Tenders Are Invited For Delivery And Installation Of A Bar Pre-Grating For The Sewage Treatment Plant In Lid ... in Poland

Work Detail

1. The Subject Of The Order Is The Delivery In The Form Of Operational Leasing With The Option To Purchase An Automatic Bar Pre-Grate, Intended For Mechanical Treatment Of Raw Sewage, Installed In The Inlet Channel To The Sewage Treatment Plant.2. The Device Must Be Brand New, Complete, And Adapted For Continuous Operation In A Municipal Sewage Environment.3. General Requirements• Grate Intended For The Separation Of Screenings From Raw Sewage, • Operation In Automatic Mode, Controlled By The Level Of Sewage In Front Of The Grate, • Grate Control Cabinet Adapted To The Existing Automation (Visualization In The Scada System), • Adapted To Work In Conditions Of High Humidity And Aggressive Environment, • Design Ensuring Safe Operation And Easy Service Access From The Staff Level, • Operation Of The Grate Scrapers Should Be Carried Out Against The Flow Of Raw Sewage, I.E. The Scrapers Should Exit From Behind The Dirt Blocking Grate To Avoid Blocking The Scraper And Pressing Large Dirt To The Grate.3.4. Required Technical Parameters (Minimum)3.4.1. Hydraulic Parameters• Maximum Flow: ≥ 100 L/S (≥ 360 M³/H)• Operation In An Open Channel3.4.2. Channel Parameters (Existing Channel - To Be Confirmed During The On-Site Visit - Requirement To Submit An Offer). • Channel Width: 700 Mm • Channel Depth: 2,100 Mm • Installation Depth (From The Bottom To The Service Level): 2,100 Mm • Channel Length: 2,000 Mm • Minimum Screenings Discharge Height (From The Floor Level): 1,200 Mm3.4.3. Grating Parameters• Grating Width: >/600 Mm• Total Grating Length: Max. 4,800 Mm• Grating Angle: Approx. 70°-80°3.4.4. Filtration Parameters• Type Of Rods: Round• Diameter Of Rods: Ø 14–16 Mm• Clearance Between Rods: 39-41 Mm• Width Of Filtration Zone: Min. 500 Mm3.5. Materials• Straining Grate – Stainless Steel Min. Aisi 304 (1.4301)• Grating Structure – Stainless Steel Min. Aisi 304 (1.4301)• Drive Chains – Stainless Steel Min. Aisi 304 (1.4301)• All Components In Contact With Sewage Made Of Stainless Steel.3.6. Drive And Control• Drive Implemented By A Geared Motor From A Renowned Manufacturer Or Equivalent,• Motor Power: Max. 1.1Kw,• Power Supply: 400 V / 50 Hz,• Protection Level: Min. Ip55,• Explosion-Proof Version Of The Drive: Not Required.3.7. Control System• Integration With The Existing Control System, Visualization In The Scada System Of Basic Operating Parameters, Including: Work/No Work, Sewage Level In Front Of The Grate, Failure (Existing System To Be Confirmed During A Site Visit - Requirement To Submit An Offer). • Control Cabinet – Included, • Automatic Operation Of The Grate: − Depending On The Sewage Level In Front Of The Grate, − In Continuous Operation Mode, − In Time Mode (E.G. Switching On At A Specified Interval, Max. 10 Min).3.8. Standard Equipment (Required)• The Grate Must Be Equipped With At Least: − Conductometric Level Sensor – 1 Pc., − Reinforced Rubber Protective Screens, − System For Controlling The Operation Of The Grate Depending On The Sewage L

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