Slurry transport uses several methods:
hydraulic
Hydraulics () is a technology and applied science using engineering, chemistry, and other sciences involving the mechanical properties and use of liquids. At a very basic level, hydraulics is the liquid counterpart of pneumatics, which concer ...
conveying; conventional lean
slurry
A slurry is a mixture of denser solids suspended in liquid, usually water. The most common use of slurry is as a means of transporting solids or separating minerals, the liquid being a carrier that is pumped on a device such as a centrifugal pu ...
conveying; and high concentration slurry disposal (HCSD). The latter, HCSD, is a relatively modern approach, which is used to transfer high throughputs of fine
fly ash
Coal combustion products (CCPs), also called coal combustion wastes (CCWs) or coal combustion residuals (CCRs), are byproducts of burning coal. They are categorized in four groups, each based on physical and chemical forms derived from coal combust ...
over long distances (>) using high pressure diaphragm pumps with
velocities of around 2 m/s. Ash disposal is simple as the ash
solidifies
Freezing is a phase transition in which a liquid turns into a solid when its temperature is lowered below its freezing point.
For most substances, the melting and freezing points are the same temperature; however, certain substances possess dif ...
easily and the system does not produce the waste water or
leachate
A leachate is any liquid that, in the course of passing through matter, extracts soluble or suspended solids, or any other component of the material through which it has passed.
Leachate is a widely used term in the environmental sciences wh ...
problems which can often be associated with ash
lagoons
A lagoon is a shallow body of water separated from a larger body of water by a narrow landform, such as reefs, barrier islands, barrier peninsulas, or isthmuses. Lagoons are commonly divided into '' coastal lagoons'' (or ''barrier lagoons'') a ...
.
Examples
Typical HCSD systems include the Clyde Bergemann solution designed to reduce water usage (up to 90% by weight), reduce ground and surface
water pollution
Water pollution (or aquatic pollution) is the contamination of Body of water, water bodies, with a negative impact on their uses. It is usually a result of human activities. Water bodies include lakes, rivers, oceans, aquifers, reservoirs and ...
, reduce dust emission surrounding
landfill
A landfill is a site for the disposal of waste materials. It is the oldest and most common form of waste disposal, although the systematic burial of waste with daily, intermediate and final covers only began in the 1940s. In the past, waste was ...
site, increase disposal area working capacity and lower
energy consumption
Energy consumption is the amount of energy used.
Biology
In the body, energy consumption is part of energy homeostasis. It derived from food energy. Energy consumption in the body is a product of the basal metabolic rate and the physical acti ...
.
See also
*
High-density solids pump
References
2: Miedema, S.A., Slurry Transport: Fundamentals, a Historical Overview and The Delft Head Loss & Limit Deposit Velocity Framework. http://www.dredging.org/media/ceda/org/documents/resources/othersonline/miedema-2016-slurry-transport.pdf
External links
CASE STUDY: Modern materials handling solution installed at Eraring power plant, Australia
{{DEFAULTSORT:Slurry Transport
Waste treatment technology