Clarifier Tank Baffle Angled 60 Degrees to Stop Density Currents
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Solution Overview
Problem
Existing baffle systems in clarifier tanks fail to effectively prevent sludge density currents from causing hydraulic short circuits, leading to solids bypassing the clarification volume and entering the effluent, especially under high load conditions.
Innovation Solution
A baffle system with baffles mounted on the peripheral wall of the tank at a 60° angle, providing a downward sloping surface that increases the horizontal projection and adjusts the baffle's position to minimize density currents and redirect solids into the main clarification volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If peripheral baffles are attached to the tank wall at a standard angle (e.g., 45°), then the baffle system can interrupt density currents to some extent, but under greater load conditions the baffle system fails to prevent hydraulic short circuits effectively
Solution Approach 1:
The patent changes the critical parameter of baffle inclination angle from the conventional 45° to a steeper 60° angle. This parameter modification increases the horizontal projection of the baffle, enhancing its ability to intercept and redirect density currents more effectively, thereby preventing hydraulic short circuits even under high load conditions while maintaining reliability
2Reliability
If the baffle angle is increased to improve solids redirection, then the horizontal projection increases and density currents are better interrupted, but the baffle system complexity and installation difficulty increase
Solution Approach 1:
The patent modifies the baffle angle parameter to 60°, which while increasing the horizontal projection and improving density current interruption, also increases installation complexity. However, this is a deterministic geometric change that can be accommodated in standard installation procedures, balancing improved reliability with manageable complexity
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
The baffle system significantly reduces the concentration of solids in the effluent, outperforming prior art designs by up to 30% in simulations and real-world conditions, even under high flow rates and varying clarifier dimensions.
Implementation Method 1
Passive baffle devices, also known in the art as a lamella gravity separators or settlers, are used in clarifier tanks for waste treatment for gravitationally separating suspended solids from solids containing carrier liquid or fluid suspensions.
Data Source
AI summary
A baffle system for a clarifier tank where the tank has a tank bottom, a periphery and a substantially vertical peripheral wall bounding the interior of the tank, said tank having an effluent channel. The baffle system includes a plurality of baffles mounted on the clarifier tank, each baffle having a baffle surface with a lower end and an upper end. The upper end of the baffle surface is coupled to a wall of the clarifier tank, the lower end of the baffle surface is disposed at a substantially 60° angle away from the side wall of the clarifier tank such that the baffle surface slopes downwardly and away from the side wall.