Tenders Are Invited For Mechanical Engineering Installation Works – Renewal Of Compressor B50

Mechanical Engineering Installation Works – Renewal Of Compressor B50. 1. Description Of The Initial Situation (Current State): The Nuremberg Urban Drainage And Environmental Analysis (Sun) Operates Sewage Treatment Plant 1 And Sewage Treatment Plant 2 To Treat The Resulting Wastewater. The 2-Stage Biological Purification Stage Of Sewage Treatment Plant 1 Consists Of A High-Load Aeration With Oxygen And A Conventionally Aerated Low-Load Aeration (Slb). Oxygen Is Introduced Into The Slb Via Membrane Aerators. The Aeration Of The Aeration Tanks 1 To 4 (Bb 1 To Bb 4) Is Carried Out Via 10 Turbo Compressors (Make Linde, Built In 1972). The 10 Compressors Are Connected To The Dn 900 Collecting Line, Which Leads To The Aeration Tanks Bb 1 To Bb 4, Via A Supply Line On Which The Start-Up Relief Is Also Mounted. A Butterfly Valve Is Installed At The Transition To The Manifold. The 10 Compressors Each Stand On A Concrete Foundation. The Supply Air Is Drawn In From An Intake Duct Under The Compressors In The Basement. The Compressors Are Also Equipped With Oil Cooling. 2. Description Of The Task (Target Condition): The Plan Is To Install 8 New, Energy-Efficient Compressors (Make Sulzer, Type Hst 30-58-8-300) In The Blower Station In The Area Where The Existing Existing Compressors (Linde Compressors) Are Parked. In Addition, The Respective Pipe Connection To The Existing Manifold And The Supply Air Ducts For The Compressors Must Be Replaced. The Interface For Connecting The Pressure Line To The Manifold Is The Dn 350 Butterfly Valve, Which Also Needs To Be Replaced. The Supply Air Interface For All Compressors Is The Intake Filter, Which Is Located In The Intake Duct On The First Basement Floor And Is Connected To The Compressors Via A Pipe Running Through The Ceiling. The Intake Filter And The Intake Silencer Installed In The Intake Pipe On The First Basement Floor Must Also Be Replaced. Furthermore, The Waste Heat From The Compressor Motor Is Dissipated To The Outside Via A Newly Constructed Exhaust Air Duct. 3. Schedule: The Compressors Must Be Replaced One After The Other So That The Biology Of The Wastewater Treatment Plant Must Always Remain In Operation. Accordingly, The Dismantling And Assembly Of The Compressors Is Carried Out In 4 Stages, So That Three Compressors Per Side Are Always Available To Operate The System During The Complete Renovation Phase (See General Schedule - Planned Construction Phase May 2025 To June 2026). 4. Offer Evaluation: The Offers Are Evaluated Based On The Lowest Offer. 5. References: When Submitting The Offer, The Bidder Must Name At Least 3 References With A Comparable Machine Size And Performance That Can Be Viewed.