低氮燃燒器改造后對汽溫的影響與控制

2、50%MCR負荷下對汽溫的影響與控制 2. Influence and control on steam temperature under 50%MCR load

150MW負荷時B/C制粉運行，氧量設定4.9%(30分鐘穩定后參數)時開關上層sofa層輔助風觀察汽溫變化。發現單獨開啟sofa層的sofa1和sofa2開啟會加大汽溫偏差，減溫水量增加由于汽溫偏差加大曾投減溫水后機側主再熱汽溫會下降;單獨開啟sofa3層后汽溫偏差會減少但是由于是一側下降一側上漲機側總的趨勢上漲不明顯;關閉sofa層輔助風，適當開啟下層風門維持風箱差壓300pa左右后主氣溫能上漲到537(機側)左右，再熱氣溫528(機側)左右，兩側偏差不大均上漲趨勢。減溫水量增加較少。

B/C powder making operation at 150MW load, and the upper sofa layer of the switch was used to observe the change of steam temperature when the oxygen was set at 4.9%(parameter after 30 minutes stability). It was found that the opening of sofa1 and sofa2 in sofa layer alone would increase the deviation of steam temperature, and the temperature reduction water would increase. When the sofa3 layer is opened separately, the deviation of steam temperature will be reduced. Close sofa layer auxiliary wind, open the lower damper to maintain appropriate bellows differential pressure around 300 pa after temperature can rise to about 537 (side), reheating temperatures around 528 (side), on both sides of the deviation is rising trend. Less water is added to reduce temperature.

單套C制粉系統運行150WM的情況：主再熱汽溫進行觀察，發現150MW單套C制粉系統運行時主汽溫519度左右，再熱汽溫499度左右(穩定30分鐘的情況)SOF層輔助風門SOF3開大可以緩解主再熱汽溫的偏差但是主再熱汽溫仍偏低。在保證安全的前提下適當開啟SOF3層輔助風門將D層投運D2或者D3給粉機，提高火焰中心時主再熱汽溫上漲明顯主汽溫527左右再熱汽溫512左右(觀察30分鐘，持續上漲中)。

Single set of pulverizing system running wm 150 C: main reheat steam calibrate the observation, found 150 mw coal pulverizing system of a single set of C runtime main steam temperature of about 519 degree, reheat steam temperature of 499 degrees or so in the case of stable (30 minutes) SOF layer auxiliary air door SOF3 up can relieve the reheat steam temperature of reheat steam temperature deviation but god still on the low side. In security under the premise of appropriate auxiliary air door will open SOF3 layer D D2 or D3 to powder machine layer was put into operation, improve the flame center main reheat steam temperature rise obvious main steam temperature reheat steam temperature around 527, 512 (in observation 30 minutes, rising).