Removal of micro-compounds

– Waste water

Automatic activated carbon slurry preparation plant for the removal of micro-compounds in wastewater.

Technical specification

• Big bag stand with yoke for hanging big bags lifted by forklift or telehandler.
• Vibrator to break vaults in the big bag.
• Dust-free docking station for the big bag
• Dust filter with extraction fan.
• Tomal multi-screw feeder type 305
  Capacity: Max. 50 kg/h.
  Straight output curve. Dosing accuracy +-1-2 % at constant
  volume weight. Self-cleaning dosing screws.
  Operation: Nord gear motor, 0.25 kW, 230/400V, IP 55.
• Low level switch, type rotating paddle switch, placed in the doser.
• Wetting funnel in stainless steel design, with inspection hatch, inlet, outlet and overflow.
• Water fittings.
• Ejector.
• Exterior surface treatment: Corrosivity class C3

Functional description

A big bag is suspended by a yoke from the stand using a forklift truck or telpher. The docking station is raised by means of a pneumatic cylinder towards the bag outlet where it is connected. The knot of the bag is then opened and the coal powder flows down into the buffer tank and the doser. The dust filter with fan maintains a negative pressure to avoid dusting, and activated carbon is dosed into the wetting hopper where water is added at the same time. The carbon slurry is transported to the dosing point by the jector. Max. 1bar back pressure. When changing the bag, the filter is started and the bag is sucked together before being tied again. A big bag is hung up with a yoke in the stand with the help of a forklift or telfer. The docking station is raised by means of a pneumatic cylinder towards the bag’s outlet where it is connected. The knot of the bag is then opened and the coal flows down into the buffer tank and the doser. The dust filter with fan maintains a negative pressure to avoid dusting, and activated carbon is dosed into the wetting funnel where water is added at the same time. The coal slurry is transported to the dosing point by the jector. Max. 1bar back pressure. When changing the bag, the filter is started and the bag is sucked together before being tied again. This avoids spillage.

Processing capacity

• 5-50 kg/h dry activated carbon (PAC) with a post-dilution of 3-5 m3/h, giving a final concentration of max 1%.

Benefits and advantages

• Very accurate dosing with Tomal’s multi-screw doser, 1-2%.
  Weighing equipment is not required.
• Dust-free operation.
• High quality stainless steel wetting funnel.

Options

• Electrical installation consisting of automatic cabinet in painted design with Siemens PLC.
  Cable installation and test run at Tomal’s factory before delivery.
  Design according to. SS-EN60204-1. Connection voltage: 3 x 400/230 V, 50 Hz.
  Control voltage: 24VDC.
• Buffer tank.
• Mixing tank instead of wetting funnel.
• Big bag stand and dispenser in stainless steel.
• Silo for bulk filling instead of big bag handling.