Internal Data Search by Text Descriptor
Upgrading limestone scrubber system
MET has one of the largest reference lists of FGD scrubbers with some of the systems dating back more than 40 years. There are a number of ways to improve performance by improving the distribution and quantity of the sprayed liquid. Another option is to install a tray in an existing open spray tower. This paper was presented in 2012 but will prove useful to owners thinking about upgrades.
Revision Date: 8/29/2019
Tags: MET, Scrubber
Summary of Air Emissions from the First Year Operation of JEA’s Northside Generating Station
This was a 2003 paper, but information is relevant today. Each CFB’s Dry Scrubbing System consists of a Wheelabrator Air Pollution Control, 48 ft. diameter, spray dryer absorber followed by an eight compartment JET VIP™ intermediate pressure pulse jet fabric filter. The slurry pumping and valve system is designed to isolate individual atomizing nozzles for repair during operation. The paper does not detail the valve description or manufacturer but at DSUA meetings there have been a number of discussions on the Fujikin valves for this service.
Revision Date: 8/27/2019
Tags: Wood Group, Wheelabrator Group, Fujikin, De-asphalting Units, Slurry, Spray Dryer, Control Valve
BCP investment worthwhile for supercritical startup
The objective of this paper is to analyze the variation of start-up parameters such as fuel consumption, water consumption and the start-up cost of a boiler operating with a Boiler Circulation Pump (BCP) and without a BCP.
Revision Date: 7/25/2019
Tags: Pump, Boiler
This paper discusses three projects in which low ripple three-phase power supplies (TPPS) were used as part of the solution in reducing the ESP PM emissions. TPPS have been used on coalfired boiler ESPs in Europe for many years, and in the past three years, Babcock & Wilcox (B&W) has more than 800 installations in China on cement kiln ESPs. Previous to this writing, there had been no installations of the TPPS in the United States (U.S.). 1. The Babcock & Wilcox Company, Barberton, Ohio, 2. Dynegy Wood River Generating Station, Alton, Illinois, 3. Duke Energy, Crystal River Generating Station, Crystal River, Florida. John A. Knapik, 1, Jia (Erick) Ma, 1, Steve Burgund, 2, Morgan Beveridge, 3, Steve Marchigiano, 3, and Michael Williams, 3;
Revision Date: 7/16/2019
Tags: Babcock & Wilcox, Dynegy, Duke Energy, Europe, China
China developing new flyash uses as building industry slows
China’s coal-fired power plants produce about 600 million tons fly ash annually, which has caused severe economic and environmental problems. This paper first describes briefly the production and utilization status of coal fly ash in China. Then it analyzes the main challenges to the fly ash utilization in China due to the conflict between the huge amount of production of fly ash and the depressed consumption of fly ash, as well as the increasing driving forces in environmental protection. Subsequently, the new developments of fly ash utilization in China, including valuable elements extraction, geopolymer production, fly ash-based ceramics synthesis and soil desertification control are introduced in detail. CFA can mix with cement, gypsum and clay, etc. to produce autoclaved aerated concrete blocks. Because no high temperature is required. This technique reduces air pollution and decreases energy consumption, so the above utilization ways are very popular in China.
Revision Date: 6/27/2019
Tags: 221112 - Fossil Fuel 化石燃料, Flyash, Production, Utilization, Environmental Protection, China
Intelligent Combustion Optimization is a proven methodology to accomplish plant performance improvements, boiler efficiency increase and reduction in emissions.
Revision Date: 7/26/2016
Tags: Siemens
Boiler Feedwater Pump Efficiency Optimization - Yokogawa
The optimization of boiler feedwaer operations depends on controlling feedwater and drum pressure. The Yokogawa Dpharp can measure pressures up to 2000 psi and can measure across a range of pressures with high accuracy. Significant energy and maintenance reduction is achieved with optimization of pressure differential.
Revision Date: 9/17/2014
Tags: 221112 - Fossil Fuel 化石燃料, Yokogawa Electric, Boiler Feedwater Pump, Efficiency, Optimization
Coal to Natural Gas Electric Utilities Repowering: Consequences for Valve Usage and Replacement
US power generating plants are converting from coal to other fuels in large numbers. In some cases the existing infrastructure is (to the extent possible) retained, with only the combustible material being altered. In the “middle” are plants that "repower" by using an existing turbine to run on steam from a heat recovery steam generator (HRSG) that draws (recycles) exhaust heat from a new gas turbine, together forming a combined cycle. At the other end of the scale are newly constructed power plants, which are predominantly gas-fueled. Each of these three repowering alternatives requires a different quantity of new valves, often of varying types.
Revision Date: 9/10/2014
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, Crane, Valve, Repower, Fuel Switching
What are the water quality issues? Bill Harfst indicated that with chemical additions the cooling tower cycles of concentration can be increased from the present 3-4 to as many as 10. This greatly reduces water use.
Revision Date: 6/5/2014
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, Harfst and Associates, Cooling Tower, Cooling
Alan Gaulke of AECOM highlighted some of the important aspects of cooling water intake structure rules.
Revision Date: 6/5/2014
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, AECOM, Water Intakes, 316(b), Water Intake
Measuring Ammonia Slip from Post Combustion NOx Reduction Systems
In many facilities there may be room for process improvement that could reduce operating costs or provide revenue enhancement opportunities. Operating SNCR or SCR technology closer to its limit offers these benefits but increases the risk of high ammonia slip. The risk could be abated with the use of ammonia monitoring technology. But, except for gas-fired plants, continuous ammonia slip monitoring technologies have not been available at a practical price to facilitate these cost-saving or revenue enhancing improvements. Conditions that exist in high dust, high temperature, high NOx and/or high SO2 environments make most analyzer methods of continuously measuring ammonia unsuitable for application to coal plants. An overview of the technologies available for measuring ammonia in the high dust region downstream of a Nox reduction system and the status of their development is provided.
Revision Date: 4/14/2014
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, Andover Technology Partners, SNCR, SCR, Analyzer - TDL, Analyzer - NH3, Ammonia Slip, Monitoring, Ammonia Monitoring
Constellation Energy installed SNCR systems at the CP Crane Station, units 1 and 2. These SNCR systems use continuous ammonia slip analyzers that work on the principle of tunable diode laser (TDL) spectroscopy and provide continuous, real-time indication of ammonia slip in the duct. These analyzers facilitated optimization of the SNCR system to avoid high ammonia slip transients that are the principal contributors to downstream problems normally associated with ammonia slip.
Revision Date: 4/14/2014
Tags: 221112 - Fossil Fuel 化石燃料, 221112 - Fossil Fuel 化石燃料, Constellation Energy, Tourgee & Associates, Andover Technology Partners, Analyzer - NH3, SNCR, Analyzer - TDL, Ammonia Slip, Monitoring, Ammonia Monitoring, USA
Predictive Emissions Monitoring is an option for gas turbine NOx measurement
Thomas Eisenmann is presenting a paper at CEM 2014 which explains why predictive monitoring is an option for the primary monitoring of gas turbines and duct burners or as a secondary measurement tool. PEMS offer significant cost benefits with lower capital expenditures as well as much lower operational and maintenance cost than CEMS. PEMS and DAHS require for operation very little or no plant manpower. CEM 2014 The 11th International Conference and exhibition on Emissions monitoring will take place in Turkey in the country’s financial and cultural capital, Istanbul, from the 14th – 16th May 2014.
Revision Date: 4/14/2014
Tags: 221112 - Fossil Fuel 化石燃料, Durag, Predictive Emissions Monitor, Analyzer - Nox, Monitoring, Nox Monitoring
Fabric Expansion Joints - Terms and Definitions
A glossary of terms prepared by the Quality Association for Fabric Expansion Joints.
Revision Date: 11/22/2010
Tags: 221112 - Fossil Fuel 化石燃料, Expansion Joint, Exhaust Handling
Analysis of Metal and Fabric GTX Expansion Joints
Deciding whether to use a metal or fabric expansion joint generally depends on the application specifications, according to this analysis prepared by EJS.
Revision Date: 11/4/2010
Tags: 221112 - Fossil Fuel 化石燃料, Expansion Joint, Exhaust Handling
Design Criteria for Gas Turbine Exhaust Fabric Expansion Joint Assembly
Flexfab Niagara supplies fabric expansion joint assembly according to Specification from GE Schenectady’s multi-disciplinary 6FA, 7F/A, 9F/FA Task Force, April 1996
Revision Date: 11/4/2010
Tags: 221112 - Fossil Fuel 化石燃料, Flexfab Niagara, Expansion Joint, Exhaust Handling
Problems & Solutions with Expansion Joints in Gas Turbine Exhaust Systems
A white paper by James Walker Townson.
Revision Date: 10/25/2010
Tags: 221112 - Fossil Fuel 化石燃料, James Walker Townson, Expansion Joint, Exhaust Handling