Daltonen Focusing on Separating Membrane Products and Fluid Technology Services.
How to choose cleaning agents for membrane system contamination
2023/09/08
How to choose cleaning agents for membrane system contamination Note: (W) represents the weight percentage content of the active ingredient; SHMP refers to sodium hexametaphosphate;
What precautions should be taken when starting the system for the first time
2023/09/08
To ensure that the system operating parameters meet the design parameters, the water quality and yield of the system meet the design goals, and to prevent damage to the membrane due to exceeding the limit of inflow flow and pressure or water hammer, it is necessary to operate in the correct startup sequence. Before starting the system, on the premise of ensuring that raw water does not enter the components, check each item according to the pre startup inspection items. Thoroughly rinse the pre-treatment part of the raw water, flush out impurities and other pollutants, and prevent them from entering the high-pressure pump and membrane components. Especially, check whether the SDI15 value of the pre-treatment effluent is qualified, and whether the inlet water contains no residual chlorine or other oxidants;
System shutdown and precautions
2023/09/08
When the membrane system is shut down, it is necessary to flush the entire membrane system with pre treated qualified water supply or produced water, in order to replace the high salinity concentrated water from the pressure vessel and membrane components, until the conductivity of the concentrated water outlet is close to the conductivity of the inlet water, and proceed at a low pressure of about 3.0 bar (43.5 psi). High flow rate is beneficial for improving the flushing effect, but the pressure difference between the components or pressure vessels at both ends should not exceed the maximum specified value. The low-pressure flushing inlet should not contain chemicals used for pre-treatment, nor should it contain scale inhibitors. After the flushing is completed, completely close the inlet valve. The reverse osmosis nanofiltration system should be completely filled with water. It is recommended to set the concentrated water discharge pipeline to an inverted U-shaped shape, with the top of the inverted U-shaped pipeline higher than the highest straight pressure vessel and a siphon breaking device installed.
Factors affecting the performance of reverse osmosis and nanofiltration membranes
2023/09/08
1. Recovery rate The percentage of water supply in a membrane system that is converted into permeate or permeate. The design of the membrane system is based on the preset inlet water quality, and the concentrated water valve set on the concentrated water pipeline can adjust and set a reasonable recovery rate. Enhanced pre-treatment configurations can greatly improve recovery rates. 2. Desalination rate The percentage of total soluble substance concentration removed from the system inlet through reverse osmosis membrane, or the percentage of specific components such as divalent ions or organic matter removed through nanofiltration membrane.
8 Advantages of Dalton Reverse Osmosis Membrane
2023/09/08
Dalton Reverse Osmosis Membrane has the advantages of advanced membrane formula and high-performance composite membrane production technology, effectively improving the anti pollution and antioxidant properties of the reverse osmosis membrane. It can cope with and treat different working conditions of water sources, and ultimately meet the water quality requirements. According to different application environments, products can be differentiated to produce roll type reverse osmosis membranes with high desalination rate, low-pressure operation, high water yield, and high pollution resistance. Dalton industrial grade reverse osmosis membrane components come in two sizes, 8-inch and 4-inch, and are widely used in seawater desalination, thermoelectric boiler makeup water, pure water, ultra pure water preparation, sewage treatment, chemical and petrochemical processes, food and beverage processing, and municipal engineering in many fields.
2023/09/08
Dalton produces roll type reverse osmosis membranes and nanofiltration membrane components. From the initial product - cellulose acetate membrane components to now, the company's product series has fully covered the technologically leading aromatic polyamide composite membrane series. Rich production experience, spread across multiple well running projects in China, all models of products have passed the ISO certification system, with brand direct supply, genuine product guarantee, and perfect after-sales service, saving 50% of costs. We are always ready to provide you with excellent solutions, and you can find Daltonen for on-site installation of pure water equipment nationwide!, All have proven the excellent quality and reputation of Dalton's water treatment membrane series products.
Empfohlene Neuigkeiten
2026/09/11
Only when every barrier is properly implemented can reverse osmosis membranes shift from "frequent clogging" to "long-cycle stable operation".
Why Do Reverse Osmosis Membranes "Clog"? A Complete Guide to Four Major Types of Membrane Fouling
2026/09/07
Membrane fouling is not a question of "if" but "when, what type, and how to respond." Fouling is inevitable, but it is predictable, controllable, and recoverable.
From Shenzhen to Mexico City: Daltonen Membrane Technology Debuts at Aquatech Mexico 2026
2026/09/04
Aquatech Mexico 2026 has concluded successfully, but Daltonen Membrane Technology will never slow down its pace of going global.
2026/08/17
Without properly matched supporting components, even the highest-quality membranes may underperform.
