Group: BEUMER Group
Catalog excerpts
Two Eurosilo® Concept for Handling CCR Waste to Landfills Written by Richard Munson Introduction In December 2014 the EPA published the long awaited final ruling on Coal Combustion Residuals (CCR) handling. The rule was published in the Federal Register on April 17, 2015. The ruling is fair, but six years of uncertainty delayed the implementation of wet to dry systems to transport CCR’s to landfills because of the lack of clarity on how to store these wastes. Now utilities and supporting vendors will be focusing on their ash ponds to determine if they comply with the regulations or if they need to be modified or closed. There is a lot of work to do for each utility to determine where they stand on each pond or impoundment and then in determining their path forward. This paper focuses on a new way to store and transport the CCR materials which saves capital cost, reduces operating costs and simplifies the movement of CCR material. We realize that the CCR rule focuses more on the integrity of impoundments but how to move this material is important too. Some operators are confronting the question now of how to store and move their CCR waste because the volumes are enormous and, over time, small efficiencies add up to big savings.
Open the catalog to page 1Two E urosi l o® Conce pt for Handling CCR Waste to Landfills Not much has been done on new designs to transport CCR because moving this material is complicated. Handling three or four different types of CCR material spawns complex storage and handling equipment designed to hold and then transport large amounts of each material. This inevitably drives the construction of more conservative designs. This creates high capital costs to build and high costs to operate and maintain these systems. Also, CCR materials are not the ideal materials to handle so engineers often concentrate on...
Open the catalog to page 2Two E urosi l o® Conce pt for Handling CCR Waste to Landfills The Two Eurosilo CCR Handling Concept Landfill SIde Emergency Stackout and CCR Eurosilo Pipe Conveyor For gypsum handling with the Eurosilo the sturdy augers work perfectly for FGD materials. There are approximately 60 gypsum Eurosilos in operation in Europe. Of that total approximately half have dewatering on top of the silo to minimize cost and footprint. The primary challenge of this concept is to demonstrate that the operator can store the comingled CCR in the landfill Eurosilo and justify the cost. Most fly ash blends that...
Open the catalog to page 3Two E urosi l o® Conce pt for Handling CCR Waste to Landfills Capital Cost Savings Tw o Eu ro si l o ® Co n cep t fo r Han d l i n g CC R Waste to La n d fills More Sustainable and Environmentally Friendly • ower capital costs by consolidating the gypsum handling L equipment footprint at the plant – estimated savings are $8,000,000 to $10,000,000 depending on storage sizes needed. The list of equipment eliminated is shown in the next section under operating cost savings, • uch faster schedule to construct, the slip forming of all silos can be M done one after another, • version of the...
Open the catalog to page 4Two E urosi l o® Conce pt for Handling CCR Waste to Landfills Our testing has shown that pure PRB fly ash sets up very fast in the presence of water. For normal conditioning percentages such as 15% to 20% moisture the fly ash sets up extremely fast and needs to be mixed violently with a cutting motion to keep the conditioned mixture from setting up into a solid mass. There are a number of conditioners that do just that but more work is necessary to implement this type of conditioning into this concept. We speculated that mixing the conditioned PRB fly ash with the dewatered gypsum might...
Open the catalog to page 5Two E urosi l o® Conce pt for Handling CCR Waste to Landfills This concept offers a plant that needs to move bottom ash, fly ash and gypsum to a landfill the flexibility to split the storage of the material to the plant and landfill and then move it rapidly to the landfill with no restriction on rate. This will save a significant amount of operating time just to transfer the material to the landfill. Once stored in the landfill Eurosilo the truck loading operation is faster. For large volumes of CCR to be moved over a 20 year period this truck loading efficiency gain adds up to sizable...
Open the catalog to page 6Two E urosi l o® Conce pt for Handling CCR Waste to Landfills www.beumergroup.com BEUMER Kansas City, LLC 4435 Main Street, Suite 600 KANSAS CITY, Missouri 64111 USA Newtonstraat 26-28 P. O. Box 1047 1440 BA Purmerend The Netherlands
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