Determination of Baghouse Performance from Coal and Ash Properties: Part I

Bush, P. Vann; Chang, Ramsay

doi:10.1080/08940630.1989.10466523

Cited by 11 publications

(14 citation statements)

References 2 publications

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“…Also shown in Figure 6 is the impact of the bed porosity on the predicted removal efficiency. The range of the bed porosities investigated in this study corresponds to the range reported by Bush et al 20 for full-scale coal-fired power plants employing a baghouse for particulate control. shows that the pore diameter and tortuosity significantly impacts the predicted Hg removal efficiency from the baghouse filter.…”

Section: Parameter Sensitivitymentioning

confidence: 88%

“…However, this premise would also result in an unrealistic calculated final thickness of the bed before cleaning of 0.037 mm (vs. 2.2 mm for the current model). Bush et al 20 reported a cake thickness ranging from 0.86 to 8.7 mm for full-scale coal-fired power plants employing a baghouse for particulate control.…”

Section: Evaluation Of Scala's Modelmentioning

confidence: 99%

“…The activated carbon density ( p ϭ 2.04 g/cm 3 ) and porosity (ε p ϭ 0.67) were provided by the manufacturer. Yang 19 reports that the tortuosity ( p ) for activated carbons ranges from 5 to 65, and Bush et al 20 report that the bed porosity (ε b ) for full-scale coalfired power plants employing a baghouse for particulate control ranges from 0.57 to 0.86. Table 1 lists baseline model parameters that were used in this study.…”

Section: Parameter Estimationmentioning

confidence: 99%

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Modeling Sorbent Injection for Mercury Control in Baghouse Filters: I—Model Development and Sensitivity Analysis

Flora

Hargis

O’Dowd

et al. 2003

Journal of the Air & Waste Management Association

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A two-stage mathematical model for Hg removal using powdered activated carbon injection upstream of a baghouse filter was developed, with the first stage accounting for removal in the ductwork and the second stage accounting for additional removal caused by the retention of carbon particles on the filter. The model shows that removal in the ductwork is minimal, and the additional carbon detention time from the entrapment of the carbon particles in the fabric filter enhances the Hg removal from the gas phase. A sensitivity analysis on the model shows that Hg removal is dependent on the isotherm parameters, the carbon pore radius and tortuosity, the C/Hg ratio, and the carbon particle radius.

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Section: Parameter Sensitivitymentioning

confidence: 88%

Section: Evaluation Of Scala's Modelmentioning

confidence: 99%

Section: Parameter Estimationmentioning

confidence: 99%

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Modeling Sorbent Injection for Mercury Control in Baghouse Filters: I—Model Development and Sensitivity Analysis

Flora

Hargis

O’Dowd

et al. 2003

Journal of the Air & Waste Management Association

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“…The porosity of the cake is dependent on coal and ash properties. 4 The thickness of the dustcake is dependent on several factors but is primarily dependent on the effectiveness of the cleaning system. Therefore, the thickness of the cake (and consequently the ∆P) can be affected by changes in the baghouse operation.…”

Section: Pressure Dropmentioning

confidence: 99%

“…These were usually attributed to difficult-to-collect ashes with atypical ash properties. 3,4 Emissions from baghouse installations are maintained at a constant low level, except for the initial and final periods of the bag service life. For approximately the first week of operation with new bags, opacity spikes can occur when a compartment is returned to service after cleaning.…”

Section: Emissionsmentioning

confidence: 99%

Status and Future of Baghouses in the Utility Industry

Merritt

Bush

1997

Journal of the Air & Waste Management Association

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The cumulative years of service of baghouses in the electric utility industry have doubled since the last industrywide review of their operating performance. We have gathered information from all 102 operating baghouses to develop an updated record of how this technology continues to serve the electric utility industry. In general, baghouse performance has met or exceeded the expectations for controlling emissions. There are, however, wide ranges of pressure drop and bag life performance. Most operators report a long-term trend of increasing pressure drop. The life expectancy of filter bags averages 7.5 years, with more than 20% of the population achieving more than 10 years of bag life. Factors such as coal and ash properties certainly affect baghouse operation, but another reason for variations in bag life is the lack of an optimized protocol for controlling the long-term buildup of residual dustcake. We conclude that many baghouses could operate with lower pressure drop and longer bag life by optimizing the cleaning system. Dustcake weight or drag are better indicators of performance than pressure drop and should be used to develop an optimum baghouse operating protocol. BACKGROUNDSince the first utility baghouse was installed by Pennsylvania Power and Light Company at its Sunbury Station in 1973, 1 electric utilities have installed 119 baghouses on approximately 24,000 MW of power generation capacity.

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Factors affecting dustcake drag in a hot-gas filter system collecting coal gasification ash

Dahlin

Landham

2008

Powder Technology

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Determination of Baghouse Performance from Coal and Ash Properties: Part I

Cited by 11 publications

References 2 publications

Modeling Sorbent Injection for Mercury Control in Baghouse Filters: I—Model Development and Sensitivity Analysis

Modeling Sorbent Injection for Mercury Control in Baghouse Filters: I—Model Development and Sensitivity Analysis

Status and Future of Baghouses in the Utility Industry

Factors affecting dustcake drag in a hot-gas filter system collecting coal gasification ash

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