Original Technologies : Fluorine advanced treatment facilities

"Hitachi Fluorine advanced Treatment Facilities" efficiently precipitate the small quantity of fluorine from the drainage treated primarily by the coagulating sedimentation method. The fluorine is precipitated on the surface of the crystallizing materials in the form of apatite . By adoption of this system, the severely restricted level of fluorine can be followed and the crystallizing materials grown through precipitation can be recycled as valuables. The new system will significantly contribute to achieve the zero-emission from any factory.

Mechanism

The primarily treated drainage flows into the reactor together with an additive. This additive functions to transform fluorine into an insoluble compound (fluorine apatite). Then, this compound is brought into contact with the crystallizing materials filled in the reactor. Such insoluble fluorine compound then adheres to these materials. After the fluorine is removed, the treated water is discharged from the top of the reactor and the crystallizing materials grown with the fluorine compound are discharged from the bottom of the reactor on a periodic basis.

Features

• The structure of the equipment is simple, and both initial and operating costs are minimal.
  
  
• Accumulated crystallizing materials can be recycled as industrial raw materials.
  Excess crystallizing materials can be used as raw materials for phosphoric acid chemical for industrial use (which will be taken over by an affiliated manufacturer). Due to emission of a dehydration facility requirements for zero emissions can be satisfied.
  
  
• Easy maintenance
  The facilities can be operated by pH control solely, and thus can be easily maintained.
  
  
• Space saving
  The facilities have a vertical reactor structure so that it can be installed in a narrow space.
  

Treatment Facilities

Lineup of the facilities

Model	Standard quantity of water to be treated (m3/d)	Facilities Dimensions			Installation area(m2)
		Tower diameter(mm)	Overall height(mm)	Amount of crystallizing materials(m3)
HFU-10A	200	1,000	6,500	2	20 (4x5)
HFU-14A	400	1,400	8,000	4	30 (5x6)
HFU-18A	400	1,800	8,000	8	50 (5x10)
HFU-24B	400	2,400	8,000	10	70 (7x10)
HFU-28B	1,200	2,800	8,000	12	80 (8x10)