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Proper Steam Bypass System Design Avoids Steam Turbine Overheating
The steam bypass system is generally used during the following modes of operation: start-up and shutdown, steam turbine trip, steam turbine no-load or low-load operation, and simple-cycle operation. On start-up, the isolation of the CTG/HRSG from the STG allows the CTG to be placed on load without delay and well before the heat-up and roll-off of the STG. In addition, a faster start-up of the STG is possible since the bypass system provides the capability of close temperature matching between the steam inlet temperature and the steam turbine metal temperature.
Revision Date: 9/9/2019
Tags: 221118 - Other Electric Power , 221118 - Other Electric Power , Turbine, Valve, Power Engineering
Vector and Wellheads engineering turbine bypass system
This paper has a good flow diagram with valve locations. The turbine bypass system is a very important component in power stations, and of a difficult service too.
Revision Date: 9/9/2019
Tags: 221118 - Other Electric Power , 221118 - Other Electric Power , Vector & Wellheads Engineering SL, Valve, Turbine
Valvtechnologies Turbine Bypass System
The steam turbine bypass system will allow the operator to keep the gas turbine and the heat recovery system generator (HRSG) on-line in the event of a steam turbine trip or to facilitate faster start-ups of the CT and HRSG.
Revision Date: 9/9/2019
Tags: 221118 - Other Electric Power , 221118 - Other Electric Power , Valvtechnologies, Valve, Turbine
5-year bag life for Dry scrubber with PPS/P84 bags.
A Czech coal burning power plant is provided with a fluidised bed boiler, a dry scrubber with calcium hydroxide as a reagent and a bag house. The baghouse is a pulse jet design with 550,000 aM3/hr capacity. The initial set of filter bags was based on a 100 % PPS material. The bags failed on high-pressure drop caused by filter material blinding. It was decided to replace these bags with bags based on a PPS/P84 blended fibres in order to improve the filtration efficiency and prevent the dust penetration into the cross section of the material. F i g u r e 9 shows the condition of the needle felt before the replacement was required and the condition of the new PPS/P84 filter media with a well-defined dust cake and no dust penetration. This bag house is achieving more than five years of bag life operation.
Revision Date: 8/21/2019
Tags: 221118 - Other Electric Power , Evonik Industries, Bag, Czech Republic
Tata Power March 2019 bid request for 1 x 67.5 MW DSI FGD system
Design, engineering, manufacture, shop fabrication, assembly, shop testing, type testing at manufacturer's works, inspection, packing, supply, loading, unloading, transportation, proper preservation at site, storage & handling at site, erection/installation, construction, site testing and commissioning and performance testing of DSI based Flue Gas Desulphurization (FGD) System for 100% of the flue gas flow rate for the 1 x 67.5 Unit No 1 of Jojobera Thermal power plant located at near Jamshedpur, East Singhbum District, Jharkhand State, India In order to limit the SO2 emissions in the thermal power units, it is proposed to install Flue Gas Desulfurization (FGD) system at Jojobera for Unit 1 for treating 100% of Flue gas coming out of this unit. The outlet SO2 emissions shall be limited to 600 mg/Nm3 as per latest standards stipulated by MoEF&CC under Environment (Protection) Amendment Rules 2015 for thermal power plants. Bidder to offer a Sodium Bicarbonate based dry sorbent injection system (DSI).
Revision Date: 8/20/2019
Tags: 221118 - Other Electric Power , Tata Power, Direct Sorbent Injection, India
2X700 MW Supercritical Rajpura Power Plant Project Developed by Larsen & Toubro
This project was developed under Case-2 of Tariff based Bidding 25 Years Power Purchase Agreement (PPA), signed in January 2010 with Punjab State Power Corporation Limited (PSPCL). Fuel Supply Agreement (FSA) for 5.55 million TPA with South Eastern Coalfields Limited, All major equipment manufactured indigenously through technology tie-up or JV’s Tie-up with leading manufacturers-Mitsubishi Hitachi Power Systems (MHPS), Japan for Boiler Turbine Generator (BTG), Howden-Regenerative Air Pre-heater(RAPH) & Fans, Clyde Bergmann-ESP Advanced A-PM Burners NOx level compliant to New MOEFCC Guidelines, RO plant for effluent recycling • Reject used for bottom ash slurry preparation • Functional ash water recovery system.
Revision Date: 8/12/2019
Tags: Clyde Bergemann, Howden, MHPS, Larsen & Toubro, Punjab State Power, India
Procedair dry scrubber supplied for a 100 tpd waste to energy plant in Canada
An overview of the Air Pollution Control system at Canada's most recently retrofitted Energy-from-Waste facility is presented. The plant burns 100 tons per day of municipal solid waste in three modular incinerators, which are ducted to a common system for steam generation, heat recovery, and APC. Procedair Industries Inc. provided an All-Dry Scrubbing System for the APC, consisting of a custom-designed venturi reactor, fabric filter, and reagent handling system. The reagent is hydrated lime and the filter bags are woven fiberglass with a Teflon '8' finish. The system is designed for 35, 100 Nm3 /hr of flue gas at 138 to 184'F, and high concentrations of particulates and acid gases. Performance objectives included up to 95% removal efficiency in particulates, doixions/furans, and HCI concentration, and 80% reduction in S02' The system has been operating successfully since early 1997, and recent stack testing has shown that key performance targets are being easily met.
Revision Date: 8/12/2019
Tags: 562213 - Solid Waste Combustors and Incinerators , Procedair Industries, Inc., Circulating Dry Scrubber, Filter Media, Canada
At Turow, Poland Derakane replaces borosilicate glass
The FGD (Flue gas desulfurization) unit operates at a temperature of 160 F (70C) under normal conditions. However, during the construction period, two of the four units were not operative and ran in the bypass mode. During the by-pass operation one of the units ran for two years at temperatures up to 320F (160 C). The previous chimney liners were constructed of borosilicate blocks which needed to be replaced due to the wet circumstances and the huge swings in temperature 70 – 320 F (20 – 160 C). Each of the four units consisted of a chimney liner 17 feet (5.3 m) in diameter and 395 feet (120 m) tall. In addition, there was a total of 1100 feet (330 m) of ductwork with the same diameter. FRP fabricated with Derakane 470HT was selected for this project due to its chemical resistance to the wet flue gas and its ability to manage the huge swings in temperature up to and beyond 320F (160 C).
Revision Date: 8/5/2019
Tags: 221112 - Fossil Fuel 化石燃料, Ashland, Chimney, FRP, Poland
TVA investing in many projects to meet the CCR requirements
Plans have been made for each coal plant with various alternatives depending on changes in the regulations. Details on the plans for each plant are provided.
Revision Date: 7/11/2019
Tags: 221112 - Fossil Fuel 化石燃料, Tennessee Valley Authority, Regulations & Policy, Reviews, USA
Agenda for July 19 and July 14 PacifiCorp Webinars
Ways to reduce a $700 Million NOx Control Requirement
Revision Date: 7/26/2016
Tags:
2012 FGD and SCR Supplier Totals in China
This tabulation in Chinese has the MW of FGD and SCR orders for each of the major suppliers for the year 2012 as well as historical totals through 2012.
Revision Date: 7/21/2014
Tags: FGD, SCR, Coating, Market, China