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Selection and applications4 min readContent language: ChineseUpdated 23 October 2026

在线酸碱浓度计:颗粒和浆料能否直接测?

悬浮物影响与测量原理和取样方法有关。化验需说明过滤与未过滤基准。

直接回答与核心机制

悬浮物影响与测量原理和取样方法有关。颗粒的尺寸、浓度、沉降和磨损会改变样品代表性及传感状态。不能用一个液体标定结论覆盖所有浆料。

浆料的目标量可能是总体混合物物性,也可能是经模型换算的固体质量分数。若固相滑移、沉降或被取样管选择性截留,在线与实验室就不再观察同一组分比例。需要核对粒径、固液密度及取样保真,清水标准通过不能自动覆盖含颗粒工况。固相滑移尤其需要关注。

测量条件与适用关系

在线酸碱浓度可利用电导率、折光率、密度或声速等物性求得,具体原理必须先确认;pH反映氢离子活度相关状态,不等于任意强酸强碱的质量分数。

电导随酸碱浓度变化时,离子数量、迁移能力及相互作用可能同时改变,某些范围会出现转折,因此同一电导未必唯一对应质量分数。折光或声速等路线也依特定组成模型,不能因输出写酸浓度就具有成分专一性。盐和反应副产物独立变化时,需重新评价可辨识范围。pH的酸碱状态与投料质量分数不是同一量,不能用一个通用系数互换。

颗粒和液体是否同步通过敏感区决定读数含义。

本题的具体核对

  • 化验需说明过滤与未过滤基准。
  • 记录粒径、固体性质、流动状态与离线取样方法。

假设案例与判别证据

假设一个在线酸碱浓度计项目遇到以下情况:一份取样的固体较多,另一份较少,在线仪表被误判失准。

检查两份样品的取样高度、等待与混匀是否一致。若固液比例已经不同,不能用它们的差值评价在线准确度,应先恢复同一对象的有效参考比较。

边界与需提交的材料

同一种酸碱的物性浓度曲线也可能非单调,盐分及副产物可造成交叉干扰。只在已确认的成分、浓度与温度范围内使用相应模型。

提供酸碱名称、质量分数范围、盐分杂质、温度和现有原始物性及化验方法。

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Sales and technical teams

Record customer questions with application conditions. Verify range, interfaces and operating requirements against the selected model documentation.

Turn questions into application requirements

Collect application, connection, installation and acceptance requirements for the selected product, then review open points with DOWESTON.

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