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HomeMy WebLinkAboutItem #05 Wastewater Treatment Plant Mixer Motor and Gear Box #1 and #3 Replacement 4 tie Center of Good Li oz AGENDA ITEM COVER SHEET Meeting Date: May 1, 2012 Item # Reviewed By: Contact Name: Charles K. Smith, P.E. Department Director: Charles K Smi ■ Contact Number: 407 - 905 -3159 City Manager: Robert Frank Subject: Wastewater Treatment Plant Mixer Motor and Gear Box #1 and #3 Replacement Background Summary: The City of Ocoee Wastewater Plant utilizes I. Kruger's BioDenitro process to remove BOD (biological oxygen demand) through two parallel oxidation ditches (concrete conical tanks), working in alternating oxic and anoxic phases. To accomplish the oxidation of the BOD, raw sewage is fed into the tanks and circulated around their perimeter. As treatment levels are reached, flows are discharged to another treatment process. To circulate the flow, each tank has two mixer units which include a motor, transmission and a turban screw. The Utilities Department has scheduled one mixer from each tank to be rehabilitated in this fiscal year within its "Wastewater Treatment Plant Ten Year Maintenance Schedule ". The existing, originally equipped mixer has a 9.0 HP motor, and operates at a degraded efficiency from when it was originally put into service (40.0 %). Kruger now has a newly designed mixer with improvements to its motor (5.6 H.P) and turban screw. The improved mixer operates at an efficiency of 56.0 %, 40% higher than original operating efficiency of the existing mixer. The redesigned turban screw produces a more balanced laminar flow regime, leading to higher treatment levels and more efficient scouring (cleaning) of the tank. The older mixer has limited parts availability. Based on a mixer being in operation 7 hours a day, replacing the mixers would lead to an annual savings of 8687 kilowatt- hours, and the new mixers' more even flow would lead to higher treatment levels. Staff has piloted a test of one of the new mixers; and Kruger has offered a discounted price on the pre- tested mixer, with full warranty. Mixer installation will be completed by Utilities personnel. Issue: Should City Commission authorize the City Manager to procure two new oxidation ditch mixers in lieu of rehabbing the two existing mixers? Recommendations Motion to authorize City Manager to procure two newly designed mixers, one (1) new and one (1) previously tested unit, for the oxidation ditches at the Ocoee Wastewater Plant from I. Kruger, Inc., in the amount of $36,702.92, which includes a $500.00 freight contingency (not included on the quote). Attachments: Proposals from I. Kruger, Inc., letter on Cost and Energy Savings Financial Impact: The new mixer costs $20,989.11, which includes an estimated $150.00 freight allowance, and the discounted mixer is being offered for $15,213.81 for a total of $36,202.92. In the past, freight (as parts and equipment come from Denmark via ocean freight) has exceeded its allowance and staff is requesting an additional $500 for contingency, making the final amount for approval $36,702.92. Included in the Fiscal Year 2012 budget is 1 4 the rehabilitation of the mixer motors and gear boxes #1 and #3, scheduled at an amount of $12,000 each. The additional funds needed for this job, $12,702.92, will be taken from fund 407, Wastewater R &R Emergency Repair Funds. The more efficient mixers will lead to an energy savings of $1,216.00 per year. Type of Item: (please mark with an x') Public Hearing For Clerk's Dept Use: Ordinance First Reading X Consent Agenda Ordinance Second Reading Public Hearing Resolution Regular Agenda X Commission Approval Discussion & Direction Original Document/Contract Attached for Execution by City Clerk Original Document/Contract Held by Department for Execution Reviewed by City Attorney N/A Reviewed by Finance Dept. "46— N/A Reviewed by ( ) v N/A 2 f R t ' ICRUGiE• . QUOTE QUOTE NO. 031212 I. KRUGER INC. Veolia Water Solutions & Technologies DATE: 3/12/2012 148 Rupert Rd EXPIRATION DATE: 4/12/2012 Raleigh, North Carolina 27603 USA This quote is valid for 30 days PHONE 888.578.4378 FAX 919.661.4568 EMAIL: krugerinccustomerservice @veoljawater.com TO Contact Name: Tom King FROM: J. Bryan Hewitt Company: Ocoee WWTP After Market Sales Manager Address: 1800 AD Mims Rd brvan.hewitt@veoliawater.com Ocoee, FL 34761 CELL 919 - 349 -1616 Phone: 407.905.3100 x94301 Email: tking @ci.ocoee.fl.us SALESPERSON JOB PAYMENT TERMS DELIVERY TERMS DELIVERY SCHEDULE JBH Kruger Ditch Net 30 Days F.O.B. Prepaid 0 Add 14-16 wks-ARO Destination QTY PART NUMBER AND DESCRIPTION UNIT PRICE I LINE TOTAL NOTE: The attached Kruger Quotation is for Parts Only. The pricing is expressly contingent upon the items in this quotation & are subject to I. Kruger Inc. Standard Terms of Sale for Parts Orders as detailed herein. No add'I terms contained within Owner's and /or Engineer's Plans & Specifications shall apply to nor become a part of this Quote Submersible Mixer Model TR 216.72 -4/8 for Installation with Lowering Device AVMSH, Maxiprop Mixer with Two Stages Planetary Gearbox, GFK Propeller; Driven by Electric Motor T 17- 4 /8REx, 5.6 HP, 460V, 3 Phase, 60 Hz, Class F Insulation, NEMA B Design; Thermal Sensor, Mositure 1 Probe; 10 Meters Power and Control Cable, Size: NSSHou -J 7x1,5 mm2; $20,839.11 Ceram CO Coating for Mixer; Assembled with Binder - Bracket for Fishing, Frame M2/100 w/ modified slide console to fit existing Landia mast 1 i QUANTITY CHANGES WILL EFFECT FINAL COSTS SUBTOTAL, $20,839.11 ALL PRICES SUBJECT TO COST AND AVAILABILITY AT TIME OF ORDER. PRICES QUOTED ABOVE DO NOT INCLUDE SHIPPING, BROKERAGE, ESTIMATED FREIGHT $150.00 CUSTOMS DUTIES & FEES, START UP SERVICES, APPLICABLE TAXES. SALES TAX Exempt MINIMUM ORDER $50.00. TOTAL $20,989.11 O VEOUA WATER Karam . naow,x PLEASE NOTE: Quotation prepared by: A signed Quotation is required to process order. If you submit a PO, please reference To accept, sign here and return *: Kruger's Quotation number to process order. TRAM( YOU FOR YOUR al MINUS( I Kruger Inc. — Standard Terms of Sale — Parts Only Orders (Rev. 1/42010) FOLLOWS VEOLIA WATER seuam IY 7..40 KRUGER QUOTE QUOTE NO. 021512 I. KRUGER INC. Veolia Water Solutions & Technologies DATE: 2/15/2012 401 Harrison Oaks Blvd., Suite 100 EXPIRATION DATE: 3/15/2012 Cary, North Carolina 27513 USA This quote is valid for 30 days PHONE 919 - 677 -8310 DIRECT 919 - 653 -4521 FAX 919 - 677 -0082 TO Contact Name: Tom King FROM: J. Bryan Hewitt Company: Ocoee WWTP After Market Sales Manager Address: 1800 AD Mims Rd bryan.hewitt@veoliawater.com Ocoee, FL 34761 CELL 919 - 349 - 1616 Phone: 407.905.3100x4301 Fax: 407.656.7416 SALESPERSON JOB PAYMENT TERMS DELIVERY TERMS DELIVERY SCHEDULE JBH Kruger Ditch Net 30 Days F.O.B. Prepaid Et 12 -14 wks -ARO Destination QTY PART NUMBER AND DESCRIPTION UNIT PRICE LINE TOTAL * NOTE: The attached Kruger Quotation Is for Parts Only. The pricing Is expressly contingent upon the Items In this quotation & are subject to I. Kruger Inc. Standard Terms of Sale for Parts Orders as detailed herein. No add'I terms contained within Owner's and/or Engineer's Plans & Specifications shall apply to nor become a part of this Quote 1 TR215.53 4/12 HP 460v Mixer w /33ft Cable $15,213.81 Thermal Sensor Mixer Frame M2/100 Mixer Frame Cable Guides Ceram CO Coating on Mixers * ** *DISCOUNTED AS THIS IS A USED TRIAL MIXER * * * ** ' QUANTITY CHANGES WILL EFFECT FINAL COSTS SUBTOTAL! $15,213.81 ALL PRICES SUBJECT TO COST AND AVAILABILITY AT TIME OF ORDER. PRICES QUOTED ABOVE DO NOT INCLUDE SHIPPING, BROKERAGE, ESTIMATED FREIGHT TBD CUSTOMS DUTIES a FEES, START UP SERVICES, APPLICABLE TAXES. SALES TAX Exempt MINIMUM ORDER $50.00. TOTAL 1 $15,213.81 PLEASE NOTE: Quotation prepared by: A signed g Quotation is required to process order. If you submit a PO, please reference To accept, sign here and return *: Kruger's Quotation number to process order. THANK YOU FOR YOUP BUStNEW 1 Kruger Inc. — Standard Terms of Sale —Parts Only Orders (Rev. 1/4/2010) FOLLOWS ©VEOLIA WATER twm. 4 nexNw. KROGER I. Kruger Inc. 401 , Hanison 27513 Oaks Blvd TELEPHONE 919.877 -8310 Ste. 100 FACSIMILE 919 -877 -0082 Cary, NC 27513 3/12/2012 To: Tom King Operations Supervisor City of Ocoee WWTP Ocoee, Florida We are sending this letter to address the cost and energy savings that you will receive from the submerible Mixer you are interested in. The existing Mixer(s) you are looking to replace are 9.0 horsepower and well over 10 years old. They consist of what is known as a labrynith sealing system consisting of a number various seals that are considered "wear" parts which need to be replaced just about every six months of service along with bi- annuakl oil changes. These seals are also very expensive. The new Mixer is only 5.4 horsepower and because of the aggressive pitch of the blades you will enjoy better mixing with less power consumption. You will also notice the flow is increased in the ditch. This Mixer consists of one mechanical seal behind the propeller and one at the motor outputshaft, that's it. Also the required oil changes are once after three months of break in, then once a year after that. Because of the material construction and pitch of the propeller these units will not allow debris to accumulate on the propeller. If there is any other information you may need to assist in your decision, please feel free to contact me. ( J. Bryan Hewitt Aftermarket Sales Manager 1. Kruger, Inc. 401 Harrison Oaks Drive Cary, NC 27513 Main Phone: 919 - 677 -8310 Direct Dial: 919 - 653 -4521 Fax: 919 - 677 -0082 Cell: 919 -349 -1616 www.krugerusa.com Email: bryan.hewitt@veoliawater.com www. veoliawatersystems VEOLUA WATER Solutions & Technologies