Abstract: A system and method for producing product gas using residual waste liquor is described with a gasifier reactor having a fluidized bed located therein. The gasifier reactor is heated to a predetermined temperature range with either an external heater or a second fluidized bed located at a position below the first fluidized bed. A heat exchanger may be positioned in the first fluidized bed and/or the second fluidized bed for indirectly heating the respective fluidized beds. Condensing heat exchanger means recovers heat from the product gas and condenses an acid gas therefrom for recycling the chemicals. A reagent is sprayed in the condensing heat exchanger means to clean the product gas. Pressurization allows the cleaned product gas to be directly fired in a turbine.

Abstract: A system for providing heated fluidized bed gasification of a residual waste liquor provides a bed of granular material and a source of liquor provided to the material bed. An injector is situated in the material bed and communicates with an air source, a fuel source and a steam source. Fuel and air are combusted in the injector and mixed with the steam which forms a combustion product and steam mixture which is in turn injected into the material bed. The combustion and mixing is separated from the bed material by being confined within the injector. The injector is a bubble cap having at least one hole or an injector made of a porous ceramic material.

Abstract: A method for treating a chelate bearing waste solution employs a two-step process which includes elevating the pH of the solution to a pH greater than 10 and precipitating the metal as the hydroxide out of solution, followed by treating the resultant solution with an oxidant to destroy any remaining free chelate.

Abstract: An apparatus and method are disclosed for determining the integrity of coated nuclear fuel particles by evaluating acoustic parameter measurements of the particles during controlled loading.

Abstract: A one-piece curved floating primary divider plate (40) is described which is suitable for retrofit in an existing steam generator. The one-piece curved floating primary divider plate eliminates most loose parts and reduces leakage of the primary flow resulting in an improvement in the thermal performance of a steam generator. A method of retrofitting a primary divider plate in an existing steam generators is also described to improve the thermal performance of the steam generator.

Abstract: A method and apparatus for groove weld joining pipe sections along a rotating preform having a circumferential groove thereon along which the preformed adjoining pipe sections are located to form a weld in the joining area and a underbead in the groove of the preform to thus weld together the pipe sections.

Abstract: An outage protection system for a SCR (selective catalytic reduction) reactor utilizes a pair of dampers to isolate the catalyst bed and the ammonia injection grid of the SCR reactor and to provide a blower driven closed loop flow of externally heated air from the injector grid across the catalyst bed to an external heater and back to the injection grid.

Abstract: A compressed natural gas refueling station tank comprises an elongated tubular body having a diameter of about 8 to 10 inches and a length of 50 feet or more. The tank is bent into a serpentine shape to produce a compact configuration which can be stacked with other like tanks and connected to a compressor through a manifold.

Abstract: A coal burner with impeller for a furnace has a housing containing a plurality of sets of blades which direct the fuel from the coal nozzle into a plurality of non-intersecting flows directed obliquely towards the longitudinal axis of the housing. The non-intersecting flows create a fuel-rich devolatilization zone and an air-rich char burnout zone within the furnace and limit the flame length of the burner.

Abstract: A system is disclosed for minimizing equipment and flue fouling for any boiler, turbine, or combustion process in which heat recovery is advantageous and pollutant removal is necessary. The process uses an SCR located upstream of a condensing heat exchanger and maintains the temperatures in the flue gas duct such that ammonia slip and ammonium salt products are collected only on the heat exchanger surfaces which are periodically washed with water and this wash water being collected.

Abstract: A method and apparatus for controlling NO.sub.x produced by a natural gas fired combustion source includes establishing a control curve for the combustion source for indicating NO.sub.x levels based on steam injection rates and fuel flow rates provided to the burners. The atomizing steam injection flow rate provided to the burner is measured as well as the fuel flow rate. A NO.sub.x level is determined for the combustion source based on the atomizing steam injection flow rate, the firing rate, and the fuel flow rate. NO.sub.x levels are lowered by adding atomized steam to the burners according to the pre-programmed control curve.

Abstract: A two-stage flue gas treatment condensing heat exchanger system allows for flue gas to be passed into a two-stage housing at an inlet of the housing. The flue gas is channeled downwardly through a first stage of the housing having a first condensing heat exchanger which cools the flue gas. The flue gas is then upwardly channeled in the housing through a second stage having a second condensing heat exchanger which is located near an outlet. A collection section is located between the first stage and the second stage of the housing for collecting liquids, condensate, particulate and reaction product. Steam is injected into the housing at a plurality of locations for enhancing particulate removal.

Abstract: A method and apparatus is described for removing acid gases, air toxics and/or other contaminants from a flue gas stream formed during the combustion of fossil fuel, and/or waste materials. The flue gas stream is conditioned immediately downstream of the combustion source with a finely atomized liquid which is preferably water. The water spray decreases the volume of the flue gas and cools the flue gas to condense air toxics or heavy metals on the baghouse fabric filters. Advantageously, this may utilize the alkalinity inherent in the fly ash component of the particulate to assist in the removal of acid gases and/or other contaminants via adsorption. Also, the conditioned gas reduces the flue gas volumetric flow rate and hence the size of the particulate collection device, and the cost of the fabric filter media.

Abstract: A method for passivating the surfaces of a nuclear steam generator and a solution therefor includes EDTA and hydrogen peroxide in a temperature range of 37.degree. C. to 49.degree. C. The solution is adjusted to have a pH of between about 9.2 and 9.5 and used on the surfaces for two hours or more for passivating the surfaces.

Abstract: A method for controlling emissions of a fossil fuel fired boiler including a high temperature fabric filter house with an SCR catalyst situated therein for receiving flue gases along with an injected ammoniacal compound and sorbent. The sorbent reacts with the SO.sub.x while the ammoniacal compound reduces the NO.sub.x in the presence of the SCR catalyst inside the high temperature fabric filter house. Both the SO.sub.x and the particulates are removed upstream of the SCR catalyst to diminish the problems of SO.sub.2 or SO.sub.3 poisoning of the catalyst and erosion and fouling of the catalyst with the fly ash. Since the sulfur oxides and particulates are removed prior to the heat recovery system, the fouling and corrosion potential are substantially decreased thus allowing the heat recovery system to be operated at a lower outlet flue gas temperature which yields an incremental improvement in energy recovery.

Abstract: An apparatus for determining the relative flows of a two phase flow using differential pressure to obtain mass flow having a bend portion for concentrating the dense phase toward an outside of the bend; a perforated plate downstream of the bend for passing the portion of the light phase; a nozzle for channelling the portion of the flow having high density phase toward the center of a venturi throat which is positioned downstream of the perforated plate; and four pressure sensors strategically located for measuring pressure differences at various points in the flow meter.

Abstract: An automated sludge lance and method is described for cleaning sludge from tubes in a steam generator. The lance guide and waterlance are moved inside the steam generator to direct a fluid between the tubes to effectively clean sludge from the tubes. The remote control system is mounted outside the steam generator where it is readily serviceable. The automated sludge lance and method can be used in the no-tube-lane, in the annular chamber, or in combination.

Abstract: An automated sludge lance and method is described for cleaning sludge from tubes in a steam generator. The lance guide and waterlance are moved inside the steam generator to direct a fluid between the tubes to effectively clean sludge from the tubes. The remote control system is mounted outside the steam generator where it is readily serviceable. The automated sludge lance and method can be used in the no-tube-lane, in the annular chamber, or in combination.

Abstract: An improved composite waterlance and cavity connection is described where fiber reinforcements longitudinally extend through the body (24) of waterlance (10) and are inserted into a wedge shaped cavity at the top (18a) and bottom (18b) of a front manifold (18). An adhesive in the cavity and on the end of the rope (36) fixes the rope to the front manifold (18) and to the body (24) of the waterlance (10) to provide improved strength in the connection.

Abstract: A cylindrical heat exchanger assembly has a plurality of spaced cylindrical heat exchangers having bulge formed circumferential passageways spiraling along the cylindrical surface of each to form a passageway for heat transfer fluid flow therethrough and for allowing a second fluid to sealably flow in the spaces therebetween to establish heat transfer between the two fluids thereby.