The Performance And Research Of Double Membrane Method In Reclaimed Water Reuse

Double membrane and ion exchange process is a new water treatment process, the main characteristic is low cost, high efficiency, low energy consumption and environmental protection, has become the best general scheme at presentadvanced water treatment. However, double membrane processin the operation management practice, exposed some problems,resulting in one section process failure, cause pollution to themembrane element, leads to the removal efficiency, orderprocessing effects, and even reduce the service life of membrane element. Especially the application of double membrane in water reuse, water pollutants for the component and concentration difference, extremely easy to causethedouble membrane process in the application of water reuse inthe fouling, which affects the water production rate andirreversible membrane pollution, causing serious economiclosses to the enterprise.The topic research Yanhua enterprises double membrane and ion exchange process. Double membrane+ion exchange treatmentprocess than the single ion exchange process, the system water quality can be optimized ion exchange, prolong the operation cycle from the original single process of20h to70h, reducing the consumption of regeneration, saving fresh water. At the same time as the double membrane and ion exchange processmakes the west water tobe recycled, recycling of about280t/hper hour, consumption instead of approximately200t/h fresh water, thus Yanshan Petrochemical Enterprises fresh watershortage eased to a certain extent, effectively reduces theYanshan Petrochemical Enterprises fresh water consumptionper ton oil refining industryResearch of fault and Countermeasures in the application ofdouble membrane process in bypc. For nearly ten years ofdouble membrane process are summarized in the reclaimed water used in all kinds of process optimization and operation management, from two aspects of ultrafiltration and reverse osmosis corresponding countermeasures to make the system fault, the reverse osmosis faultjudgment and generalconventional treatment method, and targeted from the inorganic scale, microorganism, impurities, organic, metal oxide,membrane damage six aspects analysis and treatment of fault,in order to achieve the double membrane method in water back to the long-term stable operation of; and focuseson theexperimental study on the chemical cleaning of ultrafiltration andreverse osmosis membrane, ultrafiltration membrane cleaningthe final plan is determined by analysis and reverse osmosismembrane cleaning solution for subsectioncleaning inverted membrane cleaning solution, operation cycle and increasedouble membrane process more effective Study of the double membrane process in the treatment ofconstraints in water reuse--reverse osmosis concentrated water. Using CAOT technology forthe treatment ofconcentrated water reverse osmosis, the utility model has theadvantages of convenient operation, no additional acid-basewastewater pollution source, but the disadvantage is theaeration time is long, the removal efficiency of COD is influenced by the type of catalyst, removal rate remained at around30%; and carbon fiber adsorption process of reverse osmosis water treatment has the advantages of strong is the removal rate of COD is not influenced by water quality change,removal efficiency can reach60%, the COD can be reduced to60mg/l, meet the discharge standard, but its operation is relatively complex, the need for regular alkali cleaning, add newacid-base wastewater pollution source, and the steam consumption is larger, the carbon fiber desorption effect is not obvious, resulting in the late removal of only around15%, can not meet the discharge standards.