摘要:
Process and apparatus for drying a material web. The process includes guiding the material web to at least one heated area having a jacket surface of a cylinder having a diameter of between about 4-10 meters, setting the material web, having a dry content of between about 45-55%, onto the at least one heated area, maintaining the material web in uninterrupted contact with the at least one heated area at least until the material web achieves a firmness sufficient for detaching the material web from the heated area, and detaching the material web from the at least one heated area with a dry content of between about 55%-65%.
摘要:
In a drying section of a machine for producing a material web such as, in particular, a paper or cardboard web, a pick-up suction roll, in particular a larger pick-up suction roll, is provided between the last pressing nip of a pressing section and a subsequent impingement drying unit, which suction roll removes the material web from a pressing felt guided through the pressing nip or from a transfer belt and transfers it to the impingement drying unit.
摘要:
Process for determining disturbances of a moisture cross profile of a fibrous material web in a paper making machine, a paper making machine, and a measuring arrangement for measuring the disturbances, the process including guiding the fibrous material web by way of at least one water-permeable belt and collecting and draining off water released from the belt. The water is collected by several sections separated from one another. The process further includes measuring per time unit, the amount of water in each section, wherein the sections extend at right angles to a web running direction over only a partial section of the fibrous material web. The paper making machine includes at least one water-permeable belt, the belt being wrapped around a roll. The measuring arrangement includes a water collection device having the form of one of a trough or channel.
摘要:
A drying cylinder for drying a fibrous web, the cylinder having an inner chamber connected to a pressurized air source; and an outer cylinder jacket having an air-permeable region which is adapted to contact the fibrous material web. Also a drying section for drying a fibrous web, including at least one drying cylinder having an inner chamber and an outer cylinder jacket having an air-permeable region; a circulating belt arranged to press the fibrous web against the outer cylinder jacket and belt being arranged to partially wrap around the drying cylinder; and a pressurized air source connected to the inner chamber is described. Finally, a process for drying a fibrous web in an apparatus that includes at least one drying cylinder having an inner chamber and an outer cylinder jacket having an air permeable region, the process including pressurizing the inner chamber of the drying cylinder with air; and guiding the fibrous material web partially around the drying cylinder with a circulating belt wherein the circulating belt presses the fibrous material web against the air permeable portion of the cylinder jacket is described.
摘要:
Device and method for draining a web in a paper production machine. The device may include a press section having at least one press nip for draining and smoothing the web. The at least one press nip may be arranged to smooth one surface of the web more than its opposite surface and the device may also include a roughening device that roughens the one surface of the web. The method may include guiding the web through a press section of the paper production machine to drain and smooth the web in which the press section include at least one nip, smoothing one surface of the web more than its opposite surface in the at least one nip, and roughening the one surface.
摘要:
A wet section of a machine for producing a fibrous material web that includes at least one press. The press includes a nip through which the fibrous material web is guided. The fibrous material web is preformed in a web forming zone. At least one press is an elongated nip press that is elongated in direction of the web travel. This nip is positioned in a region where the dry matter content of the preformed fibrous material web that comes into the nip is less than or equal to about 15% and, preferably is less than or equal to about 12%. A method for treating a fibrous material web in a wet section of a machine for producing the fibrous material web. The wet section includes at least one press including an elongated nip, at least one press and the elongated nip are elongated in a web travel direction. Further, the elongated nip is positioned in a region of the machine where the dry matter content of the fibrous material web, as it enters the elongated nip, is less than or equal to about 15%. The method includes preforming the fibrous material web in a forming section of the machine, guiding the fibrous material web to the at least one elongated nip, and pressing the fibrous material web in the at least one elongated nip elongated nip.
摘要:
The present invention relates to a dryer section of a machine for the production of fibrous web, such as a paper web. The dryer section comprises at least one dryer group having at least one drying cylinder and an endless porous support belt that guides the web around each cylinder. This is followed by a reversing roll being formed as a suction roll. With the web being supported by said porous support belt the web directly contacts said reversing roll. A distance of at least 150 mm is provided between the cylinder and the reversing roll. A sealing strip extends transversely over and close to the inner side of the endless porous belt in the region where web and belt are traveling off the cylinder. For deflecting the air boundary layer which arrives together with the belt, a sealing support beam also extends transversely over the inner side of the belt and supports the sealing strip. The beam, the sealing strip, the reversing roll and a section of the belt which is tangential to the cylinder and the reversing roll together define an area of negative pressure.
摘要:
A dryer section of a paper making machine is divided into several dryer groups, each comprising a plurality of dryer cylinders, a plurality of reversing rolls between neighboring cylinders and a respective web supporting belt wrapping around the cylinders of a dryer group. Within each dryer group, the web travels, in continuous contact with the supporting belt, alternately over the dryer cylinders and the reversing rolls so that the web comes into direct contact with the cylinders and the supporting belt comes into direct contact with the reversing rolls. The cylinders are arranged in several rows which are inclined to the vertical, alternately rearwardly and forwardly defining V-shaped double rows. The end of each row and the starting point of the following row are formed by two cylinders arranged horizontally alongside of each other. The rows of dryer cylinders succeed each other in the manner of a zig-zag line. Each inclined row comprises about three cylinders.
摘要:
The invention relates to a device for supplying a respiratory gas, in particular a CPAP device and also to an air-conduction structure that is provided in said device. The aim of the invention is to provide a device of this type for supplying a respiratory gas, which is characterised by a silent operation and which has advantages in terms of the assembly method and of hygiene over conventional devices of this type. This is achieved by a device for supplying a respiratory gas, comprising a transport unit for transporting said gas at a pressure level that exceeds the ambient pressure, a housing for receiving the transport device and an air-conduction structure for guiding the respiratory gas from the transport device to an outlet region, said air-conduction device being configured by a moulded foam part comprising respiratory-gas channels. This enables the provision of a respiratory-gas supply device, in particular a CPAP device, in which the air-conduction device is formed by a sound absorbing, interchangeable foam element, or a foam element that can be washed separately.
摘要:
The invention concerns an apparatus for supplying a respiratory gas, a humidifying apparatus, a respiratory gas tube and a connecting apparatus therefor. The apparatus of the invention includes a blowing device for delivering the respiratory gas, a housing device which has a bottom region, a top surface region and a side region extending upwardly between the top surface region and the cover region, as well as a connecting device for connecting a humidifying apparatus for humidifying the respiratory gas, wherein the connecting device is arranged in the side region of the apparatus in such a way that the humidifying apparatus can be laterally coupled thereto. The humidifying apparatus according to the invention is distinguished by a partial amount discharge device for passing a partial amount of the liquid pre-stored in a liquid storage space into a humidifying region. The respiration tube according to the invention includes a connecting plug structure which has both a respiratory gas connecting portion and also a pressure measuring tube connecting portion.