推荐回答(1个)
天然气锅炉调整燃烧机进气大小方法是在压力开关上调整或安装节流阀控制。
① 将防爆口上的超压开关及防爆针拆下,取出介质温度传感器,取出超温开关。
② 将显示屏上的真空目标设置为25Kpa,真空转换设置为20Kpa。
③ 将烟囱上的烟气切断阀置于打开状态,将燃气球阀置于打开状态。
④ 通过燃气管上的放散管进行排空气处理,直到闻到燃气味后再关 闭放散阀。
⑤ 将随身携带的压力表装于阀组进气端的测压点上。
⑥ 将最低燃气压力开关及风压开关调至最小刻度,开启燃烧器观察 燃气蝶阀(燃烧器在大火预吹风时燃气蝶阀应旋转至 90°,在小 火预吹风时燃气蝶阀一般在 25°-30°)。若不对,应先停止燃烧 器,然后通过调节伺服电机实现。
⑦ 将阀组上的压力调节螺丝旋至最大开度,开启燃烧器进行首次点 火。有可能开始两次点火会不成功,因为燃气可能不纯或风门太 大、燃气量小等原因。
⑧ 首次点火成功后先将燃烧器保持在小火燃烧,并查看流量及调节 流量(一般情况下小火流量为满负荷小时耗气量的1/3 左右)。小 火流量调完后转到大火燃烧,并查看及调节流量(大火流量为机 组的满负荷小时耗气量)
⑨ 流量调完后,将燃烧器分别转到小火、大火运行,根据氧含量仪 器上的实测值调节风门大小(一般情况下小火燃烧后的烟气氧含 量为 5%,大火燃烧后的烟气氧含量为 3%左右),将风门调节到理 12 想的位置。
⑩ 在调试过程中应随时观察燃气压力表变化,如压力达不到要求或 波动过大则机组可能无法正常燃烧。
让燃烧器在小火位置运行,将风压开关顺时针旋转刻度盘,直到 燃烧器锁定,然后再将刻度盘逆时针旋转20%,再次开机并保证运 行正常。如还会锁定,请再将刻度盘逆时针旋转一点,直到正常 运行为止。
让燃烧器在大火运行,将最低燃气压力开关顺时针旋转,直到燃 烧器停止,然后再将最低燃气压力开关逆时针旋转2mbar,再次开 启燃烧器,若还会停止,再继续将燃气最低压力开关逆时针旋转 1mbar。
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