Filter Device Diverging Cleaning Duct Partitions
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Solution Overview
Problem
Filter devices in water treatment facilities face issues with high head loss and uneven distribution of cleaning fluid during backwashing, leading to potential damage from excessive forces on filter elements due to water hammer and dynamic forces.
Innovation Solution
The filter device features a cleaning duct with a distal channel of small diameter and a proximal portion of larger diameter, with partitions angled to reduce turbulence and a cylindrical distributor element to ensure even distribution of cleaning fluid, minimizing head loss and water hammer effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large diameter cleaning duct is used to supply large volumes of cleaning fluid quickly, then the cleaning efficiency is improved, but the head loss increases and water hammer effects occur
Solution Approach 1:
The cleaning duct is divided into multiple sub-channels by partitions, creating a segmented flow path. This segmentation allows the system to handle large volumes of cleaning fluid while maintaining controlled flow velocity in each sub-channel, reducing overall head loss and preventing water hammer effects.
Solution Approach 2:
The cleaning duct transitions from a proximal portion with larger diameter to a distal portion with smaller diameter, creating a diverging geometry. This dimensional change in the duct configuration allows gradual velocity reduction and turbulence control while maintaining high cleaning fluid supply capacity.
2Productivity
If cleaning fluid is supplied at high pressure to quickly clean filter elements, then the cleaning speed is improved, but excessive forces and water hammer can damage filter elements
Solution Approach 1:
The diverging cleaning duct geometry with partitions is designed to gradually reduce flow velocity and dissipate pressure before the cleaning fluid reaches the filter elements. This beforehand cushioning effect prevents excessive forces and water hammer damage while maintaining effective cleaning capability.
Solution Approach 2:
The cleaning duct system changes the flow parameters (velocity and pressure distribution) through its diverging geometry and partition configuration. This parameter transformation allows high-pressure supply to be converted into controlled, distributed flow that cleans effectively without damaging filter elements.
3Area of stationary object
If cleaning fluid is supplied through a short proximal channel portion with large diameter, then the device footprint is reduced, but turbulence in the outflow channel increases
Solution Approach 1:
Partitions divide the short proximal channel portion into multiple sub-channels, creating a grid-shaped configuration that reduces turbulence by distributing flow across multiple paths. This segmentation maintains compact dimensions while stabilizing the flow composition.
Solution Approach 2:
The partitions create a three-dimensional flow distribution pattern within the short proximal channel portion, transforming the flow structure to reduce turbulence while maintaining the compact device footprint.
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 design achieves reduced head loss and even distribution of cleaning fluid across filter elements, preventing damage from excessive forces and allowing for efficient flushing without water hammer, while maintaining a compact footprint.
Implementation Method 1
the partitions, sub-channels are formed in the cleaning fluid duct that result in a gradual decrease in outflow velocity that reduce turbulence in the outflow channel
Implementation Method 2
a filter device having a cleaning duct supplying cleaning fluid at controlled outflow condition ensuring a reduced head loss
Implementation Method 3
a large volume of cleaning fluid is backwashed in a short time at a pressure of several bars (for instance up to 5 bar)
Implementation Method 4
cleaning fluid is backwashed in a short time at a pressure of several bars in counter flow through the filter elements
Implementation Method 5
the inflowing cleaning fluid entering the housing through the cleaning duct is distributed circumferentially around the filter elements
Implementation Method 6
large volumes of cleaning fluid can be supplied to the filter in a short time at high pressures without the risk of water hammer
Data Source
AI summary
A filter device includes a housing with an end part and a side wall and containing an axially arranged array of filter elements, such as ceramic elements. An inlet in the end part supplies fluid to the filter elements and an outlet in the side wall is provided for transporting filtered fluid from the housing, the side wall of the filter device being provided with a cleaning duct for supplying cleaning fluid to the filter elements via the side wall. The cleaning duct 6 includes a distal channel portion 15 having a relatively small diameter D1 and a proximal portion 16 adjacent the side wall having a relatively large diameter D2. A number of partitions 36, 37 extend in the proximal portion from a position at or near the sidewall towards the distal channel portion 15 at an angle (β) to a center line 20 of the cleaning duct 6.