Development of Chemical Precipitation Purchased Equipment Costs:

Chemical Feed Systems

Purchased Equipment Costs are the sum of the following cost elements:

(1) Pump Costs

(2) Tank Costs

(3) Chemical Feed System Costs

(4) Mixer Costs

(5) Clarifier Costs

(6) Filter Press Costs

(7) Sand Filter Costs

This Excel workbook consists of the following worksheets:

Summary

Calculations

Silo Volume

Legend

Blue cells contain automatically calculated values.

Presents the relationship between total feed system cost and silo size. Since the maximum 

storage requirement required 4 large silos and costs were provided on a per silo basis, EPA 

interpolated costs for the storage requirement associated with 1, 2, and 3 large silos shown 

in rows 4-6.

Each cost component includes the cost of freight and associated ancillary equipment such as piping, valves, and 

controllers.

This Excel workbook supports EPA's derivation of cost element (3) using information provided in response to the Steam 

Electric Survey and vendor data.

The following worksheets support EPA's determination of lime feed system costs. Expected flow rates and dosage rates 

were used to calculate the range of silo sizes needed to store the required amount of lime. The vendor then provided cost 

estimates for the minimum and maximum expected storage requirements including the quantity of silos.

Presents a summary of the maximum values calculated in the Calculations tab.

Calculates the minimum and maximum expected storage requirements for lime based on 

flow rate and dosage.

CBI DATA: Yellow cells contain dosage data calculated based on CBI survey responses.
 Since the maximum 

 a per silo basis, EPA 

d 3 large silos shown 

 valves, and 

ponse to the Steam 

es and dosage rates 

or then provided cost 

s for lime based on 

 survey responses.
Summary sheet (calculations on next tab)

Max

Lime Dosage, g/min [Redacted]

10% Lime Slurry add'n rate, gal/min [Redacted]

Lime Storage*, cu ft [Redacted]

*Assumes 15 day storage
Min Max Densities kg/L

Flow rate, gpm 30 1500 Lime 0.5

Lime Dosage, g/L [Redacted] [Redacted] Water 1

10% lime slurry 0.95

30 gpm Min Max

Lime dosage rate, g/min [Redacted] [Redacted]

Lime flow rate, gal/min [Redacted] [Redacted]

Water dosage rate, g/min [Redacted] [Redacted]

Water flow rate, gal/min [Redacted] [Redacted]

Lime slurry flow rate, gal/min [Redacted] [Redacted]

1500 gpm Min Max

Lime dosage rate, g/min [Redacted] [Redacted]

Lime flow rate, gal/min [Redacted] [Redacted]

Water dosage rate, g/min [Redacted] [Redacted]

Water flow rate, gal/min [Redacted] [Redacted]

Lime slurry flow rate, gal/min [Redacted] [Redacted]

Lime supply 15 day 30 day 15 day 30 day

30 gpm, kg [Redacted] [Redacted] [Redacted] [Redacted]

30 gpm, gal [Redacted] [Redacted] [Redacted] [Redacted]

30 gpm, cu ft [Redacted] [Redacted] [Redacted] [Redacted]

1500 gpm, kg [Redacted] [Redacted] [Redacted] [Redacted]

1500 gpm, gal [Redacted] [Redacted] [Redacted] [Redacted]

1500 gpm, cu ft [Redacted] [Redacted] [Redacted] [Redacted]

Min Dose Max Dose
Conversion factors Lime slurry concentrations (by weight)

g/kg 1000 Lime 10%

L/gal 3.78 Water 90%

min/day 1440

gal/cu ft 7.48
Storage volume, cu ft Silo qty Per Feed system cost, $ Total Feed Systems Cost, $

600 1 $ 230,000 $ 230,000

37250 4 $ 330,000 $ 1,320,000

9312.5 1 $ 330,000 $ 330,000

18625 2 $ 330,000 $ 660,000

27937.5 3 $ 330,000 $ 990,000

y = 0.0004x2 + 17.487x + 193013

R2 = 0.9934

 $-

 $200,000

 $400,000

 $600,000

 $800,000

 $1,000,000

 $1,200,000

 $1,400,000

 $1,600,000

0 5000 10000 15000 20000 25000 30000 35000 40000

T

otal Feed Systems C

ost, $

Storage Volume, cu ft

Total Feed Systems Cost vs. Storage Volume