scholarly journals THE USE OF CATALYTIC NEUTRALIZATION FOR THE PURIFICATION OF EXHAUST GASES FROM MARINE POWER PLANTS IN AN AGGRESSIVE ENVIRONMENT

2020 ◽  
pp. 157-166
Author(s):  
Nina N. Gorlova
Keyword(s):  
Power Plants ◽  
Material Selection ◽  
Point Of View ◽  
Quantitative Composition ◽  
Qualitative And Quantitative ◽  
Aggressive Environment ◽  
Catalytic Material ◽  
The Cost ◽  
Selection Of

    Among the methods used, the most effective, from the point of view of the quality of cleaning from the main harmful substances, is catalytic neutralization. The effectiveness of using this method is largely determined by the properties and characteristics of the used catalytic material. Selection of the appropriate composition determines the provision of physical, physico-mechanical and corrosive properties of the used catalytic materials. In this regard, the possibilities of using steel oxide and molding clay as basic components in the charge of the material were studied. In order to reduce the cost of the treatment system, the possibility of replacing valuable expensive components with ore mills of the appropriate composition was considered.As a result of the studies, the optimal qualitative and quantitative composition of the charge of the catalytic material was determined.

METHODS OF WATER PURIFICATION AT THE STAGE OF WATER TREATMENT FOR FEEDING BOILERS AND THEIR OWN TECHNOLOGICAL NEEDS AT THE PLANT CHPP

2021 ◽  
Vol 3 (1) ◽  
pp. 099-103
Author(s):  
M. V. Vasina ◽  
◽  
A. S. GOLYSH ◽  
K. V. TROFIMENKO ◽  
◽  
...  
Keyword(s):  
Water Treatment ◽  
Water Purification ◽  
Quantitative Composition ◽  
Source Water ◽  
Initial Water ◽  
Qualitative And Quantitative ◽  
Pre Treatment ◽  
The Cost ◽  
Selection Of

This work consists of the characteristics of production, assessment of the qualitative and quantitative composition of water, consideration of the process of water purification in the chemical shop, comparison and selection of coagulants and flocculants, and demonstration of the most affordable technology used at the CHPP which increases the efficiency of source water purification. The problem of pretreatment of the source water has always been relevant. The quality of the water used depends on the operation of boilers and turbines at the CHPP. The paper presents the average annual indicators of the quality of the source water, pre-treatment methods, and considers which reagents that do not require the cost of reconstruction of clarifiers can improve their performance. The initial water after the application of the test samples of coagulants and flocculants was studied. Conclusions are drawn about the work of clarifiers after the use of the proposed reagents.

scholarly journals THE EFFECT OF MARINE POWER PLANTS EXHAUST GASES TEMPERATURE ON THE QUALITY OF THEIR CLEANING USING THE CATALYTIC NEUTRALIZATION METHOD

2020 ◽  
pp. 167-174
Author(s):  
Gennady V. Medvedev ◽  
Mikhail Y. Khramov
Keyword(s):  
Power Plants ◽  
Negative Impact ◽  
Catalytic Converter ◽  
Quantitative Composition ◽  
Exhaust Gases ◽  
Environmental Objects ◽  
Catalytic Material ◽  
Harmful Emissions ◽  
Degree Of Purification

The use of catalytic neutralization for the purification of harmful emissions from ship power plants can significantly reduce the negative impact of exhaust gases on all environmental objects. The attractiveness of the proposed method lies in the possibility of selecting the appropriate composition of the catalytic material depending on the required degree of purification.The functional properties of catalytic materials are largely determined by the qualitative and quantitative composition of the material used, as well as the conditions of its operation - the temperature regime.In order to determine the acceptable composition of the catalytic converter material, we made an analyses of materials of various compositions. The optimum degree of purification was achieved on materials containing valuable components (rhodium, iridium, palladium). However, the issue of reducing the treatment system cost is important. So, the possibility of replacing such metals with ore grindings (bastnesite, loparite) has been studied in the paper.

COMBINATORIAL POLYNOMIALLY COMPUTABLE CHARACTERISTICS OF SUBSTITUTIONS AND THEIR PROPERTIES

2020 ◽  
Vol 7 (2) ◽  
pp. 34-41
Author(s):  
VLADIMIR NIKONOV ◽  
◽  
ANTON ZOBOV ◽  
Keyword(s):  
Mathematical Expectation ◽  
Point Of View ◽  
Small Range ◽  
Computational Point ◽  
Wide Range ◽  
Bijective Function ◽  
The Difference ◽  
Element Base ◽  
Selection Of

The construction and selection of a suitable bijective function, that is, substitution, is now becoming an important applied task, particularly for building block encryption systems. Many articles have suggested using different approaches to determining the quality of substitution, but most of them are highly computationally complex. The solution of this problem will significantly expand the range of methods for constructing and analyzing scheme in information protection systems. The purpose of research is to find easily measurable characteristics of substitutions, allowing to evaluate their quality, and also measures of the proximity of a particular substitutions to a random one, or its distance from it. For this purpose, several characteristics were proposed in this work: difference and polynomial, and their mathematical expectation was found, as well as variance for the difference characteristic. This allows us to make a conclusion about its quality by comparing the result of calculating the characteristic for a particular substitution with the calculated mathematical expectation. From a computational point of view, the thesises of the article are of exceptional interest due to the simplicity of the algorithm for quantifying the quality of bijective function substitutions. By its nature, the operation of calculating the difference characteristic carries out a simple summation of integer terms in a fixed and small range. Such an operation, both in the modern and in the prospective element base, is embedded in the logic of a wide range of functional elements, especially when implementing computational actions in the optical range, or on other carriers related to the field of nanotechnology.

scholarly journals Unstable Hemostasis and Specific Postoperative Complications (Literature Review)

2020 ◽  
Vol 5 (4) ◽  
pp. 98-102
Author(s):  
D. V. Lebedeva ◽  
E. A. Ilyicheva
Keyword(s):  
Postoperative Complications ◽  
Rapid Development ◽  
Point Of View ◽  
The Body ◽  
Cost Of Treatment ◽  
Duration Of Hospital Stay ◽  
Technical Errors ◽  
Perioperative Bleeding ◽  
The Cost

Perioperative bleeding occupies a leading place among all surgical complications and, despite the rapid development of surgery, remains relevant to this day. In addition to an increase in mortality, bleeding can cause the development of other postoperative complications, which lead to disability of patients and to a decrease in the quality of life in all age groups. Most perioperative bleeding are caused by technical errors. This article reviews the problem of perioperative bleeding from the point of view of impaired coagulation capabilities of the body. The main etiopathogenetic features of hemostasis during the development of this complication are considered. The analysis of postoperative complications, which were directly or indirectly caused by bleeding during or after surgery, is presented. The prevalence of these complications in various areas of surgery has been demonstrated. More detailed study of the hemostasis system and the identification of predictors of hemostasis difficulties before the surgery may cause an improvement in the results of surgical treatment and reduce the number of postoperative complications and the duration of hospital stay. Accordingly, this will lead to a decrease in the cost of treatment and an increase in patient satisfaction with the medical care. In connection with the above, there is a great interest among surgeons and anesthesiologists in preventing the development of perioperative bleeding.

scholarly journals 2.2. FORMATION OF AN INFORMATION AND ANALYTICAL ACCOUNTING SYSTEM FROM THE POINT OF VIEW OF ACCOUNTING REPORTING QUALITY

2021 ◽  
pp. 33-36
Author(s):  
Е.Х. Абу
Keyword(s):  
Accounting Information ◽  
Reporting Quality ◽  
Financial Statements ◽  
Point Of View ◽  
Accounting System ◽  
System Quality ◽  
Accounting Information Systems ◽  
Information Product ◽  
Selection Of

В статье определены подходы к выделению учетных объектов в системе качества информационного продукта; выделены основные преимущества использования информационных технологий в информационных системах бухгалтерского; определены направления формирования бухгалтерской информационно-аналитической учетной системы с позиции качества бухгалтерской отчетности. На практике активно применяется концепция реинжиниринга бизнес-процессов, которая позволяет значительно улучшить результативность и отдачу системы бухгалтерского учета. Кардинальная перестройка системы бухгалтерского учета позволяет формировать информацию, на основе которой образуются положительные эффекты в производственном управлении. Область охвата положительных эффектов зависит от радикальности, стоимости и качества выполненных преобразований учетной системы через пользование реинжиниринговыми услугами. Исследования показывают, что одной из важнейших черт описанного подхода к системе бухгалтерского учета является выражение цели функционирования учетной системы через получение конкретного учетного информационного продукта. In the article the approaches to the selection of account objects in the system quality of an information product; the main benefits of using information technology in accounting information systems; determined the directions of formation of accounting information and analytical accounting system in terms of quality of financial statements.

scholarly journals Thermo-economic comparative analysis of gas turbine GT10 integrated with air and steam bottoming cycle

2014 ◽  
Vol 35 (4) ◽  
pp. 83-95 ◽  
Author(s):  
Daniel Czaja ◽  
Tadeusz Chmielnak ◽  
Sebastian Lepszy
Keyword(s):  
Economic Analysis ◽  
Gas Turbine ◽  
Power Plants ◽  
Combined Cycle ◽  
Small Range ◽  
Exhaust Gas ◽  
Thermodynamic Optimization ◽  
Technological Structure ◽  
The Cost ◽  
Selection Of

Abstract A thermodynamic and economic analysis of a GT10 gas turbine integrated with the air bottoming cycle is presented. The results are compared to commercially available combined cycle power plants based on the same gas turbine. The systems under analysis have a better chance of competing with steam bottoming cycle configurations in a small range of the power output capacity. The aim of the calculations is to determine the final cost of electricity generated by the gas turbine air bottoming cycle based on a 25 MW GT10 gas turbine with the exhaust gas mass flow rate of about 80 kg/s. The article shows the results of thermodynamic optimization of the selection of the technological structure of gas turbine air bottoming cycle and of a comparative economic analysis. Quantities are determined that have a decisive impact on the considered units profitability and competitiveness compared to the popular technology based on the steam bottoming cycle. The ultimate quantity that can be compared in the calculations is the cost of 1 MWh of electricity. It should be noted that the systems analyzed herein are power plants where electricity is the only generated product. The performed calculations do not take account of any other (potential) revenues from the sale of energy origin certificates. Keywords: Gas turbine air bottoming cycle, Air bottoming cycle, Gas turbine, GT10

Application of Variational Geometry to the Analysis of Mechanical Tolerances

1989 ◽  
Author(s):  
P. M. Martino ◽  
G. A. Gabriele
Keyword(s):  
Mechanical Design ◽  
Worst Case Analysis ◽  
Prototype System ◽  
Tolerance Design ◽  
Worst Case ◽  
Geometric Tolerances ◽  
Solid Models ◽  
The Cost ◽  
Selection Of

Abstract The proper selection of tolerances is an important part of mechanical design that can have a significant impact on the cost and quality of the final product. Yet, despite their importance, current techniques for tolerance design are rather primitive and often based on experience and trial and error. Better tolerance design methods have been proposed but are seldom used because of the difficulty in formulating the necessary design equations for practical problems. In this paper we propose a technique for the automatic formulation of the design equations, or design functions, which is based on the use of solid models and variational geometry. A prototype system has been developed which can model conventional and statistical tolernaces, and a limited set of geometric tolerances. The prototype system is limited to the modeling of single parts, but can perform both a worst case analysis and a statistical analysis. Results on several simple parts with known characteristics are presented which demonstrate the accuracy of the system and the types of analysis it can perform. The paper concludes with a discussion of extensions to the prototype system to a broader range of geometry and the handling of assemblies.

scholarly journals FAKTOR KEPUASAN WISATAWAN PENGGUNA TRANSPORTASI LAUT DARI BALI KE GILI TRAWANGAN

Jurnal IPTA ◽  
2018 ◽  
Vol 6 (2) ◽  
pp. 124
Author(s):  
Syukriyan Abrar Syah ◽  
Ni Gusti Ayu Susrami Dewi ◽  
Putu Agus Wikanatha Sagita
Keyword(s):  
Quality Of Service ◽  
Dominant Factor ◽  
Sea Transport ◽  
Marine Transportation ◽  
Factors Affecting ◽  
Cost Factor ◽  
Level Of Satisfaction ◽  
The Cost ◽  
Selection Of

This research aims to analyze factors affecting the satisfaction of tourists in the use of marine transportation from Bali toward Gili Trawangan. The benefits of this research useful to the company in improving the services for tourists who will use the services of a crosswalk leading to Gili Trawangan.The respondents in this research totalled 190 respondents, the selection of the sample using the method of purposive sampling, the data in this study were analyzed using the analysis factors that help by statistikal program SPSS version 17.0 for windows. The results of this study are: 1) the satisfaction of tourists in the use of sea transport in general are at a level of satisfaction. 2) there are three factors that affect the satisfaction of tourists formed i.e. factors quality of maids, the cost factor & ease factors and product quality. Quality of service factor is the most dominant factor influencing the satisfaction of travellers with variable reliability as the dominant variables, and the variable availability schedule is a variable that must be improved.

scholarly journals Technical parameters of high speed lines as the determinant for selection of rolling stock

2018 ◽  
Vol 180 ◽  
pp. 06007
Author(s):  
Jan Raczyński
Keyword(s):  
High Speed ◽  
Point Of View ◽  
Rolling Stock ◽  
High Speed Rail ◽  
Technical Parameters ◽  
Rail Vehicle ◽  
Railway Infrastructure ◽  
The One ◽  
Selection Of

Choosing a high-speed rail vehicle depends on many factors. On the one hand, there are requirements for ensuring the quality of service for passengers, on the other hand, there are constraints resulting from the parameters of available infrastructure. Also a relation of the benefit and financial costs associated with the purchase and the operation of rolling stock is essential. Technical characteristics of vehicles selected for operating a particular system is a compromise between the three groups of requirements. In this article technical parameters of railway infrastructure and rolling stock are classified and then analysed from the TSI requirements point of view.

Material Selection of Water-Ring Vacuum Pump in Yellow Phosphorus Tail Gas Industry

2013 ◽  
Vol 690-693 ◽  
pp. 1520-1523
Author(s):  
Hong Mei Yu
Keyword(s):  
Production Process ◽  
Material Selection ◽  
Medium Composition ◽  
Vacuum Pump ◽  
Point Of View ◽  
Gas Industry ◽  
Yellow Phosphorus ◽  
Gas System ◽  
Water Ring ◽  
Selection Of

Material selection of water-ring vacuum pumps in the chemical industry is closely related to the suction gas medium composition. Using the case of 70,000 tons of sodium yellow phosphorus tail gas system of water-ring vacuum pump in Guizhou Kaiyang Qingli tianmeng Chemical Ltd. (hereafter abbreviation as Tianmeng Company), this paper introduces vacuum pump in the production process of yellow phosphorus tail gas, according to the characteristics of corrosion in acidic media on flow passage component, and analyze the factors influencing the selection of materials from the point of view of the production process of yellow phosphorus tail gas.

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