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Home My WebLink About16.a. Introduction to the Energy Recovery and Blower Replacement Project IV INTRODUCTION TO THE � ENERGY RECOVERY & BLOWER REPLACEMENT PROJECT DP 7349 Jean-Marc Petit Director of Engineering & Technical Services Board Meeting � June 7, 2018 Condition Assessments/ Replace Aging/ Address Equipment Remaining Unreliable Assets Redundancy Useful life Improve Energy Optimization/ Prepare forWater Exchange/ Efficiency/ Performance/ Future Nutrient Sustainability Water Quality Removal S THERE IS AN INTER-RELATIONSHIP BETWEEN THREE PROJECTS Energy Recovery & Blower Replacement Water Future Exchange Nutrient Removal '04�13 CENTRAL SAN SECONDARY TREATMENT PROCESSES I - - IN-- .. q —14 Toa ;7 ,woe op- 16 i ENERGY RECOVERY AND BLOWER REPLACEMENT PROJECT ELEMENTS NPI Steam Generation New Boiler Feed Water - + Blower _ ' r� -• �� '+ Building? I Steam & z Condensate Piping Px K, 3.IULL 130 �� 1 - Optimize Selector New Diffusers & Piping & Aeration Tank Rehab �+ �� . , _ - Dedicated x. I� Aerated Grit / � Re-Use Blower Building _ " ry _ Blowers for New Blowers? SUB 52 Electrical Upgrades SECONDARY TREATMENT/ELECTRICAL CONSIDERATIONS v SUB 82 Electrical Upgrades t r. A l. X1. Mixed Liquor - t Hydraulic Splitter Box - _ ,�' Rehab Clarifiers SUB 33&34 Add Electrical Upgrades v _ �` - Generator 0. K'mk-bN 0 hill INS PLANNING FOR WATER EXCHANGE PROJECT ELEMENTS �. SUB 82 �� Electrical Upgrades y 20 MGD Water Exchange: .. Biological Nitrogen Removal (BNR) Membrane Bioreactors (MBR), or a. AquaNereda° Granular Activated Sludge + Microfiltration + Split Stream Reverse Osmosis t Ilk - F4 a, - i` � Divert 20 MGD Conventional Activated Sludge PLANNING FOR FUTURE NUTRIENT REMOVAL BACWA LEVEL 1 w� SUB 82 Electrical Upgrades y JI Al. JEW New �I �* Blower a. t Building I A - J CEPT Seasonal Nutrient "- - r y r.l�.•- . . Optimize Selector Removal: New �L , Diffusers & Piping & IV - ' Aeration Tank Rehab K j Re-Use Blower Building " for New Blowers? SUB 52 Electrical Upgrades �' PLANNING FOR FUTURE NUTRIENT REMOVAL BACWA LEVEL 2 SUB 82 v �� " Contaminated Soil Electrical Upgrad Future Nutrient Relocation Future Clarifiers? Removal Tanks `. r- F New Blower k ❑ Building C)o Mdk CEPT 4PC __ D r - Convert to Nutrient Optimize Selector Removal: New Diffusers & Piping & i - rim Expansion? Aeration Tank Rehab r Primary j Re-Use Blower Building "- for New Blowers? SUB 52 Electrical Upgrades PLANNING PHASE PROJECT ELEMENTS TO BE CONSIDERED EElectrical r v Contaminated Soil Upgrades Future Nutrient Relocation Water Exchange Future Clarifiers? Removal Tanks Steam Generation New Boiler Feed Water Blower ❑ Building i Steam & Condensate Piping Mixed Liquor Rehab Clarifiers Hydraulic j _._ Add Splitter BoxGenerator CEPT SUB 33&34 F n Electrical Upgrades y ll, 40 New Diffusers & Piping Ar Optimize Selector & Aeration Tank Rehab _ - Dedicated ot{ 0*. - Aerated Grit Re-Use Blower Building " Primary Expansion Blowers for New Blowers? - r % SUB 52 Electrical Upgrades ELEMENTS OF THE ENERGY RECOVERY • BLOWER REPLACEMENT PRE =DESIGN JEENEL . . Confirm Detailed Condition . . Identify Capacities & Assessments Alternatives Design Criteria Prepare 10% Technical Peer Develop lifecycle Predesign and Review and Costs for Confirm Project Selection of Best Alternatives Cost and Phasing Alternative(s) . gC"i BOILER FEEDWATER & STEAM SYSTEM 1 12 r �:t STEAM SYSTEM IS CRITICAL FOR THE SECONDARY PROCESS Furnace Exhaust pry Waste Wet Induced Scrubber Heat tScrubber Draft JBoilers - Scrubber Water to Primary Steam Piping Effluent Steam Turbine Cake Multiple Blowers J P Hearth Landfill gas Furnaces Electricit Waste St Standby Us r to Plant Heat U m - A/N Tanks Power Boiler St PotableFacility Boiler Feeds: Water MHF Boilers Mixed Liquor Feed Auxiliary Water Cogen Boiler Electricity Meter Cogen Boilers Channels Aux. Boilers from Grid Turbine Final Effluent Ash Channel Handling �� System Natural Gas Meter Future Needs (Nutrient Backup Removal & Electric Water Blower Exchange) -- �4!l9k COMPLEX BOILER FEEDWATER & RETURN CONDENSATE SYSTEM Legend Water Hard Steam _ High Pressure CCWD Return Water Condensate Chemical Ion Feed Cogen Exchange System Boiler Softeners Waste Deaerator Return Heat Steam Condensate ♦ Deaerator m* Storage Users Tank Tank Boilers Low Pressure Auxiliary Return Boilers Condensate 14 BOILER FEED WATER VALVE REPLACEMENT TRIGGERS MAJOR PLANT COORDINATION IN 2018 ➢ Shutdown Aeration Turbines ➢ Transition to Electric Blower h ➢ Shutdown Cogen & WHB (i.e. import PG&E power) s,. ➢ Shutdown Boilers & Boiler ° Z-114W r ` Feed Water System Var+ ➢ Perform Repairs ° } r, ➢ Start-up All Systems ` { Kau _ 15 / • �- 1 - - .nom • ■ ' .� - 41 - ; NNW Steam Driven Boiler �n Steam Piping above Feed Water Pumps Furnace WHB WIC I ` �j Steam Piping in Tunnels Steam Driven Pumps & from SCB to Pump & Other Steam Piping in SCB Blower Building ` ' AERATION SYSTEM 1 a I f r i � a SCHEMATIC FOR AERATION TURBINE-BLOWER SYSTEM O ROOF cSteam — s{7 Relief 0BLOWER ^M Condensate � Vacuum Cooling Water TURBINE 51219 'p. 3WHP (TYPICAL OF 2) r- .,y GOVERNOR VALVE � TEMP AND THROTTLE VALVE— co ALVE M Control Valve BYPASS VALVE TURBINE AIS INLET Relief Valve Check Valve N } TRAPS BYPASS VALVE� I Manual Valve CONTROL J r-� 1 VALVE GLAND SEAL CONDENSER BYPASS — P&B BUILDING GROUND LEVEL FLOOR RELIEFS DISCHARGE SILENCER STRAINER WEIGHTS D COOLING SEPARATOR-PURIFIER 75115 CONDENSER 51104 FROM WATER CONDENSER 2 STEAM HEADERS 3WHP TO VACUUM SUB-COOLER HOT HOGGER PUMP 51113 WELL CONDENSATE VIA TRAPS CONDENSATE TO DEAERATOR TO 2W VIA SUMP TO VIA HIGH PRESSURE ATMOSPHERE RETURN TANK RETURN CONDENSATE (7IN SCB SYSTEM w COOLER 19 P&.B BUILDING LOWER LEVEL FLOOR VACUUM PUMP 51110 HOTWELL PUMP 51107 Steam Turbine Blowers Electric Blower i� Lik� S � •!y_�..� � --�—�.... ! �®� � fid .--- `tel -4 Piping, Pumps, etc. for Air Piping associated w/ Steam Turbine Blowers - Electric Blower NOW.. -Aft go- low kj w ISSUES WITH STEAM 8c ELECTRIC BLOWER Issues: 1. Reliable Parallel Operation - Existing steam-driven blowers (r%"65,000 scfm ea . ) don't operate reliably in parallel, nor in parallel w/electric blower ("-A5,000 scfm) 2.Turndown - Each steam-driven blower sized for peak air demands but do not have adequate turndown for low air demand conditions ( i.e. triggers use of air waste valve) 3. Redundancy - Electric blower is a backup for emergencies and undersized for full range of air demands, no redundant second electric blower 1 x Ak -' Central ;antra C A/N Tanks ' � Sanitar+ ,Cistrlctti I`- - ti � _r Final Effluent . Aeration . i Channel Pump and Piping Blower _ ir Building ' t �4 PO str G mitral Contra.Cpstaj .rs11 Itary Dtstribt office PRE = DESIGN 1 a 23 f - DRAFT LIST OF PRE -DESIGN TEr- WNICAI . MEMORANDA • Tech Memo I - Condition Assessment of Energy System & Aeration/Secondary Systems 'ch Mems ' - Condition Assessment of Electrical & Instrumentation Systems ech Memo - Design Criteria Development & Improvements to Meet Current & Future Nutrient Regulatory Requirements Bch Mems. - Business Case Analysis for In-Kind Replacement & Other Alternatives • Tech Memo 5 - Business Case Analysis for Water Exchange Alternatives • Tech Memo 6 - 10% Pre-Design Report ' 24 DRAFT PROJECT SCHEDULE 2018 - A, Gm4mmm Internal Kick-Off Meeting March 29 Draft RFP Internal Distribution 0 May 23 Project Introduction to E&O Committee May 7 Project Introduction to Board *June 7 RFP Advertisement * June 8 RFP Submittal Deadline July 13 Interview & Consultant Selection August 7 Presentation to E&O Committee August 13 Presentation to Board September 6 Notice to Proceed for Consultant Late September Planning and Pre-Design September 2018 - February 2020 45L125 STIONS . 1 a 26