How to extend the service life of the reverse osmosis system of small industrial water purification

How to extend the service life of the reverse osmosis system of small industrial water purification equipment?

by:Ocpuritech     2021-03-20
How to extend the service life of the reverse osmosis system of small industrial water purification equipment? Author: reverse osmosis membranes play a very important role in product water quality small industrial water treatment equipment, and we hope that when using the device on a long-term device can serve us, which we need to pay more attention to the use of extended The service life of the reverse osmosis system of the small industrial water purification equipment, then how can we extend the service life of the reverse osmosis system of the small industrial water purification equipment? After the test of the reverse osmosis system of the small industrial water purification equipment, two Ways to protect the film. The equipment test machine runs for two days (15-24h), and then uses 2% formaldehyde solution for maintenance; or runs for 2-6h with 1% NaHSO3 aqueous solution for maintenance (the air in the equipment pipeline should be exhausted to ensure that the equipment is not Leak, close all inlet and outlet valves). Both methods can get satisfactory results. There are residual gas in small industrial water purification equipment running under high pressure, and the formation of air hammer will damage the membrane. There are two situations that often occur: After the equipment is emptied, when the gas is re-run, the gas is not exhausted and the pressure is quickly increased. The remaining air should be exhausted at a pressure of 2 to 4 bar, and then the pressure should be gradually increased. When the joint between the pretreatment equipment and the high-pressure pump is not well sealed or leaks (especially the microfilter and its subsequent pipelines are leaking), when the reverse osmosis pretreatment water supply is insufficient, the microfiltration will be blocked and the sealing will not be good. Because of the vacuum, some air will be sucked in in the place. The micro filter should be cleaned or replaced to ensure that the pipeline does not leak. When there are no bubbles in the flowmeter, the pressure should be gradually increased. If bubbles are found during operation, the pressure should be gradually reduced to check the cause. Since the concentration of inorganic salts on the concentrated water side of the membrane is higher than that of the raw water, it is easy to scale and foul the membrane. Rinse with pre-treated water added with chemical reagents. Water containing chemical reagents may cause membrane fouling during equipment shutdown. When the reverse osmosis equipment is about to shut down, the chemical reagents should be stopped, and the pressure should be gradually reduced to about 3 bar and rinsed with pretreated water for 10 minutes until the TDS of the concentrated water is very close to the TDS of the raw water. A common problem in the use of composite polyamide membranes is that the polyamide membranes have poor resistance to residual chlorine, and disinfectants such as chlorine are not properly added during use. In addition, users do not pay enough attention to microbial prevention, which can easily lead to microbial contamination. At present, many ultra-pure water equipment manufacturers produce ultra-pure water with microorganisms exceeding the standard, which is caused by poor disinfection and maintenance. The reverse osmosis system of ultrapure water equipment is not maintained with disinfectant; the entire pipeline and pretreatment equipment are not disinfected after the equipment is installed; no disinfection and maintenance measures are taken for intermittent operation; the pretreatment equipment and reverse osmosis equipment are not regularly disinfected; maintenance The fluid is invalid or the concentration is not enough. The relevant content on how to extend the service life of the reverse osmosis system of small industrial water purification equipment is introduced here. I hope it will be helpful to everyone. Maintaining the equipment regularly and frequent maintenance can effectively extend the water purification of small industries. The service life of the reverse osmosis system of the treatment equipment.
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