by 2 publications

(3 citation statements)

References 13 publications

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“…As a result, the procedure described above to ensure a uniform distribution of time operation over all rainwater pumps is limited. However, the distribution of operating time is slightly more uniform when taking into account the first six months of 2018 (Muntean et al, 2019 A view of cumulated operation time in hours from April 2011 to June 2018 on each month is given in Figure 4(a). One can observe that the cumulated operation time larger than the average value of 150 h for all 12 months of an year is yielded during 5 months of the year ( from April to August).…”

Section: Structural Integritymentioning

confidence: 99%

Rainwater propeller pumps structural integrity

Galatanu

Muntean

Marșavina

et al. 2019

IJSI

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Purpose The purpose of this paper is to focus on the structural integrity of the rainwater propeller pumps installed in the municipal wastewater treatment plant (WTP). Design/methodology/approach A numerical analysis is performed to determine the maximum shear stress on the fasten bolts. The rainwater propeller pump is examined in operation at normal conditions and when one blade is progressively blocked. Findings The failure mechanism of the rainwater pump impeller is determined. Research limitations/implications The fibbers and wastes are discharged together with rainwater during storms with these types of pumps to avoid the flood of the WTP. Several catastrophic events have occurred in service due to the fibbers clog the gap between the impeller blades and the pump casing. The clogging process is partially understood so actual technical solutions deal with effects rather the main causes. Practical implications The operation time of all seven rainwater pumps installed in Timisoara’s WTP is investigated. Climate changes in Banat region and new waste properties found in the wastewater require appropriate technical solutions. A technical solution is proposed based on these investigations to extend the operation time and to diminish the operation and maintenance costs. Social implications These large pumps are installed in the urban sewage centralised system implemented in the most cities. The access to the sewerage network is a requirement of any community, regardless of the social status. Originality/value The fracture surfaces of both fastening bolts of the rainwater pump impellers produced in service are examined. As a result, it has been identified that the catastrophic events are due to the brittle fracture of both fasten bolts between the impeller blades and the pump hub, respectively. The catastrophic events of the rainwater propeller pumps are directly correlated to the clog level of the impeller. The numerical simulation is performed to determine the maximum shear stress on the fasten bolts. The case with pump operating at normal conditions is performed identifying its vulnerabilities to clog conditions. Next, one impeller blade is progressively blocked considering three time stop scenarios associated with different clog levels. Conclusively, the operating time of the rainwater pump up to the catastrophic failure is correlated to the clog level of the impeller.

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Section: Structural Integritymentioning

confidence: 99%

Rainwater propeller pumps structural integrity

Galatanu

Muntean

Marșavina

et al. 2019

IJSI

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“…Failure analysis of the rainwater axial pumps installed in a wastewater pumping station are developed to enable service work to be carried out while minimizing unnecessary actions and, at the same time, reducing the risk that it will cause unwanted unforeseen failures [ 20 ]. In addition, device manufacturers are trying to provide better, optimized devices [ 21 , 22 ], ensuring long-term operation and resistance to typical hazards in this work environment [ 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…The literature review shows that even though there are some articles on pumps control and maintenance optimization [ 12 , 17 , 20 ], only a few address the problem of estimating the failure-free time of a pump of the sewage treatment plant by observing the relationship among the data on pump condition and environment and failure-free time. This paper presents an approach to estimating the failure-free time for managers to assist in advance maintenance planning.…”

Section: Introductionmentioning

confidence: 99%

Condition-Based Failure-Free Time Estimation of a Pump

Ćwikła

Paprocka

2023

Sensors

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Reliable and continuous operation of the equipment is expected in the wastewater treatment plant, as any perturbations can lead to environmental pollution and the need to pay penalties. Optimization and minimization of operating costs of the pump station cannot, therefore, lead to a reduction in reliability but rather should be based on preventive works, the necessity of which should be foreseen. The purpose of this paper is to develop an accurate model to predict a pump’s mean time to failure, allowing for rational planning of maintenance. The pumps operate under the supervision of the automatic control system and SCADA, which is the source of historical data on pump operation parameters. This enables the research and development of various methods and algorithms for optimizing service activities. In this case, a multiple linear regression model is developed to describe the impact of historical data on pump operation for pump maintenance. In the literature, the least squares method is used to estimate unknown regression coefficients for this data. The original value of the paper is the application of the genetic algorithm to estimate coefficient values of the multiple linear regression model of failure-free time of the pump. Necessary analysis and simulations are performed on the data collected for submersible pumps in a sewage pumping station. As a result, an improvement in the adequacy of the presented model was identified.

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Failure analysis of the rainwater axial pumps installed in a wastewater pumping station

Cited by 2 publications

References 13 publications

Rainwater propeller pumps structural integrity

Rainwater propeller pumps structural integrity

Condition-Based Failure-Free Time Estimation of a Pump

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