2、50%MCR负荷下对汽温的影响与控制 2. Influence and control on steam temperature under 50%MCR load

150MW负荷时B/C制粉运行，氧量设定4.9%(30分钟稳定后参数)时开关上层sofa层辅助风观察汽温变化。发现单独开启sofa层的sofa1和sofa2开启会加大汽温偏差，减温水量增加由于汽温偏差加大曾投减温水后机侧主再热汽温会下降;单独开启sofa3层后汽温偏差会减少但是由于是一侧下降一侧上涨机侧总的趋势上涨不明显;关闭sofa层辅助风，适当开启下层风门维持风箱差压300pa左右后主气温能上涨到537(机侧)左右，再热气温528(机侧)左右，两侧偏差不大均上涨趋势。减温水量增加较少。

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.

单套C制粉系统运行150WM的情况：主再热汽温进行观察，发现150MW单套C制粉系统运行时主汽温519度左右，再热汽温499度左右(稳定30分钟的情况)SOF层辅助风门SOF3开大可以缓解主再热汽温的偏差但是主再热汽温仍偏低。在保证安全的前提下适当开启SOF3层辅助风门将D层投运D2或者D3给粉机，提高火焰中心时主再热汽温上涨明显主汽温527左右再热汽温512左右(观察30分钟，持续上涨中)。

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).