Lecture 2 Control Instrumentation 1.P&ID, PFD 2.Control Hardware Elements 1.Sensor / Transducer 1.Actuator 2.Controller -Do I have confident feeling of.

Lecture 2 Control Instrumentation

1. P&ID, PFD

2. Control Hardware Elements

1. Sensor / Transducer

1. Actuator

2. Controller

- Do I have confident feeling of understanding practical control elements?Chem. Eng. Process Control

06-205 Chemical Engineering Process Control © Il Moon

1. P&ID, PFD

Chem. Eng. Process Control 1

Chem. Eng. Process Control 2

2. Control Hardware Elements

(Marlin)

Process

Sensor / Transducer

Chem. Eng. Process Control 3

3. Sensor / Transducer

(SEM)

Chem. Eng. Process Control 4

4. Actuator

* Valve characteristics

- flow rate

- flow characteristics

Linear :

Quick opening :

Equal percentage :

Chem. Eng. Process Control 5

(SEM)

5. Controller

ControllerPV

SP

CO

Chem. Eng. Process Control 6

Sensor /Transmitter

Controller

T y

T y

Chem. Eng. Process Control 7

1. Sensor

- Temperature : thermocouples, RTD, bimetal, pyrometer - Pressure : manometer, bellows, diaphragm, strain gauges - Flow : orifice, venturi, turbine, ultrasound - Liquid Level : float, displacer, conductivity, head pressure - Composition : GC, IR, UV, conductivity meter, potentiometry, pH, spectrometer

2. Controller

- PID, DDC

3. Actuator

- valve, pump, motor

4. Transmitter

4~20mA, 3~15psig

Summary