TH-1 阻垢剂在不同条件下对硫酸钡的阻垢作用

The Sale Inhibition Effect of Scale Inhibitor TH-1 on Barium Sulfate under Different Conditions

李洪建 李雪娇 韩淑彬 李然 唐鑫

LI Hongjian LI Xuejiao HAN Shubing LI Ran Tang Xin

为了研究多因素共同作用时阻垢剂对硫酸钡阻垢效果的影响，采用了化学阻垢法对筛选出的浓度为80mg/L 的钡（锶）阻垢剂TH-1 开展了阻垢效果正交实验，研究了Ba2+浓度、SO42-浓度、pH值、温度以及矿化度这五种因素单独作用时阻垢剂对硫酸钡阻垢效果的影响，并通过正交实验研究了五种因素共同作用时阻垢剂对硫酸钡阻垢效果影响。实验结果表明，ZX-101、TH-1 及TH-607B这三种阻垢剂均表现出较好的阻垢性能，三种阻垢剂的阻垢率随阻垢剂浓度增加呈先增加后减小的趋势，随浓度增加阻垢剂TH-1 的阻垢率比较稳定。五种因素单独作用时，随着Ba2+离子浓度、SO42-浓度的增加，阻垢率呈减小趋势，整体幅度变化不大；随着温度的升高阻垢率先明显升高再缓慢降低；pH值过大或过小均会影响阻垢效率，pH值为7 时，阻垢率最大；随着矿化度的增加，阻垢率先升高后小幅度的降低。通过正交实验可知，当Ba2+浓度为800 mg/L、SO42-浓度为1600 mg/L、温度为75℃、pH值为7、矿化度为65 g/L 时，各因素共同作用阻垢率最大。五种因素中阻垢剂对硫酸钡阻垢效果的影响大小的排序是:Ba2+浓度>矿化度>pH值>SO42-浓度>温度。图6 表4 参14

In order to study the influence of the combined action of multiple factors on the barium sulfate scale inhibition，through the chemical inhibition method，orthogonal experiments on the barium sulfate scale inhibition of screened barium/strontium scale inhibitor TH-1 with the concentration of 80 mg/L were conducted. The single influence on the scale inhibition of Ba2+ concentration， SO42- concentration，pH，temperature and salinity was studied，and especially focused on the combined action of five factors. The results showed that the three kinds of scale inhibitors ZX-101，TH-1 and TH-607B all showed a good scale inhibition performance. The scale inhibition rate of the three scale inhibitors all showed the trend of first increase and then decrease with the increase of inhibitor concentration，and correspondingly，the scale inhibition rate of TH-1 was stable. With the increase of Ba2+ concentration， the scale inhibition rate decreased. With the increase of SO42- concentration，the scale inhibition rate decreased slightly. With the increase of temperature，the scale inhibition rate obviously increased at first and then decreased slowly. An excessive high pH or low pH all reduced the scale inhibition rate，and when the pH value was 7，the scale inhibition rate was the maximum. With the increase of salinity，the scale inhibition rate increased at first and then decreased a little. The orthogonal experiment results showed that under the conditions of Ba2+ concentration at 800 mg/L，the SO42- concentration at 1600 mg/L，the temperature at 75℃ and the salinity at 65 g/L，the scale inhibition rate was the maximum，the scale inhibition rate was the highest. The sequence of the influence on the barium sulfate scale inhibition effect among the five factors was as follows，Ba2+ concentration > pH > salinity > SO42- concentration > temperature.