Abstract: A single-screw extruder for changing a morphology of superabsorbent polymer gel. The single-screw extruder has an input aperture, a channel, a screw and an output aperture. The screw in the invention has a first pitch value of a pitch of the screw flights along the conveying zone of the channel and, following in conveying direction, has a second pitch value of the pitch of the screw flights along the conveying zone of the channel, where the second pitch value is smaller than the first pitch value.

Abstract: A single-screw extruder for changing a morphology of a superabsorbent polymer, specifically a polymer gel. The single-screw extruder has an input aperture, a channel, a screw and an output aperture. The screw has a pitch value of a pitch of the screw flights along the conveying zone of the channel, where the channel has a mixing-element arrangement with at least one mixing element which protrudes into the channel of the single-screw extruder and which is configured for the mixing of the SAP polymer gel.

Abstract: A burst protection device is provided for a radial turbocharger having a turbine housing completely enclosing a turbine wheel rotatably arranged in the turbine housing, and turbine housing inner wall. The burst protection device is annularly arranged in the radial turbocharger about a central axis (A) in a circumferential direction on the turbine housing inner wall, so as to at least partly engage about the turbine wheel. The burst protection device defines at least one recess/hollow space. The at least one recess/hollow space is configured such that kinetic energy of fragments of the turbine wheel produced upon bursting of the turbine wheel is absorbed by the burst protection device based on plastic deformation of the at least one recess/hollow space, a first one of the at least one recess/hollow space being unilaterally open in a direction of the turbine housing.

Abstract: A single-screw extruder for changing a morphology of superabsorbent polymer gel. The single-screw extruder has an input aperture, a channel, a screw and an output aperture. The screw in the invention has a first pitch value of a pitch of the screw flights along the conveying zone of the channel and, following in conveying direction, has a second pitch value of the pitch of the screw flights along the conveying zone of the channel, where the second pitch value is smaller than the first pitch value.

Abstract: A single-screw extruder for changing a morphology of a superabsorbent polymer, specifically a polymer gel. The single-screw extruder has an input aperture, a channel, a screw and an output aperture. The screw has a pitch value of a pitch of the screw flights along the conveying zone of the channel, where the channel has a mixing-element arrangement with at least one mixing element which protrudes into the channel of the single-screw extruder and which is configured for the mixing of the SAP polymer gel.

Abstract: A process for producing water-absorbing polymer particles is provided, comprising a) a polymerization step in which an aqueous monomer solution comprising at least one ethylenically unsaturated monomer M which bears acid groups and may have been at least partly neutralized and at least one crosslinker is polymerized to obtain an aqueous polymer gel; b) a pelletization step in which the aqueous polymer gel having a solids content of 35 to 70% by weight and a temperature of 75 to 125° C. is forced from a high-pressure zone through a die plate into a low-pressure zone and pellets are obtained, the pressure differential between the high-pressure zone and the low-pressure zone being 4 to less than 14 bar and the orifice ratio of the die plate being 30 to 80%; c) a drying step in which the pellets are dried to a moisture content of less than 10% by weight; d) a grinding step and a classifying step to obtain water-absorbing polymer particles; and e) surface crosslinking of the water-absorbing polymer particles.

Abstract: A process for producing water-absorbing polymer particles having high free swell rate and high centrifuge retention capacity with simultaneously high permeability of the swollen gel bed by polymerization of an aqueous monomer solution in a polymerization reactor having at least two shafts (kneaders) which rotate in an axially parallel manner, subsequent extrusion at high temperatures and thermal surface postcrosslinking.

Abstract: A process for producing water-absorbing polymer particles is provided, comprising a) a polymerization step in which an aqueous monomer solution comprising at least one ethylenically unsaturated monomer M which bears acid groups and may have been at least partly neutralized and at least one crosslinker is polymerized to obtain an aqueous polymer gel; b) a pelletization step in which the aqueous polymer gel having a solids content of 35 to 70% by weight and a temperature of 75 to 125° C. is forced from a high-pressure zone through a die plate into a low-pressure zone and pellets are obtained, the pressure differential between the high-pressure zone and the low-pressure zone being 4 to less than 14 bar and the orifice ratio of the die plate being 30 to 80%; c) a drying step in which the pellets are dried to a moisture content of less than 10% by weight; d) a grinding step and a classifying step to obtain water-absorbing polymer particles; and e) surface crosslinking of the water-absorbing polymer particles.

Abstract: A process for producing water-absorbing polymer particles having high free swell rate and high centrifuge retention capacity with simultaneously high permeability of the swollen gel bed by polymerization of an aqueous monomer solution in a polymerization reactor having at least two shafts (kneaders) which rotate in an axially parallel manner, subsequent extrusion at high temperatures and thermal surface postcrosslinking.

Abstract: A droplet separator pack having at least two elongate lamella droplet separator profiles is described. Retaining strips that have a planar front and rear face and side faces adapted to the curved shape of the lamella droplet separator profiles are arranged between the lamella droplet separator profiles at at least one end thereof. The retaining strips include latching connection means for clipping together wherein the corresponding lamella droplet separator profiles are clipped together between adjacent retaining strips. In this manner droplet separator packs can be assembled in a simple manner at the place of installation.

Abstract: A tube for the conduction or discharge of wet flue gases subjected to a scrubbing has a helically formed guide element on an inner surface of the tube and having a plurality of turns. A film trap is provided on the inner surface of the tube between adjacent turns of the guide element.

Abstract: A process for preparing water-absorbing polymer particles, comprising polymerisation of a foamed aqueous monomer solution or suspension, drying, grinding and classification, whereas the process further comprising adjusting the amount of foaming agent in the aqueous monomer solution by admixing the aqueous monomer solution with a foaming agent of 1% to 15% by weight based on the amount of ethylenically unsaturated monomer and keeping the solution on a pressure of 6 bar to 15 bar and then expanding the solution.

Abstract: A process for producing water-absorbing polymer particles, comprising polymerization of a monomer solution or suspension, classification and drying of the resulting moist polymer gel, and comminution of the coarse fraction removed in the classification of the moist polymer gel, wherein the classification of the moist polymer gel is performed by means of a plurality of bar decks arranged in a cascade in a vibrating frame.

Abstract: A droplet separator pack having at least two elongate lamella droplet separator profiles is described. Retaining strips that have a planar front and rear face and side faces adapted to the curved shape of the lamella droplet separator profiles are arranged between the lamella droplet separator profiles at at least one end thereof. The retaining strips include latching connection means for clipping together wherein the corresponding lamella droplet separator profiles are clipped together between adjacent retaining strips. In this manner droplet separator packs can be assembled in a simple manner at the place of installation.

Abstract: A process for producing water-absorbing polymer particles, comprising polymerization of a monomer solution or suspension, classification and drying of the resulting moist polymer gel, and comminution of the coarse fraction removed in the classification of the moist polymer gel, wherein the classification of the moist polymer gel is performed by means of a plurality of bar decks arranged in a cascade in a vibrating frame.

Abstract: The invention relates to a mist eliminator system for gas scrubbers and the like. Said mist eliminator system comprises front and rear mist elimination layers in relation to the direction of the flow of gas, which layers are composed of respective rows of parallel mist elimination profiles, one layer of which being configured in the shape of a V or of an upturned V and the lateral sections of this layer extending away from the corresponding lateral sections of the other layer or extending in parallel thereto. Both mist elimination layers can be or are received on a single common carrier structure by a common lateral wall or a common supporting structure on which the lateral walls of the mist elimination layers are stationarily or detachably arranged.

Abstract: A tube for the conduction or the discharge of wet gases, especially for the conduction or discharge of flue gases subjected to a scrubbing (wet cleaning) is described. The tube has a helically formed guide element at its inner wall. The entrainment or the injection of droplets of the tube is reduced by this design. Furthermore, a guide element for the installation in such a tube is described. The tube is preferably a wet chimney.

Abstract: The invention relates to a mist eliminator system for gas scrubbers and the like. Said mist eliminator system comprises front and rear mist elimination layers in relation to the direction of the flow of gas, which layers are composed of respective rows of parallel mist elimination profiles, one layer of which being configured in the shape of a V or of an upturned V and the lateral sections of this layer extending away from the corresponding lateral sections of the other layer or extending in parallel thereto. Both mist elimination layers can be or are received on a single common carrier structure by a common lateral wall or a common supporting structure on which the lateral walls of the mist elimination layers are stationarily or detachably arranged.

Abstract: A method and a low-cost, robust and simple system for remote sensing and analyzing spectral properties of targets as a means to detect and identify them is introduced. The system can be highly portable but is usable in fixed locations or combination thereof. An aspect of the method and system includes the capability to distribute, modulate, aperture and spectrally analyze radiation emitted or absorbed by a volumetric target chemical species (solid, liquid or gas) or a target surface. Radiation is first collected by a single light gathering device, such as a lens, telescope, or mirror, and then distributed to multiple detectors through spectrally discriminating components and if desired through apertures to achieve this desired detection and identification.