Implingement drying unit and a dryer section
First Claim
1. An impingement drying unit for a dryer section of a machine making a fibrous web, advantageously a paper or board machine, which comprises at least one drying group (R) and an impingement drying unit (10) in which the fibrous web (2), advantageously a paper or board web, i.e. a web, has been arranged to be conducted past the impingement drying unit while supported by a drying fabric (1), such as a wire or equivalent, characterised in that the impingement drying unit (10) extending at least partly above or below a horizontal plane which passes through the uppermost or lowermost drying cylinder(s) (3) of the drying group (R) and being parallel to the machine level, comprises at least one impingement surface or face (IP1, IP2) the side profile of which is straight, changeably curved in its radius of curvature, in the shape of a broken line or a selectable combination of these, and that the impingement surface or a tangent to the impingement surface or a line passing via the beginning and the end of the impingement surface or an extension of said line forms on the impingement side an angle of ≦
- 120°
with a horizontal plane parallel to the machine level.
2 Assignments
0 Petitions
Accused Products
Abstract
An apparatus for a dryer section of a paper or board machine[, which comprises] has a drying group (R) and an impingement drying unit (10) which is placed above and/or below a row (DSR) of drying cylinders (3)[and in which a]. A drying fabric (1) supported paper or board web (2) [has been arranged to be]is conducted past the impingement drying unit [while supported by a drying fabric (1), such as a wire or equivalent. The invention is characterised in that the impingement drying unit (10) comprises] (10) having at least one impingement surface (IP1, IP2) the side profile of which is straight, changeably curved in its radius of curvature, in the shape of a broken line or a selectable combination of these, and that the impingement surface or a tangent line to the impingement surface or a line passing via the beginning and the end of the impingement surface or an extension of [said] the line forms on the impingement side an angle with a horizontal plane parallel to the machine level, which angle is ≦120[°]°, advantageously [in a range of 120°-60°]120°-60°, most advantageously about 90[°]°.
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Citations
25 Claims
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1. An impingement drying unit for a dryer section of a machine making a fibrous web, advantageously a paper or board machine, which comprises at least one drying group (R) and an impingement drying unit (10) in which the fibrous web (2), advantageously a paper or board web, i.e. a web, has been arranged to be conducted past the impingement drying unit while supported by a drying fabric (1), such as a wire or equivalent, characterised in that the impingement drying unit (10) extending at least partly above or below a horizontal plane which passes through the uppermost or lowermost drying cylinder(s) (3) of the drying group (R) and being parallel to the machine level, comprises at least one impingement surface or face (IP1, IP2) the side profile of which is straight, changeably curved in its radius of curvature, in the shape of a broken line or a selectable combination of these, and that the impingement surface or a tangent to the impingement surface or a line passing via the beginning and the end of the impingement surface or an extension of said line forms on the impingement side an angle of ≦
- 120°
with a horizontal plane parallel to the machine level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- 120°
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12. A dryer section of a machine making a fibrous web, advantageously a paper or board machine, which comprises at least one drying group (R) applying single-wire draw or twin-wire draw and an impingement drying unit (10) for drying the fibrous web, advantageously a paper or board web, i.e. a web (2), and a drying fabric (1), such as a wire or equivalent on whose support the web has been arranged to be conducted past the impingement drying unit, characterised in that the impingement drying unit (10) extending at least partly above or below a horizontal plane which passes through the uppermost or lowermost drying cylinder(s) (3) of the drying group (R) and being parallel to the machine level, comprises at least one impingement surface or face (IP1, IP2) the side profile of which is straight, changeably curved in its radius of curvature, in the shape of a broken line or a selectable combination of these, and that the impingement surface or a tangent line to the impingement surface or a line passing via the beginning and the end of the impingement surface or an extension of said line forms, on the side of impingement, an angle of ≦
- 120°
with a horizontal plane parallel to the machine level. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
- 120°
Specification