Technical Information

  • The dry polymer suction tube is translucent to allow observation of the polymer flow.
  • The standard hopper has a 2.7 ft3 (75L) capacity.
  • A hopper screen traps polymer lumps.
  • A hopper vibrator assures consistent polymer flow.
  • The feeder frame and enclosure panels are made of stainless steel. The hopper lid is hinge. Spring loaded arms keep the lid opened or sealed closed.
  • The surface that contact the polymer are made of high density thermoplastics. Their smooth surfaces resist polymer sticking and are easy to clean.
  • The feeder front is a hinged and latched clear acrylic panel. It allows the operator to see the feeder. It also allows access for maintenance and repairs.
  • A dehumidifying air heater provides low humidity air to the hopper and the feeder enclosure.
  • The top of the 2.7 ft3 (75L) capacity hopper is only 33" (84 cm) above grade. It provides a comfortable height without the use of platforms.
  • Proximity, non-contact, capacitance sensors monitor the polymer level on the disc.
  • A low flow switch monitors the dilution water flow to the Polyductor. The feeder operates with dilution water pressure from 40 to 100 psi (2.7 to 6.8 BAR)
  • The feeder runs on 120 VAC. Power consumption is less than 10 Amps.

Available Options

  • A hopper with a 5 ft3 (140L) capacity.
  • Frame with hoist to allow the use of bulk bags.
  • Thermoelectric Air Cooler to condition the air in the feeder enclosure. It is used when the feeder is to be operated in very hot or humid environments. The only moving parts in the TAC are the fans. The TAC consumes less than 100 watts of power.
  • Control packages for filling:
    • Tanks that are placed one over the other and gravity drain.
    • Tanks that are placed next to each other.
    • One tank.
  • Mixing-Aging tanks sized to meet your needs.
  • Solution transfer or metering pumps.
  • Voltages other than 120 VAC.
  • Custom designed to meet your needs.

Polyductor

The EXCELL Polyductor is a high efficiency eductor engineered specially for difficult to handle materials, such as dry polymers. The polyductor generates the high vacuum airflow needed to transport the polymer. Design transport velocity is 3000 ft/min (800 m/min). This velocity assures that the polymer keeps the conveying tube clean, without eroding it.

The polyductor uses the dilution water to generate the transport vacuum airflow, the dilution water is accelerated up to 4000 ft/min (1060 m/min) in a high efficiency nozzle. The high velocity water flow generates the vacuum by entraining air as it exits the nozzle.

The high speed collision between the polymer granules and the water stream assures fine dispersion of the polymer granules. This results in faster hydration and minimizes the required aging time for maximum polymer activation.

The polyductor keeps itself clean. It uses some of the dilution water flow to keep all the surfaces clear of polymer build-up. It is easy to disassemble for inspection.

The dry polymer conveying tube is made of translucent Nylon. It allows the operators to see the polymer flow. The non-stick properties of Nylon allow free flow even in high humidity conditions.

The standard polyductor dilution water flow capacities range from 10 to 80 GPM (40 to 300 LPM). They can transport and hydrate up to 4 pounds/min (2 Kg/min) of dry polymer. The dry polymer can be transported vertically up to 15 feet (5 m) and horizontally up to 30 feet (10 m).

Disc Feeder

The EXCELL Series 7000 dry polymer feeder uses a rotating disc feeder to precisely meter the amount of polymer needed per batch. The disc feeder is a very reliable and accurate method of feeding difficult-to-handle materials like dry polymers.

The polymer flows from the hopper, through a screen onto the rotating disc the standard hopper capacity is 2.7 cu.ft. (75 L ). Larger hoppers are available. The screen traps lumps larger than 3/8" (10mm) in diameter. The adjustable disc speed allows modifying the polymer feed rate. Rates up to 4 pounds per minute (2 Kg/min) are available. A vibrator prevents bridging at the hopper outlet.

PLC control provides improved reliability and operating flexibility. Proximity, non-contact, capacitance sensors monitor the polymer level on the disc. The polymer is suctioned off the disc, up the polyductor. The disc is continuously vacuumed clean, to prevent polymer build- up. The rotating disc feeder is maintenance free. All components are within easy access. The feeder does not need to be disassembled if it ever needs to be cleaned. The front panel is hinged and latched clear polycarbonate. It allows the operator to see how the feeder is working.

A dehumidifying air heater provides low humidity air to the hopper and the feeder enclosure. It maintains the low humidity levels needed for proper polymer flow. The modular design can be adapted for existing or new facilities. Systems are also available that allow the use of semi bulk bags.

Mix Tank Controls

Existing Facilities

Controls can be provided to fully automate existing systems. Control packages include the level controllers and the remote operated transfer valves as needed for your system. The tank level controls sensors are mounted at tank top and communicate to the feeder main control panel. The remote controlled transfer valves can be electrically or pneumatically controlled.

Typical system consists of the following tank level controls:

  • Tank High Level Alarms, these are above fill levels.
  • Tank Low Level Alarms, these are below normal low level.
  • Tank Fill Start and Fill Stop sensors.
  • Tank Agitator Start Level sensors.

New Facilities

The mixing tanks are sized to meet desired system capacity. Tanks can be made of polyethylene, fiberglass, or stainless steel to meet your preferences. The tanks can be arranged on beside the other, or one over the other, depending on tank size and your available room. Tank agitators have low output RPM and are sized for high viscosity solutions. Agitator wetted parts are made of Stainless Steel. The motors are TEFC.

The solution pump is a progressive cavity pump. The pump has speed control to provide the feed range desired. The pump can be locally or remote controlled by a 4-20 mA signal. Secondary dilution systems are also available to further dilute the polymer solution for better mixing with your process stream.

Thermoelectric Air Cooler

The EXCELL Thermoelectric Air Cooler (TAC) is recommended when the feeder is to be used in very hot,humid environments and the polymer requires less than 25% relative humidity. The TAC uses a solid state semiconductor to reduce the moisture of the air flowing into the feeder enclosure.

The TAC reduces the air temperature up to 25o F (14o C). The resulting cool air contains considerably less moisture than ambient temperature air. When the cool air is re-heated in the feeder enclosure, it has a relative humidity less than 15%. The only moving parts in the TAC are fans that remove waste heat and pump the cool air into the feeder enclosure. The TAC is a modular component that is mounted on the side of the feeder enclosure. It is easy to access, and requires minimal maintenance. The TAC consumes very little power. Less than 100 watts are needed to operate the system.