eBook - ePub
Air Pollution Control Engineering for Environmental Engineers
Fundamentals and Applications
Jeff Kuo, Jeff Kuo
This is a test
Partager le livre
- 368 pages
- English
- ePUB (adapté aux mobiles)
- Disponible sur iOS et Android
eBook - ePub
Air Pollution Control Engineering for Environmental Engineers
Fundamentals and Applications
Jeff Kuo, Jeff Kuo
DĂ©tails du livre
Aperçu du livre
Table des matiĂšres
Citations
Ă propos de ce livre
Air pollution control and air quality engineering are some of the key subjects in any environmental engineering curriculum. This book will cover topics that are fundamental to pollution control engineers and professionals, including air pollution and its management through regulatory approaches, calculating and estimating emissions, and appying con
Foire aux questions
Comment puis-je résilier mon abonnement ?
Il vous suffit de vous rendre dans la section compte dans paramĂštres et de cliquer sur « RĂ©silier lâabonnement ». Câest aussi simple que cela ! Une fois que vous aurez rĂ©siliĂ© votre abonnement, il restera actif pour le reste de la pĂ©riode pour laquelle vous avez payĂ©. DĂ©couvrez-en plus ici.
Puis-je / comment puis-je télécharger des livres ?
Pour le moment, tous nos livres en format ePub adaptĂ©s aux mobiles peuvent ĂȘtre tĂ©lĂ©chargĂ©s via lâapplication. La plupart de nos PDF sont Ă©galement disponibles en tĂ©lĂ©chargement et les autres seront tĂ©lĂ©chargeables trĂšs prochainement. DĂ©couvrez-en plus ici.
Quelle est la différence entre les formules tarifaires ?
Les deux abonnements vous donnent un accĂšs complet Ă la bibliothĂšque et Ă toutes les fonctionnalitĂ©s de Perlego. Les seules diffĂ©rences sont les tarifs ainsi que la pĂ©riode dâabonnement : avec lâabonnement annuel, vous Ă©conomiserez environ 30 % par rapport Ă 12 mois dâabonnement mensuel.
Quâest-ce que Perlego ?
Nous sommes un service dâabonnement Ă des ouvrages universitaires en ligne, oĂč vous pouvez accĂ©der Ă toute une bibliothĂšque pour un prix infĂ©rieur Ă celui dâun seul livre par mois. Avec plus dâun million de livres sur plus de 1 000 sujets, nous avons ce quâil vous faut ! DĂ©couvrez-en plus ici.
Prenez-vous en charge la synthÚse vocale ?
Recherchez le symbole Ăcouter sur votre prochain livre pour voir si vous pouvez lâĂ©couter. Lâoutil Ăcouter lit le texte Ă haute voix pour vous, en surlignant le passage qui est en cours de lecture. Vous pouvez le mettre sur pause, lâaccĂ©lĂ©rer ou le ralentir. DĂ©couvrez-en plus ici.
Est-ce que Air Pollution Control Engineering for Environmental Engineers est un PDF/ePUB en ligne ?
Oui, vous pouvez accĂ©der Ă Air Pollution Control Engineering for Environmental Engineers par Jeff Kuo, Jeff Kuo en format PDF et/ou ePUB ainsi quâĂ dâautres livres populaires dans Business et Infrastrutture. Nous disposons de plus dâun million dâouvrages Ă dĂ©couvrir dans notre catalogue.
Informations
Chapter 6
Control of Particulate Emissions
Particulate matter (PM) is one of the six criteria pollutants. Reducing particulate emissions from stationary source is vital to achieve good ambient air quality. There are many types of control devices available, and removal mechanisms of these devices vary. Characteristics of particulates and of the gas stream will have significant impacts on their removal.
This chapter starts 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 (Section 6.1). Section 6.2 describes particle size, particle size distribution, particulate Reynolds numbers and detailed discussion on particulate removal mechanisms. Principles, commonly-used systems and their components, important design considerations, and design calculations related to gravity settling chambers are presented in Section 6.3. Those of cyclones, electronic precipitators, fabric filters, and wet scrubbers are presented in Sections 6.4, 6.5, 6.6, and 6.7, respectively. Section 6.8 summarizes important considerations in selection of proper particulate removal devices.
6.1 Introduction
Particulate matter (PM) is a general term that describes solid particles and liquid droplets present in the atmosphere and gas streams. An obvious effect of PM pollution is reduction of visibility. Emission from a stack or a tail pipe is visible mainly because of the PM it carries. Elevated PM concentrations in the ambient air also pose threats to human health, ecosystem, and the environment.
6.1.1 Sources of particulate emissions
Particles are being emitted to the atmosphere from natural processes and human activities. Some particles are formed in the atmosphere. Solid particles can be generated from mechanical action (e.g., grinding), chemical reactions (e.g., metal oxides), and incomplete combustion (e.g., carbon black). Liquid particles can be generated from chemical reactions and condensation.
Primary particles are those released directly from sources to the atmosphere. They include wind dusts, ocean sprays, volcano ash, and carbon black from combustion sources. Secondary particles are those formed in the atmosphere from chemical reactions involving primary gaseous pollutants. Examples of secondary particles are ammonium sulfate ((NH4)2SO4) and ammonium nitrate (NH4NO3), formed from gaseous emissions from various combustion sources. When compared to primary particles, they are much smaller in size and represent a large portion of PM25 in our ambient air.
Tables 6.1 and 6.2 tabulate the PM10 and PM25 emissions from main sources categories in the U.S. in 2017. The total emissions are 18.1 and 5.3 million tons for PM10 and PM2.5, respectively. Contributions to PM10 emissions are 86.6, 4.8, 6.1, and 2.5% from miscellaneous, stationary fuel combustion, industrial and other processes, and transportation, respectively. Contributions to PM2.5 emissions are 69.3, 14.0, 11.3, and 5.4% from miscellaneous, stationary fuel combustion, industrial and other processes, and transportation, respectively. Miscellaneous source category (e.g., w...