Product Introduction:
RTL curtain ultrafiltration membrane stack is an ultrafiltration membrane used in external free space, 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 curtain ultrafiltration membrane stack has 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 900-1000L/(m2 · h), and the overall performance has reached the leading level in China. Membrane stacks can be applied in various scenarios such as domestic wastewater treatment, industrial wastewater treatment, and RO pretreatment.
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 1 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:

Typical water volume application parameters of RTL curtain ultrafiltration membrane stack
Processing water volume (ton/day)	Minimum liquid level (mm)	Instantaneous flux (L/m2 · h)	Membrane stack size (L1 × L2 × H, mm)
			RTL-L series film curtain integration	RTL-b series film curtain integration
100	2500	15	1250×1600×2000	1500×1400×2000
	3000		1100×1600×2500	1250×1400×2500
200	2500		2050×1600×2000	2600×1400×2000
	3000		1500×1600×2500	2050×1400×2500
300	2500		2750×1600×2000
	3000		2050×1600×2500	2750×1400×2500
400	2500
	3000		2600×1600×2500
500	2500
	3000		3000×1600×2500

Basic parameters and usage conditions of RTL curtain ultrafiltration membrane stack
Basic parameters	Membrane	Polyvinylidene fluoride (PVDF)
	Membrane frame material	Stainless Steel
	Type of aeration system	Non polluting blocked slot aeration box
Filter effects	Suspended solids＞1μm	100%
	Microorganism	99.99%
	Turbidity of produced water	≤ 1 NTU
	Water production SS	≤ 5 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	＜3 mg/L
	Maximum residual chlorine concentration in the inlet water	200 mg/L (maximum residual chlorine concentration during cleaning is 3000 mg/L)
	Aeration intensity (Nm3/m2 · h membrane stack projection area)	40～80
	Water production flux	8～25 L/m²·h
	Backwash flux	16～50 L/m²·h
	Filtration performance of membrane pool mixed solution (The volume of the filtered liquid after filtering 50mL of membrane pool mixture through medium speed quantitative filter paper (φ 8cm) for 5 minutes at a temperature greater than 15 ° C.)	＞15 mL
Operation mode	Total daily working hours	19.2-22 h
	Work Cycle	Production time is 8-28 minutes, stop for 2 minutes
	Maximum transmembrane pressure difference	0.05 MPa
	Maximum backwash pressure	0.1 MPa
	Backwash frequency	1 time/0.5h
	Backwash time (min)	1~2
	CEB cycle	Once a week
	CIP cycle	Once every 4-6 months or when the transmembrane pressure difference reaches 0.05MPa