Internal Data Search by Process
Valve Considerations when repowering a coal plant to use a gas turbine
Steve Brown of Crane analyzes valve requirements when repowering from coal to gas .Both cast and forged valves are important for the power industry with forged valves becoming more preferred in the most demanding applications and cast valves still comprising the balance of power plant valve installations.
Revision Date: 4/19/2017
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, 221113 - Nuclear Electric Power Generation * , Crane, Ball Valve, Actuator, High Performance Valve, Steam Cycle
Steam atteperator valve and actuator selection
AEP replaced the existing attemperator valves and actuators with Koso valves and Rexa Electraulic (electro-hydraulic) actuators, giving rangeability and control down to 0.5 percent open.
Revision Date: 3/23/2017
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, 221113 - Nuclear Electric Power Generation * , High Performance Valve, Actuator, Steam Cycle
BWR auxiliary feedwater valves in OTSG
Air-operated valves LCV-4025 and LCV-4026 control steam generator level for the “A” OTSG, and LCV-4007 and LCV-4009 for the “B” OTSG. The level control system for each valve receives a level input signal from a startup range OTSG level transmitter in the essential controls and instrumentation (ECI) system. This signal is compared with a level setpoint, and the resultant error signal modulates the control valve using a proportionalplus- integral controller. Manual control is available in both the main and auxiliary control room. Parallel flowpaths (one from a motor-driven pump, one from the turbine-driven pump) and redundant instrumentation and control power supplies for the level control valves ensure flow to each OTSG. Motor-operated block valves (V-14A and V-31B in the “A” OTSG supply, V-37A and V-20B in the “B” OTSG supply) provide redundant feedwater isolation of an OTSG. The turbine-driven and motor-driven pump discharge lines combine to supply the auxiliary feed ring in each OTSG.
Revision Date: 3/23/2017
Tags: 221113 - Nuclear Electric Power Generation * , High Performance Valve, Actuator, Steam Cycle
Power steam cycle control valves -Trimteck
Power point presentation with diagrammatic locations of valves in various steps in the steam cycle. E.g. main steam cycle . Superheater valves: Maintain boiler pressure below 70%; and modulate pressure to the turbine. Main Steam Attemperator Valve: Controls HP Turbine Temperature at 15% Load Reheater Attemperator Valve: Controls LP Turbine Temperature at 15% Load . Turbine Bypass Valve 6. Superheater Bypass
Revision Date: 3/23/2017
Tags: 221112 - Fossil Fuel 化石燃料, 221113 - Nuclear Electric Power Generation * , 221112 - Fossil Fuel 化石燃料, Trimteck, Ball Valve, Gate Valve, Actuator, High Performance Valve, Steam Cycle
B&W to Collaborate With Toshiba on Power Generation Opportunities
B&W subsidiary Babcock & Wilcox Power Generation Group, Inc. (B&W PGG) has signed a memorandum of understanding with Toshiba Corporation (to cooperatively explore strategic, manufacturing, research and other opportunities in advanced supercritical power generation and solar energy technologies around the world. The memorandum outlines a framework under which B&W PGG and Toshiba can pursue technical collaboration on next generation thermal and solar technologies and explore cooperation on project opportunities in Asia, India and other emerging markets. For example, Toshiba is currently building a steam turbine and generator factory in India, and B&W PGG, through a joint venture, recently began construction on a boiler manufacturing plant near Pune, India. The companies intend to examine joint developments to leverage these unique capabilities and resources to supply the needs of customers in India and elsewhere. This posting is courtesy of Industeel, a supplier of steel for boilers and other nuclear power plant components www.babcock.com.
Revision Date: 5/25/2011
Tags: 221113 - Nuclear Electric Power Generation * , 221112 - Fossil Fuel 化石燃料, Industeel, Babcock & Wilcox, Toshiba, Boiler, Steam Cycle, India
B&W Now Has N-Stamp Certification for Nuclear
Babcock & Wilcox Nuclear Operations Group, Inc. (B&W NOG) manufacturing facility in Euclid, Ohio, has received N-Stamp accreditation from the American Society of Mechanical Engineers. The certification is for assurance of materials, design, construction, operation, inspection and continuing maintenance of nuclear facilities. B&W's Mt. Vernon, Ind.; Barberton, Ohio; Lancaster, Ohio; and Cambridge, Ontario, Canada; facilities also hold N-Stamp certifications. This posting is courtesy of Industeel, a supplier of steel for boilers and other nuclear power plant components www.babcock.com.
Revision Date: 5/25/2011
Tags: 221113 - Nuclear Electric Power Generation * , Industeel, Babcock & Wilcox, American Society of Mechanical Engineers, Boiler, Certification, N-stamp, Steam Cycle
RO Pretreatment Optimization Using particle Monitor/Counter Technology Randy Turner, Southern Company This is an experience report illustrating how particle counter and particle monitor technology was successfully applied to improve RO pretreatment thereby reducing RO cleaning frequency.
Revision Date: 4/14/2011
Tags: 221113 - Nuclear Electric Power Generation * , 221112 - Fossil Fuel 化石燃料, Southern Company, Particle Monitor, Steam Cycle, Water Treatment, USA
Electric Utility Chemistry Workshop, June 7-9, 2011, Champaign, IL, Exhibitors
Now in its 31st year, this comprehensive program features state-of-the-art information on controlling corrosion, improving operation efficiency, and meeting environmental challenges in fossil- and nuclear-fueled power plants. This year’s program is geared toward improved training and continuing education of personnel responsible for electric utility cycle and environmental chemistry. More than 3,000 chemists, consultants, and power plant administrators have attended the workshop since its inception in 1981. The 2011 program has been developed by a committee of representatives from midwestern electric utilities, the Illinois State Water Survey, the University of Illinois at Urbana-Champaign, and consultants serving the power industry. Some of the most popular features of the workshop are the Utility Experience presentations. Seasoned professionals from utility companies discuss their experiences on a range of topics. The entire workshop has been structured to encourage participation from attendees.
Revision Date: 4/14/2011
Tags: 221113 - Nuclear Electric Power Generation * , 221112 - Fossil Fuel 化石燃料, Mettler-Toledo Thornton, Nalco, Ovivo USA, Aquatech, Sentry Equipment, Fuel Tech, Wolcott Water Systems, Waltron, Evoqua Water Technologies, Swan Analytical Instruments, Thermo Scientific, Turner Designs Hydrocarbon Instruments, Sanosil, Lanxess Sybron Chemicals, Conco Systems, Industrial Analytics, Illinois Water Technologies, GE Water, Eco-Tec, Eka Chemicals, AVANTech, Graver Technologies, H2O Innovations, Baker Hughes, Hach, Buckman, Martek Instruments, Veolia Water, Power Generation, Steam Cycle, Water Treatment, USA
Power Industry Experience Using Micro Media Filtration and Short Bed Ion Exchange Geoff Hong, Eco-Tec Inc. With the demand for higher efficiencies and lower maintenance and operating costs for boilers and turbines, high purity water treatment systems are becoming more crucial to the operation of power plants. Modern power plants, operating at supercritical and ultra supercritical boiler pressures and temperatures, require such high purity water that it is approaching theoretical levels. High efficiency gas-fired combustion turbines, which use high purity water for NOx control and sprint mode, heat recovery steam generators and once through steam generators also require high purity water for the same reasons. Effective pre-treatment for reverse osmosis (RO) and ion exchange (IX) demineralizer systems not only contributes to the production of high purity water, but also helps to reduce the operating and maintenance costs of those systems. The versatility and efficiency of short bed ion exchange systems produce high purity water from feeds of variable characteristics, with lower chemicals consumption and waste volumes. This paper discusses the use of micro media filtration as a pre-treatment for RO or IX systems and the use of short bed IX systems for the production of high purity boiler feed make up water and condensate polishing. The experiences of several installations are outlined for applications in power generation and cogeneration plants.
Revision Date: 4/14/2011
Tags: 221113 - Nuclear Electric Power Generation * , 221112 - Fossil Fuel 化石燃料, Eco-Tec, Ion Exchange, Filter Media, Steam Cycle, Water Treatment, USA
RO Membrane Pretreatment Ken Robinson, Avista Technologies Pretreatment continues to be a subject that turns up on a daily basis when dealing with RO (Reverse Osmosis) process. Even though pretreatment requirements are well established for RO, the power utility market as a whole tends to see more of these issues as compared to other industries. Part of the reason for this trend is that feed water supplies tend to originate from surface sources while other factors tend to be more directed at equipment and design specifications. This presentation will focus on a number of pretreatment strategies that various power utilities have dealt with over the course of the last couple of years. RO system cases involving softening, coagulation, ultrafiltration, and media filtration will be covered along with RO process issues such as scaling, filtration, and biogrowth. In each of these cases, solutions will be presented on how to best mitigate the problems and show how analytical techniques can be used to fine tune and minimize the impact of the problems.
Revision Date: 4/14/2011
Tags: 221113 - Nuclear Electric Power Generation * , 221112 - Fossil Fuel 化石燃料, Avista Technologies, Treatment Chemical, Water Treatment, Steam Cycle, USA
Outsourced Water Treatment Provides Higher Purity for Nuclear Power Plant Michael Reyes, Crown Solutions Crown Solutions Co., LLC, a Veolia Water Solutions & Technologies company was contacted by a Nuclear Power Plant to develop a competitive solution to design, build, install, operate, and maintain a new 400 gallon per minute (GPM) ultra high purity demineralized water plant to replace their internally operated, 20+ year old, demineralized water plant. As part of upgrade and replacement, the client required higher quality demineralized water from their lake water source, specifically parts per trillion (ppt) concentration levels of metals, low total organic carbon, and low dissolved oxygen levels. The client also required specialized contingency for mobile water to backup the redundant installed system. This paper will examine and describe the design selection criteria, startup performance data, and special considerations necessary for the successful implementation of the process.
Revision Date: 4/14/2011
Tags: 221113 - Nuclear Electric Power Generation * , Crown Solutions, Water Treatment, Steam Cycle, USA
A New Approach to On-line Sodium Measurement David Gray, Mettler-Toledo Thornton, Inc. Sodium has been a critical measurement parameter for ensuring water treatment performance and purity for nearly four decades. Monitoring cation exchange performance and the purity of makeup water, steam and condensate has benefitted from measurement of this key parameter. Many refinements have been made to the ion-selective electrode method for on-line sodium measurement for these applications. Described here are yet further improvements to this technology including an unique integrated electrode system that measures both sodium and pH to assure proper reagent delivery. The system design minimizes reagent consumption and reduces maintenance requirements well below current practice. The new sodium system uses a particularly simple automatic calibration method and also provides the ability to measure grab samples easily. Its implementation with an operator interface common to other parameters including conductivity, dissolved oxygen, pH and ORP makes it especially convenient for installation and operator training.
Revision Date: 4/14/2011
Tags: 221113 - Nuclear Electric Power Generation * , 221112 - Fossil Fuel 化石燃料, Mettler-Toledo Thornton, Monitoring, Water Treatment, Steam Cycle, USA
Comparison of Dissolved Oxygen Measurement Technologies Kenneth Kuruc, Hach Company Dissolved oxygen measurement in the steam cycle remains a key parameter for the monitoring and control of corrosion. A variety of methods, including colorimetric and electrochemical (galvanic and polarographic), continue to be employed as either field test, portable or process platforms. However, most methods to this point have required a fair amount of attention and expense in order to maintain proper operation. In this paper we will discuss the traditional methods along with a relatively new technology known as “optical” or “luminescence”. The significance and potential advantages of this new technology for the power industry will then be considered.
Revision Date: 4/14/2011
Tags: 221113 - Nuclear Electric Power Generation * , 221112 - Fossil Fuel 化石燃料, Hach, Optical Dissolved Oxygen Monitor, Steam Cycle, Water Treatment, USA
Do Neutralizing Amines Have a Role in the Treatment of High Purity Boiler Feedwater? James (Jim) Robinson, Luis Carvalho, Robin Kluck, Richard Krichten, GE Power & Water – Water & Process Technologies Neutralizing amines have been widely used to treat high purity boiler feedwater since at least the 1940s. Notable benefits have been derived, however some consider the use of these amines to be risky. In addition the use of organic chemicals for boiler feedwater treatment often causes steam and condensate cation conductivity levels to exceed current power industry and steam turbine vendor guidelines. The benefits that can be derived and questions concerning the use of neutralizing amines are presented to help plant operators assess the potential value of using them in their systems.
Revision Date: 4/14/2011
Tags: 221113 - Nuclear Electric Power Generation * , 221112 - Fossil Fuel 化石燃料, GE Water, Steam Cycle, Water Treatment, USA
On-Line Water Chemistry Measurements for Power Plants Ravi Jethra, Fred Kohlmann, Bhupen Patel, Endress + Hauser Inc. At the center of every efficient power plant, there is a well run water treatment system. Correct water treatment is crucial to provide high purity water to pre heater, boiler, steam and condensate systems, as well as other systems using boiling-water reactors and pressurized water reactors. The quality of makeup and feed-water is required to be monitored continuously to detect chaining water quality parameters (WQP). These changes in WQP usually indicate maintenance, upsets, leaks, and carryover. The long term data review of WQP also helps to study the gradual trends for prevention of corrosion or scaling. In case of inadequate measuring systems, these conditions may result in increased or unscheduled maintenance, higher capital cost, lower efficiency of heat transfer surfaces, and less profits due to down time. As newer and better technologies increase the power plant efficiencies in other area, the allowable limits on water quality become increasing important. Therefore, the requirements of WQP measurements become more important. The paper discusses data from case histories on water quality. In addition, the authors discuss how WQP measurements can be utilized to implement savings in reagents in the treatment process. The information presented in this paper would be helpful to operations managers, maintenance staff, and process owners of water treatments associated with power and steam utilities.
Revision Date: 4/14/2011
Tags: 221113 - Nuclear Electric Power Generation * , 221112 - Fossil Fuel 化石燃料, Endress + Hauser, Monitoring, Steam Cycle, Water Treatment, USA
Using in-situ Feedwater ORP Control to Improve Boiler System Operation Daniel Cicero, Nalco Company This paper discusses the value controlling reductant feed based on in-situ feedwater ORP measurements. Two case studies will be presented: a large, coal-fired unit in the western US that achieved a 75% reduction in start-up time and an intermittently-operating combined-cycle gas turbine plant that reduced corrosion product transfer.
Revision Date: 4/14/2011
Tags: 221113 - Nuclear Electric Power Generation * , 221112 - Fossil Fuel 化石燃料, Nalco, Monitoring, Steam Cycle, Water Treatment, USA
Boiler Feed and Cooling Water Treatment Webinar - Hot Topic Hour January 27, 2011
Discussion of latest technologies to treat feed and cooling water from natural and process sources and also the economics of various treatment technologies focusing on energy use, chemical requirements, capital costs, reuse of process water and operation and maintenance costs and issues. Password: hth106
Revision Date: 1/27/2011
Tags: 221112 - Fossil Fuel 化石燃料, 221113 - Nuclear Electric Power Generation * , Dow Water Solutions, Nalco, Veolia Water, Water Treatment System, Water Monitor, Demineralizer, Ion Exchange, Steam Cycle, Water Treatment