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DAFi Disolved Air Floatation innovation

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Using micro-bubbles to realize high-efficiency DAFi(Disolved Air Floatation innovation)

     

Bebefit of using KTM in DAF (Disolved Air Floatation)

  • NIKUNI have supplied a unique compact Micro-Bubble Generator, called KTM,contributing to remove contaminant partices with a small amount of chemical aid in the water purifying plant.
  • KTM has a highly precise and sophisticated pumping mechanism that can generate plenty of micro-bubbles by three hydro-dynamic principles: negative pressure sucking both air and water simultaneously from each port; air effectively mixed into water; finally properly producing pressurized air-enriched discharge.
  • The pressurized air-enriched water is transferred into the bottom of the dissolved air floatation tank. Then it makes bubbles sparkling formation spreading and growing up to the water surface and finally form sludge mat. It will be skimmed off.

Applications DAFi
Disolved Air Floatation innovation

  • Production of ultrapure water for semiconductor pocessing, wastewater processing
  • Removes impurities (metal compounds) from well water, industrial water, circulating water
  • Wastewater of food processing plants, kitchens
  • Removes oils and fats (normal hexane) before processing of wastewater
  • Industrial wastewater processing – 1 (removes oils and fats)
  • Removes die-cast mold releasing agents and press lubricating oil from wastewater
  • Industrial wastewater processing – 2 (removes fibers)
  • Removes small fiber scraps from recycled paper manufacturing, yarn-making and dry-cleaning wastewater
  • Chemical and food processing production
  • Recovers crystals, particles and fibers produced in solutions
  • Ponds, lakes, cleaning towers, tanks
  • Removes and cleanses floating matter, precipitation, slime and algae

Characteristics DAFi
Disolved Air Floatation innovation

  1. Simple structure and easy operation. Providing stable micro-bubble water.
  2. Thanks to the KTM superior gas-liquid dissolution capability, high-quality, high-precision micro-bubble water can be obtained.
  3. Large saturation tank is not necessary, the installation footprint can be kept to a minimum. This makes the system optimal for post-production processing and facility renovations.
  4. KTM can automatically draw in air from the atmosphere, so compressor and accessory equipments are not necessary, resulting in low noise and low energy consumption.
  5. Because the only rotational equipment is KTM, there are a few incidents, and maintenance cost is significantly reduced.
  6. A wide range of line-up is available to meet the needs of the customer.

Specifications DAFi
Disolved Air Floatation innovation

Typical Basic Data for KTM Models (50Hz)
Discharge Pressure: 0.4MPa=4kg/cm2=4bar=56PSI, Air/Water discharge Amount Ratio : 8%

1. Close-coupled Type
Motor: three Phase TEFC Indoors motor 200V to 460V, Single-phase(S) 100V to 230V AC available for 0.5kW motor only

Model Wetted Part
Material		 Motor Output
(kW)		 Water Flow Rate Air Flow Rate
L/min m3/h GPM NL/min Nm3/h NGPM
KTM20FD04(S)ZM Cast Iron/SS 0.56 16.6 1.00 4.4 1.3 0.08 0.4
KTM20ND04(S)ZM SS304
KTM25FD07ZM Cast Iron/SS 0.975 25 1.50 6.6 2.0 0.12 0.5
KTM25ND07ZM SS304
KTM32FD15ZM Cast Iron/SS 1.95 50 3.00 13.2 4.0 0.24 1.1
KTM32ND15ZM SS304
KTM40FD22ZM Cast Iron/SS 2.42 80 4.80 21.1 6.4 0.38 1.7
KTM40ND22ZM SS304

2. Cloupling Type

Model Wetted Part
Material		 Water Flow Rate Air Flow Rate Required motor power
L/min m3/h GPM NL/min Nm3/h NGPM kW (HP)
KTM20F Cast Iron/SS 16.6 1.00 4.4 1.3 0.08 0.4 0.75kW(1HP), 2-Pole
KTM20N SS304
KTM25F Cast Iron/SS 25 1.50 6.6 2.0 0.12 0.5 1.5kW(2HP), 2-Pole
KTM25N SS304
KTM32F Cast Iron/SS 50 3.00 13.2 4.0 0.24 1.1 2.2kW(3HP), 2-Pole
KTM32N SS304
KTM40F Cast Iron/SS 80 4.80 21.1 6.4 0.38 1.7 3.7kW(5HP), 2-Pole
KTM40N SS304

3. Cloupling Type (Large flow rate)

Model Wetted Part
Material		 Water Flow Rate Air Flow Rate Required motor power
L/min m3/h GPM NL/min Nm3/h NGPM kW (HP)
KTM50F1 Cast Iron/SS 133

8.0

 35 11 0.64 3 5.5kW(7HP), 4-Pole
KTM50S1 SS304
KTM50F2 Cast Iron/SS 200 12.0 53 16 0.96 4 7.5kW(10HP), 4-Pole
KTM50S2 SS304
KTM50F3 Cast Iron/SS 250 15.0 66 20 1.20 5 11kW(15HP), 4-Pole
KTM50S3 SS304
KTM65F2 Cast Iron/SS 333 20.0 88 27 1.60 7 15kW(20HP), 4-Pole
KTM65S2 SS304
KTM80F Cast Iron/SS 700 42.0 184 56 3.36 15 22kW(30HP), 4-Pole
KTM80S SS304

Typical Basic Data for KTM Models (60Hz)
Discharge Pressure: 0.4MPa=4kg/cm2=4bar=56PSI, Air/Water discharge Amount Ratio : 8%

1. Close-coupled Type
Motor: three Phase TEFC Indoors motor 200V to 460V

Model Wetted Part
Material		 Motor Output
(kW)		 Water Flow Rate Air Flow Rate
L/min m3/h GPM NL/min Nm3/h NGPM
KTM20FD07ZM Cast Iron/SS 0.975 21.7 1.30 5.7 1.7 0.10 0.5
KTM20ND07ZM SS304
KTM25FD15ZM Cast Iron/SS 1.95 41.7 2.50 11.0 3.3 0.20 0.9
KTM25ND15ZM SS304
KTM32FD15ZM Cast Iron/SS 1.95 66.7 4.00 17.5 5.3 0.32 1.4
KTM32ND15ZM SS304
KTM40FD22ZM Cast Iron/SS 2.42 116.7 7.00 30.7 9.3 0.56 2.5
KTM40ND22ZM SS304

2. Cloupling Type

Model Wetted Part
Material		 Water Flow Rate Air Flow Rate Required motor power
L/min m3/h GPM NL/min Nm3/h NGPM kW (HP)
KTM20F Cast Iron/SS 21.7 1.30 5.7 1.7 0.10 0.5 0.75kW(1HP), 2-Pole
KTM20N SS304
KTM25F Cast Iron/SS 41.7 2.50 11.0 3.3 0.20 0.9 1.5kW(2HP), 2-Pole
KTM25N SS304
KTM32F Cast Iron/SS 66.7 4.00 17.5 5.3 0.32 1.4 2.2kW(3HP), 2-Pole
KTM32N SS304
KTM40F Cast Iron/SS 116.7 7.00 30.7 9.3 0.56 2.5 3.7kW(5HP), 2-Pole
KTM40N SS304

3. Cloupling Type (Large flow rate)

Model Wetted Part
Material		 Water Flow Rate Air Flow Rate Required motor power
L/min m3/h GPM NL/min Nm3/h NGPM kW (HP)
KTM50F1 Cast Iron/SS 192

11.5

 50 15 0.92 4 7.5kW(10HP), 4-Pole
KTM50S1 SS304
KTM50F2 Cast Iron/SS 250 15.0 66 20 1.20 5 11kW(15HP), 4-Pole
KTM50S2 SS304
KTM50F3 Cast Iron/SS 300 18.0 79 24 1.44 6 15kW(20HP), 4-Pole
KTM50S3 SS304
KTM65F2 Cast Iron/SS 467 28.0 123 37 2.24 10 18.5kW(25HP), 4-Pole
KTM65S2 SS304
KTM80F Cast Iron/SS 967 58.0 254 77 4.64 20 30kW(40HP), 4-Pole
KTM80S SS304

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