Field Tests of Produced Water Atomization Evaporation in a High Salinity Gas Field
The membrane treatment of produced water from high salinity gas fields produces a large amount of concentrated brine.Concentrated brine is often evaporated using thermal distillation methods such as multi effect evaporation and mechanical compression evaporation,which have the disadvantages of high processing cost and difficulty.Combined with confined space evaporation and rotary atomization technology,a pilot plant for produced water evaporation was developed.Field tests have shown that within a certain range,small droplet diameters,low wind speeds,and high installation of atomizers can help ensure evaporation efficiency.Meanwhile,appropriate parameter selection can prevent incomplete evaporation of fog droplets from drifting out of the device.During field testing and operation,a typical operating condition is to set a fixed speed of 3200 rpm without frequency conversion,with a water inlet flow range of 1.0～1.2 m3/h,a motor power consumption of 1.5 kW,a height of 4m for the atomizer,and a diameter of 150 μm droplets.When the ambient temperature is greater than 20℃and the relative humidity of the air is less than 80%,the evaporation reduction rate can be maintained at more than 50%,which can effectively achieve the reduction treatment of high salinity produced water,reduce the subsequent thermal distillation process load,and reduce the overall treatment cost of gas field produced water.
gas fieldmechanical atomizationsaline wastewaterevaporation effectfield test
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