Abstract: A system for collecting ultra fine fly ash from a dry fly ash removal system includes providing a bagfilter transport conduit for each bagfilter of the system. A vacuum shutoff valve is positioned in each bagfilter transport conduit The bagfilter transport conduit is selectively connected to an educator that is, in turn, selectively connected to a blower. The blower creates a vacuum flow in the transport conduit that draws the ultra fine fly ash from the bagfilter and deposits the ultra fine fly ash in a collection bin. This system allows a dry fly ash removal system to segregate fly ash by size and separately collect the ultra fine fly ash from the larger fly ash particles. The ultra fine fly ash has been found to be commercially valuable as a concrete admixture filler in various applications.

Abstract: A system for collecting ultra fine fly ash from a dry fly ash removal system includes providing a bagfilter transport conduit for each bagfilter of the system. A vacuum shutoff valve is positioned in each bagfilter transport conduit The bagfilter transport conduit is selectively connected to an educator that is, in turn, selectively connected to a blower. The blower creates a vacuum flow in the transport conduit that draws the ultra fine fly ash from the bagfilter and deposits the ultra fine fly ash in a collection bin. This system allows a dry fly ash removal system to segregate fly ash by size and separately collect the ultra fine fly ash from the larger fly ash particles. The ultra fine fly ash has been found to be commercially valuable as a concrete admixture filler in various applications.

Abstract: A low density ash particle separation and collection method and device for separating low density particles, primarily frothy-solid particles with internal and external porosity and thick walled hollow particles, from the overall mixture of higher density particles including raw fly ash as produced by coal fired power plants. Specifically, the invention relates to a device and method for separating and collecting the low density fly ash fraction composed of thick walled hollow fly ash particles and frothy generally solid particles with both internal and external porosity and a relatively small amount of cenospheres from the overall mixture of ash particles composing raw ash as produced by coal fired power plants by de-energizing one or more fields of large electrostatic precipitators during electrostatic precipitation of the ash resulting in the dropping out of the lower density particles in the hoppers located below the de-energized field(s) of the electrostatic precipitator.

Abstract: A method of separating a low density fly ash fraction from an overall group of fly ash entrained in a gas stream including the steps of passing the gas through a duct having a first area; passing the gas stream from the duct through an expansion nozzle; passing the gas stream through the expansion nozzle and into a hollow body having a second area, whereby the second area is larger than the first area; decelerating the gas stream as it enters the expansion nozzle to separate out low density ash particles; and collecting the low density ash particles from a hopper positioned adjacent the expansion nozzle.

Abstract: A system for collecting ultra fine fly ash from a dry fly ash removal system includes providing a bagfilter transport conduit for each bagfilter of the system. A vacuum shutoff valve is positioned in each bagfilter transport conduit The bagfilter transport conduit is selectively connected to an educator that is, in turn, selectively connected to a blower. The blower creates a vacuum flow in the transport conduit that draws the ultra fine fly ash from the bagfilter and deposits the ultra fine fly ash in a collection bin. This system allows a dry fly ash removal system to segregate fly ash by size and separately collect the ultra fine fly ash from the larger fly ash particles. The ultra fine fly ash has been found to be commercially valuable as a concrete admixture filler in various applications.

Abstract: A system for collecting ultra fine fly ash from a dry fly ash removal system includes providing a bagfilter transport conduit for each bagfilter of the system. A vacuum shutoff valve is positioned in each bagfilter transport conduit. The bagfilter transport conduit is selectively connected to an educator that is, in turn, selectively connected to a blower. The blower creates a vacuum flow in the transport conduit that draws the ultra fine fly ash from the bagfilter and deposits the ultra fine fly ash in a collection bin. This system allows a dry fly ash removal system to segregate fly ash by size and separately collect the ultra fine fly ash from the larger fly ash particles. The ultra fine fly ash has been found to be commercially valuable as a concrete admixture filler in various applications.