ROTARY CASCADING BOILER (RCB)
The rotating drum assembly consists of a cool outer steel shell.
The inner liner contains the lifters, the recycle chutes, and the dams necessary to control the internal solids flow.
The outer steel drum has two steel tires attached which ride on trunnions.
The internal boiler system is installed and can be removed for repairs, if necessary, through the rear breaching.
The flow rate of water through the boiler tubes is approximately 750 gallons per hour.
A control rod passes through the center of the bundle to adjust the position of the solids flow control vane which is driven by a linear actuator.
A fixed plate with penetrations for fuel feed, air intake, recycling chutes, gas startup system, and instrumentation probes, covers the front of the drum.
In operation, the combustor will have a “bed” loading of sand and ash that controls the temperature of the combustion zone, provides heat transfer to the boiler tubes submerged in the cascading bed and heats the incoming combustion air and fuel.
Design Capacity: Unit sizes range from 35 - 120 tons per hour of processed acceptable fuel. Steam pressure of up to 600psi. Steam volumes of 12,000 - 60,000 lbs. per hour. Based on variable conditions, a 75% efficiency is considered a generally acceptable projection.
Test Fuel for Boiler Performance: The fuel will have a Btu/lb of no less than 5,000 Btu/lb.
IDEAL FOR SMALL WASTE TO ENERGY PROJECT
The RCBC consists of a hollow cylinder, which may be single- or multi-compartmental, depending upon the application, rotating at 8 to 20 revolutions per minute. This is considerably faster than the conventional rotating kilns to which it bears a superficial resemblance. The latter generally operate at less than 1 revolution per minute.
The RCBC provides excellent contact between solids and gases by cascading the solids through gases and thereby effecting high rates of heat transfer. Solids can be readily recycled or transferred from one compartment to another and gases can be introduced or withdrawn as desired. This provides great flexibility and allows designs to be optimized for a particular processing operation.
Cascading solids through the surrounding media ensures complex mixing and intimate contact. This provides the mechanism to transfer heat between the substances. For example, desired solid/gas reactions, such as combustion and SO2 absorption, are enhanced by the cascading.
Our technology is patented under US Patents and is held under our Holding company WTE, INC.
We have the exclusive international rights granted to us.
Patents Pending EFS ID 29483879