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{"title":"High Capacity Dissolved Air Flotation Machine for Large Scale Wastewater Plant","imgUrl":"https:\/\/img.chinax.com\/nimg\/49\/c3\/0480c3f587b9ea7eb3d6e7ff26ff-200x200-1\/high_capacity_dissolved_air_flotation_machine_for_large_scale_wastewater_plant.jpg","attrs":{"Tank Material":"Carbon Steel with Epoxy Coating","Payment Terms":"L\/C,T\/T,Western Union","Certification":"CE, ISO 9001","Model Number":"ECER-DAF-HC150"}}
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Self Cleaning DAF Machine with Automatic Sludge Scraper and Thickening System
This Self Cleaning Dissolved Air Flotation Machine featuring an advanced automatic sludge scraper system is engineered to minimize manual intervention in sludge handling operations while maximizing the dry solids concentration of the harvested float material. The system employs a heavy-duty stainless steel chain-and-flight scraper assembly driven by a variable-speed geared motor that continuously traverses the full length of the flotation cell, gently pushing the accumulated surface sludge layer toward the collection hopper without disturbing the underlying clarified water zone.
Key Features
Heavy-Duty Chain-and-Flight Scraper: Stainless steel chain assembly with corrosion-resistant flight bars spans the full cell width and length, engineered for continuous duty with bearing life exceeding 40,000 operating hours under normal conditions.
Variable Speed Drive with Torque Sensing: Geared motor with VFD control automatically adjusts scraper traverse speed based on real-time torque feedback, preventing motor overload while maintaining consistent sludge removal under variable loading.
Integrated Sludge Thickening Zone: Extended drainage section with inclined weir configuration provides additional free-drainage time for harvested float material, increasing dry solids content before discharge to downstream handling equipment.
Anti-Bridging Hopper Design: Steep sixty-five degree hopper wall angles combined with PTFE-coated internal surfaces ensure complete gravity sludge discharge without accumulation or the need for manual raking intervention.
Timed Self-Cleaning Spray System: Programmable spray bar assembly periodically rinses scraper blades and flight chains with plant water or treated effluent, preventing solids accumulation that degrades harvesting efficiency.
Automatic Sludge Discharge Valve: Pneumatically actuated knife gate valve on the hopper outlet opens on a configurable timer or sludge level signal for hands-free sludge transfer to dewatering equipment or collection containers.
Observation Platform with Handrails: Integrated walkway along the full length of the flotation cell provides safe access for visual inspection of sludge blanket consistency and scraper operation during periodic maintenance rounds.
Technical Specifications
Parameter
Specification
Model Series
ECER-DAF-SH Series
Flow Rate Range
5 - 80 m³/h
Scraper Type
Chain-and-Flight, Stainless Steel
Scraper Drive
Geared Motor with VFD (0.37 - 1.1 kW)
Hopper Wall Angle
65° with PTFE Coating
Sludge Dry Solids Output
4% - 8% DS
Sludge Discharge Valve
Pneumatic Knife Gate, Automatic
Self-Cleaning Spray
Programmable Timer Control
SS Removal Efficiency
≥ 90%
Scraper Bearing Life
≥ 40,000 Operating Hours
Total Installed Power
3.0 - 11 kW
Applications
The automatic sludge handling DAF excels in treatment scenarios where high sludge production rates demand reliable automated collection and thickening without continuous operator attendance. Meat and poultry rendering facilities generating substantial volumes of proteinaceous float material from dissolved air flotation treatment depend on the robust scraper system to handle heavy sludge loads around the clock without manual intervention during night and weekend shifts. Pulp and paper mills recovering fiber from white water circuits rely on consistent sludge harvesting to maintain fiber recovery rates while the automatic discharge transfers thickened stock directly to the pulp storage chest without intermediate pumping or handling stages. Municipal wastewater treatment plants using DAF for primary clarification ahead of biological treatment benefit from the integrated thickening zone that reduces sludge volume and associated haulage costs before anaerobic digestion. Industrial vegetable oil refineries processing soapstock and acid oil from chemical refining stages depend on the automatic scraper to continuously harvest the oil-rich float layer for valuable byproduct recovery while maintaining consistent effluent quality for downstream treatment. Dairy processing plants handling high-fat waste streams from butter, cheese, and cream production operations utilize the self-cleaning spray system to prevent fat accumulation on scraper components that would otherwise require manual cleaning shutdowns and production interruptions.
Packaging & Quality Assurance
Each sludge handling DAF system undergoes a factory operational test including scraper mechanism cycling under load simulation to verify smooth traverse motion, torque sensing response, and self-cleaning spray function before shipment. The complete system is packed in a reinforced export crate with the scraper chain pre-tensioned and flight bars secured with temporary locking pins that are removed during commissioning. Documentation deliverables include scraper assembly and tensioning instructions, VFD parameter configuration sheets, sludge discharge valve maintenance procedures, recommended lubrication schedules with grease specifications, and a comprehensive troubleshooting guide covering common sludge handling issues. Our standard 12-month warranty covers all mechanical and electrical components against manufacturing defects. Optional service agreements include annual scraper chain tension inspection and adjustment, wear component replacement forecasting based on operating hours, and on-site operator training focused on optimizing sludge consistency and minimizing chemical conditioning costs through proper scraper speed and frequency configuration tailored to your specific wastewater characteristics.
