A study of basic properties of mazut coal fuels

In article the results of theoretical and experimental researches of composition, rheological and thermophysical properties of mazut coal fuels, based on mazut M100 type и Kuznetsk lean coal are presented. Dependencies to determine dynamic viscosity at different shear rates and mass content of coal dust are obtained. Heat capacity values and thermal conductivity of mazut coal fuels are shown. The obtained results can be used at hydrodynamic parameters calculation during moving in the pipes and heat-exchange apparatus and also using the mazut coal fuels on power and transport plants

Energy technological complex based on the use of coal

The paper proposes a flow chart of an energy technology complex based on thermochemical processing of solid fuels with a consistent removal of separation products. The scheme is designed for the use of coal and other solid fuels, as a result of the developed methodology for modeling the processes occurring during the thermal decomposition of the organic mass. Calculations of the circuit elements show that the thermal efficiency is increased when implementing successive separation of exhaust coal products

Comprehensiveuse of peat on base molecular composition of its organic mass

In article considers the main directions of use of peat products and its thermal and chemical processing industry and the energy sector. The analysis of organic peat mass, modeling of molecular structure. The basic structural fragments of the compounds are obtained based on the treatment processes (hydropyrolysis and hydrogenolysis) and the composition obtained by the decomposition products. Industry applications of the products are chosen

Assessment of indicators of efficiency of the steam-turbine mini-thermal power plants burning coal

In work results of calculations of main units of steam -turbine mini-thermal power plants of low power: 6, 11,4, 12, 20 and 25 MW intended for work in the autonomous mode are presented. On the basis of material, thermal and the exergy balances efficiency indicators – the exergy efficiency and specific expenses of fuel are defined. With a greatest exergy efficiency at the  level of  33%  have  MW  blocks 6,  20  and  25  that testifies to  a  possibility of  effective combination of the boiler and turbine equipment of this power and also completing of technological schemes of mini-thermal power plant on the basis of the released drying and mill equipment, boilers and turbines of low power

Evaluation of energy and resource saving effect at implementation of hybrid objects of small distributed generation in the republic of Vietnam

The work presents the main characteristics of the most efficient solar energy technologies, including in small distributed energy. The use of hybrid technologies based on the use of solar radiation is justified. The prospects of these facilities in one of the provinces of the Republic of Viet Nam (Ninh Tuan), which is characterized by the highest intensity of solar radiation, have been determined. The results of calculation of the station with capacity of 4.6 MW, operating on the basis of use of GTU without use of solar energy and its use for heating of air entering the combustion chamber, are presented. The energy-saving effect of the introduction of hybrid technologies is due to the increase in the efficiency of the station by 6% to 10% depending on the time of year and the characteristic intensity of solar radiation and ambient temperature. A significant decrease in the consumption of fuel (natural gas) used in the gas turbine plant has been detected

Analysis of coal different brands to production energy and chemicals

The analysis of the largest Russian coal fields in terms of possibility of mined coal use in gasifiers for energy and chemical production was conducted in the article. A review of the current worldwide gasification technology and the chemicals production from syngas was given. The bases of methanol, ammonia and carbon monoxide production from syngas were presented. The data for the gasification time of coal dust and coal-water fuel and required components content for methanol, carbon monoxide, ammonia production were calculated

Comparative analysis of reduce the viscosity of coal-water fuels

The mechanism of action and the effect of plasticizing agents on the rheological properties of the suspensions, the solid phase of which is represented monodisperse and bifractional coal dusts have been studied. The results of experimental studies of the viscosity of coal-water fuel with the content of the Kuznetsk coal brand T 60% (wt.), the fine fraction of which is 5% solids have been given. The dependence of the dynamic viscosity of coal-water fuel shear rate using different plasticizers: soda and baking soda, sodium sulphite and technical lignosulfonate have been obtained. It was found that the most effective of these plasticizers is technical lignosulfonate

THE ANALYSIS OF PROSPECTS OF USING COAL AT THE OBJECTS OF SMALL DISTRIBUTED GENERATION

In the article the prospects of using local solid fuel as an energy resource at the objects of small distributed generation is analyzed. The estimation of coal supply of Russian regions is carried out. Coal reserves for each of the regions are reduced to the unitary parameters - per head of the population, area and gross regional product which allowed a comparative assessment with the identification of regions where the location of low-capacity power plant is preferable

Complex use of ash and slag waste

In the article an overview of the main direction of complex use ash and slag waste from coal-fired stations was provided. The composition of ash waste, methods of isolation of valuable components and the key areas of their further using were noted. The results of the analysis of residual carbon, nitrogen and mineral part of ash and slag from the Kirov and Moscow ash dumps of Kazanskaya heat and power station - 2 were shown and perspective directions their utilization were determined

Assessment of efficiency and prospects for the use of hybrid thermal low-capacity power plants in the Republic of Vietnam

The growing demand for energy and fossil fuels creates increased number of difficulties, while renewable energy sources are still rarely used worldwide, particularly in Vietnam. In this article hybrid thermal power plants based on gas turbine plants are discussed, the increased efficiency of which is achieved by air heating after the compressor in solar air heaters. The basic design equations and the results of evaluating the efficiency and fuel consumption are presented for two thermal power plants of 4.6 MW and 11.8 MW. The dependence of the results on the intensity of solar extraction for the climatic conditions of the Ninh Thuan province of the Republic of Vietnam is discussed