Abstract: A broaching apparatus includes; a broach having a cross-section corresponding to a geometry of slot between adjacent steeples of a turbine rotor, and a mechanism which moves the broach through the slot in a direction substantially parallel to a direction of extension of the slot.

Abstract: The treatment system for a flue gas from a combustion process includes a condenser, a compressor for compressing the flue gas deprived of moisture at the condenser, a NO2 scrubber column supplied with the compressed flue gas from the compressor, a liquid supply line for supplying liquid condensed at the condenser to the NO2 scrubber column, and a liquid recirculation line for recirculating liquid from the NO2 scrubber column to the condenser.

Abstract: A head assembly 52,152 for a pulverized coal nozzle includes a turning vane 54 or a curved vane 154 disposed within a pipe elbow. The vanes 54,154 are angled relative to the inlet port and the outlet port of the pipe elbow to redirect a stream of air and pulverized solid fuel particles from the inlet port 60,160 toward the outlet port 62,162. The coal rope-breaking vane 56 is pivotable about an axis to adjust an angle of the vanes relative to a stream of air and pulverized solid fuel particles from the inlet port 60,160. An adjustment bar 66 may connect to the vanes 56 and extend outward through the pipe elbow to allow the vanes 56 to be adjusted while the pulverized solid fuel particles flow through the head assembly 52. The pipe elbow may further include inspection ports 68,168 and a removable cover 70,170. The vanes may be attached to the removable cover 70,170 thus allowing them to be easily removed and replaced.

Abstract: A head assembly 52, 152 for a pulverized coal nozzle includes removeable wear-resistant inserts having vanes 54, 151, 153. The vanes 54, 151, 153 may be flat or curved to direct a stream of air and pulverized solid fuel particles from the inlet port 60, 160 toward the outlet port 62, 162. The curved vanes 151, 153 curve in two dimensions to evenly distribute the stream of air and pulverized solid fuel away from the outer surfaces reducing wear and corrosion. The pipe elbow has a removable cover 70, 170 that allows for easy access. The vanes are attached to a wear-resistant replaceable liner 185 thus allowing them to be easily removed and replaced. The wear-resistant liner 185 may be made from several parts 187, 189 for ease of removal and replacement.

Abstract: Provided is a power plant and a method of operating thereof. The power plant includes a boiler for heating process fluids; and a multistage first steam turbine with an outlet line that passes through the boiler. The outlet line includes an extraction line that is configured and arranged to extract steam from an intermediate stage of the first steam turbine and heat at least one of the process fluids.

Abstract: Disclosed herein is a once-through evaporator comprising an inlet manifold; one or more inlet headers in fluid communication with the inlet manifold; one or more tube stacks, where each tube stack comprises one or more substantially horizontal evaporator tubes; the one or more tube stacks being in fluid communication with the one or more inlet headers; where one or more tube stacks are used for a start-up of the once-through evaporator; one or more outlet headers in fluid communication with one or more tube stacks; a separator in fluid communication with the one or more outlet headers; a first flow control device in fluid communication with the separator and at least one of the tube stacks used for startup; a second flow control device in fluid communication with a superheater to bypass the separator and at least one of the tube stacks used for startup; and a controller for controlling the actuation of the first and second flow control devices in response to a parameter of the evaporator.

Abstract: A method for operating a steam power plant at low load is suggested comprising the extraction of live steam LS before the last superheater SH3 and/or resuperheated steam before the last resuperheater RSH2 and using the thermal energy of this steam in other heat sinks. Thus, nearly constant steam parameters of the live steam LS are achieved and the overall efficiency of the steam power plant remains at a high level.

Abstract: A carbon capture system, such as a chilled ammonia process, is provided that includes with a cooling system, a carbon dioxide absorption system and an ammonia absorption system. The ammonia absorption system includes an absorber column to receive carbon dioxide lean gas stream having ammonia and to receive an absorbent, wherein the absorbent absorbs ammonia from the carbon dioxide lean gas stream to provide an ammonia reduced gas stream and an ammonia rich absorbent. Further, an ammonia stripper is provided to receive the ammonia rich absorbent and to receive a portion of the gas stream, wherein the gas stream flows through the ammonia stripper to heat the ammonia rich absorbent to release the ammonia therefrom and provide an ammonia rich gas stream and an ammonia reduced absorbent.

Abstract: A fuel cell system comprises a fuel cell main body containing a fuel cell having an anode side at which fuel is reacted, exhaust products arising at the anode side of the fuel cell as a result of the reaction at the anode side. A recirculation passage is located inside the fuel cell main body and recirculates a proportion of the exhaust products directly to the anode side of the fuel cell for reaction at the anode side. The recirculation passage may include an ejector arrangement for mixing fresh fuel with the recirculated exhaust products and may also include a reforming catalyst for partially reforming the mixture in the recirculation passage.

Abstract: The disclosure relates to an electrostatic precipitator unit with at least two individual power supplies (11) for pulsed operation of electrostatic static precipitators, wherein the power supplies (11) are powered by a common feeding (1), wherein each power supply (11) comprises a control unit (23), and wherein the control units are at least indirectly connected by communication lines (32) allowing for a controlled relative scheduling of the pulsed operation of the individual power supplies (11).

Abstract: A gas purification system for cleaning a carbon dioxide rich flue gas generated in a boiler combusting a fuel in the presence of a gas containing oxygen. The gas purification system includes a compressor for compressing the carbon dioxide rich flue gas, a first gas cooler for cooling the compressed carbon dioxide rich flue gas, a mercury adsorber arranged downstream of the first gas cooler for removing at least a portion of a mercury content of the cooled compressed carbon dioxide rich flue gas, a second gas cooler arranged downstream of the mercury adsorber for further cooling the compressed carbon dioxide rich flue gas, and a gas drier for removing at least a portion of a water content of the further cooled compressed carbon dioxide rich flue gas.

Abstract: Systems and process for volatile degradation removal from amine plant wash water are provided. The systems and processes include a separation device disposed within a water circulation loop and configured to continuously remove at least a portion of the volatile degradation products from the wash solutions. The separation device can be configured for stripping, distillation, and/or extraction of the volatile degradation products from at least a fraction of the spent wash water. Optionally, a chemical agent can be reacted with the volatile degradation products to form heat stable salts for subsequent removal.

Abstract: A membrane for a method for filtration of gas effluents from an industrial installation including a wall having an internal surface and an external surface, the wall having pores of variable dimensions in the radial direction and in the longitudinal direction of the wall.

Abstract: A system and method for tuning a gas turbine combustion system having a plurality of seals positioned between the combustion system and the turbine inlet is disclosed. The system and method provide ways of permitting a predetermined amount of compressed air to bypass the combustion system and enter the turbine so as to control emissions and dynamics of the combustion system. The seals contain a plurality of holes to meter airflow passing therethrough and are positioned such that they can be removed from the engine and modified to increase or decrease the amount of air passing therethrough.

Abstract: A method for reducing mercury emission and/or re-emission in cleaned flue gas through control of dissolved mercury species concentration within a wet flue gas desulfurization (WFGD) system is disclosed. One method for reducing mercury emission and/or re-emission through control of dissolved mercury species concentration is to measure the dissolved mercury species concentration of an aqueous alkaline slurry used in a WFGD system and/or measuring mercury concentration of cleaned flue gas from a WFGD system and comparing the same to a predetermined dissolved mercury species concentration value and/or a predetermined mercury concentration value. If the comparison reveals the measured dissolved mercury species concentration or mercury concentration is above the predetermined values therefor, the amount of cyclodextrin additive supplied to the system is increased.

Abstract: A sinter plant gas cleaning system includes a fabric filter device for removing dust particles from a process gas drawn from a sinter strand of a sinter plant. A duct is adapted to allow the process gas drawn from the sinter strand to pass by the fabric filter device. A measurement device measures a concentration of organic compounds of the process gas drawn from the sinter strand. A control system receives a signal from the measurement device and controls the flow of process gas through the duct.

Abstract: An energy storage system that includes a compressor for compressing a gas, a thermal energy storage for cooling the gas coming from the compressor to a given temperature by heating a thermal storage medium to store thermal energy and a reservoir for storing the compressed gas. The energy system also includes a heat recuperator for further cooling the gas coming from the compressor and thermal energy storage below the given temperature by heating the gas supplied to the compressor.

Abstract: A control system (207) for optimizing a chemical looping process of a power plant includes an optimizer (420), an income algorithm (230) and a cost algorithm (225) and a chemical looping process models. The process models are used to predict the process outputs from process input variables. Some of the process in puts and output variables are related to the income of the plant; and some others are related to the cost of the plant operations. The income algorithm (230) provides an income input to the optimizer (420) based on a plurality of input parameters (215) of the power plant. The cost algorithm (225) provides a cost input to the optimizer (420) based on a plurality of output parameters (220) of the power plant. The optimizer (420) determines an optimized operating parameter solution based on at least one of the income input and the cost input, and supplies the optimized operating parameter solution to the power plant.

Abstract: A raw gas collection system (15) for collecting raw gas from a plurality of aluminum smelting pots (4) is equipped with a plurality of branch ducts (16, 16a-d). Each branch duct (16, 16a-d) is arranged to channel a respective branch flow (32, 32a-b) of raw gas from an aluminum smelting pot (4) to a collecting duct (20a), which is common to and shared by branch ducts (16, 16a-d). Several of the branch ducts (16, 16a-d) are equipped with a combined heat transfer and flow resistance generating element (17) to remove heat from the respective branch flow (32, 32a-b) of raw gas and to balance the flow of raw gas in the raw gas collecting system (15). The combined heat transfer and flow resistance generating elements (17) reduce the need for adjusting the respective branch duct (16, 16a-d) flow volumes using dampers, thereby reducing the power required to transport the raw gas through the system.

Abstract: An extinguishing branch (28) for an electrical circuit (32) includes: a snubber circuit (36) including an energy storage limb (40), wherein the energy storage limb (40) includes first and second energy storage limb portions separated by a first junction (46) to define a first voltage divider, and each energy storage limb portion includes at least one energy storage device (48,50); and an arrester limb (38) connected across the energy storage limb (40), wherein the arrester limb (38) includes first and second arrester limb portions separated by a second junction (52) to define a second voltage divider, and each arrester limb portion includes at least one arrester element (54,56), wherein the first and second junctions (46,52) are connected to define a voltage divider bridge, and the voltage divider bridge is electrically coupleable to the electrical circuit (32) so as to provide, in use, a driving voltage to drive the electrical circuit (32).