Improving Fly Ash Deposition in Horizontal Circular Ducting

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Discussion Overview

The discussion revolves around the challenges of improving fly ash deposition in horizontal circular ducting within an incineration plant that treats hazardous industrial waste. Participants explore literature, knowledge mapping, computational fluid dynamics (CFD) analysis, and particle transport theory related to this phenomenon.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant describes the operational context of fly ash deposition in horizontal ducting and its impact on plant operation.
  • Another participant notes that modeling particulate matter in FLUENT is complex and achieving reliable results for soot/ash deposition is challenging.
  • A different participant questions the specific solutions sought from CFD analysis and suggests that CFD could predict pressure loss when flow is obstructed.
  • There is a mention of standard soot/ash traps available in the furnace industry as a potential solution.
  • Participants are encouraged to consult specific academic journals for more in-depth research on combustion and ash deposition.

Areas of Agreement / Disagreement

Participants express varying levels of expertise and uncertainty regarding the modeling of fly ash deposition and the effectiveness of CFD analysis. There is no consensus on specific solutions or approaches to the problem.

Contextual Notes

Limitations include the complexity of particulate matter modeling in CFD, the need for reliable solutions, and the potential variability in results based on different methodologies or assumptions.

Who May Find This Useful

Researchers and practitioners in the fields of combustion engineering, environmental engineering, and industrial waste management may find this discussion relevant.

cucu_datoonn
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Hi all..

Currently I'm mess up myself with a study of an improvement of incineration fly ash deposition in horizontal circular ducting hapen in my incineration plant. This plant treated the hazardous industrial waste as a fuel using fludised bed reactor and silica sand as an innert material. As a product of combustion process, the fly ash flows together with the flue gas to the next chamber (gas cooler) via the circular ducting. The flow initially in vertical direction before enter the horizontal ducting. The was an induced draft by IDF fan which maintain the plant in negative gauge pressure.

Due to some reason, the fly ash inside the flue gas tends to settle down at the floor of circular ducting (horizontal) and eventually will caused the ducting will partially clogged. This problem lead to several impact to the plant operation.

My question here is:
i) Did anyone here can help me with the litrature study of this problem.
ii) Did anyone here can help me to do some knowledge mapping regarding this phenomenon.
ii) I intend to use CFD Fluent to do some analysis on the flow pattern. Can anyone here help me with this stuff?
iv) Did anyone can help me about the particle transport theory?

Thanks in advance
 
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To my knowledge particular matter modeling in FLUENT is not an easy job and getting reliable solutions for soot/ash deposition in the duct isn't either.
 
To my knowledge particular matter modeling in FLUENT is not an easy job and getting reliable solutions for soot/ash deposition in the duct isn't either.

Dear jaap de vries,
Thanks for your comment, since then, do u have any idea about this particular problem? If you can guide me for a knowledge mapping it's very good enough in the mean time and i'll really appreciate that. Looking foward for your next comment. Thanks in advance.
 
Well what solutions are you looking for from your CFD? It could still be used to predict pressure loss ones you 'obstruct the flow'

This is not necessarily my expertise but I would assume that that are standard soot/ash traps available for the furnace industry.

So for highly academic results you might want to look in
Combustion and Flame
Proceedings of the combustion institute
Combustion Science and Technology
 

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