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Safety System for Reactor Temperature Control

Learn about a safety system for controlling reactor temperature to prevent catastrophic runaway reactions. The system monitors temperature, triggers alarms, and shuts off streams to maintain safe operating conditions.

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Safety System for Reactor Temperature Control

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  1. Example The following figureshows a reaction system in which the temperature increases with the feed rate of flow-controlled stream D. Heat is removed by water circulation through an exchanger. Normal reactor temperature is 200 F, but a catastrophic runaway will start if the reactor temperature reaches 300 F.

  2. Example In view of this situation, • The reactor temperature is monitored; • Rising temperature is alarmed at 225 F 9see horn); • An interlock shuts off stream D at 250 F, stopping the reaction (see solenoid and valve A); • The operator can initiate the interlock by pushing the panic button.

  3. Assumptions • Secondary failures are neglected. • The alarm signal always reaches the operator whenever the horn sounds

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