Abstract : the effect of additive lime desulfurization in cfb on the ep was discussed . main caculation and analysis on the dust density and ash characteristics 文摘:分析了循环流化床锅炉添加石灰石、生石灰和熟石灰脱硫对尾部除尘器的影响，主要从烟气含尘浓度和粉尘比电阻两个方面进行计算分析。
By use plc , system can complete function as follow : this auto - control system be applicable to the temperature and smoke and dust the deal the variety quick , control the process is difficult with the operation is ; by the temperature controlor can automatically follow to the wet tower " exit temperature , error in the ? 3 v including ; by to automatically spray fog to lower the electric resistance , with the function for full the electricity equipment accepting the dust ; because of adopting feedback closed loop , and come to a to respond to the speed quick , constant temprature control the accuracy is high ; because of adopting the sensors , and make the system circumstance to leak water quick ; system have many control parameter can set exit control temperature and adjust value low limit by key ; can communication with remote computer and have remote control 通过使用plc ，使该自控系统可以完成如下功能：适用于温度及烟尘量变化快、控制过程难以操作的场合；通过温控表自动跟踪增湿塔出口温度，误差达到3以内；通过自动喷雾来降低粉尘比电阻，以此充分发挥电收尘器的作用；由于采取了闭环反馈回路，达到了响应速度快，恒温控制精度高；通过使用各种检测传感器，使得异常情况泄水快；该自控系统具有多套控制参数，增湿塔出口控制温度及调节阀下限值可通过按键设定；可与上位机通讯，具有“现控远控”功能。
Ohmic contacts on h2 - thermally - treated 6h - sic surface by evaporating aluminum without annealing have contact resistances of 8 10 - 3 - cm2 on room temperature and keep fairly good thermal stability under the temperature of 400 . its ohmic properties do n ' t depend on the doping concentrations of the substrate , which enables us to form ohmic contacts on low dropped substrate especially on epitaxial layer 通过氢气处理6h - sic表面并镀铝后直接形成的欧姆接触室温比电阻率达到8 10 ~ ( - 3 ) ? cm ~ 2 ，温度不超过400时该接触具有较好的稳定性，其欧姆特性不依赖于衬底的掺杂浓度，是一种适宜在低掺杂衬底特别是sic外延片上制备欧姆接触的有效方法。
