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Contamination and cleaning of ultrafiltration membranes
The contamination and cleaning of ultrafiltration membranes: As the contaminants retained by the ultrafiltration membrane continuously accumulate on the inner surface and in the membrane pores, the water flux and separation capacity of the ultrafiltration membrane gradually decline. Backwashing can partially restore the water flux of the membrane, but it cannot achieve a 100% recovery effect. Therefore, when the water flux of the ultrafiltration membrane drops by more than 30%, cleaning should be carried out Timely clean the contaminants adhering to the walls and pores of the ultrafiltration membrane to prevent irreversible clogging of the ultrafiltration membrane. The main cleaning methods are as follows: 1. Prepare the pH value of RO water or ultrafiltration water to 2 with HY-410 cleaning agent, inject it into the inlet valve of the ultrafiltration membrane through a booster pump, and circulate it back from the discharge valve. Adjust the discharge valve to stabilize the pressure at 0.25Mpa. After 30 minutes of circulation cleaning, adjust the inlet valve, discharge valve and other valves
Details >Can Dow FILMTECTM membrane elements be used for concentrating or purifying organic solvents?
Answer: Hydrophobic solvents are incompatible with FILMTECTM membrane elements. However, hydrophilic solvents such as ethanol can. Hydrophilic solvents will not damage the membrane elements but will cause membrane swelling, altering the membrane's desalination and water production characteristics. Additionally, high-concentration organic solvents will undergo extraction from the sealing and bonding lines of the membrane elements. Long-term contact will damage the bonding and sealing. At present, it is still impossible to estimate how long the membrane element can withstand. We suggest conducting compatibility tests on membrane sheets. If the results are good, then small-scale element tests can be carried out.
Details >Yuanlai briefly introduces to you what industrial pure water equipment is
Yuanlai briefly introduces to you what industrial pure water equipment is. Ion exchange is a special solid adsorption process, which takes place in an electrolyte solution with an ion exchanger. The common ion exchanger is a solid granular substance that is insoluble in water, namely ion exchange resin. It can absorb a certain cation or anion from an electrolyte solution and exchange out an equal amount of another ion with the same charge symbol it contains and release it into the solution. This is what is called ion exchange. According to the types of ions exchanged, ion exchangers can be classified into two major categories: cation exchangers and anion exchangers. Ion exchange A. Firstly, electrolyte ions (such as calcium, magnesium, iron, sodium ions, etc.) pass through the liquid film and enter the resin surface. B. Ions enter the interior of the resin; C. Ion exchange; d, H ions or OH ions are directed towards the tree
Details >Yuanlai Water Treatment Engineering System + One-stop water treatment Accessories Procurement
Our company is an environmental protection enterprise specializing in the design, manufacture, installation, commissioning, after-sales service of complete water treatment system projects, as well as the sales of water treatment equipment and accessories. Our company has introduced and adopted water treatment technologies such as ion exchange and reverse osmosis pure water, and can provide high-quality production water and industrial circulating water treatment complete sets of equipment for a wide range of industries including electronics, metallurgy, chemical engineering, beverages, semiconductors, pharmaceuticals, detergents, power plants, etc., such as Mengniu, Yili, Sinopec, China Railway Group, Nongfu Spring, Huiyuan Juice, Tsingtao Beer, Ganli Pharmaceutical. Provide customers with high-quality production water to ensure stable operation throughout the year. Yuanlai Enterprise, a one-stop supply service provider of water treatment equipment and accessories for 20 years, is dedicated to the industry application. Beijing Yuanlai Water Treatment Equipment Co., Ltd. has been dedicated to water treatment services for 20 years
Details >The application of ultrafiltration in water treatment, Beijing water treatment equipment, Beijing ultrafiltration equipment, Beijing ultrafiltration membrane. Ultrafiltration is a membrane system between microfiltration and nanofiltration, with an average pore size ranging from 3 to 100nm. Ultrafiltration membrane is a membrane separation technology that can purify, separate and concentrate solutions. Its retention mechanism is mainly sieving, but sometimes the membrane pores are larger than the solvent molecules. It is also larger than the solute molecules. The chemical properties of the membrane surface also play a role in retention. With the pressure difference on both sides of the membrane as the driving force and the ultrafiltration membrane as the filtration medium, under a certain pressure, when water flows over the membrane surface, only water and low-molecular-weight solutes are allowed to pass through, thereby achieving the purpose of purifying, separating and concentrating the solution. The application of ultrafiltration in water treatment: Ultrafiltration in drinking water treatment can generally remove water from water including w
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Yuan LaiEDIThe ultra-pure water equipment uses electro-deionization technology.EDIElectrodeionization is a water purification method that combines the dual advantages of electrodialysis and ion exchange. It does not require acid-base chemical regeneration and can continuously and stably prepare high-purity ultrapure water. Under the action of a direct current electric field, ion separation in water is completed. At the same time, water is electrolyzed to generate hydrogen ions and hydroxide ions, achieving automatic regeneration of the resin without the need to stop the machine for manual regeneration. The pre-treatment combined with reverse osmosis can prevent oxidized substances from damaging the resin, ensuring stable effluent quality and widely meeting the high-standard water usage requirements of various industries.
The non-negative pressure water supply equipment can be directly connected to the municipal water supply network, making full use of the residual pressure of the original network for superimposed water supply. Fully enclosed operation does not require the construction of a domestic water tank, eliminating secondary pollution. Intelligent variable frequency voltage stabilization, energy-saving, quiet and easy installation, it is the preferred equipment for secondary water supply in high-rise residential buildings and commercial buildings.
Constant pressure water supply equipment is widely used in central air conditioning, floor heating, industrial closed-loop water circulation, and boiler systems. It integrates automatic pressure stabilization, automatic water replenishment, automatic exhaust, pressure relief and buffering functions. It stabilizes the pressure in the pipeline network, eliminates abnormal sounds caused by air blockage, and prevents damage from negative pressure and water shortage in the pipeline. It is an essential supporting equipment for HVAC and circulating water systems.
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