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rocess

Chemical Process

Industries

Methods of changing or

refining raw materials to

create end products

Chemical Process Control

Methods that are used tocontrol process variables

when manufacturing a

product

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CHEMICALPROCESS

CONTROL

WHAT

WHY

WHEREHOW

WHEN

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you drive your car while ..

What if.

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POSSIBLE ???

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IMPORTANCE OF PROCESS CONTROL

SAFETY

PRODUCT QUALITY

PRODUCTION RATES

REDUCE ENERGY

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What does a control system do? Maintain certain variables within some limit

e g temperature in a room

Why we need to control a process? Because processes are dynamicchanges always

occurred, and processes are not in steady state.

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There are many applications where part or all

of a process has to be controlled. e.g. temperature

pressure

flow

level composition

others

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Manual Control Before process automation, people, rather than

machines, performed many of the process controltasks. Control operations that involve human actionto make an adjustment are called manual controlsystems.

Automatic Control Control operations in which no human intervention

is required, are called automatic control systems

Thought of the day ..

You use manual contro l every d ay ... .. .LIST SOME of THEM .

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Process (System)

Process(System)

Raw Materials (Input)

Products (output)

Question of the day ..

In every systems, there are variables . What is variable ?