The dependence of ignition delay times and limiting ignition temperature on the coal particle size is more mark able or noticeable for organic coal-water fuel (OCWF) droplets than coal water fuel ...Web

The slurry density was found to increase by 14% at a temperature of 293 K with the substitution of water in coal-water fuel with a similar by weight amount of pyrogenetic water (no more than 25%). ... Effects of the physical properties of fuel on spray characteristics from a gas turbine nozzle. 15 August. Energy, 205 (2020), Article 118090.Web

Biochar-based slurry is a fossil-free-liquid fuel derived from a renewable source, biomass. This study aims to examine the properties of this fuel as an alternative to coal-water slurries. The slurries were produced by suspending 40 wt% biochar in a solution made of water and a surfactant.Web

@article{osti_5966825, title = {Coal slurry combustion}, author = {Hwang, L K}, abstractNote = {Experimental and numerical results are presented from examining the combustion of coal-slurry fuels. The combustion characteristics of a coal slurry agglomeration with and without metallic additives were investigated. The kinetics of the C-CO/sub 2/ reaction …Web

Research related to the combustion of coal-water fuel (CWF) is being conducted throughout the world in government, industrial and university facilities. In this paper studies are reviewed of several of many aspects of the combustion process, with emphasis on: atomization and carbon burnout and the properties of CWF that influence …Web

It was found that substitution of 10% of coal with liquid pyrolysis products of wood waste decreases the dynamic viscosity of the fuel by 3.2 times in comparison with two-component coal-water fuel. Density for all the slurries studied (changes in the mass of the components: coal – from 40 to 50%; water – from 40 to 50%; pyrogenetic liquid ...Web

Abstract. In the modern realities of the energy market, the use of coal-water slurries with liquid industrial waste is a promising way to solve several problems …Web

This article discusses the atomization of composite liquid fuels. A large group of injectors is considered. A comparative analysis of the atomization characteristics (droplet sizes and velocities, jet opening …Web

The U.S. Department of Energy's Office of Scientific and Technical InformationWeb

United States: Despite electricity demand increasing in the United States, coal-fired generation fell by almost 8% in 2022, reversing a 15% increase in 2021. The decrease in coal output was balanced by an increase in generation from natural gas and strong growth in renewables. As a result, coal's share of total global generation remained around ...Web

Formation and Control of Nitrogen Oxides. Bruce G. Miller, in Clean Coal Engineering Technology (Second Edition), 2017 Cofiring. Cofiring is the practice of firing a supplementary fuel, such as coal-water mixtures (CWM) or biomass, with a primary fuel (i.e., coal) in the same burner or separately but into the main combustion zone.Web

30 rowsBoth coal-oil mixtures and coal-water slurries are suitable for heating and steam-raising applications generally as an alternative to heavy fuel oil although they can be …Web

3. Great Southern of India Railway primarily used coal and patent fuel. Wood was used to some extent. The quantum of fuel used by a locomotive depends on the quality of coal, gradient of the line, weight of the train, class of traffic, etc. To secure economy in coal and wood consumption, attempts were made to use new fuels like pulverizedWeb

It was found that substitution of 10% of coal with liquid pyrolysis products of wood waste decreases the dynamic viscosity of the fuel by 3.2 times in comparison with two-component coal-water fuel. Density for all the slurries studied (changes in the mass of the components: coal – from 40 to 50%; water – from 40 to 50%; pyrogenetic liquid ...Web

PDF | Possibilities of coal-water fuel application in industrial power engineering are considered and described. Two main problems and disadvantages of... | Find, read and cite all the research ...Web

September 1986. All of this research related to combustion of coal-water fuels, but the workscope covered two entirely separate tasks which involved experimental work in three different facilities at MIT. The Task 1 investigations dealt with Fundamental Aspects of Coal-Water Fuel Droplet Combustion, and the experiments were carried out in LaminarWeb

For example, it is noted in [12] that the recommended value of the dynamic viscosity of coal–water fuel for spraying is 1000–1200 mPa·s at a viscometer spindle shear rate of 100 s[sup.-1]. This is a fairly high value, in comparison with the viscosity of heated fuel oil—20–50 mPa·s. As a result of high viscosity values, the diameter of ...Web

The preparation of coal-water slurry based on slime and water reduced the ignition and burnout temperature by up to 16%. Adding biomass and waste oils additionally stimulated the slurry ignition and burnout, which occurred at lower temperatures. ... Identification of slurry fuel components in a spray flow. 2022, Fuel ... (China, India, the …Web

Sambalpur: Mahanadi Coalfields Limited, a subsidiary of Coal India, has successfully tested a new robotic high-pressure nozzle. …Web

The article presents the results of studies of spraying multicomponent coal-water slurries with hot air. Coal, water, ethanol, and pyrogenetic liquid were used as …Web

The resulting finely dispersed spray creates the necessary conditions for intensive fuel combustion. ... Atmospheric Emissions and Pollution from the Coal-Fired …Web

Coal water slurry (CWS) is a fuel which consists of fine coal particle suspended in water. Presence of water in CWS reduces harmful emissions and makes the coal explosion proof thus makes it useful as a liquid fuel. The concept of coal water slurry dates back to Smith and Munsell (1879) [1] when patented for coal oil utilization as fuel …Web

Request PDF | Coal-water slurry atomization in a new pneumatic nozzle and combustion in a low-power industrial burner | A new pneumatic nozzle for spraying coal-water fuel based on the near-wall ...Web

@article{osti_10136513, title = {Coal-water slurry spray characteristics of a positive displacement fuel injection system}, author = {Seshadri, A K and Caton, J A and Kihm, K D}, abstractNote = {Experiments have been completed to characterized coal-water slurry sprays from a modified positive displacement fuel injection system of a diesel engine.Web

Impact of Fuel Properties on Combusting Jet Fuel Spray Breakup, Analyzed using High-Speed Phase Contrast Imaging ... and Injection Types on Solution Precursor High-Velocity Oxygen Fuel (HVOF) Nanostructured Coating Formation. 19 April 2017 | Industrial & Engineering Chemistry Research, Vol. 56, No. 17 ... Measurements of Coal …Web

Abstract. This Final Report is issued in two volumes, covering research into the combustion of coal-water fuels. Two separate but related tasks are discussed: Volume I, contains results obtained under Task 1 - ''Fundamental Aspects of Coal-Water Fuel Droplet Combustion''; Volume II describes the work of Task 2 - ''Secondary Atomization of Coal …Web

The spray characteristics of a liquid-gas pintle injector at different total momentum ratios (TMR) are investigated by means of experiment and numerical simulation.Water and nitrogen are used as simulant for liquid fuel ejected out from radial gap and gas oxidizer ejected out from axial annular gap, respectively.A high-speed …Web

The changes are 5-9% in comparison with coal-water slurry at a temperature of 293 K. Thermal preparation of slurries, according to the results of thermal imaging studies of coal-water fuel jet ...Web

In the present work an attempt have been made to upgrade the low grade Indian coal to high grade coal by using caustic (NaOH) leaching followed by acid (H 2 SO 4) treatment.The experimental works aimed at a selective attack on in situ MCL (Mahanadi Coal Limited) coal, Odisha, India with some fluxing agents like NaOH and H 2 SO 4.The …Web

Lower emissions would have significant benefits. Increasing renewable energy usage and allowing coal to taper-off in this policy scenario would lead to a 2.5 percent reduction in pollution, saving lives and leading to fewer missed school and workdays. It would also decrease coal imports by 14 percent by 2030, thus increasing resilience to ...Web

Atmospheric emissions and pollution from the coal-fired thermal power plants in India. Atmos. Environ. (2014) W. Chen et al. Clean coal technology development in China. Energy Pol. (2010) ... 293 to 333 K, makes it possible to increase the jet spraying angle by 21–29% compared to conventional two-component coal-water fuel at a …Web

The principles and contents of CWS fluidization–suspension combustion technology are introduced in detail in this paper. And a new type of 14 MW fluidization–suspension CWS-fired boiler was developed, the performance of which showed that boiler efficiency was 91.53%. Emission of SO 2 and NO x was 346.1 mg/m 3 and …Web

The study results of ignition of organic coal-water fuel (OCWF) compositions were considered. The main problems associated with investigation of these processes were identified. Historical perspectives of the development of coal-water composite fuel technologies in Russia and worldwide are presented. The advantages of the OCWF use …Web

power plant fuel is coal due to its relatively low price and simple transportation. However, ... (China, India, USA) ... the angle of the coal–water suspension spray cone is less than that of the.Web

Coal India Limited (CIL) is the world's largest coal mining company and produces 84 percent of India's thermal coal. 2 Most coal is sold to power producers, predominantly under fuel supply ...Web

Fig. 2 presents the appearance of the setup used to define the spraying behavior of coal-water slurries in the experiments. The experimental setup was made up of the following main elements: plunger 1 to squeeze out the fuel under study (150-ml syringe with a plunger rod 30 mm in diameter); atomizers 2 (using the Coandă effect [46]); …Web