Hazard/Event Problem Identification
Hazard or event identification provides information on situations or chemicals and their releases, which can potentially harm the environment, life, or property. Information that is required to identify chemical hazards includes chemical identities; quantities and location of chemicals in question; and chemical properties such as boiling points, ignition temperatures, and toxicity to humans. This chapter provides details on a number of commonly used process units: reactors, heat exchangers, columns of various types (distillation, absorption, adsorption, evaporation, and extraction), dryers, and grinders. The reactor is often the heart of a chemical process. It is the place in the process where raw materials are usually converted into products, and reactor design is therefore a vital step in the overall design of the process. The transfer of heat to and from process fluids is an essential part of most chemical processes. The most commonly used type of heat transfer equipment is the shell and tube heat exchanger.