Abstract:
A combined radiant and convection oven (100) controls the rate at which heat is transferred to an object (103) being dried within the oven by varying the flow rate of convection air delivered to the oven's heating chamber (114). The radiating surfaces (191, 192) within the oven (100) are heated by a novel arrangement of longitudinally extending ducts (177, 179), each duct associated independently with a different radiating surface.
Abstract:
Die Erfindung betrifft ein Verfahren zur Trocknung eines Erzeugnisses (2) in einer Trocknungsanlage, wobei das Erzeugnis (2) von mit einem ein organisches Lösemittel enthaltenden Stoff behandelt ist mit folgenden Schritten: a) Erwärmen des Erzeugnisses (2) mittels Infrarotstrahlung (21) und Verdampfen des Lösemittels unter Ausbildung eines Lösemitteldampfs, b) Abführen des Lösemitteldampfs aus der Trocknungsanlage, c) Zuführen zumindest eines Teils des Lösemitteldampfs zu einem Brenner (3) und Verbrennen des Lösemitteldampfs mit dem Brenner (3), und d) Verwenden der beim Verbrennen des Lösemitteldampfs entstehenden Infrarotstrahlung (21) zum Erwärmen des Erzeugnisses (2) im Schritt a).
Abstract:
Bei einer Vorrichtung zum Temperieren von Gegenständen, insbesondere zum Trocknen von beschichteten Fahrzeugkarosserien, ist ein Gegenstand (12) mittels eines Transportsystems (30) in einer Transportrichtung durch einen in einem Gehäuse (14) untergebrachten Temperiertunnel (16) transportierbar. Es ist wenigstens eine Temperiereinrichtung (35, 50; 35, 70) zum Temperieren des Gegenstandes (12) vorgesehen. Außerdem ist eine Lokaltemperiereinrichtung (50; 70) vorhanden, mittels welcher lokal begrenzte Bereiche des Gegenstandes (12) gezielt temperierbar sind und welche hierzu mehrere unabhängig voneinander aktivierbare und ansteuerbare Temperiereinheiten (52; 72) umfasst. Ferner ist ein Verfahren zum Temperieren von Gegenständen, insbesondere zum Trocknen von beschichteten Fahrzeugkarosserien genannt, bei welchem Gegenstände (12) durch einen Temperiertunnel (16) transportiert werden und mittels wenigstens einer Temperiereinrichtung (35, 50; 35; 72) temperiert werden, wobei lokal begrenzte Bereiche des Gegenstandes (12) mittels einer Lokaltemperiereinrichtung (50; 70) gezielt temperiert werden.
Abstract:
The invention relates to a heater, a heating system, use of such heating system for curing a coating and a method for curing a coating. The heater (100) generates heat by catalytic oxidation of gaseous hydrocarbon; and said heater comprises: an arrangement (2) of one or more panels (4); wherein one or more of said panels each comprising: an enclosure (6) comprising a heat radiating front surface (8), and a back surface (10); a catalyst pad (12), said catalyst pad comprising a catalyst (14) capable of catalytically oxidising a hydrocarbon exothermically; a heat insulating material (16) arranged between said catalyst pad and said back surface; means (18) for supplying and distributing gas to said panel. The heater is characterised in that two points (P1, P2) exist on said one or more heat radiating front surfaces (8) of said one or more panels of said heater; said points (P1, P2) defines initial points of two normal vectors (vl, v2) respectively of said surfaces, wherein the mutual angle, α between said two normal vectors (vl, v2) lies within the range of 70 -180°. The invention also relates to a heating system comprising one or more of such heaters. Additionally, the invention relates to the use of the heater or the system for drying and/or curing a coating of a coated surface of a structure and to a method for drying and/or curing a coating.
Abstract:
Embodiments of the present invention generally relate to a polymer treatment device (100) for providing a treatment to a polymer bed (4) having granules (2) of a polymer that are in a solid- state, a computer-readable medium associated with a controller thereof, and an associated molding system (1000). The polymer treatment device 100 includes a polymer supporter (110) with which to support, in use, the polymer bed (4), a radiant heater (120) with which to heat, in use, the polymer bed (4), a first fluid dispenser (140-1) with which to dispense, in use, a first treatment fluid (102-1), and a first fluid vent (150-1) with which to vent, in use, the first treatment fluid (102-1), along with a diffusate from the polymer bed (4) potentially entrained therewith. Furthermore, the first fluid dispenser (140-1) and the first fluid vent (150-1) are arranged to promote a flow of the first treatment fluid (102-1) through the polymer bed (4) in between the granules (2) thereof.
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 q x = k x . A x .DT x ,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. A further advantage of the higher energy transfer is that the drying process is accelerated and that the web can pass the dryer at high speeds.
Abstract translation:本发明的目的是一种用于处理或生产网(12)的机器的干燥部(26)中的干燥器。 该干燥部分(26)具有燃烧器组件(10),其中该燃烧器组件(10)适于产生火焰(14)和废气(18)。 所述火焰(14)或废气(18)或两者都与要干燥的幅材(12)直接接触。 火焰(14)或废气(18)或两者都覆盖待干燥的幅材(12)的最大宽度,并且在超过600℃的温度下,例如, 高于700℃。 800℃,优选1000℃以上。 通过将这样高的温度施加到要干燥的纤维网(12)上,可以实现较大的温差,导致更好的热传递。 考虑到热传递的理论方程式x x = k x x。 显然,由于温度差大,系统的尺寸可以降低和/或干燥过程的效率可以是 精制。 更高能量转移的另一个优点是加速了干燥过程,并且幅材可以高速地通过干燥器。
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:
Heat irradiation apparatus (1) defined in terms of the following: - Refractory flexible irradiation module (7) comprising stopping means which are high temperature resistant and avoid shadow zones and side losses of heat at the burning zone in the ceramic surface; - Employment of refractory flexible ceramic plates (15) having flexible pores which permit air/gas modulation, the flexible pores permit define the path of the air/gas mixture through the ceramic plate (15). When the flow pressure of mixture is reduced, part of the pore automatically close and the combustible mixture is conducted to the surface where the hot fibers are placed. The fibres keep the combustion active at the surface, multiplying IR heating effects. Ceramic plates (15) of the art tend to "swallow" the flame causing an inner burning and reducing the efficiency of the process and/or loss of the control of the flame and equipment explosion. - Sensors and measuring means are provided for monitoring all steps: Thermal sensor (14) - safety device applied in the lower face of each flexible fibrous ceramic module (15), more particularly fixed in the support screen of the ceramic plate (15) and extending to median line of such plate (15), for monitoring a possible heat flow inversion due to external factors which cause the "flame swallowing". The apparatus further comprises oxygen measuring means (23) and an ultraviolet flame detector (24).
Abstract:
Known gas-heated infrared radiators for infrared drying units have a radiator housing (1) that is subdivided by a gas-permeable burner plate (5) in a distribution chamber (6) for the gas-air mixture and a combustion chamber (7), the front side of which emits the radiation. The radiator is held by mixing tube (9) that is affixed to the rear side. A gas-air mixture is supplied to the distribution chamber (6) via said mixing tube (9). The mixing tube (9) has a gas nozzle (11) with a gas inlet (12) and an air inlet (17) on the end opposite the radiator housing (1). The mixing tube is affixed to a holding frame of the drying unit. In order to disassemble the infrared radiator from the infrared drying unit and to mount said radiator on said unit as rapidly as possible, the rear side of the radiator housing (1) is connected to the holding frame by releasable fixing means (20, 33-36) that can be released manually from the front side.
Abstract:
A method and a device for stabilising the web run in a paper machine or the like having a blow suction module (12) mounted above and/or below the web. The blow suction module comprises a blow nozzle unit (14) extending across the web, through which gas, such as air or combustion gas, is blown against the web (10) from the blow nozzle unit, and a first air discharge unit (18) arranged on the front side of the blow nozzle unit, and a second air discharge unit (22) arranged on the back side of the blow nozzle unit, which remove air or gas from between the web and the blow suction module. The blow suction module is asymmetric regarding the first and second air discharge units, so that more air or gas is discharged via the first air discharge unit than via the second air discharge unit.