Improving of the water preparation systems in the industry thermal power plants

Choshnova, Daniela

doi:10.1051/matecconf/201814505016

Cited by 3 publications

(2 citation statements)

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“…Compliance with the water regime is one of the key tasks to ensure reliable and safe operation of energy complexes. The service life of all equipment depends on the purity of the coolant, even small deviations from the norms can lead to increased corrosion, deterioration of heat transfer and premature failure [1][2].…”

Section: Introductionmentioning

confidence: 99%

Software implementation of calculation of technical characteristics of water treatmentsystemsin power engineering

Pivovarova¹,

Матвеев²,

Pevneva³

2022

Proceedings of the v International Workshop on Modeling, Information Processing and Computing (MIP: Computing-v 2022)

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The paper proposes a developed software application for automating the calculation of the technical characteristics of continuous ionites units with a fluidized ionite bed used in the water treatment system of the energy complex. The program is designed to calculate the structural and hydraulic parameters of an ion-exchange parallel-point filter used in water softening and demineralization schemes at water treatment facilities of heat power facilities. The necessary initial data, formulas are given, on the basis of which the algorithm is compiled, logical structures are developed and a software solution is obtained. The importance of work on ensuring high quality of water heat carriers for ensuring long-term and uninterrupted operation of the energy complex from the point of view of technogenic safety, as well as reducing capital and operating costs is shown. The possibility of using the developed software application in training specialists, as well as directly in working conditions, is described.

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Section: Introductionmentioning

confidence: 99%

Software implementation of calculation of technical characteristics of water treatmentsystemsin power engineering

Pivovarova¹,

Матвеев²,

Pevneva³

2022

Proceedings of the v International Workshop on Modeling, Information Processing and Computing (MIP: Computing-v 2022)

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“…The primary goal of the pre-treatment stage is to reduce the levels of total dissolved solids, silt density index, and turbidity of the feed water to have an efficient process with a high-quality permeate that meets the acceptable level of the feed for the following treatment step [3]. Water quality requirements are stringent; therefore, the water treatment process for thermal power plants is very significant in meeting these requirements, especially from an environmental point of view [4,5]. Environmental trouble is associated with the chemicals used in the pre-treatment stage and the others used for membrane cleaning.…”

Section: Introductionmentioning

confidence: 99%

The Role of Coagulation and Microfiltration in Seawater Pre-treatment

Shaheen

Cséfalvay

2022

Period. Polytech. Chem. Eng.

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Power industry needs make-up water in power plant processes to compensate for the constant water loss during work. Mediterranean Seawater samples are studied to obtain pretreated water to use as a feed for the desalination stage. A comparison of coagulation with two coagulants, namely Poly aluminum chloride and ferric chloride in a one wt% stock solution, followed by microfiltration, was evaluated to obtain an efficient pre-treatment method. The lowest dosage of PACl positively affected all the measured parameters, especially the total suspended solid content was reduced to below 10 mg/L. The addition of FeCl3 resulted in 2.5-times higher total suspended solid content (23.5±4.58 mg/L) than the initial value measured for seawater (10.8±1.03 mg/L). Considering the flux values, two-steps of microfiltration and the lowest dosage of PACl followed by microfiltration resulted in the same high flux (3500 L /(m2 h) at the initial stage and 2500 L/(m2 h) at the 90% recovery rate). The flux after FeCl3 dosage seemed to be the highest, but it should be emphasized that the flocs were filtered via two consecutive 5–13 μm microfiltration stages, so this flux is not entirely comparable with those measured in other cases. Considering the chloride concentration, after microfiltration without coagulation, it remained constant; using coagulants it showed a slight reduction (~4%). From environmental point of view, the two-steps of microfiltration is recommended to be used since no chemicals are required for the operation; it can provide a steady flux of the cleanest pretreated water based on total suspended solid content.

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Investigation of coagulation and microfiltration for Danube water as the first step of make-up water production

Shaheen¹,

Cséfalvay²

2023

Chem. Pap.

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A comparison of coagulation with two coagulants, poly-aluminum chloride (PACl) and ferric chloride (FeCl3), followed by microfiltration, was evaluated to obtain a better coagulant for an efficient pretreatment method for make-up water preparation from Danube water for thermal power plants. Efficiency was determined by chloride concentration and retention based on the total suspended solid content of the treated water samples. Results were compared to microfiltration working alone as a chemical-free pretreatment. Addition of PACl resulted in the lowest total suspended solid content (18.0 ± 1.3 mg/L), slightly lower than obtained for microfiltration alone (19.6 ± 2.5 mg/L) and significantly lower than for FeCl3 (25.0 ± 3.3 mg/L). Regarding the retention values, coagulation with PACl followed by microfiltration, microfiltration working alone and coagulation with FeCl3 followed by microfiltration represented retention values of 68%, 66.21%, and 56.89%, respectively. Considering the chloride concentration, it remained constant after microfiltration alone; meanwhile, adding coagulants showed a significant rise, ~ 6.4- and 5.7-times higher than the raw water's value after adding FeCl3 and PACl, respectively. From environmental viewpoint, microfiltration alone is recommended because it can provide a steady flux and low total suspended solid content without additional load of chloride ion which shall be eliminated in the further desalination step.

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Improving of the water preparation systems in the industry thermal power plants

Cited by 3 publications

References 0 publications

Software implementation of calculation of technical characteristics of water treatmentsystemsin power engineering

Software implementation of calculation of technical characteristics of water treatmentsystemsin power engineering

The Role of Coagulation and Microfiltration in Seawater Pre-treatment

Investigation of coagulation and microfiltration for Danube water as the first step of make-up water production

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