# Development of Chemical Precipitation Purchased Equ ipment

Costs: Mixers

The following telephone contact report supports EPA’s deve lopment of purchased equipment cost equations for mixers by documenting EPA's communication with a vendor re garding purchase costs for mixers used in the

Steam Electric cost model.Project No.: 0172.08.029.044 DISTRIBUTION

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Project Name: Steam/Cost/Compliance Modeling

TELEPHONE CALL RECORD

Outgoing Call Date: 04/5/2011 Time: 10:20 am 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 c hemical precipitation wastewater treatment system.

TOPICS DISCUSSED AND ACTION TAKEN

On April 5, 2011 at 10:20 am I contacted Mr. Reed O’Neal. I e xplained to Mr. O’Neal that we are working on conceptual level costing of a chemical precipitation wastewater treatment system to treat FGD (flue gas desulfurization) wastewater from steam electric power plants, and as a part of this project we are trying to collect cost information on different components or unit s of a chemical precipitation system.

I told Mr. O’Neal that we would like to obtain purchase c osts (including ancillary equipment), power requirements and any available marketing material or broc hures for mixers to be used in equalization tanks, reaction tanks, sludge tanks, and lime slurry preparation t anks. I told Mr. O’Neal that the wastewater flow rate s for the systems may range from 7 gpm for the smallest plant to 700 gpm for the largest plant. I told Mr. O’Neal that I did not have details for each type of mixer but I h ad an example for one plant. Mr. O’Neal asked for the details via email and indicated he would provide costs. I ema iled 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 ca rbon steel coated in rubber. Mr. Hibshman provided the following costs:

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Equalization tank mixer $60,000

Reaction tank 1 mixer $15,000

Reaction tank 2 mixer $22,000

Sludge tank mixer $15,000

Lime slurry prep tank mixer $4,000

I asked Mr. Hibshman how to extrapolate these costs ac ross the industry. Mr. Hibshman indicated that the cost primarily depends on horsepower and speed which are used to cal culate 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 s ize is typically one-quarter to one-third the size of the tank d iameter. I told Mr. Hibshman that we had the sizes of the tanks that correspond to the mixers he costed. He indicate d that one way to estimate the costs is to calculate t he 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 this value should be approximately 0.15 to 0.2 in-lb/gal. Using the cost per unit tor que and the torque per unit volume, I can

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