Tenders Are Invited For Equipping The Sewage Treatment Plant In Wizna With A Sludge Press

2. The Subject Of The Contract Is The Delivery And Installation Of A Sludge Dewatering Press At The Sewage Treatment Plant In Wizna, Including The Sludge Dewatering Installation With Hygienization. For Sludge Dewatering, It Is Planned To Use A Screw Press To Obtain The Maximum Possible Concentration Of Dry Matter In The Sludge After Dewatering. The Sludge Dewatering Installation Includes The Following Elements: A) Sludge Retention Tank With A Capacity Of Not Less Than 3 M3, Made Of Hardened Pe Material. B) Sludge Feed Pump With The Following Parameters: - Efficiency: On Average 2 - 9.0 M3/H - Voltage: U = 400 V - Frequency: F = 50 Hz - Protection Type: Ip 55 - Speed ​​Control With Frequency Converter, Protected Against Dry Running C) Inductive-Magnetic Flowmeter Of Hydrated Sludge, Used To Measure The Amount Of Sludge Fed To The Press. Flowmeter In A Flange Version, Class Pn 40, For Installation In A Sedimentary Pipeline. - Compact Version With Display. - Minimum Protection Type Ip67 - Internal Polyurethane Liningd) Static Mixerfittings Between The Flanges For Even Mixing Of The Polyelectrolyte Solution With The Sludge.E) Flocculation Reactorhorizontal Tank Installed Behind The Sludge Mixer With The Polyelectrolyte Solution. It Enables The Optimal Production Of Sludge Flocs, The So-Called Sludge Conditioning. Reactor Length Not Less Than 2000 Mm, Diameter Not Less Than 210 Mm. Materials Of The Reactor - Stainless Steel, Quality Not Worse Than Aisi 304L, Pickled In An Acid Bath. - The Press Should Have An Integrated Screw Conveyor With A Conical Shaft And A Variable Pitch Of The Coils Towards The Outlet. Replaceable Elements For Cleaning The Inner Surface Of The Perforated Screens Are Mounted On The Edges Of The Screw Roll. - The Device Should Be Equipped With A Set Of At Least 3 Sieves With A Decreasing Clearance, Joined By A Flange With A Trapezoidal Cross-Section. Each Sieve Is To Consist Of Two Sections, Which Allows The Auger To Be Serviced Without Having To Dismantle It. - Sludge Outlet Allowing For Regulation Of The Outlet Opening And The Degree Of Sludge Dewatering, E.G. Equipped With A Cylindrical Cone With Pneumatic Drive - Slow-Speed Press. The Maximum Rotational Speed Of The Screw Should Not Exceed 1.5 Min-1. - Rotation Speed Should Be Regulated On-Line Depending On The Pressure Value In The First Section Of The Press In The Range Of 0-500 Mbar. - The Process Of Sludge Dewatering And Filter Surface Cleaning Should Be Carried Out Using The Same Drive With A Power Of Not More Than 1.5 Kw • Sludge Transporting And Dewatering Screw, • A Drum With A Filtering Surface, Which Is Periodically Rinsed By A Strip With Nozzles. . During The Flushing Process, The Operation Of The Sludge Pump Should Be Automatically Stopped. - The Demand For The Flushing Medium Is Not More Than 500 L/H - Material Design Of The Screw Press - Steel Grade Not Worse Than Aisi 304L, Additionally Protected Against Corrosion In The Immersion Passivation Process (Excluding Bearings, Rollers, Hoses). G) Compressor: Piston Type - Tank Volume ≥ 24 L - Drive: Protection Not Worse Than Ip 54 - Operating Parameters Adapted To The Requirements Of The System H) Polyelectrolyte Concentrate Pump - Maximum Capacity: 30 L / H - Pump Motor Power Not More Than 0.37 Kw - Sealing Class Not Lower Than Ip55 - Protected Against Dry Running. I) Polyelectrolyte Preparation Station. Not Less Than 1000 L, At Least Three-Chamber, Overflow With A High-Speed Stirrer In Each Chamber (Power Not More Than 0.37 Kw), Rotor Shaft And Blades Made Of Steel Not Worse Than 1.4301: - With Measurement Of The Amount Of Ready Solution Level In The Last Chamber Using A Hydrostatic Probe - System Protecting The Formation Of Scum In The Ready Solution Chamber - Possibility Of Draining Each Chamber Using Manual Valves Dn 25 - Emergency Overflow Dn 50 - Required Operation With Polyelectrolyte In The Form Of A Liquid - Precise Water Preparation System (Solenoid Valve With , 0.2 Mm Filter With Pressure Reducer, Flow Meter, Slant Reducing Valve) - Female Water Connection - Inspection Cover In Each Chamber) Flocculant Dosing Pump - Capacity Regulated By Frequency Converter Within The Range Of: Not Less Than 150 -1500 L/H - Power Pump Motor No More Than 0.75 Kw - Tightness Class Not Worse Than Ip55k) Polyelectrolyte Solution Flow Meter For Measuring The Amount Of Sludge Supplied To The Press - Tightness Class: Not Lower Than Ip67l) Pipelines Polyelectrolyte And Sludge Solutions Made Of Pvc-Um) Hopper And Dispenser Lime - Lime Tank With A Capacity Of Not Less Than 250 Kg Of Lime - Lime Screw Feeder With A Drive Of Not More Than 0.55 Kw - Electric Vibrator Preventing Lime Colmatation N = Not More Than 0.25 Kw - Exhaust Fan With A Tank N = Not More Than 0 .3 Kw - Bag Cutting System - Material Version Of The Hopper And Dispenser - Steel Grade Not Worse Than Aisi 304 2000 Kg/H - Conveyor Type: Shaft - Length Enabling Sludge Discharge Outside The Building (Length Total Min 7.0 M) - Material Of The Conveyor In Its Entirety: Steel Grade Not Worse Than Aisi 304, Except For The Lining (Pe 1000 And The Drive). - Protection Against Freezing: Self-Regulating Heating Cable With A Heating Power Of 20/40 W/M, Technical Mineral Wool, Thickness Not Less Than 50 Mm, Flashings Made Of Sheet Metal Of The Grade Not Worse Than 1.4301, Thickness Not Less Than 0.8 Mm, Surface Finish: Polished. All Sheet Metal Connectors Made Entirely Of Steel Not Worse Than 1.4301. Collisions Of The Jacket With The Transporter Structure Are Secured With An Aging-Resistant Adhesive Sealant. The Heating Cable Is Controlled By An Independent Power Supply And Control System.