Abstract: A thermal machine including a wall defining a hot gas duct for transferring a hot gas stream and a cooling jacket disposed at a distance from the wall on an outside of the hot gas duct so as to define a cooling duct with an inlet and an outlet. The cooling duct is configured to conduct a cooling medium along an external face of the wall from the inlet to an outlet in a direction counter to a flow of hot gas in the hot gas duct. An impingement cooling plate is disposed at the inlet of the cooling duct and includes cooling baffle holes configured such that cooling medium entering the cooling duct through the cooling baffle holes flows in a direction perpendicular to the wall. The impingement cooling plate is positioned such that an inflow-side edge sealingly abuts the wall of the hot gas duct so as to reduce a transverse flow of the cooling medium through the cooling duct.

Abstract: The proposed invention relates to a method and a system for the removal of heat stable amine salts from an amine absorbent used in a carbon dioxide (CO2) capture process, the method comprising: withdrawing amine absorbent containing heat stable amine salts from the CO2 capture process; subjecting the withdrawn amine absorbent containing heat stable amine salts to a residual CO2 removal step; subjecting the amine absorbent from the residual CO2 removal step to a separation step to separate heat stable amine salts from the amine absorbent; and returning the amine absorbent having a reduced concentration of heat stable amine salts to the CO2 capture process.

Abstract: The invention relates to method and device for generating and publishing a railway signaling diagram comprising a track diagram of a railway network and track equipment arranged on the network portion, each piece of track equipment comprising particular characteristics. One method of the invention comprises: (a) entry by a user of topological data of the portion of the railway network; (b) automatic generation by the computation means of a track diagram of the portion of the railway network from topological data; (c) selection by the user of a plurality of rules for positioning track equipment to be arranged on the railway track diagram, and (d) automatic generation by the computation means of the railway signaling diagram of the portion of the network from selected rules for positioning the track equipment and the railway diagram. The invention also relates to a device adapted to carry out the preceding method.

Abstract: In a method for reducing lime consumption in DFGD systems, a slaker is provided wherein lime and water is introduced to produce a slaked lime slurry. The slurry is introduced into a spray dryer wherein the slurry is atomized. A flue gas stream is also introduced into the spray dryer and reacts with the atomized slurry, causing calcium sulfate and sulfite, as well as unreacted lime particulate to form. A portion of the particulate is filtered and sent back in a substantially dry form to the slaker to form part of the slurry.

Abstract: A method and a system for controlling dust particle emissions from an electrostatic precipitator (1), which has a first and a second bus-section (16, 20), are provided. Dust particle emissions are controlled by observing that a rapping event of the first bus-section (16) is about to be initiated, verifying, before allowing the rapping event of the first bus-section (16) to be initiated, that the second bus-section (20) is ready to receive the dust particles to be released during the rapping event of the first bus-section (16), and then initiating, after verification, the rapping event of the first bus-section (16).

Abstract: A selective catalytic reduction reactor (8), which comprises at least one catalyst layer (14), is operative for removing NOx from a flow of process gas of a process plant, such as a combustion plant or an incineration plant. A device for controlling the feeding of a reducing agent, such as urea or ammonia, to said at least one catalyst layer (14), which has an attack area (A) facing the flow (P) of process gas, comprises at least one supply nozzle (32) which is operative for supplying reducing agent in at least one supply area (34) which corresponds to a part of the attack area (A), and a moving device (36) which is operative for moving said supply area (34) over the attack area (A).

Abstract: An outer shroud for a solid fuel nozzle tip includes: an top shell portion and a bottom shell portion, each portion fabricated from a preform produced from a single sheet of flat stock and each shell portion including a forward area and a backward area and outlet sidewalls, wherein a right outlet sidewall and a left outlet sidewall are each separated from the forward area by a rounded corner; and a left inlet sidewall and a right inlet sidewall coupled to the top shell portion and the bottom shell portion.

Abstract: The present disclosure relates to a fabric filter system, which may be used for removing particulate matter from a gas, such as a combustion process gas. The filter system includes a fabric filter (3) which is placed in a filter compartment. From the filter, gas flows via a filter plenary space (5) to an outlet duct (7), where the gas exits. A flow control device controls the amount of air exiting through the outlet duct. The flow control device comprises a louver-type damper (17). This provides reliable and efficient control of the gas flow. A collar (21), connecting the plenary space (5) with the outlet duct (7), improves the gas flow into the duct.

Abstract: A power plant is provided including a steam power plant and/or a combined cycle power plant. A water steam cycle of the plant includes two steam turbine arrangements; the first turbine arrangement includes steam turbines with at least two pressure levels and a second turbine arrangement having at least one back pressure turbine configured to expand steam to the supply pressure of a CO2 capture system. A method for operating the plant includes operating the first steam turbine arrangement to produce power during all steady state operating points of the steam cycle and at least a part of the second steam turbine arrangement is bypassed to the system and/or is operated to produce power and to release low-pressure steam to the system when the system is in operation. Both steam turbine arrangements are operated using all available steam to produce power when the system is not in operation.

Abstract: A turbomachine component includes a basic component including a first outer wall having a first joint face. An additional part includes a second outer wall having a second joint face, wherein the first and the second wall enclose an internal cavity, and wherein the first and the second joint faces are joined together between the basic component and the additional part. At least one wall-like intermediate piece is disposed in at least one of the basic component and the additional part and extends from the respective outer wall into the internal cavity, the at least one wall-like intermediate piece including a cutout having a transition contour that deviates from a straight line and is disposed at at least one transition between the at least one wall-like intermediate piece and the outer wall so as to relieve at least one of a mechanical and a thermal stress.

Abstract: A method and apparatus are disclosed for mixing H2-rich fuels with air in a gas turbine combustion system, wherein a first stream of burner air and a second stream of a H2-rich fuel are provided. All of the fuel is premixed with a portion of the burner air to produce a pre-premixed fuel/air mixture. This pre-premixed fuel/air mixture is injected into the main burner air stream.

Abstract: Disclosed herein is a system comprising a first heat exchanger; the first heat exchanger being operative to reduce a temperature of a carbon dioxide rich flue gas stream to about ?100 to about ?60 C; an absorber; the absorber being located downstream of the first heat exchanger; wherein the absorber facilitates contact between the flue gas stream and a solvent to form a carbon dioxide rich solvent stream; the solvent being operative to selectively absorb carbon dioxide over other gases present in the flue gas stream; and a valve; the valve being located downstream of the absorber; the valve being operative to reduce a pressure on the carbon dioxide rich solvent stream to produce carbon dioxide and a lean carbon dioxide solvent stream.

Abstract: A turbine diaphragm includes an annulus of static blades and an outer diaphragm ring surrounding the annulus of static blades and welded to the outer platforms. Each static blade has an inner platform, an aerofoil, and an outer platform. The inner platforms serve the function of an inner diaphragm ring, thereby reducing material and manufacturing costs. Furthermore, confronting edges of the inner platforms have an interference fit with each other and the aerofoils are in a state of torsional stress between the inner and outer platforms. The latter two features improve the dynamic characteristics of the diaphragm.

Abstract: A method is provided for operating a power plant, having a waste heat-generating gas turbine unit and also rooms which are to be air conditioned. Waste heat, which is discharged directly to the outside of the gas turbine unit, is used for heating the rooms which are to be air conditioned. A gas turbine for carrying out the method is also provided.

Abstract: A relay for current differential protection of a transmission line, comprising: a first calculator of symmetrical sequence components of currents of each phase of the transmission line at local and remote ends of the transmission line; a second calculator of phase differences ?12 and ?012 between combinations currents i12 and i012 of the symmetrical sequence currents; a fuzzy inference system which outputs a variable y whose value is calculated according to the values of the phase differences ?12 and ?012; a third calculator which outputs a tripping signal for the control of a circuit breaker arranged on the transmission line and associated with the relay, the value of the tripping signal being calculated according to the values of the variable y and the values of the currents of each phase at the local and remote ends of the protected transmission line.

Abstract: A single shaft steam turbine plant is disclosed with a first and a second low pressure steam turbine located at either end of the shaft. A generator and at least one high-pressure steam turbine are located on the shaft between low pressure steam turbines.

Abstract: A method for manufacturing a rotor by welding a plurality of elements together is described. The elements have a body with cavities and surfaces to be welded to surfaces of adjacent elements. According to the method, the elements are vertically stacked one above the other to form a pile with facing surfaces to be welded together defining slots. The cavities of adjacent elements define bores that extend within the pile. Then, adjacent elements are welded together within the slots. The bore is purged with an inert gas or mixture during welding. The slots are welded at an upper part of the bore before the slots at a lower part of the bore, and a slot at the upper part of the bore is welded last.

Abstract: A rotor blade for fastening on the rotor of a turbomachine, especially of a compressor of a gas turbine, has a blade airfoil and a blade root (15) which adjoins the lower end of the blade airfoil and extends along a blade axis and by which the rotor blade, in an encompassing slot which is arranged on the outer periphery of the rotor, is retained between two spacers (12, 18) which follow each other in the circumferential direction and which in their turn are retained in the slot. The blade root (15) is formed with a T-shape in cross section and includes circumferential shoulders (16, 16?) which fit under the adjacent spacers (12, 18), and the spacers (12, 18), in the direction of the blade axis, engage by retaining surfaces (20) in undercuts (24) in the slot.

Abstract: A valve assembly includes a valve seat having a valve opening therein. A valve plate is configured to sealingly engage the valve seat in a closed position for closing the valve opening to thereby close a fluid path through the valve assembly, the valve plate being biased toward the closed position by a first spring. An actuator plate can include an inlet opening therein, the actuator plate being biased in a direction away from the valve plate by a second spring. A member includes a first end fixed to the actuator plate, an interior passage in communication with the inlet opening in the actuator plate, and a second end engageable with the valve plate when a portion of the member passes through the valve opening of the valve seat, wherein the valve plate is configured to open in response to direct fluid pressure when fluid is guided to the valve plate by the member or when fluid pressure on the actuator plate is transmitted to the valve plate via the member.

Abstract: A method and apparatus for the operation of a gas turbine unit with an evaporative intake air cooling system in the intake air pathway, wherein the return water flow of the evaporative intake air cooling system is used for the cooling of components of the gas turbine unit and/or of a generator coupled to the gas turbine unit and/or of another element coupled to the gas turbine unit, and a gas turbine unit adapted to be operated using this method.