The High Temperature, High Pressure Gas Stream Utilized by the Gas Turbine is a Critical Feature of advanced coal fired power generation systems such as pressurized fluidized bed combustion (PFBC) and best bedsheet integrated gasification combined cycle (IGCC). In order to protect the gas turbine components from erosion, it is necessary to remove the ash and sorbent particulates from the turbine inlet gas stream. In first generation PFBC plants, hot cyclones provide a sufficiently clean gas stream for a ruggedized turbine. If you have any queries with regards to wherever and the best way to use best bedsheet (bestbedsheet.livejournal.com), you can e-mail us on the page. Second generation PFBC plants use a topping combustor to increase the gas temperature to 2,300 F or best bedsheet higher, and best bed sheet an advanced gas turbine for increased cycle efficiency. At these higher temperatures, hot cyclones are not sufficient to protect the gas turbine, and rigid barrier filters are required.
Two basic configurations of barrier filters are the candle filter and the tube filter. The candle-filter consists of a closed end tube measuring approximately 2.5 in. diameter by 5 ft. long. Candle filters are mounted to tube sheets or best bedsheet singapore manifolds in various configurations by Westinghouse, best bed sheet Pall, and LLB. The Asahi Glass Company developed a tube filter configuration that utilizes large open-end tubes (approximately 6.5 in. diameter by 10 ft. long) mounted between cooled tube sheets in multiple compartment vessels.
To ensure plant availability and to prevent unscheduled plant shutdowns, hot-gas filter elements must be sufficiently rugged to withstand the mechanical and best bedsheet thermal conditions associated with a power plant environment. The mechanical environment includes shipping, installation and inspection/removal. Although filter element damage during shipping or best bedsheet installation would not result in plant downtime, the filter elements may be damaged to the extent that even normal operating conditions could lead to failure and downtime.
During normal operations the filter elements are exposed to temperatures up to 1,560 F in a combustion atmosphere containing water vapor, alkali and best bedsheet sulfur. In addition, the accumulated dust cake is periodically removed by back pulsing with near ambient temperature gas. As in many material applications, the nominal operating conditions present only part of the challenge. Plant upset conditions, on the other hand, typically present a serious threat to the filter element and account for the bulk of the failures.
Some pilot scale screening tests have simulated the thermal fatigue associated with accelerated back pulsing and the more severe thermal transients relating to turbine trips and combustor…