Preparation, characterization and performance of drag reduction agent used in pipeline of brine mining and transportation
- LIAN Lu, HAN Xiangsheng, ZHANG Changqiao, YU Ping, WEI Yunhe
JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE). 2017, 47(2):
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In order to reduce the energy consumption of the deep brine extraction process, the research on heat resistance and salt tolerance of halogen pipeline drag reduction agent has important practical significance. The synthesis of P(AM/AMPS/AA)adopted redox system by initiated acrylamide(AM)and 2-acrylamide-2-methyl-1-propanesulfonic acid(AMPS)and acrylic acid(AA)in aqueous solution was studied. The optimum experimental conditions were obtained by orthogonal experimental design and online reaction infrared spectrogram. The optimum conditions were as the followings, temperature was 30 ℃, pH value was 1, the monomer mass ratio was 15∶3∶2, the initiator concentration was 0.04%, and the optimized reaction time was 3 h.The structure of P(AM/AMPS/AA)was characterized by FTIR and 1H NMR, and the molecular weight was tested by MALLS. The drag reduction performance of the synthetic polymer was tested on a self-made test pipeline, and the polymer showed better heat resistance and salt resistance, and the drag reduction effect was obvious.When the simulation of brine salinity was 150 g/L, the water temperature was 15 ℃, the flow rate was 950 L/h, the dosage was 20 mg, the polymer drag reduction rate could reach 41.2%. Compared with the existing drag reducing agent, the drag reduction performance was greatly improved, which would have good development and application.