WTR’s Talon Rake (monorail based automatic raking machine) and Bar Screens are one of the most economical means of protecting downstream equipment such as Traveling Screens, Drum Screens or Pumps. Talon Rakes can be used in all types of applications where debris accumulation on the Bar Screens is common and protection of downstream equipment is essential. Applications include power plant raw water (fossil, nuclear, hydro), industrial raw water, storm water, flood control pumping stations, domestic sewage treatment, potable water intake, irrigation and numerous other plant types.
Coarse debris in the flow can overwhelm and damage rotating screens or cause serious pump issues. Logs, branches, leaves, trash and common aquatic vegetation can blind various systems. Talon Rakes are designed to automatically clean bar screens and deposit debris at a designated dump location. The dump location is variable and can be off the deck or some distance away. The raking cycle can be started automatically by either differential control, built in timer, plant DCS or manual initiation. A hand held manual remote control is also provided to accommodate specific area cleaning or unusual debris removal.
Talon Rakes utilize no permanently submerged moving components. Rakes are typically supported by columns (single or double leg) at various locations for adaptation to new or existing sites. This provides a clear deck and allows direct discharge into debris receptacles. On the start signal, the Talon & Carriage will travel to the first cleaning point, clean a specific area, travel to the discharge location, dump and return to the next cleaning point. The process is continuous until all designated areas are cleaned.
HMI touch screen control allows for various areas to be turned on / off for cleaning. Other options such as partial depth cleaning for floating debris or site specific conditions are available with user friendly interface. Controls and Drives can be supplied for hazardous locations.
- Bar Screens are built to site specific channel dimensions; typical single screens are 5ft. (1.5m) to 20ft. (6m) wide. Bar Screens may be individual (fixed or removable) or continuous width with specialized supports.
- Bar Screen materials can be Carbon Steel (galvanized or epoxy coated) or Stainless Steel (304L, 316L, Duplex or other).
- Talon Rakes use no permanent moving components below the deck or in the water. Any maintenance required is performed above the deck.
- Talon Rake heads can be Galvanized, Stainless Steel or Aluminum Bronze (for hazardous areas).
- Support structures (monorail and columns) are typically hot dip galvanized steel. Stainless Steel is also available.
- The Talon Rake uses a dedicated carriage electrification system avoiding windblown festoon loops.
- Talon Rakes provide positive debris retention by mechanical closure eliminating hydraulics and fluids in the water.
- Specially shaped monorail provides higher strength and protection of carriage drive components.
- Advanced controls via HMI touch screen interface with PLC can provide instant change of various control settings (bays on/off, partial depth, etc.), viewing of component status, run times, maintenance requirements and faults.
- Wireless remote control allows manual movement of rake for special debris, loading of debris or maintenance.