Today thousands of tube diffusers were delivered to Malaysia.
Tube diffuser is the core oxygenation equipment in sewage treatment systems, which improves oxygen transfer efficiency through microporous aeration technology and is widely used in municipal and industrial wastewater treatment fields. The following are the technical analysis and application points:
1.Core Structure and Working Principle
Component composition
Membrane tube: Made of EPDM (Ethylene Propylene Diene Monomer Rubber), silicone rubber or PU material, the surface is laser drilled to form 0.2-3mm micropores, and the bubble diameter is controlled within 1-4mm, significantly increasing the gas-liquid contact area.
Support system: UPVC liner (outer diameter 63mm) with ABS connector, pressure resistant to 0.1MPa; Stainless steel clamps (SS304/316L) are used to secure both ends of the membrane tube to prevent air leakage.
Gas pipeline: The UPVC main pipeline is equipped with adjustable supports, and expansion joints are added when the length is greater than 20m to adapt to thermal expansion and contraction at the bottom of the pool.
Working mechanism
Compressed air is introduced into the annular chamber of the membrane tube through a branch pipe, and the pressure causes the membrane tube to expand and release uniform microbubbles; When the gas is stopped, the membrane tube shrinks elastically and automatically closes the pores to prevent sewage from flowing back and blocking the pores.
2.Technological advantages and innovative design
Efficient and energy-saving features
Micro porous bubbles extend the residence time in water, increase oxygen mass transfer efficiency by 40% compared to traditional aeration, achieve a power efficiency of 6.5kgO ₂/kWh, and reduce energy consumption by 30%.
With the combination of self closing hole technology and EPDM anti-aging formula (ozone resistance>300 pphm), the service life can reach 5-8 years and the replacement frequency can be reduced.
Anti corrosion and anti blocking design
The saturated structure of EPDM membrane tube molecular chain can withstand pH 2-12 environment, and the corrosion rate under hydrogen sulfide and chloride ion erosion is less than 0.03mm/year.
Plum shaped fabric holes reduce stress concentration, and are cleaned quarterly with low-pressure water guns (0.3-0.5MPa) to avoid calcium deposition and blockage.
Flexible installation and maintenance
Upgradable design: suspended chain connection, membrane tube can be replaced without emptying the water tank, reducing maintenance downtime by 40%.
Modular layout: Branch pipes are connected at a 45 ° diagonal tee, with a horizontal error of ≤ 3mm/m, suitable for circular/square aeration tanks.
3.Typical application scenarios
Municipal sewage treatment
In the activated sludge process and A ²/O process, the aerator service area is arranged at 1-1.5m ²/root, and the dissolved oxygen is maintained at 3-4mg/L to improve microbial degradation efficiency.
Case: After the renovation of a sewage treatment plant in a certain city, the aeration energy consumption decreased by 15% and the treatment capacity increased by 40%.
Industrial wastewater treatment
High corrosion environment (such as printing and dyeing, petrochemical wastewater): Using silicone rubber film can improve oil resistance and chemical stability by 50%.
High viscosity wastewater: Install a swirl device to enhance agitation and prevent sludge settling.
4.Key points of operation and maintenance
Air pressure optimization: The working pressure is 2000-3000Pa, and the variable frequency fan is dynamically adjusted by the linkage sensor. During low load periods, it can be reduced to 2300Pa, saving 12-18% energy.
Resistance monitoring: Quarterly detection of branch pressure difference. When the fluctuation is greater than 20%, it indicates that the membrane tube is aging or blocked and needs to be replaced in a timely manner.
