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MOD 30ML Demonstration Guide
Introduction
Control of a batch reactor includes sequential and continuous elements, and tight control of the reaction
temperature. Ideally, only one device is used to perform both types of control, with a common local display
interface providing complete process information. The following demonstration will show:
•
integration of automatic sequential and continuous control
•
front panel display of sequence steps
•
cascade control
•
front panel recipe selection and entry of recipe data
•
manual control of sequence steps through front panel
The Control System
The batch reaction is conducted according to a definite time-temperature cycle. Figure 1 illustrates a typical
cycle of many industrial processes.
Reactants are added to the reactor at room temperature; the reaction mass is heated to reaction temperature;
the reaction is carried out to form products; the batch is cooled; and the reactor is emptied. Total batch time
in reactors used in the manufacture of PVC or polystyrene, for example, is approximately fourteen to
eighteen hours. The progression of the batch cycle is controlled by the sequence operation. It may
sometimes be necessary for the operators to pause, stop, or manually advance the cycle to another step.
REACTOR.DOC 11/8/99
INDUSTRY: Chemical / Pharmaceutical
Unit Reactor Control
ABB Instrumentation
Batch Reactor Demonstration
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Table of Contents
Related Manuals for ABB MOD 30ML
Summary of Contents for ABB MOD 30ML
- Page 1 ABB Instrumentation MOD 30ML Demonstration Guide INDUSTRY: Chemical / Pharmaceutical Unit Reactor Control Introduction Control of a batch reactor includes sequential and continuous elements, and tight control of the reaction temperature. Ideally, only one device is used to perform both types of control, with a common local display interface providing complete process information.
- Page 2 TIC-202 Steam Drain Demonstration Guide The MOD 30ML is performing the process simulation as well as the sequence control and temperature cascade control. Once started, the batch cycle will progress automatically unless it is switched to manual mode. Operator Changes...
- Page 3 The main batch display is arranged as shown below: MODCELL 2050 Selected recipe RECIPE 1 Mode or AUTO Time in Step Change mode (auto/manual) Batch status (OFF/RUN) Start/stop batch Temp SP Temperature setpoint Steps (cumulative) Current step Activity: Step through the tag displays (Main batch display, TIC-100, TIC-101, Fill ) Look for: Batch in AUTO, OFF (non running), setpoint LOC Master temperature controller TIC-100 setpoint 100ºF...
- Page 4 Activity: Press NXT key to view recipe parameters Look for: Reaction temperature setpoint entry Reactor level Fill A rate Fill B rate Activity: Change Recipe 1 target level to 15 inches water Benefit: Recipe data can be entered from the front panel without the need of an external data entry terminal Activity: Press the TAG key to return to main Batch display...
- Page 5 Activity: When controller has entered HEATUP step, scroll to temperature control displays Look for: Cascade control for temperature is now active Master controller setpoint value ramps to 111ºF Benefit: Continuous control is completely integrated with sequential control without the need for an external device Cascade with full tracking provides tight temperature control Activity: When batch cycle has entered HOLD step, return to main batch display...