Abstract: The steam generator has a combustion chamber for fossil fuel. A vertical gas flue is arranged downstream of the combustion chamber on a heating-gas side and connected via a horizontal gas flue. The structure requires especially little outlay in terms of manufacture and installation. The combustion chamber has a number of burners which are disposed at the same level with the horizontal gas flue.

Abstract: The fossil fuel fired continuous-flow steam generator has a gas turbine combustion chamber for fossil combustibles. On the heating gas side a vertical gas extractor is mounted downstream of a horizontal gas extractor. The walls surrounding the combustion chamber are composed of vertical evaporator tubes that are welded together. During operation the temperature differences between adjacent evaporator tubes of the combustion chamber are kept as low as possible. The burners are arranged at the level of the horizontal gas extractor. For a number of evaporator tubes which can be simultaneously impinged by the flow medium the ratio of the steam generating capacity M (in kg/s) at full load and of the sum A (in m2) of the inner cross-sectional surfaces of the same evaporator tubes is less than 1350 (in kg/sm2).

Abstract: A steam generator has an especially simple structural concept of a combustion chamber for a predetermined output range and for various qualities of different fossil fuels. The steam generator includes a first combustion chamber and a second combustion chamber which have a respective number of burners for fossil fuel and are constructed for an approximately horizontal main flow direction of heating gas. The first combustion chamber and the second combustion chamber open into a common horizontal gas flue connected upstream of a vertical gas flue on the heating-gas side.

Abstract: A steam generator has an especially simple structural concept of a combustion chamber for a predetermined output range and for various qualities of different fossil fuels. The steam generator includes a first combustion chamber and a second combustion chamber which have a respective number of burners for fossil fuel and are constructed for an approximately horizontal main flow direction of heating gas. The first combustion chamber and the second combustion chamber open into a common horizontal gas flue connected upstream of a vertical gas flue on the heating-gas side.

Abstract: A steam generator has a combustion chamber which is configured for an approximately horizontal main direction of flow of the fuel gas and which is followed on the fuel-gas side, via a horizontal gas flue, by a vertical gas flue. The containment walls of the combustion chamber are formed from evaporator tubes. Temperature differences between adjacent evaporator tubes of the combustion chamber are to be kept particularly low in all the load states of the steam generator. For this purpose, a first group and a second group of evaporator tubes can be acted upon in each case in parallel by a flow medium. The first group of evaporator tubes is connected in series with the second group.

Abstract: The fossil fuel fired continuous-flow steam generator has a gas turbine combustion chamber for fossil combustibles. On the heating gas side a vertical gas extractor is mounted downstream of a horizontal gas extractor. The walls surrounding the combustion chamber are composed of vertical evaporator tubes that are welded together. During operation the temperature differences between adjacent evaporator tubes of the combustion chamber are kept as low as possible. The burners are arranged at the level of the horizontal gas extractor.

Abstract: A steam generator which is both suitable for a horizontal mode of construction and offers the advantages of a continuous steam generator. According to the invention, a steam generator has at least one continuous heating surface disposed in a duct where hot gas circulates in a substantially horizontal direction. The heating surface consists of a plurality of parallel and almost vertical pipes which are used to circulate a fluid, and is configured in such a way that the fluid circulating in a tube heated to a greater temperature than the following tube of the same continuous heating surface has a higher flow rate than the fluid circulating in the following tube.

Abstract: A method for monitoring a feed-water supply to a continuous-flow or once-through steam generator, wherein steam temperature of evaporated feedwater is employed for determining a feedwater supply rate in the method, includes indicating an actual value of the steam temperature jointly with a setpoint value thereof obtained from operationally induced parameters, and a device for performing the method.

Abstract: A continuous-flow steam generator includes a combustion chamber having a number of burners for a fossil fuel and a gas-tight containment wall formed from at least approximately vertically disposed evaporator tubes through which a flow passes upwards from below on the feed-water side. A method and a system for starting up the continuous-flow steam generator avoid start-up losses by setting a water level in the evaporator tubes and a ratio of the fuel stream to the feedwater stream in such a way that the water evaporates completely during passage through the evaporator tubes, so that water is no longer present at the evaporator outlet. A start-up system having a setting device for setting the water level in the evaporator and for setting the ratio of the fuel stream to the feed-water stream, is used for this purpose.

Abstract: A continuous-flow steam generator includes a combustion chamber of rectangular cross-section and combustion-chamber walls each having essentially vertically disposed evaporator tubes through which a flow medium can flow from the bottom towards the top. The tubes are connected to one another in a gas-tight manner by tube webs. In order to equalize a differing supply of heat into the evaporator tubes, a heat-absorbing surface formed from an individual evaporator tube and from the tube web assigned to that tube is smaller in the case of evaporator tubes in a middle region of the combustion-chamber wall than at a corner of the combustion chamber.

Abstract: A continuous-flow steam generator has a combustion chamber with a number of burners for fossil fuel. A gas-tight containing wall is formed from approximately vertical evaporator tubes, through which a medium passes from the bottom upwards. A start-up process is maximized with regard to the reduction in start-up losses. The evaporator throughput is set in proportion to the firing heat capacity in the combustion chamber. A control device has a control module for setting the quantity of medium supplied to the evaporator per unit time, in dependence on the fuel quantity supplied to the burner or each burner per unit time.

Abstract: A centrifugal pump system for moving hot media includes a pump section, a motor section and mounting elements holding the pump and motor sections together. A force is formed by the mounting elements that is transmitted between the pump section and the motor section. A heat barrier is positioned between the pump section and the motor section. The heat barrier includes an insulating ceramic element. The force transmitted between the pump section and the motor section is transferred through the ceramic element.

Abstract: A compatibilized thermoplastic molding composition containing polyurethane and polyolefin resins is disclosed. Accordingly, a particularly structured copolymer having a number average molecular weight of about 25,000 to 350,000 and containing blocks of monoalkylene arene and either hydrogenated conjugated diene or non-hydrogenated conjugated diene, was found to compatibilize the composition. Articles molded from the composition are characterized by their good mechanical properties.

Abstract: A forced once-through steam generator with an evaporator heating surface has a control device for a furnace which is controlled by a setpoint value L assigned to the steam generator power and a control device for a feed-water mass flow M into the evaporator heating surface. In order to avoid an overshoot of a specific enthalpy at an outlet of the evaporator heating surface, a device is superimposed on the feedwater control device which serves to derive a variable Q(L1)/,[h.sub.sA (L2)-h.sub.iE) as a setpoint value M.sub.s for the feed-water mass flow. In this case h.sub.iE is the specific enthalpy at an inlet of the evaporator heating surface, Q(L1) is a value derived by a first power value L1 from a function generator for a heat flow into the evaporator heating surface and h.sub.sA (L2) is a setpoint value derived by a second power value L2 from the function generator for the specific enthalpy at the outlet of the evaporator heating surface.

Abstract: A substantially linear poly-vinylarene/polyurethane block copolymer prepared by reacting (1) a difunctional poly-vinylarene which is produced by anionic polymerization and which contains isocyanate-reactive groups, (2) a diisocyanate or an isocyanate prepolymer, and (3) a diol having a high molecular weight or a chain extender having a lower molecular weight, is disclosed to be suitable for the preparation of shaped articles, coatings, coupling agents and compatibilizers.

Abstract: The present invention directed to an at least substantially pore-free polyurethane prepared by reacting at least one polyisocyanate and a component containing a partial carboxylic acid ester which is the reaction product of a carboxylic acid and an at least trihydric alcohol in quantities such that at least one of the hydroxyl groups of said alcohol is not esterified.

Abstract: This invention relates to a process for the preparation of foundry cores and molds by mixing a filler and a casting resin mixture and then curing the resultant mixture. The casting resin mixture is made from (a) 25 to 99.9% of at least one organic polyisocyanate, (b) 0.1 to 50% of at least one organic compound containing at least two epoxide groups, and (c) up to 50% of a polyhydroxyl compound, the quantities being based on the total quantity of resin.

Abstract: This invention relates to thermosetting compositions for the production of epoxide networks of very high impact strength, to a process for their preparation and to their use as polymer materials, coating compounds, adhesives and materials for electrical insulation.

Abstract: It is now possible to provide reaction resin mixtures based on organic polyisocyanates and organic polyepoxides that can be hot-cured to high-quality plastics having isocyanurate and oxazolidinone groups that are largely storage-stable at room temperature, without their curing having to be stopped at any time, so that the systems exist in an intermediate "B-stage" (i.e., in a state that is solid at ambient or moderately elevated temperature but still fusible), so that at any later time, for example after pulverizing or dissolving in a suitable solvent, they can be converted by shaping and further thermal action to their ultimate, crosslinked and no longer fusible final state.

Abstract: Reactive systems comprising of a specific polyisocyanate component and a reactive component for this polyisocyanate component, as well as non-reactive plasticizers and if appropriate other auxiliaries and additives, and a process for the preparation of polyurethane plastics containing isocyanurate groups using this reactive system.