Iron removal filters (FUZH)

Iron removal filters (FUZH) are designed to remove iron, manganese and hydrogen sulphide from water. Iron removal filters are used in the process of industrial and drinking water treatment.

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Filter description: Iron removal filters are designed for removal of Fe2+ ions, poorly soluble Fe3+ ions, manganese and hydrogen sulphide. Iron removal filters are used in the process of industrial and drinking water treatment.

 

Iron removal filters (FUZH)Iron removal filters (FUZH)

The following filtering materials are used in the iron removal filters: manganese-rich rocks; crushed moulding forms, artificial alumina silicates, ready-made hydro-anthracite, non-activated co-polymer of styrene and divinylbenzene.

 

Design description: Iron removal filters' design is close to sorption carbon filters (FSU) and fit for application with a wide range of sorption and sorption-catalytic filtering materials. Iron removal filters consist of:

  • vessel;
  • pressure-relief valve;
  • top and bottom distribution assemblies;
  • piping;
  • shut-off valves;
  • sampling station.

 

FUZH filter has cylindrical vessel made of welded sheet steel and equipped with welded elliptical pressed bottoms. The lower bottom has three welded legs to mount the filter on a foundation.


Upper and lower bottoms have centrally welded flanges for external connection of piping and internal connection of distribution assemblies (bottom and top).


Top drainage distribution assembly of "disk overflow" type, bottom drainage distribution assembly of "false bottom" type with stainless or plastic slotted caps (FEL) are most commonly used in the iron removal filters.

 

Operation principle: FUZH filter cycle includes following stages:

  • adsorption and catalytic oxidation (filtration);
  • loosening;
  • backwash;
  • regeneration (reduction) of the filter bed (deferrization catalyst);
  • discharge of the primary permeate water.

 

The incoming pressurized flow goes to the hydraulic mixer chamber and is mixed with an oxidizer, and then the flow is directed towards the upper drainage distribution assembly, spreads evenly and passes through the filtering material downwards. The removed poorly soluble impurities are absorbed by the filter bed's particles and films of the generated non-soluble iron hydroxide (Fе3+) with further oxidation of iron ions (III), manganese and hydrogen sulphide. The permeate water is discharged through the lower drainage distribution assembly into the collecting receiver.

 

The impurities absorbed by the filtering material go through a full-oxidation process with the films (flakes) aggregation. The excess air accumulated during oxidation of the incoming flow is relieved through a pressure-relief valve located on the aeration column or on the filter's top.

 

These filters perform regeneration of the adsorbent capacity of the absorbent-catalyst or any other specific filtering material by means of a backwash with clean water or treatment with special solutions. When the filter run is complete, FUZH filter is stopped, disconnected from main process pipes, and the cleaned water is supplied upwards to perform backwash. The backwash water is discharged to the drainage. To improve efficiency of the backwash and speed up the regeneration of catalyst capacity the filtering material is loosened from bottom to top with compressed air. In some technologies regeneration solutions are applied to regenerate the filtering materials.


When the backwash is complete and filtering material’s capacity is regenerated the filter is put in operation or kept in standby mode. Right after the filter is put in operation the first volume of permeate water is discharged to the drainage.

 

Additionally, to ensure operation efficiency, these filters require auxiliary equipment for pre-treatment of the incoming flow by one of the oxidizers (oxygen of dissolved air, ozone, sodium hypochlorite (NaClO), potassium permanganate (KMnO4)). This equipment includes a hydrodynamic mixer or aeration column, if no hydraulic mixer is available. An air-compressor may be used for the processes, where air oxygen is used as an oxidizer.

 

The operation cycle is over when one of the set parameters is met: inlet-outlet pressure differential is increased (according to pressure gauge reading) or certain amount of the permeate water of the required quality is obtained.

 

The operation cycle is finished when one of the filtrate's permissible concentration (iron, manganese, hydrogen sulphide) parameters is exceeded and/or pressure differential upstream and downstream of the filter is above 0.3 MPa.

 

Product line and specifications of iron removal filters (FUZH)

 

Filter type
Diameter, mm
Capacity,
m3/hour
Operating pressure,
MPa
Height, mm
Filter weight, kg
FUZH-1,0-0,6
1000
11
0,6
2750
700 
FUZH-1,4-0,6
1400
21
0,6
2900
1250
FUZH-1,5-0,6
1500
24
0,6
2950
1250
FUZH-2,0-0,6
2000
43
0,6
3430
2000
FUZH-2,6-0,6
2600
70
0,6
3850
4100
FUZH-3,0-0,6
3000
93
0,6
4250
4450

 

 

Our filters are manufactured in compliance with TU 3113-003-04688393-05 "Water-treatment filters for heat and power plants and industrial energy sector", efficient from July 1st, 2005.

 

To learn more about iron removal filters (FUZH) or place an order, please, phone us: +7 (8482) 20-83-61, 20-85-90 or write to our e-mail: info@teko-filter.ru.