25
reference. When put in practice, it is subject to the different requirements of raw water
hardness and application.
3.4.Parameter Settlement
① Service TimeT1
Water Treatment Capacity: Q=V
R
×K÷Y
D
（m
3
）
Hardness of inlet water, mmol/L.
Exchange factor, mmol/L, 400 ～ 1000.
Down-flow regeneration, take 400～750；
Up-flow regeneration, take 450～1000. If
the inlet water hardness is higher, the
factor is smaller.
Resin volume，m
3
.
By hours：T1=Q÷Q
h
（Hour）
Average water consumption per hour ( m
3
/h )
Water treatment capacity（m
3
）
By days： T1=Q÷Q
d
（Day）
Average water consumption per day (m
3
/d)
Water treatment capacity (m
3
)
② Backwash Time T2
Generally, it is suggested to set 10～15 minutes. The higher the turbidity is, the longer
backwash time shall be set. However, if the turbidity is more than 5FTU, it is better to install
a filter in front of the exchanger.
③ Brine& Slow Rinse Time T3
T3=(40～45)×H
R
（min）
Generally, T3=45H
R
（min.）
In this formula, H
R
——The height of resin in exchange tank (m).
④ Brine Refill TimeT4
T4＝0.34×V
R
÷Brine refill speed
In this formula, V
R
—— Resin volume (m
3
).
⑤ Fast Rinse Time T5
T5=12×H
R
（min.）
Generally, the water for fast rinse is 3～6 times of resin volume. It is suggested to be
set 10～16 minutes, but it should meet the requirements of qualified outlet water.
To Next Page
Loading...
