摘要:
For the purpose of transferring a leader of a web-formed material (1) from a first treatment step to a subsequent second treatment step, the web-formed material (1) is divided by forming a strip (1a) in one edge portion of the web-formed material. The strip (1a) is passed in between two sharp edges (5a,6a) located close to each other, such that the two sharp edges (5a,6a) embrace the strip like a pair of shears. Thereafter, one of the sharp edges (6a) is moved towards the other (5a) so that said one edge (6a) passes said other edge (5a), hence cutting off the strip. With the same movement, the leader is given an impulse, in a direction essentially perpendicular to the strip (1a), towards a leader conveyor (7,8) which intercepts the leader and passes it into the second treatment step.
摘要:
A method and a device for removing broke, after a web break or the like, in a plant (1) enclosed in a housing (2), for drying of a web-formed material (12), comprising blow boxes arranged in a plurality of drying decks. The web-formed material (12) changes its machine direction between the drying decks, when passing over turning rolls (4), which during normal operation are running freely but which during, for example, threading are driven, against which the web-formed material (12) is pressed by the tension in the web only. An opening (3a) is made in the wall (2a) of the housing (2), such that at least one turning roll (4) becomes accessible, and a press roller, a press wheel, or the like, (5) is applied such that the web-formed material (12) is pressed against this turning roll (4). Thereafter, the web-formed material (12) is fed forward by running the drive system of the turning rolls (4) at a low speed, and the web-formed material (12) is fed out of the housing (2) through the opening (3a).
摘要:
The invention relates to a method for drying salts with a water of crystallisation content in convective apparatuses that can additionally be indirectly heated. The invention is primarily characterised in that the drying process takes place with a moisture content of the drying gas above a determined level. The gas surrounding the salt particles during the drying process therefore has a specific humidity. In this way, the rate of drying is positively influenced.
摘要:
The invention refers to a device to create a hermetic seal for large openings in equipment subject to low pressure. According to the invention it is characterised by at least one sealing cover being provided, which is pressed onto the side wall of the equipment by means of bolts, where the bolts are welded to a strip attached to the side wall at the edge of the opening in the equipment. This provides a good, low-cost and hermetic seal.
摘要:
A reactor for the treatment of lignocellulosic material and related methods. The reactor includes a vessel having an upper portion and a lower portion. A pressure envelope is formed between an outer wall of the vessel and at least one lower wall of the lower portion of the vessel, and the upper portion of the vessel and the pressure envelope are operatively connected with a pressurization line, such that a pressure of the pressure envelope and a pressure of the upper portion may be equalized.