Abstract: The present invention relates to a gas fired infrared radiation emitter comprising a burner plate (140) acting as combustion surface and a radiant screen (160) positioned at the combustion side of the perforated tiles. The radiant screen is embossed (180) proving locally different distances between the burner plate and the radiant screen. The result is a higher performance of the gas fired infrared radiation emitter.

Abstract: A drying installation (1) and method for drying of products (3). More in particular, the invention relates to a drying installation (1) and a method for drying sludge or mud, as e.g. the drying of wastewater and industrial sludge possibly contaminated with toxic or corrosive components. The dryer installation (1) comprises infrared emitters (5) which are protected and/or insulated from the evaporation products (7) exiting the drying product (3).

Abstract: The present invention relates to a gas fired infrared radiation emitter comprising a burner plate (140) acting as combustion surface and a radiant screen (160) positioned at the combustion side of the perforated tiles. The radiant screen is embossed (180) proving locally different distances between th burner plate and the radiant screen. The result is a higher performance of the gas fired infrared radiation emitter.

Abstract: A drying installation (1)and method for drying of products (3). More in particular, the invention relates to a drying installation (1) and a method for drying sludge or mud, as e.g. the drying of wastewater and industrial sludge possibly contaminated with toxic or corrosive components. The dryer installation (1) comprises infrared emitters (5) which are protected and/or insulated from the evaporation products (7) exiting the drying product (3).

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.

Abstract: Infrared drier installation (1) for a passing web (2), which installation ( ) has gas-heated infrared radiant elements (5), arranged one next to the other so as to form a unit (4). Each unit comprises at least two adjacent rows (8) of gas-heated infrared radiant elements (5) stretching out in he transversal?(9) direction of the web (2) substantially over the entire with of the web (2). The infrared drier installation comprises means to recycle, at least partially, the said combustion gases. The drier installation as subject of the present invention is characterized in that the infrared drier comprises means (16) to avoid the suction of cold air between two adjacent rows of radiant elements (5).

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).

Abstract: An appliance for providing air and gas to a gas burner includes a gas tube and an air tube. The gas tube comprises an aperture for providing gas inwards to the air tube. The air tube comprises a first aperture for receiving a back tube of the gas burner. The gas tube is provided with a first part of a detachable connection device, for receiving a second part of the detachable connection device provided on the back tube for allowing gas from the gas tube to enter the back tube. The back tube has an orifice for allowing air from the air tube to enter inside the back tube.

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.

Abstract: The object of the invention is an dryer in the dryer section (26) of a machine for treating or producing a web (12). This drying section (26) has, amongst other things, a burner assembly (10), wherein this burner assembly (10) is adapted to produce a flame (14) and exhaust gases (18). Either said flame (14) or the exhaust gases (18) or both are in direct contact with the web (12) to be dried. The flame (14) or the exhaust gases (18) or both cover the maximum width of the web (12) to be dried and this at a temperature exceeding 600° C., e.g. above 700° C., e.g. 800° C., preferably 1000° C. and more. By applying such a high temperature to the web (12) to be dried, one achieves a large temperature difference, resulting in a better heat transfer Considering the theoretical equation of heat transfer qx=kx. Ax.DTx, it is evident that because of the large temperature difference, the dimensions of the system can be reduced and/or the efficiency of the drying process can be refined.

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).

Abstract: The invention relates to an appliance for providing air and gas to a gas burner (2) comprising a back tube (13) for receiving air and gas to be combusted. The appliance comprising a gas tube (10) and an air tube (11), the gas tube comprising an aperture (9) for providing gas inwards to the air tube. The air tube comprises a first aperture (18) for receiving the back tube of a gas burner. The appliance is characterized in that the aperture of the gas tube is provided with a first part (25) of a detachable connection device, for receiving a second part (28) of the detachable connection device provided to the back tube for allowing gas from the gas tube to enter the back tube. The gas burner comprising a radiant panel (14), and a back tube for providing air and gas to the radiant panel. The back tube has an orifice (20) for allowing air from the air tube to enter inside the back tube.

Abstract: Infrared drier installation (1) for a passing web (2), which installation ( ) has gas-heated infrared radiant elements (5), arranged one next to the other so as to form a unit (4). Each unit comprises at least two adjacent rows (8) of gas-heated infrared radiant elements (5) stretching out in he transversal?(9) direction of the web (2) substantially over the entire with of the web (2). The infrared drier installation comprises means to recycle, at least partially, the said combustion gases. The drier installation as subject of the present invention is characterized in that the infrared drier comprises means (16) to avoid the suction of cold air between two adjacent rows of radiant elements (5).

Abstract: There is provided a delay time calculation method, which simplifies a delay time calculation of an interconnection wiring which includes inductance, within a semiconductor integrated circuit, so that the calculation can be executed by use of the delay time calculating CAD tool used in the prior art.

Abstract: Pharmacologically active compounds of formula I ##STR1## which can be substituted in the phenyl rings and in which R.sup.1 denotes hydrogen or lower alkyl,R.sup.2 denotes hydrogen or lower alkyl,Y denotes oxygen or sulfurn represents an integer from 1 to 3Z represents a bond, a CO group or a CH.dbd. group,Q denotes nitrogen or the CH group andR.sup.7, if Q denotes nitrogen, represents an optionally substituted pyridyl or phenyl radical or, if Q denotes the CH group, represents the N-methyl-N-(4-oxo-3H-pyrimidin-2-yl)amino group,and their acid addition salts and processes and intermediates for their preparation.

Abstract: A drying equipment comprised of a battery of radiant heaters, a suction hood and a blower hood. It is designed to dry a moving material, paper in particular, and is equipped with a fire prevention system integrated into its cowl. The fire prevention system comprises a spraying manifold supplying a flow of steam and then a steam and water mixture to reduce the temperature of the steam.