The Babcock & Wilcox Company

Babcock & Wilcox Power Generation Group, Inc.

Robert E Snyder

Paul J Williams

Donald P Tonn

Edward J Piaskowski

Albert L Moretti

Eric J Schwartz

Ronald J Triscori

A fabric filter for separating particulate matter from a gas stream includes a filter compartment and an inlet opening for delivering at least a portion of the gas stream to the filter compartment. The fabric filter further includes one or more filter elements within the filter compartment and a louver assembly for providing access for the at least a portion of the gas stream to said filter compartment. The louver assembly has a first louver associated with the inlet opening and movable between a first-louver-first position and a first-louver-second position. The louver assembly has a second louver associated with the inlet opening and movable between a second-louver-first position and a second-louver-second position. The first louver and the second louver are movable independent of each other to facilitate or restrict fluid communication through said opening.

Fabric filter louver assembly

A hybrid, wet electrostatic precipitator has multiple precipitation zones for removing particulate and contaminants from a flue gas stream. A first precipitation zone has at least one discharge electrode and at least one collection plate made of a metal or a fiber glass reinforced plastic. A second precipitation zone has at least one discharge electrode and at least one collecting electrode which is a porous membrane sheet. The precipitation zones are in series with one another.

Hybrid wet electrostatic precipitator

A particulate separator includes a plurality of perforated screens which remove ash particulate from flue gas. A rapper assembly dislodges ash deposits on the perforated screens by exerting a vibrating force thereon. Shafts, which are operatively connected to a rapping device, are received in the openings of perforated screens and welded thereto. The rapper exerts a force on the shaft, which, in turn, vibrates the perforated screen. The vibration of the perforated screens causes the ash deposits to fall off into the hopper.

Assembly for ash separation from flue gas

A thermal mixer reduces the temperature of flue gas supplied to a fabric filter. Two spray dry absorbers are operable to cool flue gas. A housing of the mixer has first and second inlet passages for gas from the absorbers, an outlet passage for gas to the fabric filter, and a mixing passage. A set of damper vanes extends in the mixing passage and has a mixing position for mixing the flue gases from the inlet passages to supply mixed gas to the outlet passage at relatively high pressure drop but lower temperature if one of the absorbers in not operating. They have a non-mixing position for passage of gases without mixing and at low pressure drop when both absorbers are operating. The invention can also be used to improve mixing of combined gas streams initially having different chemical compositions or amounts of particle loading.

Intermittent mixer with low pressure drop

An anvil arrangement for receiving rapper impacts and transmitting them to a discharge electrode of a precipitator has an electrode tube made of deformable material, having an open end and forming part of the discharge electrode. An anvil having a head and a shank is connected to the head and the shank has a size for insertion into the open end of the tube. The head is larger than the tube for engagement against the open end of the tube. The shank has a recess therein and at least one crimp in the tube near the open end thereof and in the vicinity of the recess of the shank for retaining the anvil to the tube. An alternate embodiment receives the electrode tube therein and engages the tube with an angled groove.

Electrostatic precipitator discharge rapper anvil

A method and apparatus for venting the seal air pressure within an isolated system so as to obtain a relatively small, in the range of 4 to 8 inches water gauge more or less, pressure differential across the isolation dampers. This small pressure differential is desired so as to reduce the load against which the dampers must operate thereby permitting a more economical design of such dampers.

Growing community of inventors

Uniontown, OH, United States of America

Robert E Snyder