STERAPORE 5600 Series (FF) Instruction Manual
26/59
3-2-1
Device and Equipment Design
●
Chemical tank (NaClO storage tank)
This is a tank used to store chemicals (NaClO). NaClO is corrosive.
■
Design example
Tank capacity: The amount used in 1 to 2 months (calculated including maintenance cleaning and
recovery cleaning)
Tank material: PE, FRP, etc.
Installation location: Indoors, or a shaded, well ventilated location.
■
Example of a calculation for the amount of NaClO used in 2 months per 56M0800FF unit
Assume that the concentration of undiluted NaClO solution is 12 % and that its specific gravity is 1.19.
Maintenance cleaning
800 m
2
× 2 L/m
2
× 500 mg/L ÷ 12 % ÷ 1.19 g/cm
3
× once/week × 8 weeks/2 months = 45 L
Recovery cleaning
800 m
2
× 2 L/m
2
× 3,000 mg/L ÷ 12 % ÷ 1.19 g/cm
3
× once = 34 L
The total of the above is 79 L.
Take into account loss equivalent to the guide pipe capacity when choosing a chemical tank.
●
Dilution water tank
This is a tank used to store the dilution water for NaClO.
■
Design example
Dilution water: Tap water, membrane treated water, etc.
Tank capacity: Must be greater than or equal to the amount required for a single cleaning cycle
Supply method for dilution water: Automatic.
■
Example of a calculation for the amount of NaClO used per 56M0800FF unit
800 m
2
×
2 L/m
2
= 1.6 m
3
(Tank capacity: 1.6 m
3
+ guide pipe capacity
⇒
2 m
3
)
WAR N I N G
The following are not suitable for use as dilution water.
・
Treated water which has a high residual ammonium concentration:
NaClO reacts with ammonium to become chloramine, reducing NaClO activity.
・
Water with a high concentration of polyvalent metal ions such as iron and manganese ions:
It reacts with NaClO to precipitate solid content in the membrane.
●
Washing tank
This is a tank in which modules are immersed in chemical soak cleaning.
■
Design example
Capacity: Large enough and deep enough to accommodate several modules at one time.
●
Chemical pump
This is a pump used to deliver NaClO from the chemical tank.
■
Design example
Pump type: A variable meter pump. The chemical pump may be shared for maintenance cleaning and
recovery cleaning. In this case, choose a pump based on the flow rates for both.