ABSTRACT
This chapter begins with an introduction on sources of particulate emissions, particulate removal and types of commonly-used removal devices, and characteristics of gas stream and particulate that are relevant to particulate removal. It describes particle size, particle size distribution, particulate Reynolds numbers and detailed discussion on particulate removal mechanisms. The chapter presents principles, commonly-used systems and their components, important design considerations, and design calculations related to gravity settling chambers. It provides those of cyclones, electronic precipitators, fabric filters, and wet scrubbers. The chapter summarizes important considerations in selection of proper particulate removal devices. Particles are being emitted to the atmosphere from natural processes and human activities. Some particles are formed in the atmosphere. Temperature of the influent gas stream is an important parameter. For example, fabric materials used in some filters may not be able to stand elevated temperatures. There are several types of particle size measurement devices, including microscope, optical counter, electrical aerosol analyzer, Bahco counter, and inertial impactor.
