4. Operation of reverse osmosis system:
The design of reverse osmosis technology in the plant's large-scale water treatment project is feasible. The 4 INCH frp filter housings supplier believes that the operation effect is better and it is suitable for the plant's large-scale electronic ultrapure water. Processing. Time Wharton's PURO-I membrane works well in this system, providing stable water quality to the plant's subsequent water treatment process. During the operation of the first-stage reverse osmosis system, the operating pressure of the system is about 1 MPa; the water conductivity of the system fluctuates between 300 ~ 400 μS / cm, the conductivity of the produced water is always below 5 μS / cm, and the desalination rate of the system Above 98.5%; the average water output of the system is about 100 mm3 / h, and the recovery rate of the system is about 75%, which meets the customer's water supply requirements
5. Cleaning of reverse osmosis system:
FRP Water Softening is mainly organic substances, colloids and microorganisms, but the pollution is not serious. The standard of chemical cleaning is that when the production water flow rate decreases by about 10%, chemical cleaning is necessary. Maintenance cleaning is also required when the drop in water production has not reached 10%. In general, the average cleaning cycle is about 3 months. Due to the fouling of the organic matter and calcium carbonate, the cleaning agent selection is mainly aimed at these pollutants. The alkaline washing is mainly based on the compounding agent. The composition of the compounding agent is: NaOH Na-SDS (sodium dodecylbenzenesulfonate) and other agents, pH is about 12, washing time is about 6 hours; acidic washing solution is HCl (hydrochloric acid), pH is 2 ~ 3, washing time is 1 h The temperature of the cleaning solution is 30 ℃; finally, the system uses a non-oxidizing bactericide DBNPA for sterilization and cleaning treatment. The system is cleaned in a single stage, and each stage is cleaned in three stages. The flow rate of a single membrane shell is 5 mm3 / h at the beginning (1 hour for alkaline washing and 10 minutes for acid washing); then the single membrane shell is cleaned. The liquid flow is about 5 mm3 / h for circulating cleaning (the function of alkaline washing for 4.5 h and acid pickling for 40 min); finally, the large flow is used for flushing at a flow rate of about 10 mm3 / h (for alkaline washing for 0.5 h and alkaline washing for 10 min) . After each chemical cleaning, turn on the pure water pump for flushing until the cleaning solution is flushed out by pure water.
Frp Water Softening
6. Benefit analysis
The whole sea water desalination fixed assets depreciation cost, electricity consumption, chemical consumption and labor costs are calculated. Among them, the cost of primary reverse osmosis water production is 2.87 yuan / t and the cost of secondary reverse osmosis water production is 4.47 Yuan / t, the total cost of ultra-pure aquatic water is 6.85 yuan / t, and the price of local tap water is 2.33 yuan / t. This water treatment system provides the factory with high-quality and stable water.
7. Conclusion
The reverse osmosis technology was successfully applied in the plant's large-scale electronic ultrapure water project, providing a high-quality water source for the subsequent desalination process, ensuring the stability of the subsequent desalination process, and verifying the application of the reverse osmosis technology in the electronic ultrapure water project. The good performance in China also adds a mature case for reference. The excellent performance of Time Wharton reverse osmosis membrane in it also gives electronic ultrapure water customers a choice of reverse osmosis membrane brand.
