Movable Suction Bar Disc Filter Backwashing for Low Flow Resistance
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Solution Overview
Problem
Existing disc filters face challenges in efficiently cleaning filter cloths due to high flow resistance and frequent clogging, necessitating frequent backwashing, which is often inefficient and costly, and existing backwashing devices are complex and prone to mechanical failures.
Innovation Solution
A suction device with a movable suction bar that adjusts radially to the disc filter's radius, allowing for continuous or stepped movement, and a narrower width than the filter body, enhancing suction power and optimizing backwashing by adjusting spacing from the filter cloth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional backwashing device is used to clean the filter cloth, then the filter cloth can be cleaned, but the device is complex and prone to mechanical failures
Solution Approach 1:
The invention extracts the essential backwashing function from complex mechanical devices and implements it through a simple suction bar with suction slits. The suction bar directly removes particles from the filter cloth surface through suction force, eliminating the need for complex backwashing mechanisms while maintaining cleaning effectiveness and improving reliability
Solution Approach 2:
The suction bar enables the filter cloth to clean itself by directly suctioning particles off its surface. The filter cloth does not require external complex cleaning devices; instead, the suction bar creates a self-cleaning effect by removing accumulated particles through the suction slits, reducing mechanical complexity and improving reliability
2Productivity
If the filter cloth is cleaned frequently to maintain low flow resistance, then flow resistance is kept low, but cleaning efficiency is insufficient and maintenance costs increase
Solution Approach 1:
The invention replaces conventional mechanical backwashing systems with a suction-based system. The suction bar uses suction force generated by a pump to remove particles directly from the filter cloth surface, substituting complex mechanical backwashing mechanisms with a simpler suction mechanism that improves cleaning efficiency and reduces maintenance time
Solution Approach 2:
The invention uses pneumatic principles through the suction bar and suction pump to remove particles from the filter cloth. The suction slits create negative pressure that draws particles off the filter surface, utilizing pneumatic force instead of mechanical backwashing to achieve more efficient cleaning with less time and lower maintenance costs
3Area of stationary object
If a wide suction bar is used to cover the entire filter body, then the suction device can clean the whole surface, but the suction power is reduced
Solution Approach 1:
The suction bar is designed with multiple suction slits distributed along its length, segmenting the suction function into multiple zones. This segmentation allows the suction bar to maintain effective suction power at each slit while collectively covering the entire filter cloth surface, resolving the contradiction between width and suction power
Solution Approach 2:
The suction bar is made movable along the filter cloth surface, allowing it to dynamically cover different areas during operation. This dynamic movement enables a narrower suction bar to achieve complete surface coverage over time without sacrificing suction power, as the bar can be repositioned to clean different sections sequentially
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 solution reduces flow resistance, increases backwashing speed, and enhances cleaning efficiency by detaching particles effectively, while minimizing mechanical failures and maintenance costs.
Implementation Method 1
a suction device (1) for disc filters (2), wherein the suction device (1) comprises at least one suction bar (4) per discoid filter body (3) and a suction slit (13) designed for suctioning the impurities of the filter cloth (10)
Implementation Method 2
a suction pump (9) for suctioning the impurities
Data Source
AI summary
A suction device for a disc filter includes at least one suction bar per discoid filter body and a suction slit designed for suctioning the impurities of the filter cloth, as well as a suction pump for suctioning the impurities. The suction bar is movable radially from the axis of rotation of the disc filter.