Experimental Investigation on Mixed Combustion Characteristics of Coal, Tobacco Straw, and Cinder in an Energy-Saving Bake Process

2020 ◽  
Vol 143 (2) ◽  
Author(s):  
Yunfei Yan ◽  
Ting Zhao ◽  
Hongliang Guo ◽  
Fulei Xu ◽  
Li Zhang ◽  
...  
Keyword(s):  
Characteristic Parameter ◽  
High Energy ◽  
Combustion Characteristics ◽  
Combustion Characteristic ◽  
Fixed Carbon ◽  
Tg And Dtg ◽  
The One ◽  
The Individual ◽  
Carbon Burning ◽  
Positive Effect

Abstract In view of high-energy consumption, high baking cost, and serious pollution emission during the baking process of tobacco leaves, thermogravimetric analysis is employed to investigate the combustion characteristics of coal, tobacco straw, and cinder. Analyzing thermogravimetric-derivative of thermogravimetric (TG-DTG) characteristics of samples with different blending ratios and based on the ignition temperature and burnout temperature, the combustion characteristics of the samples are obtained. Compared with the individual combustion of coal, the blending ratio of the optimal positive effect is obtained. It is illustrated that different blending ratios of coal, tobacco straw, and cinder result in different effects between promotion and inhibition. Tobacco straw is beneficial to burn on fire but adverse to keep combustion of fixed carbon. Compared with the TG and DTG characteristics in different blending ratios of coal, tobacco straw, and corresponding combustion characteristic parameter, it is illustrated that the best blending ratio of tobacco straw is 40%. According to the TG and DTG characteristics of different blending ratios of coal, cinder, and corresponding combustion characteristic parameter, it is shown that the more blending ratio of cinder, the more adverse effect to fixed carbon burning. The composite fuels with 40% tobacco straw, 10% coal cinder, and 50% coal have two obvious advantages. On the one hand, it can maintain quick burning and the volatile combustion of the tobacco straw at low-temperature stage. On the other hand, it can keep continuous combustion of the fixed carbon in coal at high-temperature stage.

Non-drug correction of skin diseases with stress genesis

10.12737/7222 ◽  
2014 ◽  
Vol 8 (1) ◽  
pp. 0-0
Author(s):  
Шерина ◽  
T. Sherina ◽  
Божко ◽  
S. Bozhko ◽  
Гуртовенко ◽  
...  
Keyword(s):  
Skin Diseases ◽  
Acne Vulgaris ◽  
Combined Treatment ◽  
Individual Characteristics ◽  
Severity Of Disease ◽  
Adult Phase ◽  
The One ◽  
The Individual ◽  
Outpatient Settings ◽  
Positive Effect

In the research, 31 women and 8 men with skin diseases (eczema, psoriasis, atopic dermatitis, acne vulgaris, skin itching, hives) were selected, as a result of the survey and examination, the presence of their stress history has been found. All patients had mild or moderate severity of disease, sub-acute or chronic, the adult phase. Treatment was a combination of psychotherapy, phytotherapy and reflexotherapy (acupuncture).The positive effect was confirmed by the dynamic parameters used in study of standard scales and test with severity decrease in scores. (р>0,05). Using the combined treatment made possible to focus on the one of the methods included in the combination, depending on the individual characteristics of the individual patient. The good tole-rability, no side effects and availability allow to recommend the use of this medical complex in hospital and outpatient settings.

Investigation on the Co-Combustion Characteristics of Textile Dyeing Sludge and Sawdust

2011 ◽  
Vol 391-392 ◽  
pp. 1440-1444
Author(s):  
Pei Tao Wei ◽  
Xu Nan Ning ◽  
Yun Zhou ◽  
Jing Yong Liu ◽  
Jun Yu
Keyword(s):  
Thermogravimetric Analysis ◽  
Combustion Characteristics ◽  
Combustion Characteristic ◽  
Burning Time ◽  
Heating Rates ◽  
Fixed Carbon ◽  
Characteristic Index ◽  
Textile Dyeing ◽  
Carbon Combustion ◽  
Two Stages

The combustion characteristics of textile dyeing sludge，sawdust and its blends at different proportions were studied by thermogravimetric analysis(TG-DTG) at different heating rates. The results showed that there existed four obviously temperature zones during the textile dyeing sludge combustion curves, which were corresponding to moisture's exhalation、two stages of devolatilizations and fixed carbon combustion. With the increasing of heating rates, the burning time was shorten and the combustion rate was faster of the textile dying sludge. DTG curve of the blends was more closed to that of the larger proportions. Comprehensive combustion characteristic index SN of the sludge-sawdust blends showed an uptrend, which demonstrated that higher volatility had better combustion characteristics.

scholarly journals Combustion Characteristics and Kinetics Study of Pulverized Coal and Semi-Coke

2019 ◽  
Vol 38 (2019) ◽  
pp. 783-791 ◽  
Author(s):  
Guisheng Yang ◽  
Zhihong Yang ◽  
Jinliang Zhang ◽  
Zhanhai Yang ◽  
Jiugang Shao
Keyword(s):  
Heating Rate ◽  
Compensation Effect ◽  
Combustion Process ◽  
Characteristic Parameter ◽  
Metamorphic Grade ◽  
Combustion Characteristics ◽  
Combustion Characteristic ◽  
Energy Of Combustion ◽  
Combustion Performance ◽  
Shrinking Core

AbstractCombustion process of bituminous coal, steam coal, anthracite (AC) and semi-coke were investigated through thermogravimetric analysis method and influence of metamorphic grade as well as heating rate on combustion characteristics were analyzed. Results show that combustion performance could not be represented by single combustion characteristic parameter. Through analysis of comprehensive combustion characteristic indexes, with increase of metamorphic grade combustion performance of coal is lowered, and combustion performance of semi-coke and AC are close to each other. With increase of heating rate, combustion curves move into high temperature region and comprehensive combustion characteristic indexes are increased, which show that the combustion performance is improved. Random pore model (RPM), unreacted shrinking core model (URCM) and volume model were used to calculate kinetic parameters of combustion process. Results show that RPM has the best performance to represent combustion process of the four samples and through calculation by RPM kinetic energy of combustion process for all samples are between 43.08 and 99.43 kJ/mol, and there is compensation effect during combustion process.

Combustion Characteristic Parameter Testing and Caculating of Single-Base Propellant

2014 ◽  
Vol 1006-1007 ◽  
pp. 185-187
Author(s):  
Yong Kang Chen ◽  
Ming Hua Chen ◽  
Li Zhang ◽  
Ran Zhao ◽  
Jian Wen
Keyword(s):  
Charge Density ◽  
Combustion Rate ◽  
Characteristic Parameter ◽  
Combustion Characteristics ◽  
Combustion Characteristic ◽  
Characteristic Parameters ◽  
Single Base

Combustion characteristics of single base propellant are tested with closed bomb. Combustion characteristic parameters are calculated through P-t curves. Gunpowder force f=974.30J·g-1, covolume α=1.111cm3·g-1. Laws of combustion rate are u=4.97×10-3P0.82 (charge density Δ1=0.10g·cm-3) and u=3.97×10-3P0.86(charge density Δ2=0.16g·cm-3).

scholarly journals Use of Mixed Fuel Based on Brown Coal and its Thermal Processing Products in Energy Boilers

2021 ◽  
pp. 106-117
Author(s):  
Andrei V. Zhuikov ◽  
Anatoly I. Matiushenko ◽  
Dmitry A. Loginov ◽  
Anatoly M. Zhizhaev ◽  
Petr N. Kuznetsov ◽  
...  
Keyword(s):  
Brown Coal ◽  
Thermal Processing ◽  
Ignition Temperature ◽  
Combustion Process ◽  
Combustion Characteristics ◽  
Coke Particle ◽  
Electron Microscopic ◽  
Mixed Fuel ◽  
Tg And Dtg ◽  
Positive Effect

The work investigated the thermal behavior of Borodino coal, brown coal coke and mixed fuel, consisting of 80 % Borodino brown coal and 20 % brown coal coke during the combustion process using thermogravimetric analysis. The chemical composition of the samples is presented. When analyzing the TG-DTG curves, combustion characteristics were determined, such as: ignition temperature (Ti) and coke burnout temperature (Te), flammability index, integral combustion parameter. To determine Ti and Te, the technique of crossing the TG and DTG curves was applied and justified. An electron microscopic study of the cross-section of a lignite coke particle has been carried out. The results of the study showed that the addition of lignite coke to brown coal has a positive effect on its combustion characteristics

P20 phosphor on polyimide as a large area high-resolution transmission screen for slow scan CCD systems

1995 ◽  
Vol 53 ◽  
pp. 20-21
Author(s):  
C. C. Ahn ◽  
S. Karnes ◽  
M. Lvovsky ◽  
C. M. Garland ◽  
H. A. Atwater ◽  
...  
Keyword(s):  
Mechanical Stability ◽  
High Energy ◽  
Practical Implementation ◽  
Line Pair ◽  
Modulation Transfer ◽  
Large Area ◽  
Ccd Imaging ◽  
Transmission Electron ◽  
The One ◽  
Beam Broadening

The bane of CCD imaging systems for transmission electron microscopy at intermediate and high voltages has been their relatively poor modulation transfer function (MTF), or line pair resolution. The problem originates primarily with the phosphor screen. On the one hand, screens should be thick so that as many incident electrons as possible are converted to photons, yielding a high detective quantum efficiency(DQE). The MTF diminishes as a function of scintillator thickness however, and to some extent as a function of fluorescence within the scintillator substrates. Fan has noted that the use of a thin layer of phosphor beneath a self supporting 2μ, thick Al substrate might provide the most appropriate compromise for high DQE and MTF in transmission electron microcscopes which operate at higher voltages. Monte Carlo simulations of high energy electron trajectories reveal that only little beam broadening occurs within this thickness of Al film. Consequently, the MTF is limited predominantly by broadening within the thin phosphor underlayer. There are difficulties however, in the practical implementation of this design, associated mostly with the mechanical stability of the Al support film.

PENGARUH LATIHAN RANGE OF MOTION (ROM) AKTIF ASSITIF TERHADAP RENTANG GERAK SENDI PADA LANSIA YANG MENGALAMI IMMOBILISASI FISIK

2019 ◽  
Vol 13 (2) ◽  
Author(s):  
Andri Setyorini ◽  
Niken Setyaningrum
Keyword(s):  
Range Of Motion ◽  
Human Life ◽  
The Elderly ◽  
General Purpose ◽  
Test Statistic ◽  
Physical Mobility ◽  
Motion Exercise ◽  
The One ◽  
The Individual ◽  
Active Training

Background: Elderly is the final stage of the human life cycle, that is part of the inevitable life process and will be experienced by every individual. At this stage the individual undergoes many changes both physically and mentally, especially setbacks in various functions and abilities he once had. Preliminary study in Social House Tresna Wreda Yogyakarta Budhi Luhur Units there are 16 elderly who experience physical immobilization. In the social house has done various activities for the elderly are still active, but the elderly who experienced muscle weakness is not able to follow the exercise, so it needs to do ROM (Range Of Motion) exercise.   Objective: The general purpose of this research is to know the effect of Range Of Motion (ROM) Active Assitif training to increase the range of motion of joints in elderly who experience physical immobility at Social House of Tresna Werdha Yogyakarta unit Budhi Luhur.   Methode: This study was included in the type of pre-experiment, using the One Group Pretest Posttest design in which the range of motion of the joints before (pretest) and posttest (ROM) was performed  ROM. Subjects in this study were all elderly with impaired physical mobility in Social House Tresna Wreda Yogyakarta Unit Budhi Luhur a number of 14 elderly people. Data analysis in this research use paired sample t-test statistic  Result: The result of this research shows that there is influence of ROM (Range of Motion) Active training to increase of range of motion of joints in elderly who experience physical immobility at Social House Tresna Wredha Yogyakarta Unit Budhi Luhur.  Conclusion: There is influence of ROM (Range of Motion) Active training to increase of range of motion of joints in elderly who experience physical immobility at Social House Tresna Wredha Yogyakarta Unit Budhi Luhur.

PHILOSOPHICAL PROPAEDEUTICS IN THE SYSTEM OF PRESCHOOL EDUCATION

2020 ◽  
Vol 22 (11) ◽  
pp. 11-15
Author(s):  
Gan N.Yu. ◽  
Ponomareva L.I. ◽  
Obukhova K.A.
Keyword(s):  
Modern Science ◽  
Preschool Education ◽  
Modern Society ◽  
Social Relevance ◽  
The Social ◽  
Moral Problems ◽  
The Subject ◽  
The One ◽  
The Individual ◽  
And Training

Today, worldview, spiritual and moral problems that have always been reflected in education and upbringing come to the fore in society. In this situation, there is a demand for philosophical categories. One of the priority goals of education in modern conditions is the formation of a reasonable, reflexive person who is able to analyze their actions and the actions of other people. Modern science is characterized by an understanding of the absolute value and significance of childhood in the development of the individual, which implies the need for its multilateral study. In the conditions of democratization of all spheres of life, the child ceases to be a passive object of education and training, and becomes an active carrier of their own meanings of being and the subject of world creation. One of the realities of childhood is philosophizing, so it is extremely timely to address the identification of its place and role in the world of childhood. Children's philosophizing is extremely poorly studied, although the need for its analysis is becoming more obvious. Children's philosophizing is one of the forms of philosophical reflection, which has its own qualitative specificity, on the one hand, and commonality with all other forms of philosophizing, on the other. The social relevance of the proposed research lies in the fact that children's philosophizing can be considered as an intellectual indicator of a child's socialization, since the process of reflection involves the adoption and development of culture. Modern society, in contrast to the traditional one, is ready to "accept" a philosophizing child, which means that it is necessary to determine the main characteristics and conditions of children's philosophizing.

Hermeneutic circle in development of methodological culture of future music teacher

2017 ◽  
pp. 154-158
Author(s):  
A. S. Koval
Keyword(s):  
Future Teacher ◽  
Music Teacher ◽  
Basic Principles ◽  
Hermeneutic Circle ◽  
High Culture ◽  
Text Understanding ◽  
Hermeneutic Approach ◽  
The Future ◽  
The Individual ◽  
Positive Effect

This article is devoted to the studying hermeneutic circle in the development of methodological culture of future music teacher. Under the conditions of globalization processes, tendencies of convergence of world cultures improvement of culturological training of student youth requires new approaches, in particular, culturological training of students of pedagogical specialties. The task of pedagogical education is to develop a teacher as a specialist and as a person of high culture, who has a special positive effect on the personality of school student. This article analyses the works of scientists dedicated to the issues of establishment and development of the hermeneutic approach in philosophical, psychological, and logical and gnosiological contexts. It is defined the essence of the concept of “hermeneutic circle” as one of the basic principles of the hermeneutic approach. There have been provided the examples of interpretation of the principle of hermeneutic circle by various scientists. Hermeneutic approach is applied in sciences such as pedagogy, psychology, economics, sociology etc. In pedagogical science the hermeneutic approach at the level of conceptual use was elaborated by A. Zakirova. She introduced the term “pedagogical hermeneutics”. Hermeneutic circle as a principle of text understanding is based on the interrelation of the part and the whole. Understanding of the whole consists of the understanding of the individual parts, and understanding of the parts requires understanding of the whole. The concepts of the part and the whole are correlated: the text is a part concerning the whole creative activity of the author, which in its turn is a part of the particular genre or literature in general, as well as the part of spiritual life and biography of the author. The idea of hermeneutic circle means also that there is no understanding of the text without certain prerequisites: understanding is preceded by some idea of what is yet to understand. There have been determined the peculiarities of the use of the principle of hermeneutic circle in the development of methodological culture of the future teacher of musical art. In light of hermeneutical trends, the penetration of which in the realm of musical art can be traced quite clearly, the use of the hermeneutic circle principle in the development of methodological culture of the future teacher of musical art appears not only in the narrow interpretation of the particular phenomenon or group of phenomena, but much wider — as a means of learning and understanding of the worldview by a person.

EFFECT OF BORON ON THE COMBUSTION CHARACTERISTICS OF METALLIZED HIGH-ENERGY MATERIALS

2020 ◽  
Author(s):  
A. Korotkikh ◽  
◽  
I. Sorokin ◽  
◽  
Keyword(s):  
Specific Impulse ◽  
Equilibrium Composition ◽  
Combustion Products ◽  
High Energy ◽  
Combustion Characteristics ◽  
Solid Propellants ◽  
Energy Materials ◽  
High Energy Materials ◽  
Condensed Combustion Products ◽  
Active Fuel Binder

The paper presents the results of thermodynamic calculations of the effect of pure boron additives on combustion characteristics of high-energy materials (HEM) based on ammonium perchlorate, ammonium nitrate, active fuel-binder, and powders of aluminum Al, titanium Ti, magnesium Mg, and boron B. The combustion parameters and the equilibrium composition of condensed combustion products (CCPs) of HEM model compositions were obtained with thermodynamic calculation program “Terra.” The compositions of solid propellants with different ratios of metals (Al/B, Ti/B, Mg/B, and Al/Mg/B) were considered. The combustion temperature Tad in a combustion chamber, the vacuum specific impulse J at the nozzle exit, and the mass fraction ma of the CCPs for HEMs were determined.

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