Page 215 - 《精细化工》2020年第12期
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第 12 期                     罗兴国,等:  真空制盐中碳酸根离子的转化与阻垢防垢                                   ·2577·


                 其中,A 为垢层在 pH=11.82 硝系统母液中溶解                       CaCO 3—Effect of temperature under the influence of EDTA (di sodium
            1 h 所得的溶解渣,B 为垢泥在 pH=8.59 的硝系统母                        salt)[J]. Desalination, 2012, 297(1): 38-47.
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            液中溶解 1 h 所得到的溶解渣。结合 SEM 图和 EDS                         for mixed calcium carbonate and calcium sulfate precipitation[J].
            分析可知,比较致密且棱角分明的晶体是 CaCO 3 的                            Chemical Engineering Science, 2001, 56(18): 5391-5400.
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            方解石型晶体,白色圆形颗粒为 Mg(OH) 2 晶体。经                           scale inhibition by PAA, ATMP and PAPEMP[J]. Desalination, 2008,
            硝系统母液溶解后,吸附在 CaCO 3 晶体表面的白色                            228(1): 55-60.
            微细颗粒的数量以及晶体表面的絮状物明显减少。                             [7]   YANG W J (杨文俊), YANG Y (杨云), YANG L M (杨丽梅), et al.
                                                                   Experimental study on brine purification with “lime-flue gas” process
            结果表明,在所设定的溶解实验条件下,Mg(OH) 2                             [J]. China Well and Rock Salt (中国井矿盐), 2007, 38(5): 29-31.
            垢可以得到有效地溶解,但仅有少部分的 CaCO 3       垢                  [8]   YANG W J (杨文俊), YANG  B X (杨炳鑫). Measures of brine
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                 综上所述,调节硝系统母液 pH 至 8.59 能使垢                    [9]   LI Y M (李叶萌), WANG X K (王学魁), HU C H (胡彩花), et al.
                      2+
                                         2+
            泥中的 Mg 有效溶解,部分 Ca 被溶解。未被溶解                             Scale prevention and scale removal method in vacuum salt making
                                                                   [J]. Journal of Salt and Chemical (盐业与化工), 2007,36(2): 34-38.
                  2+
            的 Ca 在卤水和换热管之间形成了一层较薄的垢                            [10]  ZAHID A, PETOS G K. Evaluation of maleic acid based polymers as
            层,避免了 pH 偏中性的硝系统母液直接接触换热                               scale inhibitors and dispersants for industrial water  applications[J].
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                          2–
                                       –
            管,在实现 CO 3 转化为 HCO 3 的同时,也在一定程                     [11]  LUO X H (罗小辉), YANG Z Y (杨志勇), CHEN Y (陈勇), et al.
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            3   结论                                             [12]  LI P Z (李佩珍). Brief discussion on the pipe plugging and prevention
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            子的分布及实际生产情况分析可知,盐硝蒸发系统                                 of heat exchanger in nitrate system[J]. China Well and Rock Salt (中
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            垢泥主要由 CaCO 3 垢和少量的 Mg(OH) 2 垢组成,但                  [14]  YANG J (杨进). Prevention and control of scaling in sodium sulfate
            结垢机理有所区别。盐系统结垢的诱因是,逐效富                                 type brine vacuum salt making device[J]. China Well and Rock Salt
                   2+
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            达到过饱和状态沉积析出形成垢层;硝系统结垢的                                 prevention methods in the salt making production[J]. China Well and
                                2–
                                       –
            主要原因是卤水中 CO 3 和 OH 的成倍富集。                              Rock Salt (中国井矿盐), 2015, 46(3): 9-12.
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                (2)结合理论计算和实验结果,通过两段调节                              of calcium carbonate and barium sulfate scale with and without scale
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                                                                   50(9): 5852-5861.
                                   –
                      2–
            少量的 CO 3 转化为 HCO 3 。因此,通过调控 pH 使                   [17]  MENG S Q (孟素青). Brief discussion on the prevention of evaporator
                            –
               2–
            CO 3 转换为 HCO 3 ,实现阻垢在理论和实验中是可                          V scaling of gypsum type brine[J]. China Well and Rock Salt (中国
            行的。                                                    井矿盐), 2014, 45(3): 12-13.
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                (3)SEM-EDS 检测和垢泥的成分分析表明,调                          Experimental study on carbonization  reaction of brine purification
                                                     2+
            节硝系统母液 pH 至 8.59,能使垢泥中的 Mg 有效                          with “lime-flue gas” process[J]. Journal of Salt and Chemical (盐业
                                                                   与化工), 2010, 39(1): 24-26.
                                                 2+
                          2+
            溶解,部分 Ca 被溶解。未被溶解的 Ca 在换热管                         [19] YANG W (杨卫), JIAO L D (焦临德). Application of brine purification
            表面形成较薄的垢层,抑制了换热管腐蚀的进程。                                 with lime-flue gas  method in  Xiangtan Salt  Chemical  Co., Ltd.[J].
                            2–
                                         –
            因此,在实现 CO 3 转化为 HCO 3 、缓解系统结垢、                         Journal of Salt and Chemical (盐科学与化工), 2013, 42(2): 40-42.
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