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G714: Sulfation Model For In-Furnace Calcium- Based Sorbent Slurry Injection

Various steps are involved in S02 removal by furnace injection of dry or slurry calcium-based sorbents (limestone and hydrated lime). These include evaporation of slurry droplets, sorbent particle heat-up, activation of sorbent by calcination, reduction in active sorbent surface area by sintering, and sulfation of calcined sorbent. A computer program was developed for simulation of the overall S02 removal process with dry and slurry injection of calcium-based sorbents. An existing model for sulf

Mar 1, 1992

TGIG

Research

G948: On-Line Coal Analyzer - Phase I

The primary objectives of this study were to configure a coal analysis system which would address operational and performance requirements set forth by the Canadian Electrical Association (CEA). Several commonly used technologies were reviewed and several other technologies were evaluated in a laboratory environment.The data and other review informations were analyzed to configure a system. The recommended system configuration utilizes a common existing technology (dual energy gamma transmission

May 1, 1993 - Oct 1, 1993

TGIG

Research

G928: Corrosion Fatigue of Waterwall Tubes in Fossil-Fuelled Boilers

A test facility and methodology developed by Ontario Hydro for earlier project has been used to investigate the effect of water chemistry and mechanical loading parameters on the development of corrosion-fatigue cracking in carbon steel boiler tubes. Water chemistry parameters investigated were: dissolved oxygen, solution pH and temperature.A statistically-designed test matrix was carried out to define their effects and possible interactions. Mechanical parameters investigated were: cyclic loa

Jan 1, 1993 - Oct 1, 1995

TGIG

Research

G939: Premature Failure of High Temperature Bolting

This report describes the major influences that prevail with respect to the premature failure of HT bolting. Both mechanical and metallurgical influences are considered and a "best practice" for failure avoidance is outlined. Some recommendations are also given for further work to resolve areas of uncertainty.

Jul 1, 1993 - May 1, 1994

TGIG

Research

G713: Evaluation of Advanced Limestone Slurry Flue Gas Desulphurization Processes Volumes I+II Pricing For Set of 2 Volumes

The objective of this evaluation was to compare four advanced limestone slurry FGD systems (counter-current, co-current, combination co-curent counter-current and jet bubbling reactor). The systems had to meet the design and performance requirements established by the CEA and produce a commercial grade gypsum by-product while burning a high sulphur coal. System characteristics and economics are presented for two Canadian Power Plants: Ontario Hydro's Nanticoke Unit 8 (510 MW) and Nova Sco

Mar 29, 1992

TGIG

Research

G198: EVALUATION -OF A COMMERCIAL EMATSDEVICE FOR BOILER TUBE WALLTHICKNESS MEASUREMENT

A commercial electromagnetic acoustic transducer (EMAT) material thickness tester was evaluated in the laboratory on a variety of plate materials, and on clean and scaled boiler tubing. In general, signal amplitudes were very weak and variable, though time of flight signals were sharp and reliable.

Nov 1, 1981

TGIG

Research

G624: Steam Turbine Blades Off-Frequency Operation

Utility steam turbines generating in relatively small interconnected systems are subject to significant frequency variations due to sudden load changes or unit loss. Some blade failures experienced by these utilities may have been caused by stresses created by, or contributed to, off-frequency operation. Research was performed to study the effect of off-frequency operation of turbine blade life. Five utilities were surveyed for operational and blade failure information. Several turbine manufa

Dec 31, 1988

TGIG

Research

G814: Survey of Sorbent Injection Processes

The goals of this program were twofold. A literature review was conducted of sorbent injection technologies which reduce S02 emissions from coal and oil-fired power plants. The purpose of the review is to provide utilities serviced by the CEA with current information on the various sorbent injection technologies which will allow them to make informed decisions on acid rain gas control technologies. Systems are included which inject sorbents at different temperature ranges (different injection lo

Dec 1, 1992

TGIG

Research

G771: Mini-Pilot Selective Catalytic Reduction System for Utilization at Canadian Electric Utilities - Phase I

The program objectives are to establish the requirements and develop a design for a mini pilot SCR plant capable of evaluating NOx control effectiveness using full scale commercial catalyst elements with a coal-fired boiler flue gas slipstream. Up to four catalyst systems with a total flow equivalent to 1 MWe are to be evaluated for long term, multi-year durability and intrinsic performance. A plan for implementing the project including estimates of the capital cost of constructing the plant and

Jan 1, 1991 - May 1, 1991

TGIG

Research

G147: Nature of Interalloying in Induction Bracing of Inconel 600 Using 60-40 Pd-Ni Alloy

In August 1978, during the scheduled shutdown of the Pickering generating station, debonding of brazed joints was observed in some self powered netrron flux detectors. An experimental investigation into the possible interrelationship between the corrosion resistance of brazed joints and their manufacturing or operating conditions was carried out using laboratory facilities simulating the production process and special operating environment. Corrosion resistance was evaluated by exposing the braz

Nov 28, 1980

TGIG

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