绿色阻垢剂对地热流体碳酸钙垢的阻垢性能与机理
谷永 , 胥博文 , 王惠荣 , 时光伟 , 郑晓菲 , 阮传侠
现代化工 ›› 2025, Vol. 45 ›› Issue (S2) : 163 -169.
绿色阻垢剂对地热流体碳酸钙垢的阻垢性能与机理
Scale inhibition performance and mechanism of green scale inhibitor for calcium carbonate scale in geothermal fluid
通过研制新型绿色复配阻垢剂HPMA-AMPS-PAA,并利用6种实际地热流体验证其阻垢性能。研究结果表明,当HPMA、AMPS和PAA投加量分别为2、6 mg/L和8 mg/L时,复配阻垢剂较单一阻垢剂阻垢率提升25.92%,在200℃高温或 pH=9条件下,停留时间为24 h时仍可保持80%以上阻垢率,同时Na+、K+、Mg2+等离子由于盐效应可进一步提升阻垢效果。通过对阻垢机理研究得出,HPMA-AMPS-PAA通过晶格畸变、螯合和分散协同作用,促使碳酸钙从方解石向球霰石晶型转变,有效抑制碳酸钙生长。
A novel green composite scale inhibitor,HPMA-AMPS-PAA,is developed,and its scaling inhibition performance is validated through using six kinds of actual geothermal fluid.Results indicate that the composite scale inhibitor with HPMA,AMPS,and PAA dosages of 2,6,and 8 mg/L,respectively exhibits a 25.92% improvement in scaling inhibition efficiency compared to single scale inhibitor.It maintains a scaling inhibition rate of over 80% even after 24 h at 200℃ or pH=9.Additionally,the presence of Na+,K+,and Mg2+ further enhances the scaling inhibition effect due to the salt effect.Through studying its mechanism,it is found that HPMA-AMPS-PAA induces a transformation of calcium carbonate from calcite to vaterite crystal form through synergistic effects of lattice distortion,chelation,and dispersion,which inhibiting calcium carbonate growth effectively.
地热 / 协同阻垢机理 / 热动力学因素影响 / 绿色阻垢剂 / 结垢
geothermal energy / synergistic scale inhibition mechanism / influence of thermodynamic factors / green scale inhibitor / fouling
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国家自然科学基金项目(42272308)
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