Abstract: An air preheater has heat transfer elements with a first series of corrugated elements having longitudinally oriented, mutually parallel corrugations formed generally continuously across the lateral direction. Positioned on either side of each of the corrugated elements of the first series are a series of notched plates each having mutually parallel spaced apart notches. Each notch is formed by parallel double ridges projecting transversely from opposite sides and the element has flat sections between the notches. The notches are oriented obliquely in mutually opposite directions relative to the corrugations of the adjacent elements whereby the notched elements are in contact with the corrugated elements solely at the points of intersection of the notches and corrugations. This produces an increased number of boundary layer breaks and improves heat transfer as well as providing straight line passages through the elements.

Abstract: A hot spot detection system for a rotary regenerative preheater has a linear rail system positionable between the central portion and the casing of the air preheater. The rail assembly has a pair of rails with a carriage movably mounted to each rail. The drive assembly has a motor and sprocket drive mountable to the exterior of the casing for driving the chain to which each carriage is affixed, to move the carriages in a linear reciprocating motion. On each carriage is a sensor assembly for detecting hot spots on the rotor of the air preheater.

Abstract: A rotary regenerative air preheater has a heat exchange basket assembly comprising one keystone heat exchange basket disposed between two lateral heat exchange baskets in each outboard sector compartment. The baskets have a trapezoidal shape such that the parallel sides of the keystone heat exchange basket and each lateral basket define the inboard and outboard faces of each basket. Heat exchange elements are loaded into the baskets such that they extend parallel to the parallel sides of each basket. Since the baskets have a trapezoidal shape, the width of the elements in the keystone heat exchange basket and the lateral heat exchange baskets are progressively reduced from the outboard face to the inboard face.

Abstract: A unitary heat exchanger device, for the transfer of total heat, comprising air-to-air heat transfer means and configured such that air may pass there through. The heat transfer means comprisesan air-to-air water vapor transfer element andan air-to-air sensible heat transfer element,the exchanger elements being in air communication with each other. The device may be used in ventilation systems which replace air exhausted from the interior of a building with fresh outside air; the use of the device under cold weather conditions may avoid or attenuate the need for using a defrost mechanism to defrost the device.

Abstract: A fouling sensing system monitors fouling of a rotary regenerative preheater having a housing and a rotor rotatably mounted therein. An emitter for emitting energy is positioned at one of the faces of the rotor and emits energy through the rotor. A sensor is positioned at the other face of the rotor for receiving the energy and generating an output signal indicative of the intensity of the energy.

Abstract: The modular heat exchange baskets for a rotary regenerative air preheater which normally have a single stacked array of heat exchange plates, are constructed with heat exchange plate support bars intermediate the top and bottom surface. The basket then has two separate stacked arrays of heat exchange plates which permits the plate material or arrangement in the top of each basket to be different from the plate material or arrangement in the bottom. For side loaded air preheaters with basket support gratings, the arrangement of heat exchange plates can be changed without the need to move the gratings.

Abstract: A method and apparatus for conditioning air through the removal of moisture from air to be conditioned comprising a first path for a first flow of air to be dehumidified, the first path having an input end and an output end with a first blower between the input end and the output end to effect the movement of air from the input end to the output end; a second path for a second flow of air, the second path being independent of the first path and adapted to remove moisture from the second flow of air, the second path being in a closed loop configuration with a second blower for continuously moving the second flow of air around the second path and with a plurality of temperature changing devices sequentially positioned in the second path including an air precooling device, a cooling condenser device for condensing moisture from the second flow of air, a reheating device coupled to the precooling device, and a heating device; and a desiccant wheel with a motor to rotate the wheel in a continuous path of travel th

Abstract: An arrangement is provided in an air preheater for mounting and adjusting the sector plates and the axial seal plates in relation to the rotor using one adjustable mounting means and a stabilizer assembly. The stabilizer assembly includes a stabilizer beam which is fixedly mounted to the external preheater structure, a pair of stabilizer lugs having one end fixedly mounted to the stabilizer beam, a pair of stabilizer arms each having a first end rotatably mounted to the other end of the stabilizer lugs by a torsion bar which extends between the stabilizer lugs, and a pinned linkage mechanism which rotatably mounts the second end of each stabilizer arm to the sector plate or axial plate.

Abstract: A lifting device for engaging lifting openings in a splitter plate of a heat transfer element basket assembly has first and second opposed hook bodies. Each hook body has an upper engagement portion and a lower portion offset from the upper portion. The hook bodies further define hook openings. A fastener releasably fastens the upper portions of the hook bodies wherein the hook openings define a through-bore and the lower portions define a splitter plate gap. Each hook body further defines a hook portion extending from the offset portion forward the other hook body and across the splitter plate gap. The hook portions are adapted to extend through the lifting openings of the splitter plate when the hook bodies are fastened by the fastener.

Abstract: The rotor of a rotary regenerative air preheater is constructed for the loading of the heat exchange basket modules into the sectors of the rotor in a radial direction through the periphery of the rotor. The heat exchange basket modules are arranged in a plurality of axially spaced layers with the lower baskets supporting the baskets located above. To provide the support and to facilitate the loading of the baskets, each basket includes an integral grating structure at the top surface thereof which extends partially above the uppermost surface of the basket frame. This provides a clear sliding surface as well as a support for the baskets in the layer above. The invention eliminates the support gratings which are a part of the rotor structure, except at the bottom of the rotor.

Abstract: A rotary regenerative air preheater has heat exchange baskets which contain the mass of heat absorbent material commonly comprised of stacked plate-like elements. The heat exchange basket comprises a frame which is open on each end and which is closed on the sides by basket cover assemblies. Each basket cover assembly includes a light gauge membrane which is welded to the interior surface of the basket cover. Shrinkage of the membrane due to the weld imposes a pre-tension on the membrane which resists deformation of the cover assembly by the heat exchange elements.

Abstract: A rotary regenerative air preheater having a rotor mounted to a central rotor post for rotation within a surrounding housing whereby heat absorbent material carried in the rotor is alternately exposed to a flow of heating gas and a gas to be heated. Upper and lower rotor post headers provide means for mounting diaphragms, which divide the rotor into compartments, to the rotor post. The upper rotor post header includes an interior opening for receiving the rotor and an outer peripheral portion having a plurality of circumferentially spaced T-shaped slots. The upper portion of the inboard end of each diaphragm defines a box-shaped lug which is received in one of the slots. Shoulders defined by the lug engage shoulders defined by the slots to prevent radial movement of the diaphragm. The lower rotor post header is mounted to the rotor and includes a radially extending lower portion that defines a shelf.

Abstract: The connecting plate duct assemblies which form the inlet and outlet ducts for a rotary regenerative air preheater have a horizontal flange plate around the periphery. The vertical panels which house the rotor sit on the lower horizontal flange plate and are attached to lower vertical attachment bars extending up from the lower horizontal flange plate. The upper ends of the vertical housing panels are spaced below the upper horizontal flange plate and abut upper vertical attachment bars extending down from the upper horizontal flange plate. The upper ends of the vertical housing panels are welded to these upper vertical attachment bars to hold them in position and to seal the space. Sealing means are provided between the vertical housing panels and the rotor at both the upper and lower ends.

Abstract: A heat transfer device includes a ring having a vertical axis that can rotate inside a cage. The ring is inwardly provided with partitions. A permanent circulation of gaseous effluents is established on one hand between an effluent delivery pipe and a central zone via a first limited angular sector of the ring and on the other hand between the central zone and an effluent discharge pipe 6 via a second limited angular sector of the ring. The ring is charged with a mass of large heat exchange surface material and the device can be used for recovering positive or negative thermal energy. A thermal reactor of the catalytic bed type, for example, can be placed in the central zone for removing volatile organic compounds (VOC). The device may be used for catalytic or thermal oxidation of the organic compounds in gaseous effluents, for example.

Abstract: The concentration of airborne microorganisms can be substantially reduced by passing air containing a concentration of microorganisms through a core of desiccant. Preferably, the core of desiccant is present in a moisture transfer wheel, which forms part of an open-cycle air conditioning system. The preferred desiccant is a large-pored crystalline titaniumsilicate molecular sieve, which can be regenerated into an essentially anhydrous state at a regeneration temperature of less than about 200.degree. F., and thereafter can absorb moisture from air to provide air having a vapor pressure of less than about 3 torr.

Abstract: A swing-arm sootblower for a rotary regenerative air preheater is mounted to sweep across the air preheater rotor at a constant speed or angular velocity. A constant speed motor is attached through a speed reducer to a drive sprocket. A chain drive turns driven sprocket which is connected to the rotatable mounting shaft for the sootblower lance or arm. Limit switches are tripped at the ends of the arc of travel of the lance by a trip arm mounted on the drive sprocket to turn the motor off and to close a valve for the sootblowing medium. The speed of the lance can be adjusted in general or at particular points in the art of travel.

Abstract: The rotor for a rotary regenerative air preheater is fabricated from a combination of shop assembled rotor sector modules and field assembled components so as to eliminate the double plate diaphragms of conventional modular rotors. The shop assembled modules comprise one or more sectors and the field assembled components fit between the spaced shop assembled modules spaced around the rotor hub. The support gratings between the diaphragm plates support modular heat exchange baskets which are loaded into the rotor radially from the periphery.

Abstract: Rotatably supported, regenerative fluid treatment wheel assemblies include a wheel with circumferential rim and track, a housing in which the wheel is disposed and a plurality of rollers disposed within the housing in rolling engagement with the track to locate a wheel axially and radially within the housing. Seal flanges are provided projecting radially outwardly from the rim and are opposed by flexible seals which are clip mounted to walls of the housing surrounding openings through those walls which are aligned with the wheel. At least one wheel is preferably spring loaded so to compensate for any eccentricity in the wheel. The wheel is belt driven. A subassembly, including a mounting plate, flange-mounted motor, drive pulley and spring loaded idler pulley is provided for easy installation and removal. Wear strips appropriate for contact with either the seal flanges or face of the wheel core are applied to the flexible seals by pressure sensitive adhesive.

Abstract: The present invention relates to a device generating a hot air flow, including an air source generating an air flow at its outlet (17), a heating system (13) generating heat energy and heat-exchange elements (27) capable of storing heat energy generated by said heating system (13) and of yielding this heat energy to said air flow.According to the invention, said heating system (13) and said air source are mounted fixed, and said heat-exchange elements (27) are arranged on a mobile support (3) capable of continuously renewing the heat-exchange elements (27) arranged in said air flow and previously heated by said heating system (13).

Abstract: A gas turbine engine includes a gas generator having a compressor, a first turbine member, and a combustor member between the compressor and the first turbine member for increasing the temperature of the fluid medium to be worked upon by the engine. A second turbine is located adjacent to the gas generator and it extracts energy from the fluid medium to produce rotary power. A heat scavenging member is located adjacent to the gas generator for extracting heat from the fluid medium after flowing from said second turbine and for transferring the heat into the fluid medium exiting the compressor by passing the fluid medium at least two times through the scavenging member to heat the fluid medium before flowing into the combustor member.

Abstract: A regenerative heat-exchanger is disclosed which has a rotor mounted in an enclosing housing, with separation zones radially disposed between the heat exchange media and configured as peripheral and radial barrier chambers, and stationary peripheral and radial seals which are arranged on hot and cold sides of the rotor.

Abstract: A high efficiency hot air furnace transfers substantially all of the combustion heat of a clean fuel gas fire to a stream of cool recirculating air by two heat exchangers both of which are mounted in a common plenum through which cool air is recirculated by means of a blower. It differs from the conventional high efficiency furnace in that the secondary heat exchanger is a porous movable heat sink which is alternately exposed to a stream of hot combustion gas and a part of the cool air stream from the recirculating air blower.

Abstract: Air handling system including a heat recovery means including blowers and dampers for controlling air flow and a desiccant wheel movable into and out of the air stream to selectively recover heat from exhaust air and transfer it to outside air. The air handlling system may also include an air conditioning system and an economizer inclulding dampers to control recirculated air and inlet and exhaust air.

Abstract: A process and apparatus for open cycle desiccant cooling wherein the process stream and regeneration stream are divided into a plurality of radial stream segments by non-parallel partitions forming unequal face segments in the desiccant wheel and the heat wheel for the same stream segment. The unequal face segments in the desiccant wheel and the heat wheel provide differing temperature profiles at the face of each wheel and allow obtaining desired temperature profiles for heat exchange and moisture adsorption. The process of this invention results in reduction of the radial speed of the heat wheel to less than 4 providing high effectiveness of the heat wheel increasing the capacity and the COP of the system.

Abstract: A gas turbine engine includes a gas generator having a compressor, a first turbine member, and a combustor member between the compressor and the first turbine member for increasing the temperature of the fluid medium to be worked upon by the engine. A second turbine is located adjacent to the gas generator and it extracts energy from the fluid medium to produce rotary power. A heat scavenging member is located adjacent to the gas generator for extracting heat from the fluid medium after flowing from said second turbine and for transferring the heat into the fluid medium exiting the compressor by passing the fluid medium at least two times through the scavenging member to heat the fluid medium before flowing into the combustor member.

Abstract: In an air preheater with a large lower cold end center section and a smaller, upper hot end center section, the connecting plate duct assemblies on both the hot and cold end are made the same height rather than to have cold end connecting plate duct assemblies which are larger and equal in height to the cold end center section. This minimizes the design and manufacturing costs and provides cold end connecting plate duct assemblies which are smaller, lighter and easier to handle. This then requires that the housing panels around the outside of the rotor be longer to reach between these connecting plate duct assemblies. At the ends of the hot and cold center sections are main support pedestal panels which support the hot end center section above the cold end center section. These main support pedestal panels together with the housing panels complete the rotor housing.

Abstract: A process and apparatus for open cycle desiccant cooling wherein the process stream and regeneration stream are divided into a plurality of radial stream segments by non-parallel partitions forming unequal face segments in the desiccant wheel and the heat wheel for the same stream segment. The unequal face segments in the desiccant wheel and the heat wheel provide differing temperature profiles at the face of each wheel and allow obtaining desired temperature profiles for heat exchange and moisture adsorption. The process of this invention results in reduction of the radial speed of the heat wheel to less than 4 providing high effectiveness of the heat wheel increasing the capacity and the COP of the system.

Abstract: Incompressible ceramic heat exchange blocks which may be catalyst coated having gas flow channels therethrough or other incompressible heat exchange surface are supported in a metal framework to form a removable basket for a rotary regenerative air heater. Between selected rows of the incompressible heat exchange material are layers of compressible corrugated metal heat exchange plates. This layered structure is packed into the framework in the compressed state.

Abstract: A system for protecting the material of a gas-gas heater which receives a raw flue gas for being provided to a desulfurization plant for cleaning of the flue gas comprises a path of raw flue gas having a gas temperature which is provided to the heater. A quench device communicates with the raw flue gas flow for providing a rapid cooling of the raw flue gas. A controller communicates with the flow of raw flue gas and the quench device. The controller has a variable, pre-set temperature value which is the temperature at which the material of the heater can be damaged. The controller monitors the temperature of the raw flue gas for detecting when the temperature of the raw flue gas is greater than the pre-set temperature value for activating the quench device in order to provide a rapid cooling of the raw flue gas until the gas temperature is less than the pre-set temperature value.

Abstract: The heat exchange baskets for a rotary regenerative air preheater are loaded radially into the rotor rather than axially from the duct end. The rotor is divided into sectors by diaphragms, and support gratings are provided in each rotor sector with the baskets being positioned and supported on the gratings. The angle of each rotor sector is smaller than the complimentary angle of each basket such that the outboard end of each basket can contact the diaphragms before the contact of the inboard end. The baskets thereby serve to stiffen the rotor structure while reducing bypass gaps.

Abstract: The invention relates to a method for achieving an optimal energy exchange in regenerative heat exchange between the combustion air and precooled, wet flue gases from a cooling device. By letting the moisture in said flue gases be condensed on the heat transfer surfaces the moisture will be transferred over to the air side where it is vaporized, resulting in some advantages, e.g. an increased energy exchange. According to the invention it has turned out to be possible to achieve a further increase of the energy exchange in a simple way by ensuring that the heat transfer surfaces of the flue gas side become really water-soaked when on the flue gas side, e.g. by letting the condensed water from the precooling device (15) drip or flow down onto the heat transfert surfaces such that said surfaces will remain wet during the entire passage through the combustion air side (10).

Abstract: A high performance, low cost, regenerator/heat exchanger matrix or bed. The bed consists of numerous stretched elastomer sheets separated by spacers and stacked. The resulting matrix is of the parallel plate type with high porosity, and narrow, uniform, unobstructed channels. The bed is ideal for near room temperature regenerator applications. The bed may also be used to pump heat or refrigerate, when fitted with a mechanism which allows the stretch of the elastomer sheets to be rapidly increased and decreased periodically.

Abstract: A heat transfer element basket assembly for a rotary regenerative heat exchanger having a splitter plate or stiffening member mounted between the heat transfer plates at a position intermediate between the inner and outer ends of the basket. The stiffening member includes elongated slots adjacent the top surface which accommodate lifting lugs. Elongated slots and lifting lugs also may be included adjacent the bottom surface of the basket. These lugs slide up and down within the elongated slots to an extended position partially above the surface of the basket when in the lifting mode and to a retracted position fully below the surface when not in use. Since the lugs are retracted when the basket has been placed in the rotor, they will not interfere with the vertically adjacent baskets. This means that the baskets have a low profile and can be tightly packed in the rotor.

Abstract: A Ljungstrom type heat exchanger in which the bottom sector plate is provided with welded sector plate ribs which are welded to ribs secured to the frame of the heat exchanger. The upper surface may be curved to be complementary to the thermally induced curvature of the rotor. The fairings associated with the support for the upper sector plate may be provided with ports for the passage of some hot gases to prevent distortion of the main beam. A cleaning device is disclosed in which a feed pipe is fully retractable having a nozzle at its radially outer end.

Abstract: An air dehumidifying and air pollutant removal system adapted especially to desiccant wheel operation with downstream air filtering, and the discrete use of desiccants for the adsorption of gaseous pollutants as well as water vapor and both of which are desorped by regeneration, and downstream filter packs for the absorbtion of gasses and particulate matter collected thereby and desorbed for exhaust to atmosphere during off periods of building occupancy.

Abstract: Cooling apparatus comprises a cooling chamber such as a freezing tunnel having a pipeline for introducing liquid nitrogen into it and an exhaust passage for cold nitrogen vapor. The exhaust passage extends through a rotary regenerative heat exchanger. Downstream of the heat exchanger is a fan operable to draw the exhaust gas through the heat exchanger. A second passage extends through the heat exchanger and is arranged for the flow therethrough of relatively warm air, whereby, in operation, the air is able to transfer heat to the exhaust gas in the heat exchanger.

Abstract: An air heater perimeter seal provides independent positive control of the leak path induced by relative radial and axial movements at the rotor perimeter. A seal member with a relatively wide seal face disposed in a plane perpendicular to the air heater axis allows the seal member to stay within the radial width of the corresponding seat during expansion and contraction of the rotor as it moves from the air side to the discharge gas side and back. In addition, the installation adjustability and the tolerance for radial error of the seal of the present invention makes it possible for out-of-round rotors and warped housings to be properly sealed. An axial slip joint between the seal member and the rotor allows the seal face to remain adjacent to the face of the sector place and to the seat face regardless of rotor droop. The axial slip joint also acts as a labyrinth seal to control leakage of gasses between the housing and rotor.

Abstract: A regenerative device can thermally treat gases. This device has a housing with a gas inlet and a gas outlet. A cage having a central interior is rotatably mounted in the housing between the inlet and the outlet. A plurality of gas permeable blocks are mounted peripherally in the cage around its central interior to provide therethrough: (a) an incoming flow path from the inlet to the central interior, and (b) an outgoing flow path from the central interior to the gas outlet. This incoming flow path within the blocks is non-converging. A drive motor can rotate the cage to move blocks successively past the inlet and the outlet.

Abstract: A high performance, low cost, regenerator/heat exchanger matrix or bed. The bed consists of numerous stretched elastomer sheets separated by spacers and stacked. The resulting matrix is of the parallel plate type with high porosity, and narrow, uniform, unobstructed channels. The bed is ideal for near room temperature regenerator applications. The bed may also be used to pump heat or refrigerate, when fitted with a mechanism which allows the stretch of the elastomer sheets to be rapidly increased and decreased periodically.

Abstract: Ceramic blocks which may be catalyst coated having gas flow channels therethrough are supported in a metal framework to form a removable basket for a rotary regenerative air heater. The blocks are supported between compressed packing material with individual rows being supported at one inlet edge and the opposite outlet edge by Z-plates.

Abstract: A heat exchange module comprises a rotating-wheel type regenerative heat exchanger unit having a plurality of heat exchange elements mounted in baskets through the volume of the heat exchanger wheel. The heat exchanger wheel rotates about its axis so that the heat exchange elements are heated by a hot gas flow over a portion of the rotation, and transfer the heat to an air flow over another portion of the rotation. At least some of the heat exchange elements include phase change materials, such as salts, that absorb heat while maintaining a constant temperature. The phase change materials narrow the range of temperatures reached by the heat exchange elements located at various positions of the heat exchanger wheel. The phase change materials prevent excessively low temperatures that can result in condensation of corrosive acids on the surfaces of the heat exchange elements.

Abstract: A sheet metal heating package for heat exchangers including a plurality of superimposed sheets having at least a partial profiling for instance embossments leaving free flow channels in between themselves, which sheets carry a coating serving as a surface protection, for instance a layer enamel, the sheet metal heating package having a profiling of the sheets, where at least the border edges of the respectively adjoining directly superposed sheets have a minimum spacing from each other at all points or are aligned so as not to contact each other, the border zones of the sheets and possibly the process technology-wise caused material accumulations arising at the border edges of the coating are in this way protected against chipping or spalling.

Abstract: A heat recovery ventilator having a rotary wheel heat exchanger includes a unique configuration for driving both the rotary wheel heat exchanger and impellers to provide an inexpensive, compact and light-weight ventilator unit adaptable for use across a wide range of residential, commercial and industrial applications. A random matrix media is also used to provide high thermal efficiency in exchanging heat and moisture between inlet and exhaust air streams.

Abstract: A reduction gear for producing and feeding the rotation of a low pressure turbine driven by a combustion gas generated in a combustor to an output shaft is received in a central opening of a rotary type heat exchanger which is disposed so as to be perpendicular to a turbine shaft at a rear portion of a body housing of a gas turbine engine. As a result, not only the engine can be made small but also the output can be produced at to the opposite side of the heat exchanger. The combustor and a collector housing for collecting combustion gas are disposed on diametrical opposite sides in a transverse cross section of the body housing whereby an internal space of the body housing is effectively utilized and an axial dimension of the engine is shortened. Since the compressed air is supplied to the heat exchanger through peripheral walls of the body housing having a double construction, prevention of heat radiation from the body housing and effective utilization of an internal space of the body housing are realized.

Abstract: Regenerative heat exchangers are described for transferring heat between hot and cold fluids. The heat exchangers have seal-leakage rates significantly less than those of conventional regenerative heat exchangers because the matrix is discontinuously moved and is releasably sealed while in a stationary position. Both rotary and modular heat exchangers are described. Also described are methods for transferring heat between a hot and cold fluid using the discontinuous movement of matrices.

Abstract: A temperature monitoring unit has a high degree of sensitivity and reliability even when monitoring the temperature of a relatively large rotary heating element. The temperature monitoring unit includes a mirror which is provided in the vicinity of the rotary heating element and is oriented to reflect infrared rays from the heating element in the radial direction thereof, the mirror being reciprocated linearly in the radial direction, a condenser lens provided radially outwardly of the heating element for converging the infrared rays reflected by the mirror, an infrared sensor on which the converged rays impinge, a plate provided between the mirror and the lens and which has a slit therein that is elongate in a direction approximately perpendicular to the surface of the heating element, and an image processor receiving the output of the infrared sensor. The sensitivity is high because infrared rays from around the thermal point of the heating element are blocked by the plate.

Abstract: A heat recouperator having a rotary wheel heat and moisture exchanger uses a random matrix media comprising a plurality of small diameter heat-retentive fibrous material which provides high thermal efficiency in exchanging heat and moisture between inlet and exhaust air streams.

Abstract: A heat recovery ventilator having a rotary wheel heat exchanger uses a random matrix media of randomly interrelated small diameter heat-retentive fibrous material to provide high thermal efficiency in exchanging heat and moisture between inlet and exhaust air streams for residential, commercial and industrial applications.

Abstract: Method for the removal of nitrogen from the exhausts of burners after they are cleaned of dust or sulfur, in which the nitrogen-bearing exhaust gases are reheated by the transfer of heat from the denitrogenated exhaust gases in a regenerative heat exchanger.Before they are finally heated to the temperature level of the reduction reaction, the nitrogen-bearing exhaust gases, and, after their reduction, the denitrogenated exhaust gases, are passed countercurrently to one another in a cyclical alternation, through heat exchanging storage masses in an additional catalytic converter serving as the main converter, whose surfaces are provided with catalytically active compounds.

Abstract: An improved element basket for a rotary air preheater includes a tubular structural element disposed in each of the four corners of the basket frame and extending therethrough in mutually parallel relation. During installation of the basket into the preheater rotor, rods are provided each having an attachment member formed in one end. The rods are inserted into the tubular elements and retaining clamps are attached thereto to prevent withdrawal. A chain or rope is attached to the attachment members, thus allowing the basket to be conveniently drawn into a desired position in the rotor.