Patent DE-102007000706-A1 (DE)
Title: Device for degassing fluid/pasty medium such as coating color for coating paper web/cardboard, comprises low pressure chamber in which low pressure is generatable, and inlet arrangement, which guides the medium in the low pressure chamber
Inventor: STELLNER BERND-UWE
IPC: B01D19/00
Filed: 2007-09-07
Abstract: The device for degassing a fluid or pasty medium such as coating color for coating paper web or cardboard, comprises a low pressure chamber (16) in which a low pressure is generatable, an inlet arrangement (12), which guides the medium in the low pressure chamber, an outlet arrangement (34), which discharges the medium from the low pressure chamber, a sling plate (24a, 24b) arranged in the low pressure chamber, a plump arrangement (30a) extending itself around the circumference of the sling plate, and a tempering arrangement. The device for degassing a fluid or pasty medium such as coating color for coating paper web or cardboard, comprises a low pressure chamber (16) in which a low pressure is generatable, an inlet arrangement (12), which guides the medium in the low pressure chamber, an outlet arrangement (34), which discharges the medium from the low pressure chamber, a sling plate (24a, 24b) arranged in the low pressure chamber, a plump arrangement (30a) extending itself around the circumference of the sling plate, and a tempering arrangement for controlling/regularizing the temperature of the section of the device. The medium in the low pressure chamber is guidable on the sling plate. The sling plate or sling edge is rotatable for the rotation around a vertical rotation axis. The plump arrangement reaches in the low pressure chamber against the medium delivering from the sling plate. The plump arrangement is implemented with plump edges arranged in circumference direction, and with openings arranged by a plump area and/or the plum edge in the circumference direction. The plump arrangement is arranged stationary in the low pressure chamber and is guided against a container wall limiting the low pressure chamber. The plump arrangement is formed by a section of a guiding arrangement intended in the low pressure chamber. A subjacent further sling plate guides the medium or the plump arrangement serves as guiding arrangement. The plump arrangement is separately guided against the guiding arrangement. The plump arrangement or plump element is held or arranged inside of the container wall or the guiding arrangement. The plump arrangement and/or the guiding arrangement guides in multi-sectional manner and/or is passed from the low pressure chamber. The plump arrangement comprises plump elements arranged to each other that form plump edges and/or plump areas. The plump elements project a section of a guiding element of the guiding arrangement by a holding circumferential part radially towards interior and are arranged in circumference direction. The plump arrangement comprises a group of plump elements that form plump edges and/or plump areas. The plump elements are formed by internal teeth of the circumference part of the plump arrangement. The internal teeth have asymmetrical teeth. The medium impact angle at the side of the teeth serving as plump area is enlarged against a symmetrical tooth formation. The plumping arrangement comprises a sieve arrangement, a grid arrangement or perforated element arrangement that has opening limited by a plump area and/or the plump edges. The sling plate is movable for the rotation around the vertical rotation axis. The sling plate comprises a stationary sling plate section and a sling edge movable for the rotation around the vertical rotation axis. The sling plate is arranged with a sieve edge serving as sling edge. The inlet arrangement guides the medium, which distributes itself around a center of an upper sling plate or stationary distribution plate. The inlet arrangement delivers the medium around the centre of the upper sling plate or stationarily distribution plate. The inlet arrangement comprises discharge opening, which delivers the medium simultaneously on the surface of the upper sling plate and/or distribution plate. The sling plates are vertically arranged above one another. The tempering arrangement heats a collecting section of the device in which the medium is collected. The tempering arrangement cools a section of the inlet arrangement or a section of the device arranged in flow direction of the medium upstream of the inlet arrangement. The drive unit is coolable for rotatably driving the sling plate and/or its sling edge by a rotational shaft and/or swivel of the rotational shaft and/or the rotational shaft by the tempering arrangement. The medium is guided or temperable with the interacting elements in the interior of the low pressure chamber through the tempering arrangement. The device is operatable with a pressure in the interior of the low pressure chamber equal or smaller than a loading vapor pressure of the medium. The medium comprises a binding agent and a pigment and has a solid material content of 50-80 wt.% and/or a viscosity of 700-4000 mPas. Independent claims are included for: (1) a coating device; and (2) method for degassing a fluid or pasty medium such as coating color for coating paper web or cardboard.