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Series MFS, 7,200 m³/h

Series MFS, 7,200 m³/h
2Pages

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Energy-Efficient Sludge Mixer Technology MFS 2 - 8 Technical data Digester size: Digester design: Dry solid content: Specific power consumption: Drive power: Capacity: Flow velocity draft tube: Impeller: Speed: Shaft seal: Direction of rotation: < 1.000 m³ until < 20.000 m³ Egg-shaped design, all types with conical/cylindrical design 2–8% 1.8 – 4.5 W/m³ 6.8 bis 58 kW 350 – 6.200 m³/h 2 – 4 m/s Screw type impeller design, max. (incompressible) spherical diameter: 50 – 197 mm 420 – 1,500 rpm, direct driven Lip seal system Continuous operation with clock- and anticlockwise Design details According to code 94/9/EG, FSA 05 ATEX 1543; The sludge mixers are designed to circulate the sludge in different digester designs, causing an optimum mixing in both directions and a uniform heating of the sludge. Due to the central draft tube and the continuous reversible operation the mixer gives the ability to circulate the sludge and fulfils three important process requirements: 1. Downward flow The screw type impeller forces surface sludge, including coarse floating residue, down the draft tube resulting in an ideal inter mixing and blending action that agitates settled sludge in the bottom of the digester. In the event foam forms on the top of the digester, sucked down the draft tube and remixed with the digester content. 2. Upwards flow The circulated sludge under pressure from the bottom of the digester up the draft tube to the rotating splash disc. The splash disc distributes the sludge over a large sludge surface area softening and dispersing the supernatant sludge layer. 3. Biogas The continuous reversible operation effect is an optimized Biogas production of the sludge. 1,000 m³ sludge produce according to the content 300 – 770 m³ Biogas/day. Flanges: Dimensions of connection: draft tube, inlet piece, discharge piece: DIN EN 1092-2, Type 11 PN10 Bearings: Thrust and guide bearing in combined grease-lubricated rolling bearing design. Bearing temperature monitoring with two immersion resistance thermometers PT 100 of intrinsically safe construction. Shaft sealing: Viton cap-type gaskets provide methane-resistant shaft sealing. Types of installation: Concrete digester: Gas-tight grouting directly in the digester ceiling. Steel digester: Gas-tight grouting, with synthetic resin, in a gas cap or embedded in a concrete cone. Energy efficient and robust DESIGN Vertical single-stage and two-stage HALBERG mixers with special screw-type impellers and a deflector disk mounted on the shaft. The shaft is dynamic balanced acc. DIN 1940 Grade Q2.5 to increase the lifetime of the equipment. The draft tube serves either as a suction pipe or as a discharge pipe. Due to optimised volume- and flow design of the screw type impeller in combination of circumstances with the upper draft tube outlet high flow velocity is performed by lowest energy consumption. The shaft is supported in a combined thrust and guide bearing located in the seating ring. The seating ring is fixed on the digester. The sludge mixer is direct driven by a motor whose pedestal is mounted on the foundation. The draft tube length will be aligned to suit the application. Assembly and maintenance are easy to handle due to the flanged pipe section design. Retrofits/ reconstructions: Gas-tight aligned with the existing digester Automatic lubrication: The bearings and the lip seal system are continuously supplied with a grease deposit (10 l) by a grease pump. - Level monitoring by means of proximity switch with intrinsically safe construction - Lubricants: HALBERG special Sludge Mixer grease Sludge Mixer Technology MFS 05/2015

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MFS Paint: Pre-treatment of surface: Rust removal blasting, SA 21/2 to DIN 55928 part 4. Parts inside the digester: Parts outside the digester: Prime coat: FRIAZINC W app. 60 µm Prime coat: Hot galvanised app. 80 µm Intermediate coat: FRIAZINC W app. 60 µm Top coat: INERTOLPOXITAR F Top coat: ICOSIT-EG 5 Two-component epoxy combination coat, UV-resistance, colour blue RAL 5009, low solvent content, colour black app. 410 µm layer thickness app. 90 µm Total layer thickness app. 510 µm Total layer thickness app. 150 µm Test run: Each sludge mixer will be tested in reference medium water at our...

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Series MFS, 7,200 m³/h 2Pages

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Series MFS, 7,200 m³/h
2Pages