Abstract: A system for cleaning the fouling and clogging of particulate matter associated with a fluidized gas bed. The system is particularly suited for use with Selective Catalytic Reduction reactors but its use is not limited thereto. The system includes a gas compressor to force cleaning gas through gas injection lines adjacent to retaining structures to be cleaned. The compressor produces sufficient pressure to cause the cleaning gas to dislodge the particulate from the retaining structures. A vacuum system withdraws the dislodged particulate and mixed gas from the reaction chamber.

Abstract: A modified expansion joint to provide a transition from one conduit to an adjacent conduit. The expansion joint includes a flexible coupling member and an angled transition leg having insulation on both sides thereof. The flexible coupling member takes up any variations in dimensional differences between the adjacent conduits. The transition leg provides a gradual thermal transition from a hot upstream conduit to a downstream conduit at a lower exterior surface temperature.

Abstract: A valving system for diverting fluids from one location to another. The valving system includes a valve housing and two or more dampers. The dampers are rotatably coupled to one or more shafts and are designed to move in a synchronized manner such that when opens and closes prior to the other damper or dampers doing so. The valving system of the present invention is particularly useful in the field of regenerative incineration where it is necessary to rapidly change the movement of a hazardous fluid from one regeneration bed to another. However, it may be used in any environment in which switching of the fluid flow over relatively short time periods is desired. The valving system diverts the fluid in a switchable manner that minimizes energy usage without diverting raw fluid directly to an output. A sealing system is located at the ends of the dampers.

Abstract: A louver damper device for the control of fluid flow within a conduit. The louver damper device includes one or more louvers, wherein each louver is a single-walled pivotable unit. The ends of louvers that are adjacent to one another are designed with coupling legs so that when the device is actuated into a blocking position within the conduit, the louver ends become sealingly engaged so as to form relatively small sealing chambers therebetween. Purge air may then be delivered to the sealing chambers to ensure a complete blocking of fluid movement within the conduit. The louvers adjacent to the conduit walls include end modifications similar to those provided to the intermediate louvers. Alternatively, flexible sealing hubs may be affixed to the conduit walls for engagement with modified ends of those perimeter louvers designed to sweep away any particulate residing on the flexible hubs without affect on the seal between those louvers and the interior conduit walls.

Abstract: An expansion joint which employs a flexible material to connect and inlet duct equipment to an outlet duct or equipment includes an inlet frame which is connected to the inlet duct and an outlet frame which is connected to the outlet duct. In a hot frame to cold frame type of expansion joint, the inlet frame, along with an inlet liner is shaped to form a channel which has at least one side which is acutely angled with respect to the primary direction of gas flow through the expansion joint. Expansion joints for use in a cold frame to hot frame and in a hot frame to hot frame application are also described. The expansion joint additionally employs clamps, which clamp the flexible material to the inlet and outlet frames in a manner which reduces the amount of heat to which the flexible material is exposed.

Abstract: Valves of the diverter and isolating types have their ports which are to be opened and closed surrounded by seats each of which is inclined inwardly towards the surrounded port. The hinged blades are surrounded by tips in support of seals of which there are two for each port to be closed. The seals are metallic and resiliently flexible and the seals of each pair are disposed to engage spaced apart, transverse zones of a seat when a blade is operatively positioned to close the surrounded port. As a diverter valve has two ports to be closed by opposite sides of its blade, there are two like but oppositely disposed pairs of seals, one pair for each port. With both types of valves, the seals of a blade are in substantially linear engagement with a seat when the blade is positioned to close the associated port and are in scraping engagement with the seat as the blade moves into and out of that position.

Abstract: Louver dampers for use in the exhaust system of gas turbines have flat blades each of which is provided with a lengthwise reinforcement spaced from the major portion of its face which is upstream when the damper is closed and has sides welded thereto adjacent the side margins thereof. Each side of each reinforcement has ports which ensure contact of hot gases with the portions of the blade underlying the reinforcement so that the entire surface of each blade and its reinforcement are uniformly heated preventing blade distortion that would prevent the operation of the damper and destroy the effectiveness of seals in case the damper is equipped therewith.

Abstract: A gas flow diverter receives large volumes of hot gases from a gas turbine into a chamber in which is a pivotally mounted blade adapted to close either the outlet port to a heat recovery steam generator or the outlet port to the stack. Each port is surrounded by an open channel, the two side walls of each of which are provided with an exposed seal arranged one beyond the other. One or both surfaces of the blade is insulated, the insulated surface(s) being covered with steel cladding and the uncovered surface being a stainless steel membrane adapted to resist corrosion from the hot gases. The steel cladding is connected through insulation to the underlying structure in a manner permitting but confining the expansion of the cladding.

Abstract: A guillotine damper has the framework surrounding a flow path provided with side and bottom guide sections. The blade has U-shaped channel sections extending along the top, bottom and sides thereof with its bottom and side sections dimensioned for sliding engagement with corresponding guide sections. The guide and channel sections are connected to the framework and blade, respectively, in a manner preventing their distortions by thermal expansion forces.

Abstract: Fabric expansion joints suitable for use in the exhaust systems of gas turbines are of three types definable with reference to whether a frame is to be connected to a duct section which is externally insulated or one which is internally insulated. In joints where only the outlet frame or where both the inlet and outlet frames are to be connected to internally insulated sections, the flanges of the liners are connected to their frames in a manner preventing movement of the liners relative to the axis of the flow path through the joint but permitting thermal flange growth relative to the frames. Where a frame is to be connected to an externally insulated duct, the frame includes structure spaced from the flange of the liner which defines therewith an inwardly opening, thermal distribution channel. In each type, the free ends of the liners overlap in a spaced apart relationship and are interconnected in a manner permitting relative lengthwise movement between them.

Abstract: A vertically reciprocable gate assembly which includes a frame surrounding a port and a gate having a gate member connected by links to an actuating member which is slidably connected to the frame with the gate member between it and the frame. Unless the gate is closed, the gate member is held against the actuating member and out of sealing contact with the frame. When the gate is lowered, it engages a stop which establishes a predetermined position of the gate member relative to the port, further downward movement of the actuating member causes the links to thrust the gate member into its operative position.

Abstract: A leaf spring seal to effect sealing contact between such members as a damper blade and a frame consists of a set of leaf springs having their inner portions held together by clamping components of which one is a bar and the other the inner portion of a ledge. Either the ledge or the bar may be a part of whichever member is to be provided with the seal with the other member then provided with a seat. The outer leaf spring portions of the leaf springs are all inclined in the same direction and to the same extent relative to their inner portions and decrease in width with the outer leaf spring portion of maximum width and in sealing contact with the seat when the seal and seat are in engagement with the leaf spring set then tensioned. The outer portion of the ledge is inclined in the same direction as the outer leaf spring portions and engages one of them to maintain the leaf spring set tensioned at least until the seal and the seat are engaged.

Abstract: A gas flow diverter receives large volumes of hot gases from a gas turbine and has a blade adapted to close either the outlet port to a heat recovery steam generator or the outlet port to the stack. Each port is surrounded by an open channel the two side walls of which are each provided with a seal with both exposed, one beyond the other. The surfaces of the blade are stainless steel cladding and are connected through insulation to a reinforcement in a manner permitting but confining the expansion of the cladding. The frame has a border providing first and second ledges on each side which are spaced and positioned so that each may engage a different one of the two seals bordering an outlet port when closed thus establishing the channel as a closed passageway surrounding the closed port which may be sealed against leakage by discharging sealing air into it.

Abstract: A flap gate installation for systems where liquids are pumped into a holding tank has a fabricated frame surrounding the port of the conduit which opens into the tank. A flap gate is hingedly connected to the top of the frame and has concavo-convex walls welded to a gate frame with the convex surfaces of the walls the outer surface of the gate. The flap gate is held seated and sealed against the installed frame not only by its weight but by the head on stored liquids and is opened against that head by pumping pressures on liquid to be delivered into the holding tank. the cancavo-convex walls of the gate enable the weight of the gate to be substantially reduced with a corresponding reduction in pumping costs.

Abstract: The proximate ends of spaced apart sections of duct systems for fluid media are interconnected by expansion joints having a sleeve of flexible material surrounding and isolating the flow path in the area between the sections. The flexible material consists of at least one reinforcing substrate to which surface layers of a media resisting material having a degree of elasticity are fused and bonded. Each substrate in one embodiment consists of two series of strands oriented to present a criss-cross pattern with the strands of both series diagonally disposed with with respect to the flow path when the material is formed into a sleeve. In another embodiment, there is an additional series of strands which are longitudinal.

Abstract: A damper for ducts of large cross sectional areas has an upstream seat surrounding the flow path and a blade which consists of upstream and downstream skins of a high quality nickel allow steel and an internal reinforcement. The thickness of the skins is such that, given the size and shape of the seat, they are relatively flexible. The skins are welded to opposite sides of the reinforcement which is in the form of a grid or lattice of substantially the size and shape of the seat and both renders the skins rigid and establishes the wanted blade thickness. Members marginally of the grid and welded thereto are exposed to be operatively engaged by the mechanism by which the blade is reciprocated between positions permitting or blocking flow through the damper.

Abstract: A double louver damper for use in a duct system conveying hot gases and particles in order to permit safe entry to be made therein when servicing is required has a frame to be incorporated in the system. The frame has two parallel seals surrounding the flow path, one spaced downstream relative thereto and to the other. The frame pivotally supports two sets of the same number of blades, one set for each seal and with the axes of the corresponding blades of the two series in the same plane. Each blade is in the form of an elongated, centrally pivoted diamond and is provided with coplanar lengthwise and end sealing portions of the same radial extent. When the damper is closed, the long axes of the blades are substantially in the same plane with the proximate lengthwise sealing portions overlapping and the remaining lengthwise and end sealing portions engaging the appropriate one of the seals.

Abstract: A guillotine damper for use in exhaust or like duct systems which must be entered by men for servicing has its frame provided with guides extending about the flow path from one end of the opening by which the blade enters an air tight bonnet to the other end thereof and enclosed by resiliently flexible metal seals. The blade has marginal channels coextensive with the guides with the channels closely fitting the guides and compressing the sides of the seals with zero leakage attained by sealing air discharged along the channels during movement of the blade and while the damper is closed.

Abstract: A guillotine damper for a duct is provided with a thrust frame upstream of the path of a blade that is movable into and out of an operative position in sealing engagement with a seat downstream of the blade path when the flow path is not obstructed by the blade and in sealing engagement with and seating the blade against the seat when the blade is positioned to block the duct. Devices are provided with each utilizing resilient components to thrust the frame into its sealing positions and a hydraulic component to retract the frame when the blade is to be moved into or out of its duct blocking position. Each device exerts the force of either component to the frame through a series of mechanical elements spaced a substantial distance apart along the sides of the frames and connected thereto.

Abstract: An expansion joint for ducts for high temperature gases has upstream and downstream members to be secured to spaced apart ends of corresponding duct sections. Each member has an outer flange, the outer flanges disposed towards each other and having a fabric cover secured thereto. The upstream member has an inner flange disposed towards the downstream member. A floating seal has right angular portions of which one overlaps the outer surface of the inner flange and the other overlaps the downstream member. Clips back each portion of the floating seal to hold them to provide a maximum clearance between the boundaries thereof. Resilient seals carried by the floating seal slidably engage the overlapped boundaries of the clearance.