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Modelling of deposits formation on heating tubes in pulverized coal boilers

机译：煤粉锅炉加热管上沉积物的形成模型

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摘要

A mechanism of particles and condensable vapour deposition enabling simulation of the deposits composition and size has been developed. The results of deposit growth on heat transfer tubes during nine months of boiler firing by subbituminous coal containing 13.9 wt percent of mineral matter are presented. It has been demonstrated that a 4 m deep front of most intensive deposition on the superheater tubes moves with time down the tubes bundle. The deposits grow quickly during the first three months of boiler operation, and then remain almost stable, reaching after nine months of operation a thickness of about 30 mm.
机译：已经开发出一种能够模拟沉积物成分和尺寸的颗粒和可冷凝气相沉积的机理。给出了在燃烧9个月的锅炉燃烧过程中，含13.9 wt％矿物质的次烟煤沉积物增长的结果。已经证明，过热器管上最密集的沉积物的4 m深前部随时间沿管束向下移动。沉积物在锅炉运行的前三个月迅速增长，然后保持几乎稳定，运行九个月后达到约30毫米的厚度。

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