# Development of Chemical Precipitation Purchased Equipment

Costs:

Mixers

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

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

controllers.

The followi ng tele phone contact report supports EPA’ s development of cost element (4 ) by documenting EPA's

communication with a vendor regarding purchase costs for mixers used in the Steam Electric cost model.Project No.: 0172. 08 .02 9 .0 4 4 DISTRIBUTION

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Project Name: Steam /Cost/Compliance Modeling

TELEPHONE CALL RECORD

Outgoing Call Date: 04/5 / 2011 Time: 10:20 a m EST

Company Name: Philadelphia Mixing Solutions Contact Name: Reed O’Neal , Chris Hibshman

Phone No.: ( 717) 832

- 8858 , (717) 832

- 8822

Email address: roneal@philamixers.com

, chibshman@philadelphiamixers.com

Name: Kavya Kasturi ERG

GENERAL SUBJECT: Vendor cost request for mixers for a chemical precipitation wastewater treatment system.

TOPICS DISCUSSED AND ACTION TAKEN

On April 5 , 20 1 1 at 10:20 a m I contacted Mr. Reed O’Neal . I explained to M r

. O’Neal that we are working

on conceptual level costing of a chemical precipitation wastewater treatment system to treat FGD (flue gas

desulfurization) wastewater fr om steam electric power plants

, and a s a part of this project we are trying to

collect cost information on different components or units of a chemical precipitation system

.

I told Mr. O’Neal that we would like to obtain purchase costs (including ancillary equipment), power

requirements and any available mark eting material or brochures for mixers to be used in equalization tanks,

reaction tanks, sludge tanks, and lime slurry preparation tanks. I told Mr. O’Neal that the wastewater flow rates

for the systems may range from 7 gpm for the smallest plant to 700 gp m for the largest plant

. I told Mr. O’Neal

that I did not have details for each type of mixer but I had an example for one plant. Mr. O’Neal asked for the

details via email and indicated he would provide costs. I emailed Mr. O’Neal at 10:48 am on April 5, 2011

.

On April 7, 2011 at 3:30 pm, I was contacted by Chris Hibshman from Philadelphia Mixing Solutions. He

provided me costs for each of the example plant’s mixers. He said the costs included the motor, gear box, shaft

and propeller. Also, he stated that the equipment was carbon steel coated in rubber. Mr. Hibshman provided the

following costs:

\

Equalization tank mixer $60,000

Reaction tank 1 mixer $15,000

Reaction tank 2 mixer $22,000

Sludge t ank mixer $15,000

Lime s lurry p rep t ank mixer $4,000

I asked Mr. Hibshman how to extrapolate these costs across the industry. Mr. Hibshman indicated that the cost

primarily depends on horsepower and speed which are used to calculate torque. He indicated that the impeller

size , shaft and gearbox also impact the cost and these factors are often related to tank size. The impeller size is

typically one

- quarter to one

- third the size of the tank diameter. I told Mr. Hibshman that we had the sizes of the

tanks that correspond to the mixers he costed. He indicated that one way to estimate the costs is to calculate the

torque for each of the example plant’s mixers and then calculate a cost per unit torque based on the costs he

provided. Then he said I should calculate the torque per unit volume and that th is value should be

approximately 0.15 to 0.2 in

- lb/gal. Using the cost per unit torque and the torque per unit volume

, I can

calculate the cost for a mixer based on the volume of the tank.