Parallel Quick-Acting Valves for Filter Backflushing
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Solution Overview
Problem
As filter systems increase in size, the nominal width of valves used for pressure pulses increases, leading to higher inertia and a slowdown in pressure rise, reducing the effectiveness of the cleaning process in textile filter bodies.
Innovation Solution
Dividing the function of a single filter into multiple small, quick-acting valves connected in parallel, allowing simultaneous partial pulses to enhance pressure rise and maintenance, with diaphragm valves used to achieve rapid and controlled pressure pulses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a single large valve is used for pressure pulses in large filter systems, then the valve can handle the required flow volume, but the valve inertia increases and pressure rise slows down, reducing cleaning effectiveness
Solution Approach 1:
The single large valve is divided into multiple smaller valves (e.g., 4 valves with 50 mm nominal width instead of one 200 mm valve). Each small valve has low inertia and can rapidly open to generate fast pressure rise, while collectively they provide the required total flow volume for large filter systems.
2Speed
If multiple small valves are used instead of a single large valve, then pressure rise speed improves, but the device complexity increases
Solution Approach 1:
Multiple small valves are connected in parallel to a common flushing line that leads to the filter bodies. This merging approach allows each valve to operate independently with fast response, while their combined effect through the common flushing line achieves the required cleaning performance without requiring complex individual valve mechanisms.
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 approach results in more rapid pressure rise and improved cleaning efficiency, effectively detaching filtered material from the filter surfaces, maintaining operational reliability and reducing energy consumption.
Implementation Method 1
a compressed air pulse which passes through the textile tubes and thus loosens filtered material which has accumulated on the outer wall of these textile tubes
Implementation Method 2
the increase in the nominal width of this valve is at the same time almost inevitably accompanied by an increase in the inertia of the valve during the opening process, thus slowing down the rise in pressure
Data Source
AI summary
Air filters comprising thin-walled textile filter bodies have to be cleaned periodically. According to a method known to this purpose, the filtered material is loosened using pressure pulses in a flushing air flow. According to the invention, for generating the pressure pulses a plurality of small, quick-acting valves are in each case briefly opened, the opening moments being adapted to one another in such a way that partial pulses released thereby arrive simultaneously at the inlet of a flushing line common thereto.