Flotation Device Underfloor Canals Sludge Management
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Solution Overview
Problem
Rapid dissolved air flotation devices face challenges in maintaining hydraulic balance and controlling sludge deposits under the floor, which can lead to operational inefficiencies and increased maintenance costs due to the formation of deposits and the need for mechanical skimming or complex network systems.
Innovation Solution
The implementation of at least two separate canals under the floor with open downstream ends above the floor level, equipped with discharge means and sludge takeoff piping, allows for efficient sludge removal and hydraulic cleaning without mechanical means, ensuring the sludge is kept in suspension and preventing deposits from forming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If mechanical skimmers or mobile vacuum cleaners are used to discharge sludge, then sludge removal is effective, but the device complexity and ease of operation deteriorate due to the need for mechanical equipment in confined spaces
Solution Approach 1:
The invention extracts the harmful sludge deposits from the flotation zone by providing discharge means that communicate with the space under the floor. The sludge is removed through canals that lead to discharge outlets, extracting the harmful substance without requiring complex mechanical equipment in the confined space under the floor.
Solution Approach 2:
The flotation device performs self-cleaning through the designed canal system that allows sludge to be discharged automatically. The system uses the existing water flow and pressure to move sludge through the canals to the discharge means, enabling the device to service itself without external mechanical intervention.
2Object-generated harmful factors
If multiple troughs or bottom networks are used to control sludge deposits, then sludge control improves, but construction costs and device complexity increase significantly
Solution Approach 1:
The invention segments the space under the floor into separate canals that are oriented in the direction of water flow. These canals divide the sludge collection function into manageable sections, each with its own discharge means. This segmentation allows for simpler construction compared to comprehensive bottom networks while still effectively controlling sludge deposits throughout the entire floor area.
3Productivity
If the flotation speed is increased to 20-40 m/h, then productivity improves, but the hydraulic balance becomes more critical and sludge deposits increase
Solution Approach 1:
The invention implements preliminary action by providing discharge means that are ready to remove sludge before it can accumulate and disrupt the hydraulic balance. The canals and discharge outlets are pre-positioned to intercept sludge deposits at their formation stage, preventing them from growing large enough to affect the hydraulic balance at high flotation speeds.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively limits sludge formation and facilitates easy cleaning, maintaining the hydraulic balance and operational efficiency of the flotation device, even at high flotation speeds, while reducing construction and maintenance costs by eliminating the need for complex mechanical systems.
Implementation Method 1
at least two separate canals, oriented in the direction in which the water flows, are provided under the floor... leading to upstream of the outlet system
Implementation Method 2
the downstream end of the canals is open and situated above floor level... a discharge means is provided, for each canal, at the end of the downstream bottom part of this canal
Data Source
AI summary
The invention relates to a rapid flotation device, in particular using dissolved air, for treating water laden with suspended matter (MES). The device comprises a mixing area (B) separated from a flotation area (C) by a wall (n) above which the liquid to be treated passes from the mixing area. The bottom portion of the flotation area comprises: a perforated floor (1) located above an apron (R), a floated-water discharge being provided under the floor and leading to an outlet system (3); and at least two separate channels (2) which are oriented in the direction of flow of the water and are provided under the floor (1), and under optional structures (w) extending from the floor, to a point upstream of the outlet system (3). The downstream end (2.1) of the channels is open and located above the floor level, and a discharge means (V) is provided, for each channel, at the end of the downstream bottom portion of said channel.