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为了降低深层卤水提输过程的能耗,开展耐温耐盐的提输卤管道用减阻剂研究具有重要的现实意义。以丙烯酰胺(AM),2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和丙烯酸(AA)为单体,采用氧化还原引发剂体系水溶液聚合法合成耐温耐盐的提输卤管道用减阻聚合物P(AM/AMPS/AA)。以聚合物在常温卤水管道中的减阻率为考核指标,设计四因素三水平正交试验,确定最佳合成条件为:反应系统pH为1,反应温度为30℃,单体质量配比为m(AM)∶m(AM PS)∶m(AA)=15∶3∶2,引发剂加入质量为单体总质量的0.04%。根据在线红外分析结果确定最佳反应时间为3 h。利用FTIR和1H NM R等手段对P(AM/AM PS/AA)的结构进行表征并用多角激光光散射仪测定其分子量。在自制的减阻率测试环道上对合成聚合物的减阻性能进行测试,合成聚合物表现出较好的耐温耐盐性能,减阻效果明显。如在模拟卤水质量浓度150 g/L、水温15℃、流量950 L/h、减阻剂用量为20 mg时,合成减阻聚合物的减阻率可以达到41.2%。与现有减阻剂相比,合成的P(AM/AMPS/AA)减阻聚合物减阻性能大幅度提高,具有较好的开发应用前景。
In order to reduce the energy consumption in the process of deep brine transportation, it is of great practical significance to carry out the research of drag reducing agent for brine pipeline with temperature and salt tolerance. Synthesis of salt-tolerant salt halide with AM and 2-acrylamide-2-methylpropane sulfonic acid (AMPS) and acrylic acid (AA) as monomer using aqueous redox initiator system Drag reducing polymer for pipe P (AM / AMPS / AA). Taking the drag reduction rate of polymer in brine pipeline at normal temperature as evaluation index, orthogonal experiment of four factors and three levels was designed and the optimal synthesis conditions were as follows: reaction system pH was 1, reaction temperature was 30 ℃, monomer mass ratio m (AM): m (AM PS): m (AA) = 15: 3: 2, the mass of the initiator is 0.04% of the total mass of the monomer. According to the results of online infrared analysis, the best reaction time was 3 h. The structure of P (AM / AM PS / AA) was characterized by means of FTIR and 1H NM R, and its molecular weight was determined by polygonal laser light scattering. The drag reduction performance of the synthesized polymer was tested in a self-made drag reduction test loop. The synthesized polymer showed better temperature and salt tolerance with obvious anti-drag effect. For example, the drag reduction rate of the synthetic drag reducing polymer can reach 41.2% when the simulated brine concentration is 150 g / L, the water temperature is 15 ℃, the flow rate is 950 L / h and the amount of drag reducer is 20 mg. Compared with the existing drag reducer, the drag reduction performance of the synthesized P (AM / AMPS / AA) drag reducing polymer greatly improves, and has good development and application prospects.