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ABSTRACT The effects of coal characteristics on the properties of coal water slurry (CWS) were systemically studied using sixteen Chinese coals of different ranks from lignite to anthracite. The correlation between coal properties and CWS characteristics were investigated by multivariate progressive regression analysis. CWS properties examined in this study included slurryability ...
Coal-water slurry fuel (CWSF or CWS or CWF) is a fuel which consists of fine coal particles suspended in water. Presence of water in CWS reduces harmful emissions into the atmosphere, makes the coal explosion-proof, makes use of coal equivalent to use of liquid fuel (e.g. heating oil), and gives other benefits (see below).
As per simulation results, coal forms and operating conditions caused a significant effect on overall gasification performance. In syngas composition, H 2 mol fraction reached at maximum, when the slurry form of coal was used for gasification. This effect is remarkable for generating hydrogen-rich fuel from lignite without consuming steam ...
Nov 14, 2014· Coal would be crushed, then mixed with water to create a slurry and sent via pipeline to its destination, where the mixture was dried, then burned. When in the pipeline, the slurry moved along at a leisurely four miles an hour. The first proposed project using Wyoming coal—and Wyoming water—was the ETSI project.
blend is composed of 85% clean coal and 15% recovered coal fines. The coal-water slurry is prepared at 60% solids with a viscosity less than 500 centipose and 80-90% of solid particles passing through 200 mesh. This paper contains analysis of clean coal, recovered coal fines, and coal-water slurry fuel as well as combustion characteristics.
Coal sludge impoundments, or "ponds," can store billions of gallons of liquid coal waste known as sludge or slurry. Coal companies say the sludge contains mostly water, rocks and mud. But it also contains carcinogenic chemicals used to process coal and toxic heavy metals that are present in coal, including arsenic, mercury, chromium ...
analyses. This work introduces the Phase Inversion-based Coal-CO 2 Slurry (PHICCOS)feeding system, in which coal-CO 2 slurry is prepared at ambient temperature via coal-water slurry.Steady-state process simulation is used to estimate the performance of the proposed slurry preparation and feeding system for bituminous coal and lignite. An
Abstract The particle size distribution of the solids forming a slurry has a predominant role because of its direct effect on the slurry's rheology. The process of comminution, which is the most important factor affecting the cost of the slurry preparation, is directly affected by the particle size distribution. Control of particle size and size distribution is generally considered to be the ...
The rheological behavior of coal water slurry of Indian coal is studied using rheometer. The effect of particle size, solid concentration and temperature on rheology of the coal water slurry has ...
Coal water slurry (CWS) made with lignite is preferred during the storage and transportation of lignite to prevent its spontaneous combustion.[2,3] However, lignite con-tains high moisture (e.g. 30 %) that consumes extra thermal energy to burn in the boiler or convert to syngas in the gasifier
Coal slurry is a mixture of solids (mined coal) and liquids (usually water) produced by a coal preparation plant. As a slurry, coal is separated from non-combustable components (ash) and can be fractionated by particle size as well. Coal slurry can be transferred by pipeline or with specialised pumps such as a progressive cavity pump to pump the highly abrasive, corrosive and viscous coal slurry.
An estimated 11% increase in cold gas efficiency has been predicted for coal-CO 2 slurries relative to coal-water slurries for lignite, while a 5% increase in cold gas efficiency was predicted for a coal-CO 2 slurry over a coal-water slurry for bituminous coal.
slurry is prepared at ambient temperature via coal-water slurry. Steady-state process simulation is used to Steady-state process simulation is used to estimate the performance of the proposed slurry preparation and feeding system for bituminous coal and lignite.
Jan 19, 2020· Coal slurry is a waste product of coal mining and processing, and contains both liquid and solid constituents. Particles of coal, water and chemicals used to prepare coal for market make up the slurry. Suitable methods of processing coal slurry for reuse or return to the environment have not been implemented, so the waste is held in storage in above ground ponds or pumped into worked-out ...
Using lignite as an adsorbent and subsequently as a material for coal water slurry (CWS) preparation represents an alternative method for coal chemical wastewater treatment. However, the components in these wastewaters could affect the CWS performance, especially ammonia nitrogen (NH 4 +-N).
and the maximum concentration of coal in water that could be handled. A test loop was set up as shown in Figure 2. The slurry mix tanks and the positive displacement pumps of the HYGAS Pilot Plant were briefly us ed pnd lignite coal-water slurries were prepared in about 15% to 505 coal in water. The
The coal blend is composed of 85% clean coal and 15% recovered coal fines. The coal-water slurry is prepared at 60% solids with a viscosity less than 500 centipose and 80-90% of solid particles passing through 200 mesh. This paper contains analysis of clean coal, recovered coal fines, and coal-water slurry fuel as well as combustion ...
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Coal water slurry currently refers to the coal-based liquid fuel which reappeared in the 1970s when the world wide price of oil rose and the supply became scarce. The main components of coal water slurry are coal, water, and additives inputted in the coal milling process to create a liquid fuel with similar flow properties as oil. The coal ...
@article{osti_5085153, title = {Coal water slurry fuels: an overview}, author = {Pommier, L. and Frankiewicz, T. and Weissberger, W.}, abstractNote = {The conclusions which we draw from our work to date, and to a certain extent from the industry's experience to date, are the following: (1) Occidental Research Corporation's (ORC) coal-water ...
Coal slurry can be transferred by pipeline or with specialized pumps such as a progressive cavity pump to pump the highly abrasive, corrosive and viscous coal slurry. More than 7 billion tons of coal are mined per year (2010), using approximately 200 litres of water per ton.
• Coal Water Slurry (CWS) is a new type of liquid fuel, environmentally friendly fuel that can replace petroleum as fuel in the energy conversion and process industries. • CWS consists of 65% - 70% coal, 30% - 35% water and small quantities of chemical additives.
Shangwan coal is a low-rank coal from inner Mongolia. Shangwan coal particles show electronegativity in the slurry, because there are many oxygenated functional groups, such as the carboxyl group, hydroxyl group, and carbonyl group on the surface and in the core of the particles. Besides, because these functional groups are all hydrophilic, Shangwan coal shows strong water-retaining capacity ...
This paper examines a coal–water slurry containing petrochemicals (CWSP) based on lignite, bituminous coal, anthracite, and typical waste—carbon residue obtained from the pyrolysis of tires. Waste motor oil is used as a liquid fuel component of the slurry. The study of CWSP ignition is performed via placing a fuel droplet on a low-inertia thermocouple junction (junction diameter is 0.1 mm ...
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