Product Introduction:
The RTL-b series submerged ultrafiltration membrane module is an ultrafiltration membrane used in external free spaces, suitable for filtering incoming water with poor water quality and high SS. The membrane module relies on the suction effect of the filtration pump to allow the filtered liquid to pass through the membrane holes on the hollow fiber membrane wall and enter the inner cavity from the outside of the membrane fibers. The filtered fluid flows through the water outlet of each membrane module and converges to the outlet of the system. The RTL-b series submerged ultrafiltration membrane components have high filtration accuracy, with a retention rate of 99.9% for 30nm polystyrene microspheres and a microbial purification rate of not less than 99.9%. The pure water flux can reach over 1000L/(m2 · h), and the overall performance has reached the leading level in China.
Product advantages:
High water production flux: The pore size distribution of membrane fibers is uniform, and the porosity is high, so the water production flux can reach the leading level in China.
Excellent water quality: The membrane fibers have uniform pore size and small pore size, resulting in high filtration accuracy and stable effluent turbidity below 0.5 NTU.
Strong antioxidant properties: The high-quality polyvinylidene fluoride (PVDF) material determines that the membrane fibers have strong chemical stability.
Good strength and toughness: The membrane fiber lining has high fracture stress, and the connection between the water collection box and the membrane fiber is good, so the membrane component will not have wire pulling or breakage.
Low cleaning frequency: After integrating the membrane module into a membrane module, the lower end adopts a non clogging groove aeration, which ensures uniform aeration and is not easily clogged. The system running program is set according to our company's requirements, and can achieve automatic online maintenance and cleaning, which can reduce pollution and blockage. Therefore, the frequency of chemical cleaning of membrane components is relatively low.
Long service life: The membrane fiber is made of excellent materials, with sufficient tensile strength, and is firmly connected to the water collection box, with a low cleaning frequency. Therefore, the overall service life of membrane components is relatively long, reaching more than 5 years.
Product Performance List:

RTL-b series submerged ultrafiltration membrane module model parameters and basic indicators
Membrane module model	RTL-10b-NHF	RTL-15b-NHF	RTL-20b-NHF	RTL-25b-NHF
External dimensions(L1×L2×D)	1010×620×40 mm	1520×620×40 mm	2020×620×40 mm	2520×620×40 mm
Integrated membrane stack size (width x height)	1400×1500 mm	1400×2000 mm	1400×2500 mm	1400×3000 mm
Membrane area	10 m2	15 m2	20 m2	25 m2
Hollow fiber membrane type	PVDF(Hook woven pipe type)
Fiber inner/outer diameter	1.0/2.1 mm
Membrane pore size	0.03μm

Basic parameters and application methods of RTL submerged ultrafiltration membrane components
Basic parameters	Membrane	Polyvinylidene fluoride（PVDF）
	Fiber bonding material	Epoxy resin+polyurethane
	Material of water collection pipe	ABS pipe
Filter effects	Suspended solids＞1μm	100%
	Microorganism	99.99%
	Turbidity of produced water	≤ 0.5 NTU
	Water production SS	≤ 2 mg/L
Conditions of Use	Filtering method	Negative pressure suction, from outside to inside
	Working pressure	0～-0.05 MPa
	Operation temperature	10～35℃
	PH range during use	6～9 (PH range 2-12 during cleaning)
	Mineral oil content in raw water	＜1 mg/L
	Maximum residual chlorine concentration in the inlet water	200 mg/L(Maximum residual chlorine concentration during cleaning 3000mg/L)
	Aeration intensity (Nm3/m2 · h membrane stack projection area)	40～80
	Design water production flux	20～40 L/m2·h
	Design backwash flux	16～50 L/m2·h
Operation mode	Total daily working hours	24 h
	work cycle	20-50 minutes of production, 2 minutes of air-water backwash
	Maximum transmembrane pressure difference	0.05 MPa
	Maximum backwash pressure	0.1 MPa