Process Control and Instrumentation

Abstract

Proper control of the operations and various reactions is essential for safe, efficient, and pollution-free working of a chemical plant. This can result in proper conversion of the raw materials to finished products and minimise their wastage. It also minimises breakdowns of process units and plant machinery and improves the product quality and reputation of the organisation.

The process parameters shall be monitored by installing sensors of the instruments at the right place in the process units and pi**. Sampling arrangement should be properly designed. Certain practical guidelines are also given for precautions to be taken while providing instruments and connecting cables.

Choice of feed forward or feedback control depends on the knowledge of relationship of control action with the parameter being controlled; upper and lower set points (allowable deviation from required value) and response time of system.