Debris Filter

Debris Filter

Debris Filter for Condenser, Heat Exchanger, and Tower Protection:

The WTR debris filter is vital for the prevention of macro-fouling from debris in cooling water circuits. Debris filters are used in all types of applications where macro fouling of the condenser, heat exchanger, or cooling tower may occur and protection of downstream equipment is essential.

Macro-fouling (coarse debris in the flow such as carry-over from traveling screens, trash, leaves, weeds, shells, marine life, etc.) can blind the condenser / exchanger or other critical equipment, thus losing cooling flow or creating a high differential on downstream equipment. This may result in shut downs, manual removal of debris in confined spaces, rodding out of tube sheets or other costly and laborious cleaning methods. 

The WTR debris filter utilizes the existing system's own pressure to self-flush when required. When debris fouls the filter element, this creates a higher differential. The integrated differential transmitters detect this rise in differential pressure and initiate a cleaning cycle. When the cleaning cycle is initiated, the discharge valve will open. Since the system line pressure is greater than the discharge line pressure, a reverse pressure, or vacuum is created. The rotor drive cycles the backwash rotor over the face of the filter element and debris is vacuumed through the backwash rotor and out the debris discharge line. Debris is routinely conveyed to the plant main discharge or to secondary strainers for separation. 

The debris filter is housed in a filter shell, flanged to mate with the cooling water lines. Custom lengths, flanges, and arrangements are common (i.e. within an elbow or downstream of pumps). The debris filter utilizes an HMI touchscreen control interface, allowing for easy monitoring. Individual or multiple filters may be controlled from a common panel. Other options such as plant DCS control is available. Controls and drives can be supplied for hazardous locations.  

WTR Engineering, LLC, is a wholly owned subsidiary of WesTech Engineering, as of April 1, 2017. WTR designs and supplies mechanical water filtration equipment, such as raw water and wastewater screening for large flows, for both the municipal and industrial markets, including the power industry.


Features

  • Filter element provides superior filtration area with minimal pressure loss across the element
  • Continuous, online, self-flushing without interruption to cooling or process water flows
  • Heavy wall carbon steel filter shell, typically internally rubber lined or epoxy coated
  • Exterior coating per customer requirements
  • Filter shell of standard or customized length for new plant or retrofit into existing
  • Filter element and backwash rotor of 316L SS, Duplex 2205, Super Duplex 2507
  • Discharge valve is normally a full port ball valve or knife gate with internals to match requirements
  • Rotor drive is industrially rated heavy duty unit with reversing capabilities for continuous operation
  • Rotor will automatically reverse if oversized debris is encountered
  • Access manway for removal of unforeseen or oversized debris
  • Advanced controls via HMI touch screen interface with PLC
  • Controls provide instant change of various control settings (times on/off, cycle time, etc.)
  • Controls allow viewing of component status, run times, maintenance requirements, and fault
  • Design codes to ASME, nuclear or petrochemical industry standards
  • Optional emergency by-pass is available                  

Benefits

  • Prevents macro-fouling of condensers and heat exchangers
  • Extends condenser / exchanger life by capturing debris that create hot spots
  • Captures debris carried over from thru-flow screens
  • Helps prevent debris accumulation in cooling tower elements
  • Eliminates sending personnel into confined spaces to remove debris
  • Reduces operating differential across condenser / exchanger from debris accumulation
  • No additional water requirements for back flushing

Applications

  • Power plant raw water (fossil and nuclear)
  • Industrial raw water
  • Petroleum refineries
  • Chemical plants
  • Steel mills
  • Irrigation for water distribution
  • Potable water intakes
  • Water parks
  • Nozzle protection

Specifications

  • Filter element apertures:1/8” to 3/8” (3mm to 10mm)
  • Pipe connection sizes: 24” to 120” (600mm to 3,000mm)
  • Flow rates:10 to 250 K GPM (0.63 to 15.7 m3/sec) depending on aperture

Photos