Howard D. Hesketh

This manual will serve a useful function in training and giving experience to environmental scientists at all levels. Included in this manual are explanatory materials, exercises and experiments. These are intended as training guides. The users of this manual will find it possible to use simple equipment and naturally occurring events to construct some of the needed equipment but may also find it necessary to use commercially available equipment with some of the procedures.

A basic technical book on the design and application of gas cleaning technologies that use liquids, first published in the 1980's and used by plant and environmental engineers, regulatory personnel, and others concerned with air pollution. The second edition enlarges the discussion on the theory of

Since the first edition was printed in 1991, there have only been minor changes in air regulations. The opposing "trenches" used by environmental regulation proponents have deepened as each side increases their database. Agencies and environmental groups have backed off a little in issues such as bubble policies and enforcement time tables. This has made it extremely difficult for equipment vendors to anticipate industry requirements. Overall, the current market projections are not very favorable for the new equipment suppliers. In contrast, the service organizations are seeing increasing need for their help in areas such as dispersion modeling, troubleshooting and testing. Existing systems are being improved upon to keep them in operation. There remains a continuous need for up-to-date references and training materials to serve these needs, and it is for this purpose this revised edition is dedicated.

This book is build upon the base of the design and application of gas cleaning technologies that use liquids. It includes the theory of operation of wet scrubbers, new "hybrid" scrubber systems that use multiple control techniques, and irrigated fiberbed filters that utilize Brownian motion capture.

From the Preface The Clean Air Act Amendments (CAAA) of 1990 significantly affect commercial and industrial combustion devices such as boilers, incinerators, and other burners. Under the new emission regulations already promulgated and those being developed, compliance will require improved equipment, more detailed operator training, new permits, more complex monitoring and reporting, as well as other requirements. All emissions must be considered, e.g., particulates and gases (acid, organic, hazardous, NOx, ozone). Many industrial boiler plants have been retrofitted to change fuel and/or combustion operating conditions as a means to meet new air pollution control requirements. New regulations will continue to be developed by the CAAA of 1990 that will require changes to other boilers and combustion systems. This book is intended to acquaint industry with the equipment and operating options that are available to reduce emissions while controlling costs. Specific topics are addressed, including regulatory requirements, boiler and burner equipment retrofits, combustion modification, air emission control and monitoring equipment selection, maintenance, and cost. The twelve chapters of this book are written by seven different authors. The authors use fifty-two figures and forty-four tables to help explain the written text and to make it more interesting and useful to readers.

This manual will serve a useful function in training and giving experience to environmental scientists at all levels. Included in this manual are explanatory materials, exercises and experiments. These are intended as training guides. The users of this manual will find it possible to use simple equipment and naturally occurring events to construct some of the needed equipment but may also find it necessary to use commercially available equipment with some of the procedures.

This book is designed to acquaint the reader with current regulations and with the necessary information to size air pollution control systems. The material presented should also help enable one to select the appropriate equipment for retrofit or new process control, to prepare specifications to purchase equipment, and to prepare permits for air pollution control systems. Sizing and Selecting Air Pollution Control Systems provides guidance to help those responsible for air pollution control to specify systems which are cost-effective and energy-efficient to meet the needs of their employers and the government. When equipment specifications are properly prepared, they provide for an easier comparison of competitive bids of those devices capable of meeting standards reliably and economically.