Nortec DRAABE Pure Water System - Manual (Page 22)

Created: 21.09.2006
Changed: 29.02.2008
Printed: 02.03.2009
page 22 of 59
4. Fundamentals of Planning
The fundamentals of planning described below are theoretical. In practise, the required
humidification will also be influenced by parameters which cannot be identified in this
documentation. In many cases the theoretical values given here must be supplemented or
corrected by values from experience. Our advisors would be glad to assist you with this.
4.1
Planning a Pure Water System
Follow the procedure below when selecting or designing the system:
-
determine the needs for pure water (water for humidification, process water)
-
ascertain data of the water to be treated (drinking water, company network)
-
decide on a pure water system (PerPur 60/120)
-
determine the need for soft water
-
decide which type of water softener to use (AC/SoftCab 25 DR, WSD)
-
determine the need for further devices (e.g. a dosing unit)
4.1.1
Pure Water System with Water Softener of Type AC (Air Humidification)
The following sections contain all the information required for the individual planning steps.
Each step is illustrated with a computational example based on the following system data.
EXAMPLE 1
A DRAABE Pure Water System is to be installed in the paper warehouse of a printing plant
for use by an air humidification system. The following data are known:
humidification rate:
57 kg/h (126 lbs/h).
humidifier type: unitary nozzles, DRAABE TurboFog
raw water:
hardness = 16°dH
conductance = 400µS
IMPORTANT: The water data must be taken with calibrated measuring devices. Use of in-
correct values during planning would have far reaching consequences.