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有害排出削減を目的とした稼働中火力発電所における「クリーン」コール技術のCFDモデリング

CFD Modelling of “Clean” Coal Technologies at Operating Thermal Power Plants Aimed at Reducing Harmful Emissions (原題)

S. Bolegenova, A. Askarova, A. Nugymanova, V. Maximov, S. Bolegenova, Nariman Askarov, Yryna Berezovskaya, Zhanar Shortanbayeva, Aigerim Saginayeva

Energies📚 査読済 / ジャーナル2026-10-25#エネルギー転換経営インパクト: コスト削減対象セクター: power
DOI: 10.3390/en19215082
原典: https://doi.org/10.3390/en19215082
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🤖 gxceed AI 要約

日本語

高灰分炭を焚くボイラーの環境性能向上には燃焼空気力学と段階的空気供給の最適化が必要である。本研究は旋回流、バーナー設計、バーナー一部停止、主燃焼域上部へのOFA注入の効果をCFDで解析した。BKZ-75ボイラー（カラガンダ炭、灰分35.1%）ではOFA18%が最良でCO38%・NO2 24.7%削減、基準シミュレーションは実測との乖離3%以内だった。

English

This study uses CFD to model combustion aerodynamics and staged air supply in a BKZ-75 boiler firing high-ash Karaganda coal (35.1% ash). Swirl burners cut CO and NO2 by 17.6% and 22.1%; shutting two of four burners cut CO by 36% and NO2 by 7.5%; an 18% overfire-air fraction gave the best result, reducing CO by 38% and NO2 by 24.7% versus baseline. Baseline simulation deviated under 3% from plant measurements, underscoring boiler-specific integrated optimisation.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

日本では石炭火力の段階的廃止が政策課題となる一方、稼働中資産の排出低減技術はトランジション期の現実的選択肢として参考になる。ただしSSBJ・有報開示との直接接続は弱い。

In the global GX context

For global disclosure scholarship this is operational emissions-reduction engineering rather than disclosure infrastructure; it informs transition-plan credibility for utilities retaining coal assets but does not engage TCFD/ISSB metrics directly.

👥 読者別の含意

🔬研究者:燃焼CFDと段階燃焼最適化の実証的ベンチマークとして有用。

🏢実務担当者:稼働中石炭ボイラーのNOx/CO削減策の設計根拠として参照可能。

🏛政策担当者:石炭資産の排出低減技術オプションの実現性評価に資する。

📄 Abstract（原文）

Improving the environmental performance of utility boilers fired with high-ash coal requires optimisation of combustion aerodynamics and staged air supply. This article summarises studies investigating the effects of flow swirl, burner design, partial burner shutdown, and overfire air (OFA) injection above the main combustion zone. The identified relationships are illustrated using CFD modelling of a BKZ-75 boiler firing Karaganda coal with an ash content of 35.1%. Straight-through and swirl burners with a swirl angle of 30°, the shutdown of two out of four burners, and OFA fractions ranging from 0 to 30% were investigated. At nominal load, swirl reduced the CO and NO2 concentrations at the furnace outlet by 17.6% and 22.1%, respectively. Shutting down two burners resulted in reductions of 36% for CO and 7.5% for NO2. Among the operating conditions investigated, the best results were achieved at an OFA fraction of 18%, which reduced CO by 38% and NO2 by 24.7% relative to the baseline operating condition. For the BKZ-75 boiler firing Karaganda coal, 18% was the most effective among the OFA fractions studied (0–30%); this value should not be extrapolated to other conditions without additional calculations. The deviation of the baseline simulation results from measurements taken at Shakhtinskaya Thermal Power Plant did not exceed 3%. The results highlight the need for an integrated optimisation of combustion aerodynamics and staged combustion, taking into account the characteristics of the specific boiler.

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