Gassing Device Throttle for Uniform Bubble Flow
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Solution Overview
Problem
Gassing devices for membrane facilities in immersion operation face issues with non-uniform bubbling and instability at small gas flow rates due to varying pressure losses and potential clogging, leading to inefficient cleaning and residue accumulation.
Innovation Solution
A gassing device with a gas supply channel and gas lances connected via a throttle connection channel that generates a flow pressure loss, featuring an extension section with openings to ensure uniform pressure distribution and prevent clogging, allowing for stable operation and effective cleaning even at low gas flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gas lances are connected directly to the gas supply channel without throttling, then liquid can penetrate unimpeded into the gas supply channel between gassing intervals, but uniform flow distribution and stable operation at small gas flow rates cannot be achieved
Solution Approach 1:
A throttle connection channel is introduced as an intermediary element between the gas supply channel and the gas lances. This throttle channel creates a pressure loss that stabilizes gas flow distribution among parallel gas lances, preventing non-uniform bubbling and enabling stable operation even at small gas flow rates.
Solution Approach 2:
The throttle connection channel changes the pressure parameter of the gas flow by creating a controlled pressure loss. This pressure change ensures uniform gas distribution to multiple gas lances and prevents liquid penetration into the gas supply channel during non-gassing intervals.
2Reliability
If caps are provided on gas lances to prevent liquid penetration, then liquid penetration is avoided, but the annular gap can clog due to contaminants or biofilm formation in long-term operation
Solution Approach 1:
The invention removes the cap component entirely from the gas lance structure. Instead of using caps with annular gaps that are prone to clogging, the throttle connection channel is designed to prevent liquid penetration through pressure control, eliminating the maintenance issue of gap clogging while still achieving the same protective function.
3Productivity
If multiple gas lances are connected in parallel to the gas supply channel, then gas distribution is provided to multiple points, but non-uniform flow through individual lances occurs due to different flow resistances
Solution Approach 1:
The throttle connection channel acts as a mediating element between the gas supply channel and multiple parallel gas lances. By creating a controlled pressure loss in the throttle channel, uniform pressure is distributed to all gas lances, ensuring equal gas flow through each lance despite variations in their individual flow resistances.
4Ease of operation
If water penetrates through gas lances into the gas supply channel after pressure reduction, then liquid enters the gas chamber, but residues remain in the gas chamber that impair long-term operation
Solution Approach 1:
The invention eliminates the cap structure that trapped liquid residues in the gas chamber. The open gas lances allow liquid to drain freely from the gas supply channel and gas chamber, preventing residue accumulation that would otherwise impair long-term operation.
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 device ensures uniform flow through all gas lances, reduces pressure losses, and allows for complete residue removal from the gas supply channel, enhancing cleaning efficiency and maintaining device stability across varying gas flow rates.
Implementation Method 1
a connection channel (5) which, as a throttle, generates a flow pressure loss of the gas flow entering the gas lance (3)
Implementation Method 2
the pressure at the lower opening of the extension section being greater than at the upper end of the gas lance because of the height of the liquid column enclosing the device
Data Source
AI summary
A device for gassing a liquid, particularly for membrane facilities used in immersion operation, has a gas supply channel and at least one gas lance from which a gas flow exits in gassing operation. The gas lance is connected to the gas supply channel via at least one connection channel including a first mouth area on the side of the gas lance and a second mouth area on the side of the gas supply channel and generating as a throttle a flow pressure loss of the gas flow entering the gas lance. Below the first mouth area an extension section is provided, which adjoins the gas lance and has an opening below the first mouth area.