Temperature Indicators and Transmitters

Thermocouples were installed at five points over the length of the column and at the condenser outlet. The thermocouples are connected to a switching unit and to a panel mounted display. Only one temperature can be viewed at a time. The display also produces a 4-20 mA signal that can be used as a controller input, if required. The thermocouple labels and positions are shown in Table 11.5. Each measurement is accurate to approximately ±0.1 °C.

Table 11.5- Thermocouples

Label

Location

Tl

Condenser outlet

T2

Column overhead

T3

Above reactive section

T4

Above stripping section

T5

Mid-stripping section

T6

Column bottom

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