Abstract:
A portable catalytic heating apparatus, usable for drying, curing, polymerization or cross-linking of coatings and compounds, such as organic compounds, includes a catalytic combustion chamber, a support pan for the combustion chamber, an adaptor connecting the combustion chamber to a fuel supply, a regulating valve for controlling a flow of fuel, an injector for mixing the fuel with air and for providing a uniform fuel-air mixture to the combustion chamber. The heating apparatus may comprise an integral fuel supply and may further comprise moveable handles and/or straps enabling easy carrying and positioning. The heating apparatus may be handportable. Before the heating apparatus is used, it may be attached to a base equipped with piezoelectric means of igniting the fuel-air mixture. Even if the apparatus is operated inside a hazardous location, its ignition base may remain outside hazardous locations at all times.
Abstract:
The present invention concerns a convective system for a dryer installation for a passing web, more particularly paper. The convective system 7 is an assembly of an exterior casing 13 for suction of combustion products with opening 14 towards the web, with a first 15 and second 16 suction ducts sucking the combustion products into the convective system 7. The combustion products coming from the first suction duct 15 are guided through the exterior casing 13 to a mixing and blowing device 17. Cold air 18 is mixed in this mixing and blowing device 17 with the combustion products 19, resulting in a gas mixture with lower temperature 20. The convective system 7 also has an internal casing 21 inside the external casing 13. This internal casing 21 has at least one opening towards the web 22 and has also openings 34 allowing gas flow from the mixing device 17 to the internal casing 21 of said gas mixture 20. Under the internal casing 21, there is also a blowing duct 23. The second suction duct 16 is also arranged under this internal casing 21 thereby extracting a second flow of combustion products 24 into the internal casing 21. This second flow 24 of combustion products is then mixed with the gas mixture 20 coming from the mixing device 17, resulting in a mixture of gasses 25 with a temperature that is higher than the first gas mixture 20 and higher than e.g. 350 °C or 370 °C, more preferably 390 °C or 410 °C, even more preferably 420 °C, 450 °C or 500 °C. These hot gasses 25 are then blown to the drying web by the blowing duct 23 of the internal casing 21.
Abstract:
An autoclave is provided for heat treatment of a load whose position relative to the autoclave , whose cross-section and/or whose thermal characteristics may vary along the load, e.g. large panels for an airliner. The autoclave comprises a chamber for receiving the load, a wall of said chamber providing one end thereof and a door providing the other end of the chamber and giving access for insertion and removal of the load. Means (110, 112) is provided for heating gas in the chamber, and a plurality of gas circulation means (114-130) are provided spaced along the length of the autoclave and each producing a zone for circulation of heating gas. Means (74-92; 114-130; 144-148; 150-154) is provided for independent control of the rate of heat transfer between the heating gas and the load in said zones and said gas circulation means is arranged to produce a pattern of circulation in which heating gas impinges non-axially onto the load.
Abstract:
A lumber prepared by artificially destroying pit membranes on cell membranes of cells constituting the lumber, and then easily attaining the dried condition of the lumber. In the lumber obtained from the wood cut down, a torus in a pit membrane portion closes one of, especially, a pair of pits or the opposite pit thereof, so that the water in the cell becomes hard to escape. In view of this inconvenience, the present invention aims at preventing the pit membrane portion from being closed, i.e., destroying such a pit membrane portion, whereby the escaping of the water from the cell is promoted after the destruction of the pit membrane portion. According to the present invention, the lumber to be processed is left as it is for a predetermined period of time in a treatment chamber filled with smoke due to a wood gas generated by a wood fuel burnt, whereby the accumulation of heat and multiplication of far infrared radiation are done by the far infrared radiation occurring when the wood fuel is burnt, components existing in the wood gas, and a far infrared radiation multiplication ceramic material provided in a combustion furnace or a highly dense lava accumulated as proper voids are made. A large amount of far infrared radiation is applied to the lumber to be processed, so as to prevent one pit or the opposite pit out of the two pits from being closed with the torus in the pit membrane in the lumber and generate hollow spaces in these pits.
Abstract:
A method is disclosed for the on-site surface coating of a structure, said structure being part of a construction comprising a plurality of structures, the method comprising the steps of: a) Applying one or more layers of a protective coating system on-site to at least a part of the structure, b) arranging at least one portable gas catalytic infrared emitting unit in a position so that the infrared radiation is adapted for heating the one or more layers of the protective coating system on-site and c) accelerating the drying and/or curing of the one or more layers of the protective coating system by irradiating the coated surface with infrared radiation emitted by the at least one gas catalytic infrared emitting unit on-site.
Abstract:
A drier installation (1) for drying web (2), more particularly paper, which installation is provided for drying a maximum web width, the installation (1) comprises gas-heated radiant elements (3) for radiating the web, arranged according to at least one row (4) stretching out in the transversal (5) direction over the substantially entire maximum web width. The installation (1) comprises at least a transversal convective system (7, 36) equipped with suction and blowing devices (8) for sucking at least part of the combustion products produced by the radiant elements (3) by means of a suction duct (13) and for blowing this pa o the combustion products towards the web (2) by means of a blowing duct (14). Both suction (13) and blowing (14) ducts stretch out in the transversal (5) direction of the web (2). The convective system (7, 36 comprising at least a mixing device (12, 22, 28, 37, 46) installed opposite of the passing web (2) in relation to corresponding suction (13) and blowing (14) ducts and arranged so as to suck and/or blow the combustion products. The drier installation as subject of the present invention is characterized in that the vector average of the projections (V1, V2, V3, V5, V6, V7, V8) in a plane (P1) perpendicular to the web ( ) and stretching out in the transversal (5) direction of the web (2), has component (V4) parallel to the web (2) that is smaller than the maximum web width of the web (2), the vectors representing the respective trajectories of the different jets of sucked and/or blown combustion products.
Abstract:
An infrared heating unit (2) comprises a housing (6, 8) and a heat resistant, porous ceramic matrix (10) received in the housing having an inner surface (12), side walls (13) and an external surface (14). There is at least one resilient anchoring strip (25) extending between the ceramic matrix and the housing about the perimeter of the ceramic matrix to retain the ceramic matrix in place within the housing and seal the edges of the ceramic matrix. The resilient anchoring strip is adapted to expand or contract to accommodate relative movement of the ceramic matrix with respect to the housing due to heating expansion of the housing.
Abstract:
The inventive paint dryer, comprises a cabin (12) for housing objects (15) that are to be painted and dried. At least one fresh air supply (8) is provided in order to introduce fresh air into an air circulation system pertaining to the dryer (1) resulting in the circulation of said air. At least one pure gas supply line (7) is provided, wherein thermally cleaned and heated waste air is introduced as a pure gas, thereby maintaining the waste gas circulated in the circulation system at the desired temperature in such a way that objects (15) arranged in the cabin (12) can be dried by radiation and/or convection. The pure gas supply line (7) is surrounded by the fresh air supply line (8) at least along a longitudinal pipe segment and at least in said longitudinal pipe section the pure gas supply pipe (7) is constructed in such a way as to allow for the transmission of heat to fresh air flowing into the fresh air supply (8). The invention also relates to a paint dryer unit comprising several paint dryer modules which are positioned one after the other and configured as paint dryers according to the invention.
Abstract:
In an apparatus for continuous heat treatment, a mechanically fluidized stream of material consisting preferably of a granular or highly viscous material is heated in a rotating chamber in co-current with heat energy originating from a burner (1), in which solid, liquid or gaseous fuel is burned. A portion of the energy liberated by the combustion heats the internal part of a thin-walled chamber (5), the external part of which at the material inlet (10) transfers energy to said stream of material in the form of radiant heat. The remaining portion of the energy liberated by the combustion, bound in the exhaust gases from the combustion process, are subjected to heat exchange in a primary convective heat exchanger (7) and one or more secondary heat exchangers (8) in counter-current with a gaseous process medium, preferably atmospheric air, said process medium transferring further energy to said stream of material in the form of convective energy.
Abstract:
In connection with heat treatments of particulate materials, primarily organic material such as grains and seeds, the particles of the material are caused to move in a floating or falling state in a treatment area (15). While floating in the treatment area, the particles are heat treated or thermally processed by emitting into the treatment area a heat flux which includes an increased proportion of radiant heat and thereby provides an intensive heating of the individual particles. A heater, in particular for use as heat source comprises at least one burner (16) which is mounted in a heater mantle (10) defining a flame chamber (12) and a heat discharge opening (14). The burner (16) is directed towards a mantle wall portion (18) which is located opposite to the heat discharge opening (14), and the inner surface of the mantle wall portion (18) consists of or is lined with a fireproof material which has the ability to glow and thereby provide heat radiation through the discharge opening (14).