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发明公开
CN109678159A 一种氟硅酸清洁浓缩方法 无效 - 撤回

一种氟硅酸清洁浓缩方法
摘要：
本发明公开了一种氟硅酸清洁浓缩方法，该方法用流量泵向预热器内打入质量浓度为10%-15%的稀氟硅酸，将待浓缩的氟硅酸温度预热至65℃-70℃；氟硅酸的进料量控制在3m³/h-4m³/h；开启浓缩系统的真空泵，保证真空度为-0.08MPa到-0.09MPa；将预热后的氟硅酸输送至浓缩系统，调整浓缩系统的回流比为2：1到3：1；温度控制在50℃到70℃之间；浓缩后氟硅酸的质量分数控制在23%到26%之间；浓缩出来的气液混合物经绝热闭式冷却系统分离，氟硅酸经泵打入储罐，水蒸气进入凉水塔。本发明的方法能耗低、效率高，可用于工业化连续生产，且浓缩过程中氟硅酸不分解。
摘要（英）：

The invention discloses a clean concentration method of fluosilicic acid. The method comprises the following steps: pumping dilute fluosilicic acid with the mass concentration of 10 to 15 percent intoa preheater by using a flow pump and preheating the temperature of to-be-concentrated fluosilicic acid to 65 to 70 DEG C; controlling the feeding amount of the fluosilicic acid at 3m<3>/h to 4 m<3>/h; starting a vacuum pump of a concentration system and ensuring the vacuum degree at -0.08MPa to -0.09 MPa; transporting preheated fluosilicic acid to the concentration system, adjusting the reflux ratio of the concentration system to 2:1 to 3:1 and controlling the temperature between 50 and 70 DEG C; controlling the mass fraction of the concentrated fluosilicic acid between 23 and 26 percent; separating a concentrated gas-liquid mixture through an adiabatic closed cooling system, pumping the fluosilicic acid into a storage tank by the pump and enabling water vapor to enter the cooling tower.The method disclosed by the invention has the advantages of low energy consumption, high efficiency and capability of being used for industrial continuous production; in addition, the fluosilicic aciddoes not decompose in the concentration process.

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