EcoWater ROHD 4000, Руководство пользователя

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ECOWATER
S Y S T E M S
English
42
Table 1. Temperature correction factors
°C TCF (25°C standard) TCF (15°C standard)
5 2,08 1,54
7 1,92 1,41
10 1,71 1,24
11 1,63 1,19
14 1,48 1,04
15 1,42 1,00
16 1,37 0,97
19 1,24 0,88
20 1,19 0,86
25
1,00
0,74
26 0,97 0,71
29 0,89 0,65
30 0,86 0,64
Example :
RO unit 4002
Production flow 0,45 m³/h
Permeate preesure 0,35 bar
Feed pressure 11,7 bar
Temperature 16°C
Net operating pressure = 11,7 – 0,35 = 11,35 bar
Pressure compensated flow rate = 0,45 x 8,6 / 11,35 = 0,340 m³/h
Temperature compensated flow rate = 0,34 x 1,37 = 0,465 m³/h
When the compensated flow decreases by 10% or more or the product TDS increases by 10%, membrane
cleaning should be scheduled.
With aging of the membranes there will also be a gradual decline in production flow. Thus, the age of the
membranes should also be taken into account. In general, there is a loss of production of:
Age Production loss
6 months 7%
1 year 12%
3 years 17 %
4.17 FILTER CARTRIDGES
The supplied filter cartridges have a 5 micron sieve. They must be replaced when the pressure drop across
the filter cartridge exceeds 0.7 bar or if they are discolored. The prefilters are placed to protect the membra -
nes and should therefore be properly checked.
4.18 CHEMICAL INJECTION SYSTEMS
Dosage devices for dosing anti-scalent should be checked regularly for their proper functioning. The dosing
pump can draw air or get contaminated with eg sand particles. These dosages also serve to protect the mem-