Environmental Engineering Reference
In-Depth Information
Pressure
Relief
Gas-Flow
Indicator
Downstream
Vacuum
Regulator
Upstream
Vacuum
Regulator
Venturi/
Check Valve
Solution to
Point of
Application
Gas-Flow
Control
Valve
Booster
Pump
Gas
Supply
Water
Figure 3-14
Vacuum-operated solution-feed system
Chlorine Amount Calculation
The following tables and calculators should be used to deter-
mine the amount of chlorine needed for the continuous-feed
method. Chlorine is fed into the water filling the pipeline to
achieve a 25 mg/L dosage.
Use the chlorination chemical amount calculation checklist on
page 28.
❑
The pipeline diameter and length are used to calculate the
volume of the pipeline from Table 3-6.
The number of valves, hydrants, and other appurtenances
determine the number of tablets needed for disinfection of
these items. Usually one tablet for each is adequate.
❑
This method requires that the entire pipeline is filled with
water so the volume of the pipeline is the same as the vol-
ume of chlorination water (Table 3-6)
❑
The amount of chlorine chemical needed for the job comes
from Tables 3-9a and 3-9b, depending on the length and
size of pipe and whether liquid chlorine or sodium
hypochlorite are used. The solution or gas chlorinator feed
rate is determined using the calculators c3-1, -2, -3, -4, -5.
Each calculator equation is for a specific chemical and unit
❑
Search WWH ::
Custom Search