ash accretion的用法和样例：
例句
- In petrochemical industry,the ash accumulation and fouling of furnace tubes have a serious negative impact on furnace thermal efficiency.
石化行业加热炉炉管的积灰结垢会严重影响加热炉的热效率。 - The problem of serious accumulation of ash and scaling on furnace pipe not only increases energy but also menaces the safety of production, so it is highly noted in many trades.
摘要积灰结垢是各种炉子存在的普遍问题，它不仅引起能耗增加，且存在着各种不安全隐患，严重威胁安全生产，已引起各行业的高度重视。
