What serves as the primary barrier preventing widespread adoption of pulverized coal firing in boilers ?
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Answer: A. Ash disposal problem
Explanation
Pulverized coal firing generates massive quantities of fine ash that must be captured and disposed of safely. Handling and disposing of this solid waste poses significant logistical and environmental challenges for plants. Ash management costs and disposal site availability remain major deterrents for certain facility locations. Burning pulverized coal converts mineral impurities in the coal into fly ash and bottom ash. Air pollution control devices like electrostatic precipitators capture fly ash before gases reach the stack. Landfill space for storing ash byproduct has become increasingly scarce and heavily regulated over time.
Power stations operating on pulverized coal invest heavily in ash handling and beneficial reuse programs. Overcoming ash disposal hurdles is essential for maintaining environmentally compliant industrial operations. Alternative combustion technologies are sometimes chosen to minimize heavy ash handling infrastructure requirements. Excessive fly ash discharge is successfully controlled using modern electrostatic precipitators and baghouses. Higher transportation power consumption is manageable and not the primary barrier to adoption. Induced draft fan blade erosion is mitigated using wear resistant coatings and efficient dust collectors.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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