scholarly journals Industrial experiment on electrodialized separation of highly concentrated multicomponent technological solutions at thermal power plants

2019 ◽  
Vol 124 ◽  
pp. 01029
Author(s):  
A. A. Filimonova ◽  
N. D. Chichirova ◽  
A. A. Chichirov ◽  
A. I. Minibaev
Keyword(s):  
Water Treatment ◽  
Anion Exchange ◽  
Power Plants ◽  
Thermal Power ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Wash Water ◽  
Production Cycle ◽  
Thermal Power Plants ◽  
Alkaline Waste

The main sources of highly concentrated multicomponent technological solutions at thermal power plants (TPPs) are water treatment plants. Analysis of operation of the ion-exchange water treatment plant at the Nizhnekamsk Thermal Power Plant-1 showed that half of alkali supplied to regeneration of the anion-exchange alkali filters is not used, but is discharged for neutralization and then to wastewater. Due to the fact that the cost of alkali used in technological processes is quite high, it is economically feasible to process the alkaline waste with the alkali extraction and its reuse in the production cycle. The article presents the experimental results on the electro-membrane separation of alkaline waste regeneration solutions and wash water after anion-exchange filter regeneration. The revealed differences in the selectivity of various ion transfer through the electrodialysis apparatus membranes, depending on time and amount of transmitted electricity, allowed us to establish the possibility of obtaining an alkaline solution purified from impurities.

scholarly journals Research on technological unit of wastewater disposal after regeneration of H-cation exchange filters

2020 ◽  
Vol 216 ◽  
pp. 01083
Author(s):  
Alena Vlasova ◽  
Sergei Vlasov
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Power Plants ◽  
Thermal Power ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Thermal Power Plants ◽  
Wastewater Disposal ◽  
Technological Unit ◽  
Standard Level

АnnotationTechnological installation of waste water disposalafter washing of H-cation filters is quite promising idea of avoiding penalties and reuse of waste water in cycle of thermal power plants (TPP). The development of this unit is based on reactions that occur when mixing several TPP water treatment plant wastes, namely, neutralization and exchange-type reactions. As neutralizing reagent, the sludge of the water treatment plant is used, which consists of CaCO3 by 80%. This method reduces the concentration of sul-phate-containing components in wastewater to a standard level, and also provides neutral wastewater with-out the use of additional purchase reagents.

Improvement of water treatment at thermal power plants

2015 ◽  
Vol 62 (4) ◽  
pp. 286-292 ◽  
Author(s):  
B. M. Larin ◽  
E. N. Bushuev ◽  
A. B. Larin ◽  
E. A. Karpychev ◽  
A. V. Zhadan
Keyword(s):  
Water Treatment ◽  
Power Plants ◽  
Thermal Power ◽  
Thermal Power Plants

scholarly journals Experimental Process Identification for Industrial Water De-carbonization in Power Plants

2013 ◽  
Vol 3 (2) ◽  
pp. 343
Author(s):  
MSc. Lutfi Bina ◽  
Dr.Sc. Mile Stankovski ◽  
Dr.Sc. Goran Stojanovski ◽  
MSc. Dejan Davikovikj ◽  
Gent Bina
Keyword(s):  
Water Treatment ◽  
Power Plants ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Polluted Water ◽  
Process Identification ◽  
Highly Nonlinear ◽  
Negative Effect ◽  
Experimental Process ◽  
Steam Production

Water Treatment Plant (or WTP) is the most important part of the Power Plant, because it produces vital-water it needs for steam production. Power Plants are the biggest air, ground and groundwater pollutants. Bad water quality directly impacts machine duration. Polluted water from Water Treatment Plant has a negative effect on people, flora and fauna, thus better waste management programs should be put in place to eliminate this problem. In this paper we are going to present the de-carbonization process of raw water as a part of water treatment plant, within coal fired power plants. De-carbonizing water is a time consuming process. We are going to present an advanced method for process identification with big time delay. The results are compared and one of the most appropriate methods is selected as identification method for this process. Further research and possibilities in this area are going to be presented by the end of the paper.Progress in identifying the process by which we work in this paper may serve as a new way to identify highly nonlinear processes. The used algorithm for identification of the process that is outlined in this paper can be applied, and it will be the basis for the creation of the software for the application of microcomputer techniques. Here we are applying the relevant software which can be applied in the form of programming packages for identification. This has to do with passive identification methods.

scholarly journals Influence of the hydrodynamic efforts on the efficiency of the regeneration of the granular filtering material in a water treatment plant

2021 ◽  
Author(s):  
Taofic Bacharou ◽  
Chabi Noël Worou ◽  
Jesugnon Ezéchias Kanho ◽  
Razack L. Guene
Keyword(s):  
Water Treatment ◽  
Treatment Plant ◽  
Poor Performance ◽  
Water Treatment Plant ◽  
Filter Material ◽  
Ultrasonic Waves ◽  
Wash Water ◽  
Shear Stresses ◽  
Nominal Capacity ◽  
Hydraulic Load

Abstract This article aims to study the hydrodynamic conditions of the parameters that influence the removal of dirt particles and aggregates by the drainage of wash water into filter materials for better regeneration efficiency. The water treatment plant with a nominal capacity of 600 m3·h−1 is located in the city of Parakou in Benin. It appears that one of the causes of the poor performance of the methods used for water treatment is the insufficient value of the shear stresses of the movement created by the flow of washing water in the filter bed. The use of hydro-elevators and hydrocyclones for the removal of particles from the surface of the grains of the filtering material under hydraulic load makes it possible to reduce the quantity of remaining pollution respectively by 1.5 to 2.5 times compared with the combined washing of water and air. To this end, the performance of grain washing in the hydrocyclone is explained by the presence of centrifugal field, self-separation and the friction of the particles between them and on the wall of the apparatus. The regeneration of the filter material under the action of ultrasonic waves reduces the remainder of particles compared to washing with water and air about 6 times.

scholarly journals Calculated dependence of determination of actual dose of microsand and influence of its value on efficiency of coagulation process in Actiflo clarifier

Vestnik IGEU ◽  
2021 ◽  
pp. 5-12
Author(s):  
E.A. Karpychev
Keyword(s):  
Quantitative Analysis ◽  
Water Treatment ◽  
Thermal Power ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Wastewater Sludge ◽  
Coagulation Process ◽  
Water Cleaning ◽  
Operational Test ◽  
The Impact

Operational test of the preliminary water cleaning systems is the first and most critical stage when putting into pilot operation a water treatment plant at a thermal power plant (TPP). We have sufficient experience of equipment setting up and operating when most traditional devices of preliminary water purification are used. Also, the main stages and features of the work carried out are known, and a sufficient amount of methodological literature has been published, compared to employment of modern and promising devices. These devices include Actiflo clarifiers. The main feature of the Actiflo technology is introduction of microsand into the stream of treated water. It forms the so-called “centers” of coagulation and is used to make wastewater sludge heavier. The development of a methodology to assess the impact of the actual dose of microsand on the water clarification process will contribute to the solution of the priority task of adapting the promising Actiflo technology for water treatment systems of TPPs. In laboratory studies, the method of pilot coagulation has been used. It allows us to assess the efficiency of coagulation process using generally accepted methods of quantitative analysis of indicators of natural water quality. In subsequent industrial tests, along with the quantitative analysis of water, the actual value of the microsand dose has been assessed using measurements of the proportions of separate fractions in the formed sand-sludge pulp. The results of laboratory and industrial studies of “cold” coagulation process of the Kama River water using Actiflo clarifiers have been obtained. The dependence of efficiency effect of water clarification on the dose of coagulant and the dose of microsand has been determined. To check and maintain the operating mode of the clarifier, a method to assess the actual values of the microsand dose has been developed and proposed. The research results are applicable for low-turbidity colored surface water sources. The results of operating tests of Actiflo clarifiers can be used as practical examples for coagulating water in devices similar in design, for example, VTI-M clarifiers. The proposed method to assess the actual dose of microsand can be used as a technological parameter during the development of the parameter tables when Actiflo clarifiers are used.

scholarly journals Wet flue gas desulfurization wastewater treatment with reclaimed water treatment plant sludge: a case study

2018 ◽  
Vol 78 (11) ◽  
pp. 2392-2403 ◽  
Author(s):  
Hong Chen ◽  
Yiyu Wang ◽  
Yanxiao Wei ◽  
Liang Peng ◽  
Bo Jiang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
Flue Gas ◽  
Thermal Power ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Flue Gas Desulfurization ◽  
Hunan Province ◽  
Wastewater Treatment Process ◽  
Water Treatment Plant Sludge

Abstract To upgrade a wet flue gas desulfurization (FGD) wastewater treatment process in a typical thermal power plant (TPP) in Hunan province, China, a new concept for reusing polyaluminum chloride (PAC)-based water treatment plant sludge (WTPS) as a coagulant is proposed. Results show that, for an optimal WTPS dosage of 1,000 mg/L, the corresponding removal capacities for suspended solids (SS) and chemical oxygen demand (COD) from the practical FGD wastewater were 58.3% and 40.3%, respectively. Through an advanced treatment with a dosage of 50 mg/L of PAC, pH of 9, and stirring of 150 r/min for 60 s and 50 r/min for 15 min, the total removal efficiencies of SS, COD, and total cadmium (Cd) from the FGD wastewater were 93.7%, 88.8%, and 84.6%, respectively. Therefore, a new modification process (that involves mixing with WTPS – slag cleaner – neutralization – coagulation – sedimentation) was proposed. The proposed process is economically superior, and the average cost for the FGD wastewater treatment was only 1.08 USD/t. This could provide a cost-effective alternative process for upgrading FGD wastewater treatment facilities of TPPs.

scholarly journals Research and results of mathematical modeling of block ion-exchange water treatment plants operating modes and regeneration

2022 ◽  
Vol 2150 (1) ◽  
pp. 012002
Author(s):  
A A Chichirov ◽  
A A Filimonova ◽  
N D Chichirova ◽  
O E Babikov
Keyword(s):  
Mathematical Modeling ◽  
Water Treatment ◽  
Ion Exchange ◽  
Power Plants ◽  
Filter Design ◽  
Thermal Power ◽  
Treatment Plant ◽  
Maximum Output ◽  
Solution Flow ◽  
Hydrodynamic Mode

Abstract The problem of water treatment at thermal power plants using ion-exchange technologies is a multi-parameter task. Mathematical modeling is essential for research and optimization of ion exchange technology. The analysis of hydrodynamic processes during the operation of ion-exchange filters was carried out according to the developed mathematical model. Also, a physicochemical analysis of the composition of the water treatment plant solutions under real conditions was carried out. It is shown that in the cationite and anionite filters, the flow movement occurs mainly in a mixed hydrodynamic mode. This mode of regeneration and the filter design do not allow achieving the minimum consumption of the reagent for regeneration, the minimum volume of wastewater and the maximum output of demineralized water. The mixed mode of the anion exchange filter operation allows division of the outgoing solution flow into fractions, which can be successfully used in the TPP water cycle.

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