Phosphorus effect on ash fouling deposition produced during combustion process of sewage sludge solid fuel is a very important factor. Previous studies have only focused on decrease of the ash melting temperature and increase of slagging and sintering by phosphorus content. Therefore, research regarding combustion fouling formation and its effect on temperature reduction of deposit surface by phosphorus content is insufficient. Ash fouling is an important factor, because ash in the combustion boiler process deposits on the surface of heat exchanger and interferes with heat exchange efficiency. In particular, temperature reduction of heat exchanger surface via fouling should be considered together with fouling deposition, because this is related to the heat exchanger efficiency. Synthetic ash, phosphorus vaporization, and drop tube furnace experiments were performed to investigate effect of phosphorus on ash fouling formation and temperature reduction of deposit surface under combustion condition. Phosphorus was highly reactive and reacted with ash minerals to produce mineral phosphate, which promoted ash fouling deposition during the combustion experiments. In contrast, the occurrence of sintering on deposited fouling resulted in formation of a large hollow structure, which alleviated the temperature reduction on the deposit surface. Phosphorus content had a substantial correlation with fouling deposition behavior and influenced reduction in the surface temperature of the heat exchanger, because it led to generating low temperature mineral phases.

磷对污水污泥固体燃料燃烧过程中产生的灰垢沉积是非常重要的因素。以前的研究仅集中在降低灰分熔化温度以及增加磷含量造成的结渣和烧结方面。因此，关于燃烧结垢形成及其对磷含量对沉积物表面温度降低的影响的研究不足。灰垢是重要的因素，因为燃烧锅炉过程中的灰垢沉积在热交换器的表面上并会影响热交换效率。特别是，应考虑通过结垢使热交换器表面温度降低以及结垢沉积，因为这与热交换器效率有关。合成灰，磷蒸发，进行了落管炉实验，研究了磷在燃烧条件下对灰垢形成和沉积物表面温度降低的影响。磷具有很高的反应性，可与灰分矿物反应生成磷酸盐磷酸盐，从而在燃烧实验过程中促进灰垢沉积。相反，在沉积的结垢上发生烧结导致形成大的中空结构，这减轻了沉积物表面的温度降低。磷含量与结垢沉积行为有很大关系，并影响了热交换器表面温度的降低，因为磷会导致生成低温矿物相。