Lamella Clarifier Partition Wall Design for Sediment Disturbance Control
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Solution Overview
Problem
Existing lamella clarifiers have insufficient sedimentation properties due to inadequate contact between dirty water and settling plates, leading to incomplete clarification of wastewater, especially when sediment is stirred up and floating contaminants are not effectively removed.
Innovation Solution
A partition wall divides the sedimentation tank into two areas, slowing down incoming dirty water in the first area to prevent sediment disturbance and allowing it to flow turbulently over inclined settling plates in the second area, enhancing sedimentation and separation of suspended particles and solids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dirty water is fed directly into the sedimentation tank near the settling plates, then the settling plates can be utilized, but the water flow stirs up and entrains settled sediment, reducing clarification efficiency
Solution Approach 1:
The sedimentation tank is divided into two separate areas: a first area for sedimentation and a second area for clarification. This segmentation prevents the direct contact between incoming dirty water and settled sediment, eliminating the harmful effect of sediment disturbance while maintaining effective use of settling plates in the second area.
2Device complexity
If only a few settling plates are arranged in the sedimentation tank, then the structure is simpler, but the clarification is insufficient because dirty water does not come into sufficient contact with the settling plates
Solution Approach 1:
The settling plates are extracted and placed exclusively in the second area of the sedimentation tank. This allows for a smaller number of settling plates to be used while still achieving sufficient clarification, as the plates are positioned where they can effectively process the water flow without being contaminated by sediment disturbance in the first area.
3Ease of operation
If floating contaminants are not removed, then the system is simpler to operate, but the water quality is insufficient
Solution Approach 1:
The first area serves as a preliminary treatment zone where floating contaminants are allowed to settle or be removed before water enters the second area. This preliminary action prepares the water for more effective clarification in the second area, improving overall water quality without requiring complex operational interventions.
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 configuration improves sedimentation efficiency by reducing turbulence, allowing for effective settlement and removal of contaminants, resulting in clearer water output with reduced operational complexity and maintenance needs.
Implementation Method 1
slowing down incoming dirty water in the first area to prevent sediment disturbance
Implementation Method 2
allowing it to flow turbulently over inclined settling plates in the second area, enhancing sedimentation and separation of suspended particles and solids
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a lamella clarifier (1) that comprises a sedimentation container (2) which has a waste water feed (3) and a clear water discharge (4), as well as at least one first settling plate (6). According to the invention, a separating wall (5) is arranged in the sedimentation container (2) such that, when viewed from above, the inner chamber of said sedimentation container (2) is divided into a first region (7) which comprises the waste water feed (3), and a second region (8) which comprises the clear water discharge (4) and the settling plate (6), said first and second regions (7, 8) being interconnected at the base to allow waste water to pass through, and the settling plate (6) extending transversely through the second region at a positive incline in the direction of the clear water discharge (4).