LB Industrial Systems Clean Fly Ash Disposal Operations
EPA Rule Changesare prompting the industry to evaluate existing practices for ash handling and disposal to prepare for tightened regulatory compliance requirements. At the forefront of concerns is the how of disposing ash in landfills without creating a handling and transportation nightmare. With potentially every minor ash spill constituting a HAZMAT event, reducing (or even eliminating altogether) the multiple handling “ loading and unloading “ of fly ash becomes a critical consideration.
LB Industrial Systems brings leak-free solutions already proven in the handling, transfer conditioning and disposal of both class C and class F ash to address these emerging challenges. Our systems have been applied in various configurations to suit the specific needs of power plants.
The system shown in the photograph below has been in operation for over 15 years at a major southeastern US utility power plant. Fly ash is pneumatically transferred from silos near the units to disposal loactions up to ONE MILE away. Ash is receieved in the silo (installed at an angle to reduce the center of gravity), fed to a conditioner, discharged by the stackout conveyor, and placed and compated by bulldozers. The equipment is completely skid-mounted, so when one area of the landfill is sufficently filled, the unit can be disconnected, moved and returned to service in a new area in less than one day. The system is fully automated and connected to the plant only by a flexible ash pipeline, water supply line and data cable. (It can also be equipped with wireless radio control). It is equipped with its own generator and fuel tank, water tank, baghouse (for silo venting) and conditioner. The unit has processed an average of 40,000 tons per month of fly ash
A similar idea is applied in the system shown below conditioning the ash at the site of the landfill, although in this case, the system relies on trucks to transfer the ash to the landfill-based receiving and conditioning facility. In the system shown here, specially modified dump trucks are used to transport the ash. The truck beds have a metal cover, with a fill valve that accepts dry ash from a standard dry loadout spout, like a tank truck. The truck bed is specially modified with hydraulic rams and a fully gasketed tailgate to stay tightly closed and prevent leaks during transit.
Arriving at the conditioning facility, the truck backs up to a special receiving hopper (left) covered and equipped with a high-efficiency fugitive dust collection system, releases the hydraulic gate control and dumps the ash into the hopper. Ash is transferred by screw conveyor to a bucket elevator which feeds the conditioner. The conditioned ash is discharged to a bunker or on-grade and moved by loaders and dozers for placement and compacting.
The variants of this system include an option to use traditional tank trucks to transport ash to the landfill site, with the addition of a silo to this type of unit instead of the receving hopper for dump trucks.