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pH 的连续检测和控制,对于化工、生化等反应的进行和环境保护具有十分重要的意义。下面以一个搪瓷厂化学清洗车间的工业碱性污水 pH 连续检测和控制为例作一介绍。该车间生产过程中污水排放流量为10T/h 左右,pH 值为8～14,要求设计一套自动控制装置进行 pH 连续自动控制,使排出污水达到国家环境保护允许的 pH 值7.5左右。
Continuous detection and control of pH are of great significance to the progress of chemical, biochemical and other reactions and environmental protection. The following is an enamel factory chemical cleaning workshop of industrial alkaline sewage pH continuous detection and control as an example for an introduction. The sewage discharge flow in the workshop during the production process is about 10T / h and the pH is 8-14. It is required to design an automatic control device for continuous and automatic pH control so that the effluent will reach the pH value of about 7.5 permitted by the national environmental protection.