Water Recycling – Industrial Applications

1982 ◽  
Vol 14 (9-11) ◽  
pp. 1431-1445
Author(s):  
D R Albrecht ◽  
K R Imhoff
Keyword(s):  
Coal Mining ◽  
Power Plants ◽  
Steel Production ◽  
Industrial Applications ◽  
Water Recycling ◽  
Industrial Water ◽  
Paper Mills ◽  
Paper Production ◽  
Metal Finishing ◽  
Recycling Techniques

The application of industrial water recycling techniques is demonstrated by examples of various industrial branches such as: steel production, pickling and plating, coal mining and coking, sulphite cellulose and paper production, sugar works, and power plants. Special consideration is given to water recycling in metal finishing works and paper mills.

Preparation and Application of Double-Hydrophilic Copolymer as Scale and Corrosion Inhibitor for Industrial Water Recycling

2017 ◽  
Vol 54 (6) ◽  
pp. 467-478
Author(s):  
Tiantian Wang ◽  
Yuming Zhou ◽  
Qingzhao Yao ◽  
Ao Zhang ◽  
Jun Li ◽  
...  
Keyword(s):  
Corrosion Inhibitor ◽  
Water Recycling ◽  
Industrial Water

scholarly journals Negotiating Industrial Heritage and Regional Identity in Three Australian Regions

2017 ◽  
Vol 39 (4) ◽  
pp. 44-64
Author(s):  
Erik Eklund
Keyword(s):  
Coal Mining ◽  
Steel Production ◽  
Regional Identity ◽  
Electricity Production ◽  
Industrial Heritage ◽  
Production Region ◽  
Postindustrial City ◽  
South Wales ◽  
The Relationship ◽  
The Town

This article investigates the relationship between industrial heritage and regional identity during deindustrialization in three Australian regions. Newcastle, in the state of New South Wales (NSW), was a coal-mining and steel-production center located north of Sydney. Wollongong, also in NSW, was a coal-mining and steel-production region centered around Port Kembla, near the town of Wollongong. The Latrobe Valley was a brown coal-mining and electricity-production center east of Melbourne. All regions display a limited profile for industrial heritage within their formal policies and representations. In Newcastle and Wollongong, the adoption of the language of the postindustrial city has limited acknowledgement of the industrial past, while the Latrobe Valley’s industrial heritage is increasingly framed by concerns over current economic challenges and climate change.

scholarly journals Sustainable Coal Mining and Electricity Generation: With Special Reference to Dahanu Thermal Power Station

2020 ◽  
Vol Special Issue (1) ◽  
Author(s):  
Sugat Tajane ◽  
Manika Kamthan
Keyword(s):  
Coal Mining ◽  
Thermal Power Station ◽  
Power Plants ◽  
Thermal Power ◽  
Mining Industry ◽  
Resource Exploitation ◽  
Power Station ◽  
Mining Operations ◽  
Environment And Health ◽  
Mineral Development

Mining Industry is often tagged as a polluting sector since it involves since it involves extensive resource exploitation by unsustainable methods. The techniques involved in mining cause tremendous destruction to the environment and health of people living in nearby areas. There is a growing consensus on sustainable and efficient mineral development which will avoid the clash between economic and environmental interests. Deployment of advanced and sustainable technological solutions in the entire mining process, fixing the gaps in its regulatory mechanisms and learning from the successes of specific domestic and international mining operations are certain solutions that have the capacity this sector more productive. The paper provides insights into the problems of mining sector and possible solutions to overcome these problems. It also provides examples of certain best practices adopted by mining corporations for sustainable coal mining. The paper also explores various methods and technologies which can be adopted by Thermal Power Plants to reduce their emissions and simultaneously conserve environment. An empirical study of Dahanu Thermal Power Station located in state of Maharashtra of India has been undertaken for this purpose to study the modern technologies adopted by them to lower their emission levels.

scholarly journals Coal Mine Methane Utilization in Gas Turbine Units for Electricity and Heat Production

2015 ◽  
Vol 4 (5) ◽  
pp. 41-48 ◽  
Author(s):  
Кулаков ◽  
D. Kulakov ◽  
Щёголев ◽  
N. Shchegolev ◽  
Тумашев ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Coal Mining ◽  
Coal Mine ◽  
Power Plants ◽  
Negative Impact ◽  
Inlet Temperature ◽  
Ecological Situation ◽  
Modern Approach ◽  
Coal Mine Methane ◽  
Wide Range

Coal mining is accompanied by the release of coal mine methane. Its emissions into the atmosphere within methane-air mixture have a negative impact on the ecological situation. The modern approach involves the use of methane-air-mixture for heat boilers or units to generate electricity. For the generation of heat and electrical energy the coal mine methane could be used in cogeneration gas turbine plants with an altered sequence of processes. Thermo — and gas dynamics studies were conducted in a wide range of parameters of gas turbine plants. For small power plants recommended are: 2.8 compression ratio, turbine inlet — 1173 K, gas cooler inlet temperature — 303 K, 0.8 regeneration ratio. In this case the electrical efficiency of gas turbine plant is 25–26% and even 63–64% if produced heat is counted. Cogeneration gas turbine plant with an altered sequence of process has smaller capital and operating costs compared to traditional gas turbine unit. The use of methane-air mixture as fuel in such gas turbine units increases the profitability of coal mining and improves the ecological situation in the region.

Development of a Phase-field Method for Phase Change Simulations Using a Conservative Allen-cahn Equation

2021 ◽  
Author(s):  
Akinori Tamura ◽  
Kenichi Katono
Keyword(s):  
Phase Change ◽  
Phase Field ◽  
Computational Efficiency ◽  
Power Plants ◽  
Field Method ◽  
Industrial Applications ◽  
Phase Field Method ◽  
Benchmark Problems ◽  
Two Phase ◽  
Cahn Equation

Abstract Two-phase flows including a phase change such as liquid-vapor flows play an important role in many industrial applications. A deeper understanding of the phase change phenomena is required to improve performance and safety of nuclear power plants. For this purpose, we developed a phase change simulation method based on the phase field method (PFM). Low computational efficiency of the conventional PFM based on the Cahn-Hilliard equation is an obstacle in practical simulations. To resolve this problem, we presented a new PFM based on the conservative Allen-Cahn equation including a phase change model. The wettability also needs to be considered in the phase change simulation. When we apply the conventional wetting boundary condition to the conservative Allen-Cahn equation, there is a problem that the mass of each phase is not conserved on the boundary. To resolve this issue, we developed the mass correction method which enables mass conservation in the wetting boundary. The proposed PFM was validated in benchmark problems. The results agreed well with the theoretical solution and other simulation results, and we confirmed that this PFM is applicable to the two-phase flow simulation including the phase change. We also investigated the computational efficiency of the PFM. In a comparison with the conventional PFM, we found that our proposed PFM was more than 100 times faster. Since computational efficiency is an important factor in practical simulations, the proposed PFM will be preferable in many industrial simulations.

scholarly journals Realizing a Novel Friction Stir Processing-Enabled FWTPET Process for Strength Enhancement Using Firefly and PSO Methods

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 728
Author(s):  
Senthil Kumaran S ◽  
Jayakumar Kaliappan ◽  
Kathiravan Srinivasan ◽  
Yuh-Chung Hu ◽  
Sanjeevikumar Padmanaban ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Process Parameters ◽  
Friction Stir Processing ◽  
Power Plants ◽  
Weld Zone ◽  
Industrial Applications ◽  
Tube Plate ◽  
Friction Stir ◽  
Input And Output ◽  
Experimental Values

The friction welding of tube to tube plate using an external tool (FWTPET) is widely deployed in several industrial applications, such as aerospace, automotive, and power plants. Moreover, for achieving a better tensile strength and hardness in the weld zone, the friction stir processing (FSP) technique was incorporated into the FWTPET process for joining aluminum alloys (AA6063 tube, AA6061 tube plate). Furthermore, it has to be noted that FWTPET was applied for joining the AA6063 tube to the AA6061 tube plate, and FSP was deployed for reinforcing the weld zone with carbon nanotube (CNT) and silicon nitride (Si3N4) particles, thereby attaining the desirable mechanical properties. Subsequently, the Taguchi L25 orthogonal array was used for identifying the most influential input and output FWTPET + FSP process parameters. Furthermore, particle swarm optimization (PSO) and the firefly algorithm (FFA) were deployed for determining the optimized input and output FWTPET + FSP process parameters. The input process parameters include CNT, Si3N4, rotational tool speed, and depth. Furthermore, the tensile strength of the welded joint was considered as the output process parameter. The process parameters predicted by PSO and FFA were compared with the experimental values. It was witnessed that deviation between the predicted and experimental values was minimal. Moreover, it was found that FFA provided a superior tensile strength prediction than PSO.

scholarly journals Remaining Useful Life Prediction Techniques of Electric Valves for Nuclear Power Plants with Convolution Kernel and LSTM

2020 ◽  
Vol 2020 ◽  
pp. 1-13 ◽  
Author(s):  
Hang Wang ◽  
Min-jun Peng ◽  
Yong-kuo Liu ◽  
Shi-wen Liu ◽  
Ren-yi Xu ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Sequential Analysis ◽  
Industrial Applications ◽  
Remaining Useful Life ◽  
Convolution Kernel ◽  
Acoustic Emission Sensors ◽  
Useful Life ◽  
Prediction Techniques

Electric valves have significant importance in industrial applications, especially in nuclear power plants. Keeping in view the quantity and criticality of valves in any plant, it is necessary to analyze the degradation of electric valves. However, it is difficult to inspect each valve in conventional maintenance. Keeping in view the quantity and criticality of valves in any plant, it is necessary to analyze the degradation of electric valves. Thus, there exists a genuine demand for remote sensing of a valve condition through nonintrusive methods as well as prediction of its remaining useful life (RUL). In this paper, typical aging modes have been summarized. The data for sensing valve conditions were gathered during aging experiments through acoustic emission sensors. During data processing, convolution kernel integrated with LSTM is utilized for feature extraction. Subsequently, LSTM which has an excellent ability in sequential analysis is used for predicting RUL. Experiments show that the proposed method could predict RUL more accurately compared to other typical machine learning and deep learning methods. This will further enhance maintenance efficiency of any plant.

scholarly journals Influence of Gaseous Hydrogen Addition on Initiation of Rotating Detonation in Liquid Fuel–Air Mixtures

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5101
Author(s):  
Jan Kindracki ◽  
Krzysztof Wacko ◽  
Przemysław Woźniak ◽  
Stanisław Siatkowski ◽  
Łukasz Mężyk
Keyword(s):  
Liquid Fuel ◽  
Power Plants ◽  
Electrical Energy ◽  
Industrial Applications ◽  
Gaseous Hydrogen ◽  
Hydrogen Addition ◽  
Detonation Combustion ◽  
Detonation Process ◽  
Continuous Work ◽  
Rotating Detonation

Hydrogen is the most common molecule in the universe. It is an excellent fuel for thermal engines: piston, turbojet, rocket, and, going forward, in thermonuclear power plants. Hydrogen is currently used across a range of industrial applications including propulsion systems, e.g., cars and rockets. One obstacle to expanding hydrogen use, especially in the transportation sector, is its low density. This paper explores hydrogen as an addition to liquid fuel in the detonation chamber to generate thermal energy for potential use in transportation and generation of electrical energy. Experiments with liquid kerosene, hexane, and ethanol with the addition of gaseous hydrogen were conducted in a modern rotating detonation chamber. Detonation combustion delivers greater thermal efficiency and reduced NOx emission. Since detonation propagates about three orders of magnitude faster than deflagration, the injection, evaporation, and mixing with air must be almost instantaneous. Hydrogen addition helps initiate the detonation process and sustain continuous work of the chamber. The presented work proves that the addition of gaseous hydrogen to a liquid fuel–air mixture is well suited to the rotating detonation process, making combustion more effective and environmentally friendly.

scholarly journals About Improving Collection Efficiency for Industrial Plate-Type Electrostatic Precipitator

2013 ◽  
Vol 8-9 ◽  
pp. 165-174
Author(s):  
Gabriel Nicolae Popa
Keyword(s):  
Power Plants ◽  
Electrostatic Precipitator ◽  
Collection Efficiency ◽  
Industrial Applications ◽  
Power Supplies ◽  
Dust Particles ◽  
Special Power ◽  
Thermoelectric Power Plants ◽  
Plate Type ◽  
Frequency Power

Plate-type electrostatic precipitators are the largest and most used industrial dusts control, most applications are in the production of electricity (thermoelectric power plants). In many industrial applications, plate-type precipitators have three sections and silicon-controlled rectifier power supplies type. Although, the collection efficiency obtained by these type of precipitators are more than 95%, most of the dust particles with diameter less than 10 μm remain un-collected. To improve the collection efficiency different electrical and/or mechanical options can be used. To improve the collection efficiency of industrial plate-type precipitators, the paper presents two practical options. The first solution would be replacing the power supplies silicon-controlled rectifier - with other special power supplies (intermittent power supplies, high frequency power supplies) depending on the dust resistivity; the second solution would be to add a new section at precipitator an expensive solution, usually the last. The technological and electrical sizes, simulated and measured, are presented for the proposed solutions.

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