Adjustable Flow Deflection Member for Drum Filter Inlet
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Solution Overview
Problem
Internally fed drum filters for wastewater treatment face issues with clogging and uneven flow distribution due to the use of headbox-type inlet distributors, which can lead to foul water retention and unpleasant odors, as well as an inability to adjust flow characteristics.
Innovation Solution
An adjustable flow deflection member is integrated near the outflow opening of the inlet duct to control the flow velocity and direction of wastewater, eliminating the need for a headbox and allowing for optimal distribution of wastewater and solids across the drum filter surface, with adjustable angles and orientations to prevent clogging and foul water stalling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a headbox-type inlet distributor is used, then the inlet area is covered and waste water can enter the drum filter, but debris builds up inside the reservoir causing the headbox to clog
Solution Approach 1:
The patent removes the headbox reservoir entirely and replaces it with a direct inlet duct configuration. The inlet duct opens directly onto the drum filter surface without an intermediate reservoir, eliminating the space where debris could accumulate and cause clogging while still providing necessary flow distribution.
Solution Approach 2:
The patent introduces an adjustable flow deflection member that can be positioned at different angles to optimize flow characteristics. This dynamic adjustment capability allows the system to adapt to varying operating conditions and prevent clogging by directing flow away from areas prone to debris accumulation.
2Ease of operation
If a headbox-type inlet distributor is used, then waste water can be distributed across the drum filter, but foul water is retained in the reservoir causing fouling and unpleasant smell
Solution Approach 1:
The patent eliminates the headbox reservoir that trapped foul water by using a direct inlet duct configuration. Without a reservoir, there is no space for foul water to be retained, preventing fouling and unpleasant odors while still achieving flow distribution across the drum filter surface.
3Ease of operation
If a headbox-type inlet distributor is used, then waste water can enter the drum filter, but the flow characteristics cannot be adjusted
Solution Approach 1:
The patent introduces an adjustable flow deflection member within the inlet duct that can be positioned at different angles. This allows operators to dynamically adjust flow characteristics such as flow velocity, flow direction, and distribution pattern to optimize performance for different operating conditions.
Solution Approach 2:
The patent enables adjustment of flow parameters (velocity, direction, distribution) by changing the position of the flow deflection member. This provides versatility in controlling flow characteristics without requiring multiple different inlet distributor designs.
4Adaptability or versatility
If the inlet duct discharges waste water directly onto the drum filter, then flow distribution can be controlled, but waste water and solid substances collect below the outflow opening causing clogging
Solution Approach 1:
The patent uses an adjustable flow deflection member that can be positioned to deflect waste water and solids away from areas prone to accumulation, specifically below the outflow opening. By adjusting the deflection angle, the system prevents clogging while maintaining effective flow distribution across the drum filter surface.
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 adjustable flow deflection member enhances the distribution of wastewater and solids, preventing clogging and foul water retention, while allowing for customizable flow characteristics to optimize the treatment process, leading to improved efficiency and reduced maintenance.
Implementation Method 1
an adjustable flow deflection member arranged near the outflow opening of the inlet duct, downstream thereof, for adjusting the flow characteristics of waste water entering the drum filter via the inlet duct
Implementation Method 2
The inner surface of the drum filter is provided with a spiral that due to rotation of the drum enables solid substances present in the waste water to be pushed towards the end of the drum filter opposing the inlet duct end in order to be removed. At the same time the permeability of the drum enables water to leave the drum filter via the circular drum wall
Data Source
AI summary
An internally fed drum filter for treating waste water, includes an inlet distribution arrangement for distributing waste water entering the drum filter via an inlet duct, characterized in that the inlet distribution arrangement includes an adjustable flow deflection member arranged near the outflow opening of the inlet duct, downstream thereof, for adjusting the flow characteristics of waste water entering the drum filter via the inlet duct.