Abstract: The present invention pertains to a synthesis gas heat exchanger unit with one synthesis gas radiant cooler (1), two synthesis gas convection coolers (23), one crude gas-clean gas heat exchanger (4), one crude gas-inert gas heat exchanger (5), and one dust separator (11). These devices are preferably arranged vertically or slopingly. The crude gas heat exchangers (4, 5, 23) are designed as single-flue, double-flue or multiple-flue heat exchangers. They are elastically supported via claws (10) and are equipped with an electric heater (9). A soot blower system (13) is associated with each flue (4.1, 4.2) as well as (5.1, 5.2) and right hand flue and left hand flue (23.1, 23.2) at the crude gas inlet. Soot blowers (31) are likewise provided on the connection lines (2, 6), and mass flow controllers (7) are provided in the lower connection lines (6).

Abstract: A refractory lining in the transition section of a gasifier to the waste heat boiler with claws/brackets for supporting refractory shaped bricks. Each claw is suspended on hooks in a pipe branch and is protected from overheating by cooling tubes. The refractory lining is supported in the tube bundle by brackets, which are arranged one on top of another and are welded to webs tube-web-tube welding of the tube bundle. The lower bracket at the cooling tube bundle and the horizontal tube wall are protected against clogging with slag by a refractory mass with a drip nose. Expansion joints are provided between the shaped brick segments under the brackets, whereas ring-shaped fiberboard segments are inserted above the claw.

Abstract: A process for repairing heat exchanger tubes by partial tube replacement in the inside of closed tube apparatus with at least one cylindrical tube bottom from the tube side, wherein dents observed are first straightened, and a damaged partial tube section is separated and removed. A new partial tube section is then pushed in through a hole in the tube bottom. The joining of the new partial tube to the heat exchanger tube remaining inside the heat exchanger is performed by inner tube welding by means of an inner tube welding device, which is fastened to a bracket and a drive and is introduced through the new partial tube. Tests are performed after the welding together of the partial tube and the heat exchanger tube to demonstrate the quality.

Abstract: A heat-insulating lining on heat exchanger surfaces for reducing the heat flow at the cooling surfaces of a medium- or high-pressure heat exchanger, which comprises a tube-web-tube wall. Corrosion resistant fastening pins are arranged in a weld area on the webs of the cooling surface. A ceramic fiber material is arranged as a heatinsulating material on both sides of the webs up to the level of the outside of the tubes of the tube wall, and segments of a ceramic moleskin mat, which are held by fastening pins and fastening washers, are arranged above it on both sides. An expanded metal, which is protected by a refractory material with good corrosion resistance, is additionally arranged at one or both edge zones and at the locations of the joints of the moleskin mat segments.

Abstract: A process and a device for quickly switching over from the premixing operation to the diffusion operation in combustion chambers of a gas turbine upon the extinction of the premixing flame or upon the occurrence of a disturbance that may lead to the extinction of the premixing flame. A pilot gas line, into which a pilot gas control valve is inserted, branches off from the fuel gas supply line before the fuel gas valve. The fuel gas supply line branches into fuel supply lines for both combustion chambers after the fuel gas control valve with displacement measurement. The fuel supply to the diffusion gas line and to the premixing gas line is controlled by installing a quick switch-over valve each with servo valves in the branching fuel supply lines. The combustion chambers are monitored in the area of the flame tube by pressure-measuring devices and by an optical flame-monitoring device.

Abstract: The present invention concerns a motor for generating torques around more than one axis with respect to an object that can be rotated and revolved around only one point. Only one mechanism is necessary to maintain a prescribed position or to produce changes in position around one or more axes (X, Y, or Z).The permanent-magnet excited synchronous machine comprises stator shells (10 & 10.1), multiple-phase windings (11 & 11.1), and a rotor (12) with permanent magnets (13 & 13.1), whereby the annular and spherical surfaces (14) of the rotor are more extensive than the annular and spherical surfaces (15) of the shells.All the spherical surfaces share the same center (M) of curvature, which simultaneously constitutes the origin of the coordinate systems, and the center of rotation. The shaft (17) is supported only at the center of curvature and such as to ensure freedom of motion throughout the reference coordinate system (21).

Abstract: A melting vessel plant, in which the melting vessel is a converter vessel, to which a vessel cover with a pipe connection for removing the flue gases is attached. Either an oxygen lance with an auxiliary cover or electrodes with an auxiliary cover are introduced into the melting vessel through the vessel cover. The spherical melting vessel is lined with a lining. It is arranged on running rails as a traveling melting vessel, and it is mounted on an inner running rim and an outer running rim. The melting vessel is fastened to the inner running rim by support elements arranged on the circumference. Both running rims are interlocked by shear wedges. With the melting vessel locked, a cable winch with traction cables makes possible the tilting movements of the melting vessel both in the direction of steel tapping on the running rails and back into the upright position.

Abstract: A heat insulation and corrosion protection of the inner vessel wall of a heat exchanger in a synthesis gas cooler. The heat insulation and corrosion protection are arranged above a thermal seal fastened between the vessel wall and the cooling tubes. The insulation and protection includes segments of fiber-filled plates, which are fastened to the vessel wall by means of a substructure and an adhesive or foam material. Support rings with a heat insulation protection means absorb the vertical forces. A metallic corrosion protection layer is applied to the inner vessel wall under the thermal seal. Free breathing of the vessel wall is possible and pressure equalization between the gas space and the annular space is guaranteed due to the heat insulation and corrosion protection according to the present invention.

Abstract: A process and a device for avoiding regulator instabilities in surge limit regulators for protecting a turbocompressor from surging if a high proportional gain is selected for the surge limit regulator by a blow-off via a blow-off valve. The control of the velocity of closing of the blow-off valve over time is performed by a gradient limiter of asymmetric design, wherein no velocity limitation acts in the opening direction, but a freely parameterizable velocity limitation of the closing process of the blow-off valve is provided in the closing direction. The gradient limiter is inserted between the surge limit regulator, which receives the control signals on the actual value of flow and the desired value of flow from a subtracter, and the control line for a pneumatic or hydraulic operating device of the blow-off valve.

Abstract: A process and to a device for protecting a turbocompressor from operating in the unstable working range by means of a blow-off device, wherein a control parameter is determined from measured values for the compressor flow, the compressor final pressure and the temperature measurement, as well as from preset or presettable desired values, and controlled opening of the blow-off fittings is performed by a pump surge limiter by means of a pneumatic actuating device each on the basis of the said control parameter. The measured values for the temperature, flow and pressure entered into the pump surge limiter are coupled with a dynamic blow-off line. The blow-off fittings are operated in sequence, and the control signals for the quick opening of the blow-off fittings are first sent to a small blow-off fitting, and then to a large blow-off fitting after the opening of the small blow-off fitting. In cooperation with the dynamic blow-off line, the pump surge limiter provides for continuous control, i.e.

Abstract: A device for assembling and laying track support bridge sections displaceable at right angles to their longitudinal axis, with launching support structures, which are arranged between the track supports and are likewise transversely displaceable, into a bridge support structure. The device includes a base frame with a plurality of telescoping props, base frame being built up on a vehicle. A laying arm is provided pivotable around a horizontal axis at one end of the base frame. A front arm is provided pivotable around a horizontal axis at another end of the base frame. Both the laying arm and the front arm are adjustable by hydraulic cylinders. A displacing device is provided for pushing the bridge sections apart and together. The displacement device includes track support and launching support sections arranged between the front arm and the laying arm on the base frame in a transverse direction in relation to the base frame.

Abstract: Plate coolers including a plate cooler made of copper or a low-alloy copper alloy for shaft furnaces, especially blast furnaces, with blind holes arranged in the cooling body for passing through cooling water, as well as with vertical side flanges arranged around the cooling body and with horizontal side flanges. The plate cooler can be connected to another plate cooler to form a plate cooler segment or plate cooler ring. Webs and grooves located between them are arranged in the plate cooler in the area of the cooling body on a side facing the interior of the furnace for holding refractory material.

Abstract: A device for transporting molten metal in the pouring bay of a blast furnace and a process for operating this device. At least one main runner with skimmer, which main runner is installed after the tapping door of the blast furnace, is provided as well as runoff gutters arranged downstream with a transfer station into the molten metal transfer cars. A pipe section with connecting branches, which is followed by a second pipe section with a slide, is flanged to the runout in a gas-tight manner. This second pipe section is also connected in a gas-tight manner to the intake opening of the main runner. A T-shaped pipe section, which allows the pig iron to flow into one of the pig iron transfer cars, is arranged at the end of the pipe sections. To keep clear the open cross section of the wear lining of the pipe section, inert gas is blown in, which also keeps the ceramic plate of the sliding shutter clear.

Abstract: The present invention concerns a slab (1) for cooling a blast furnace and made of a mass of copper or high-copper alloy forged or rolled into a blank.The edges of the slab accommodate narrower vertical and horizontal part-way bores (13 & 14) disposed around vertical part-way bores (3).Coolant is supplied to and removed from the narrower bores through sections (5 & 5') of pipe and to and from the other bores though connections (2 & 2').The slab can be additionally secured to the furnace's armor by way of a cutout (12) in the surface facing away from the interior of the furnace and engaged by a bolt mounted on the armor. The slab is secured to the furnace by fasteners that engage threaded bores (9) in the slab.

Abstract: A pivoting transfer means for a jet of bulk material between a first cover belt conveyor and a second cover belt conveyor. The bulk material leaves the cover belt conveyor in the area of the tail pulleys and enters the receiving mouth of a second cover belt conveyor as a free jet of bulk material. Both cover belt conveyors are arranged pivotably in relation to one another around a pivot axis. The receiving mouth of the cover belt conveyor is limited by the bottom belt, the cover belt and the side walls. The jet of bulk material is deflected from the vertical into the horizontal direction of delivery within the receiving mouth. The first belt conveyor may be arranged at a higher level with the second cover belt conveyor arranged thereunder. However, the second cover belt conveyor may also be arranged at a higher level with the first cover belt conveyor arranged thereunder wherein the transfer is still from the first cover belt conveyor to the second cover belt conveyor.

Abstract: A spiral housing with a spiral cross-section for a turbomachine, in which a disk diffuser with an upstream annular disk space is asymmetrical to the spiral cross-section. This spiral cross-section has a base circle of substantially constant diameter. The spiral cross-section also has a tongue region and a region adjacent to the tongue with circular spiral cross-sections extending to where an outside diameter of the spiral cross-section equals a specific diameter and the circular spiral cross-sections continue thereafter to increase in cross-section only axially.

Abstract: An armored bridge-laying vehicle with a laying device for bridges or bridge sections located one on top of another, wherein a single laying girder is rotatably mounted on a support ring structure on the tower ring. The laying girder is pivotable around a horizontal pivot bearing, and the pivoting is performed by a piston-and-cylinder unit. Telescopic U-shaped girders are arranged inside the laying girder, and the top edges are located in the same plane as the upper chord edges of the laying girder. The bridge elements are laid by a flanged feeding unit, support rollers and a pivotable arm in the rear of the laying girder.

Abstract: A multiple-stage hydraulic cylinder for shifting loads by exerting different forces over different distances, in which a hollow-piston cylinder is provided with a hollow piston rod. The hollow piston rod accommodates at least one additional long-stroke cylinder. The hollow piston rod, moreover, comprising a cylinder tube surrounding the long-stroke cylinder. Connections are provided for hydraulic fluid to move the cylinders. These connections are provided on the hollow piston rod and the long-stroke cylinder for admitting fluid to move the hollow-piston cylinder and the long-stroke cylinder.

Abstract: A geared multishaft turbocompressor with impellers arranged in series in terms of flow, which are fastened to two or more pinion shafts, which are arranged in parallel to one another and are driven directly via a central gear or indirectly via pinion shafts on the circumference of the central gear. Two or more compressor impellers are arranged in the same direction of flow in the area of the high-pressure stages III and IV on a pinion shaft. An intercooler is arranged between an intermediate outlet housing and an intermediate inlet nozzle. In stage III, the gas enters the impeller through the inlet nozzle, and it leaves the compressor via an intermediate outlet housing. After intercooling, the gas again enters stage IV via the inlet nozzle, and it leaves this stage via the outlet housing after flowing through the second impeller. An analogous arrangement of the stages Ia, IIa, IIIa is used in the radial expander, with opposite direction of the gas flow.

Abstract: A rotary compressor with enmeshment between a helically geared male rotor and a helically geared female rotor. The bearing housings on the drive side (3) and the pressure side (15) have spigots (14) which protrude into the bores inside of the rotors (12, 12a). The rotors (12, 12a) are mounted on the drive side in plain bearings (6, 22) as well as in radial bearings (9, 21) and are anchored with securing elements by means of shaft nuts (10, 19). On the mounting on the pressure side (15) radial bearings (16, 17) are used to mount the rotors (12, 12a). A torsion shaft (4) for the clutch half of the compressor drive (1) is guided through a bore on the drive side in the bearing housing (3) and in one of the four spigots (14). The torsion shaft (4), furthermore, could be coupled with the rotor (12) at the pressure side of the bearing housing (15).