Chlorinator Controls

Figure 7.42.3 is a schematic typical of systems with variable quality and flow rate. The chlorinator has two oper-

FIG. 7.42.1 Batch oxidation of cyanide waste with chlorine.
FIG. 7.42.2 Batch cyanide treatment.

ators: one controlled by feedforward, the other by a feedback loop.

Most reactions are completed within 5 min. Except for cyanide treatment, most other chemical oxidation operations occur simultaneously with other unit operations, such as coagulation and precipitation, which govern the pH value. Although pH value affects the rate of reaction, it is seldom controlled solely for the oxidation process.

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