How to control the inlet water quality index of reverse osmosis ultrapure water equipment system-Ocp

How to control the inlet water quality index of reverse osmosis ultrapure water equipment system

by:Ocpuritech     2021-05-19
How reverse osmosis ultra-pure water equipment control system water quality index author of the article: ultra-pure water reverse osmosis equipment mainly by the preprocessing unit, reverse osmosis host and post-treatment composition, ultra-pure water equipment reverse osmosis system uses the world's leading technology -RO film Separation technology, through the high-precision reverse osmosis membrane, effectively removes impurities such as colloids, suspended solids, microorganisms, and bacteria in the water, and is widely used in various industries. The reason why the water quality of the reverse osmosis ultrapure water equipment system can meet the needs of different industries is that the reverse osmosis ultrapure water equipment system has its corresponding indicators, and only those indicators are qualified ultrapure water. Let us understand how to control the effluent of the reverse osmosis ultrapure water equipment system. (1) Control of inlet water conductivity. Strictly control the conductivity in the pre-treatment process to make the conductivity of the EDI inlet water less than 40μS/cm, which can ensure the qualified conductivity of the outlet water and the removal of weak electrolytes. (2) Control of working voltage-current. The proper working voltage-current should be selected when the system is working. At the same time, because there is a limit voltage-current point on the voltage-current curve of the EDI water purification equipment, it is related to factors such as the quality of the influent water, the performance of the membrane and the resin, and the structure of the membrane [4]. In order to ionize a certain amount of water to produce enough H+ and OH- ions to regenerate a certain amount of ion exchange resin, the voltage-current operating point of the selected EDI water purification equipment must be greater than the limit voltage-current point. (3) Control of influent CO2. Alkali can be added before the RO to adjust the pH to maximize the removal of CO2, and the degassing tower and degassing membrane can also be used to remove CO2. (4) Control of the water hardness. It can be combined with removal of CO2 to soften and add alkali to the RO influent; when the salt content of the influent is high, it can be combined with the removal of salt to increase the level of RO or nanofiltration. (5) TOC control. Combined with other indicator requirements, a first-level RO is added to meet the requirements. (6) Control of turbidity and pollution index. Turbidity and pollution index are one of the main indicators of RO system inlet water control. Qualified RO outlet water generally can meet EDI inlet water requirements. (7) Fe control. During operation, the Fe in the EDI inlet water is controlled to be less than 0.01 mg/L. If the resin has been 'poisonedThe effluent index of the reverse osmosis ultrapure water equipment system is controlled within the specified range, so the water quality of the pure water equipment must be qualified industrial water. When using purified water equipment, users must pay attention to the above indicators to avoid the occurrence of unqualified water quality that affects production.
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