What are the points of chemical cleaning of reverse osmosis membrane system?

Reverse osmosis membrane is contaminated, there will be a reduction in the system water production, salt permeability increase 2f353667cd7d8353b0346a37fe70d729.doc (146.50 KB) increase and other aspects of the decline in membrane performance. However, due to the reverse osmosis equipment in the use of the process, affecting the membrane performance of other major factors (pressure, temperature, etc.) changes, the phenomenon of membrane contamination may be masked by other factors, and therefore should be noted. Fushun water treatment equipment Fushun reverse osmosis membrane, Fushun reverse osmosis water treatment equipment in the reverse osmosis system operation process, reverse osmosis membrane surface will be due to the presence of mud in the raw water, colloidal substances, organic matter, microorganisms and other pollutants and membrane separation process of insoluble substances produced by the concentration of the deposition, and then the formation of reverse osmosis membrane pollution. We all know that the reverse osmosis system pretreatment device is to remove as much as possible to cause membrane contamination of the material and specially designed, in spite of this, even if the system has a fairly perfect pretreatment equipment can not completely avoid the membrane in the use of the process of contamination, so the need to carry out periodic removal of the membrane system contaminants in the course of the operation of the equipment operations, the operation process is called reverse osmosis system in situ This operation process is called Cleaning In Place (CIP) of the reverse osmosis system. The aromatic polyamide CSM reverse osmosis composite membranes provided by SEKAN have considerable stability in a wide range of pH values and a certain degree of temperature resistance, so that the user can carry out very effective cleaning of the CSM reverse osmosis system. Years of engineering practice shows that, if not in time to have a certain degree of contamination of the reverse osmosis system for cleaning, want to be more thorough removal of pollutants that have been attached to the surface of the membrane for a long time is very difficult. We suggest that users should pay attention to the following points when considering the membrane system cleaning program:? The environmental impact (EDTA, biocides, etc.) of the cleaning discharge should be minimized. Maximize the removal of contaminants during the cleaning process. Should be in the cleaning of the membrane damage minimization (should be the first to consider the selection of the membrane performance of the small impact of the agent). In the actual cleaning operation, in order to ensure the cleaning effect of the prerequisite, as far as possible to minimize the cost of cleaning. Reverse osmosis membrane contamination causes Fushun water treatment equipment Fushun reverse osmosis membrane, Fushun reverse osmosis water treatment equipment system selected inappropriate equipment or equipment material selection is not correct (pumps, piping and other). System chemical injection device failure (acid, flocculation / coagulant, scale inhibitor / dispersant, reducing agent and other). Failure to take appropriate protective measures when equipment is out of service or when the system is taken out of service. Unreasonable equipment operation and utilization by operation managers (recovery, water production, concentration, differential pressure, cleaning and others). Prolonged buildup of insoluble sediments in the membrane system. Raw water composition changes or water source characteristics have fundamentally changed. Qiqihar Dongli RO membrane, Qiqihar polymer microfiltration membrane reverse osmosis membrane system has occurred to a considerable degree of microbial contamination. Inappropriate pretreatment? The system is equipped with pretreatment devices relative to the raw water quality and flow rate is not appropriate, or in the system is not equipped with the necessary process devices and process links.