DESCRIPTION

The Armfield CEP-MKII Stirred Tank Reactors in Series Unit is designed to follow the dynamics of the perfectly mixed multistage process. Dynamic behaviour can be studied as can multistage chemical reaction. Bench mounted and self-contained, the unit requires only to be connected to a single-phase electrical supply for operation.

There are three reactor vessels connected in series, each containing a propellor agitator driven by a variable speed electric motor.

Two reagent vessels and two variable speed feed pumps feed reagents into the first reactor in line.

For certain experiments the feed can be connected to the third reactor and a dead time coil, also positioned on the vacuum formed plinth.

Each reactor and the exit port of the dead time coil are fitted with conductivity probes for monitoring the process.

Conductivity is displayed on a digital meter on the console through a selector switch and all four probes are connected to the supplied Armfield data logging accessory.

TECHNICAL SPECIFICATIONS

• A self-contained bench mounted small scale unit fitted with three continuous stirred reactors in series which are fed from two 5l tanks. Each reactor is fitted with a conductivity probe
• There are two independent, variable speed feed pumps
• A dead time residence coil can also be attached to the exit of the last reactor in the series
• Demonstration capabilities:
  – Investigation of dynamic behaviour of stirred tank reactors in series
  – Influence of flow rate and step input change
  – Investigation of chemical reaction in a three-tank system
  – Investigation of time constant using a dead time coil

EXPERIMENTAL CONTENT

• Investigation of dynamic behaviour of stirred tank reactors in series
• Effect of step input change
• Response to an impulse change
• Influence of flow rate
• Investigation of time constant using a dead time coil
• Investigation of chemical reaction in a three-tank system

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