Method for removing calcium in brine through ultrasonic treatment
An ultrasonic treatment, ultrasonic technology, applied in the direction of water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of reducing the time and cost of subsequent descaling operations, and the surface of membrane or evaporation equipment is prone to condensation. Scale and other problems, to achieve the effect of improving the desalination water production rate, extending the service life of equipment, and protecting the environment
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Embodiment 1
[0029] Natural seawater (containing Na + 11.93g / L, Mg 2+ 1.22g / L, Ca 2+ 0.39g / L, K + 0.38g / L,Sr + 0.01g / L) after being treated by a polyether ultrafiltration membrane with a molecular weight of 50,000, it enters a reverse osmosis coiled polyamide membrane, and desalination is carried out at 5Mpa to obtain a pH of brine=6.9 (containing Na + 59.7g / L, Mg 2+ 6.1g / L, Ca 2+ 1.95g / L, K + 1.9g / L,Sr + 0.04g / L); then, the flow rate is 1.5m 3 The brine (concentrated seawater) of / h is transported to the pipeline equipped with ultrasonic probes, the inner diameter of the pipeline is 20 cm, and the interval between every two probes is 40 cm, placed in sequence along the pipeline, a total of 60 (keep the brine in The dwell time under ultrasound is 30 minutes). The end diameter of the ultrasonic probe used is 6 mm, and the parameters of the ultrasonic treatment are set to an average power density of 2000 W / m 3 , Frequency 50kHz, ultrasonic mode of action is continuous. Get export ...
Embodiment 2
[0031]Natural seawater (containing Na + 11.93g / L, Mg 2+ 1.22g / L, Ca 2+ 0.39g / L, K + 0.38g / L,Sr + 0.01g / L) after ultrafiltration, after being treated with a polyether ultrafiltration membrane with a molecular weight of 50,000, it enters the first-stage reverse osmosis roll-type polyamide membrane for desalination at 7Mpa to obtain a pH of brine=7.1 (containing Na + 71.6g / L, Mg 2+ 7.3g / L, Ca 2+ 2.33g / L, K + 2.3g / L,Sr + 0.05g / L); then, the flow rate is 1.5m 3 / h of concentrated seawater (brine) enters and is transported to the pipeline equipped with ultrasonic decalcification probes, the inner diameter of the pipeline is 10 cm, and the interval between every two probes is 20 cm, placed in sequence along the pipeline, a total of 80 ( Keep the brine under ultrasound for a residence time of 5 min). The diameter of the end of the ultrasonic probe used is 10 mm, and the parameters of the ultrasonic treatment are set to an average power density of 1500 W / m 3 , Frequency 20kHz...
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