Abstract: Unit operations continue to be evolved for the production of fuel from waste. One such device, the active pulsed‐flow air classifier, called for the design of a valve to pulse the airflow. This valve had to be capable of ...

Abstract: The concept of mechanical separation of municipal solid waste (MSW) was initially viewed with great optimism, prompting the use of unit operations taken from other industries without adequate modification. Many plants were ...

Abstract: A theoretical model was developed based on a fluid mechanical force balance to describe the behavior of particles in pulsing airflow. Several attributes distinguished this flow regime from those that have been widely ...

Abstract: Rotary screens are an important unit operation in materials processing. Much of their design has been empirical. Herein, a mathematical model is developed with three major components: particle rise on the screen, particle ...

Abstract: The development and testing of the concept of pulsed‐flow air classification for waste‐to‐energy production are discussed. Air classifiers, a potentially valuable unit operation in waste‐to‐energy production facilities, ...

Abstract: The cyclone as a unit operation for processing airborne material in a waste‐to‐energy production facility is studied. The theories of cyclone design and operation are reviewed. Applications and modifications of the theories ...

Abstract: Field experience with air classifiers in waste‐to‐energy has indicated the need for redesign. Previous work indicates a heed to achieve separation based more on density and less on aerodynamic characteristics than is ...

Abstract: A mathematical model based on a fluid‐mechanical force balance has been used to study the behavior of spheres in the positionvarying airflow in idealized passive pulsing air classifiers. The movement of spheres whose ...