Development of fireside performance indices, Task 7.33, Development of methods to predict agglomeration and deposition in FBCS, Task 7.36, Enhanced air toxics control, Task 7.45

Technical Report · Sat Jan 01 04:00:00 EST 1994

DOI:https://doi.org/10.2172/10143433· OSTI ID:10143433

Zygarlicke, C J; Mann, M D; Laudal, D L; Miller, S J

The Energy & Environmental Research Center (EERC) has been developing advanced indices that rank coals according to their fouling and slagging propensity in utility boilers. The indices are based on sophisticated analytical techniques for identifying and quantifying coal inorganics and are useful in predicting the effects of proposed operational changes on ash deposition in coal-fired boilers. These indices are intended to provide an economical way to reduce the amount of full-scale testing needed to determine the best means of minimizing ash-related problems. The successful design and operation of the fluidized-bed combustor requires the ability to control and mitigate ash-related problems. The major ash-related problems in FBC are agglomeration of bed material, ash deposition on heat-transfer surfaces, ash deposition on refractory and uncooled surfaces, corrosion, and erosion. The focus of the Development of Methods to Predict Agglomeration and Deposition in FBCs is on the agglomeration and deposition problems in atmospheric bubbling and circulating beds. The 1990 Clean Air Act Amendments require study of air toxic emissions from coal combustion systems. Since most of the toxic metals present in coal will be in particulate form, a high level of fine-particle control appears to be the best approach to achieving a high level of air toxics control. However, over 50% of mercury and a portion of selenium emissions are in vapor form and are not typically collected in particulate control devices. Therefore, the goal of this project is to develop methods that capture the vapor-phase metals while simultaneously achieving ultrahigh collection efficiency of particulate air toxics.

• Research Organization: North Dakota Univ., Grand Forks, ND (United States). Energy and Environmental Research Center
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FC21-86MC10637
• OSTI ID: 10143433
• Report Number(s): DOE/MC/10637--3710; ON: DE94004103; BR: 400408000/AA0505000
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600
20 FOSSIL-FUELED POWER PLANTS
200202
ACTIVATED CARBON
AGGLOMERATION
ARSENIC
ASHES
BOILERS
CADMIUM
CHEMICAL ANALYSIS
CHEMICAL PROPERTIES
CHROMIUM
COAL
DEPOSITION
ELEMENTS
EMISSION
FABRIC FILTERS
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FLY ASH
FOULING
HAZARDOUS MATERIALS
LEAD
MATERIAL BALANCE
MERCURY
NICKEL
NOXIOUS GAS AND PARTICULATE EMISSIONS
PHYSICAL PROPERTIES
PROPERTIES AND COMPOSITION
QUALITY ASSURANCE
SAMPLING
TRACE AMOUNTS