具体检修方案 UTTAM锅炉50问答 - 副本.doc

业主提出来的问题 源和建议检修方案 1. Impact of fuel moisture on gas volume and furnace velocity. Design moisture for Indonesian coal is taken as 14% instead of 38%. 燃煤水分高，对烟气量和炉膛流速造成的影响。印尼煤的设计含水量是14%，实际是38%。 降低燃煤含水量，可以减少排烟损失，降低对空预器低温腐蚀。 Reduce fuel moisture content, which can reduce flue gas exhaust loss, then reduce low temperature corrosion to air pre-heater 空预器末级管子损坏严重，同意更换，更换搪瓷材质。 Air pre-heater final stage tube seriously damaged, agree to replace, change to enamel materialr. 2. Right from beginning the flue oxygen was in the range of 10 to 12% 从投运开始烟气中含氧量就在10%-12%之间。 现在的含氧量与锅炉设计相差很大，含氧量高与一次风和二次风的风量和配比不正确有关。含氧量通过调风进行控制。这个问题是由于运行操作不当引起的。 Current oxygen content is much different from boiler design, high oxygen content is related to incorrect ratio and air quantity of PA and SA. Oxygen content is controlled by air adjustment. This issue is caused by unproper operation. 首先检查锅炉是否漏风。 Firstly, check whether there is any air leakage from boiler. 其次检查风量配比。一次风和二次风的风量和配比与现场的燃煤粒度等有关，需要根据现场情况调整。一次风和二次风最好的配比是1:1，燃煤颗粒度较大可以调整至6:4，但是要根据现场实际调整。 建议降低给煤颗粒度。 Secondly, check air quantity ratio. PA and SA quantity and ratio are related to site coal particle size etc, which need to adjust according to the actual situation at site.The best ratio of PA and SA is 1:1, coal particle size can be adjusted to 6:4, but shall be in line with the actual situation at site. Thirdly, coal particle size is to be reduced. 3. Loopseal did not seem to work since beginning as there was no dust in the furnace. 反料器好像从投运开始就不工作，因为炉膛里灰量不够。 根据目前的分析，由于配风不合理导致烟气流速大，灰分流失严重，影响了流化效果。 As per current analysis, due to unreasonable air ratio, cause high flue gas flow speed, ash content lose seriously, thus influence fluidization effect. 流化床锅炉的流化与燃烧的煤种关系很大，现在印尼煤和印度煤掺烧，要保证燃煤的灰分含量。 CFBC boiler fluidization is closely related to coal fuel type, now Indonesian coal mix with Indian coal to use, which need to guarantee the ash content of coal 4) High erosion rate of air nozzle in furnace 炉膛内风帽严重磨损。 风帽正常使用寿命是2年。 The normal lifetim