1st Edition
Local Exhaust Ventilation Aerodynamic Processes and Calculations of Dust Emissions
Control Harmful Emissions and Improve Work Conditions
Local Exhaust Ventilation: Aerodynamic Processes and Calculations of Dust Emissions examines how emissions inherent to production processes in the metal, mining, chemical, and other industries can adversely affect the workplace by compromising a worker’s health and/or contributing to the deterioration of equipment quality and performance. Professionals concerned with the aerodynamics of dust control ventilation, particularly at industrial plants, can greatly benefit from this book.
This text considers the impact of emissions exposure to occupational safety and health and the environment, explores the practical purposes of industrial ventilation, and outlines how local exhaust ventilation can help control the emission of harmful substances in industry. The book outlines methods used for surveying currents in local exhaust ventilation systems and deals with the aerodynamics of loose-matter handling in porous ducts and the identification of regularities in air circulation patterns in bypass ducts. Topics covered include the determination of vortex field boundaries, development dynamics of vortex flow patterns, and interaction between the exhaust plume and inflow jets.
Divided into two sections, this text:
- Examines the computations of gas-borne dust flows in local exhaust ventilation systems
- Provides practical recommendations for the energy-efficient containment of dust emissions
- Discusses basic approaches to operational energy savings for local exhaust ventilation systems
- Uses color photos throughout to illustrate dust behavior, flow lines, and patterns
Local Exhaust Ventilation: Aerodynamic Processes and Calculations of Dust Emissions establishes local exhaust ventilation as the most reliable way to control the emission of harmful substances. This text incorporates solutions that reduce material carryover rates and decrease the volume of air evacuated by suction, adequately reducing the dust level in an industrial work area, and can help solve a number of problems related to industrial ventilation.
AERODYNAMICS OF DUST AIRFLOWS IN THE SPECTRA OF AIR EXHAUST DUCTS
Determination of the Velocity Field by Conformal Mapping Methods
Unseparated Flows
Separated Flows
Calculation of the Flow at the Entrance of the Slot-Type Suction Bell
Simulation of Flow Separation at the Inlet of a Projecting Flat Suction Channel
Mathematic Simulation of Influence of a Screen on the Aerodynamic Drag Value of a Suction Slot
Simulation of Air Jet Flow at the Inlet into a Hooded Flat Channel Equipped with an Impermeable Screen
Laws of Separated Flows at the Inlet into a Projecting Channel with Screens
Calculation of Flat Potential Flows by the Boundary Integral Equation Method
Flow Superposition Method
Boundary Integral Equations Method
Calculation of Vortex Flows
Frictional Flows
Flow Simulation Using a Vortex Layer
Vortex Flow around a Slot-Type Suction Above the Right Dihedral Angle
Nonstationary Flows around Slot-Type and Round Suction Units
Supply Air Jet Suction United Exhausts
Closed Region Flows: Model Problems
Modeling Flows in Thin Screen Areas (Slot-Type)
Modeling Separated Flows Using Stationary Discrete Vortices
Behavior of Dust Particles in the Suction Range
Modeling the Behavior of Single Dust Particles in the Range of Semiclosed and Closed Exhaust Ducts
Analysis of Dust Particle Dynamics Induced at Open Local Exhausts by Rotating Cylinders
Modeling Dust Particle Dynamics in Suction Units with Rotating Cylinders
Modeling the Behavior of Dust Particles in Pulsating Flows
Modeling the Behavior of Polyfractional Aerosol in a Suction Unit
Some Gas-Dust Flow Calculation Data Obtained Using RANS and LES Methods
RECIRCULATION OF EJECTED AIR IN CHUTES
Specific Features of Air Ejection in a Perforated Duct with a Bypass Chamber
One-Dimensional Dynamics Equations for Ejected and Recycled Air
Linearization of Relative Motion Equations for Air Ejected in a Perforated Pipe
Numerical Studies
Specific Behavior of Air Recirculation in a Transfer Chute with a Combined Bypass Chamber
Conclusions
Air Ejection in a Porous Pipe with Linear Cross-Flow Pattern
Porous Pipe without Bypass
Porous Pipe with a Bypass Chamber
Conclusions
Specific Features of Air Ejection in Elevator Handling of Grain
Variation of Ejection Heads Created by Falling Particles in Chutes with Varying Frontal Drag Coefficients
Ejecting Properties of a Bucket Elevator
Cross Flow of Air through Sealed Elevator Enclosures
Conclusions
Measures for Reducing Aspiration Volumes in Elevator Handling of Grain
Aerodynamic Performance of Elevator Buckets
Features of the Proposed Design for Aspiration Layout of Grain Elevators
Aspiration Volumes
Reducing Required Aspiration Volumes in Bypassed Elevator Handling Systems
Conclusions
References
Biography
Ivan Nikolayevich Logachev holds a doctorate in engineering and is a professor and academician at the Russian Academy ofNatural Sciences, Moscow, Russia. He graduated from the Kharkiv Engineering-Building Institute in 1962, with a specialization in heat and ventilation. For more than 30 years he worked in the All-Union Scientific Research Institute of Safety and Environment in the Mining and Metallurgical Industry (Krivoy Rog), where he was promoted from research assistant to the head of the laboratory of industrial ventilation. Dr. I. Logachev is the author of more than 300 scientific papers, more than 50 inventions, and several monographs.
Konstantin Ivanovich Logachev
holds a doctorate in engineering and is a professor at Belgorod State Technological University, Belgorod, Russia, where he has been working since 1995. He graduated from the Dnepropetrovsk State University in 1992, with a specialization in "hydroaerodynamics." Dr. K. Logachev has authored more than 150 scientific publications.Olga Aleksandrovna Averkova
received a Candidate of Technical Sciences degree from the Belgorod State Technological University, Belgorod, Russia in 2004, and is currently an associate professor at the university. She has authored more than 100 scientific publications."Properly designed and effective air pollution control and industrial ventilation systems are essential for maintaining required indoor and outdoor air quality and safe and healthy working conditions for personnel employed at numerous industries, dealing with generating, processing, or containing particulate matter. This fundamental study of complicated aerodynamics and particulate matter dynamics in industrial ventilation and air pollution control systems provides important contribution to the field of industrial ventilation and air pollution control. The results of extensive theoretical & practical studies, provided in this book, are beneficial to engineers, designing local exhaust ventilation and air pollution control systems, industrial hygienists, and students in the fields of mechanical engineering, environmental engineering, fire protection engineering, and industrial hygiene."
—Vladimir Ivensky, CIH, CSP, VP, Health, Safety & Environment, Environment & Infrastructure, Amec Foster Wheeler"… an excellent summary of the theory behind the flow fields of gas-borne dust flows for local exhaust ventilation systems. … a valuable contribution to a better understanding of the theoretical fundamentals of the development of the gas-solid disperse systems . Using this new knowledge, the designer has the opportunity to apply the practical application of these fundamental equations to a wide range of industries and to design energy efficient local exhaust ventilation systems."
—Prof Howard Goodfellow, Director Tenova Goodfellow, Inc, Toronto, Canada, Professor Emeritus University of Toronto
