Design and application of whole membrane technology in preparation of soften water and desalted water
In view of the different needs of boiler water replenishment and acid pickling purification circu-lating water replenishment in the acid production workshop of a domestic chemical company,a full membrane water treatment system was designed following the principles of classification and quality,energy saving and con-sumption reduction,and the treatment scales of softened water and desalted water are 1 440 m3/d and 768 m3/d respectively.The design of pretreatment,ultrafiltration,reverse osmosis;elecro deionization(EDI),cleaning and dosing,and some other systems was elaborated in detail;besides,a 30-d operation analysis on each work section was carried out.The system operation results showed that,the produced water quality met the requirement of rel-evant standard.The said technology was characterized by reasonable design and stable system stability,which could greatly reduce acid and alkali chemicals consumption and frequency of maintenance.The direct costs of preparing softened water and desalted water by the system were 1.79 and 3.31 yuan/m3 respectively.
whole membrane technologyultrafiltrationreverse osmosiscontinuous electrodeionizationsoftened waterdesalted water
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