Abstract: An improved process and apparatus for combustion flue gas conditioning in which ammonia is produced in situ from the hydrolysis of urea and injected into a stream of combustion flue gases, wherein key components of the process and apparatus are made to function independently of other components to prevent the shut-down of the entire apparatus in the case of a single component break-down.

Abstract: An electrostatic precipitation system (100) utilizes laminar flow of a particulate-laden gas in order to enhance the removal of sub-micron sized particulates. The system incorporates a vertically oriented housing (105) through which the gas flows downwardly therethrough to a lower outlet port (110). The gas, which may be a flue gas enters the laminar flow precipitator (102) through an inlet port (108) for passage through a charging section (104). The charging section (104) imparts a charge to the particulates carried by the flue gas. The flue gas and charged particles then flow to a collecting section (106) which is downstream and below the charging section (104). The collecting section (106) is formed by a plurality of substantially parallel tubular members, each tubular member defining a collecting passage therein.

Abstract: A flow sensing apparatus having increased sensitivity is disclosed for sensing the flow of gas, particularly through a confined passage such as the ducts in heating, ventilating and air conditioning systems. The flow sensing apparatus comprises a tube divided by a wall into an upstream chamber and a downstream chamber. The upstream chamber can have a constant orifice but preferably the walls of the tube in the upstream end are tapered to form a tapered chamber section. A total pressure sensing probe is located in the center of the tube and has its opening in the upstream chamber of the tube. The total sensing probe has its opening parallel to the flow of gas and facing upstream, the opening of the total pressure sensing probe preferably being in the wall dividing the tube into the upstream and downstream chambers. A static pressure sensing probe is located in the downstream chamber. The static pressure probe may be located in the walls of the tube and have its opening perpendicular to the flow of gas.

Abstract: An improved variable volume control assembly for conditioned air systems having an improved air flow amplifying sensing means that amplifies the difference between the total pressure and the static pressure and is sensitive at low pressures, an improved air flow collector-straightener, a critical ratio of the area of the inlet to the area of the expansion chamber, and a vortex filter strategically located within the assembly for maximum reduction of turbulence and noise.

Abstract: An improved variable volume control assembly for conditioned air systems having an improved air flow amplifying measuring means that amplifies the difference between the total pressure and the static pressure and is sensitive at low pressures, an improved air flow collector-straightener, a critical ratio of the area of the inlet to the area of the expansion chamber, and a vortex filter strategically located within the assembly for maximum reduction of turbulence and noise.

Abstract: Herein disclosed is a floating skimming apparatus for removal of contaminated particles from the surface of a liquid contained in a tank. The floating skimming apparatus comprises a deflecting chamber extending substantially the width of the tank, movable along the length of the tank, and has at least one vertex for collecting deflected contaminated particles upon movement of the deflecting chamber. Flotation collars are connected to the deflecting chamber for continuously maintaining a portion of the deflecting chamber above the surface of the liquid. An evacuation device is connected to the deflecting chamber at the vertex for collecting the contaminated particles and removing the contaminated particles from the tank.

Abstract: A fixed center column supports axially a torque cage mounted to a first bearing on the column, and a second bearing is disposed between the torque cage and a supporting walkway or superstructure. A powered drive unit is mounted to the walkway and has a drive shaft that is connected to the torque cage for rotation thereof about the axis of the center column.

Abstract: Herein disclosed is an electrostatic precipitator for removal of corrosive particles from a corrosive laden gas passing therethrough. The electrostatic precipitator comprises a shell having a corrosive resistant lining secured thereto. A corrosive resistant support plate is secured to the shell of the precipitator and first and second sets of juxtaposed corrosive resistant collector electrode tubes are suspended from the support plate. A corrosive resistant top support grid is spaced above the support plate and insulated from the shell and a corrosive resistant bottom guide grid is spaced below the first and second sets of collector electrode tubes. A plurality of corrosive resistant discharge wires are secured between the top support grid and the bottom guide grid and pass substantially through the center of the tubes in the first set.

Abstract: Electrostatic precipitator apparatus for cleaning a particle-laden gas flowing therethrough including a shell with a gas inlet duct and outlet duct, spaced collector electrodes suspended within the shell defining gas passages therebetween, discharge electrodes suspended within the gas passages for ionizing particles in the gas for collection by the collector electrodes, and hoppers suspended below the collector electrodes for collecting the particles dislodged therefrom. The inlet duct includes a gas distribution baffle having a rigid pervious upper portion and flexible substantially impervious lower portion, preferably a chain curtain, to permit particle accumulations in the inlet duct to pass into the shell for collection in the hoppers.

Abstract: An electrostatic precipitator for cleaning a particle laden gas passing therethrough comprising a shell having a gas inlet and outlet port and defining a gas chamber therein, a plurality of laterally spaced collector electrodes suspended within the gas chamber defining gas passages between adjacent collector electrodes, a discharge electrode assembly suspended from an insulator within the gas chamber, a portion thereof suspended within the gas passages between the adjacent collector electrodes, the discharge electrode assembly being insulated by the insulator from the shell and the collector electrodes, and a plurality of electrically insulating stabilizers connected between selected ones of the collector electrodes and the discharge electrode assembly for maintaining the portion of the discharge electrode assembly suspended within the gas passages substantially centered between the adjacent collector electrodes.